| 摘要 |
PURPOSE:To eliminate the need for a pressure sensor for detecting the inner pressure of each suction pipe of the up- and down-streams of a compressor for a supercharger by adequately correcting suction density by simulating the inner pressure of the suction pipes of the up-and down-streams of the compressor by other parameters. CONSTITUTION:An engine revolution-number signal Ne is obtained in a counter 6 from outputs from revolution sensors 1, 2, etc. Fundamental fuel injection-quantity Ti is counted by a fundamental fuel injection-quantity counting circuit 13 from an output thetath from a throttle-valve opening sensor 8 and the signal Ne. A signal corresponding to pressure difference P1' before and behind an air cleaner is read from a memory circuit 21 from each signal Ne and thetath while a signal corresponding to atmospheric pressure P0 is read from a memory circuit 24 from suction negative pressure PB from a pressure sensor 7 in a suction density correction-coefficient counting circuit 20. A suction density correction coefficient gammaA is obtained from differential pressure P1 between both signals P1' and P0' a suction temperature T1 by a temperature sensor 9 and suction negative pressure PB, the quantity of injection Ti is corrected, and each injection valve 35, 36 is controlled. |
