PURPOSE: To secure a degree of proper decelerating fuel in accord with both partial-cylinder and all-cylinder operations, by controlling a fuel injection quantity control device with a decelerating fuel control device in time of deceleration, while constituting a part of decrement in time of patial-cylinder operation so as to cause the decelerating fuel to become smaller than that in time of all-cylinder operation.
CONSTITUTION: In case of a control unit 28 inputting engine speed signals out of an output signal from each of sensors 3, 29W31 detecting those of throttle valve opening, cooling water temperature, suction temperature and suction pressure each during engine driving and an ignition coil 32, first of all, a fact that whether or not a partial-cylinder operating range is the case is discriminated. Likewise, whether it is in a state of deceleration or not is detected on the basis of opening of a throttle valve and an engine speed. And, a fuel injection quantity is determined on the basis of the suction pressure and the engine speed at a fuel injection quantity control device but in time of decelerating state detection, the fuel injection quantity control device is controlled by a decelerating fuel control device whereby a part of the partial-cylinder operation is controlled so as to make the decelerating fuel smaller than that in time of the all-cylinder operation.
HATAOKA KENJI
TAKAHASHI KOUICHI
YAMASHITA AKINORI
| JPS503446A | 1975-01-14 | |||
| JPS5654933A | 1981-05-15 | |||
| JPS57200636A | 1982-12-08 |
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