Measuring and testing – Test stand – For engine
Patent
1974-10-21
1976-06-22
Ruehl, Charles A.
Measuring and testing
Test stand
For engine
G01M 1500
Patent
active
039643018
ABSTRACT:
Apparatus for and method of determining the brake torque and horsepower of an internal combustion engine without connecting an external load. Means are provided to operate the engine at full throttle and with all but one out of n of successive ignitions inhibited, the value n being selected so that the engine operates with just enough power to equal the frictional load of the engine and maintain an equilibrium speed at the upper end of the engine speed range. The engine is then operated momentarily with full ignition, and then with no ignition, during which a determination is made of the rate at which the engine decelerates through the equilibrium speed. The deceleration rate is multiplied by the known inertia of the engine to determine the friction torque of the engine at the equilibrium speed. The friction torque is multiplied by n - 1 to predict the brake torque of the engine at the equilibrium speed when operated normally with external load. Horsepower is determined by multiplying torque and speed.
REFERENCES:
patent: 3657922 (1972-04-01), Sibeud
patent: 3757570 (1973-09-01), Cowley et al.
patent: 3757571 (1973-09-01), Chamberas
patent: 3817092 (1974-06-01), Ludloff
patent: 3839907 (1974-10-01), Hanson et al.
Hanson Richard Eric
Nolan, Jr. Thomas Edward
Norton Edward J.
Olson Carl V.
RCA Corporation
Ruehl Charles A.
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