Vehicle controlling device

Patent metadata

Field	Value
Publication number	US-10344811-B2
Application number	US-201515547183-A
Country	US
Kind code	B2
Filing date	Dec 16, 2015
Priority date	Jan 30, 2015
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

A vehicle controlling device has a frictional engagement element provided between a drive motor and a driving wheel; a shifting unit capable of selecting a travel range or a non-travel range; first obtaining unit configured to, during selection of the travel range, obtain a first parameter including at least a first motor torque value that is a torque value of the drive motor; second obtaining unit configured to, during selection of the non-travel range, obtain a second parameter including at least a second motor torque value that is a torque value of the drive motor; and operating unit configured to, on the basis of the first and second parameters, calculate a zero point hydraulic pressure command value at which the frictional engagement element starts to generate a torque capacity. It is therefore possible to detect a zero point of a clutch between the drive motor and the driving wheel.

First claim

The invention claimed is:

1. A vehicle controlling device comprising:
a frictional engagement element provided between a drive motor and a driving wheel;
a shifting unit capable of selecting a travel range or a non-travel range;
a first obtaining unit configured to, during selection of the travel range, obtain a first parameter including at least a first motor torque value that is a torque value of the drive motor;
a second obtaining unit configured to, during selection of the non-travel range, obtain a second parameter including at least a second motor torque value that is a torque value of the drive motor; and
an operating unit configured to, using the first and second motor torque values, calculate a zero point hydraulic pressure command value which is a hydraulic pressure command value at which the frictional engagement element starts to generate a torque capacity.

2. The vehicle controlling device as claimed in claim 1 , wherein:
the first obtaining unit is configured to obtain, as the first parameter, the first motor torque value when the frictional engagement element is slip-controlled and a hydraulic pressure command value for the frictional engagement element when the first motor torque value is obtained, and
the second obtaining unit configured to obtain, as the second parameter, the second motor torque value when the frictional engagement element is disengaged.

3. The vehicle controlling device as claimed in claim 1 , wherein:
the first obtaining unit is configured to obtain, as the first parameter, a first temperature value corresponding to a temperature during the travel range when the first motor torque value is obtained,
the second obtaining unit is configured to obtain, as the second parameter, a second temperature value corresponding to a temperature during the non-travel range when the second motor torque value is obtained, and
the operating unit is configured to, when the second temperature value is different from the first temperature value, correct the second motor torque value on the basis of a difference between the second temperature value and the first temperature value, and calculate the zero point hydraulic pressure command value on the basis of the corrected second motor torque value.

4. A vehicle controlling device comprising:
a clutch provided between a drive motor and a driving wheel;
a shifter capable of selecting a travel range or a non-travel range; and
a controller configured to
during selection of the travel range, obtain a first parameter including at least a first motor torque value that is a torque value of the drive motor;
during selection of the non-travel range, obtain a second parameter including at least a second motor torque value that is a torque value of the drive motor; and
using the first and second motor torque values, calculate a zero point hydraulic pressure command value which is a hydraulic pressure command value at which the clutch starts to generate a torque capacity.

5. The vehicle controlling device as claimed in claim 4 , wherein the controller is further configured to:
obtain, as the first parameter, the first motor torque value when the clutch is slip-controlled and a hydraulic pressure command value for the clutch when the first motor torque value is obtained, and
obtain, as the second parameter, the second motor torque value when the clutch is disengaged.

6. The vehicle controlling device as claimed in claim 4 , wherein the controller is further configured to:
obtain, as the first parameter, a first temperature value corresponding to a temperature during the travel range when the first motor torque value is obtained,
obtain, as the second parameter, a second temperature value corresponding to a temperature during the non-travel range when the second motor torque value is obtained, and
when the second temperature value differs from the first temperature value, correct the second motor torque value on the basis of a difference between the second temperature value and the first temperature value, and calculate the zero point hydraulic pressure command value on the basis of the corrected second motor torque value.

Assignees

• Jatco Ltd
• Nissan Motor

Inventors

• Hattori Kenji
• Kotsuji Kouichi

Classifications

• B60W2050/0083

  Setting, resetting, calibration · CPC title

• B60W2510/101

  Transmission neutral state · CPC title

• B60L15/20

  for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed · CPC title

• F16D2500/30404

  Clutch temperature · CPC title

• Y10S903/914

  Actuated, e.g. engaged or disengaged by electrical, hydraulic or mechanical means · CPC title