| 摘要 |
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. |
