Torque measurement circuit and method

Details Torque measurement circuit and method Torque measurement circuit and method

G - Physics

01

L

354/28

G01L 3/00 (2006.01) G01M 15/00 (2006.01) G01M 15/04 (2006.01) F02B 75/02 (2006.01)

Patent

CA 1225154

IMPROVED TORQUE MEASUREMENT CIRCUIT AND METHOD ABSTRACT: An improved torque measurement circuit and method for an internal combustion engine of the four cylinder, four-cycle type includes synchronous detection circuits and circuits to account for inertia forces due to the mass of the pistons and connecting rods. The synchro- nous detection circuits (44,46) multiply a signal directly proportional to torque variations with sine wave (26) and cosine wave (36) signals to produce a synchronous detection signal. summing circuit (52) is provided to combine the synchronous detection signal with a signal (V.omega.2) 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.

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