OIL_PRESSURE_ACTUATED_RUNNING_LIGHTS

Published:2009/7/13 4:03:00 Author:May | From:SeekIC

Motorcycles and cars that are not equipped with (automatic) day running lights can be so equipped with the present circuit. The circuit is connected to the oil-pressure indicator. When the engine is not running, the contacts of the oil-pressure sensor in the engine block are closed. When the ignition is then switched on, the oil-pressure light comes on. The potential at A is then low, and nothing happens. When the engine is running, oil-pressure builds up, whereupon the contacts open and the indicator light goes out. The potential at A is then high so that T1 comes on and the relay becomes energized. The relay contact in series with the headlights closes so that the headlight is switched on. When the engine is switched off, the relay is deenergized and the headlights go out.



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