Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters
Patent
1977-01-14
1978-08-15
Myhre, Charles J.
Internal-combustion engines
Accessories
Covers, trays, vibrators, corrosion inhibitors, air filters
123DIG11, 123142, 123 97B, F02B 7700
Patent
active
041064690
ABSTRACT:
The specification discloses a motor kill system for automatically shutting off and killing an internal combustion engine to prevent damage to the engine from obstruction of the air cleaning system. The motor kill system includes a vacuum switch operating in response to a drop in the pressure between the air cleaning system and the intake manifold of the engine caused by obstruction of the air cleaning system. The preferred embodiment of the invention utilizes a normally open vacuum switch that closes to cause a solenoid to operate a butterfly valve to cut off the air supply to kill the engine. An alternate embodiment of the invention utilizes a normally closed vacuum switch which operates in response to obstruction of the air cleaning system to open the circuit between the ignition and the fuel pump to cut off the fuel supply and thereby kill the engine before any damage is done.
REFERENCES:
patent: 2084426 (1937-06-01), Berry
patent: 2253425 (1941-08-01), Garland
patent: 3528787 (1970-09-01), Hallberg
patent: 3533391 (1970-10-01), Lockmuller
patent: 3722492 (1973-03-01), Shibata
patent: 3867919 (1975-02-01), Grenier et al.
Lazarus Ira S.
Myhre Charles J.
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