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A stroke is the action of a piston travelling the full length of its cylinder.In a two-stroke engine, one of the two strokes combines primarily the intake stroke and the combustion stroke, while the other stroke primarily combines the compression stroke and the exhaust stroke, though technically since both ports are exposed during both the combustion and compression strokes, some reversion ...
The design using exhaust valve(s) is common in on-road, off-road, and stationary two-stroke engines (Detroit Diesel), certain small marine two-stroke engines (Gray Marine Motor Company, which adapted the Detroit Diesel Series 71 for marine use), certain railroad two-stroke diesel locomotives (Electro-Motive Diesel) and large marine two-stroke ...
When the transfer is complete, the piston is on the compression stroke but the exhaust port is still open, an unavoidable problem with the two stroke piston port design. To help prevent the piston pushing fresh mixture out the open exhaust port the strong acoustic wave (produced by the combustion) from the expansion chamber is timed to arrive ...
The power stroke begins at TDC ([0°]; injection of fuel leads TDC by 4° [356°], such that injection of fuel will be completed by TDC or very shortly thereafter; [citation needed] the fuel ignites as fast as it is injected), after the power stroke the exhaust valves are opened, thereby greatly reducing combustion gas pressure and temperature ...
This method requires that the exhaust pipe is long enough to contain the gas slug for the entire duration of the stroke. As the Crossley engine was so slow-revving, this resulted in an exhaust pipe with a length of 65 feet (20 m) between the engine and its cast-iron 'pot' silencer. [2]
The induction stroke is the first phase in a four-stroke (e.g. Otto cycle or Diesel cycle) engine.It involves the downward movement of the piston, creating a partial vacuum that draws an air-fuel mixture (or air alone, in the case of a direct injection engine) into the combustion chamber.
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