Active rev-matching for manual transmissions

Patent metadata

Field	Value
Publication number	US-9719595-B2
Application number	US-201514753973-A
Country	US
Kind code	B2
Filing date	Jun 29, 2015
Priority date	Jun 29, 2015
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

An active rev-matching system for a motor vehicle manual transmission includes an engine control module that monitors and adjusts an output speed of the motor vehicle's prime mover and at least one sensor that monitors movement of a shift linkage. When the at least one sensor determines the movement of the shift linkage is an in-gate downshift, the engine control module adjusts the available time for the engine control module to match the output speed of the prime mover to an input speed of the transmission.

First claim

What is claimed is:

1. An active rev-matching (ARM) system for a motor vehicle manual transmission comprising:
an engine control module that monitors and adjusts an output speed of the motor vehicle's prime mover; and
at least one sensor that monitors movement of a shift linkage;
wherein when the at least one sensor determines the movement of the shift linkage is an in-gate downshift, the engine control module adjusts a rev-match start time relative to the position of the shift linkage for the engine control module to match the output speed of the prime mover to an input speed of the transmission.

2. The system of claim 1 further comprising a sensor that monitors a position of a clutch pedal, wherein the ARM is disabled or enabled depending on the position of the clutch pedal.

3. The system of claim 2 further comprising a sensor that monitors a rate of change of the position of the clutch pedal, wherein the ARM is disabled or enabled depending on the rate of change of the position of the clutch.

4. The system of claim 3 wherein the relationship between the position of the clutch pedal and the rate of change of the position of the clutch pedal is characterized by a look-up table.

5. The system of claim 4 wherein the ARM is disabled or enabled depending on the output of the look-up table.

6. The system of claim 1 wherein the at least one sensor is at least one magnetic sensor.

7. The system of claim 6 wherein the at least one magnetic sensor is a three dimensional Hall effect sensor.

8. The system of claim 1 wherein the shift linkage further provides an “H” pattern shift gate.

9. The system of claim 8 wherein the shift gate is a six forward speed and one reverse speed shift gate.

10. The system of claim 9 wherein the in-gate downshifts are second gear to first gear, fourth gear to third gear, and sixth gear to fifth gear.

11. The system of claim 1 wherein the at least one sensor is a gear absolute position sensor (GAPS).

12. The system of claim 11 wherein the GAPS performs as at least one switch when the transmission is in a reverse gear.

13. The system of claim 12 wherein the at least one switch activates at least one of: reverse display to a driver of the motor vehicle, reverse lights and reverse camera.

14. A method of controlling an active rev-matching (ARM) system for a motor vehicle manual transmission comprising:
monitoring and adjusting an output speed of the motor vehicle's prime mover;
monitoring movement of a shift linkage; and
adjusting a rev-match start time relative to the position of the shift linkage to match the output speed of the prime mover to an input speed of transmission when the movement of the shift linkage is an in-gate downshift.

15. The method of claim 14 further comprising monitoring a position of a clutch pedal and, depending on the position of the clutch pedal, disabling or enabling the ARM system.

16. The method of claim 15 further comprising monitoring a rate of change of the position of the clutch pedal and, depending on the rate of change of the position of the clutch pedal, disabling or enabling the ARM system.

17. The method of claim 16 wherein the relationship between the position of the clutch pedal and the rate of change of the position of the clutch pedal is characterized by a look-up table.

18. The method of claim 17 wherein the ARM is disabled or enabled depending on the output of the look-up table.

19. The method of claim 14 wherein the shift linkage further provides an “H” pattern shift gate.

20. The method of claim 19 wherein the shift gate is a six forward speed and one reverse speed shift gate, and wherein the in-gate downshifts are second gear to first gear, fourth gear to third gear, and sixth gear to fifth gear.

Assignees

• Gm Global Tech Operations Llc
• Gm Global Tech Operations Llc

Inventors

• Bur Bradford W
• Rodenbo Edward J
• Hoffman Shaun D
• Chang Richard I

Classifications

• F16H59/044

  consisting of electrical switches or sensors · CPC title

• F16H2063/506

  for engine torque resume after shift transition, e.g. a resume adapted to the driving style · CPC title

• F16H61/12

  Detecting malfunction or potential malfunction, e.g. fail safe (in control of hydrostatic gearing F16H61/4192) {; Circumventing or fixing failures} · CPC title

• B60W10/06

  including control of combustion engines · CPC title

• F16H61/0403

  Synchronisation before shifting · CPC title