Method for reducing a torque output of an internal combustion en

Details Method for reducing a torque output of an internal combustion en Method for reducing a torque output of an internal combustion en

1994-11-10

1996-07-30

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

F02D 700

Patent

active

055402046

ABSTRACT:
A control system and method for an internal-combustion engine with which the torque output of the internal-combustion engine can be reduced by suppressing the injection of fuel in individual cylinders in accordance with specifiable suppression patterns or by shifting the ignition firing point or the ignition angle. The suppression pattern is selected in dependence upon the desired torque reduction. The suppression of cylinders is allowed, however, only when in the case of the selected suppression pattern the number of cylinders to be suppressed per working cycle lies above a threshold value. The threshold value is selected in dependence upon the operating state of the internal-combustion engine, in particular on at least one of the following operating parameters: temperature of the internal-combustion engine, exhaust gas temperature, catalytic-converter temperature, load, rotational frequency, and a variable indicating whether a warm-up function of the internal-combustion engine has been activated.

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B. Boning et al., "Traction Control (ASR) Using Fuel-Injection Suppression-A Cost Effective Method of Engine-Torque Control", SAE Paper No. 920641, Feb. 1992, pp. 35-42.

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