초록 ▼

An electronically controlled brake system includes a brake actuator wherein a valve is electrically controlled to maintain the spring chamber in the non-actuated position during normal operation. However, should there be a failure in the electrical system, then the spring chamber is allowed to set t

An electronically controlled brake system includes a brake actuator wherein a valve is electrically controlled to maintain the spring chamber in the non-actuated position during normal operation. However, should there be a failure in the electrical system, then the spring chamber is allowed to set the brake actuator. The "failure" could also include a diagnostic system included in the control which identifies a failure in control operation. In this way, should there be an electrical failure, either in the control or power circuits, the truck is stopped.

대표청구항 ▼

[ What is claimed is:] [1.]1. An electronically controlled braking system comprising:an operator input device for requesting braking;a control unit for receiving an electric signal from said operator input device, and selectively supply air to a service chamber of a brake actuator;a source of power

[ What is claimed is:] [1.]1. An electronically controlled braking system comprising:an operator input device for requesting braking;a control unit for receiving an electric signal from said operator input device, and selectively supply air to a service chamber of a brake actuator;a source of power for said electronically controlled braking system;a valve for selectively controlling air supply to a spring chamber under normal operational conditions; andsaid valve for blocking a flow of air to a spring chamber of said brake actuator in the event that there is an electrical failure in said electronically controlled braking system, said control unit having a diagnostic self-check which can send a signal to said valve to evacuate said spring chamber in the event that said diagnostic self-check detects a failure.