System, method, and apparatus for operating a high efficiency, high output transmission
AssigneeEaton Cummins Automated Transmission Tech., LLC
InventorsThomas Connolly, Joseph Paul Furner, Sipei Chen, Jeff Hawarden, Ian Daniel McKenzie, Christopher DeBoer
Life of this patent
Estimating the term…
Abstract
A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A controller controls the shift actuator utilizing an actuating pulse and an opposing pulse.
Claims17
A computer product in a non-transitory memory, wherein the computer product configures a processor when implemented from the memory to:
- provide a first opposing pulse command in a first closed volume that opposes movement of a pneumatic shift actuator of a transmission in a shift direction;
- provide an actuating pulse command in a second closed volume that promotes movement of the pneumatic shift actuator in the shift direction;
- determine a shift completion event that releases pressure in the first and second closed volumes;
- provide a second opposing pulse command in response to a shift actuator position indicating an engaging synchronizer is off the block;
- and
- interrupt at least one of the actuating pulse command and the second opposing pulse command to synchronize pressure decay in the first closed volume and the second closed volume.
A method, comprising:
- providing a first opposing pulse command in a first closed volume that opposes movement of a pneumatic shift actuator of a transmission in a shift direction;
- providing an actuating pulse command in a second closed volume that promotes movement of the pneumatic shift actuator in the shift direction;
- releasing pressure in the first closed volume and the second closed volume in response to determining a shift completion event;
- providing a second opposing pulse command in response to a shift actuator position indicating an engaging synchronizer is off the block;
- and
- interrupting at least one of the actuating pulse command and the second opposing pulse command to synchronize pressure decay in the first closed volume and the second closed volume.
A system, comprising:
- a transmission having a pneumatic shift actuator;
- and
- a controller, comprising:
- a shift control logic configured to:
- provide a first opposing pulse command in a first closed volume that opposes movement of the pneumatic shift actuator in a shift direction;
- provide a first actuating pulse command in a second closed volume that promotes movement of the pneumatic shift actuator in the shift direction;
- release pressure in the first closed volume and the second closed volume in response to determining a shift completion event;
- provide a second opposing pulse command in response to a shift actuator position indicating an engaging synchronizer is off the block;
- and
- interrupt at least one of the actuating pulse command and the second opposing pulse command to synchronize pressure decay in the first closed volume and the second closed volume.
Dependencies are inferred from the claim text.