Abstract: A suspension system (vehicle) includes: an air suspension that is inserted between a vehicle body and each of wheels and that is capable of extending and contracting by means of pressure of working fluid; a compressed air control unit that controls the working fluid; an electric power supplier that supplies electric power to the compressed air control unit; and a power saver that stops flow of the working fluid when abnormality occurs in the electric power supplier. When a vehicle has a predetermined vehicle height, the power saver stops the flow of the working fluid, and when the vehicle has a vehicle height other than the predetermined vehicle height, the power saver allows the working fluid to flow until the vehicle height reaches the predetermined vehicle height, and then stops the flow of the working fluid.

Abstract: The vehicle height adjustment device includes: a vehicle height adjuster which adjusts vehicle height; a prohibiting mode setter which sets a prohibiting mode that prohibits vehicle height adjustment by the vehicle height adjuster; a first prohibition release unit which performs release of the prohibiting mode in the prohibiting mode setter; and a second prohibition release unit which enables vehicle height adjustment by the vehicle height adjuster, while the prohibiting mode is set by the prohibiting mode setter.

Abstract: A suspension system (vehicle) includes: an air suspension that is inserted between a vehicle body and each of wheels and that is capable of extending and contracting by means of pressure of working fluid; a compressed air control unit that controls the working fluid; an electric power supplier that supplies electric power to the compressed air control unit; and a power saver that stops flow of the working fluid when abnormality occurs in the electric power supplier. When a vehicle has a predetermined vehicle height, the power saver stops the flow of the working fluid, and when the vehicle has a vehicle height other than the predetermined vehicle height, the power saver allows the working fluid to flow until the vehicle height reaches the predetermined vehicle height, and then stops the flow of the working fluid.

Abstract: This vibration damping device (10) includes a magnetorheological fluid composition in a cylinder (12). The magnetorheological fluid composition includes magnetic particles; a dispersant having the magnetic particles dispersed therein; and a friction modifier. The friction modifier is an ester-based additive having a hydrocarbon chain having 14 to 22 carbon atoms, preferably an alkyl chain or an alkenyl chain. The content of the friction modifier is 0.1 to 5 mass %.

Abstract: This vibration damping device (10) includes a magnetorheological fluid composition in a cylinder (12). The magnetorheological fluid composition includes magnetic particles; a dispersant having the magnetic particles dispersed therein; and a friction modifier. The friction modifier is an amine-based additive having a hydrocarbon chain having 14 to 22 carbon atoms, preferably an alkyl chain or an alkenyl chain. The content of the friction modifier is 0.1 to 5 mass %.

Abstract: An object of the present invention is to provide a vibration damping device including a bearing member capable of achieving simplification of configuration in the vibration damping device, reducing frictional force during operation, and having an excellent wear resistance. A vibration damping device of the present invention includes a bearing structure, in which a metal bush (bearing member) has a resin layer on a side defined as a friction sliding surface of a base member, the resin layer includes polytetrafluoroethylene and a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin, and the metal bush is lubricated by a magneto-rheological fluid composition.

Abstract: This vibration damping device (10) includes a magnetorheological fluid composition in a cylinder (12). The magnetorheological fluid composition includes magnetic particles; a dispersant having the magnetic particles dispersed therein; and a friction modifier. The friction modifier is an ester-based additive having a hydrocarbon chain having 14 to 22 carbon atoms, preferably an alkyl chain or an alkenyl chain. The content of the friction modifier is 0.1 to 5 mass %.

Abstract: An object of the present invention is to provide a vibration damping device including a bearing member capable of achieving simplification of configuration in the vibration damping device, reducing frictional force during operation, and having an excellent wear resistance. A vibration damping device of the present invention includes a bearing structure, in which a metal bush (bearing member) has a resin layer on a side defined as a friction sliding surface of a base member, the resin layer includes polytetrafluoroethylene (PTFE) and a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin, and the metal bush is lubricated by a magneto-rheological fluid composition.

Abstract: This vibration damping device (10) includes a magnetorheological fluid composition in a cylinder (12). The magnetorheological fluid composition includes magnetic particles; a dispersant having the magnetic particles dispersed therein; and a friction modifier. The friction modifier is an amine-based additive having a hydrocarbon chain having 14 to 22 carbon atoms, preferably an alkyl chain or an alkenyl chain. The content of the friction modifier is 0.1 to 5 mass %.