Method and apparatus for estimating an atmospheric pressure base

Details Method and apparatus for estimating an atmospheric pressure base Method and apparatus for estimating an atmospheric pressure base

1987-05-18

1989-03-21

Gruber, Felix D.

Boots, shoes, and leggings

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

Patent

active

048149977

ABSTRACT:
A system for correcting for atmospheric pressure without using an atmospheric pressure sensor. A single pressure sensor measures air pressure in the intake manifold of a fuel injected engine. A control unit controls the fuel amount and injection timing in accordance with various engine parameters. The intake pressure at a predetermined time is estimated as being indicative of atmospheric pressure. This intake pressure may be further corrected to provide a better estimate. When the engine operates at a low speed and high load, this pressure data is also indicative of atmospheric pressure. The amount of fuel to be injected and the ignition timing can be controlled using this updated atmospheric data. This provides better operation of the system.

REFERENCES:
patent: 4157699 (1979-06-01), Mori
patent: 4271797 (1981-06-01), McCarbery
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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