In which step of the four-stroke engine cycle does the car release co2, h2o, and co?

The four-stroke engine cycle is an important aspect of the automobiles that uses gasoline or diesel as fuel. In this cycle compression, exhaustion and contraction are involved. The step that produces CO2, H20 and CO is the step after which the fuel-air mixture is introduced simultaneously when the piston is moving to the bottom. Upon the compression of the piston (going up), the spark plug is ignited making the products mentioned.

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