| 摘要 |
<p>IMPROVED TORQUE MEASUREMENT CIRCUIT AND METHOD 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 synchronous 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.</p> |
