Engine control unit-ECU

449

05:34:48

This is a crude version of an ECU using 555timer circuit to control the spark plugs, the LED's represent individual cylinder spark plugs in a V8 engine. Decrease capacitance of the first capacitor to speed up the engine, have fun!

published 10 years ago

jsmith13126

10 years ago

Most ignition systems have a ignition switched power to the ignition coil and the computer controls ground. If you created a circuit that pulses ground you could make this work using 8 individual coils.

Sine_eyed

10 years ago

Engines don't lite four cylinders at a time though...

Aditya07

10 years ago

Its a V8, lights up 2cylinders in each line at a time. Don't v8's work like that?

flowDAQ

10 years ago

https://m.youtube.com/watch?v=NBxgDbvoeqE

Sine_eyed

10 years ago

Nice vid @flowDAQ- clear and concise, thank you..

hurz

10 years ago

The sequence is more like a random one. Its spread around the block to avoid resonances. Suppose you would fire form left to right, you would have a big wave of mass moving and cause a shaking motor.

Sine_eyed

10 years ago

Exactly. The purpose of offsetting the firing of cylinders is to keep the engine in relative balance. If this wasn't done, the force generated by the motion of the pistons would shake the motor right off the chassis! Perhaps violently so..

Aditya07

10 years ago

Missing the point people.

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