Abstract: A position detection device includes a first position detector, a second position detector, and a signal generator. The first position detector includes a first magnetic field generation unit, a second magnetic field generation unit, and a first magnetic sensor. The second position detector includes a third magnetic field generation unit, a fourth magnetic field generation unit, and a second magnetic sensor. The positions of the second and fourth magnetic field generation units vary in response to variations in a detection-target position. The signal generator generates a position detection signal, which is the sum of a first detection signal generated by the first magnetic sensor and a second detection signal generated by the second magnetic sensor. Each of the first and second position detectors includes a bias magnetic field generation unit.

Abstract: An information collection system includes: a vehicle registration information acquisition unit configured to access a vehicle registration DB, and acquire vehicle registration information including an identification code and a vehicle model of the vehicles; a communication control unit configured to communicate with the vehicles; a required number setting unit configured to set a number of the vehicles required when acquiring vehicle use information of the vehicles of a specified vehicle model based on a predetermined information acquisition condition; an information acquisition target vehicle extraction unit configured to extract the required number of the vehicles from the vehicles of the specified vehicle model registered in the vehicle registration DB; and a vehicle use information acquisition unit configured to transmit vehicle use information transmission request information requesting transmission of the vehicle use information to the vehicles extracted by the information acquisition target vehicle ext

Abstract: To provide a seal layer-transferred metal gasket that can effectively prevent degradation in seal performance due to the wearing and peeling of the coating layer. A head gasket is interposed between a cylinder block and a cylinder head. In the metal gasket seal layers made by laminating a separation layer, a coating layer and an adhesive layer in this order from the bead sheet side is formed at least on the surface of the bead sheet facing the cylinder block and the cylinder head, and, in a state where the head gasket is interposed between the cylinder block and the cylinder head and the three objects are closely attached to each other, the adhesive layer is adhered to the seal target members, and at least some portions of the coating layer and adhesive layer are separated from the bead sheet with a boundary at the separation layer and then transferred to the seal areas of the cylinder block and cylinder head.

Abstract: To provide a seal layer-transferred metal gasket that can effectively prevent degradation in seal performance due to the wearing and peeling of the coating layer. A head gasket 1 is interposed between a cylinder block 2 and a cylinder head 3. In the metal gasket 1, seal layers 20 and 21 made by laminating a separation layer, a coating layer and an adhesive layer in this order from the bead sheet side is formed at least on the surface of the bead sheet 10 facing the cylinder block 2 and the cylinder head 3, and, in a state where the head gasket 1 is interposed between the cylinder block 2 and the cylinder head 3 and the three objects are closely attached to each other, the adhesive layer is adhered to the seal target members, and at least some portions of the coating layer and adhesive layer are separated from the bead sheet 10 with a boundary at the separation layer and then transferred to the seal areas 4 and 5 of the cylinder block 2 and cylinder head 3.

Abstract: To provide a metal gasket that can be manufactured at an inexpensive cost and provides sufficient sealing performance around a combustion chamber while preventing a bore bead from fully bending. A metal gasket 1 is constructed from one or more gasket component sheets 10 with an opening 12 formed at a position corresponding to a combustion chamber 6 of an engine, and at least one gasket component sheet 10 has a bore bead 16 formed so as to surround the opening 12. In this metal gasket, a shim sheet 11 for controlling the full bending of the bore bead 16 is fixed to the gasket component sheet 10 in an area between the outer peripheral edge of the bore bead 16 and the inner periphery 7a of a water jacket 7 formed on a cylinder block 2 of the engine.

Abstract: A metal gasket capable of preventing the occurrence of cracks in a stopper while employing a wave-shaped stopper, improving the contact pressure balance around the bead to enhance the engine performance, and improving the durability of the stopper. The metal gasket is constituted by a gasket component sheet having an opening formed to face a combustion chamber, and the gasket component sheet is provided with a combustion chamber bead surrounding the opening. An inner circumference side stopper lower than the height of the combustion chamber bead is formed along the combustion chamber bead in a portion between the combustion chamber bead and the opening such that at least a section of each wave where stress amplitude is large becomes thin, a thin portion and a thick portion are arranged alternately in each wave, and the hardness of the thin portion is higher than that of the thick portion.

Abstract: A metal gasket capable of preventing the occurrence of cracks in a stopper while employing a wave-shaped stopper, improving the contact pressure balance around the bead to enhance the engine performance, and improving the durability of the stopper. The metal gasket is constituted by a gasket component sheet having an opening formed to face a combustion chamber, and the gasket component sheet is provided with a combustion chamber bead surrounding the opening. An inner circumference side stopper lower than the height of the combustion chamber bead is formed along the combustion chamber bead in a portion between the combustion chamber bead and the opening such that at least a section of each wave where stress amplitude is large becomes thin, a thin portion and a thick portion are arranged alternately in each wave, and the hardness of the thin portion is higher than that of the thick portion.

Abstract: A metal gasket capable of preventing the occurrence of cracks in a stopper while employing a wave-shaped stopper, improving the contact pressure balance around the bead to enhance the engine performance, and improving the durability of the stopper. The metal gasket is constituted by a gasket component sheet having an opening formed to face a combustion chamber, and the gasket component sheet is provided with a combustion chamber bead surrounding the opening. An inner circumference side stopper lower than the height of the combustion chamber bead is formed along the combustion chamber bead in a portion between the combustion chamber bead and the opening such that at least a section of each wave where stress amplitude is large becomes thin, a thin portion and a thick portion are arranged alternately in each wave, and the hardness of the thin portion is higher than that of the thick portion.