A damping force adjustment device is provided. A damping force adjustment device comprises a pilot poppet raised and lowered by a magnetic force and a main poppet in which at least a portion of the pilot poppet is accommodated. Moreover, the damping force adjustment device comprises an elastic unit between at least a portion of an outer peripheral surface of the pilot poppet and an inner peripheral surface of one region of the main poppet where the pilot poppet is accommodated.

A damping force adjustment device is provided. A damping force adjustment device comprises a pilot poppet raised and lowered by a magnetic force and a main poppet in which at least a portion of the pilot poppet is accommodated. Moreover, the damping force adjustment device comprises an elastic unit between at least a portion of an outer peripheral surface of the pilot poppet and an inner peripheral surface of one region of the main poppet where the pilot poppet is accommodated.

A damping force adjusting mechanism includes: a case housing an operating fluid; a sealing member separating an inside of the case into first and second fluid chambers; a housing holding the sealing member and housing the sealing member in the case; a damping valve housed inside the housing and controlling the first and second fluid chambers; first and second pilot chambers formed inside the housing; first and second communication passages communicating the first and second fluid chambers with the first and second pilot chambers; first and second fixed orifices interposed in the first and second communication passages; a control chamber formed inside the housing and communicating with the first and second pilot chambers; a control valve housed inside the control chamber, separating the control chamber into first and second control chambers, and selecting a flow of the fluid; and an actuator controlling the control valve and a fluid pressure.

A damping force adjusting mechanism includes: a case housing an operating fluid; a sealing member separating an inside of the case into first and second fluid chambers; a housing holding the sealing member and housing the sealing member in the case; a damping valve housed inside the housing and controlling the first and second fluid chambers; first and second pilot chambers formed inside the housing; first and second communication passages communicating the first and second fluid chambers with the first and second pilot chambers; first and second fixed orifices interposed in the first and second communication passages; a control chamber formed inside the housing and communicating with the first and second pilot chambers; a control valve housed inside the control chamber, separating the control chamber into first and second control chambers, and selecting a flow of the fluid; and an actuator controlling the control valve and a fluid pressure.

A chassis controller and method for controlling the damping of a human-powered two-wheeled vehicle having a controllable shock absorber and a control device and a memory device. A sensor device acquires measurement data sets relating to a relative movement of two connecting units of the shock absorber with respect to one another. A filter device pre-processes the measurement data sets. Multiple data sets are stored in the memory device. A data set, derived from a measurement data set acquired with the sensor device during the relative movement of the connecting units is stored and an analysis device analyzes a stored data set. A filter parameter set is determined based on the analysis, and a control data set is derived with the filter parameter set. The control device controls the shock absorber with the control data set.

A chassis controller and method for controlling the damping of a human-powered two-wheeled vehicle having a controllable shock absorber and a control device and a memory device. A sensor device acquires measurement data sets relating to a relative movement of two connecting units of the shock absorber with respect to one another. A filter device pre-processes the measurement data sets. Multiple data sets are stored in the memory device. A data set, derived from a measurement data set acquired with the sensor device during the relative movement of the connecting units is stored and an analysis device analyzes a stored data set. A filter parameter set is determined based on the analysis, and a control data set is derived with the filter parameter set. The control device controls the shock absorber with the control data set.

Provided is a liquid pressure device having no dead band in generation of force and causing no contamination, the liquid pressure device including a bottom cap and a head cap welded to an outer tube, and a rod guide fastened to the head cap, and one end of a pipe is fit in the bottom cap and the other end of the pipe is fit in the rod guide, and the bottom cap and the rod guide sandwich a cylinder. Accordingly, the liquid pressure device of the present invention can add shaft force to the cylinder while supporting the pipe, an inside of which is isolated from a tank, by the bottom cap and the rod guide, and does not need to braze the pipe to the bottom cap. Therefore, the liquid pressure device of the present invention has no dead band in generation of force and causes no contamination.

Provided is a liquid pressure device having no dead band in generation of force and causing no contamination, the liquid pressure device including a bottom cap and a head cap welded to an outer tube, and a rod guide fastened to the head cap, and one end of a pipe is fit in the bottom cap and the other end of the pipe is fit in the rod guide, and the bottom cap and the rod guide sandwich a cylinder. Accordingly, the liquid pressure device of the present invention can add shaft force to the cylinder while supporting the pipe, an inside of which is isolated from a tank, by the bottom cap and the rod guide, and does not need to braze the pipe to the bottom cap. Therefore, the liquid pressure device of the present invention has no dead band in generation of force and causes no contamination.

A gas spring and gas damper assembly includes a gas spring and a gas damper. The gas spring includes a flexible spring member with opposing end members secured thereto and at least partially defining a spring chamber. The gas damper includes an inner sleeve that is at least partially received within one of the end members and at least partially forms a damping chamber. A damper piston assembly is received within the damping chamber and secured to the other of the end members. An elongated damping passage fluidically connects the damping chamber and the spring chamber. Suspension systems and methods are also included.

A gas spring and gas damper assembly includes a gas spring and a gas damper. The gas spring includes a flexible spring member with opposing end members secured thereto and at least partially defining a spring chamber. The gas damper includes an inner sleeve that is at least partially received within one of the end members and at least partially forms a damping chamber. A damper piston assembly is received within the damping chamber and secured to the other of the end members. An elongated damping passage fluidically connects the damping chamber and the spring chamber. Suspension systems and methods are also included.