Oil pressure failure protection device for internal combustion engines
OwnerHoward J. Palmer, James R. Bechardinventors
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Abstract
A device for slowing an internal combustion engine in the event of oil pressure failure at an engine speed above idle, includes an SCR with the gate thereof connected to an engine rpm sensor which provides a voltage analog of engine speed. The SCR is connected between an oil pressure sensing switch typically provided for the engine, and the ignition distributor points. Should the oil pressure switch close, indicating low oil pressure, and the engine is turning at sufficient speed so that the rpm sensor provides enough voltage to the SCR gate, the SCR will fire and short the ignition.
Claims8
An engine malfunction protection device, comprising normally open engine malfunction sensing switch means having one pole connected to ground;
- a controlled switching means for limiting engine speed having one electrode connected to the other pole of said engine malfunction sensing switch means and another electrode connected to the spark forming portion of the engine ignition circuit;
- engine speed sensing means for generating an output signal analog of the speed of the engine, said output signal connected to the actuator of said controlled switching means, said actuator having a predetermined triggering threshold;
- and electrical power supply means, said engine speed sensing means being normally unpowered and connected directly to one side of said power supply means and connected through said engine malfunction sensing switch means to the other side of said power supply means.
Dependencies are inferred from the claim text.