Control device of gear transmission-equipped vehicle and method of controlling gear transmission-equipped vehicle

Patent metadata

Field	Value
Publication number	US-11597472-B2
Application number	US-202117402143-A
Country	US
Kind code	B2
Filing date	Aug 13, 2021
Priority date	Oct 12, 2020
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

Abstract

A control device of a gear transmission-equipped vehicle includes a power controller that starts power reduction control when it is determined that a start condition is satisfied, the power reduction control being control of reducing power transmitted from a driving source to a gear transmission. The start condition includes: a condition that a detection value of a gear position sensor that detects a current gear position of the gear transmission falls within a transition region between engagement regions corresponding to respective gear positions; and a condition that a speed difference obtained by subtracting a rotational speed of an output shaft of the gear transmission from a rotational speed of an input shaft of the gear transmission is a threshold or more.

First claim

What is claimed is:

1. A control device of a gear transmission-equipped vehicle, the gear transmission-equipped vehicle including a driving source and a gear transmission that changes a rotational speed of power output from the driving source,
the control device comprising:
a condition determiner that determines whether or not a predetermined start condition is satisfied; and
a power controller that starts power reduction control when the condition determiner determines that the start condition is satisfied, the power reduction control being control of reducing the power transmitted from the driving source to the gear transmission, wherein
the start condition includes
a condition that a detection value of a gear position sensor that detects a current gear position of the gear transmission falls within a transition region between engagement regions corresponding to respective gear positions, and
a condition that a speed difference obtained by subtracting a rotational speed of an output shaft of the gear transmission from a rotational speed of an input shaft of the gear transmission is a threshold or more.

2. The control device according to claim 1 , wherein the start condition includes a condition that magnitude of the power transmitted from the driving source to the gear transmission is a predetermined lower limit or more.

3. The control device according to claim 1 , wherein the start condition includes a condition that magnitude of the power transmitted from the driving source to the gear transmission is a predetermined upper limit or less.

4. The control device according to claim 1 , wherein the start condition includes a condition that a main clutch interposed between the driving source and the gear transmission is in an engaged state.

5. The control device according to claim 1 , wherein the start condition includes a condition that the detection value of the gear position sensor falls within a non-neutral region.

6. The control device according to claim 1 , wherein the condition determiner sets the threshold such that the threshold increases as a rotational speed of the driving source decreases.

7. The control device according to claim 1 , wherein:
the condition determiner further determines whether or not a predetermined termination condition is satisfied; and
when the termination condition is satisfied during execution of the power reduction control, the power controller terminates the power reduction control.

8. The control device according to claim 7 , wherein the power controller terminates the power reduction control after a delay time has elapsed since the termination condition is satisfied during the execution of the power reduction control.

Assignees

• Kawasaki Motors Ltd

Inventors

• Ueda Kengo
• Watanabe Hiroyuki
• Arima Kazuki

Classifications

• F16H61/688

  with two inputs, e.g. selection of one of two torque-flow paths by clutches · CPC title

• F16H63/18

  the final actuating mechanism comprising cams · CPC title

• F16H63/502

  for smoothing gear shifts · CPC title

• F16H3/089

  all of the meshing gears being supported by a pair of parallel shafts, one being the input shaft and the other the output shaft, there being no countershaft involved · CPC title

• F16H3/006

  power being selectively transmitted by parallel flow paths, e.g. dual clutch transmissions · CPC title