Method of determining air density for intake air of automobile e

Details Method of determining air density for intake air of automobile e Method of determining air density for intake air of automobile e

1994-09-06

1996-02-13

Chilcot, Richard

Measuring and testing

Simulating operating condition

Marine

731173, G01M 1500

Patent

active

054904170

ABSTRACT:
A method for determining the air density of intake air into an engine without using an additional hard ware like an atmospheric pressure sensor, An average basic fuel injection amount and an average throttle opening angle are obtained when the engine is in a first predetermined condition and when it is in a second predetermined condition, respectively. Based on these average basic fuel injection amonut data and average throttle opening angle data, a determination parameter is calculated, The determination parameter thus calculated is employed for a parameter from which an air density value is obtained or for a parameter from which it is judged whether the engine is operated in high altitude or not.

REFERENCES:
patent: 5191789 (1993-03-01), Furuya
patent: 5293553 (1994-03-01), Dudek et al.
patent: 5339681 (1994-08-01), Sekozawa et al.

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