Vehicle automatic transmission control system for controlling th

Details Vehicle automatic transmission control system for controlling th Vehicle automatic transmission control system for controlling th

1992-09-04

1994-06-07

Black, Thomas G.

Boots, shoes, and leggings

36442402, 477 98, 477120, 477902, 477903, 477904, F16D 2104, G06F 1550, G06G 770

Patent

active

053195558

ABSTRACT:
In a system for controlling a gear ratio of a multi-step geared or continuously variable automatic transmission of a vehicle based on determined parameter indicative of operating condition of the vehicle including a driving resistance, the driving resistance is calculated in an equation in which motive force-driving resistance=vehicle mass.times.acceleration using the law of motion. In the first embodiment, the calculation is carried out, without using a torque sensor, by applying an adjustment for torque consumption by a device such as an air conditioner and a torque loss caused by braking. In the second and third embodiments, the driving resistance is calculated using a torque sensor. Thus, with the arrangement, the driving resistance can be accurately determined applying appropriate adjustment, a gear ratio to be shifted is properly determined in any traveling condition including hill climbing.

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