Electrified vehicle

Patent metadata

Field	Value
Publication number	US-12227164-B2
Application number	US-202217876124-A
Country	US
Kind code	B2
Filing date	Jul 28, 2022
Priority date	Sep 21, 2021
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

An electrified vehicle disclosed in the present specification includes: a motor configured to rotate a drive wheel of the electrified vehicle; a sensor configured to detect a motor rotation number that is the number of rotations of the motor; and a control device configured to perform feedback control of the motor rotation number based on a value detected by the sensor. The control device is configured to perform during the feedback control a process of extracting a vibration component in a predetermined frequency band from the value detected by the sensor, a process of calculating an integrated value by integrating the extracted vibration component for a predetermined period, and a process of determining whether the calculated integrated value falls within a predetermined abnormal range.

First claim

What is claimed is:

1. An electrified vehicle, comprising:
a motor configured to rotate a drive wheel of the electrified vehicle;
a sensor configured to detect a motor rotation number that is the number of rotations of the motor; and
a control device configured to perform feedback control of the motor rotation number based on a value detected by the sensor, wherein the control device is configured to perform during the feedback control:
a process of extracting a vibration component in a predetermined frequency band from the value detected by the sensor,
a process of calculating an integrated value by integrating the extracted vibration component for a predetermined period, and
a process of determining whether the calculated integrated value falls within a predetermined abnormal range;
wherein the control device is configured to reduce slip of the drive wheel by performing the feedback control when the slip of the drive wheel is detected;
wherein the control device is configured to adjust the extracted vibration component with a predetermined gain when calculating the integrated value;
wherein the drive wheel includes a left drive wheel and a right drive wheel;
wherein the control device is configured to change a gain according to a difference between the number of rotations of the left drive wheel and the number of rotations of the right drive wheel; and
wherein the control device is configured to set the gain to zero when the difference is higher than a predetermined threshold value.

2. The electrified vehicle according to claim 1 , wherein the predetermined frequency band includes a resonance frequency of a drive system including the motor and the drive wheel.

3. The electrified vehicle according to claim 1 , wherein the control device is configured to change the gain according to a vehicle speed of the electrified vehicle.

4. The electrified vehicle according to claim 3 , wherein the control device is configured to reduce the gain continuously or stepwise as the vehicle speed increases.

5. The electrified vehicle according to claim 3 , wherein the control device is configured to set the gain to zero when the vehicle speed is higher than a predetermined threshold speed.

6. The electrified vehicle according to claim 1 , wherein the control device is configured to increase a desired value of the motor rotation number in the feedback control when the integrated value falls within the abnormal range.

7. The electrified vehicle according to claim 1 , wherein the control device is configured to change a feedback gain in the feedback control when the integrated value falls within the abnormal range.

8. The electrified vehicle according to claim 1 , wherein the control device is configured to set a feedback gain in the feedback control to zero when the integrated value falls within the abnormal range.

9. The electrified vehicle according to claim 1 , wherein the control device is configured to stop the feedback control when the integrated value falls within the abnormal range.

Assignees

• Toyota Motor Co Ltd
• Subaru Corp

Inventors

• Murase Junichi
• Kubonoya Hideki
• Iwama Masamichi
• Ienaga Hiroshi

Classifications

• 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

• B60L2240/421

  Speed · CPC title

• B60W2510/081

  Speed · CPC title

• B60L2270/145

  Structure borne vibrations · CPC title

• B60L2240/647

  Surface situation of road, e.g. type of paving · CPC title