Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1986-07-14
1988-09-13
Braun, Leslie A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74865, B60K 4102
Patent
active
047700661
ABSTRACT:
An engine brake control for a transmission is disclosed. The transmission includes a hydraulically operated clutch selectively establishing a drive connection between a first rotary member and a second rotary member, and a one-way clutch arranged in parallel to the hydraulically operated clutch such that when the hydraulically operated clutch is released the one-way clutch transmits forward torque from the first rotary member to the second rotary member, but interrupts transmission of reverse torque to the first rotary member from the second rotary member. When a driver demands engine brake, a manual selector valve generates an engine brake command fluid pressure. A valve includes a valve spool having a first position where the hydraulically operated clutch is connected to a drain to discharge hydraulic fluid therefrom and thus the hydraulically operated clutch is released, and a second position where the hydraulically operated clutch is connected to the manual selector valve to supply the engine brake command fluid pressure thereto and thus the hydraulically operated clutch is engaged. The valve spool is normally urged to the first position thereof, but is allowed to take the second position thereof upon detecting the coasting state of the automotive vehicle.
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Hayasaki Koichi
Sugano Kazuhiko
Braun Leslie A.
Nissan Motor Co,. Ltd.
Novais David
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