Atkinson Cycle Engine

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  • Опубликовано: 21 авг 2024
  • The Atkinson Cycle is a method of internal combustion first proposed by English engineer, James Atkinson, in 1882. The Atkinson Cycle uses a different thermodynamic process than the traditional Otto Cycle common to most gasoline engines.
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Комментарии • 387

  • @benedictroberts678
    @benedictroberts678 3 года назад +557

    Translation: "The valve timing is fucky"

    • @mihailpetrovici5044
      @mihailpetrovici5044 3 года назад +27

      Look at the 1:35 the damn engine forgets to evacuate gases

    • @benedictroberts678
      @benedictroberts678 3 года назад +8

      @@mihailpetrovici5044 yep thatd be the Atkinson cycle for you, funky valve timing to force fresh fuel/air mix back up the inlet resulting in less fuel/air being burned and so better economy.
      I have probably explained something wrong as I am not an expert but I think I've reiterated what the lady said.

    • @mihailpetrovici5044
      @mihailpetrovici5044 3 года назад +2

      @@benedictroberts678 no, the exhaust valve didn't opened at the right time, if you look the piston compressed the air again and as it came down it opened tge exhaust valve as it was an intake stroke

    • @benedictroberts678
      @benedictroberts678 3 года назад +1

      @@mihailpetrovici5044 I don't think I'm seeing it.
      You mean the exhaust valve opening before the piston is at bottom dead centre?

    • @mihailpetrovici5044
      @mihailpetrovici5044 3 года назад +5

      @@benedictroberts678 the pistons goes up, intake closes late, the compression is done, the conbustion starts, the piston is pushed down, and then, when the piston come up the exhaust valve should open to let gas out, instead, it compresed that air again without any reason

  • @selahaddina.u.b.479
    @selahaddina.u.b.479 2 года назад +93

    If you've come this far while nerding on the automotive industry, you know that you cannot be amended.

    • @Kyntteri
      @Kyntteri Год назад

      Maybe but I ain't even mad.

    • @user-qd5jo9ti1c
      @user-qd5jo9ti1c 7 месяцев назад +1

      Well I am a mechanical engineer 😂

    • @marcina.2592
      @marcina.2592 5 месяцев назад +2

      What a bs...

  • @Meeper2
    @Meeper2 3 года назад +218

    I love how the narrator says that this may not apply to your Toyota while I'm just over here with an '89 Camry just wanting to know how the Atkinson cycle engine works

    • @negativeindustrial
      @negativeindustrial 3 года назад +12

      Yeah, I’m pretty sure it doesn’t apply to my 1990 MR2 Turbo either. Fuel efficiency isn’t its strongest point.

    • @KTMcaptain
      @KTMcaptain 3 года назад +4

      If you want to know how it works then this isn’t the video for you. Toyota is good at lying. My Tacoma had an “auto lsd” according to Toyota, except it was an open diff that absolutely nothing to limit slip automatically. It was traction control. It had a no slip mode called a locker, but the auto lsd button was pure false advertising.

    • @barnsnoble7066
      @barnsnoble7066 3 года назад +10

      @@KTMcaptain some cars apply the brakes to the slipping wheel so power is directed to the wheel with more traction, which behaves like a LSD. Volkswagen calls it a Virtual Locking Differential in their cars. That's probably what your Tacoma has.

    • @KTMcaptain
      @KTMcaptain 3 года назад +3

      @@barnsnoble7066 my point is that calling it a limited slip diff is false. The diff does nothing to limit slip or bias torque. I also drive a Gladiator Rubicon not a Tacoma. Got rid of that thing a year after I bought it cause it was always in the dealer getting repaired and just unimpressed me.

    • @jfv65
      @jfv65 Год назад +1

      @@barnsnoble7066 yes and Volvo did the same thing and called it TRACS. (from the 850 onwards)

  • @DSperformance96
    @DSperformance96 5 лет назад +303

    So its basically an otto motor, with a long duration intake lobe

    • @andreluz2224
      @andreluz2224 4 года назад +26

      The one they use, yeah, but is just a simulated atkinson. Real atkinsons are different.

    • @HermanWillems
      @HermanWillems 4 года назад +21

      Otto motor with atkinson cycle.

    • @marcusa.rivera6377
      @marcusa.rivera6377 3 года назад +3

      Exactly!

    • @RyanMcIntyre
      @RyanMcIntyre 3 года назад +5

      There's no Otto engine or Atkinson engine, but there are several cycles by which an internal combustion engine produces power.

    • @ryanschmitz9330
      @ryanschmitz9330 3 года назад +17

      Variable duration is a better description

  • @MC666ist
    @MC666ist 3 года назад +87

    Is it 6 stroke cycle showed o this animation? Or it's something wrong with me? 😵

    • @antimon40
      @antimon40 3 года назад +5

      I was wondering that too

    • @benedictroberts678
      @benedictroberts678 3 года назад +9

      The animation isn't great; its still a 4 stroke.

    • @neillouiellana551
      @neillouiellana551 3 года назад +10

      The animation is fucked🤣

    • @turblown
      @turblown 3 года назад

      Yes the v6 is a Tacoma engine for demonstration purposes.

    • @benedictroberts678
      @benedictroberts678 3 года назад +5

      @@turblown I feel like you've got the combustion cycle and the number of cylinders mixed up

  • @tymchuk2
    @tymchuk2 7 лет назад +126

    That exhaust valve at 2:06 is not working on time, haha

    • @Dbass91
      @Dbass91 7 лет назад +30

      Aaaha inhale, explode, compress explosion even more, then open the valve on the way down. "The piston also encounters less resistance"

    • @GewelReal
      @GewelReal 6 лет назад +3

      I laughed soo much

    • @engscott78
      @engscott78 5 лет назад +4

      @@Dbass91 You lost me at inhale

    • @cocoavideos
      @cocoavideos 5 лет назад +1

      @@Dbass91 That was funny the way you worded it

    • @cortez31
      @cortez31 4 года назад +1

      Extreme EGR rate!

  • @IprogressiveI
    @IprogressiveI 4 года назад +59

    If the Intake valve remains open longer and the Air & Fuel mixture goes back to the intake manifold, I believe that's why the EGR on the 3rd gen prius get clogged up and the throttle plate on the second gen Prius gets filled with gunk. What ya'll think?

    • @jeremypike9153
      @jeremypike9153 3 года назад +8

      Egr can be a dirty setup in any design. In the 60s they told owners use the best fuel available. After emissions regs in the 70s unleaded fuel caused the invention of egr or feeding the engine it's own waste in an attempt to make crap fuel burn properly. One way to fix dirty egr problems is designing it to feed the gases from the rear of the catalytic converter instead of in the exhaust side of the head or manifold. The catalyst acts as an egr filter before it gets fed back through the intake. This cleans everything up causing a lot less gunk to build up throughout the egr system and intake.

    • @chongweilee5903
      @chongweilee5903 3 года назад +3

      If direct injection, should be reduce the problem

    • @BigUriel
      @BigUriel 3 года назад +15

      @@chongweilee5903 Probably makes it worse actually, the gasoline actually helps keep the intake clean by acting as a solvent. It's oil vapours from the cylinder wall that clog things up.

    • @TheCUTTERbyPHOENIX
      @TheCUTTERbyPHOENIX 3 года назад +6

      @@chongweilee5903 how direct injection have anything to do outside of the combustion chamber ? DI have made it way worst ! why do DM car manufacturers does return to the port injection ?? cleaning the valve, maintaining the sealing in a longer span of time etc...

    • @TheCUTTERbyPHOENIX
      @TheCUTTERbyPHOENIX 3 года назад

      @@BigUriel actually PCR and EGR, but..

  • @blairo15
    @blairo15 3 года назад +89

    I don't know who is in your graphics department but they just illustrated a 6 stroke engine. 🤦

    • @themanguy2110
      @themanguy2110 3 года назад +1

      Man, how could they even make that mistake smh

    • @KaidudeHasanSarfaraz
      @KaidudeHasanSarfaraz 3 года назад +13

      Intake, compression, more compression, exhaust, lmao

    • @Splee13454
      @Splee13454 3 года назад +3

      Toyota's ahead of the game with a new gas-steam engine

    • @Mike_Stanford
      @Mike_Stanford 3 года назад +4

      right?! I was looking at the exhaust valve like... are you not going to explain why that's CLOSED on your exhaust stroke or? Cuz that looks like a pretty *interesting* feature of your 'atkinson cycle'..

    • @chucktaylorii
      @chucktaylorii 3 года назад +1

      I am glad I wasn't the only one who saw that. I was extremely confused. I had to watch it 3 times, because I thought something was off, but my brain didn't catch it right off. I thought VW was the only one playing with the 6 stroke (water injection) cycle, and I thought they wrote it off as a complete waste.

  • @ronaldderooij1774
    @ronaldderooij1774 3 года назад +26

    Now I am led to believe that an Atkinson cycle is a six stroke engine cycle...... OMG...

  • @gogutzy
    @gogutzy 3 года назад +11

    that's how the GS F gets 8l/100km. mind-blowing use of technology.
    what surprises me is that the fuel air mixture stored in the intake manifold isn't strong enough to clean the valves in case of direct injection (only) engines... thus making the d4s necessary...

    • @TofuInc
      @TofuInc 2 года назад +6

      With DI engines the fuel isn't sprayed until ignition, no fuel ends up in the intake manifold.

    • @a.kblur04
      @a.kblur04 9 месяцев назад

      but luckily the D4S is super refined at this point. i’ve got a 16 y/o 2gr fse and it’s still ticking away nicely

  • @rncondie
    @rncondie 5 лет назад +36

    Thank you Toyota. My Rav 4 AWD hybrid is delivering 41 mpg in the city and on the interstate even at speeds of 80 mph.

    • @benjaminsmith-haddon7316
      @benjaminsmith-haddon7316 4 года назад +2

      And that is GOOD? ???????

    • @fiendslegacy
      @fiendslegacy 3 года назад +11

      @@benjaminsmith-haddon7316 for a brick shaped car that’s not a hybrid? Yes. I was on this comment to say my 20 corolla get’s like 50 highway but combined it’s getting like 39.

    • @rncondie
      @rncondie 3 года назад +17

      @@benjaminsmith-haddon7316 Find me another AWD mid 4,000 lb SUV that will get 41 mpg on the interstate and up to 44 mpg around town.
      Those are industry best numbers for an AWD mid size SUV
      Russ

    • @neilbreen9041
      @neilbreen9041 3 года назад +3

      @@benjaminsmith-haddon7316 Is it possible to be this stupid?

  • @agent_soshi
    @agent_soshi 3 года назад +48

    So that’s why I lost a race to a 1.6L

    • @rezz7016
      @rezz7016 3 года назад +3

      it had that 20 valve advantage

    • @mg-ke3ji
      @mg-ke3ji 4 месяца назад

      😂

  • @HepauDK
    @HepauDK 3 года назад +20

    1:32 - 1:40 Shouldn't the exhaust valve open at the upstroke? By opening the exhaust valves on the following downstroke, air would be pulled in through the exhaust manifold.
    What should have been: suck, squeeze, bang, blow, is here : suck, squeeze, bang, squeeze, (whatever happens on this downstroke), blow.
    This animation is seriously f***ed up, unless Toyota invented a 6-stroke engine...

  • @OldCanadianguy953
    @OldCanadianguy953 9 месяцев назад +1

    The animation didn’t help me understand the difference as much as I hoped it would. It seems that the Atkinson cycle wastes fuel when it allows the fuel air mix to pump backwards into the intake.

  • @edrumsense
    @edrumsense 2 года назад +2

    Basically an turbo otto uses the leftover pressure to push the turbine, an Atkinson engine avoids that leftover pressure and thus avoids waste energy.

  • @michaelnewman89
    @michaelnewman89 3 года назад +5

    I drive a 2018 Tacoma 3.5 and I can tell on the highway I loose power . So like it’s a flat road at 70 mph and I have the gas pedal at a certain point then if I need to speed up just a little I only have to push the pedal a tiny bit. It doesn’t down shift to 5 gear it just feels like it’s got power. Then all of the sudden with out any reason as to why it changes it . It looses power like not a lot but it would be like a strong head wind is blowing or you have a small trailer behind you . The truck feels sluggish you have to push it harder just to maintain speeds constantly downshifting to 5th from only the slightest of inclines . I swear it’s more efficient in the normal Otto cycle than the other. Maybe there’s something to it. I average 2000 miles a month getting 22 mpg with a 2wd trd crew cab. Once I hit 100k I might be looking at a different brand .

    • @confidentlocal8600
      @confidentlocal8600 2 года назад

      The nonlinear throttle control and transmission programming have a lot to do with it. I have a manual transmission Tacoma which makes it easier to understand the engine's response in isolation. The 2GR-FKS can deliver plenty of torque at 1800-2200 rpm, but it takes a while (a couple seconds) to build power, presumably because it has to switch from Atkinson to Otto mode which does take time. The additional intake noise (sounds throaty) at low to moderate load is how you know it's in Atkinson mode because the throttle is left open to reduce losses while "throttle" control is performed by varying the intake duration. To get to Otto mode, the ECU must close the throttle and shift the valve timing while keeping the mixture on-target between the port and direct fuel injection systems. There's a lot going on in this engine, and I imagine that getting the transition from low to high torque at low RPM is very challenging to manage quickly and/or seamlessly. When you consider that they're basically accomplishing a form of variable displacement without cylinder deactivation and without brute-force turbocharging, it's amazing it works as well as it does. I can drive my commute without exiting Atkinson mode and consistently get above the sticker MPG. Do I wish the throttle response were quicker? Absolutely.
      There are tunes available for the 3.5 that the TacomaWorld folks swear by to improve the low-end response of the engine.

  • @liamteetz1329
    @liamteetz1329 3 года назад +21

    R E V E R S E V T E C

  • @dazaspc
    @dazaspc 3 года назад +14

    They might call this an Atkinson cycle engine but a true Atkinson cycle motor uses a linked crankshaft to mechanically shorten every other piston stroke. This means it only breathes 1 way through the intake valve and does not waste rotational momentum.
    This style [As described by Toyota] results in a very contaminated intake path with combustion remnants, oil from cylinder walls and excess heat in the intake path.
    This will cause problems with carbon fallout in the intake path, contaminating inlet ports and valves, also EGR and PCV contamination. Throttle bodies and sensors linked to the intake system can also suffer from contamination. Because of the heat any remaining fuel tends to remain in a form where it will be able to return to the cylinders but the oil and carbon fall out and turn into a hard tar like substance.

    • @BigUriel
      @BigUriel 3 года назад +3

      The Atkinson cycle engine is a specific patented engine design with a mechanically different compression and power strokes. The Atkinson cycle is just a thermodynamic principle that can be implemented by numerous different engine designs. The thermal cycle only pertains to what is happening to the gases inside the engine, not how the mechanical components are designed to achieve that. Same way there was an original "Otto engine" that doesn't look anything like our modern "Otto cycle" gasoline engines.
      Most manufacturers with continuously variably valve lift technology implement the Atkinson cycle to some extent (like for example limiting the intake valve opening time which achieves the same as keeping it open during part of the compression stroke).

  • @perbilse573
    @perbilse573 2 года назад +2

    Toyota's Engineering Dept knows what they're doing; it's a pity Toyota's Marketing Dept doesn't.

  • @Jimmy-rn5ds
    @Jimmy-rn5ds 17 дней назад

    The next stage of hybrid is complete control of valving timing, generating, motoring consistent with optimum engine efficiency and road condition by fast acting chips. Such control would reduce many mechanical parts.

  • @fd2824
    @fd2824 7 месяцев назад +2

    This looks more like a Miller cycle - but without supercharger.

  • @ViperDent
    @ViperDent 3 года назад +8

    This just sounds fancy for VV-T/L/D and lean fuel mixture

  • @BigLeagueDrew
    @BigLeagueDrew Год назад +3

    And now anyone who didn’t catch the mistake is probably very confused on how engine cycles work.

  • @kickyadick
    @kickyadick 3 года назад +69

    One minute in, I learned effectively nothing about why Atkinson cycle saves fuel.

    • @alexlo7708
      @alexlo7708 3 года назад +4

      It reduces intake volumetric when car doesn't need power such constant low speed cruise or deceleration or idle by prolong time to shut intake valve so that the air fuel mixture would have some return back to intake port waiting for next cycle.

    • @martinfisker7438
      @martinfisker7438 3 года назад +3

      In an Otto engine, at the end of the power stroke, theres still a great pressure in the cylinder, which is simply wasted in the exhaust cycle. This is reduced in the Atkinson cycle by not allowing as much air in the intake cycle

    • @TheCUTTERbyPHOENIX
      @TheCUTTERbyPHOENIX 3 года назад +1

      @@alexlo7708 yeah because we all know the phenomenon named "air fuel mixture (..) return back in the intake waiting (casually) for the next cycle" and no one know the phenomenon "wall wetting" or "back wetting and so gunked (with soot coming from egr or remnant from egr) valve" ... your fluid dynamic knowledge is impeccable.

    • @TheCUTTERbyPHOENIX
      @TheCUTTERbyPHOENIX 3 года назад

      @@martinfisker7438 so less efficiency we get it, that's why it's a failed cycle, that green people tend to make this shit happen so they all can say : see combustion engine is less effective that chinese electric motors nowadays.. you got me grin..

    • @TheCUTTERbyPHOENIX
      @TheCUTTERbyPHOENIX 3 года назад +2

      in fact it waste fuel, by letting the mixture backing up to the manifold, and then gunking the back of the valves, the throttle plate, the variable intake conduits when you have it etc.. not to mention it act together with egr too add more fucked issue to run that engine obsolete more quickly !

  • @OldCanadianguy953
    @OldCanadianguy953 2 месяца назад +1

    Vomiting backwards through the intake of the fuel air mixture still seemed screwed up to me.

  • @daneron71
    @daneron71 7 лет назад +4

    Zit inderdaad een fout in het filmpje, dacht dat ik naar een nieuw type motor zat te kijken :-)

  • @slowpoke96Z28
    @slowpoke96Z28 2 года назад +1

    so intake valve timing and duration is the difference between Otto and atkinson?

  • @theskig
    @theskig 10 месяцев назад

    I still can't get it. Where's the weird mechanism? I mean the one that makes the piston run two different lenghts.

  • @billkill3055
    @billkill3055 7 месяцев назад

    I love atkinson cycle engine. It reduce gas usage.

  • @stevegraham3817
    @stevegraham3817 3 года назад +1

    Why is the background music so loud...??

  • @charleshines1553
    @charleshines1553 2 года назад +1

    I once rented 2001 Corolla and it was quick off the line but god forbid you ever want accelerate while part way up a hill. My usual car was a Chrysler with a 3 liter V6 and was fun to drive too. I am just glad the Corolla was not mine and I would be rid of it soon enough. Even the 2002 Neon I bought after the Chrysler felt quicker. It had a 2 liter 132 HP 4 cylinder that is somewhat similar to the 1.8 in that Corolla. The difference was that the Neon was more willing to accelerate on a highway road with a noticeable grade (while already moving), the Corolla would have none of it! It would be a true surprise to me to drive a 4 cylinder Toyota these days and see if they got any better (other than having CVTs). Sure Japanese cars are reliable but with some of them being ugly and boring it doesn't help their case when it comes to making me want one. For one it has to be able to get out of its own way, that Corolla couldn't do it to save the world!

    • @Jasiel.95
      @Jasiel.95 2 года назад

      Dude, that’s the car I’ve been driving for years and it’s ridiculously slow.

    • @charleshines1553
      @charleshines1553 2 года назад +1

      @@Jasiel.95 I know Corollas are slow. They might beat you at first but then on a hill everyone will beat them!

    • @howardsimpson489
      @howardsimpson489 Год назад

      For lack of acceleration the winner was a 1200 cc side-valve 1949 Triumph Mayflower, even on the flat you could nor feel it. Every up slope required down shifting, sometimes ordinary roads were too steep. British cars were not all that bad but it was a harbinger for today. They did look good and were as solid as a brick outhouse.

  • @ryancombs619
    @ryancombs619 3 года назад +1

    So it’s basically vtec?

  • @yacinealg152
    @yacinealg152 3 года назад

    This is a new type of V-tec from Toyota

  • @dboucher26
    @dboucher26 4 года назад +4

    Same compression as Otto engines, but with longer strokes like Diesel engines. I actually like this concept. I drive a lot and I spend a lot on fuel. This wouldn’t provide life changing savings, but it’s a step forward.

    • @spencerkleiman5035
      @spencerkleiman5035 Год назад +2

      It's not a longer stroke, it's a reduced volume of air being compressed, because the air isn't compressed as soon their is less parasotic resistance in the engine. You're also burning less air and fuel but in the same confined space. The part I don't get is reduced compression reduces efficiency which is why this engine doesn't get the MPG gains it should to make the Atkinson worth it. That reduced compression is why it has no power. If they increased the static CR before introducing the cycle I wonder if I would be possible to even that out, but then there are changes to everythings physics when one feature changes so idk

    • @nicfing
      @nicfing Год назад

      @@spencerkleiman5035 o

    • @DH-og5yr
      @DH-og5yr 11 месяцев назад

      @@spencerkleiman5035well the mpg is better so obviously it’s better for traffic jams and cruising

  • @ItsIdaho
    @ItsIdaho 5 лет назад +20

    Who else is here after Tyler Hoover put Nitrous in his Prius?

  • @Z.z.z.z.
    @Z.z.z.z. 2 года назад

    Honda already used this kind of cycle shifting in R series engine since 2006

  • @lnrd150
    @lnrd150 3 года назад +2

    Can I just press accelerator pedal not so hard?

    • @Belrmar
      @Belrmar 3 года назад +1

      No, because the pumping losses still apply, and shortening the compression stroke reduces the work needed for compression of the gases

  • @Funkbass85
    @Funkbass85 6 месяцев назад

    This isn’t an Atkinson cycle, it’s VVT. The Atkinson cycle as proposed by James Atkinson literally hinges on a piston connected to a a crankshaft via a double pivot linkage. An Atkinson completes the Otto’s 4 stroke cycle in one cycle or Revolution off the crankshaft. Toyota stop lying.

  • @charleshorseman55
    @charleshorseman55 Год назад

    I still don't understand why this called atkinson rather than miller outside of the lack of forced induction

  • @o_o6869
    @o_o6869 2 года назад

    still very educational

  • @carsonw722
    @carsonw722 7 месяцев назад

    Could someone help me understand this? What's the point if some fuel gets pushed back into the intake? Now you're wasting fuel and the computer has no way of accurately measuring the fuel:air ratio for the next combustion cycle. I genuinely don't understand how this is MORE efficient

  • @geonerd
    @geonerd 3 года назад +5

    Uhg - what a horrid corporate effort. This could have been so much better.

  • @deviloftheskies
    @deviloftheskies 2 года назад

    Long story short- Otto cycle with an intake valve lag during the intake stroke. Into the compression stroke.

  • @theeverythingguy8532
    @theeverythingguy8532 3 года назад +2

    How about simply use lower compression?

    • @RyanMcIntyre
      @RyanMcIntyre 3 года назад +3

      That reduces power but doesn't have any other benefit

    • @codemang87
      @codemang87 3 года назад

      I think you might be on to something here. I'd bet compression is a lot lower on Atkinson than on Otto.

  • @connorwilkinson7370
    @connorwilkinson7370 Год назад

    I live somewhere called Atkinson, does this mean k get a free Atkinson cycle powered vehicle?

  • @yahyayarim8518
    @yahyayarim8518 4 месяца назад

    Rica etsem altyazılardaki otomatik çeviri seçenekleri arasına ‘Türkçe’ dil seçeneğini de ekleyebilir misiniz? Sizi anlamak ve takip etmek istiyorum !!!

  • @Surferant666
    @Surferant666 3 года назад +1

    This is how to make a simple variable compression engine .

  • @KamiKatzeCos
    @KamiKatzeCos Год назад

    "might not be applicable to your toyota model"
    Me with my Mazda Mx-5: Oh, okay.

  • @briansantos4637
    @briansantos4637 3 года назад +5

    They got vvt solenoids, nothing new

  • @gayealisir5661
    @gayealisir5661 Год назад

    Hmmm Toyoda Canada. Interesting Eh?

  • @anthonyxuereb792
    @anthonyxuereb792 2 года назад

    Still an Otto though and having all that complexity to overcome its shortcomings is added dead weight and more items to manufacture and service=costs.

  • @SkaBob
    @SkaBob 2 года назад

    So if using direct injection is this still needed ? Because DI motors can have higher compression or longer strokes with no chance of pre-ignition, the intake stroke brings in nothing but air. I was looking at the kia niro, it gets better gas mileage then the prius and other Atkinson cycle toyotas, but it uses a non atkinson motor, just a plain 4 cylinder, 13:1 compression with direct injection.

  • @samb6398
    @samb6398 4 года назад +4

    So this is why my tacoma is so underpowered

    • @georgesawtooth2214
      @georgesawtooth2214 3 года назад +3

      Yeah it is underpowered. I made the mistake of trading my 16 Frontier for a 19 Tacoma because I was brainwashed about reliability. The 16 Frontier never gave me problems and it had way more power too and was immensely fun to drive. Now I drive this Tacoma and wonder if the thing can make it up the next hill.

    • @specialopsdave
      @specialopsdave 3 года назад +4

      Atkinson cycle turns off at full throttle. Toyota just makes slow (but still good) trucks lmao

    • @Bwelsh1981
      @Bwelsh1981 Год назад

      I think certain people should work in this field before you start sizing up Reliablilty . I have a '23 Tacoma and that thing Runs perfectly fine for my taste and can take a hill with 0 problems. The 04 Tacoma I had was very underpowered, but that Engine will run for a lifetime! I don't understand what some of you people want or expect. Toyota buyers know what they want and what to expect. Sometimes I just don't get it. Did you not test drive the truck before hand? Geez

  • @gigabit7079
    @gigabit7079 Год назад

    Nice...but the video doesn't explain nice the difference between the cycles. Just goes too fast as it was so simple, and the images also doesn't help.

  • @AsianDrag0n
    @AsianDrag0n 2 года назад

    My 2006 Ford Escape hybrid uses an Atkinson 4 cylinder engine

  • @thizzfox
    @thizzfox 5 месяцев назад

    So it's a reverse turbo

  • @kwhzgud
    @kwhzgud 2 года назад

    why don't you use a super charger in non hybrid vehicles?

    • @Piggy-Heo
      @Piggy-Heo 2 года назад +2

      Then ita not going to name Toyota anymore. Since boosted cars will not be as reliable as a natural aspire.

  • @baguskusumaloka
    @baguskusumaloka 3 года назад +1

    Atkinson, sound funny to me. Is that the actor who play as a English man?

  • @portalbucket5365
    @portalbucket5365 3 года назад +4

    "Lower powet output"
    Since when did all vehicles need at least 200 hp. A prius would do fine with 100 hp and get 50 mpg doing it

    • @mccoma11
      @mccoma11 3 года назад

      I remember when mom got a little toyota paseo. It advertised 100 hp and it was very small. That would have been 1990(ish). I bet the mpg was pretty good on that thing. I had just started driving and I beat the hell out of it lol

    • @7thsoneli
      @7thsoneli 3 года назад

      I am 64 my first car was a Nash metropolitan,55 hp 4 cylinder,that car is worth thousands now.lol

  • @praneshkandasamy3175
    @praneshkandasamy3175 Год назад

    I dont see the point of having the atkinson cycle engine in hybrid vehicle that cannot switch to otto cycle, you could instead have a engine with low CC, which in same way gives low power and high fuel efficiency

  • @sunny1summer
    @sunny1summer 3 года назад

    so the atkinson push out the air+fuel mixture, burn less energy, but how about the amount of fuel got push out? wasted?

    • @Piggy-Heo
      @Piggy-Heo 2 года назад +2

      Those air and fuel mixture will going into another cylinder instead. They're savinv fuel by using the mixture from the other cylinder for the next and keep go on. Nobair amd fuel going to waste since it going to the intake manifold which eventually will ending up inbthe combustion chamber

  • @konkonisrael1082
    @konkonisrael1082 3 года назад +7

    I love the Mr. Bean's engine

  • @Vnfx
    @Vnfx 2 года назад

    This is miller cycle, atkinson is mechanically different

  • @franciscoman22
    @franciscoman22 3 года назад

    Sooooo on hybrids they are just expelling some of the air and fuel the engine putted in before, wouldn't that be just downsizing but with more steps? And doing it less efficiently

  • @april68628
    @april68628 3 года назад +1

    1.6 4 cilindir walvematic+lpg😍

  • @bradcogan8588
    @bradcogan8588 3 года назад +1

    Like VVTi but the wrong way around.

  • @MaestroCipher
    @MaestroCipher 2 года назад

    Awesome!!!!!!!!!!!!!!!! 🤩🤩🤩🤩🤩🤩🤩🤩🤩

  • @shultz4877
    @shultz4877 3 года назад

    Is it running just rich?

  • @spookydude3298
    @spookydude3298 2 года назад

    That's the Miller cycle not the Atkinson cycle

  • @ProsenjitDasrocks
    @ProsenjitDasrocks 4 года назад +1

    Nice way of explanation of atkinson cycle.

  • @nigelmitchell351
    @nigelmitchell351 3 года назад

    Is this normally aspirated.?

  • @jetstream454
    @jetstream454 Год назад

    Why on earth is the exhaust valve only opening as the piston travels down, making it look like a 6 stroke 😂😂 Dayum Toyota

  • @getoutmecar2940
    @getoutmecar2940 3 года назад

    I am genuinely bamboozeled

  • @pietro6206
    @pietro6206 Год назад

    Isn't this miller?

  • @Abszurdista-fatalista
    @Abszurdista-fatalista Год назад

    Next: Open exhaust valve on work stroke.

  • @iainmillar1532
    @iainmillar1532 3 года назад +1

    TLDR: It delays closing the inlet valve to allow relatively more expansion on the combustion stroke.

  • @freescape08
    @freescape08 Год назад

    0:34 What? Two compression strokes and two intake strokes? Without exhaust!!!?

  • @woodyofp8574
    @woodyofp8574 3 года назад +53

    A motor that gets double the fuel economy but half the power isn't more efficient.

    • @specialopsdave
      @specialopsdave 3 года назад +16

      Except it doesn't make half the power. Watch the video, and you will learn that the Atkinson cycle is disabled under high load.
      Also, I think you don't know what the word "efficient" means.

    • @dusanbolek8004
      @dusanbolek8004 3 года назад +6

      @@specialopsdave Except it won't double the fuel economy either. In real life Toyota engines are not more fuel efficient than their competitors. That's why this modification is not widely used in other vehicles.

    • @dhy5342
      @dhy5342 3 года назад +2

      Why do you equate efficiency and economy?

    • @aircraftnut15
      @aircraftnut15 3 года назад +1

      @@specialopsdave especially of a system or machine) achieving maximum productivity with minimum wasted effort or expense is the definition of efficiency
      So yeah an engine that puts out less power but uses more fuel is not efficient
      An engine that’s used less gas and makes more power is efficient
      Your backwards bro

    • @specialopsdave
      @specialopsdave 3 года назад +2

      @@aircraftnut15 So you're saying that the atkinson cycle increases fuel consumption? No, it doesn't. It reduces fuel consumption by 30% while reducing power output by 25%, meaning if you *increase throttle* so the engine outputs *the same power,* it will consume approximately 5% *less fuel for the EXACT SAME HORSEPOWER.* It's only when you near 100% throttle that the lower power output would become noticible, but by that point, Atkinson cycle has already turned itself off, and the engine is running a conventional engine cycle.

  • @Trompunitalphapropan
    @Trompunitalphapropan 3 года назад

    How does it make the expansion stroke larger and why does the exhaust valve open at 2:06

    • @polypoly7966
      @polypoly7966 3 года назад

      it makes the compression time shorter, so the useful compression stroke is not the full value. This makes the expansion stroke still being 100% of the basic design longer than the now shortened effective compression stroke. Expansion stroke is unchanged. Compression stroke active length has been reduced.

  • @nokithecat
    @nokithecat 7 лет назад +15

    With Toyota's infinite wisdom,,,,
    Toyota engineers, can you make a pickup frame not rust out so fast and the truck snap in two ? ? ?
    Can you also make the bodies not rust so fast ? ? ?

    • @nativebutnotofthisworld9792
      @nativebutnotofthisworld9792 5 лет назад

      my brothers bed fell off within a year brand new... not from rust but he lives where there are only dirt roads and just couldn't handle the continuous shaking.

    • @wvadam
      @wvadam 5 лет назад +2

      Trucks are used in adverse conditions and when you scratch the paint down to the metal the steel will rust on any vehicle. To the design challenge, why don't they just offer an option for stainless steel or aluminum body panels for and extra 2 grand? For people in the rust belt it would be well worth it and the resale value would be head and shoulders above anyone else. The only reason I got rid of my last car was due to rust or I would be driving it 15 years or more. IMO I think they keep fooling themselves into thinking this years "new coating" will keep it rust free for way longer than it actually will. Kind of the same way roof shingles keep changing formulations and say "30-year shingles" and now fiberglass shingles but it is all the same tar crap that lasts half that at best and the consumer has to buy and replace again and again.

    • @confidentlocal8600
      @confidentlocal8600 2 года назад

      Use Fluid Film and you won't have rust issues.

  • @alexanderarellano1392
    @alexanderarellano1392 3 года назад

    for 2020 tacoma sr5 3.5L V6 engines, is this combination of Atkinson and Otto going on? thanks for your response.

    • @andrewelfrink7464
      @andrewelfrink7464 3 года назад

      Yes, the engines run on the atkinson cycle when demand for power is low. Once demand for power is needed (you floor it) the see engine runs on the otto cycle.

  • @VCfisherman3592
    @VCfisherman3592 4 года назад

    Is there any additional maintenance involved for the backflow of air/fuel into the intake manifold? Intake system cleaning? Etc?

    • @shadowfan982
      @shadowfan982 4 года назад

      well the fuel is what kept the carbon off the valve seats as it washed away in port injected engines

    • @Bwelsh1981
      @Bwelsh1981 Год назад

      These Engines have Both Direct Injection and Port injection to help with these problems.They switch on and off through different modes depending on driving habits.From a mechanics standpoint point I have seen that this design does its job and works very well. If you are familiar with how Toyota Engineers things, they have pretty much worked out the bugs with this design. Keep in mind that Toyota Pioneers a lot of mechaical designs and sells those ideas to other manufacturers . Toyota also doesn't give up on their innovations either. They keep churning them out while perfecting them in the process.

  • @yz250ftony
    @yz250ftony Год назад

    Adopt this method while drinking and your beverage will last longer. When you tilt the cup/can/glass back, spit some back out after every drink.
    So that's why priuses are so fcking slow, they "backwash" the stuff needed to make power out of the cylinder

  • @ajidamarjati
    @ajidamarjati 7 месяцев назад

    Atkinson = Miller?

  • @tristanwait4itlegendary
    @tristanwait4itlegendary 3 года назад

    This still doesn't explain why they used a 1.8l engine in the Prius. An why they are so scared to put a turbo for more fuel efficient

    • @violet.orange
      @violet.orange 3 года назад +1

      So that it's more efficient at higher speeds

    • @violet.orange
      @violet.orange 3 года назад +1

      Turbos are economical as low speeds but inefficient as high speeds

  • @boboutelama5748
    @boboutelama5748 4 года назад +1

    A little question for me to Toyota. Imagine now you would bring a sporty Toyota, let's say, a Lexus RC, that would be fitted with an hybrid system, but it's engine could swith into auto or atkinson, like the regular ones. Wouldn't it bring a plus in performance, when needed, and letting it be clean when desired ?
    Also, combine the same system as above, but insert a turbo in the equation. Wouldn't it be impossible ? Because, you are doing this on your LeMans cars, and I still believe that this could make a pretty interesting sportscar concept.

    • @CouchMan88
      @CouchMan88 3 года назад

      I recently bought a Lexus RC 350. As far as I know it does switch between the Atkinson and Otto cycle however it’s not a hybrid. I don’t see why they wouldn’t use both modes on a hybrid besides a hybrid trying to utilize the best fuel economy. It may be complicated having 3 different modes of engine operation as well. You may be onto something with the turbo which might be why Toyota and Lexus is sticking with naturally aspirated engines for the most part, although some of the 4 cylinder Lexus are turbo.

    • @p_enta5012
      @p_enta5012 3 года назад

      @@CouchMan88 The 3.5L toyota V6 does this? I didn't know that.

  • @Testtestnotest
    @Testtestnotest 4 года назад

    In my owner' s manual it says that my toyota has came with a rotary engine but I haven' t found anything regarding to cycles. Can someone help me?

    • @Hopeless_and_Forlorn
      @Hopeless_and_Forlorn 3 года назад +2

      Rotary engine in automobiles refers to the Wankel engine which, to my knowledge, Toyota has never produced. I had a rotary-engined Mazda long ago and it was junk. Worst car I have ever owned.

    • @Testtestnotest
      @Testtestnotest 3 года назад

      @@Hopeless_and_Forlorn it was sarcasm hahaha

  • @user-qi7id4me3l
    @user-qi7id4me3l 2 месяца назад

    Still a Four Stroke Exactly.

  • @Land_Cruiser_40
    @Land_Cruiser_40 3 года назад +1

    Does this apply to my '80 Land Cruiser? Thanks in advance.

  • @alialobad3812
    @alialobad3812 3 года назад

    So why not using smaller otto engine!? I can’t understand the benefit of that Atkinson 🤷‍♂️, it is 2.0 engine using fuel like in 1.8 or smaller but the power is less than 2.0 and 1.8 😵‍💫😵‍💫😵‍💫.

  • @n.p.3472
    @n.p.3472 5 лет назад +3

    Can Atkinson Cycle engine be remapped to gain more HP? e.g. Accord Hybrid

    • @zo1dberg
      @zo1dberg 5 лет назад

      You'd have to modify the cams to do this.

    • @EATSLEEPDRIVE2002
      @EATSLEEPDRIVE2002 4 года назад +3

      If you wanted a fast car, why did you get a honda accord hybrid😂

    • @specialopsdave
      @specialopsdave 3 года назад

      The atkinson cycle turns off at high throttle anyways so why do you care

  • @Freelanceken
    @Freelanceken 3 месяца назад

    That's not Atkinson, that's Miller Cycle

  • @andrewjeffrey6969
    @andrewjeffrey6969 Год назад

    I like gs450h 😅

  • @user-hk5bm8pm4e
    @user-hk5bm8pm4e 3 года назад +1

    Нихрена не понял, но очень интересно!

  • @salvor1
    @salvor1 5 месяцев назад

    partway through, I can tell this vid is not going to tell me what I want to know.

  • @Freakybananayo
    @Freakybananayo 3 года назад

    why not use the miller cycle?

    • @---rw8xs
      @---rw8xs 3 года назад +1

      Someone told me that the Miller cycle is better for supercharge engine

    • @stumpy2000
      @stumpy2000 2 года назад

      It's basically the same but Miller uses a compressed charge (normally a supercharger) to compensate for the loss of low rev torque.

  • @TheTomahawkninja
    @TheTomahawkninja 5 лет назад +22

    this is not a new cycle. its called bad valve timing

  • @jessegonzales7377
    @jessegonzales7377 3 года назад

    Junk timing, less fuel, smaller cylinders. Why?

  • @godspeed2145
    @godspeed2145 Год назад

    How is it atkinson, isn't valve timing miller? The other one has more to do with multiple rods

  • @lazzer408
    @lazzer408 4 года назад +3

    Animation is wrong