Full throttle, specific speed tests in internal combustion engin

Details Full throttle, specific speed tests in internal combustion engin Full throttle, specific speed tests in internal combustion engin

1976-05-07

1977-12-06

Gill, James J.

Measuring and testing

Test stand

For engine

G01L 300

Patent

active

040610268

ABSTRACT:
Diagnosing an internal combustion engine includes full throttle, specific speed tests such as measuring fuel pressure at two checkpoint speeds and at rated speed, and determining the pressure and speed where the governor reduces fuel pressure, an aneroid checkpoint of fuel pressure as a function of engine speed, and a fuel inlet restriction test, all without a dynomometer. The tests are performed with the throttle wide open, so that pressure can be measured downstream of the throttle at accessible taps, and/or to provide maximum fuel-flow test conditions. The speed comparisons are made during an acceleration with the throttle fully open, the instantaneous speed of which is accurately determined by flywheel tooth sensing. The speeds at which the specification pressure is to be checked is determined by comparing indications related to specification speeds expressed in terms of elapsed time between teeth of the flywheel, for a flywheel having the total number of teeth of the engine under test, rather than requiring full comparisons with actual speed expressed in terms of revolutions per minute.

REFERENCES:
patent: 2499494 (1950-03-01), Greer
patent: 2612777 (1952-10-01), Greer
patent: 3937087 (1976-02-01), Heggie
patent: 3955135 (1976-05-01), Fastaia
patent: 3964301 (1976-06-01), Hanson et al.

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