Dynamic engine power assessment

Details Dynamic engine power assessment Dynamic engine power assessment

1983-03-10

1985-02-26

Caldwell, Sr., John W.

Measuring and testing

Test stand

For engine

G01M 1500

Patent

active

045011389

ABSTRACT:
A dynamic engine power test method comprises operating the engine at a low speed, accelerating the engine at full throttle to a predetermined high speed, such as high idle, without absorbing or dissipating power therefrom, measuring the engine speed and elapsed time to determine the angular acceleration at specific speeds in the operating range of the engine or during one or more relatively small discrete speed intervals or windows preferably corresponding to peak torque speed, an intermediate point, rated speed, and a speed between rated speed and high idle. The torque output of the engine may be calculated manually or preferably automatically for each speed interval based on the equation T=I.alpha. wherein .alpha. is the angular acceleration at that speed and the horsepower for a nominal speed in the interval may also be calculated based on the torque.

REFERENCES:
patent: 3581561 (1971-06-01), Tomashek et al.
patent: 3592053 (1971-07-01), Lucia
patent: 3817092 (1974-06-01), Ludloff
patent: 3938377 (1976-02-01), Converse
patent: 3942365 (1976-03-01), Hanson et al.
patent: 3994160 (1976-11-01), Hanson
patent: 4292670 (1981-09-01), Reid et al.

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