Denso Corporation

Nippondenso Co., Ltd.

Trinity Industrial Corporation

Katsuhiro Ishikawa

Hiromi Sano

Naoto Miwa

Toshitaka Saito

Akio Tanaka

Naohiro Osawa

Shohei Udo

This invention provides a valve-module that is operative with relatively low-pressure pilot-air despite its small size and has excellent durability with less performance-variations than among other similar products. The valve-module of the present invention includes a pilot-port and a biasing-means for biasing the piston-portion in the opposite direction, and controls the opening and closing of the valve by supplying and discharging pilot-air. The first-permanent magnet is held by the first magnet-holder of the valve-rod, and the second-permanent magnet is held by the second magnet-holder of the piston housing. A magnetic-attraction force acts between both permanent magnets and drives the piston in the first direction and increases with the mutual approach of both magnets. Due to the presence of the thin-walled first-and-second collision-avoidance portions, an arrangement-relationship is set between the two permanent magnets such that the end-faces do not directly collide with each other, even when they are closest to each other.

Valve module, valve device, valve system

An air-fuel ratio sensing element comprises a cup-shaped solid electrolyte with one end opened and the other end closed, an external electrode provided on an outer wall surface of the solid electrolyte so as to be exposed to measured gas, and an internal electrode provided on an inner wall surface of the solid electrolyte in a confronting relationship to the external electrode. A first insulating layer, made of a gas-permeable and nonconductive porous material, is provided on the external electrode at least in a region used for detecting of an air-fuel ratio. A second insulating layer is provided outside the first insulating layer and, a heater layer as provided between the first insulating layer and the second insulating layer.

Air-fuel ratio sensor

Oxygen sensor

Growing community of inventors

Aichi, Japan

Katsuhiro Ishikawa