INTERNAL COMBUSTION ENGINE WITH SPARK IGNITION Russian patent published in 2011 - IPC F02D41/04 F02D15/00 F02D13/02 F02D9/02 

FIELD: engines and pumps.

SUBSTANCE: internal combustion engine (ICE) with spark ignition includes regulated gas distribution phase mechanism, variable compression degree mechanism and throttle valve. Throttle valve is arranged in inlet ICE channel. When ICE load decreases from high to low, the closing moment of inlet valve is moved in the direction from lower dead inlet point. At low load operation of the engine the mechanical compression degree is kept maximum. At high load operation of the engine, the mechanical compression degree increases when the engine load becomes lower; at that, actual compression degree remains constant. Pre-determined load is set within the range of load where mechanical compression degree is kept maximum. Throttle valve is retained in fully opened state in the area between high and pre-determined (L₂) loads. When engine load becomes lower, the opening degree of throttle valve becomes lower and opening moment of inlet valve moves in the direction from upper dead inlet point. In the load area, where mechanical compression degree is kept maximum, actual compression degree becomes lower when the engine load decreases.

EFFECT: improving combustion process allowing to obtain high thermal efficiency.

2 cl, 11 dwg