초록 ▼

A failure determination device that detects the humidity of exhaust gases from an internal combustion engine and a control system for an exhaust passage changeover valve, which can switch the changeover valve with appropriate timing, thereby enabling sufficient purification of exhaust gases. An oper

A failure determination device that detects the humidity of exhaust gases from an internal combustion engine and a control system for an exhaust passage changeover valve, which can switch the changeover valve with appropriate timing, thereby enabling sufficient purification of exhaust gases. An operating condition of the engine is detected. Based on the detected operating condition of the engine, it is determined whether the engine is in an operating condition in which failure determination of the humidity sensor can be executed. It is determined whether the humidity sensor has failed, based on a result of detection by the humidity sensor, when it has been judged that the failure determination of the humidity sensor can be executed.

대표청구항 ▼

A failure determination device that detects the humidity of exhaust gases from an internal combustion engine and a control system for an exhaust passage changeover valve, which can switch the changeover valve with appropriate timing, thereby enabling sufficient purification of exhaust gases. An oper

A failure determination device that detects the humidity of exhaust gases from an internal combustion engine and a control system for an exhaust passage changeover valve, which can switch the changeover valve with appropriate timing, thereby enabling sufficient purification of exhaust gases. An operating condition of the engine is detected. Based on the detected operating condition of the engine, it is determined whether the engine is in an operating condition in which failure determination of the humidity sensor can be executed. It is determined whether the humidity sensor has failed, based on a result of detection by the humidity sensor, when it has been judged that the failure determination of the humidity sensor can be executed. f claim 3 wherein the void material comprises lightweight balls comprised of molded and sealed paper products. 5. The structural panel of claim 4 wherein the lightweight balls are comprised of paper molded into a spherical shape and sealed with a thin paraffin coating. 6. The structural panel of claim 3 wherein the surface panel is comprised of the same concrete mixture as the flat face without additives to provide a smooth surface for decoration. 7. The structural panel of claim 1 wherein each of the third plurality of nodes is a circle having a center axis, the center axis having an insert mounted thereon. 8. The structural panel of claim 1 adapted to be attached to another structural panel by mortar. 9. The structural panel of claim 1 wherein each of the repeating isosceles triangles is empty. 10. A structural panel comprises an integrally formed isogrid web and a flat face covering one open side of the isogrid web and four sidewalls forming the edges of the isogrid web, the flat face and the sidewall forming, in combination, an open topped box like structure, the isogrid web comprising a first plurality of ribs only oriented vertically, each of the first plurality of ribs extending continuously between opposing sidewalls, the first plurality of ribs thereby providing columnar support for the structural panel, a second plurality of ribs oriented at an angle to the first plurality of ribs, a first half of the second plurality of ribs having the angle measured clockwise from the first plurality of ribs, a second half of the second plurality of ribs having the angle measured counterclockwise from the first plurality of ribs, each of the second plurality of ribs extending continuously between sidewalls, the second plurality of ribs thereby providing lateral support for the structural panel, the first plurality of ribs and the second plurality of ribs forming, in combination, a pattern of repeating isosceles triangles thereby forming the isogrid web, the isogrid web comprising an aggregate mixture of concrete, selected gravel aggregate and void material, the first plurality of ribs and the second plurality of ribs meeting only at a third plurality of nodes forming the vertices of said repeating isosceles triangles, each of the third plurality of nodes comprising a juncture of one of the first plurality of ribs, one of the first half of the second plurality of ribs and one of the second half of the second plurality of ribs, each of the third plurality of nodes being a circle having a center axis, the center axis having an insert mounted thereon, the flat face being comprised of an upper layer integral with the first and second plurality of ribs and a surface panel covering the upper layer, the upper layer and the first and second plurality of ribs being comprised of an aggregate mixture of concrete, selected gravel aggregate and void material, the void material comprising lightweight balls comprised of molded and sealed paper products, the surface panel being comprised of the same concrete mixture as the flat face without additives to provide a smooth surface for decoration. 11. The structural panel of claim 10 wherein the lightweight balls are comprised of paper molded into a spherical shape and sealed with a thin paraffin coating.