VEHICLE CONTROL SYSTEM

• US 20200130673A1
• Filed: 09/26/2019
• Published: 04/30/2020
• Est. Priority Date: 10/25/2018
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: SUZUKI, Yusuke
• Granted Patent: US 11,124,174 B2
• Time in Patent Office: Days
• CPC Class Codes: B60W 10/18 including control of braking systems
• CPC Class Codes: B60W 20/19 for achieving enhanced acceleration
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/106 Rate of change
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 30/18027 Drive off, accelerating from standstill
• CPC Class Codes: B60W 30/188 Controlling power parameters of the driveline, e.g. determining the required power
• CPC Class Codes: B60W 50/06 Improving the dynamic response of the control system, e.g. improving the speed of regulation or avoiding hunting or overshoot
• CPC Class Codes: B60W 50/10 Interpretation of driver requests or demands

Abstract

A vehicle control system to control acceleration in line with the driver'"'"'s intention when depressing one of an accelerator pedal and a brake pedal after releasing the other one of the pedals in one-pedal mode. The vehicle control system is configured to obtain an operating speed of one of an accelerator pedal and a brake pedal returned to an initial position, set a target acceleration based on an operating amount of the other pedal depressed after releasing said one of the pedals, and increase a correction amount to correct the target acceleration if the operating speed of the returned pedal is fast.

Claims

1. A vehicle control system, that is applied to a vehicle that can be propelled in one-pedal mode in which a braking force is applied to the vehicle by manipulating a brake pedal, and a driving force and the braking force are controlled by manipulating an accelerator pedal to accelerate and decelerate the vehicle, comprising:

a detector that collects data relating to operating states of the accelerator pedal and the brake pedal; and

a controller that is configured to

set a target acceleration to control the driving force and the braking force based on the data collected by the detector,

obtain an operating speed of one of the accelerator pedal and the brake pedal returned to an initial position in a case of depressing the other one of the accelerator pedal and the brake pedal after releasing said one of the accelerator pedal and the brake pedal,

set the target acceleration based on an operating amount of the pedal depressed after releasing said one of the accelerator pedal and the brake pedal, and

increase a correction amount to correct the target acceleration if the operating speed of the pedal returned to an initial position is fast.

2. The vehicle control system as claimed in claim 1, wherein the controller is further configured to

obtain an operating speed of the brake pedal returned to the initial position in a case of depressing the accelerator pedal after releasing the brake pedal,

set the target acceleration based on an operating amount of the accelerator pedal depressed after releasing the brake pedal, and

correct the target acceleration to reduce deceleration of the vehicle if the operating speed of the brake pedal is fast.

3. The vehicle control system as claimed in claim 1, wherein the controller is further configured to

obtain an operating speed of the accelerator pedal returned to the initial position in a case of depressing the brake pedal after releasing the accelerator pedal,

set the target acceleration based on an operating amount of the brake pedal depressed after releasing the accelerator pedal, and

correct the target acceleration to increase deceleration of the vehicle if the operating speed of the accelerator pedal is fast.

4. The vehicle control system as claimed in claim 1, wherein the controller is further configured to

correct the target acceleration only within a decelerating range where the target acceleration is a negative value, and

control acceleration of the vehicle based on a normal target acceleration set in accordance with an operating amount of the accelerator pedal or the brake pedal instead of the corrected target acceleration during accelerating the vehicle, after correcting the target acceleration within the decelerating range.

5. The vehicle control system as claimed in claim 2, wherein the controller is further configured to

correct the target acceleration only within a decelerating range where the target acceleration is a negative value, and

control acceleration of the vehicle based on a normal target acceleration set in accordance with an operating amount of the accelerator pedal or the brake pedal instead of the corrected target acceleration during accelerating the vehicle, after correcting the target acceleration within the decelerating range.

6. The vehicle control system as claimed in claim 3, wherein the controller is further configured to

correct the target acceleration only within a decelerating range where the target acceleration is a negative value, and

control acceleration of the vehicle based on a normal target acceleration set in accordance with an operating amount of the accelerator pedal or the brake pedal instead of the corrected target acceleration during accelerating the vehicle, after correcting the target acceleration within the decelerating range.

7. The vehicle control system as claimed in claim 1, wherein the controller is further configured to reduce the correction amount of the target acceleration gradually toward zero during a period from a point at which a correction of the target acceleration is completed after releasing the one of the accelerator pedal and the brake pedal to a point at which the other one of the accelerator pedal and the brake pedal is depressed.

8. The vehicle control system as claimed in claim 2, wherein the controller is further configured to reduce the correction amount of the target acceleration gradually toward zero during a period from a point at which a correction of the target acceleration is completed after releasing the one of the accelerator pedal and the brake pedal to a point at which the other one of the accelerator pedal and the brake pedal is depressed.

9. The vehicle control system as claimed in claim 3, wherein the controller is further configured to reduce the correction amount of the target acceleration gradually toward zero during a period from a point at which a correction of the target acceleration is completed after releasing the one of the accelerator pedal and the brake pedal to a point at which the other one of the accelerator pedal and the brake pedal is depressed.

10. The vehicle control system as claimed in claim 4, wherein the controller is further configured to reduce the correction amount of the target acceleration gradually toward zero during a period from a point at which a correction of the target acceleration is completed after releasing the one of the accelerator pedal and the brake pedal to a point at which the other one of the accelerator pedal and the brake pedal is depressed.

11. The vehicle control system as claimed in claim 5, wherein the controller is further configured to reduce the correction amount of the target acceleration gradually toward zero during a period from a point at which a correction of the target acceleration is completed after releasing the one of the accelerator pedal and the brake pedal to a point at which the other one of the accelerator pedal and the brake pedal is depressed.

12. The vehicle control system as claimed in claim 6, wherein the controller is further configured to reduce the correction amount of the target acceleration gradually toward zero during a period from a point at which a correction of the target acceleration is completed after releasing the one of the accelerator pedal and the brake pedal to a point at which the other one of the accelerator pedal and the brake pedal is depressed.