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US 12,410,861 B2Granted
System, method, and apparatus for operating a high efficiency, high output transmission
AssigneeEaton Cummins Automated Transmission Technologies, 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.
Claims14
A transmission, comprising:
- an input shaft configured to couple to a prime mover;
- a countershaft having a first plurality of gears mounted thereon;
- a main shaft having a second plurality of gears mounted thereon;
- an output shaft selectively providing a torque output to a driveline;
- a shift actuator configured to selectively couple the input shaft to the main shaft by rotatably coupling at least one of the first plurality of gears to the countershaft and the second plurality of gears to the main shaft, wherein the shift actuator is mounted on an exterior wall of a housing, and wherein the countershaft and the main shaft are at least partially positioned within the housing;
- a progressive actuator operationally coupled to an input clutch, wherein a progressive actuator position corresponds to a clutch position of the input clutch;
- the input clutch configured to selectively decouple the prime mover from the input shaft;
- and
- a clutch control logic configured to provide a lock-up time of the input clutch, the lock-up time comprising a time commencing with a clutch torque request time and ending with a clutch lock-up event, wherein during the lock-up time, the clutch control logic commands a position of the progressive actuator to maintain a clutch slip feedback value between a slip low threshold value and a slip high threshold value and the clutch lock-up event comprises a clutch slip value being lower than a clutch lock-up slip threshold value.
6 more elements
A transmission, comprising:
- an input shaft configured to couple to a prime mover;
- a countershaft having a first plurality of gears mounted thereon;
- a main shaft having a second plurality of gears mounted thereon;
- an output shaft selectively providing a torque output to a driveline;
- a shift actuator configured to selectively couple the input shaft to the main shaft by rotatably coupling at least one of the first plurality of gears to the countershaft and the second plurality of gears to the main shaft, wherein the shift actuator is mounted on an exterior wall of a housing, and wherein the countershaft and the main shaft are at least partially positioned within the housing;
- an input clutch configured to selectively decouple the prime mover from the input shaft;
- a progressive actuator operationally coupled to the input clutch, wherein a progressive actuator position corresponds to a clutch position;
- a controller, comprising:
- a clutch characterization logic configured to interpret a clutch torque profile of the input clutch, the clutch torque profile providing a relation between the clutch position and a clutch torque value;
- and
- a clutch control logic configured to provide a lock-up time of the input clutch, the lock-up time comprising a time commencing with a clutch torque request time and ending with a clutch lock-up event, wherein the clutch lock-up event comprises a clutch slip value being lower than a clutch lock-up slip threshold value, wherein the clutch control logic is further configured to command a second progressive actuator position in response to a clutch torque reference value and the clutch torque profile;
- and
- wherein the clutch characterization logic is further configured to:
- interpret the second progressive actuator position and an indicated clutch torque;
- and
- update the clutch torque profile in response to the second progressive actuator position and the indicated clutch torque.
13 more elements
Dependencies are inferred from the claim text.