Vehicle travel device and vehicle travel control method

Patent metadata

Field	Value
Publication number	US-9688285-B2
Application number	US-201314888891-A
Country	US
Kind code	B2
Filing date	Sep 2, 2013
Priority date	Sep 2, 2013
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A travel control device ( 1 ) provided to a vehicle travel device ( 100 ) performs correction calculation of the rate of change of a requested acceleration using a relatively small value when the rate of change of the requested acceleration obtained from an angle sensor ( 2 ) is small, and performs correction calculation of the rate of change of the requested acceleration using a relatively large value when the rate of change of the requested acceleration obtained from the angle sensor ( 2 ) is large.

First claim

The invention claimed is:

1. A vehicle travel device comprising: a motor; a tire that rotates by the power from the motor; a braking device that can decrease the rotation speed of the tire; a sensor for detecting an acceleration requested by a driver; and a travel control device that transmits/receives a signal to/from the braking device and to/from the sensor and controls the motor or the braking device,
wherein, when the rate of change of a requested acceleration obtained from the sensor is less than a predetermined amount, the travel control device performs correction calculation of the rate of change of the requested acceleration with a value less than a predetermined set value; and when the rate of change of the requested acceleration obtained from the sensor is more than or equal to the predetermined amount, the travel control device performs correction calculation of the rate of change of the requested acceleration with a value more than or equal to the set value.

2. The vehicle travel device according to claim 1 , wherein, when the rate of change of the requested acceleration obtained from the sensor is less than a predetermined amount, the vehicle travel device performs correction calculation of the rate of change of the requested acceleration with a multiplier of less than one; and when the rate of change of the requested acceleration is more than or equal to the predetermined amount, the vehicle travel device performs correction calculation of the rate of change of the requested acceleration with a multiplier of one or more.

3. The vehicle travel device according to claim 1 , wherein when the rate of change of the requested acceleration obtained from the sensor has a negative value, the vehicle travel device does not correct the rate of change of the requested acceleration and uses as a calculated value of the rate of change of the requested acceleration.

4. The vehicle travel device according to claim 1 , wherein the vehicle travel device controls the braking force of the braking device based on the calculated requested acceleration.

5. The vehicle travel device according to claim 1 , wherein the vehicle travel device controls the power of the motor based on the calculated requested acceleration.

6. The vehicle travel device according to claim 1 , wherein the braking device is an electric generator installed in the power transmission path from the motor to the tire and controls the power generation torque of the generator based on the calculated requested acceleration.

7. The vehicle travel device according to claim 1 , wherein the braking device is a generator motor installed in the power transmission path from the motor to the tire and controls the power generation torque or driving torque of the generator motor based on the calculated requested acceleration.

8. A vehicle travel control method comprising: a motor; a tire that rotates by the power from the motor; a braking device that can decrease the rotation speed of the tire; a sensor for detecting an acceleration requested by a driver; and a travel control device that transmits/receives a signal to/from the braking device and to/from the sensor and controls the motor and the braking device,
wherein, when the rate of change of a requested acceleration obtained from the sensor is less than a predetermined amount, the travel control method performs correction calculation of the rate of change of the requested acceleration with a value less than a predetermined set value; and when the rate of change of the requested acceleration obtained from the sensor is more than or equal to the predetermined amount, the travel control method performs correction calculation of the rate of change of the requested acceleration with a value more than or equal to the set value.

Assignees

• Mitsubishi Electric Corp

Inventors

• Kamioka Nozomu
• Sagayama Noriya
• Wachi Satoshi
• Date Toshiaki

Classifications

• B60W30/18109

  Braking · CPC title

• B60W2540/10

  Accelerator pedal position · CPC title

• B60W2510/18

  Braking system · CPC title

• B60W50/087 Primary

  where the control system corrects or modifies a request from the driver · CPC title

• B60T8/175

  Brake regulation specially adapted to prevent excessive wheel spin during vehicle acceleration, e.g. for traction control (safety devices for propulsion unit control responsive to, or preventing, skidding of wheels B60K28/16) · CPC title