Temperature rise control for disc type friction torque transmitt

Details Temperature rise control for disc type friction torque transmitt Temperature rise control for disc type friction torque transmitt

1999-04-12

2000-08-01

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Control by sensed ambient condition, pattern indicia,...

477 76, B60K 2302

Patent

active

060959460

ABSTRACT:
A multi-speed transmission control has a CPU which utilizes a pre-programmed computer to control the interchange of the friction devices in the transmission. A routine within the CPU is executed by the computer at least when an impending ratio interchange is sensed. The routine uses stored data which includes friction disc parameters, engine operating parameters and vehicle performance parameters to determine if the impending shift will result in sufficient excess heat energy to cause the temperature of components in the friction device to exceed a predetermined design limit. If the temperature design limit will be exceeded, a reduced energy ratio interchange is commanded utilizing adaptive parameters for the upcoming shift; and if the temperature design limit will not be exceeded, the ratio interchange proceeds without adaptive parameters.

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