Cylinder identifying device for an internal combustion engine

Details Cylinder identifying device for an internal combustion engine Cylinder identifying device for an internal combustion engine

1995-02-21

1996-09-10

Chilcot, Richard

Measuring and testing

Vehicle chassis

Steering

G01M 1500

Patent

active

055548024

ABSTRACT:
A cylinder identifying apparatus for an internal combustion engine including a rotary signal generator, a measuring device, a calculating device and an identifying device. The rotary signal generator generates, in synchronism with a rotation of the engine, a signal having first positional pulses, each corresponding to one of a plurality of cylinders of the engine, and a second positional pulse corresponding to a specific one of the cylinders. The measuring device measures the time periods between the beginning of each contiguous pulse, as well as the time periods representing the width of each of the pulses. The calculating device then calculates ratios of each of the time periods representing the widths of the pulses to their corresponding time period of the time periods representing the time between the beginning of each contiguous pulse. These ratios are then normalized. The identifying device then identifies one of the cylinders by comparing the normalized values to a reference value, and then is able to identify the other cylinders because the sequence of the cylinders is known.

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