What causes the suction which draws the gaseous mixture of petrol and air into the cylinder?
Answers:
The compression of the pistons. It goes up and expels the exhaust gases it goes down sucking in the mixture, that's basically it other than a few valves opening and closing and a spark to ignite the mixture and keep the whole process going.
the piston goes down - simple as that.
The piston going back down and causing a vacuum.
when the explosion occurs in the combustion chamber it burns all the oxygen and creates a vacuum a valve is then opened which sucks gas and air into the vacuum and the process starts again .
Yes the piston going down unless it's a turbo car in which case the exhaust gasses spin the turbo (basically a big fan) and the turbo forces the gas and air mix into the engine by positive pressure.
Vacuum caused by the depression of the pistons in the cylinders.
Induction.
the induction stroke of the pistons when inlet and outlet valves are closed the piston goes down and sucks petrol into the cylinder
Yes its the piston on the induction stroke so named because it induces the petrol air mix into the cylinder your question has so many correct answers you should be happy now !
Talking 4 stroke here petrol or Diesel it aint suction, it is atmospheric pressure, or in a Turbo or Supercharged engine, inlet manifold pressure, pushing the mixture through the inlet port and inlet valve into the space created by the downward movement of a piston. When downward movement of the piston ceases on the Induction stroke, the valve closes and stops the mixture being blown straight back out again.
Two strokes are plain weird, the upward movement of the piston causes a space to be created into which the mixture is pushed by atmospheric pressure and the following downward movement tries to push it back out again, unless it has reed or Disc valves, and it is the inertia of the column of gas which prevents this ejection and instead send mixture up through the transfer ports to the area above the piston where it is burned to produce power
magical miniature monkeys
the piston going down the bore
this is the induction stroke
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