Gear shift control mechanism for servo-driven transmission
AssigneeWABCO Fahrzeugbremsen GmbH
InventorsErich Reinecke, Alfred Klatt
Life of this patent
Estimating the term…
Abstract
A gear shift mechanism for providing a vehicle operator with a "feel" of a desired gear change being completed in a power operated gear unit. A drum disc connected to the gear shift lever is formed with a recess in which a locking pin of an actuator valve is engageable when the gear shift lever is operated to a shift position, thereby limiting further movement of the gear shift lever. A sensor device associated with the gear unit detects completion of the gear change and operates the actuator to retract the locking pin from the recess to allow further movement of the gear shift lever, as an indication to the vehicle operator that the intended gear change is completed, so that he may engage the clutch and apply gas.
Claims6
A gear shift mechanism for indirectly shifting the gears in a gear unit via intermediate gear drive means comprising:
- (a) a manually operable gear shift lever having first, second, and third positions, said intermediate gear drive means being operative to effect a change of gearing of said gear unit in response to movement of said gear shift lever from said first position to said second position;
- (b) locking means manually engageable with said gear shift lever in said second position thereof for preventing movement of said gear shift lever to said third position;
- and
- (c) gear change sensing means for operating said locking means in response to completion of said gear change to accordingly effect disengagement of said locking means and thereby permit further movement of said gear shift lever from said second position to said third position, by which movement an operator of said gear shift lever is apprised of completion of said gear change.
Dependencies are inferred from the claim text.