Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1998-05-26
2000-09-05
Rivell, John
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
25112916, 73119A, F16K 3700, F02M 5100
Patent
active
061127655
ABSTRACT:
In one embodiment of the present invention a method for monitoring operation of a solenoid actuated gaseous fuel admission valve is provided by measuring the resistance across a movable metering plate and a stationary plate in the valve. The plates are constructed with electro-conductive material and the plates comprise a variable resistor. The resistance value across the plates changes as a function as to whether the plates are contacting, not contacting, or there is contamination between them. A converter circuit produces a resistive signal that is indicative of the resistance value of the variable resistor. Processing means receives the resistive signal and responsively determines whether the valve is operating within predetermined performance parameters. A signal may be produced to drive an indicator to show whether the valve is functioning properly.
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Caterpillar Inc.
Digirolamo Samuel
Rivell John
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