Hydraulic control unit for automotive transmissions
This patent describes a hydraulic control unit for use in an automotive transmission having a speed change gear and a clutch, the hydraulic control unit including a housing, a change gear operating mechanism means for hydraulically operating the speed change gear, and a clutch operating mechanism means for hydraulically operating the clutch. The change gear operating mechanism means and the clutch operating mechanism means are both incorporated in the housing. The improvement described here is wherein the change gear operating mechanism means comprises a first hydraulic actuator means for effecting gear shifting of the speed change gear and gear selection thereof, first solenoid valve means for controlling the first hydraulic actuator means, first and second position sensor means for sensing positions of the first hydraulic actuator means indicative of a selected gear position thereof, respectively. The clutch operating mechanism means comprises a second hydraulic actuator means for effecting engagement and disengagement of the clutch, second solenoid valve means for controlling the second hydraulic actuator means, and a third position sensor means for sensing a position of the second hydraulic actuator means indicative of engagement and disengagement of the clutch. The first and second hydraulic actuator means, the first and second solenoid valve means, and the first, second and third position sensor means are all incorporated in one body in the housing.
- Assignee:
- Diesel Kiki Co., Ltd., Tokyo
- Patent Number(s):
- US 4625840
- OSTI ID:
- 7035717
- Resource Relation:
- Patent File Date: Filed date 13 Aug 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MECHANICAL TRANSMISSIONS
HYDRAULIC CONTROL DEVICES
VEHICLES
ACTUATORS
GEARS
POSITIONING
SOLENOIDS
SPEED REGULATORS
VALVES
CONTROL EQUIPMENT
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
MACHINE PARTS
330602* - Vehicle Design Factors- Engine-Transmission Matching