Patent ID: 6722341
Filing Date: 2004-04-20
Classification: F02B,F02D,Y02T

Abstract:
A fuel injection control system of a two-cycle in-cylinder direct injection engine, which controls the injection of fuel from an injector of the two-cycle in-cylinder direct injection engine having a combustion chamber, a scavenging port and an exhaust port which are opened in said combustion chamber and are opened and closed by a piston moving vertically in said combustion chamber, the injector installed so that a fuel injection port is opened in said combustion chamber, and a crankshaft connected to said piston, comprising:low-speed time injection control means to control the injection of fuel from the injector so that, in a low-speed area in which the rotational speed of said engine takes a value not higher than a set value, the fuel injection from said injector is started after the scavenging port of said engine has been closed, and the injection of all fuel is finished during the time when said exhaust port is opened; and middle and high-speed time injection control means to control the injection of fuel from the injector so that, in a middle and high-speed area in which the rotational speed of said engine takes a value exceeding said set value, fuel is injected even for a period of time deviated from the period between the timing of closure of said scavenging port and the timing of closure of said exhaust port to secure the injection time required by said engine.