Many many thanks to both of you. I landed upon this video completely by chance (was looking for Prius inverter related videos), and I am thrilled that I did. The final bit where you put all the components together, and talked us through how MG1 and MG2 synchronize and drive the wheels either via battery power or via IC engine power was fantastic as well. I have always believed that opening up a machine is the best way to gauge quality, I think I now consider myself better informed about Toyota's hybrid drive systems thanks to this video.
Great video guys. There are a lot of so-called auto enthusiasts out there who have, for some insane reason, convinced themselves that hybrids are impossibly complex, unserviceable, frail, an affront to god, a harbinger of the apocalypse, etc. I wish I could force them all to watch your video, because from a maintenance standpoint, this is no more complicated than a conventional hydraulic automatic transmission - and as you guys mention, the Toyota HSD power-split drive is practically bulletproof. I've been in Camry Hybrid NYC taxis with 400k+ miles on them. They're incredibly durable cars.
+doctor zaius It looks SIMPLER than a conventional hydraulic automatic transmission - at least mechanically. I'm wondering about the computer control box which reads the 2 shaft speed sensors and decides when to start the engine, how much juice to give to M2 to control its speed, etc.
+Theodore Zuckerman It is. As a gearhead and embedded systems engineer, I see this video and want to go pillage priuses for fun brushless DC motor parts at the junkyard. I guess I might do that Sunday, actually... Anyone know if the motor-generators are bathed in transmission fluid, coolant, or neither? I'm guessing ATF or air since I see no coolant deposits, but I couldn't tell for sure.
this video is very useful, I wish you success always and don't get bored to share your knowledge with the world, greetings from automotive from Indonesia
verry verry informitive. i was under the impression that the motor and electric motor were on a seprate drive thank you verry much for posting this video.
I'm just a Prius owner and looking at this device I feel like I own a seriously advanced piece of engineering. This is seriously high technology. To the un initiated it looks like it came from outer space.
BTW, with those lineman gloves, you are supposed to wear the accompanying leather gloves over them to protect the insulation. The rubber gloves by themselves can be easily damaged and should not be trusted with high-voltage.
this was really interesting, I wondered how they work you guys did a good job, . you hit the hight points now the unit work,I have a general idea of how it all works now thanks
@ 15:30 another reason why it doesnt run is because its "poling" without the rear bearing being located and the air gap being small, the rotor is being pulled by the magnetic field over to the stator
20:03 hpm magnetic motors also suffer less from heat & generate less heat on start up, and also use much less intitial inductive load which keeps the heat down & lengthens the life of the motor they also weigh much less .
IF you are going to work on cast aluminum on the ground, lay something soft down before placing a mating surface face down. Cast aluminum gouges and scrapes easily and mating surfaces are machined. Please do not do what they did and place it directly on concrete if you run into a corroded bolt and accidently turn the whole thing you could destroy the surface causing premature failure of parts and or leaks.
Yes, great video. I really enjoyed watching this as an owner of a Lexus RX400h with basically the exact same HSD system. A few pieces of advice to go along with what Mishale said though. I definitely agree with her about the gearbox 100% but another thing. The metal tools as well should not be used on any machined mating surfaces, especially soft aluminum. No metal hammers to pop out gears either. They make hard plastic wedges and special plastic tools for that, plastic hammers to bang on the wedges and gears.
yes , it's just good work habit to always do things properly even if it is broken. remember bad habits are easy to form while good habits hard to achieve. yes I'm guilty of typical guy thing too sometimes when I really want something done yesterday.
it is maybe like a torque converter when is spins then grabs , I just thought of that because I had one go bad at one time and that is what it does like slipping then grabbing but with a noise ,bang
Awesome vid I have always been so curious what it looked like in side ...Mine is at 300K and I think it is going to my project tear down ..I think its an inverter issue so might not make to transmission ..thx guys !!
Thanks!, Jason the Tech in the Video let me know they go through extensive training on how to open these, we had the phone book sized manual sitting on the desk next to us. But being that we did not plan to put it together again, and that it was damaged in a wreck, we did the typical 'guy' thing and skipped the manual :)
Thanks for the video, really helpful. My Mk1 Prius has a mechanically-operated park pawl that's not engaging for whatever reason, I'm trying to figure out if it's a massive job to get it out, in case it it broken, or whether it could be the cable isn't pushing it far enough to engage.
Think I figured out where my transmission failed. Somewhere between the chain and planetary gearset, seeing how it can't move or charge and makes a grind. That or a bearing went and dislodged or grenaded that main set between the motors
The video was shot with (2) Video cameras, one was a DSLR with a max 5min record window. We did not have a camera man, so I had to run back every 5 min and restart the camera, somewhere along the line I bumped the white balance and all of the videos where blown out grrr. Next time I will have to find a camera guy to help with things :)
you can probably buy a cheap VFD (variable frequency drive) on ebay that will directly drive that motor off of 120V or 220V and allow varying power and speed
using a VFD (Variable frequency drive) $150 new ebay 1.5-2 kw .5 - 400 hz would allow a gradual ramp up in speed for testing with no load a 30 - 50 kw VFD would allow the motor to used to full power (disable power split planet gears,speed encoder, 300v to dc bus in VFD for a pure electric prius
Also the orange wires are strict when u hook them up or what is the order if I just want to make sure they are correct. I replaced the battery and tried another inverter but so far engine wouldn't turn at at. I hear a click but never turn the engine. Even when the car in ready mood. Thanks for the help. Love the video
I am not worried about the electrons -- I want to see you put the whole dam thing back together - Can't you fix that burned winding ?? The wire is cheap ?
My Prius is at Toyota at the moment, it makes a whining noise when it gets to 60 mph. They are telling me they have to replace the whole gear box as it’s one unit. Also having problem with the Hibrid battery switch. Yet they are telling me they have to replace the battery rather than checking the cells. Feeling frustrated.
@TheTrueRandomness Thank you! I do A/V for a living so that may have helped. :) I was not able to get a camera man this time, and with one of the cameras that would only record for 5 Min at a time I had to get creative with editing haha
Why UR not using a impact cordless tool suitable for transmissions, I fell sleepy wile U wore ratcheting, and also nice set up on the battery station, I use to have my stereo there. although Very Good Job . no often we're going to see this
I have a 2004 civic hybrid qirh 184000 miles never been wreaked and when I start to take off from a stop I feel like a bang like a jump into gear type noise , it does it all the time when starting from a complete stop sometimes it is an easy noise or a harder bang like jumping into gear , like a trans slip , can you give me a idea of what this may be ,
Is there a way to seperate/remove the transmission from the output of mg1 and 2? As in... would it be possible to take an out put from the motors and hack off the housing section of the transmission to possibly weld on an adapter plate... ?
wow is all i can say alot of work a bit beyond my knowledge but very interesting as im always studying this type of stuff so thanks for a real neat vid the gears i understand the electrics not quite ive taken apart computer harddrives so am fimiliar with very strong mags just those little things can pinch yur fingers ouch but im pretty daring and will take apart most anything
You guys are great mechanics. I did Prius inverter projects in 2010 but mainly on electrical part. Thanks for showing us what's inside a Prius motor assembly. By the way, you guys suck in electronics. Those are not AC motors. They are DC brushless motors which has to be controlled by sensing what rotor position is. The inverter fires DC pulses to the stater just a bit ahead of the rotor magnet position. If you apply AC like you did on this brushless DC motor, it will rotate forward and backward at the frequency of your AC source.
Don Zheng “by the way, you guys suck in electronics”.... and you sir just butchered the English language. Next time you berate someone, be sure to compose a sentence and or paragraph that’s beyond that of a 2nd grader...
@@nordicpride9708 You may have noticed that everything in your house and garage has been made by ppl who can't even speak your language, but who have your money. Are you proud of that?
woul like to thank you for making this vieo though I would never own any junk technology(more than likely never) such as this , I will definatly work on them for $90hour. it is good to know different things. like this work if opportunity comes about to design better solutions or to just fix these.
My prius gen 3 stopped me on the road. It give P0335. Crankshaft Position Sensor. Sensor changed, wiring harness ok, Ecu changed still the car refused to start. I thinking the mg1 has gone bad. Before the car stopped me, it was rattling and making knocking sound on at slow moving speed when the HV battery is charging only. If the Mg1 stop charging the HV battery the rattling noise stops. Could it be my transaxle that is my problem. I thinking of buy new engine and transaxle?
Hello guys. Thanks a lot for this video. Please do you have a tear down video of the 3rd generation gearbox? I bought a brand new Prius 3rd gen. from the US and shipped to Nigeria where I live. It started rattling almost from the very beginning. Initially I thought some objects had fallen into the fans but after a careful check I found nothing outside. Prius is not sold in Nigeria and I didn't want it completely damaged by quacks. I strongly suspect something wrong with the transaxle . I am a mechanic. I have checked inside the engine with a borescope and found nothing. I have changed the IGR and also chucked the intake manifold; both are pristine clean as the vehicle has done only 17000 miles in all. The car has been grounded for a year as the rattling got out of control and the Check Hybrid System won't let it engage the drive or neutral. It quakes heavily on starting and practically shuts down immediately with a warning to check hybrid system. Please I appreciate any advice. I couldn't get the service manual to buy.
Very confused. You should be able to get a manual. Not like a Tesla. These are much more complicated than a Tesla. But Tesla have problems with other people fixing their cars. For the life of me I can't figure out why? I wish I was a very good mechanic. Internal combustion engines are just too complicated for me. Electric is the way to go.
@@steve5912 Vehicles must be as efficient as possible to get from point A to point B as efficient as possible, with the least amount of pollution, there is no need for an unnecessary loud, inefficient V8
Great Video, Thanks for posting! One question I have about the transmission's operation that I just can't wrap my head around, is - Is there any kind of physical or mechanical brake on the rotation of the MG1 (the smaller one)? That power split device looks very much like an open diff. It seems like there's a lot of opportunity for power to spill out the back of the transmission (thru MG1) when the ICE and the main motor MG2 are turning at full torque, much like when you lift one wheel of an open differential off the ground and that unloaded wheel spins up uncontrollably. How do they stop that?
+64davrecon I'm honestly not sure, but you can use a brushless motor as somewhat of a brake - you just shunt the windings all to ground and it becomes an eddy current brake, effectively. It won't completely stop the shaft, there will be some slippage, but it will bring it nearly to a halt, which is good enough in this case. If you want peak efficiency you could even put that power into charging the battery to apply reaction force to the MG1 rotor instead of just shunting it to ground.
i have a 2004 Prius i recently changed the mechanical pump on it , now the car will not start i thought it might have been the 12 volt batter but no joy , ugh i need some advise
Hi Guys, Great Vid! I have a question about how the ATF gets into and all over the internal parts: I did not see any seals to contain the ATF in the gears so I am assuming it goes all over the place in the trans too. So does the ATF get all over the electric parts too? And doesnt that make a bit of a electrical shorting hazard as the ATF gets old/carries metal dust and breaks down? I also suspect that high freq high voltage would have little problem finding an electrical path through the ATF, especially when it is full of metal dust from the gears wearing over time. Any thoughts on this? Thanks.
Enjoyed the video...very informative. Where you able to reassemble correctly...lol? It's amazing the degree of reliability Toyota has acheived with these beasts...so much stuff going on in the HSD.
So did you replace the bearing that had a gritty sound? If so did it fix the issue? I noticed something almost immediately after you split the cases, the "Chain" from the trans-axle to the final drive assembly was solid as a board! Drive chains are supposed to be loose and freely movable. Gen 2 used "Chain" drive, Gen 3 went to "Gear" drive. I bet that's why Toyota changed that design. From all the over comments doesn't look like anyone else noticed.
best engineered mass production cars in the world
Correct.
So far.
Many many thanks to both of you. I landed upon this video completely by chance (was looking for Prius inverter related videos), and I am thrilled that I did. The final bit where you put all the components together, and talked us through how MG1 and MG2 synchronize and drive the wheels either via battery power or via IC engine power was fantastic as well. I have always believed that opening up a machine is the best way to gauge quality, I think I now consider myself better informed about Toyota's hybrid drive systems thanks to this video.
Great video guys. There are a lot of so-called auto enthusiasts out there who have, for some insane reason, convinced themselves that hybrids are impossibly complex, unserviceable, frail, an affront to god, a harbinger of the apocalypse, etc. I wish I could force them all to watch your video, because from a maintenance standpoint, this is no more complicated than a conventional hydraulic automatic transmission - and as you guys mention, the Toyota HSD power-split drive is practically bulletproof. I've been in Camry Hybrid NYC taxis with 400k+ miles on them. They're incredibly durable cars.
+doctor zaius It looks SIMPLER than a conventional hydraulic automatic transmission - at least mechanically. I'm wondering about the computer control box which reads the 2 shaft speed sensors and decides when to start the engine, how much juice to give to M2 to control its speed, etc.
+Theodore Zuckerman It is. As a gearhead and embedded systems engineer, I see this video and want to go pillage priuses for fun brushless DC motor parts at the junkyard. I guess I might do that Sunday, actually...
Anyone know if the motor-generators are bathed in transmission fluid, coolant, or neither? I'm guessing ATF or air since I see no coolant deposits, but I couldn't tell for sure.
It cooled by the ATF
this video is very useful, I wish you success always and don't get bored to share your knowledge with the world, greetings from automotive from Indonesia
verry verry informitive. i was under the impression that the motor and electric motor were on a seprate drive thank you verry much for posting this video.
Nice video, the engineering in the Prius is amazing.
awesome video, the first time reveal of the heart of the Toyota hybrid system
the complexity of these hybrid cars makes you really appreciate your car.
Pretty cool teardown. I definitely appreciate what Toyota has done in terms of hybrid tech more than I ever did before.
Nice job. Amazed you guys are crawling on the floor. I'd need a chiropractor after that.
sangat bermanfaat video ini semoga sukses selalu dan tidak bosan untuk membagi edukasi ilmunya kepada dunia ,salam dari otomotif dari Indonesia
I'm just a Prius owner and looking at this device I feel like I own a seriously advanced piece of engineering. This is seriously high technology. To the un initiated it looks like it came from outer space.
Awesome video! The transmission is actually much simpler than I thought it would be.
The video has had a lot of impact on me thanks
BTW, with those lineman gloves, you are supposed to wear the accompanying leather gloves over them to protect the insulation. The rubber gloves by themselves can be easily damaged and should not be trusted with high-voltage.
this was really interesting, I wondered how they work you guys did a good job, . you hit the hight points now the unit work,I have a general idea of how it all works now thanks
Nice u r my best two amazing guys will like to hear from u again thanks to you two from a prius v owner guy
@ 15:30 another reason why it doesnt run is because its "poling" without the rear bearing being located and the air gap being small, the rotor is being pulled by the magnetic field over to the stator
20:03 hpm magnetic motors also suffer less from heat & generate less heat on start up, and also use much less intitial inductive load which keeps the heat down & lengthens the life of the motor they also weigh much less .
Thank you guys for your effort to show how that thing work..
Very educational, Thanks!
IF you are going to work on cast aluminum on the ground, lay something soft down before placing a mating surface face down. Cast aluminum gouges and scrapes easily and mating surfaces are machined. Please do not do what they did and place it directly on concrete if you run into a corroded bolt and accidently turn the whole thing you could destroy the surface causing premature failure of parts and or leaks.
And preferably hoist it onto a bench. Much easier and comfortable to work on.
Yes, great video. I really enjoyed watching this as an owner of a Lexus RX400h with basically the exact same HSD system. A few pieces of advice to go along with what Mishale said though. I definitely agree with her about the gearbox 100% but another thing. The metal tools as well should not be used on any machined mating surfaces, especially soft aluminum. No metal hammers to pop out gears either. They make hard plastic wedges and special plastic tools for that, plastic hammers to bang on the wedges and gears.
Awesome footage guys, both practical and informative and highly useful to technicians. many thanks
Very informative. Thanks guys. That was brilliant insight. Now I know my prius v a little better.
Wow the planatery gears are actually quite small. Thanks for the vid
yes , it's just good work habit to always do things properly even if it is broken. remember bad habits are easy to form while good habits hard to achieve. yes I'm guilty of typical guy thing too sometimes when I really want something done yesterday.
Thanks for the info: Love you guys
Thank you for recording the teardown :)
it is maybe like a torque converter when is spins then grabs , I just thought of that because I had one go bad at one time and that is what it does like slipping then grabbing but with a noise ,bang
Nice video guys very cool and.......... keep walking,
You guys know they make battery powered impact drivers to speed the cover removal process. Good vid.
That does make allot of sense for less eneregy is loss in inducing magnetic fields via current in the rotor as heat. Thanks!
Thank you for having such a perfect sound.
if the electric motor burns for any reason does the engine runs to get you from point A to point B?
Excellent - Very interesting.
Thank you so much.
why dont they have a table?
Thakiid101 Because they are Chinese!
because they are trained proffesionals
That was Fantastic!! Thank You!!
Awesome vid I have always been so curious what it looked like in side ...Mine is at 300K and I think it is going to my project tear down ..I think its an inverter issue so might not make to transmission ..thx guys !!
Having fun these guys
4:25 - those are inner liners , electrical gloves have 2 layers , the inner liner and outer leather ?
Great!!!! Loved the humor...very informative..
Thanks!, Jason the Tech in the Video let me know they go through extensive training on how to open these, we had the phone book sized manual sitting on the desk next to us. But being that we did not plan to put it together again, and that it was damaged in a wreck, we did the typical 'guy' thing and skipped the manual :)
Friend, what are those orange cables that are connected to the motor and what are they for and how do they work?
@@fabianolivas6782 They are connecting the motor to the inverter.
Fantastic work!
Hi you should take off the mg2 stater first before the router.
Great work guys, this is really helpful :)
Great job, really interesting to watch.
the look on the techs face was classic!
Thanks buddy
Informative
I'm amazed how small this transmission is. I wonder how much larger the coils would be on the Volt?
alternator on steriods. thanks guys never seen one apart.
thank you very much for this video, y'm french car mechanic and i will dead less 'slang' ! thanks to you.
Thanks for the video, really helpful. My Mk1 Prius has a mechanically-operated park pawl that's not engaging for whatever reason, I'm trying to figure out if it's a massive job to get it out, in case it it broken, or whether it could be the cable isn't pushing it far enough to engage.
Thanks guys, it was very useful
So all this time I thought that was a traditional CVT transmission it apparently is not that is why the last so long
Think I figured out where my transmission failed. Somewhere between the chain and planetary gearset, seeing how it can't move or charge and makes a grind. That or a bearing went and dislodged or grenaded that main set between the motors
Very educational video
The video was shot with (2) Video cameras, one was a DSLR with a max 5min record window. We did not have a camera man, so I had to run back every 5 min and restart the camera, somewhere along the line I bumped the white balance and all of the videos where blown out grrr. Next time I will have to find a camera guy to help with things :)
Past the hat around so they can buy a work bench..
Great video!! Did you guys end up doing anything with them motors?
you can probably buy a cheap VFD (variable frequency drive) on ebay that will directly drive that motor off of 120V or 220V and allow varying power and speed
9:15 when removing large panels it is best to remove the fasteners in a star pattern there is less risk of warping the item in question when doing so.
using a VFD (Variable frequency drive) $150 new ebay 1.5-2 kw .5 - 400 hz would allow a gradual ramp up in speed for testing with no load a 30 - 50 kw VFD would allow the motor to used to full power (disable power split planet gears,speed encoder, 300v to dc bus in VFD for a pure electric prius
Great video ! I was left wondering what you did with the actuator to turn it into neutral
Also the orange wires are strict when u hook them up or what is the order if I just want to make sure they are correct. I replaced the battery and tried another inverter but so far engine wouldn't turn at at. I hear a click but never turn the engine. Even when the car in ready mood. Thanks for the help. Love the video
Marvelous 👌👌👌👌👌
I am not worried about the electrons -- I want to see you put the whole dam thing back together - Can't you fix that burned winding ?? The wire is cheap ?
My Prius is at Toyota at the moment, it makes a whining noise when it gets to 60 mph. They are telling me they have to replace the whole gear box as it’s one unit. Also having problem with the Hibrid battery switch. Yet they are telling me they have to replace the battery rather than checking the cells. Feeling frustrated.
Thanks for the info,and taking the time to share it.
@TheTrueRandomness
Thank you!
I do A/V for a living so that may have helped. :) I was not able to get a camera man this time, and with one of the cameras that would only record for 5 Min at a time I had to get creative with editing haha
You must be driving a 2nd gen or earlier. My 2010 is beautiful. I love this car.
Why UR not using a impact cordless tool suitable for transmissions, I fell sleepy wile U wore ratcheting, and also nice set up on the battery station, I use to have my stereo there.
although Very Good Job . no often we're going to see this
I have a 2004 civic hybrid qirh 184000 miles never been wreaked and when I start to take off from a stop I feel like a bang like a jump into gear type noise , it does it all the time when starting from a complete stop sometimes it is an easy noise or a harder bang like jumping into gear , like a trans slip , can you give me a idea of what this may be ,
In Japan Toyota Techs work kneeling on the ground too. He must have trained in Japan!
Is there a way to seperate/remove the transmission from the output of mg1 and 2? As in... would it be possible to take an out put from the motors and hack off the housing section of the transmission to possibly weld on an adapter plate... ?
Good catch!, but with the alternator I was running about 20V AC max much safer then the 300VAC found in the Prius. so no need for the gloves here.
wow is all i can say alot of work a bit beyond my knowledge but very interesting as im always studying this type of stuff so thanks for a real neat vid the gears i understand the electrics not quite ive taken apart computer harddrives so am fimiliar with very strong mags just those little things can pinch yur fingers ouch but im pretty daring and will take apart most anything
It looks like it might have been easier if you guys put it on a midsize table or use electrical or air tools when
Dude with the short hair sounds like a fuckin' genius
isnt that the guy from the video ''Pretty drunk guy goes for more beer'' ??
Great video by the way :) i finally get to see prius taken appart
Do alot of people buy a prius because its better for the environment?? If so, what makes it so good for the environment?
My prius don't go into the mg2 gear it kicks out. No power. Do you think it's the transmission?
That was awesome! Really informative, well planned, well edited. Simply awesome.
Do you have a background in tv/related fields?
You guys are great mechanics. I did Prius inverter projects in 2010 but mainly on electrical part. Thanks for showing us what's inside a Prius motor assembly. By the way, you guys suck in electronics. Those are not AC motors. They are DC brushless motors which has to be controlled by sensing what rotor position is. The inverter fires DC pulses to the stater just a bit ahead of the rotor magnet position. If you apply AC like you did on this brushless DC motor, it will rotate forward and backward at the frequency of your AC source.
Don Zheng “by the way, you guys suck in electronics”.... and you sir just butchered the English language. Next time you berate someone, be sure to compose a sentence and or paragraph that’s beyond that of a 2nd grader...
@@nordicpride9708
You may have noticed that everything in your house and garage has been made by ppl who can't even speak your language, but who have your money. Are you proud of that?
This is like alien technology.
Hi my toyota aqua is giving me error code poa4c generator position sensor circuit range/performance
Also p0a4d generator position sensor circuit low
woul like to thank you for making this vieo though I would never own any junk technology(more than likely never) such as this , I will definatly work on them for $90hour. it is good to know different things. like this work if opportunity comes about to design better solutions or to just fix these.
Grandma wouldn't allow them to use the kitchen table so they grabbed her entertainment center. Jijiji
My prius gen 3 stopped me on the road. It give P0335. Crankshaft Position Sensor. Sensor changed, wiring harness ok, Ecu changed still the car refused to start. I thinking the mg1 has gone bad. Before the car stopped me, it was rattling and making knocking sound on at slow moving speed when the HV battery is charging only. If the Mg1 stop charging the HV battery the rattling noise stops.
Could it be my transaxle that is my problem. I thinking of buy new engine and transaxle?
Hello guys. Thanks a lot for this video. Please do you have a tear down video of the 3rd generation gearbox? I bought a brand new Prius 3rd gen. from the US and shipped to Nigeria where I live. It started rattling almost from the very beginning. Initially I thought some objects had fallen into the fans but after a careful check I found nothing outside. Prius is not sold in Nigeria and I didn't want it completely damaged by quacks.
I strongly suspect something wrong with the transaxle . I am a mechanic. I have checked inside the engine with a borescope and found nothing. I have changed the IGR and also chucked the intake manifold; both are pristine clean as the vehicle has done only 17000 miles in all. The car has been grounded for a year as the rattling got out of control and the Check Hybrid System won't let it engage the drive or neutral. It quakes heavily on starting and practically shuts down immediately with a warning to check hybrid system.
Please I appreciate any advice. I couldn't get the service manual to buy.
Very confused. You should be able to get a manual. Not like a Tesla. These are much more complicated than a Tesla. But Tesla have problems with other people fixing their cars. For the life of me I can't figure out why? I wish I was a very good mechanic. Internal combustion engines are just too complicated for me. Electric is the way to go.
You must be gay if you dont like a roaring v8.
@@steve5912 Loud, inefficient, unnecessary pollution, not worth such pain.
@@hedgehogthesonic3181 your an actual pussy dude
@@steve5912 Vehicles must be as efficient as possible to get from point A to point B as efficient as possible, with the least amount of pollution, there is no need for an unnecessary loud, inefficient V8
Great Video, Thanks for posting!
One question I have about the transmission's operation that I just can't wrap my head around, is - Is there any kind of physical or mechanical brake on the rotation of the MG1 (the smaller one)?
That power split device looks very much like an open diff.
It seems like there's a lot of opportunity for power to spill out the back of the transmission (thru MG1) when the ICE and the main motor MG2 are turning at full torque, much like when you lift one wheel of an open differential off the ground and that unloaded wheel spins up uncontrollably. How do they stop that?
+64davrecon I'm honestly not sure, but you can use a brushless motor as somewhat of a brake - you just shunt the windings all to ground and it becomes an eddy current brake, effectively. It won't completely stop the shaft, there will be some slippage, but it will bring it nearly to a halt, which is good enough in this case. If you want peak efficiency you could even put that power into charging the battery to apply reaction force to the MG1 rotor instead of just shunting it to ground.
Djdaudio what do you think caused the windings to burn? Is the rotor and stators immerse cooled in transmission fluid too?
would it help to run couple ounces high quality additive like archoil to the fluid?
i have a 2004 Prius i recently changed the mechanical pump on it , now the car will not start i thought it might have been the 12 volt batter but no joy , ugh i need some advise
Why are you working on the floor?
Can we use this to build a generator
Great job sir
Hi Guys, Great Vid! I have a question about how the ATF gets into and all over the internal parts: I did not see any seals to contain the ATF in the gears so I am assuming it goes all over the place in the trans too. So does the ATF get all over the electric parts too? And doesnt that make a bit of a electrical shorting hazard as the ATF gets old/carries metal dust and breaks down? I also suspect that high freq high voltage would have little problem finding an electrical path through the ATF, especially when it is full of metal dust from the gears wearing over time. Any thoughts on this? Thanks.
Wish the title of the video said what year/gen this was. Would save people a lot of time without having to watch to find out..
Enjoyed the video...very informative. Where you able to reassemble correctly...lol? It's amazing the degree of reliability Toyota has acheived with these beasts...so much stuff going on in the HSD.
So did you replace the bearing that had a gritty sound? If so did it fix the issue? I noticed something almost immediately after you split the cases, the "Chain" from the trans-axle to the final drive assembly was solid as a board! Drive chains are supposed to be loose and freely movable. Gen 2 used "Chain" drive, Gen 3 went to "Gear" drive. I bet that's why Toyota changed that design. From all the over comments doesn't look like anyone else noticed.