Trailer brake system

Patent metadata

Field	Value
Publication number	US-10894534-B2
Application number	US-201815892697-A
Country	US
Kind code	B2
Filing date	Feb 9, 2018
Priority date	Feb 12, 2017
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

The disclosure provides a trailer brake system that includes a sensor system and a brake control unit. The sensor system is supported by a trailer and includes at least one wheel speed sensor associated with each wheel of the trailer. The brake control unit is supported by the trailer and is in communication with a tow vehicle configured to tow the trailer. The brake control unit is configured to: receive sensor data from the sensor system, and receive a brake signal from the tow vehicle indicative of a driver pressing a brake pedal of the tow vehicle. The brake control unit is also configured to: determine, for each brake, a hydraulic pressure based on the sensor data and the brake signal; and apply pressure by way of brake lines to the brake associated with each wheel, based on the hydraulic pressure.

First claim

What is claimed is:

1. A trailer brake system comprising:
a sensor system supported by a trailer, the sensor system comprising at least one wheel speed sensor associated with each wheel of the trailer;
a brake control unit supported by the trailer and in communication with a tow vehicle configured to tow the trailer, the brake control unit configured to:
receive sensor data from the sensor system;
receive a brake signal from the tow vehicle indicative of a driver pressing a brake pedal of the tow vehicle;
determine, for each brake, a hydraulic pressure based on the sensor data and the brake signal; and
apply pressure by way of brake lines to the brake associated with each wheel, based on the hydraulic pressure;

a first connector having a first end releasably connected to the tow vehicle and a second end releasably connected to the trailer, the first connector transmitting the brake signal to the brake control unit; and
a second connector having a first end releasably connected to the tow vehicle and a second end releasably connected to the trailer, the second connector configured to link a brake system of the tow vehicle and the brake control unit of the trailer, causing the brake system of the tow vehicle and the brake control unit to execute the same behaviors.

2. The trailer brake system of claim 1 , wherein the brake control unit executes a behavior before applying pressure by way of the brake lines to the brake associated with each wheel, the behavior determining a pressure value applied to each brake.

3. The trailer brake system of claim 2 , wherein the behavior includes one or more of a braking behavior, an anti-lock behavior, an electronic stability control behavior, a hill-start assist behavior, and a hill-hold assist behavior.

4. The trailer brake system of claim 1 , wherein the sensor data received from the sensor system comprises at least one of speed sensor data associated with each wheel, wheel travel data associated with each wheel, trailer distance from a surface.

5. The trailer brake system of claim 1 , wherein the brake control unit comprises:
a hydraulic pump configured to apply pressure by way of the brake line to the brakes associated with each wheel; and
a hydraulic and electric control unit in communication with the hydraulic pump and the sensor system and having a computing processor processing data received from the sensor system, the hydraulic and electric control unit determining the hydraulic pressure for each brake.

6. A method for controlling a trailer brake system, the method comprising:
receiving, at a brake control unit supported by a trailer, sensor data from one or more sensors, each sensor associated with a wheel of the trailer;
receiving, at the brake control unit, a brake signal from a tow vehicle configured to tow the trailer, the brake signal indicative of a driver of the tow vehicle pressing a brake pedal of the tow vehicle;
receiving, at the brake control unit, tow vehicle data;
transmitting, from the brake control unit to the tow vehicle, trailer data; wherein receiving tow vehicle data and transmitting trailer data causes the tow vehicle and the trailer to act as a braking system; and
executing, by the brake control unit, a behavior based on the sensor data, the behavior causing the brake control unit to adjust a hydraulic pressure to each wheel of the trailer.

7. The method of claim 6 , wherein the behavior includes one or more of a braking behavior, an anti-lock behavior, an electronic stability control behavior, a hill-start assist behavior, and a hill-hold assist behavior, each behavior determining a pressure value applied to each brake.

8. The method of claim 6 , wherein the sensor data received from one or more sensors comprises at least one of speed sensor data associated with each wheel, wheel travel data associated with each wheel, trailer distance from a surface.

9. The method of claim 6 , wherein executing the behavior based on the sensor data, comprises:
determining for each brake, a hydraulic pressure based on the sensor data and the brake signal; and
applying hydraulic pressure by way of brake lines to the brake associated with each wheel, based on the hydraulic pressure.

10. A trailer brake system comprising:
a sensor system disposed on a trailer having wheels, the sensor system comprising at least one wheel speed sensor associated with a wheel of the trailer;
a hydraulic pump supported by the trailer and configured to apply pressure by way of a brake line to a brake associated with each one of the wheels when receiving a brake signal from a tow vehicle in communication with the hydraulic pump;
a hydraulic and electric control unit in communication with the hydraulic pump and the sensor system and having a computing processor processing data received from the sensor system, the hydraulic and electric control unit determining a hydraulic pressure applied to each brake based on data received from the sensor system when the hydraulic pump receives the brake signal;
a first connector having a first end releasably connected to the tow vehicle and a second end releasably connected to the trailer; the first connector transmitting a brake signal to the trailer; and
a second connector having a first end releasably connected to the tow vehicle and a second end releasably connected to the trailer, the second connector configured to link a brake system of the tow vehicle and the hydraulic and electric control unit of the trailer.

11. The trailer brake system of claim 10 , wherein the hydraulic pump receives the brake signal from the tow vehicle causing the hydraulic pump to apply pressure by way of the brake line to a brake associated with each one of the wheels.

12. The trailer brake system of claim 11 , wherein the hydraulic and electric control unit executes a behavior configured to determine the hydraulic pressure applied to each brake when the hydraulic pump applies pressure by way of brake line to a brake associated with each one of the wheels.

13. The trailer brake system of claim 10 , wherein the data received from the sensor system comprises at least one of speed sensor data associated with each wheel, wheel travel data associated with each wheel, trailer distance from a surface.

14. The trailer brake system of claim 10 , wherein the hydraulic and electric control unit is configured to:
receive data from the sensor system indicative of a wheel speed associated with each wheel; and
execute a behavior based on the wheel speed of each wheel, the behavior being one of a braking behavior, an anti-lock behavior, an electronic stability control behavior, a hill start assist behavior, or a hill hold assist behavior.

Assignees

• Continental automotive systems inc

Inventors

• Hiller Ralf

Classifications

• B60T2250/00

  Monitoring, detecting, estimating vehicle conditions · CPC title

• B60T8/326

  Hydraulic systems · CPC title

• B60T2240/00

  Monitoring, detecting wheel/tyre behaviour; counteracting thereof · CPC title

• B60T2201/06

  Hill holder; Start aid systems on inclined road · CPC title

• B60T8/176

  Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS (B60T8/1755 takes precedence) · CPC title