Chemistry: electrical and wave energy – Processes and products – Vacuum arc discharge coating
Patent
1977-01-04
1978-11-28
Tung, T.
Chemistry: electrical and wave energy
Processes and products
Vacuum arc discharge coating
G01N 2746
Patent
active
041274644
ABSTRACT:
A sensor is provided for electrochemically detecting the oxygen concentration of exhaust gas from an internal combustion engine of a vehicle. The sensor has an oxygen ion-transferrable solid electrolyte partition wall having catalyst electrodes on both sides in its housing, to thereby separate the housing into a reference gas contact compartment and an exhaust gas contact compartment in a hermetically isolated state between the two compartments. The reference gas contact compartment is sealed off from the surrounding atmosphere, but communicates with the atmosphere at a desired location in the vehicle only through an extended passage for introducing air as the reference gas into the reference gas contact compartment. The solid electrolyte partition wall is protected from splashing of water droplets, and consequently from quenching, ensuring an increased durability or life of the sensor without damage.
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patent: 3619381 (1971-11-01), Fitterer
patent: 3791954 (1974-02-01), Noda et al.
patent: 3841987 (1974-10-01), Friese et al.
patent: 3844920 (1974-10-01), Burgett et al.
patent: 3960693 (1976-06-01), Weyl et al.
patent: 4007106 (1977-02-01), Hone et al.
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Ichikawa Norio
Ueno Sadayasu
Hitachi , Ltd.
Tung T.
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