Control system for internal combustion engines for vehicles

Details Control system for internal combustion engines for vehicles Control system for internal combustion engines for vehicles

1997-04-24

1998-10-27

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

F02D 4104

Patent

active

058271511

ABSTRACT:
A control system for an internal combustion engine for a vehicle has an automatic transmission. The control system is operable during gear shifting of the automatic transmission, for changing output torque of the engine to reduce a shock generated during the gear shifting. During gear shifting in which a change gear ratio of the automatic transmission is to be increased, upon stepping-on of the accelerator pedal of the vehicle, the output torque of the engine is increased by a first predetermined amount based on an operating condition of the vehicle when an increase occurs in the rotational speed of the engine due to the gear shifting. After the output torque of the engine is increased by the first predetermined amount, the output torque of the engine is decreased by a second predetermined amount based on the operating condition of the vehicle. After the output torque of the engine is decreased by the second predetermined amount, the output torque of the engine is progressively recovered to a value assumed upon completion of the gear shifting.

REFERENCES:
patent: 5079970 (1992-01-01), Butts et al.
patent: 5445576 (1995-08-01), Motamedi et al.
patent: 5580331 (1996-12-01), Shiraishi et al.

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