Control method and apparatus for fuel injection

Abstract

Abstract PURPOSE: To control the air-fuel ratio to a constant level under all of the running conditions of an engine. CONSTITUTION: A compensating injection pulse width t 5 corresponding to the differentiated value G of a suction pressure is calculated until the differentiated value G reaches its peak value V p . If the peak is detected by judging the differentiated value at a step 50, a preset pulse width t 6 is subtracted from the compensating injection pulse width t 5p corresponding to the peak value V p thereby to obtain a pluse width t 7 . After a pulse width t 7 is calculated at the step 52, the width t 6 is added in a preset quantity at a step 53 so as to accomplish the calculation at the subsequent step 52. After the differentiated value G reaches the peak value V p at the two steps 52 and 53, it is to possible to obtain the pulses t 7 which are reduced at a preset rate. The pulses width t 5 or t 7 which is calculated at the steps 51 to 53 is compensated with the r.p.m. of the engine at a step 54 COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Keiji Aoki
• 👤 Shigeru Uenishi

Bibliographic Details