Engine starting and stopping..

@cshmech-n9Q7y1 • Oct 25, 2024

Oct 25, 2024

1.3K

I have a basic(silly!!) doubt about it.. When an ic engine(say 4 stroke) stops, it may stop at any position. When an engine is started, fuel supply and spark is given. But how its possible that it starts to run again in the same direction(CW-CCW)??
I mean, it should run in the same direction, but whats the mechanism which makes sure that engine runs in the same direction??

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Fahad Bhatti

@fahad-bhatti-SN0245 • Oct 2, 2008

hi buddy!
In cars there's a starting motor which drives the engine initially and is responsible for the direction of engine's movement. The terminals of the motor are connected to the fixed terminals of a battery which makes sure that direction of rotation is always the same.
Thus every time the car starts , the motor gives the initial rotations and gives these in the same particular direction.

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cshmech

@cshmech-n9Q7y1 • Oct 3, 2008

thanx Buddy(Bhatti)😁...

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flash319

@flash319-sIdiFX • Dec 20, 2008

Also the spark is advanced of TDC therefore if it were to start backwards it would not run because the spark would be behind TDC.

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Raghavendra.RSP

@raghavendrarsp-EkDF17 • Dec 27, 2008

Hi, at first i had this same doubt, but i heared that angles between the connecting rods of pistons, and the crank shaft will make the engine to run in only one direction, is this correct! i think its only by starting motor.

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