System, method, and apparatus for operating a high efficiency, high output transmission

Patent metadata

Field	Value
Publication number	US-11732797-B2
Application number	US-202217838451-A
Country	US
Kind code	B2
Filing date	Jun 13, 2022
Priority date	Dec 22, 2016
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

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.

First claim

What is claimed is:

1. An apparatus, comprising:
a clutch characterization logic configured to interpret a clutch torque profile of a clutch;
a clutch control logic configured to command a position of a progressive actuator operationally coupled to the clutch;
wherein the clutch characterization logic is further configured to:
interpret a position of the progressive actuator and an indicated clutch torque, and to update the clutch torque profile in response to the position of the progressive actuator and the indicated clutch torque; and
interpret the clutch torque profile by performing a clutch engagement position test, and comparing an acceleration of an input shaft speed of a transmission to a first expected acceleration value of the input shaft speed; and

a launch characterization logic configured to provide an iteratively derived estimated vehicle mass value that is based at least in part on a model consistency logic that adjusts an adaptation rate of operations of a vehicle environment logic and a mass estimation logic.

2. The apparatus of claim 1 , wherein the clutch engagement position test further comprises a friction brake control logic configured to command a friction brake to bring the input shaft speed to zero.

3. The apparatus of claim 1 , wherein the vehicle environment logic is configured to provide interpretations of a motive torque value, a vehicle grade value, and a vehicle acceleration value.

4. The apparatus of claim 3 , further wherein a mass estimation logic is configured to:
determine a plurality of correlations between the interpretations of the vehicle environment logic; and
determine adaptations of an estimated vehicle drag value and an estimated vehicle effective inertia based on at least the plurality of determined correlations.

5. The apparatus of claim 1 , further comprising:
a vehicle state logic configured to interpret at least one vehicle operating condition; and
a neutral enforcement logic configured to provide a first neutral command to a first shift actuator and a second neutral command to a second shift actuator, in response to the at least one vehicle operating condition indicating that vehicle motion is not intended;
wherein the first shift actuator is responsive to selectively decouple a first gear mesh, and the second shift actuators is responsive to selectively decouple a second gear mesh, wherein both gear meshes in the engaged position couple an input shaft of a transmission to drive wheels of a vehicle including the transmission, and wherein either gear mesh in the neutral position decouples the input shaft from the drive wheels.

Assignees

• Eaton Cummins Automated Trans Tech Llc
• Eaton Cummins Automated Trans Technologies

Inventors

• Connolly Thomas
• Furner Joseph Paul
• Chen Sipei
• Hawarden Jeff
• Mckenzie Ian Daniel
• Deboer Christopher

Classifications

• F16H59/0204 Primary

  for automatic transmissions with means for range selection and manual shifting, e.g. range selector with tiptronic · CPC title

• B60W10/02

  including control of driveline clutches · CPC title

• B60W10/11

  Stepped gearings · CPC title

• B60W30/19

  Improvement of gear change, e.g. by synchronisation or smoothing gear shift · CPC title

• B60W50/00

  Details of control systems for road vehicle drive control not related to the control of a particular sub-unit {, e.g. process diagnostic or vehicle driver interfaces} · CPC title