Vehicle control system

Patent metadata

Field	Value
Publication number	US-11807237-B2
Application number	US-202117473115-A
Country	US
Kind code	B2
Filing date	Sep 13, 2021
Priority date	Oct 9, 2020
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

A vehicle control system configured to control deceleration of a vehicle properly according to a driver's intention in one-pedal mode. In the one-pedal mode, a controller controls deceleration of the vehicle based on a deceleration level set in accordance with a speed of the vehicle. If the brake pedal is manipulated to decelerate the vehicle while the vehicle is operated in the one-pedal mode and an operating amount of an accelerator pedal falls within the decelerating range, the controller updates the deceleration level based on an operation of the brake pedal.

First claim

What is claimed is:

1. A vehicle control system that is applied to a vehicle comprising:
an accelerator pedal that is operated by a driver;
a brake device that applies a brake force to the vehicle;
a brake pedal that is operated by the driver to actuate the brake device; and
a detector that collects data relating to an operating condition and a travelling condition of the vehicle,
wherein the vehicle is accelerated by manipulating the accelerator pedal, and is decelerated by manipulating the accelerator pedal or the brake pedal,
in a case of accelerating and decelerating the vehicle by manipulating only the accelerator pedal, a deceleration of the vehicle is increased with a reduction in an operating amount of the accelerator pedal as long as the operating amount of the accelerator pedal falls within a decelerating range from zero to a predetermined switching amount, and an acceleration of the vehicle is increased with an increase in the operating amount of the accelerator pedal as long as the operating amount of the accelerator pedal falls within an accelerating range from the switching amount to a maximum amount,
the vehicle control system further comprising:
a controller that controls the acceleration and the deceleration of the vehicle based on the data collected by the detector, and
the controller is configured to
control the deceleration of the vehicle based on a deceleration level set in accordance with a speed of the vehicle while the vehicle is operated by manipulating only the accelerator pedal, and
update the deceleration level based on an operation of the brake pedal if the brake pedal is manipulated to decelerate the vehicle, while the vehicle is operated by manipulating only the accelerator pedal and the operating amount of the accelerator pedal falls within the decelerating range,
wherein the controller is further configured to update the deceleration level such that the deceleration of the vehicle is increased with a reduction in an operating amount of the brake pedal.

2. The vehicle control system as claimed in claim 1 , wherein the controller is further configured to update the deceleration level when the operating amount of the brake pedal is reduced equal to or less than a predetermined minimum reference value after decelerating the vehicle by manipulating the brake pedal.

3. The vehicle control system as claimed in claim 1 , wherein the controller is further configured to reduce a shifting amount to update the deceleration level with a reduction in the operating amount of the brake pedal.

4. The vehicle control system as claimed in claim 1 , wherein the controller is further configured to reduce a shifting rate to shift the deceleration level with a reduction in a returning speed of the brake pedal, when updating the deceleration level.

5. The vehicle control system as claimed in claim 4 , wherein the controller is further configured to start a calculation of the returning speed of the brake pedal when the operating amount of the brake pedal is reduced equal to or less than a predetermined value.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kim Jonggap
• Metsugi Hiromitsu

Classifications

• B60W30/18109 Primary

  Braking · CPC title

• B60W10/18

  including control of braking systems · CPC title

• B60W50/06

  Improving the dynamic response of the control system, e.g. improving the speed of regulation or avoiding hunting or overshoot · CPC title

• B60W2520/105

  Longitudinal acceleration · CPC title

• B60W2540/106

  Rate of change · CPC title