Method and apparatus for controlling internal combustion engine

Details Method and apparatus for controlling internal combustion engine Method and apparatus for controlling internal combustion engine

1982-09-29

1986-05-20

Gruber, Felix D.

Boots, shoes, and leggings

36443110, 364558, 123412, 123416, 123488, F02D 3500, F02D 4126, F02P 515

Patent

active

045905630

ABSTRACT:
A single pressure sensor is provided to measure the air pressure in the intake manifold of a fuel injection engine. An electronic control unit having a microcomputer is provided to control the fuel amount and ignition timing in accordance with various engine parameters including the engine rotational speed and the intake pressure. The intake pressure is first measured before the engine is started so that the data of this pressure can be used as data indicative of atmospheric pressure. During operation of the engine, the pressure data may be used as normal intake pressure data. However, when the engine operates at a low speed and under high load, the pressure data is used as data indicative of the atmospheric pressure with slight correction. The amount of fuel to be injected and ignition timing thus controlled with updated data of atmospheric pressure, and therefore, undesirable phenomena, which are apt to occur when an engine is operated at a high altitude place, are effectively prevented, resulting in desired air/fuel ratio and ignition timing.

REFERENCES:
patent: 4157699 (1979-06-01), Mori
patent: 4192279 (1980-03-01), Maisch et al.
patent: 4271797 (1981-06-01), McCarbery
patent: 4286683 (1981-09-01), Zeigner et al.
patent: 4307691 (1981-12-01), Nagae et al.
patent: 4372274 (1983-02-01), Takase
patent: 4385606 (1983-05-01), Hattori et al.
patent: 4416234 (1983-11-01), Ikeura
patent: 4442812 (1984-04-01), Mizuno et al.

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