| 摘要 |
PURPOSE:To prevent incorrect combustion of engine by adding an exhaust pressure correction factor based on the differential pressure between the supercharge pressure and the exhaust pressure for the correction of basic fuel injection time signal thereby performing A/F control under acceleration of engine associated with supercharger highly accurately. CONSTITUTION:An electronic fuel injector will determine the basic fuel injection time Ti from an injection time memory 17 with correspondence to the output signals ne, thetath from an engine rotation detector 15 and a throttle valve opening sensor 9. Then the injection time Ti is corrected through an arithmetic unit 20 with correspondence to the output signals P2, T2 from a supercharge pressure sensor 13 and a supercharge temperature sensor 14 thus to operate the injection time Tif for proper air/fuel ratio. Here, the differential pressure signal between the output signal Pr from an exhaust pressure sensor 21 and the signal P2 is obtained through a subtractor 23 to read out the exhaust pressure correction factor B from an exhaust pressure correction factor memory 25 with correspondence to said differential pressure signal and the rotation signal Ne. Then the injection time Tif is corrected through an arithmetic unit 26 with correspondence to said factor B. |
