Apparatus for controlling fuel injection in stratified charge combustion engine

摘要

An improved apparatus for controlling fuel injection in an internal combustion engine is disclosed. The engine performs stratified charge combustion. A throttle valve (23) causes negative pressure to be produced in the intake duct (20). A brake booster (71) is operated by the negative pressure in the intake duct (20) to increase the braking force. When the value of the negative pressure applied to the brake booster (71) is inadequate, an ECU (30) decreases the opening of the throttle valve (23) to increase the negative pressure in the intake duct (20). The ECU (30) controls an injection valve (11) to increase amount of fuel injected from the injection valve (11) in accordance with the decrease of the opening of the throttle valve (23) for maintaining the engine speed.