Abstract: A gas sensor includes a gas sensor element for detecting a specific gas concentration in measured gas. The gas sensor element includes a solid electrolyte, a measured gas side electrode into which measured gas is introduced through a porous diffusion resistance layer, a reference gas side electrode facing a reference gas chamber, and a diffusion space portion between the porous diffusion resistance layer and the measured gas side electrode. The porous diffusion resistance layer has a measured gas inlet opened to an element outer surface and a measured gas outlet opened to the diffusion space portion. A relationship between a distance between the inlet and the outlet and a distance between the outlet and the measured gas side electrode is expressed by 0<L1/(L1+L2)<0.4.

Abstract: An abnormality detection device for an air-fuel ratio detection device arranged downstream of a filter is equipped with an abnormality detection unit that detects an abnormality in the air-fuel ratio detection device based on output change characteristics of the air-fuel ratio detection device during fuel cutoff control for stopping the supply of fuel to a combustion chamber of an internal combustion engine, and a combustion determination unit that determines whether or not a combustion amount of particulate matter in a filter during fuel cutoff control is larger than a predetermined amount. The abnormality detection unit prohibits detection of an abnormality in the air-fuel ratio detection device when the combustion determination unit determines that the combustion amount is larger than the predetermined amount.

Abstract: The abnormality diagnosis system 1 of a downstream side air-fuel ratio detection device 41, 42, comprises an air-fuel ratio control part 71 controlling an air-fuel ratio of an air-fuel mixture, an abnormality judgment part 72 judging abnormality of the downstream side air-fuel ratio detection device based on a characteristic of change of output of the downstream side air-fuel ratio detection device when the air-fuel ratio control part makes the air-fuel ratio of the air-fuel mixture change, and an oxygen change calculation part 73 calculating an amount of change of an oxygen storage amount of the catalyst when the air-fuel ratio control part makes the air-fuel ratio of the air-fuel mixture change. The abnormality judgment part does not judge abnormality of the downstream side air-fuel ratio detection device when the amount of change of the oxygen storage amount is less than a lower limit threshold value.

Abstract: A control device for an exhaust sensor is configured to control the exhaust sensor disposed in an exhaust passage of an internal combustion engine. The control device for an exhaust sensor includes: a sensor element; a heater configured to heat the sensor element; a current detection circuit configured to detect an output current of the exhaust sensor, and an electronic control device configured to control electric power that is supplied to the heater by PWM control.

Abstract: A control device for an exhaust sensor is configured to control the exhaust sensor disposed in an exhaust passage of an internal combustion engine. The control device for an exhaust sensor includes: a sensor element; a heater configured to heat the sensor element; a current detection circuit configured to detect an output current of the exhaust sensor, and an electronic control device configured to control electric power that is supplied to the heater by PWM control.

Abstract: An abnormality detection device for an air-fuel ratio detection device arranged downstream of a filter is equipped with an abnormality detection unit that detects an abnormality in the air-fuel ratio detection device based on output change characteristics of the air-fuel ratio detection device during fuel cutoff control for stopping the supply of fuel to a combustion chamber of an internal combustion engine, and a combustion determination unit that determines whether or not a combustion amount of particulate matter in a filter during fuel cutoff control is larger than a predetermined amount. The abnormality detection unit prohibits detection of an abnormality in the air-fuel ratio detection device when the combustion determination unit determines that the combustion amount is larger than the predetermined amount.

Abstract: The abnormality diagnosis system 1 of a downstream side air-fuel ratio detection device 41, 42, comprises an air-fuel ratio control part 71 controlling an air-fuel ratio of an air-fuel mixture, an abnormality judgment part 72 judging abnormality of the downstream side air-fuel ratio detection device based on a characteristic of change of output of the downstream side air-fuel ratio detection device when the air-fuel ratio control part makes the air-fuel ratio of the air-fuel mixture change, and an oxygen change calculation part 73 calculating an amount of change of an oxygen storage amount of the catalyst when the air-fuel ratio control part makes the air-fuel ratio of the air-fuel mixture change. The abnormality judgment part does not judge abnormality of the downstream side air-fuel ratio detection device when the amount of change of the oxygen storage amount is less than a lower limit threshold value.

Abstract: A gas sensor includes a gas sensor element for detecting a specific gas concentration in measured gas. The gas sensor element includes a solid electrolyte, a measured gas side electrode into which measured gas is introduced through a porous diffusion resistance layer, a reference gas side electrode facing a reference gas chamber, and a diffusion space portion between the porous diffusion resistance layer and the measured gas side electrode. The porous diffusion resistance layer has a measured gas inlet opened to an element outer surface and a measured gas outlet opened to the diffusion space portion. A relationship between a distance between the inlet and the outlet and a distance between the outlet and the measured gas side electrode is expressed by 0<L1/(L1+L2)<0.4.

Abstract: A gas sensor includes a sensor element having a detecting portion; an insulator supporting the sensor element inserted therethrough; a housing supporting the insulator; an inner cover covering the detecting portion; and an outer cover covering the inner cover. An inner flange portion of the inner cover and the outer flange portion of the outer cover are supported between the insulator and the housing. An end face of the inner flange portion is positioned towards outer side R1 with respect to the radial direction R than the position of an end face of the outer flange portion. A corner portion between the end face and a surface in the outer flange portion protrudes into a surface of the inner flange portion.

Abstract: A gas sensor is provided with a sensor element having a detecting portion; an insulator supporting the sensor element in a state where the detecting portion is protruded therefrom, the sensor element being inserted through the insulator; a housing supporting the insulator; an inner cover covering the detecting portion; and an outer cover covering the inner cover. An inner flange portion of the inner cover and an outer flange portion of the outer cover are supported between the insulator and the housing. A protrusion is formed on a corner portion facing the insulator, the protrusion contacting with the insulator. An end face of the outer flange portion is positioned radially closer to an outer side with respect to a radial direction, than a position of an end face of the inner flange portion.

Abstract: A gas sensor includes a sensor element having a detecting portion; an insulator supporting the sensor element inserted therethrough; a housing supporting the insulator; an inner cover covering the detecting portion; and an outer cover covering the inner cover. An inner flange portion of the inner cover and the outer flange portion of the outer cover are supported between the insulator and the housing. An end face of the inner flange portion is positioned towards outer side R1 with respect to the radial direction R than the position of an end face of the outer flange portion. A corner portion between the end face and a surface in the outer flange portion protrudes into a surface of the inner flange portion.

Abstract: A gas sensor is provided with a sensor element having a detecting portion; an insulator supporting the sensor element in a state where the detecting portion is protruded therefrom, the sensor element being inserted through the insulator; a housing supporting the insulator; an inner cover covering the detecting portion; and an outer cover covering the inner cover. An inner flange portion of the inner cover and an outer flange portion of the outer cover are supported between the insulator and the housing. A protrusion is formed on a corner portion facing the insulator, the protrusion contacting with the insulator. An end face of the outer flange portion is positioned radially closer to an outer side with respect to a radial direction, than a position of an end face of the inner flange portion.

Abstract: A projector comprising a light modulating device which modulates light beams emitted from a light source, according to image information, to form an optical image; a projection optical device, the projection optical device including a projection lens, which has a plurality of lenses, that enlarges and projects the optical image onto the screen; a focal position changing unit, to perform focus adjustment on the image; a setting input unit through which automatic adjustment information for changing the focal position to an in-focus position where the projected image is in an in-focus state is input; and a focus adjustment control unit which controls the focal position changing unit until the projected image is in the in-focus state.

Abstract: A projector including a light modulating device which modulates light beams emitted from a light source according to image information to form an optical image, a projection optical device, the projection optical device including a projection lens which has a plurality of lenses and enlarges and projects the optical image onto the screen, a focal position changing unit, to perform focus adjustment on the image, a setting input unit through which automatic adjustment information for changing the focal position to an in-focus position where the projected image is in an in-focus state is input, and a focus adjustment control unit which controls the focal position changing unit until the projected image is in the in-focus state.

Abstract: To provide a technique for facilitating control of a plurality of projectors. A projection display system comprises a plurality of projectors wherein a plurality of images projected by the projectors are displayed on a common projection screen. Each projector comprises: a control signal processor for processing a control signal given from an external device and generating a processed control signal; and a signal input/output section for input/output of the control signal and the processed control signal. The plurality of projectors are coupled in a cascade connection, by interconnecting the signal input/output sections of the projectors. The control signal and the processed control signal include connection sequence data indicating the cascade connection sequence. The control signal processor of each projector comprises a memory for storing, on the basis of a given control signal, a connection sequence when the projectors are coupled in a cascade connection.

Abstract: Single-sided conductor patterned films are prepared, each of which has a conductor pattern formed only one side of a resin film and via hole filled with conductive paste. A single-sided conductor patterned film which has a conductor pattern formed only one side of a resin film and an opening formed in the resin film so as to expose an electrode is laminated on the single-sided conductor patterned films. Moreover, a cover layer with an opening to expose an electrode is laminated on a bottom surface of the single-sided conductor patterned films to form a laminate. Then, by pressing while heating the laminate, a multilayer substrate having the electrodes at both sides thereof can be produced.

Abstract: To provide a technique for facilitating control of a plurality of projectors. A projection display system comprises a plurality of projectors wherein a plurality of images projected by the projectors are displayed on a common projection screen. Each projector comprises: a control signal processor for processing a control signal given from an external device and generating a processed control signal; and a signal input/output section for input/output of the control signal and the processed control signal. The plurality of projectors are coupled in a cascade connection, by interconnecting the signal input/output sections of the projectors. The control signal and the processed control signal include connection sequence data indicating the cascade connection sequence. The control signal processor of each projector comprises a memory for storing, on the basis of a given control signal, a connection sequence when the projectors are coupled in a cascade connection.

Abstract: To provide a technique for facilitating control of a plurality of projectors. A projection display system comprises a plurality of projectors wherein a plurality of images projected by the projectors are displayed on a common projection screen. Each projector comprises: a control signal processor for processing a control signal given from an external device and generating a processed control signal; and a signal input/output section for input/output of the control signal and the processed control signal. The plurality of projectors are coupled in a cascade connection, by interconnecting the signal input/output sections of the projectors. The control signal and the processed control signal include connection sequence data indicating the cascade connection sequence. The control signal processor of each projector comprises a memory for storing, on the basis of a given control signal, a connection sequence when the projectors are coupled in a cascade connection.

Abstract: The present invention executes a projected image correction method and a projector that can execute keystone correction of larger amount without modifying or replacing a keystone correction device. A projector according to the invention includes a signal scale down device that scales down image signals that are input, a keystone correction device that executes keystone correction for the scaled down image signals, a buffer that temporarily stores the image signals for keystone correction, and a signal interpolation device that interpolates the corrected image signals.

Abstract: Single-sided conductor patterned films are prepared, each of which has a conductor pattern formed only one side of a resin film and via hole filled with conductive paste. A single-sided conductor patterned film which has a conductor pattern formed only one side of a resin film and an opening formed in the resin film so as to expose an electrode is laminated on the single-sided conductor patterned films. Moreover, a cover layer with an opening to expose an electrode is laminated on a bottom surface of the single-sided conductor patterned films to form a laminate. Then, by pressing while heating the laminate, a multilayer substrate having the electrodes at both sides thereof can be produced.