IC engine with low emission of nitrogen oxide and hydrocarbon(s) - has large precombustion chamber with controlled initiation of fuel injection

摘要

The low-emission IC compression ignition engine has a pre-combustion chamber communicating with the cylinder near the top. Low emissions of NOx are achieved by constructing the pre-combustion chamber to have a volume of between 70% and 85% of the combined pre-chamber and main combustion chamber volume when the piston is at top dead centre, and by variably controlling the initiation of fuel injection into the pre-combustion chamber. Initiation of fuel injection occurs between 5 deg. crank angle before TDC and 20 deg. crank angle after TDC.