| 摘要 |
PCT No. PCT/EP89/01138 Sec. 371 Date May 23, 1991 Sec. 102(e) Date May 23, 1991 PCT Filed Sep. 28, 1989 PCT Pub. No. WO91/05154 PCT Pub. Date Apr. 18, 1991.A ratiometric signal correction system for use in detecting angular position of a butterfly valve in an internal combustion engine in a motor vehicle which is input from one sensor to a master control unit and slave control units. The master control unit serves as reference, and mark pulse signals are transmitted to the or each slave control unit when the butterfly valve is in either of two predetermined angular positions whereupon discrepancies between the angular positions detected by each slave control unit and the master control unit are used to generate correcting factors etc. so that the position of the butterfly valve can be detected with substantially equal accuracy in all control units.
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