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US 5,433,125 AGranted
Gear shift mechanism of a motor vehicle transmission
AssigneeIng. h.c.F. Porsche AG
InventorRobert Muller
Life of this patent
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Abstract
A gear shift mechanism of a change speed gearbox is provided that is constructed as an auxiliary transmission, in which all the transmission gears can be shifted by the simultaneous closing of two synchronizer clutches, with one synchronizer clutch participating in the shifting of all of the transmission gears. This synchronizer clutch is actuated by a servo drive, and the other synchronizer clutches are actuated purely mechanically via a shift roller.
Claims11
A gear shift mechanism of a motor vehicle having a change-speed gearbox that has a plurality of transmission gears, with respective pairs of gearwheels, comprising:
- synchronizer clutches having sliding sleeves and engageable with the pairs of gearwheels to shift the transmission gears, the transmission gears being shiftable by the simultaneous closing of two synchronizer clutches via the sliding sleeves, wherein the sliding sleeve of a first synchronizer clutch of the plurality of synchronizer clutches cooperates in the shifting of all of the transmission gears;
- a servo drive coupled to the first synchronizer clutch which operates the first synchronizer clutch, wherein the other synchronizer clutches of the plurality of synchronizer clutches are manually operable.
Dependencies are inferred from the claim text.