Adaptive control of servo activating pressure for motor vehicle

Details Adaptive control of servo activating pressure for motor vehicle Adaptive control of servo activating pressure for motor vehicle

1990-12-07

1992-05-05

Braun, Leslie A.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

B60K 4118

Patent

active

051097320

ABSTRACT:
The present invention relates to an adaptive correction of servo activating hydraulic fluid pressure in agreement with driving force variability. In one embodiment according to the present invention, a ratio of a mass airflow of intake air admitted to an engine (Qa) and a revolution speed of a transmission output shaft (No) is calculated, and a parameter (TqSEN) is determined as a function of the ratio (Qa/No). The servo activating hydraulic fluid pressure is determined in response to this parameter. In another embodiment, a turbine shaft speed (Nt) is calculated from the output shaft speed (No) and a gear ratio (g) of a gear position established before shifting. The turbine shaft revolution speed (Nt) is used instead of the output shaft revolution speed (No) in determining a parameter (TqSEN).

REFERENCES:
patent: 4627311 (1986-12-01), Yokooku et al.
patent: 4744031 (1988-05-01), Takeda et al.
patent: 4825372 (1989-04-01), Yasue et al.
patent: 4939957 (1990-07-01), Asano et al.

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