Method, system and controller for determining whether to brake a trailer
First Claim
1. A controller for a trailer service brake system comprising:
- An input for receiving a stop lamp signal from an associated tractor;
An input for receiving a control line pressure signal of the trailer;
A control output for transmitting a braking control signal; and
Control logic capable of;
receiving the stop lamp signal, wherein the stop lamp signal is on in response to a driver depressing the brake pedal on the associated tractor to achieve a brake pressure greater than or equal to a stop lamp pressure threshold;
receiving the control line pressure signal;
transmitting the braking control signal in response to the stop lamp signal indicating the stop lamp is on and the control line pressure signal indicating the control line pressure is less than the stop lamp pressure threshold; and
determining not to transmit the braking control signal in response to the control line pressure being greater than or equal to the stop lamp pressure threshold within a predetermined time period prior to receiving the stop lamp signal indicating the stop lamp is on and the control line pressure signal indicating the control line pressure is less than the stop lamp pressure threshold.
0 Assignments
0 Petitions
Accused Products
Abstract
Various embodiments of a method, system and controller for determining whether to actuate the service brakes of a trailer are disclosed. In accordance with one aspect, the controller includes an input for receiving a stop lamp signal from an associated tractor, an input for receiving a control line pressure signal of the trailer, a control output for transmitting a braking control signal and control logic. The method includes receiving a stop lamp signal, receiving a control line pressure signal and determining whether to transmit a braking control signal to the service brakes of the trailer in response to the stop lamp signal being on and the control line pressure signal being less than a pressure threshold.
48 Citations
28 Claims
-
1. A controller for a trailer service brake system comprising:
-
An input for receiving a stop lamp signal from an associated tractor; An input for receiving a control line pressure signal of the trailer; A control output for transmitting a braking control signal; and Control logic capable of; receiving the stop lamp signal, wherein the stop lamp signal is on in response to a driver depressing the brake pedal on the associated tractor to achieve a brake pressure greater than or equal to a stop lamp pressure threshold; receiving the control line pressure signal; transmitting the braking control signal in response to the stop lamp signal indicating the stop lamp is on and the control line pressure signal indicating the control line pressure is less than the stop lamp pressure threshold; and determining not to transmit the braking control signal in response to the control line pressure being greater than or equal to the stop lamp pressure threshold within a predetermined time period prior to receiving the stop lamp signal indicating the stop lamp is on and the control line pressure signal indicating the control line pressure is less than the stop lamp pressure threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A system for determining whether to brake a trailer comprising:
-
A pressure sensor for sensing a control line pressure; An electropneumatic device for delivering braking pressure to the trailer service brake system; and A controller comprising; An input for receiving a stop lamp signal from an associated tractor; An input for receiving the control line pressure signal from the pressure sensor; A control output for transmitting a braking control signal to the electropneumatic device; and Control logic capable of;
receiving the stop lamp signal;
receiving the control line pressure signal; and
not transmitting the braking control signal in response to the control line pressure being greater than or equal to a stop lamp pressure threshold within a predetermined time period prior to receiving the stop lamp signal indicating the stop lamp is on and the control line pressure signal indicating the control line pressure is less than a stop lamp pressure threshold. - View Dependent Claims (10, 11, 12)
-
-
13. A controller for a trailer service brake system comprising:
- An input for receiving a stop lamp signal from an associated tractor;
An input for receiving a control line pressure signal on the trailer;
A control output for transmitting a braking control signal; and
Control logic capable of;
receiving the stop lamp signal;
receiving the control line pressure signal; and
determining not to transmit the braking control signal in response to the control line pressure being greater than or equal to a stop lamp pressure threshold within a predetermined time period prior to receiving the stop lamp signal indicating the stop lamp is on and the control line pressure signal indicating the control line pressure is less than the stop lamp pressure threshold. - View Dependent Claims (14, 15)
- An input for receiving a stop lamp signal from an associated tractor;
-
16. A method for determining whether to actuate the service brakes of a trailer comprising:
-
Receiving a stop lamp signal;
wherein the stop lamp signal is on in response to a driver depressing the brake pedal on the associated tractor to achieve a brake pressure greater than or equal to a stop lamp pressure threshold;Receiving a control line pressure signal; Determining whether to transmit a braking control signal to the service brakes of the trailer in response to the stop lamp signal and the control line pressure signal;
wherein determining whether to transmit the braking control signal comprises;
transmitting a braking control signal in response to the stop lamp signal indicating the stop lamp is on and the control line pressure signal indicating the control line pressure is less than the stop lamp pressure threshold; anddetermining not to transmit the braking control signal in response to the control line pressure being greater than or equal to the stop lamp pressure threshold within a predetermined time period prior to receiving the stop lamp signal indicating the stop lamp is on and the control line pressure signal indicating the control line pressure is less than the stop lamp pressure threshold. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
Specification