PURPOSE: To always carry out a precise fuel supply control which is not affected by the shift of air-fuel ratio due to secular changes, etc., by compensating the supply amount of fuel in accordance with compensating variables and compensating coefficients corresponding to set voltage which is fed from a single voltage formulating means.
CONSTITUTION: Upon operation of an engine an ECU5 receives output signals from a throttle valve opening degree sensor 4, an intake-air pressure sensor 8, a water temperature sensor 10, a rotating angle sensor 11, an O2 sensor etc., and a CPU503 computes at first a basic injection time Ti. Then, the basic injection time Ti is compensated in accordance with a plurality of compensating coefficients obtained from a predetermined compensating coefficient map, and therefore, an actual fuel injection time Tout is calculated. At this time, the CPU503 also receives output signals from a Vpro regulator 511 through a multi-plexer 505, that is, the CPU503 receives compensating coefficients Tpro, Kpro for an adding term and a multiplying term in an operating equation for obtaining the fuel injection time Tout, corresponding to a set voltage which is fed from a single voltage formulating means, and therefore, compensates the basic injection time Ti also in accordance with these compensating coefficients.
KIUCHI TAKEO
TOMOSAWA KIKUO
OKI ELECTRIC IND CO LTD
| JPS5634932A | 1981-04-07 | |||
| JPS562437A | 1981-01-12 | |||
| JPS56138440A | 1981-10-29 |