Internal-combustion engines – Engine speed regulator – Open loop condition responsive
Patent
1997-02-04
1998-04-07
Moulis, Thomas N.
Internal-combustion engines
Engine speed regulator
Open loop condition responsive
F02D 4134
Patent
active
057352445
ABSTRACT:
With engine control apparatus for controlling a throttle opening and fuel injection quantity in order to realize a target engine torque according to the present invention, in the case where a target air-fuel ratio is changed in accordance with a change in the target engine torque, erroneous control of the fuel injection quantity is prevented.
To achieve this, a target fuel quantity and a target air-fuel ratio are set based on the target engine torque, and a target air quantity is computed from the target fuel quantity and the target air fuel ratio. A target throttle opening is then computed based on the target air quantity, to control an electrically controlled throttle valve. Meanwhile, an actual air quantity detected by an air flow meter is smoothed, and a cylinder charge air quantity computed. The target air-fuel ratio is then corrected using a ratio of the cylinder charge air quantity to the target air quantity. A target fuel injection quantity is then computed from the cylinder charge air quantity and a post correction target air-fuel ratio, to control a fuel injector.
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Hosoya Hajime
Machida Kenichi
Moulis Thomas N.
Unisia Jecs Corporation
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