| 摘要 |
PURPOSE:To prevent the oversupply of fuel without entailing any deterioration in the efficiency of drivability in time of acceleration, by emitting an asynchronous injection demand in time of engine acceleration, and on the basis of cooling water temperature at that time, calculating an asynchronous injection value, while adding a full or partial amount of this asynchronous equivalent value to the next time synchronous injection value. CONSTITUTION:An engine controller 10 converts detection signals out of a suction pressure sensor 3 and a water temperature sensor 5 into A/D conversion 14. And, it has an I/O port 15 accepting the detection signal of a crank angle sensor 9, while the detecting signal converted into the A/D conversion 14 and a detection signal out of the I/O port 15 are all inputted into a MPU17 via a bus line 16. The MPU17 takes in suction pressure every specified time, then compares the new suction pressure (PM new) with the previously detected suction pressure (PM old), and calculates the difference DELTAPM. Then, when an asynchronous injection demand is emitted, the MPU17 secures the asynchronous injection equivalent value TAUASY=DELTAPM * constant * KASY on the basis of the said difference DELTAPM and a memory table of an ROM (read-only memory) 20. In this connection, the KASY is determined by the required table according to engine's cooling water temperature. |
