Coolant loss valve for engine protective system

Details Coolant loss valve for engine protective system Coolant loss valve for engine protective system

1987-07-28

1988-06-21

Nelli, Raymond A.

Internal-combustion engines

Cooling

Automatic coolant flow control

236 345, F01P 714, F01P 716

Patent

active

047518987

ABSTRACT:
An improved valve, responsive to the loss of coolant under pressure in a diesel engine or the like, to open and allow fluid flow downstream with a consequent loss in fluid pressure, which is recognized by a pressure sensitive fuel valve supplying fuel flow to the engine. The coolant loss valve includes a three-part housing having the periphery of an elastomeric rolling diaphragm trapped between two housing parts and forming a coolant chamber. A spring-loaded piston and pin assembly transmit diaphragm movement, the pin forming a valve controlling fluid flow through a die cast aluminum head structure which is the third part of the housing. A stainless steel pin is used for corrosion resistance and is supported for axial movement in a dual quad ring seal and sleeve structure.

REFERENCES:
patent: 3877455 (1975-04-01), Goodwin
patent: 4140089 (1979-02-01), Kueny et al.
patent: 4327673 (1982-05-01), Schroeder
patent: 4359972 (1982-11-01), Calkins
patent: 4386584 (1983-06-01), Calkins
patent: 4674449 (1987-06-01), Hundertmark
"CL-79" Model Parts List by Sentinel Mfg. Co., Inc. (1984).

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