Internal combustion engine exhaust gas monitoring system

Details Internal combustion engine exhaust gas monitoring system Internal combustion engine exhaust gas monitoring system

1978-02-28

1980-03-25

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123 32EE, F02B 7510

Patent

active

041944712

ABSTRACT:
To detect substantial deviation of operation of the engine with fuel-air mixtures from stoichiometric relationships, particularly extended operation under very lean or enriched supply mixtures, the exhaust gases are conducted past a first sensor which provides a clearly defined voltage jump upon change of the exhaust gases between reducing and oxidizing state; and, additionally, to a second exhaust gas sensor and preferably to a third sensor, the second and third sensors being, respectively, responsive to the oxygen level in the exhaust gases and to the CO (or hydrocarbon) level in the exhaust gases, respectively, and additionally modifying the relative proportion of fuel and air of the mixture being fed to the engine.

REFERENCES:
patent: 3745768 (1973-07-01), Zechnall et al.
patent: 3759232 (1973-09-01), Wahl et al.
patent: 3782347 (1974-01-01), Schmidt et al.
patent: 3841987 (1974-10-01), Friese et al.
patent: 3926154 (1975-12-01), Williams
patent: 4117815 (1978-10-01), Ikevra
patent: 4127088 (1978-11-01), Ezoe

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