Vehicle parking interlock system and method

Patent metadata

Field	Value
Publication number	US-9849863-B2
Application number	US-201514704753-A
Country	US
Kind code	B2
Filing date	May 5, 2015
Priority date	May 9, 2014
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A parking interlock system and method for a vehicle is provided. The system includes: a safety state information detecting unit, configured to detect safety state information of the vehicle; an operating state information detecting unit, configured to detect operating state information of the vehicle; a brake; a motor; a low voltage controller, connected to the safety state information detecting unit and the brake respectively, and configured to generate a safety state judgment result based on the safety state information of the vehicle; and a motor controller, connected to the safety state information detecting unit and the motor respectively, and configured to control the motor according to the safety state judgment result received from the low voltage controller, and to send the operating state information of the vehicle to the low voltage controller such that the low voltage controller controls the brake according to the operating state information.

First claim

What is claimed is:

1. A parking interlock system of a vehicle, comprising:
a safety state information detecting unit, configured to detect safety state information of the vehicle;
an operating state information detecting unit, configured to detect operating state information of the vehicle;
a brake;
a motor;
a controller, connected to the safety state information detecting unit and the brake, respectively, and configured to generate a safety state judgment result based on the safety state information of the vehicle; and
a motor controller, connected to the controller, the operating state information detecting unit and the motor, respectively, and configured to receive the safety state judgment result from the controller, to control the motor according to the safety state judgment result, and to send the operating state information of the vehicle to the controller,
wherein
the controller is configured to control the brake to lock the vehicle at an end of a first predetermined non-zero period during which the operating state information indicates that the vehicle's speed and motor torque simultaneously remains zero,
the motor controller is configured to generate and send a motor starting instruction to the controller after the first predetermined non-zero period,
the motor controller is configured to, subsequent to sending the motor starting instruction to the controller, control the motor to start after a second predetermined non-zero period, and
the controller is further controlled to, subsequent to receiving the motor starting instruction from the motor controller, control the brake to unlock the vehicle according to the motor starting instruction within a third predetermined non-zero period,
wherein the third predetermined non-zero period is less than the second predetermined non-zero period such that the vehicle is unlocked before the motor is started.

2. The system according to claim 1 , wherein the safety state information of the vehicle comprises at least one of charging gun state information, disabled guide state information, door state information, and ECAS state information, and the operating state information of the vehicle comprises vehicle speed information and torque information.

3. The system according to claim 1 , further comprising:
a handbrake detecting unit configured to detect a state of a handbrake, and to generate a warning when the vehicle is powered off and the handbrake is not pulled.

4. The system according to claim 1 , further comprising:
an emergency unlocking unit for unlocking the brake when the emergency unlocking unit is triggered.

5. A parking interlock method for a vehicle, comprising:
detecting, by a safety state information detecting unit, safety state information of the vehicle;
detecting, by an operating state information detecting unit, operating state information of the vehicle;
generating, by a controller, a safety state judgment result based on the safety state information of the vehicle provided by the safety state information detecting unit to the controller;
controlling, by the controller, a brake according to the operating state information of the vehicle provided by the operating state information detecting unit to the controller via a motor controller; and
controlling, by the motor controller, a motor according to the safety state judgment result provided by the controller to the motor controller,
wherein controlling, by the controller, the brake according to the operating state information of the vehicle and controlling, by the motor controller, the motor according to the safety state judgment result comprises further comprising:
controlling, by the controller, the brake to lock the vehicle at an end of a first predetermined non-zero period during which the operating state information indicates that the vehicle's speed and motor torque simultaneously remains zero,
generating and sending, by the motor controller, a motor starting instruction to the controller after the first predetermined non-zero period;
controlling, by the motor controller, subsequent to sending the motor starting instruction to the controller, the motor to start after a second predetermined non-zero period; and
controlling, by the controller, subsequent to receiving the motor starting instruction from the motor controller, the brake to unlock the vehicle according to the motor starting instruction within a third predetermined non-zero period,
wherein the third predetermined non-zero period is less than the second predetermined non-zero period such that the vehicle is unlocked before the motor is started.

6. The method according to claim 5 , wherein the safety state information of the vehicle comprises at least one of charging gun state information, disabled guide state information, door state information, and ECAS state information, and the operating state information of the vehicle comprises vehicle speed information and torque information.

7. The method according to claim 5 , further comprising:
detecting a state of a handbrake; and
generating a warning when the vehicle is powered off and the handbrake is not pulled.

8. The method according to claim 5 , further comprising:
unlocking the brake when an emergency unlocking instruction is received.

Assignees

• Byd Co Ltd

Inventors

• Si Wenkui
• Pan Caihua
• Luo Wengang
• Wu Jun

Classifications

• B60T17/221

  Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems (hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M) · CPC title

• B60W2520/04

  Vehicle stop · CPC title

• F02N11/08

  Circuits specially adapted for starting of engines · CPC title

• B60T17/18

  Safety devices; Monitoring · CPC title

• B60W40/00

  Estimation or calculation of {non-directly measurable} driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, {e.g. by using mathematical models} · CPC title