Air-fuel ratio detector and method of measuring air-fuel ratio

Details Air-fuel ratio detector and method of measuring air-fuel ratio Air-fuel ratio detector and method of measuring air-fuel ratio

1984-02-03

1986-03-11

Myracle, Jerry W.

Measuring and testing

Test stand

For engine

73 23, 204412, 204426, G01M 1500

Patent

active

045746273

ABSTRACT:
An air-fuel ratio detector and an air-fuel ratio measuring method for detecting an oxygen density in an exhaust gas emitted from the internal combustion engine of an automobile. The air-fuel ratio detector has a tubular body and a pair of partition members dividing the tubular body into a closed-end section and an open-end section. At least one of the partition members comprises a solid electrolyte permeable to oxygen ions. A pair of electrodes is mounted on opposite surfaces of the solid electrolyte and connected to a DC power supply, thus constituting an oxygen pump. Another pair of electrodes is mounted on one of the partition members and connected to a DC power supply, thus constituting a limited-current oxygen sensor. Oxygen is introduced into a space between the partition members at all times by the oxygen pump to maintain the gas, which has been supplied through a gas dispersion member into the space, lean.

REFERENCES:
patent: 4264425 (1981-04-01), Kimura et al.
patent: 4498968 (1985-02-01), Yamada et al.

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