Method and device for the open-loop control of an internal-combu

Details Method and device for the open-loop control of an internal-combu Method and device for the open-loop control of an internal-combu

1994-12-19

1996-11-19

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Specific throttle valve structure

F02M 300

Patent

active

055752578

ABSTRACT:
In a method and device for the open-loop control of an internal-combustion engine, the change in the torque caused by an influencing of the ignition angle is compensated for by a correspondingly adjusted influencing of the air inducted by the internal-combustion engine. Thus, the accelerator-pedal characteristic is hardly influenced in the case of a change in the ignition angle. The method and device can be used, for example, to accelerate the heating up of a catalytic converter after start-up of the internal-combustion engine. To reinforce the heating operation and to reduce emission, an intervention in the air/fuel ratio can be made at the same time, and a switching signal can be produced, for example, for a secondary air pump. The air inducted by the internal-combustion engine is generally influenced by an idle-speed actuator, which is arranged in a by-pass duct leading to the throttle valve. In the case of internal-combustion engines having an electronically controlled throttle valve, in place of the idle-speed actuator, the throttle valve can also be influenced accordingly. Weighting factors which depend on the operating state of the internal-combustion engine, are used to weight the influencing of the ignition angle, the idle-speed actuator, the throttle valve, and/or the air/fuel ratio.

REFERENCES:
patent: 4144853 (1979-03-01), Maruoka et al.
patent: 5320077 (1994-06-01), Kamiya et al.
patent: 5333585 (1994-08-01), Kuroda
patent: 5463993 (1995-11-01), Livshits et al.
patent: 5495835 (1996-03-01), Ueda
patent: 5497745 (1996-03-01), Cullen et al.

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