Stop maintaining system of vehicle

Patent metadata

Field	Value
Publication number	US-10358120-B2
Application number	US-201615299751-A
Country	US
Kind code	B2
Filing date	Oct 21, 2016
Priority date	Nov 13, 2015
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A vehicle stop maintaining system is provided, which includes a foot brake mechanism for braking vehicle wheels by applying hydraulic brake pressure according to brake pedal depression, a brake force control mechanism for braking the wheels by controlling a pressurizer, an electric parking brake mechanism for braking the wheels by operating an electric brake mechanism, and a controller comprising a processor for entering a first stop mode when a vehicle stopped state is detected. The processor executes a first determining module for determining existence of an interruptive factor, and a second determining module for determining a failure of the electric parking brake mechanism. If the interruptive factor exists, the controller executes a second stop mode. If the electric parking brake mechanism is determined as failed under the second stop mode, the controller operates a notification device for issuing a notification to a vehicle driver.

First claim

What is claimed is:

1. A vehicle stop maintaining system including a foot brake mechanism for braking vehicle wheels by applying hydraulic brake pressure to hydraulic brake mechanisms according to depression of a brake pedal, a brake force control mechanism having a pressurizer that increases hydraulic brake pressure to be applied to the hydraulic brake mechanisms, and for braking the vehicle wheels by controlling the pressurizer independently from the depression of the brake pedal, an electric parking brake mechanism for braking the vehicle wheels by operating an electric brake mechanism that is driven by an electric actuator independently from the depression of the brake pedal, and a controller comprising a processor configured to enter a first stop mode in which the brake force control mechanism is operated to maintain a stopped state when the vehicle is detected to be in the stopped state, the processor configured to execute:
a first determining module and a second determining module stored as software in non-volatile memory;
the first determining module for determining a state where the stopped state of the vehicle cannot be maintained; and
the second determining module for determining a failure of the electric parking brake mechanism;
the system further comprising a notification device for issuing a notification to a vehicle driver,
wherein if the first determining module determines that the vehicle is in the state where the stopped state of the vehicle cannot be maintained, the controller enters a second stop mode in which the electric parking brake mechanism is operated to maintain the stopped state,
wherein if the first determining module does not determine the state where the stopped state of the vehicle cannot be maintained under the first stop mode, the controller is prohibited from operating the notification device, and
wherein if the first determining module determines that the vehicle is in the state where the stopped state of the vehicle cannot be maintained and if the second determining module determines the electric parking brake mechanism has failed under the second stop mode, the controller operates the notification device.

2. The system of claim 1 , wherein the state where the stopped state of the vehicle cannot be maintained includes an interruptive factor that causes an interruption of proper traveling, and the interruptive factor includes at least one of a failure of the brake force control mechanism, the brake force control mechanism being operated over a predetermined period of time, an absence of the driver from a driver's seat, and an engine misfire.

3. The system of claim 2 , wherein when the driver depresses an accelerator pedal in the first stop mode, the controller cancels the first stop mode.

4. The system of claim 3 , wherein when the driver depresses the brake pedal within a given period in the second stop mode, the controller stops the operation of the notification device.

5. The system of claim 4 , wherein when the given period in the second stop mode has elapsed in the second stop mode, the controller stops the operation of the notification device and cancels the first stop mode.

6. The system of claim 3 , wherein when a given period in the second stop mode has elapsed in the second stop mode, the controller stops the operation of the notification device and cancels the first stop mode.

7. The system of claim 2 , wherein when the driver depresses the brake pedal within a given period in the second stop mode, the controller stops the operation of the notification device.

8. The system of claim 7 , wherein when the given period in the second stop mode has elapsed in the second stop mode, the controller stops the operation of the notification device and cancels the first stop mode.

9. The system of claim 2 , wherein when a given period in the second stop mode has elapsed in the second stop mode, the controller stops the operation of the notification device and cancels the first stop mode.

10. The system of claim 1 , wherein when the driver depresses an accelerator pedal in the first stop mode, the controller cancels the first stop mode.

11. The system of claim 10 , wherein when the driver depresses the brake pedal within a given period in the second stop mode, the controller stops the operation of the notification device.

12. The system of claim 11 , wherein when the given period in the second stop mode has elapsed in the second stop mode, the controller stops the operation of the notification device and cancels the first stop mode.

13. The system of claim 10 , wherein when a given period in the second stop mode has elapsed in the second stop mode, the controller stops the operation of the notification device and cancels the first stop mode.

14. The system of claim 1 , wherein when the driver depresses the brake pedal within a given period in the second stop mode, the controller stops the operation of the notification device.

15. The system of claim 14 , wherein when the given period in the second stop mode has elapsed in the second stop mode, the controller stops the operation of the notification device and cancels the first stop mode.

16. The system of claim 1 , wherein when a given period in the second stop mode has elapsed in the second stop mode, the controller stops the operation of the notification device and cancels the first stop mode.

Assignees

• Mazda Motor

Inventors

• Takase Masaru
• Uehara Shigeyuki

Classifications

• B60T13/741

  acting on an ultimate actuator · CPC title

• B60T17/22

  Devices for monitoring or checking brake systems; Signal devices · CPC title

• B60T7/042

  by electrical means, e.g. using travel or force sensors · CPC title

• B60T7/122 Primary

  for locking of reverse movement · CPC title

• B60T2220/04

  Pedal travel sensor, stroke sensor; Sensing brake request · CPC title