Method and apparatus for measuring engine mass air flow

Details Method and apparatus for measuring engine mass air flow Method and apparatus for measuring engine mass air flow

1988-01-25

1989-08-22

Lall, Parshotam S.

Boots, shoes, and leggings

731182, 123478, 36443105, 364510, G06F 1520

Patent

active

048602221

ABSTRACT:
A microprocessor based fuel control for automotive vehicle engines samples the measured air flow rate at fixed intervals and calculates the air mass flow for a cylinder interval which varies with engine speed. A sensor on the engine detects cylinder position for the cylinder interval determination. An independent clock controls the air flow rate sampling periods. During each cylinder interval the air flow rate is integrated for each whole sampling period and is approximated for each partial period at the boundaries of the cylinder interval. The results are summed to obtain the mass air flow for the cylinder interval.

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patent: 4589279 (1986-05-01), Mitsuyasu et al.
patent: 4630206 (1986-12-01), Amamo et al.
patent: 4640253 (1987-02-01), Kamai
patent: 4658640 (1987-04-01), Kido et al.
patent: 4736302 (1988-04-01), Kinugawa et al.

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