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US 2015/0204443 A1Published application
Manual Shift Transmission Control
AssigneeTREMEC Corporation
InventorKevin Ryan
Life of this patent
Estimating the term…
Abstract
A manually shiftable transmission includes a blocking mechanism to prevent unintended engagement of a first forward gear set. An electronic controller is provided for moving the blocking mechanism into an unblocking position. A manually operable release switch is provided to generate a signal to an electronic controller to move the blocking mechanism into the unblocking position when an intentional engagement of the first gear set is desired. The transmission may also include a mechanism to inhibit engagement of a reverse gear set. The electronic controller and manually operable release switch may be used to move the reverse gear inhibiting mechanism to an uninhibited position.
Claims20
A manually operable transmission comprising:
- a transmission housing,
- an input shaft mounted for rotation in the housing,
- a output shaft mounted for rotation in the hosing,
- a first forward gear set and a second forward gear set, each gear set selectively engagable to drivingly connect the input shaft and output shaft,
- a shift rail mounted for movement relative to the housing for selectively drivingly connecting the first forward gear set or the second forward gear set between the input an output shafts,
- a manually operable shift lever pivotally mounted on the housing, the shift lever drivingly engaging the shift rail,
- a blocking mechanism selectively movable between a blocked position wherein the shift lever is prevented from drivingly connecting a first forward gear set between the input shaft and the output shaft, and an unblocked position wherein the shift lever may cause the first forward gear set to drivingly connect the input shaft and the output shaft,
- an electronic controller for moving the blocking mechanism into the unblocked position,
- a manually operable release switch for generating a signal to the electronic controller to move the blocking mechanism into the unblocked position.
6 more elements
A manually operable transmission comprising:
- a transmission housing,
- an input shaft mounted for rotation in the housing,
- a output shaft mounted for rotation in the hosing,
- a shift rail mounted for movement relative to the housing,
- a manually operable shift lever pivotally mounted on the housing, the shift lever drivingly engaging the shift rail,
- a first pair of forward gear sets, the first pair comprising a first forward gear set and a second forward gear set, each of the first and second forward gear sets selectively engagable by the shift rail to drivingly connect the input shaft and output shaft,
- a blocking mechanism selectively movable between a blocked position wherein the shift lever is prevented from drivingly connecting the first pair of forward gear sets between the input shaft and the output shaft, and an unblocked position wherein the shift lever may cause driving connection of the input shaft and the output shaft through the first pair of forward gear sets,
- an electronic controller for moving the blocking mechanism into the unblocked position,
- a manually operable release switch for generating a signal to the electronic controller to move the blocking mechanism into the unblocked position.
6 more elements
A manually operable transmission comprising:
- a transmission housing,
- an input shaft mounted for rotation in the housing,
- a output shaft mounted for rotation in the hosing,
- a first shift rail mounted for movement relative to the housing,
- a second shift rail mounted for movement relative to the housing,
- a manually operable shift lever pivotally mounted on the housing, the shift lever selectively drivingly engagable with the first and second shift rails,
- a first pair of forward gear sets, the first pair comprising a first forward gear set and a second forward gear set, each of the first and second forward gear sets selectively engagable by the first shift rail to drivingly connect the input shaft and output shaft,
- a second pair of forward gear sets, the second pair comprising a third forward gear set and a fourth forward gear set, each of the third and fourth forward gear sets selectively engagable by the second shift rail to drivingly connect the input shaft and output shaft,
- a blocking mechanism selectively movable between a blocked position wherein the shift lever is prevented from drivingly engaging the first shift rail, and an unblocked position wherein the shift lever may drivingly engage the first shift rail,
- an electronic controller for moving the blocking mechanism into the unblocked position,
- a manually operable release switch for generating a signal to the electronic controller to move the blocking mechanism into the unblocked position.
8 more elements
Dependencies are inferred from the claim text.