System and method for controlling gear shifting of automatic tra

Details System and method for controlling gear shifting of automatic tra System and method for controlling gear shifting of automatic tra

1996-12-30

1998-09-01

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

With brake control

477 96, F16H 5954

Patent

active

058003070

ABSTRACT:
A system and a method for controlling gear shifting of automatic transmission vehicles, the system including a timer providing a timing signal, a vehicle speed sensor converting a vehicle speed to an electric signal and outputting the signal after detecting the vehicle speed, a throttle position sensor converting a throttle valve opening to an electric signal and outputting the signal after detecting a throttle valve opening, an accelerator switch for determining whether an accelerator pedal is pressed, a brake switch for determining whether a brake pedal is pressed, a microcontroller responsive to signals from the vehicle speed sensor and the throttle position sensor and having a control signal to prevent upshift if a driver presses the brake pedal after a predetermined time has lapsed, the time which is from the driver's release of the accelerator pedal in a condition of upshift. This improves damping force and provides for easy braking by preventing upshift when the system detects that the driver presses the brake pedal after a lapse of a predetermined time from releasing the accelerator pedal, even under the condition of shifting from low gear to high gear.

REFERENCES:
patent: 5025684 (1991-06-01), Stehle et al.
patent: 5048650 (1991-09-01), Takizawa

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