Injection timing controller for electronic fuel injection device

Abstract

Abstract PURPOSE:To improve drivability ever so better, by quickening an injection start in time of low load but making the injection start slow in proportion to an increase in the load, in case of a system which independently performs the fuel injection with such timing as corresponding to the valve on-off timing at every cylinder at less than the specified engine speed. CONSTITUTION:In time of operating an engine 7, an injector 8 is controlled at a control unit 4 on the basis of each output signal out of a crank angle sensor 13 and an air flow meter 5 so as to make it perform the injection of fuel at every cylinder at the injection start timing commensurate to a load condition at less than the specified engine speed. And, making a top dead point after ignition a criterion, the injection is quickly started in time of low load, while dwell time is made longer till a suction stroke starts because of the injection time being shortened. In time of high load, the injection is slowly started, and as the injection time is long, the dwell time is shortened to a state of being almost nothing. With this constitution, not only a stable combustion state is secured but also favorable accelerating performance is securable.

Inventors

• 👤 Ichiro Kudo
• 👤 一郎 工藤

Bibliographic Details