Monitoring the operation of an internal combustion engine

Details Monitoring the operation of an internal combustion engine Monitoring the operation of an internal combustion engine

G - Physics

01

P

73/169, 340/56

G01P 15/08 (2006.01) G01M 15/00 (2006.01)

Patent

CA 1114204

ABSTRACT OF THE DISCLOSURE A monitoring device for monitoring the operation of a vehicle internal combustion engine having inlet ducting for admitting a fuel/air mixture into the engine comprises vacuum sensitive means for sensing the degree of vacuum in the inlet ducting, speed sensitive means for sensing the rotational speed of the engine, and warning means including gates, multivibrator circuitry, a loudspeaker, and a recorder. When the degree of vacuum falls below a predetermined vacuum value, warning bleeps are issued by the loudspeaker and recordings are made on the recorder. The warning means is operative in response to the vacuum sensitive means and the speed sensitive means to provide a predetermined vacuum value which is a stepwise increasing function of rotational speed sensed. An inclined mercury containing capsule is provided to inhibit bleeping and recording when the vehicle is inclined at more than a predetermined angle to the horizontal in the direction of travel of the vehicle.

338170

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