Measuring and testing – Simulating operating condition – Marine
Patent
1990-02-09
1991-05-14
Raevis, Robert
Measuring and testing
Simulating operating condition
Marine
G01M 1500
Patent
active
050145495
ABSTRACT:
The test apparatus for an electric air intake manifold heater system according to the present invention includes a mechanism for simulating a temperature signal of the heater system thermistor and inputting this signal into the thermistor input of the electronic control module of the heater system. The temperature signal simulating mechanism is selectively operable to simulate a predetermined portion of the range of operating temperatures for the system. The test apparatus also includes a volmeter which measures the complete system voltage. The voltmeter can alternately be connected to the electrical supply of a fuel pump cold start system valve, where provided, to observe the actuation voltage and verify the actuation cycle thereof. Color coded lights indicate proper actuation of the heater elements. The method according to the present invention includes connecting positive and negative tester leads to the respective terminals of the heater system power supply and measuring the heater system voltage during actuation cycles. The tester leads may alternately be connected to the cold start system valve electrical supply connection to measure the actuation voltage thereof. Additional tester leads are connected to the relays of the heater system to detect heater element actuation. A signal operates color coded lights to permit visual verification of heater element actuation.
REFERENCES:
patent: 3744046 (1973-07-01), Tamasi
patent: 4583086 (1986-04-01), Andrews et al.
patent: 4739184 (1988-04-01), Onesti
patent: 4825199 (1989-04-01), Antilozi
Harrod Russell L.
Morley, II Lloyd F.
Cummins Engine Company, Inc.
Raevis Robert
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