Pressure ratio valve

Details Pressure ratio valve Pressure ratio valve

1977-03-18

1978-07-18

Lazarus, Ronald H.

Internal-combustion engines

Lubricators

Crankcase, pressure control

184 64, 123198D, 123198DB, F01M 100, F01M 118

Patent

active

041009100

ABSTRACT:
A pressure ratio valve is installed in an engine having an engine protection means for reducing the engine RPM to a safe level in response to an engine oil pressure below an acceptable level. The engine further includes a fuel pump for supplying fuel at a pressure linearly related to the engine RPM. The pressure ratio valve continuously senses both the oil pressure and the fuel pressure of the engine and reduces the engine oil pressure below the acceptable level of the engine protection means in response to a fuel pressure-oil pressure ratio in excess of a predetermined magnitude. This action by the pressure ratio valve causes the engine protection means to reduce the engine RPM to a safe level.

REFERENCES:
patent: 3590798 (1971-07-01), Goodwin
patent: 3913551 (1975-10-01), Shaver

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