Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters
Patent
1977-04-01
1978-11-21
Lazarus, Ira S.
Internal-combustion engines
Accessories
Covers, trays, vibrators, corrosion inhibitors, air filters
123 4115, F02B 7700
Patent
active
041261143
ABSTRACT:
In a liquid cooled engine or engine-driven accessory having an engine protection device for reducing the engine RPM to a safe level in response to a fluid pressure below an acceptable level, a temperature sensor valve continuously senses the operating temperature of the engine or engine-driven accessory and reduces the fluid pressure below the acceptable level of the engine protection device in response to an over-temperature condition or in response to a partial or complete loss of the liquid coolant.
The temperature sensor valve includes a temperature sensing tip which is coupled to the housing of the engine or engine-driven accessory. A heat receiving section of the temperature sensing tip receives heat from the housing and a heat dissipating section which protrudes into the coolant filled chamber transfers heat received from the heat receiving section into the coolant. The temperature sensing tip further includes an internal, longitudinally extending receptacle filled with a temperature responsive material which expands and contracts in response to the temperature of the temperature sensing tip. A partial or complete loss of coolant or an over-temperature condition will cause the temperature responsive material to expand and open a path in the temperature sensor valve which reduces the fluid pressure sensed by the engine protection device below the acceptable level and actuates the engine protection device to reduce the engine RPM to a safe level.
REFERENCES:
patent: 1300717 (1919-04-01), Fulton
patent: 3153403 (1964-10-01), Dobbs
patent: 3202143 (1965-08-01), Goodwin
patent: 3533391 (1970-10-01), Lockmuller
patent: 3590798 (1971-07-01), Goodwin
patent: 3680533 (1972-08-01), Sobershi
patent: 3763836 (1973-10-01), Guehr
patent: 3832982 (1974-09-01), Guehr
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