INTERNAL COMBUSTION ENGINE WITH SPARK IGNITION Russian patent published in 2011 - IPC F02D13/02 F02D15/00 F02D41/04 F02D43/00 

FIELD: engines and pumps.

SUBSTANCE: internal combustion engine (ICE) includes variable compression degree mechanism and gas distribution phase control mechanism. Variable compression degree mechanism has the possibility of changing mechanical compression degree. Gas distribution phase control mechanism has the possibility of controlling the inlet valve closing moment. During ICE operation at low load the mechanical compression degree is higher than that during operation at high load. At load increase the mechanical compression degree decreases gradually. At ICE operation the first and the second air-fuel ratios are performed randomly; at that, the second ratio is bigger than the first one. At ICE operation at high load the first air-fuel ratio is performed. At ICE operation at low load, when mechanical compression degree is lower than the pre-defined reference value, combustion is carried out with the first air-fuel ratio, and when mechanical compression degree is higher than reference value, combustion is carried out with the second ratio.

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

5 cl, 17 dwg