Vehicle system having an esc-fault-tolerant braking system

Patent metadata

Field	Value
Publication number	US-12246701-B2
Application number	US-202218058620-A
Country	US
Kind code	B2
Filing date	Nov 23, 2022
Priority date	Jul 1, 2020
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

The disclosure relates to a vehicle system for a vehicle, in particular a commercial vehicle, that includes an electronically controllable pneumatic braking system, and an electronically controllable steering device. The electronically controllable pneumatic braking system has a redundant control unit, which controls the brake circuits in the event of a failure of an electronic stability control of the braking system during travel. In the event of the failure of the electronic stability control during travel, the redundant control unit performs axle-wise control of the front axle with a front axle redundancy brake pressure and/or of the rear axle with a rear axle redundancy brake pressure and the electronically controllable steering device carries out laterally stabilizing steering interventions in order to keep the vehicle in a tolerance corridor of a predefined target trajectory of the vehicle. The disclosure also relates to a vehicle and a method.

First claim

The invention claimed is:

1. A vehicle system for a vehicle, the vehicle system comprising:
an electronically controllable pneumatic braking system;
an electronically controllable steering device;
said electronically controllable pneumatic braking system having at least one first brake circuit, at least one second brake circuit, and an electronic central control unit for electronically controlling the first brake circuit and the second brake circuit;
said electronically controllable pneumatic braking system further having a plurality of front axle brake actuators including a first front axle brake actuator and a second front axle brake actuator for a first front wheel and a second front wheel at least at one front axle;
said electronically controllable pneumatic braking system further having a plurality of rear axle brake actuators including a first rear axle brake actuator and a second rear axle brake actuator for a first rear wheel and a second rear wheel at least at one rear axle;
said electronic central control unit being connected to an electronic stability control;
said electronic stability control being configured to wheel-individually actuate at least one of said plurality of front axle brake actuators and said plurality of rear axle brake actuators;
said electronically controllable pneumatic braking system further having a redundant electronic control unit configured to electronically control at least one of said first brake circuit and said second brake circuit in response to a failure of the electronic stability control during a trip of the vehicle;
wherein, in the event of the failure of the electronic stability control during the trip of the vehicle, said redundant electronic control unit is configured to perform axle-wise electronic control of at least one of the at least one front axle with a front axle redundancy brake pressure and the at least one rear axle with a rear axle redundancy brake pressure; and,
wherein said electronically controllable steering device is configured to carry out a laterally stabilizing steering intervention causing the vehicle to stay in a tolerance corridor of a predefined target trajectory of the vehicle.

2. The vehicle system of claim 1 , wherein said electronically controllable steering device receives at least one of a steering wheel angle and a steering torque as a target value for the laterally stabilizing steering interventions and is configured to correct said at least one of said steering wheel angle and said steering torque as a target value.

3. The vehicle system of claim 1 further comprising a redundant electronic stability control, said redundant electronic stability control being connected to said redundant electronic control unit and configured to provide redundant ESC signals at said redundant electronic control unit.

4. The vehicle system of claim 3 , wherein said electronically controllable steering device is connected to at least one of said redundant electronic control unit and said redundant electronic stability control for receiving redundant ESC signals.

5. The vehicle system of claim 1 , wherein said electronic central control unit is connected to a first voltage source and said redundant electronic control unit is connected to a second voltage source, the second voltage source being independent of the first voltage source.

6. The vehicle system of claim 5 , wherein said electronically controllable steering device or a portion of said electronically controllable steering device is connected to the second voltage source.

7. The vehicle system of claim 1 , wherein said redundant electronic control unit is connected to at least one of a plurality of first wheel speed sensors and a plurality of second wheel speed sensors for receiving wheel speed signals.

8. The vehicle system of claim 1 further comprising a parking brake circuit having a parking brake module connected to said electronic central control unit; and, at least a first spring-loaded actuator and a second spring-loaded actuator at least at the rear axle or a further rear axle, wherein said redundant electronic control unit forms an electronic control unit of said parking brake module or is integrated with said parking brake module.

9. The vehicle system of claim 1 , wherein, in the event of the failure of said electronic stability control, said redundant electronic control unit provides the front axle redundancy brake pressure at said first front axle brake actuator and said second front axle brake actuator during an axle-wise modulation of the front axle redundancy brake pressure, in order to brake the front axle in an axle-wise manner.

10. The vehicle system of claim 1 , wherein the vehicle is a commercial vehicle.

11. A vehicle system for a vehicle, the vehicle system comprising:
an electronically controllable pneumatic braking system;
an electronically controllable steering device;
said electronically controllable pneumatic braking system having at least one first brake circuit, at least one second brake circuit, and an electronic central control unit for electronically controlling the first brake circuit and the second brake circuit;
said electronically controllable pneumatic braking system further having a plurality of front axle brake actuators including a first front axle brake actuator and a second front axle brake actuator for a first front wheel and a second front wheel at least at one front axle;
said electronically controllable pneumatic braking system further having a plurality of rear axle brake actuators including a first rear axle brake actuator and a second rear axle brake actuator for a first rear wheel and a second rear wheel at least at one rear axle;
said electronic central control unit being connected to an electronic stability control;
said electronic stability control being configured to wheel-individually actuate at least one of said plurality of front axle brake actuators and said plurality of rear axle brake actuators;
said electronically controllable pneumatic braking system further having a redundant electronic control unit configured to electronically control at least one of said first brake circuit and said second brake circuit in response to a failure of the electronic stability control during a trip of the vehicle;
wherein, in the event of the failure of the electronic stability control during the trip of the vehicle, said redundant electronic control unit is configured to perform axle-wise electronic control of at least one of the at least one front axle with a front axle redundancy brake pressure and the at least one rear axle with a rear axle redundancy brake pressure;
wherein said electronically controllable steering device is configured to carry out a laterally stabilizing steering intervention causing the vehicle to stay in a tolerance corridor of a predefined target trajectory of the vehicle; and,
wherein said electronically controllable steering device is connected to said central control unit for receiving ESC signals from said electronic stability control or signals derived or processed from the ESC signals.

12. The vehicle system of claim 11 , wherein said electronically controllable steering device is connected to the redundant electronic control unit for receiving redundant ESC signals.

13. A method for decelerating and steering a vehicle, the method comprising:
ascertaining a failure of an electronic stability control of an electronically controllable pneumatic braking system;
in response to said ascertaining of the failure:
redundantly, and in an axle-wise manner, modulating at least one of a redundancy front axle brake pressure at least at one front axle and a redund

Assignees

• Zf Cv Systems Global Gmbh

Inventors

• Dieckmann Thomas
• Lülfing Ralph-Carsten
• Michaelsen Arne
• Munko Tobias
• Otremba Robert
• Van Thiel Julian

Classifications

• B60W2720/24

  Direction of travel · CPC title

• B60W2710/207

  Steering angle of wheels · CPC title

• B60W2710/202

  Steering torque · CPC title

• B60W2710/182

  Brake pressure, e.g. of fluid or between pad and disc · CPC title

• B60W2540/18

  Steering angle · CPC title