Activation of Brake Lights in Case of an Ignition Failure
Publication Date: 2004-Apr-07
The IP.com Prior Art Database
To ensure that the brake lights are lit up also in case of an ignition failure (e.g. X15/15), an engine control unit produces engine-run messages as long as the engine’s rotation speed exceeds a threshold value representing particular number of revolutions per minute. The engine-run messages are sent to a central control unit, which in response thereto transmits activation messages to relevant control units for the service brakes, and any other brake or retardation systems, as well as to a control unit for the brake lights. Thereby, the control units for the brakes, the retardation systems and the brake lights remain activated as long as the engine’s rotation speed exceeds the threshold value.