Electronic shift controls for a multiple ratio transaxle

Details Electronic shift controls for a multiple ratio transaxle Electronic shift controls for a multiple ratio transaxle

1990-09-17

1992-09-22

Lall, Parshotam S.

Boots, shoes, and leggings

74866, 74867, B60K 4106, B60K 4122

Patent

active

051502976

ABSTRACT:
An electronic control system for a multiple ratio automotive transmission having pressure operated clutch and brake servos for controlling ratio changes, solenoid operated valves for triggering operation of shift valves in a valve circuit that communicates with the servos, a microprocessor for developing control signals in response to input variables that measure engine torque, engine speed, vehicle speed and a driver-actuated range selector, the shift valves responding to the control signals in accordance with a control strategy that effects controlled response of the shift valves to meet varying road speed, engine torque and road conditions with high quality shift performance.

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patent: 4945482 (1990-07-01), Nishikawa et al.
patent: 4953091 (1990-08-01), Baltusis et al.
patent: 4998200 (1991-03-01), Glowczewski et al.

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