Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1990-10-01
1991-09-03
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel injection system
73116, 123613, F02P 7073
Patent
active
050443364
ABSTRACT:
An improved cylinder recognition apparatus and method 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 specific cylinder. In one aspect, cylinder recognition is not performed or stopped in a specific engine operating range such as in an early stage of an engine starting period in which the rotation of the engine is liable to abruptly and greatly vary and an error in the recognition of the cylinder could result, so as to avoid any resultant damage to the engine. In another aspect, it is determined whether the result of the cylinder recognition is correct or incorrect, and if correct, the engine is controlled based on the result of the cylinder recognition, but if incorrect, the engine is controlled based on other engine operating parameters to avoid improper engine control resulting from incorrect cylinder recognition.
REFERENCES:
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patent: 4700305 (1987-10-01), Lotterbach et al.
patent: 4932388 (1990-06-01), Chiba et al.
patent: 4959996 (1990-10-01), Akasu
patent: 4989448 (1991-02-01), Fukui et al.
Argenbright Tony M.
Mitsubishi Denki & Kabushiki Kaisha
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