초록 ▼

An engine roughness sensor for generating speed normalized digital roughness signals indicative of the variations in magnitude between successive torque impulses imparted to the engine\s crankshaft by measuring the period or time it takes the crankshaft to rotate through the same angle for each torq

An engine roughness sensor for generating speed normalized digital roughness signals indicative of the variations in magnitude between successive torque impulses imparted to the engine\s crankshaft by measuring the period or time it takes the crankshaft to rotate through the same angle for each torque impulse is disclosed herein. The digital roughness signal is normalized as a function of engine speed by dividing the measured magnitude of each torque impulse by a signal indicative of the engine speed to reduce the magnitude of operator induced variations in the generated roughness signals. The disclosed engine roughness sensor generates a second difference roughness signal which is the difference between the sequentially generated roughness signals.

대표청구항 ▼

A roughness sensor for generating roughness signals indicative of the variation in the magnitude of the torque impulses imparted to a rotating element, the sensor comprising: means detecting the rotational position of the rotating element for generating first interval signals indicative of a first a

A roughness sensor for generating roughness signals indicative of the variation in the magnitude of the torque impulses imparted to a rotating element, the sensor comprising: means detecting the rotational position of the rotating element for generating first interval signals indicative of a first angular interval of the rotating element\s rotation for each torque impulse, and for generating second interval signals indicative of a subsequent angular interval of the rotating element\s rotation, wherein the rotating member has a maximum rotational velocity in response to each torque impulse in said subsequent angular interval; means response to said first and second interval signals for generating a normalized signal having a value proportional to the magnitude of the torque impulse determined by the time required by the rotating element to rotate through said subsequent angular interval and inversely proportional to engine speed determined by the time required for the rotating element to rotate through said first angular interval; means for generating a roughness signal from at least two sequentially generated normalized signals, said roughness signal having a value equal to the difference between said sequentially generated normalized signals; and means responsive to more than one roughness signal for generating an average roughness signal having a value indicative of the average of at least two previously generated said roughness signals.