Apparatus for measuring engine torque

Details Apparatus for measuring engine torque Apparatus for measuring engine torque

1979-06-25

1981-02-10

Myracle, Jerry W.

Measuring and testing

Brake testing

Single wheel rotating and resistance measuring means

G01L 300

Patent

active

042494168

ABSTRACT:
A measure of engine torque can be obtained by measuring the difference between crankshaft oscillations at the front and rear end of the engine. Angle encoders producing phase outputs attached to the front and rear ends of the crankshaft have their outputs sampled by a phase locked loop to produce instantaneous velocity signals for each unit of crankshaft and a phase comparator connected to both encoder outputs produces a signal proportional to shaft twist. The velocity signals are each differentiated to produce acceleration signals and a calculation circuit scales and combines various signals according to the equation T=A.theta..sub.1 -B.theta..sub.2 +C.theta..sub.1 -E.theta..sub.2 +F(.theta..sub.1 -.theta..sub.2) where T is the engine torque and A, B, C, E and F are constants.

REFERENCES:
patent: 3683684 (1972-08-01), Judlowe
patent: 3897766 (1975-08-01), Pratt, Jr. et al.
patent: 4008600 (1977-02-01), Bremer, Jr. et al.
patent: 4122709 (1978-10-01), Brown et al.

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