Nippon Soken, Inc.

Toyota Jidosha Kogyo Kabushiki Kaisha

Nippondenso Co., Ltd.

Susumu Sato

Tadashi Hattori

Yukihisa Takeuchi

Masahiro Tomita

Eturo Yasuda

Keiji Aoki

Yoshihiro Segawa

Yoshiki Ueno

Takashi Taguchi

Shigeru Takagi

Shigeru Kamiya

Teiichi Nabeta

Minoru Kato

Takehiro Nakamura

In a photo-electric smoke detector device, a first photo-detector receives the light emitted from a light emitter and scattered by smoke, and a second photo-detector directly receives the light emitted from the light emitter. The second photo-detector has an element surface on which trimmed electrodes are arranged. The electrodes of the second detector act to limit the amount of light emitted from the light emitter and transmitted to the elements of the second detector.

Photo-electric smoke detector with light shielding electrode

A heat-blocking glass comprising: a first layer of infrared rays-blocking film of any thickness formed on a substrate; a plurality of intermediate layers from a second to a (2n+2)th layer (n: positive integral) stacked on said first layer, the optical thickness of each intermediate layer being .lambda./4 (.lambda.: design wavelength); and an uppermost (+3)th layer of a .lambda./8 optical thickness. The refractive index of the first layer is smaller than the refractive index of the second layer. The refractive index of each layer from the second layer to the uppermost layer is arranged so that high-refractive-index layers and low-refractive-index layers are alternately stacked, the second layer being disposed as a high-refractive-index layer.

Heat-blocking glass

Heat reflection film

A carbon particulates cleaning device comprises a casing, a filter for catching and collecting carbon particulates included in the exhaust gas within the casing, an oxidizing catalyst carrier which is disposed within the casing and a fuel supply means for supplying the fuel into the interior of the casing. When the volume of the carbon particulates caught and collected by the filter reaches a predetermined volume, the fuel is supplied from the fuel supply means into the interior of the casing and burnt by the oxidization promoting action of the oxidizing catalyst. And the caught and collected carbon particulates are burnt and cleaned due to the burning heat of the fuel.

Carbon particulates cleaning device for diesel engine

A heat rays reflecting film composed of dielectric thin layers (n.sub.H layers) having a relatively high refractive index and dielectric thin layers (n.sub.L layers) having a relatively low refractive index which are alternately piled on one another, is disclosed. The first layer of the heat rays reflecting film, which contacts with the air is n.sub.L layer and the undermost layer which contacts with the window glass is n.sub.H layer. The optical thickness of the first layer is less than .lambda./4 while that of the other layers is .lambda./4. And the thickness of each layer is expressed by the formula: optical thickness/nv wherein nv is the refractive index for visible rays.

Heat rays reflecting film

A carbon particulates cleaning device comprises a carbon particulates catching means, a fuel injecting means, a fuel retaining means for retaining the fuel injected by the fuel injecting means near the carbon particulates catching means, a fuel igniting means for igniting the fuel retained by the fuel retaining means, and a gas blowing means which blows gas for maintaining the fuel burning and applying the heat of the burning fuel into the carbon particulates caught by the carbon particulates catching means. The carbon particulates caught by the carbon particulates catching means are effectively burnt and eliminated by supplying gas which is heated due to the burning heat of the fuel ignited by the fuel igniting means.

A carbon particulates cleaning device for use in a diesel engine of an automobile or the like comprises an exhaust gas main pipe, an exhaust gas branch pipe diverged from the exhaust main pipe, a carbon particulates catching member which is provided within at least one of the exhaust gas main pipe and the exhaust gas branch pipe, a valve means by which exhaust gas is selectively supplied into the exhaust gas main pipe or the exhaust gas branch pipe, a heating means which heats the carbon particulates catching member, a gas supplying means which supplies gas into the carbon particulates catching member when the carbon particulates catching member is heated and a control means which controls each operation of the valve means, the heating means and the gas supplying means. When the carbon particulates caught by the carbon particulates catching member reaches a predetermined volume, a control means operates to stop the exhaust gas from flowing into the carbon particulates catching member, the upper stream portion of the carbon particulates catching member is heated over the burning temperature of carbon particulates by the heating means and gas such as air is supplied from the gas supplying means into the carbon particulates catching member to transmit the heat of the upper stream portion of the carbon particulates catching member into the downstream portion thereof. As a result, the carbon particulates catching member is effectively heated by a small amount of heat energy and the carbon particulates caught by the carbon particulates catching member are burnt and eliminated.

A filter for purifying exhaust gas of an automobile or the like comprises a rigid ceramic supporting member provided with at least one flow passage and porous ceramic filtering material which is charged within the passage and sintered to the walls so as to be integrally connected to the supporting member. This filter shows excellent exhaust gas purifying efficiency as well as high mechanical strength.

Filter for purifying exhaust gas

A device for removing fine carbon particles from exhaust gas emitted by automobile diesel engines or the like thereby to clean the exhaust gas. The device incorporates a filter for collecting fine carbon particles suspended by the exhaust gas. After a predetermined amount of fine carbon particles is accumulated on the filter, the carbon particles are burnt to regenerate the filter. The detection of amount of carbon particles accumulated on the filter is made through the detection of the fuel consumption of the engine or the differential pressure across the filter.

Carbon particles removing device

A gas component detection apparatus comprises a first and a second gas sensing elements each composed of a metal oxide which exhibits variable electric resistances according to gaseous components and temperatures of gases to be detected. A catalyst is carried at least by the first sensing element for promoting oxidation reactions of the gaseous components of the gases. A first pair of electrodes are inserted into those portions of the first sensing element which are subjected to catalytic action of the catalyst. Into the portions of the second sensing element which are not subjected to catalytic action are inserted a second pair of electrodes. The first pair of electrodes sense a variation in electric resistances resulting from the gaseous components and temperatures of the gases, while the second pair of electrodes detect an electric resistance variation related mainly upon the gas temperatures. Consequently, an output signal reflecting substantially only the gaseous components of the gases is produced by offsetting both of the electric resistances separately sensed utilizing a suitable electric circuit.

Gas component detection apparatus

A gas component detection apparatus for detecting gaseous components of exhaust gases from a combustion device. There is provided a gas component detecting element composed of semiconductive metal oxides and having its outer surface partly exposed to the exhaust gases. A catalyst layer is carried on the larger part of the latter outer surface of the detecting element. A pair of electrodes are provided for sensing the electric resistance exhibited at the portion of the detecting element which carries the catalyst layer. Also another electrode is provided for cooperating with one of the above pair of electrodes to detect the electric resistance exhibited at the portion of the detecting element which does not carry the catalyst layer. The former portion of the detecting element exhibits variable electric resistances resulting from concentrations of the gaseous components and the temperatures of the exhaust gases, while the latter portion thereof exhibits variable electric resistances related mainly upon the temperatures of the exhaust gases. Consequently, an output signal reflecting substantially only the gaseous components of the exhaust gases is produced by offsetting both of the electric resistances separately sensed utilizing a suitable electric circuit.

A gas component detection apparatus for detecting gas components contained in an exhaust gas from a combustion device and determining an air-fuel ratio of an air-fuel mixture supplied thereto. A gas component detecting element composed of a semiconductive metal oxide is contacted by the exhaust gas andexhibits variable electric resistances according to the concentrations of the gas components. The electric resistance is taken out as an electric signal through two electrodes disposed either on the surface of the detecting element exposed to the exhaust gas or within the detecting element adjacent that exposed surface. A porous coating layer having an exhaust gas permeability covers the surface of the detecting element exposed to the exhaust gas so as to prevent poisonous substances contained in the exhaust gas from depositing on that exposed surface of the detecting element. The coating layer is formed of a metal oxide having electrically insulating properties and carries therein a catalyst promoting an oxidation reaction of the exhaust gas. The detecting element exhibits an abruptly changed electric resistance when the actual air-fuel ratio of the air-fuel mixture supplied into the combustion device is deviated from a stoichiometrical air-fuel ratio, thereby enabling the control of the air-fuel ratio of the air-fuel mixture.

Growing community of inventors

Okazaki, Japan

Susumu Sato