Disclosed herein is a cooling device comprising a cooler body, wherein the cooler body has a first chamber and a second chamber, a cooler body cap disposed to fluidly couple the first chamber and the second chamber, wherein the cooler body cap has a recess that is suitable to receive a base valve, a first hose that is fluidly coupled to the first chamber, a second hose that is fluidly coupled to the second chamber, and an adapter, wherein the adapter is connected to the first hose and the second hose, wherein the adapter has channels to direct fluid flow.

A damping force generating mechanism includes: a flow passage formation part that forms a flow passage through which a liquid flows; a valve configured to control a flow of the liquid in the flow passage; a back pressure control valve configured to control a pressure in a back pressure chamber that provides a back pressure to the valve by inflow of the liquid; and an accommodation part that is in a tubular shape with one side opening end narrower than another side opening end, forms the back pressure chamber, and accommodates at least the valve and the back pressure control valve.

A damping force generating mechanism includes: a flow passage formation part that forms a flow passage through which a liquid flows; a valve configured to control a flow of the liquid in the flow passage; a back pressure control valve configured to control a pressure in a back pressure chamber that provides a back pressure to the valve by inflow of the liquid; and an accommodation part that is in a tubular shape with one side opening end narrower than another side opening end, forms the back pressure chamber, and accommodates at least the valve and the back pressure control valve.

A suspension control system includes: a first electric current setting unit configured to set a first electric current based on an actual damping speed; a second electric current setting unit configured to set a second electric current based on a model damping speed; a weight coefficient setting unit configured to set a weight coefficient based on the actual damping speed; and a target electric current setting unit configured to set a sum of a first value and a second value as a target electric current of the damper, the first value being obtained by multiplying the second electric current by the weight coefficient, the second value being obtained by multiplying the first electric current by a value obtained by subtracting the weight coefficient from one. The first electric current setting unit is configured to make the first electric current smaller than the second electric current in a prescribed case.

A suspension control system includes: a first electric current setting unit configured to set a first electric current based on an actual damping speed; a second electric current setting unit configured to set a second electric current based on a model damping speed; a weight coefficient setting unit configured to set a weight coefficient based on the actual damping speed; and a target electric current setting unit configured to set a sum of a first value and a second value as a target electric current of the damper, the first value being obtained by multiplying the second electric current by the weight coefficient, the second value being obtained by multiplying the first electric current by a value obtained by subtracting the weight coefficient from one. The first electric current setting unit is configured to make the first electric current smaller than the second electric current in a prescribed case.

An electronic valve assembly for a vehicle suspension damper is described in which a first electronic valve is disposed along a fluid flow path extending between a compression region of a damping cylinder and a fluid reservoir chamber. The first electronic valve controls flow of fluid from the compression region into the fluid reservoir chamber. A second electronic valve is disposed along a fluid flow path extending between a rebound region of the damping cylinder and the compression region. The second electronic valve controls flow of fluid from the rebound region into the compression. The first electronic valve does not reside in the fluid flow path extending from the rebound region into the compression region, and the second electronic valve does not reside in the fluid flow path extending from the compression region into the fluid reservoir chamber.

An electronic valve assembly for a vehicle suspension damper is described in which a first electronic valve is disposed along a fluid flow path extending between a compression region of a damping cylinder and a fluid reservoir chamber. The first electronic valve controls flow of fluid from the compression region into the fluid reservoir chamber. A second electronic valve is disposed along a fluid flow path extending between a rebound region of the damping cylinder and the compression region. The second electronic valve controls flow of fluid from the rebound region into the compression. The first electronic valve does not reside in the fluid flow path extending from the rebound region into the compression region, and the second electronic valve does not reside in the fluid flow path extending from the compression region into the fluid reservoir chamber.

A vibration damper for vehicles includes a damper tube which is at least partially filled with damper medium and which has a longitudinal axis along which a piston rod is movable back and forth. A working piston is movable jointly with the piston rod, by means of which working piston the interior space of the damper tube is divided into a piston-rod-side working space and a piston-rod-remote working space. The vibration damper has a leakage indicator for the damper medium.

A vibration damper for vehicles includes a damper tube which is at least partially filled with damper medium and which has a longitudinal axis along which a piston rod is movable back and forth. A working piston is movable jointly with the piston rod, by means of which working piston the interior space of the damper tube is divided into a piston-rod-side working space and a piston-rod-remote working space. The vibration damper has a leakage indicator for the damper medium.

A damper assembly has a longitudinal axis and includes a damper housing with a side wall portion and an end wall portion defining a damping chamber containing a quantity of damping fluid. A photon source and a photon receptor are operatively disposed in optical communication with the non-gaseous damping fluid in the damping chamber. The photon source is operable to direct a photon through the non-gaseous damping fluid toward an associated target surface. The photon receptor is operable to receive the photon reflected off the associated target surface through the non-gaseous damping fluid. A sensor suitable for such use as well as spring and damper assemblies and suspension systems are also included.