Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
AIR-FUEL RATIO DETECTOR
Document Type and Number:
Japanese Patent JPS6024445
Kind Code:
A
Abstract:

PURPOSE: To detect an air-fuel ratio from a rich region to a lean region by one detector, by increasing the oxygen content of gas to be inspected by using an oxygen pump while measuring the increased oxygen content by a lean sensor.

CONSTITUTION: An air-fuel ratio detector contains a ceramic cylinder 1, a gas diffusion orifice 2, a disc shaped solid electrolyte and electrodes 4a, 4b, 5a, 5b and connected to a DC power source 7 through the electrodes 4a, 5a and a lead wire 6a to constitute an oxygen pump while connected to a DC constant voltage power source 8 and a current measuring apparatus 9 through the electrodes 4b, 5b and a lead wire 6b to constitute a lean sensor. Because a constant amount of oxygen flows from the electrode 5a in the open air side to the electrode 4a to be always flowed into gas to be inspected introduced into the detector from the diffusion orifice 2, the gas to be inspected is brought to a lean state. Because the gas to be inspected comes to a lean state even if said gas is a rich state, the air-fuel ratio of the gas in the space between the diffusion orifice 2 and the solid electrolyte 3 is detected by the lean sensor, that is, by one detector.


Inventors:
SAKURAI SHIGENORI
KAMO TAKASHI
IGAI TADAYOSHI
Application Number:
JP1983000132476
Publication Date:
February 07, 1985
Filing Date:
July 20, 1983
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TOYOTA MOTOR CO LTD
International Classes:
G01N27/41; F02D35/00; F02D41/14; G01M15/00; G01N27/409; G01N27/416; G01N27/417; (IPC1-7): G01N27/46; G01N27/58