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. Regulated gas distribution phase mechanism has the possibility of regulating the setting of inlet valve closing moment. Variable compression degree mechanism has the possibility of changing mechanical compression degree. At negative pressure in ICE inlet valve, which is lower than the required negative pressure, throttle valve opening degree is set to lower value. At lower throttle valve opening degree in the inlet valve there shall be set the required negative pressure or bigger negative pressure. At setting of the required or bigger negative pressure in inlet valve the setting of closing moment of inlet valve shifts in the direction close to lower inlet dead-point. Volume of intake air, which corresponds to the engine load, is supplied to combustion chamber in compliance with throttle valve opening degree. At that, mechanical compression degree is set to lower value in order to reduce the pressure at the end of compression.

EFFECT: providing the possibility of creating big negative pressure in inlet engine channel during ICE operation at low loads.

10 cl, 13 dwg