Torque measurement circuit and method

Details Torque measurement circuit and method Torque measurement circuit and method

1984-05-11

1985-11-05

Myracle, Jerry W.

Measuring and testing

Test stand

For engine

7386219, G01M 1500

Patent

active

045505950

ABSTRACT:
An improved torque measurement circuit and method for an internal combustion engine of the four cylinder, two-cycle type includes synchronous detection circuits and circuits to account for inertia forces due to the mass of the pistons and connecting rods. The synchronous detection circuits multiply a signal directly proportional to torque variations with sine wave and cosine wave signals to produce a synchronous detection signal. A summing circuit is provided to combine the synchronous detection signal with a signal proportional to the square of the angular velocity of the crankshaft of the engine to produce a resultant output signal directly proportional to average torque and independent of speed.

REFERENCES:
patent: 3693426 (1972-09-01), Little
patent: 3729989 (1973-05-01), Little
patent: 3817092 (1974-06-01), Ludloff
patent: 3921446 (1975-11-01), Ludloff
patent: 4098242 (1978-07-01), Anderson
patent: 4301678 (1981-11-01), Full et al.
patent: 4344140 (1982-08-01), Leung
SAE Technical Paper Series 810155 entitled "A Non-Contacting Torque Sensor for the Internal Combustion Engine" by W. B. Ribbens, Date: Feb. 1981--Pertinent pp.: 59 through 67.

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