A damping force generating mechanism includes: a flow passage formation part that forms a flow passage through which a liquid flows; and a valve that is configured to control a flow of the liquid in the flow passage. The flow passage formation part includes a first seat part that is provided radially outward of a flow passage port of the flow passage, protrudes from the flow passage port and contacts the valve, a second seat part that is provided radially outward of the first seat part, protrudes from the flow passage port and contacts the valve, and a circulation part having an orifice that allows the liquid to flow from the flow passage port toward the second seat part in a state in which the valve is in contact with the first seat part.

The present disclosure relates to a shock absorber, in more detail, a damping force controlling shock absorber of which a damping force characteristic can be appropriately adjusted. A damping force controlling shock absorber according to the present disclosure includes: a cylinder formed in a double structure of an inside and an outside, having an internal space divided into a compression chamber and a rebound chamber by a piston valve, and having a reservoir chamber in an external space; a compression solenoid valve mounted on the cylinder; a rebound solenoid valve mounted on the cylinder; and a check valve disposed in the rebound solenoid valve, and opening and closing a channel connecting the reservoir chamber and the rebound chamber.

A valve arrangement comprising a main valve member being axially movably arranged in a valve housing and arranged to interact with a main valve seat of the valve housing in order to restrict or regulate a pressure in a main fluid flow in response to a pilot pressure acting on the main valve member. A control valve member is axially movable within the main valve member in response to an actuating force acting on the control valve member. A pilot valve member is axially movable within the control valve member, and is arranged to interact with a pilot valve seat of the control valve member to restrict a pilot fluid flow out from a pilot chamber. The pilot valve member is resiliently loaded towards the pilot valve seat relative the main valve member or the valve housing, such that the resilient loading on the pilot valve member is adjustable in response to the actuating force.

A damping force adjustable shock absorber in2cludes an electromagnetic damping force adjustment device (17) having a damping force adjustment valve (18), and a solenoid (33) configured to variably adjust the damping force. The solenoid includes a coil (39) configured to generate a magnetic force by power supply, a movable iron core (43) located on an inner peripheral side of the coil, an anchor member (40) configured to attract the movable iron core. The movable iron core includes a thick cylindrical portion (43A) and a taper cylindrical portion (43B). The thick cylindrical portion includes a fixation hole (43A1) in which a shaft portion (44) is fixed. The taper cylindrical portion has an inner peripheral surface flaring so as to define a taper shape. A recessed portion (43A2) is formed around the fixation hole. The recessed portion allows hydraulic fluid to flow in an axial direction of the movable iron core.

A damping valve includes a valve disc including a passage and a valve seat configured to surround an outlet end of the passage, a leaf valve configured to separate from/sit on the valve seat to open/close the passage, and a biasing part configured to exert a variable biasing force on the leaf valve toward the valve disc, and a gap is provided between the leaf valve and the valve seat.

An adjustable damping valve device has a first adjustable damping valve assembly for a first flow direction and a second adjustable damping valve assembly for a second flow direction. The two damping valve assemblies are adjustable independently from one another, and the first damping valve assembly generates a damping force for only one flow direction and the second damping valve assembly has a minimum cross section through which damping medium can flow in the setting for maximum damping force so that the second damping valve device generates a damping force in both flow directions.

A damping force adjustable shock absorber includes an electromagnetic damping force adjustment device (17) having a damping force adjustment valve (18), and a solenoid (33) configured to variably adjust the damping force. The solenoid includes a coil (39) configured to generate a magnetic force by power supply, a movable iron core (43) located on an inner peripheral side of the coil, an anchor member (40) configured to attract the movable iron core. The movable iron core includes a thick cylindrical portion (43A) and a taper cylindrical portion (43B). The thick cylindrical portion includes a fixation hole (43A1) in which a shaft portion (44) is fixed. The taper cylindrical portion has an inner peripheral surface flaring so as to define a taper shape. A recessed portion (43A2) is formed around the fixation hole. The recessed portion allows hydraulic fluid to flow in an axial direction of the movable iron core.

A bumper cap assembly for an electrically adjustable hydraulic shock absorber. The bumper cap assembly includes a printed circuit board assembly and a bumper cap. The printed circuit board assembly includes power drive electronics and is electrically coupled to the shock absorber. The bumper cap defined a gap, wherein the printed circuit board assembly is housed within the gap.

Disclosed is a variable damping force shock absorber including a tube cylinder having an inner tube filled with a fluid and an outer tube, a valve housing coupled to a piston rod in the inner tube and having a connection flow path formed therein, a first piston valve coupled to the outside of the valve housing to partition the inner tube into a compression chamber and a rebound chamber, and a second piston valve provided inside the valve housing, wherein the valve housing includes a magnet provided at an upper portion thereof and connected to the piston rod, and a plunger disposed between the magnet and the second piston valve at a lower portion thereof to selectively open and close the connection flow path by a magnetic field of the magnet, and wherein the fluid passes only through the first piston valve when the plunger closes the connection flow path, and the fluid passes through the first piston valve and the second piston valve when the plunger opens the connection flow path.

An electromagnetic and pilot-operated proportional valve with a valve slide unit (12) mounted in a valve housing (10) so as to be movable along an axial direction, which unit can be driven by an electromagnetic actuator assembly (16) provided at one axial end for the pilot-operated opening of a useful fluid inlet and/or outlet (24) of the valve housing as a response to energisation of a stationary coil (20) of the actuator assembly and interacts with mechanical force storage means (48, 50), more particularly is held in an unenergised stable axial position in the valve housing by said means, wherein the valve slide unit having a closure section (22) extending radially from one body section (30) of the valve slide unit (12) for sealing interaction with the useful fluid inlet or outlet (24) formed on a circumferential inner wall of the housing (10) interacts axially at one end, by means of the preferably cylindrical and/or coaxially extending body section (22), with a stationary guide section (40) of the valve housing to form an axial sliding bearing (62) and, at the other end, is mounted with radial play (56), wherein preferably ring-shaped sealing means (32) seal a circumferential section of the body section with radial play to the circumferential inner wall of the valve housing.