Engine torque control system

Details Engine torque control system Engine torque control system

1998-12-01

2000-04-25

Dolinar, Andrew M.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

12333916, 123350, F02D 1110, F02D 4114

Patent

active

060554762

ABSTRACT:
An engine torque control system controls an intake air quantity with a throttle valve and a fuel supply quantity with a fuel injector so as to obtain a target engine torque and a target air fuel ratio in accordance with engine operating conditions. The torque control system comprises a first section for calculating a target equivalent ratio, a second section for calculating a unit demand throttle opening area which is a demand throttle opening area per unit displacement for one engine revolution, in accordance with the accelerator opening degree and the engine speed, a third section for calculating a target base intake air quantity from the unit demand throttle opening area, a fourth section for calculating a target control intake air quantity from the target base intake air quantity and the target equivalent ratio, a fifth section for calculating a desired target throttle opening degree from the target control intake air quantity and the engine speed, and a sixth section for controlling the actual throttle opening degree of the throttle valve to the target throttle opening degree.

REFERENCES:
patent: 5078109 (1992-01-01), Yoshida et al.
patent: 5931138 (1999-08-01), Uchida

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