Exhaust gas recirculation diagnostic

Details Exhaust gas recirculation diagnostic Exhaust gas recirculation diagnostic

1994-06-24

1996-04-16

Teska, Kevin J.

Boots, shoes, and leggings

123571, F02D 4300, F02M 2506

Patent

active

055089267

ABSTRACT:
Restrictions in a path of flow of recirculated internal combustion engine exhaust gas from an engine exhaust system to an engine intake manifold are diagnosed when the engine is determined to be in a steady state operating condition through a monitoring of the air pressure in the engine intake manifold while the flow of exhaust gas thereto is varied according to a predetermined flow schedule. Changes in the monitored air pressure are determined over a test period, are filtered through a lag filter process having a dynamic filter coefficient, and are compared to a dynamic threshold to determine a presence of a restriction. The filter coefficient and the threshold may be adjusted in accord with the outcome of the diagnostic.

REFERENCES:
patent: 3977373 (1976-08-01), Sand
patent: 4114575 (1978-09-01), Nohira et al.
patent: 4114576 (1978-09-01), Goto et al.
patent: 4125100 (1978-11-01), Assenheimer et al.
patent: 4165650 (1979-08-01), Weissler, II
patent: 4173205 (1979-11-01), Toelle
patent: 4269156 (1981-05-01), Drellishak
patent: 4373497 (1983-02-01), Hamren
patent: 4383441 (1983-05-01), Willis et al.
patent: 4473056 (1984-09-01), Ishida et al.
patent: 4513713 (1985-04-01), Koumura et al.
patent: 4671107 (1987-06-01), Chiesa et al.
patent: 4719893 (1988-01-01), Buslepp et al.
patent: 5014203 (1991-05-01), Miyazaki et al.
patent: 5257610 (1993-11-01), Ohuchi
patent: 5341300 (1994-08-01), Fujimoto

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