Cylinder recognition apparatus for an internal combustion engine

Details Cylinder recognition apparatus for an internal combustion engine Cylinder recognition apparatus for an internal combustion engine

1990-09-20

1991-10-01

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123613, 123643, F02P 706

Patent

active

050523589

ABSTRACT:
A cylinder recognition apparatus for a multi-cylinder internal combustion engine capable of recognizing a specific reference cylinder as well as the remaining cylinders of the engine by use of only a single signal. A signal generator generates a single output signal in synchrony with the rotation of the engine, the output signal including a plurality of positional pulses each representative of prescribed rotational positions of a corresponding cylinder, and a cylinder recognition pulse at a location near a specific one of the positional pulses corresponding to a specific cylinder. A microcomputer discriminates the cylinder recognition pulse among the signal generator output pulses so as to recognize the specific positional pulse corresponding to the speicfic cylinder. The microcomputer calculates the pulse width of each pulse in the signal generator output signal and the pulse interval between the rising or falling edges of successive pulses, calculates the ratio of the pulse width to the pulse interval for each pulse, and discriminates the cylinder recognition pulse based on the ratio thus obtained.

REFERENCES:
patent: 4483293 (1984-11-01), Akasu
patent: 4519362 (1985-05-01), Arakawa et al.
patent: 4932388 (1990-06-01), Chiba et al.

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