Pneumatically controlled compressed air assisted fuel injection system

摘要

A two-stroke internal combustion engine having a compressed air assisted fuel injection system (22). The injection system (22) has an accumulator (34) that uses scavenged air from the crankcase (18) as the compressed air source. The injection system (22) has a valve (42) connected to an exit from the accumulator (34). The valve (42) is connected to a diaphragm (44) with two diaphragm pressure chambers (48,50) on opposite sides of the diaphragm (44). Both diaphragm pressure chambers (48,50) are connected to pressure in the crankcase (18); one of the diaphragm pressure chambers (48,50) by a flow restrictor (56).