this is an accurate description of the ignition system, at least for all I have ever studied it over the years. Reading comments proved entertaining and as usual I come away realizing this subject, though pretty straight forward, causes more confusion than any other topic of automotive mechanics. For the record to those with other ideas, the condenser is not providing just an "extra" benefit of preventing points arcing, it is essential in so doing. A system will run without a condenser but the performance will be erratic with secondary voltage values wandering all over the place and the points will be a real lightning show. The points do not hold up to this. The condenser is an electrical storage device, pure and simple, where it is used and how it is used determines what it actually accomplishes. In this case the condenser is a remote storage device to accumulate/absorb electrical charge when the points open, if it is not there then the primary coil winding voltage will back feed to ground or some other lower voltage circuit, hence the points burning. As the points open and the coil primary field collapses the condenser assures that all the power stored up in the primary is retained in order to follow through to the secondary coil circuit. This happens because the condenser is blocking the backward flow of electricity from the primary winding of the coil due to it having higher voltage than the collapsing coil primary field. When the coil primary field discharges to a certain level of voltage the condenser then releases its charge into the coil to finish the job of secondary voltage generation, kind of a boost so to speak. So in this particular installation the condenser is acting as a storage device and a resistor to prevent backflow of electricity. And it is worth noting that this video is talking about a resistor in the coil, not referencing the ballast resistor in the ignition primary circuit. So there are then two resistors, one in the coil to protect coil overload and the ballast or nichrome wire ignition resistor that is there to keep the voltage to the points low enough to prevent points burnout. The ignition resistor it is in circuit when normal ignition is in effect but it is bypassed when the circuit is in the starting mode in order to achieve a higher starting secondary voltage.
As per usual, the writers of auto-ignition systems make the same mistake regarding the purpose of the capacitor across the points. Its initial purpose is to provide a RAPID collapse of the back EMF of the collapsing field, by providing a capacitor this enables the current to be quickly absorbed. The explanation is this.....the rule of induction is, that the faster the field collapses the higher the output voltage will be, THE MAIN PURPOSE OF THE CAPACITOR IS to quickly assist the field's collapse. The fact that this capacitor also HAPPENS to sufficiently reduce the erosion of the points is just a lucky coincidence. Remove the capacitor and the ignition fails to provide sufficient spark to run the engine.
You're right. I am pulsing an ignition coil electronically with a MOSFET, and it is sufficient for generating high-voltage output due to its very fast turn-off. I have tried placing a capacitor across the transistor - no joy.
The resistor ballast is not to keep the coil from getting too hot. It brings down the voltage, when you crank the engine there is a wire that gives the coil battery voltage bypassing the ballast to increase spark voltage, for better engine starting.
@@jakefriesenjake Pre 1955 cars used 6V electrical systems and didn't require a ballast resister on the primary side of the ignition system. In 1955 the auto industry switched to 12V electrical systems. This increase in voltage reduced the life of the breaker points which caused them to fail prematurely. The breaker points job is to allow battery voltage to charge the primary side of the ignition coil and once the coil is charged, the points open stopping the circuits path to ground. The electrical charge in the primary side of the coil then seeks a path to ground and that is through the secondary side of the ignition coil and eventually to the spark plug. This charging of the primary side of the ignition coil is controlled by the breaker point gap and thus the ignition dwell (30 degrees for an 8 cyl engine). So rough numbers, 6V into the primary side of the ignition coil and 20K V out to the spark plug. Over the years improvements have been made and some engines have 100K V passing through the spark plugs. Also, old style ignition coils like the one in this video are oil cooled to prevent overheating. Hope this helps.
@@jakefriesenjake As far as I know, the coil is designed for 10V +/-2V. The battery voltage drops to 8V-10V during starter cranks, so the resistor must be bypassed by wire to compensate for the voltage drop. In normal condition, resistor compensate 13.5V to 11.5V
Another nice video, which is almost correct. Except for one thing. The other end of the secondary coil can't be connected to the primary coil T1:55 like on your diagram, as the contact breaker would cut ground to both coils at the same time, and the secondary coil couldn't deliver 20 000 V to the spark plug as the other end of the spark plug is connected to ground. The other end of the secondary coil MUST BE PERMANENTLY CONNECTED TO THE GROUND instead to the primary coil. Anyway, over all, good video, buddy ;-)
Though ur theory part was taken from Ganesan book but the way of explaining it with such a good fig which is not in the book, helped me to understand it very clearly. Thank u very much.
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Great video here! One thing i noticed is that the moveable arm of the contact point or contact breaker should be the one connected to the input wire from the ignition coil, and the fix arm, or the body of the contact breaker is the one grounded to the base of the plate.
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Hi, I have a question about the video. at 4:35 you say that the condenser is charged with a voltage much higher than the battery voltage. I like to understand why the voltage is already higher than battery voltage at this moment. Why is this happening, and why is this higher voltage coming from the primary coil? I hope you like to make this clear for me? Regards, Arthur
The condenser is a capacitor. It stores current. It starts off by absorbing extra current during the collapse of the breaker circuit when the contact breakers open. When this absorbed current produces a voltage that exceeds the battery voltage (12v) the battery stops providing current. When the battery stops providing current, the condenser discharges back into it- reversing the flow of current back to the coil LT winding - reversing the magnetic field and generating a HT voltage out of the coil's secondary winding and central electrode.
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There is a flaw in the system drawing, the fixed contact is grounded, so it can't be connected to the coil, the movable contact is the one that connects to the coil. And not all ignition systems have a resistor ballast.
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TO FURTHER CLARIFY...One of the laws of magnetic induction is that the output voltage of the secondary winding is dependant on how quickly the primary field collapses. If you took an auto ignition coil and applied 12 volts AC at 50 cycles the output from the secondary would be surprisingly small, because the rate of the applied current is relatively slowly building up and diminishing at only one fiftieth of a second, but apply an instant 12 volts into the primary, and provide a fast path for the collapsing field current to follow, and enter the capacitor, which quickly sucks up the energy, and the output will be dramatically increased. Then the points shut, which discharges the capacitor, ready for the next cycle. [ modern ignition systems are way out of my depth as I come from way back in history ]. Read more Reply
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"led" like "red" (lead the metal), not "lead" like bead ("lead"er of the pack). The "ignition harness" is the collection of ignition wires, not individual wires.
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The distributor's function is to switch contact from one spark plug to another. The contact breaker is needed to interrupt current to the primary winding. After the interruption, its field collapses, inducing a lower current, higher voltage into the secondary winding. The contact breaker has to break contact right after the distributor established a connection to one spark plug. This system has to be fine tuned in order to work correctly.
@@soupflood The contact breaker has to break contact right after the distributor established a connection to one spark plug. Really? The distributor switch 20 000V but contact breaker cut off 12V sorry bud you wrong.
@@honzahanes484 If you'll ever open a distributor, you'll notice that, in the upper part, it has an arm which rotates at half the speed of the crankshaft. That's where your 20000 volts jump the millimeter air gap to the cap contacts, which connect to the sparkplug wire. Underneath that, you'll find a switch which is called points. It interrupts the 12V primary side of the ignition coil. After that switch cuts off the 12V coil, it induces 20000V into the secondary side of the ignition coil. The ignition coil has a 12V coil and a 20000V coil. In the engines made after the 90's, those points were replaced with Ignition Control Modules which use a field effect sensor (typically a coil and magnets) and transistors to switch on and off the primary side of the ignition coil. Tell me if you found an error again.
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When installing on old cars 3 capacitors on the aspirator, there is no strong spark on the spacers, but when installing on the spacecraft, the spark comes out, but if 3 capacitors are installed on each side of the car, it does not work. What is the reason? Thank you.
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CDI ignitions are generally not used on automobiles due to cost and because they tend to work best at higher rpm. Modern coil design allow inductive systems to generate proper voltage at high rpm where in the past this was difficult to accomplish.
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Pratham Singh If I'm understood well, the cam, which is connected to the camshaft, switches the contact breakers as the cam turns, discharging the capacitor due to the break in primary winding's current. It induces a magnetic field in the secondary winding, and the rest the video covers very well. The capacitor is charged by absorbing the EMF(Eletromotriz force) from the magnetic field of the primary winding. I hope I could help you... English is not my first language.
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The presence of the points capacitor is vital to the function of the car ignition due to the fact that the RATE OF THE PRIMARY FIELD COLLAPSE governs the output secondary voltage..... without this capacitor, or if it becomes open circuited.the engine will stop, or only Idle. This capacitor gives the back EMF from the collapsing primary field somewhere to quickly flow to. It ensures a high rate of field collapse, ensuring a high output voltage. The fact that it also stops points arcing and burning out in time, is just a happy coincidence. Read more
its not normal to have current flow across the points all the points do is lift the gd off the condenser lead so current flows thru condenser to gd if condenser is wrong value mfd ( it must match the primarry coil ) or if its defective the voltage can not go thru so it jumps the open points and pits them overtime
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this is an accurate description of the ignition system, at least for all I have ever studied it over the years. Reading comments proved entertaining and as usual I come away realizing this subject, though pretty straight forward, causes more confusion than any other topic of automotive mechanics. For the record to those with other ideas, the condenser is not providing just an "extra" benefit of preventing points arcing, it is essential in so doing. A system will run without a condenser but the performance will be erratic with secondary voltage values wandering all over the place and the points will be a real lightning show. The points do not hold up to this. The condenser is an electrical storage device, pure and simple, where it is used and how it is used determines what it actually accomplishes. In this case the condenser is a remote storage device to accumulate/absorb electrical charge when the points open, if it is not there then the primary coil winding voltage will back feed to ground or some other lower voltage circuit, hence the points burning. As the points open and the coil primary field collapses the condenser assures that all the power stored up in the primary is retained in order to follow through to the secondary coil circuit. This happens because the condenser is blocking the backward flow of electricity from the primary winding of the coil due to it having higher voltage than the collapsing coil primary field. When the coil primary field discharges to a certain level of voltage the condenser then releases its charge into the coil to finish the job of secondary voltage generation, kind of a boost so to speak. So in this particular installation the condenser is acting as a storage device and a resistor to prevent backflow of electricity. And it is worth noting that this video is talking about a resistor in the coil, not referencing the ballast resistor in the ignition primary circuit. So there are then two resistors, one in the coil to protect coil overload and the ballast or nichrome wire ignition resistor that is there to keep the voltage to the points low enough to prevent points burnout. The ignition resistor it is in circuit when normal ignition is in effect but it is bypassed when the circuit is in the starting mode in order to achieve a higher starting secondary voltage.
hi i don't understand about the current flow trough the contact braker to the body, i mean can we joint the + and -
As per usual, the writers of auto-ignition systems make the same mistake regarding the purpose of the capacitor across the points. Its initial purpose is to provide a RAPID collapse of the back EMF of the collapsing field, by providing a capacitor this enables the current to be quickly absorbed. The explanation is this.....the rule of induction is, that the faster the field collapses the higher the output voltage will be, THE MAIN PURPOSE OF THE CAPACITOR IS to quickly assist the field's collapse. The fact that this capacitor also HAPPENS to sufficiently reduce the erosion of the points is just a lucky coincidence. Remove the capacitor and the ignition fails to provide sufficient spark to run the engine.
You're right. I am pulsing an ignition coil electronically with a MOSFET, and it is sufficient for generating high-voltage output due to its very fast turn-off.
I have tried placing a capacitor across the transistor - no joy.
The resistor ballast is not to keep the coil from getting too hot. It brings down the voltage, when you crank the engine there is a wire that gives the coil battery voltage bypassing the ballast to increase spark voltage, for better engine starting.
Yes that is true, so why not just remove the resistor? Because the coil will overheat!
@@jakefriesenjake Pre 1955 cars used 6V electrical systems and didn't require a ballast resister on the primary side of the ignition system. In 1955 the auto industry switched to 12V electrical systems. This increase in voltage reduced the life of the breaker points which caused them to fail prematurely. The breaker points job is to allow battery voltage to charge the primary side of the ignition coil and once the coil is charged, the points open stopping the circuits path to ground. The electrical charge in the primary side of the coil then seeks a path to ground and that is through the secondary side of the ignition coil and eventually to the spark plug. This charging of the primary side of the ignition coil is controlled by the breaker point gap and thus the ignition dwell (30 degrees for an 8 cyl engine). So rough numbers, 6V into the primary side of the ignition coil and 20K V out to the spark plug. Over the years improvements have been made and some engines have 100K V passing through the spark plugs. Also, old style ignition coils like the one in this video are oil cooled to prevent overheating. Hope this helps.
EXACTLY !!
@@jakefriesenjake As far as I know, the coil is designed for 10V +/-2V. The battery voltage drops to 8V-10V during starter cranks, so the resistor must be bypassed by wire to compensate for the voltage drop. In normal condition, resistor compensate 13.5V to 11.5V
Incorrect.
Listening to this is much better than paying attention in my classes😴
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Nice , god bless you
Hi 👋bro
Amazing illustration there!
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Another nice video, which is almost correct. Except for one thing. The other end of the secondary coil can't be connected to the primary coil T1:55 like on your diagram, as the contact breaker would cut ground to both coils at the same time, and the secondary coil couldn't deliver 20 000 V to the spark plug as the other end of the spark plug is connected to ground. The other end of the secondary coil MUST BE PERMANENTLY CONNECTED TO THE GROUND instead to the primary coil. Anyway, over all, good video, buddy ;-)
The best explanation I have seen. Thank you
Though ur theory part was taken from Ganesan book but the way of explaining it with such a good fig which is not in the book, helped me to understand it very clearly. Thank u very much.
nee poda inak enna ariyuaa inak malayalam ariyuva .....inj aranna inte vicharam
This video helped me alot in my exam.
Thank you so much sir 🙏
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One of the most useful video for me...
Good job team..👍👍
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Well explained 👏
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Very nice video sir.
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thank you!👍😲!! immensely helpful
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Good teachings
Thank you Sir
Thanks sir it is hopefully useful in 2021 also
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Amazing Battery ignition system 👌👌🌟🌟⭐⭐⭐
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Fantastic explaination
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Alternators are used in modern cars now and have been for many years, not dynamos any more as the video states.
Very clear and important video.Thanks very much!
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Superb explanation I can understand perfectly
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Can u explain about spark plug
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I worked in this animation company about 4 years, good company
Please how do I start in the animation company
@@chideranebo8001 this company is closed now
Very brilliant Explanation Sir..i really got a working and function of each of parts of battery ignition system..
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Good concept 👌👌✍️✍️
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Awesome video.nicely covered topic
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Thank you very much .you help my with your videos to fix my car. apricieted Happy Thank's Given....
Very Nice explanation 👍 it's too much helpful video
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Very good explanation
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Thanks Again Great Video
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magic Work never lets me down
Thanks that's amazing great video channel I like it nice ideas
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Great video here! One thing i noticed is that the moveable arm of the contact point or contact breaker should be the one connected to the input wire from the ignition coil, and the fix arm, or the body of the contact breaker is the one grounded to the base of the plate.
He must be talking about a vehicle with a positive earth perhaps.
well explained, plus a good animation.
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Are this battery ignition switch are also connected car radio ?
Does a bad coil cause a boot to be messed up to where it slips out or off the plug when trying to screw the coil back in.
Hi,
I have a question about the video. at 4:35 you say that the condenser is charged with a voltage much higher than the battery voltage.
I like to understand why the voltage is already higher than battery voltage at this moment.
Why is this happening, and why is this higher voltage coming from the primary coil?
I hope you like to make this clear for me?
Regards,
Arthur
The condenser is a capacitor. It stores current. It starts off by absorbing extra current during the collapse of the breaker circuit when the contact breakers open. When this absorbed current produces a voltage that exceeds the battery voltage (12v) the battery stops providing current. When the battery stops providing current, the condenser discharges back into it- reversing the flow of current back to the coil LT winding - reversing the magnetic field and generating a HT voltage out of the coil's secondary winding and central electrode.
The collapse of the magnetic field, in the primary winding, creates a voltage spike of 200 to 300 volts.
Tnx sir
very usefull video.
plz Make a video about Air starting system of engine.
All the best
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There is a flaw in the system drawing, the fixed contact is grounded, so it can't be connected to the coil, the movable contact is the one that connects to the coil. And not all ignition systems have a resistor ballast.
absolutely right.
but he might be explaining a positive earth system as in American cars?
Verigood Hadersand thank you sir
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Nice sir easy to understand Keep it up
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TO FURTHER CLARIFY...One of the laws of magnetic induction is that the output voltage of the secondary winding is dependant on how quickly the primary field collapses. If you took an auto ignition coil and applied 12 volts AC at 50 cycles the output from the secondary would be surprisingly small, because the rate of the applied current is relatively slowly building up and diminishing at only one fiftieth of a second, but apply an instant 12 volts into the primary, and provide a fast path for the collapsing field current to follow, and enter the capacitor, which quickly sucks up the energy, and the output will be dramatically increased. Then the points shut, which discharges the capacitor, ready for the next cycle. [ modern ignition systems are way out of my depth as I come from way back in history ].
Read more
Reply
Why one positive wire of a secondary coil and not two ends positive and Negative secondary coil
@@maniac2315 it's just grounded. "the same ground that the spark plug uses"
it saves a wire.
Excellent explanation.
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"led" like "red" (lead the metal), not "lead" like bead ("lead"er of the pack). The "ignition harness" is the collection of ignition wires, not individual wires.
VERY HELPFULL.. THANK YOU SO MUCH .. KEEP UP THIS GOOD WORK..
Hello thank you for your valuable knowledge share to us.hope u make tutorials related to gasoline engine sensors.
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Very Nice Work .. Thanks
16 mar 2022 3:34 am edt(utc-4):thanks
16 mar 2022 4:22 am edt(utc-4): 3:00 camshaft must have been meaning intake-camshaft , not exhaust-camshaft
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Thanks for better explanation :)
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Very nicely explained.. thank you
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Magic Marks Can we get a video on magneto ignition system as well
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Question: Why would you need a contact breaker if the distributor would cut off voltage?
The distributor's function is to switch contact from one spark plug to another.
The contact breaker is needed to interrupt current to the primary winding. After the interruption, its field collapses, inducing a lower current, higher voltage into the secondary winding.
The contact breaker has to break contact right after the distributor established a connection to one spark plug. This system has to be fine tuned in order to work correctly.
@@soupflood Okay, thank you!
@@soupflood The contact breaker has to break contact right after the distributor established a connection to one spark plug.
Really? The distributor switch 20 000V but contact breaker cut off 12V sorry bud you wrong.
@@honzahanes484
If you'll ever open a distributor, you'll notice that, in the upper part, it has an arm which rotates at half the speed of the crankshaft. That's where your 20000 volts jump the millimeter air gap to the cap contacts, which connect to the sparkplug wire.
Underneath that, you'll find a switch which is called points. It interrupts the 12V primary side of the ignition coil. After that switch cuts off the 12V coil, it induces 20000V into the secondary side of the ignition coil. The ignition coil has a 12V coil and a 20000V coil.
In the engines made after the 90's, those points were replaced with Ignition Control Modules which use a field effect sensor (typically a coil and magnets) and transistors to switch on and off the primary side of the ignition coil.
Tell me if you found an error again.
its helpful to every one, some more mechanic videos???
Very well explained , Nice. One quick question what will happen to other devices if battery is low and still if we try to give ignition continuously
explanation is upto the mark ........
thank you :)
not quite
Very nice explain
Can you please help me I need CDI circuit diagram for bike thanks a lot
Explanation super
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When installing on old cars 3 capacitors on the aspirator, there is no strong spark on the spacers, but when installing on the spacecraft, the spark comes out, but if 3 capacitors are installed on each side of the car, it does not work. What is the reason? Thank you.
Best ever👍👍👍👍
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Can you go over the Chrysler electronic ignition system?
best explanation
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THanks for making this video..
I Hope you can make a lot of video about a Automotive..
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have a question. If you feed the coil with 12 V continuously (DC), how long can the current flow without damaging the coil's primary?
Who knows. But when the coils primary winding go bad, you'll know. So, just turn off the ignition when not using the engine.
Liked it very much
Make more mechanical videos
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Very nice explanation..
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Can you explain how does the cam rotates
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Thank You...great work
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Thank you herr Strauss
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Great lecture
Thanks, brent Declaro.
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wonderful explanation....
how to check the condenser is works good?
amazing explantion..very clear
Can you please tell me that in which engines the inductive indiced discharge is used?
Because nowadays mostly CDI is used
CDI ignitions are generally not used on automobiles due to cost and because they tend to work best at higher rpm. Modern coil design allow inductive systems to generate proper voltage at high rpm where in the past this was difficult to accomplish.
Could u please explain magneto ignition system
Superb
Thanks for the information
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Very well explained. Thanks!
Awesome video
thank you very much it helps me a lot.
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there was animation related to stages of combustion in CI and SI engine but i couldn't find it now.
plz explain transistorised assisted contact system and capacitor discharge ignition systems
great keep up good work
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sir,
do you have the notes about the essential parts?
i lked your explanation
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"oh shit here we go again"
Super sir and thank u so much
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Thanks a lot.
Please shard with us how to make this video??
Please tell as y bike goes reverse or back . please urgent expert answer
And that was ignition system explained by the monopoly guy
what was the whole point of contact breaker along with the capacitor? how is it helping in any way?
Pratham Singh If I'm understood well, the cam, which is connected to the camshaft, switches the contact breakers as the cam turns, discharging the capacitor due to the break in primary winding's current. It induces a magnetic field in the secondary winding, and the rest the video covers very well.
The capacitor is charged by absorbing the EMF(Eletromotriz force) from the magnetic field of the primary winding.
I hope I could help you... English is not my first language.
Guilherme Rodrigues thanks :)
Nice video.......
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Excellent
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Tank you good work i like.
Thanks sir.But how current jumps from rotor end to metallic electrodes?
Muluneh Getnet
Gap ionization. The same way spark plugs' central electrodes connect with the ground electrode.
in actual wiring diagram, the distributor has two wires,each wire connected to the secondary of coil of the ignition,,why is that?
That's cool.thanks
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Thank you
The presence of the points capacitor is vital to the function of the car ignition due to the fact that the RATE OF THE PRIMARY FIELD COLLAPSE governs the output secondary voltage..... without this capacitor, or if it becomes open circuited.the engine will stop, or only Idle. This capacitor gives the back EMF from the collapsing primary field somewhere to quickly flow to. It ensures a high rate of field collapse, ensuring a high output voltage.
The fact that it also stops points arcing and burning out in time, is just a happy coincidence.
Read more
its not normal to have current flow across the points all the points do is lift the gd off the condenser lead so current flows thru condenser to gd if condenser is wrong value mfd ( it must match the primarry coil ) or if its defective the voltage can not go thru so it jumps the open points and pits them overtime
ok sir
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Is the high voltage a.c. or dc
One hill of a lesson thaaaankx xd
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