Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1990-10-15
1991-12-24
Braun, Leslie A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74868, B60K 4106
Patent
active
050741675
ABSTRACT:
An automatic transmission includes a hydraulic control circuit for developing coupling pressure to the friction coupling member, the hydraulic control circuit having a regulator device for regulating the coupling pressure and a solenoid valve for controlling the regulator device, a hydraulic pressure sensor device for detecting hydraulic pressure in connection with the coupling pressure, an actuator device for actuating the solenoid valve in a range between the opening position and the closing position to change the control amount of the solenoid valve when the vehicle is in a predetermined state, a memory device for storing a characteristic relationship between detected hydraulic pressures and changed control amounts, and a control device for controlling the solenoid valve based on the characteristic relationship so that the regulator device regulates the coupling pressure to a desired value. This automatic transmission compensates a variation in characteristic relationship between the control amount of the solenoid valve and the coupling pressure, and assures more accurate open control.
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07/342855 Pending Patent Application Assigned to Mazda Motor Corp., Dated 04-25-89.
Ishii Kouzou
Tanaka Shin-ichi
Yoshimura Hiroshi
Braun Leslie A.
Mazda Motor Corporation
Trousdell William O.
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