Control apparatus

Patent metadata

Field	Value
Publication number	US-11993265-B2
Application number	US-202117443829-A
Country	US
Kind code	B2
Filing date	Jul 28, 2021
Priority date	Aug 20, 2020
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

A control apparatus to be applied to a vehicle includes an acquiring unit and an estimator. The acquiring unit is configured to acquire wheel speeds of respective wheels of the vehicle and a steering angle of the vehicle. The estimator is configured to estimate vehicle speeds at respective positions of the respective wheels, on the basis of a minimum wheel speed among the wheel speeds of the respective wheels and the steering angle.

First claim

The invention claimed is:

1. A control apparatus to be applied to a vehicle, the control apparatus comprising:
an acquiring unit including a sensor, the acquiring unit configured to acquire a first wheel speed of a first wheel of the vehicle, a second wheel speed of a second wheel of the vehicle, and a steering angle of the vehicle; and
a processor communicably connected with at least the sensor, the processor configured to
estimate a first vehicle speed at a first respective position of the first wheel and a second vehicle speed at a second respective position of the second wheel, and
control torques of the respective first and second wheels based on at least the estimated first vehicle speed and the estimated second vehicle speed in a predetermined traveling state of the vehicle, wherein
the processor is configured to estimate the first vehicle speed at the first respective position and the second vehicle speed at the second respective position based on (i) a minimum wheel speed among the first wheel speed of the first wheel and the second wheel speed of the second wheel, and (ii) the steering angle,
the processor is further configured to control a slip rate of each of the respective first and second wheels, on a basis of the estimated first and second vehicle speeds at the respective first and second positions of the respective first and second wheels, and
the processor is configured to refrain from performing a control of the slip rate that is based on the estimated first and second vehicle speeds at the respective first and second positions of the respective first and second wheels, in a case where both of the respective first and second wheels of the vehicle involve a slip.

2. The control apparatus according to claim 1 , wherein the processor is configured to estimate the first and second vehicle speeds at the respective first and second positions of the respective first and second wheels, on a basis of a relationship between the steering angle and a turning radius of the vehicle, and on a basis of a relationship between the turning radius and distances from a turning center of the vehicle to the respective first and second wheels.

3. A control apparatus to be applied to a vehicle, the control apparatus comprising
circuitry configured to
acquire a first wheel speed of a first wheel of the vehicle, a second wheel speed of a second wheel of the vehicle, and a steering angle of the vehicle, and
estimate a first vehicle speed at a first respective position of the first wheel and a second vehicle speed at a second respective position of the second wheel, and
control torques of the respective first and second wheels based on at least the estimated first vehicle speed and the estimated second vehicle speed, wherein
the circuitry is configured to estimate the first vehicle speed at the first respective position and the second vehicle speed at the second respective position based on (i) a minimum wheel speed among the first wheel speed of the first wheel and the second wheel speed of the second wheel, and (ii) the steering angle,
the circuitry is further configured to control a slip rate of each of the respective first and second wheels, on a basis of the estimated first and second vehicle speeds at the respective first and second positions of the respective first and second wheels, and
the circuitry is configured to refrain from performing a control of the slip rate that is based on the estimated first and second vehicle speeds at the respective first and second positions of the respective first and second wheels, in a case where both of the respective first and second wheels of the vehicle involve a slip.

Assignees

• Subaru Corp

Inventors

• Oguro Chihiro

Classifications

• B60W30/18172 Primary

  Preventing, or responsive to skidding of wheels · CPC title

• B60W40/105

  Speed · 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

• B60W2520/10

  Longitudinal speed · CPC title

• B60W2520/12

  Lateral speed · CPC title