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US 6,668,633 B2Granted
Electronic fuel injector tester
AssigneeHickok Incorporated
InventorsGeorge R. Hart, Robert L. Bauman
Life of this patent
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AssigneeHickok Incorporated
InventorsGeorge R. Hart, Robert L. Bauman
Estimating the term…
An electronic fuel injector tester which permits fuel injectors to be tested when a car is at idle is disclosed. The fuel injector tester is in the form of a probe and detects the impact or vibration which occurs when the pintle within a fuel injector opens by using a piezoelectric transducer provided in the pistol-type handle of the tester. A light emitting diode provided in the pistol-type handle flashes each time the pintle within the fuel injector opens and the piezoelectric transducer emits an audible sound each time the pintle within the fuel injector opens. The fuel injector tester remains in the “sleep” mode when not in use and is activated by tapping the tester on a hard surface. When testing has been completed, the fuel injector tester automatically goes back into the “sleep” mode.
A fuel injector testing device comprising a handle portion, a probe portion attached to said handle portion, said probe portion being placeable on the fuel injector to be tested to detect vibrations within the fuel injector, a piezoelectric transducer receivable within said handle portion and connected to said probe portion, said piezoelectric transducer being operable to convert said vibrations detected by said probe portion into an output voltage, a reference voltage, means for comparing said output voltage with said reference voltage, said voltage comparing means producing an output signal when said output voltage exceeds said reference voltage, and a source of power for said testing device;
Dependencies are inferred from the claim text.