i) Induction stroke
? The piston moves downwards in cylinder
? This causes a partial vacuum on the upper part of the cylinder
? The partial vacuum causes the inlet valve to open
? The open inlet valve sucks in fuel and air mixture into the cylinder
? The exhaust valve remain closed
ii) Compression stroke
? The inlet and outlet valves remain closed
? The piston moves up the cylinder
? The air-fuel mixture is compressed in the cylinder
iii) Power/ignition stroke
? The piston reaches the uppermost portion of the cylinder (top dead centre)
? The air-fuel mixture is fully compressed.
? The spark plug produces a spark
? The spark ignites the air-fuel mixture
? The ignited mixture expands, the expansion creates pressure that forces the piston downward thus generating power
iv) Exhaust stroke
? The piston moves up the cylinder
? The exhaust valve opens
? Exhaust gases are forced o
john3 answered the question on January 22, 2018 at 10:28
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