Transmission system and method for performing a gearshift
AssigneeZeroshift Limited
InventorsWilliam Wesley Martin, Anthony Joseph Child
Life of this patent
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Abstract
A transmission system and method for operating the transmission system, where the transmission system includes a selector assembly arranged to select between gear ratios instantaneously without substantial power interruption. The selector assembly includes first and second sets of engagement members and an actuator system. The actuator system may have a first actuator member for moving the first set of engagement members, a second actuator member for moving the second set of engagement members, a first actuator device for actuating the first actuator member and a second actuator device for actuating the second actuator member independently of the first actuator device.
Claims45
A transmission system including a first shaft, a first gear element rotatably mounted on the first shaft, a first gear selector assembly including first and second sets of engagement members, arranged to selectively lock the first gear wheel for rotation with the first shaft, said selection being from operational modes that include:
- lock the first gear element for rotation with the first shaft in the clockwise and anti-clockwise directions;
- lock the first gear element for rotation with the first shaft in the clockwise direction and not lock in the anti-clockwise direction;
- lock the first gear element for rotation with the first shaft in the anti-clockwise direction and not lock in the clockwise direction;
- and further including an actuator system for selecting between the operational modes having a first actuator member for moving the first set of engagement members, a second actuator member for moving the second set of engagement members, a first actuator device for actuating the first actuator member and a second actuator device for actuating the second actuator member independently of the first actuator device.
A transmission system including first and second rotatable shafts, and means for transferring drive from one of the shafts to the other shaft including first and second gear elements each rotatably mounted on the first shaft and having drive formations formed thereon, a gear selector assembly for selectively transmitting torque between the first shaft and the first gear element and between the first shaft and the second gear element, said selector assembly including first and second sets of engagement members that are moveable into and out of engagement from the first and second gear elements and an actuator system, wherein the gear selector assembly is arranged such that when a driving force is transmitted, one of the first and second sets of engagement members drivingly engages the engaged gear element, and the other set of engagement members is then in an unloaded condition, and the actuator system includes a first actuator member for moving the first set of engagement members, a second actuator member for moving the second set of engagement members, a first actuator device for actuating the first actuator member and a second actuator device for actuating the second actuator member independently of the first actuator device, and wherein the actuator system is arranged to move the unloaded set of engagement members into driving engagement with the unengaged gear element to effect a gear change.
A method for performing a gearshift in a transmission system having first and second gear elements rotatably mounted on a first shaft, a first gear selector assembly for selectively locking the first gear element for rotation with the first shaft and a second gear selector assembly for selectively locking the second gear element for rotation with the first shaft, wherein each gear selector assembly includes first and second sets of engagement members and an actuator system for actuating the first and second sets of engagement members for locking its respective gear element for rotation with the first shaft, said selection being from operational modes that include:
- lock the gear element for rotation with the first shaft in an acceleration and a deceleration directions;
- lock the gear element for rotation with the first shaft in the acceleration direction and not lock in the deceleration direction;
- lock the gear element for rotation with the first shaft in the deceleration direction and not lock in the acceleration direction, and a control system for controlling operation of the transmission system, including disengaging an unloaded set of engagement members from a currently engaged gear element prior to selecting a new gear element with the other gear selector assembly.
Dependencies are inferred from the claim text.