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A brake stroke sensor and an steering sensor are individually and collectively provided. A brake stroke sensor includes a force-receiving plate, a second plate movable relative to the force-receiving plate, a spring disposed between the plates and operatively connected to the pushrod, a strain gauge

A brake stroke sensor and an steering sensor are individually and collectively provided. A brake stroke sensor includes a force-receiving plate, a second plate movable relative to the force-receiving plate, a spring disposed between the plates and operatively connected to the pushrod, a strain gauge bridge mounted on the force-receiving plate and a microcontroller capable of converting the strain gauge bridge signal into digital data. A steering sensor includes a mechanical interface operatively connected to a nonmoving member and a moving member, an encoder capable of transforming the rotational motion of the mechanical interface into an electrical signal, and a microcontroller capable of calculating, from the electrical signal, a count indicative of the relative positions of the members. A combined brake stroke and steering sensor may include individual and common elements of both the brake stroke and steering sensors described above. The brake stroke, steering sensor and combined brake stroke and steering sensor may utilize a modem for transmitting data to a system controller over an electrical bus.

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A brake stroke sensor and an steering sensor are individually and collectively provided. A brake stroke sensor includes a force-receiving plate, a second plate movable relative to the force-receiving plate, a spring disposed between the plates and operatively connected to the pushrod, a strain gauge

A brake stroke sensor and an steering sensor are individually and collectively provided. A brake stroke sensor includes a force-receiving plate, a second plate movable relative to the force-receiving plate, a spring disposed between the plates and operatively connected to the pushrod, a strain gauge bridge mounted on the force-receiving plate and a microcontroller capable of converting the strain gauge bridge signal into digital data. A steering sensor includes a mechanical interface operatively connected to a nonmoving member and a moving member, an encoder capable of transforming the rotational motion of the mechanical interface into an electrical signal, and a microcontroller capable of calculating, from the electrical signal, a count indicative of the relative positions of the members. A combined brake stroke and steering sensor may include individual and common elements of both the brake stroke and steering sensors described above. The brake stroke, steering sensor and combined brake stroke and steering sensor may utilize a modem for transmitting data to a system controller over an electrical bus. ansion stroke when a difference in time given by said non-formed region currently passing near the detector means is less than a difference in time given by said non-formed region previously passing near the detector means. 3. The stroke discriminator of an internal combustion engine according to claim 1, wherein said discriminator means include expansion stroke discriminator means for calculating a first difference in time between a time at which a first detectable element of two or more detectable elements passing near the detector means and a time at which the second detectable element of said two or more detected elements passes the detector means when said piston approaches from said bottom dead center position to said top dead center position; for calculating a second difference in time between a time at which any one of two neighboring detectable elements, sandwiching said non-formed region, passes near the detector means after said first detectable element and said second detectable element have passed the detector means and a time at which the detectable element adjacent to said one detectable element at said equal angle interval passes near the detector means, and, for determining that the stroke of said internal combustion engine is an expansion stroke when a ratio of said second difference in time to said first difference in time is greater than a predetermined value.