A suspension controller includes a target current setting unit configured to set a target current value, a current limitation setting unit configured to set a current limitation value, a current detector configured to detect a current value of a first current supplied to a solenoid that is configured to control a damping force of a suspension, a duty ratio setting unit configured to set a duty ratio based on the target current value, based on the current limitation value, and based on the current value detected by the current detector; and a current outputting unit configured to supply the solenoid with a second current that corresponds to the duty ratio set by the duty ratio setting unit and to a power supply voltage. The current limitation setting unit is configured to change the current limitation value based on the duty ratio set by the duty ratio setting unit.

The present invention provides a steering system for an in-wheel motor vehicle capable of controlling driving torques and speeds of in-wheel motors mounted in left and right wheels to be different from each other at the time of curve driving of the vehicle to generate a steering angle of the wheel for the curve driving, and performing a steering angle control of sensing the generated steering angle and fixing the steering angle to a desired steering angle.

The present invention provides a steering system for an in-wheel motor vehicle capable of controlling driving torques and speeds of in-wheel motors mounted in left and right wheels to be different from each other at the time of curve driving of the vehicle to generate a steering angle of the wheel for the curve driving, and performing a steering angle control of sensing the generated steering angle and fixing the steering angle to a desired steering angle.

A suspension apparatus includes a main body, a first arm configured to support a wheel with respect to the main body, a second arm spaced apart from the first arm and having a guide rail, a shock absorber disposed between the second arm and the main body, a first support member disposed on one side of the shock absorber and rotatably connected to the main body, a second support member disposed on another side of the shock absorber and seated on the guide rail, and a driver configured to adjust a height of the main body by moving the second support member along the guide rail.

A suspension apparatus includes a main body, a first arm configured to support a wheel with respect to the main body, a second arm spaced apart from the first arm and having a guide rail, a shock absorber disposed between the second arm and the main body, a first support member disposed on one side of the shock absorber and rotatably connected to the main body, a second support member disposed on another side of the shock absorber and seated on the guide rail, and a driver configured to adjust a height of the main body by moving the second support member along the guide rail.

According to an embodiment, a coil spring is formed of a wire which is helically wound, and includes an end turn portion and an effective portion, and a surface of the wire in the end turn portion includes an area which is softer than a surface of the wire in the effective portion.

A cylinder device includes a cylinder that has one end from which a piston rod extends, a pipe-shaped cover member that has an extendable bellows portion and a small-diameter portion whose inner diameter is smaller than an inner diameter of the bellows portion, the cover member being configured to protect the piston rod, and a capping member fitted into the cylinder, the capping member having a convex portion to which the small-diameter portion of the cover member is locked, at an outer periphery, wherein at the small-diameter portion of the cover member, a bulge portion that bulges outside in a radial direction is formed.

A cylinder device includes a cylinder that has one end from which a piston rod extends, a pipe-shaped cover member that has an extendable bellows portion and a small-diameter portion whose inner diameter is smaller than an inner diameter of the bellows portion, the cover member being configured to protect the piston rod, and a capping member fitted into the cylinder, the capping member having a convex portion to which the small-diameter portion of the cover member is locked, at an outer periphery, wherein at the small-diameter portion of the cover member, a bulge portion that bulges outside in a radial direction is formed.

A device for adjusting the height of a vehicle body, containing a movement thread, which is arranged between the vehicle body and a wheel carrier. The movement thread has two threaded parts that can be rotated in relation to each other, which are formed by a spindle and a spindle nut, and a locking apparatus, which bridges the movement thread at at least two axial positions in a positive-locking manner and which has a locking sleeve having locking stops arranged over the periphery at different axial positions. The device is characterized in that the locking sleeve is modularly formed of a stack of at least one locking element containing locking stops and groove sections and at least one intermediate element containing only groove sections.

A device for adjusting the height of a vehicle body, containing a movement thread, which is arranged between the vehicle body and a wheel carrier. The movement thread has two threaded parts that can be rotated in relation to each other, which are formed by a spindle and a spindle nut, and a locking apparatus, which bridges the movement thread at at least two axial positions in a positive-locking manner and which has a locking sleeve having locking stops arranged over the periphery at different axial positions. The device is characterized in that the locking sleeve is modularly formed of a stack of at least one locking element containing locking stops and groove sections and at least one intermediate element containing only groove sections.