Measuring and testing – Simulating operating condition – Marine
Patent
1983-09-26
1985-04-09
Myracle, Jerry W.
Measuring and testing
Simulating operating condition
Marine
G01M 1500
Patent
active
045093636
ABSTRACT:
A system for diagnosing a device such as a fuel pump of an internal combustion engine mounted on a vehicle. The system is provided with an engine operating condition detecting device, for example, engine speed detecting circuit for producing an output, a converter for converting the output to a control voltage, and a driver responsive to the control voltage for driving the device. In normal driving condition of the vehicle, the control voltage form the converter is fed to the driver passing through a first gate. The system further comprises a force-driving system for forcibly driving the device. The force-driving system comprises a manual operated terminal for applying a voltage, an oscillator for producing pulses, and a second gate responsive to the voltage from the terminal for controlling the pulses. The first gate is applied with the pulses and operates to pass the pulses in response to the level of the control voltage, whereby the device is driven by the pulses at a high frequency.
REFERENCES:
patent: 3938075 (1976-02-01), Reddy
patent: 4094191 (1978-06-01), Goetsch et al.
patent: 4219798 (1980-08-01), Frister
patent: 4244340 (1981-01-01), Herth et al.
patent: 4246566 (1981-01-01), Endo et al.
Farber Martin A.
Fuji Jukogyo Kabushiki Kaisha
Myracle Jerry W.
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