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US 11,821,509 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.
Claims7
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 clutch configured to selectively decouple the prime mover from the input shaft;
- a progressive actuator operationally coupled to the 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, the clutch torque profile providing a relation between the clutch position and a clutch torque value;
- a clutch control logic 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;
- and
- a means for providing a lock-up time of the 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.
14 more elements
An apparatus, comprising:
- a clutch characterization logic configured to interpret a clutch torque profile, the clutch torque profile providing a relation between a position of a clutch and a clutch torque value;
- a clutch control logic configured to command a position of a progressive actuator of a transmission, wherein a position of the progressive actuator corresponds to a position of the clutch, in response to a clutch torque reference value and the clutch torque profile;
- and
- wherein the clutch characterization logic is further configured to:
- interpret a position of the progressive actuator and an indicated clutch torque, wherein the interpreting the indicated clutch torque is in response to a prime mover torque value;
- and
- update the clutch torque profile in response to the position of the progressive actuator and the indicated clutch torque;
- a means for providing a lock-up time of the 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;
- and
- a launch characterization logic configured to adapt a set of torque curves based at least on a selected launch mode, wherein the launch characterization logic is configured to provide mass estimation for loads on the transmission based on the selected launch mode.
7 more elements
Dependencies are inferred from the claim text.