On the compression stroke of the piston, the fresh air is forced through the narrow neck and into the vapouriser.
12.
In the diesel engine, the ECU meters the fuel through the injectors into the engines cylinders during the compression stroke.
13.
The compression stroke involved the two pistons approaching each other, and then the ignition stroke was subsequently triggered between them.
14.
At about the top of the compression stroke, fuel is injected directly into the compressed air in the combustion chamber.
15.
In a reed valve engine the valve is drawn open by suction as the piston moves upward on the compression stroke.
16.
Vigorous ignition takes place only when sufficient oxygen is supplied to the hot-bulb chamber on the compression stroke of the engine.
17.
As these were gas engines they did not require much compression or a long period of valve closure during the compression stroke.
18.
In the petrol engine, air and fuel are mixed for the entire compression stroke, ensuring complete mixing even at higher engine speeds.
19.
Hesselman engines use the ultra lean-burn principle; fuel is injected toward the end of the compression stroke, then ignited with a spark plug.
20.
As the charge compression was carried out by the more powerful first compression stroke, a higher compression ratio was achieved, giving better efficiency.
