Detection process and device for an electronic injection system of a multicylinder engine
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United States of America Patent
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-
Feb 4, 1992
Grant Date -
N/A
app pub date -
Aug 3, 1990
filing date -
Aug 3, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A detection device, for an injection pump of a motor vehicle engine, for measuring the speed of rotation of the engine, pinpointing angularly the top dead center corresponding to each cylinder of the engine and performing static timing of the injection pump. The device includes a multipolar ring of alternate polarity mounted on the rotation shaft of the pump inside the latter, the poles being grouped in a number of identical sectors corresponding to the number of cylinders of the engine; a sensor sensitive to magnetic field, mounted inside the pump opposite the ring; and an electronic processing interface connected, on the other hand, to the sensor, and on the other hand, to a computer for control of the electronic injection. The multipolar ring produces a varying magnetic field which is sensed by the sensor, and waveshaped and converted into a digital signal for application to a computer for control of electronic injection.
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