we have read that when the piston goes up and down then the
engine works i.e. the suction,compression etc etc.
then what happens in the case of big vehicles, which start
at stable condition, i.e. how does their piston moves when
they are at rest.
how suction,compression etc

Answer Posted / yogesh

in big vehicle we talk petrol engine.
first air and fuel are suck in cylinder and ompressed the piston.

in diesel engine.
first air suck in cylinder and in second stroke inject the fuel by fuel injector.

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