A steering damper can minimize a mounting space and can achieve favorable damping force characteristics. A rod member is mounted on a side of a first end of a piston and passes through a side of a first end of the damper case. A cylinder has a stepped configuration including a small-diameter cylinder and a large-diameter cylinder. Insertion of the piston in the cylinder causes an oil chamber filled with damper oil to be divided into a first oil chamber that has the small-diameter cylinder as an outer circumference, a second oil chamber that has the large-diameter cylinder as an outer circumference and that contacts the rod member, and a third oil chamber that has the large-diameter cylinder as an outer circumference and that does not contact the rod member. The piston has a stepped configuration including a small-diameter portion associated with the small-diameter cylinder and a large-diameter potion associated with the large-diameter cylinder.

A motorcycle, including method and control unit for controlling an active steering influence system, which is for actively influencing steering motions on a front wheel. A driver assistance system is for effectuating, with control instructions to components of the motorcycle, longitudinal accelerations. The driver assistance and active steering influence systems are for a signal communication with each other, e.g., via lines. The driver assistance system is for outputting, before/while outputting a control instruction, a signal instruction to the active steering influence system so that the active steering influence system, via an active modification of its state, counters a change of a movement direction, which is associated with the longitudinal acceleration to be effectuated with the control instruction. Accordingly, driving comfort or safety while riding is improve-able, in that, for example, fishtailing or wobbling motions, which are unexpected and are initiated by interventions of driver assistance system, are largely prevented.

A motorcycle, including method and control unit for controlling an active steering influence system, which is for actively influencing steering motions on a front wheel. A driver assistance system is for effectuating, with control instructions to components of the motorcycle, longitudinal accelerations. The driver assistance and active steering influence systems are for a signal communication with each other, e.g., via lines. The driver assistance system is for outputting, before/while outputting a control instruction, a signal instruction to the active steering influence system so that the active steering influence system, via an active modification of its state, counters a change of a movement direction, which is associated with the longitudinal acceleration to be effectuated with the control instruction. Accordingly, driving comfort or safety while riding is improve-able, in that, for example, fishtailing or wobbling motions, which are unexpected and are initiated by interventions of driver assistance system, are largely prevented.

A front wheel suspension device for a saddle-ride type vehicle, includes a front fork for supporting a front wheel with a steering member that is rotated about a rotational axis in accordance with operation of a handlebar. A link member is composed of an upper link rockably connected to the steering member and a lower link rockably connected to the upper link and the front fork. A swing arm includes upper and lower arms. A supporting member forms a steering axis and rockably supports front ends of the upper and lower arms. The supporting member is of a cylindrical shape, and supports the front fork on the inside in the radial direction of the supporting member such that the front fork is rotatable about the steering axis. The length of the swing arm is ensured while increasing flexibility in the layout of the swing arm.

A handlebar for a motor vehicle, in particular a motorcycle or a motorcycle-type vehicle, has a vibration damping mechanism designed to dampen a first vibration of the handlebar. The vibration damping mechanism is designed to detect the first vibration and is equipped with at least one actuator which is effectively coupled to the handlebar in a vibration-transmitting manner and which, in response to the detected first vibration, can be actuated to introduce a second vibration into the handlebar.

A straddle type vehicle comprises a steering mechanism configured to steer a front wheel a steering damper device capable of variably generating a damping force working on a rotating action of the steering mechanism; and a control unit configured to control the damping force of the steering damper device to increase, when the front wheel of the straddle type vehicle in a wheelie state lands on a ground. The control unit controls the damping force to increase, after the front wheel lands on the ground and an oscillation occurs in the steering mechanism.

A straddle type vehicle comprises a steering mechanism configured to steer a front wheel a steering damper device capable of variably generating a damping force working on a rotating action of the steering mechanism; and a control unit configured to control the damping force of the steering damper device to increase, when the front wheel of the straddle type vehicle in a wheelie state lands on a ground. The control unit controls the damping force to increase, after the front wheel lands on the ground and an oscillation occurs in the steering mechanism.

The present invention relates to a forecarriage of a rolling motor vehicle with three or four wheels, comprising: a forecarriage frame (16); at least one pair of front wheels (10, 10) kinematically connected to each other and to the forecarriage frame by a kinematic roll mechanism (20) which enables the same to roll in a synchronous and specular manner; a roll control system (100) comprising a rod (110) having a first (111) and a second end (112) opposite each other which connect by means of hinging means (101, 101; 102, 102) a first (60) and a second anchoring portion (60) of forecarriage (8) directly to each other. At least one of said first and second anchoring portions is subject to roll movements of said two front wheels. The hinging means are configured to passively follow the movements of the two anchoring portions. The hinging means (101, 101) at the first end of the rod comprise at least a first roll hinge (101) which has its hinge axis substantially orthogonal to a rolling plane of the two front wheels and is connected to the first anchoring portion. The roll control system comprises a first damper device suitable to dampenin a predetermined angular rangethe rotation movements of the rod with respect to the first roll hinge at the first end (111). The above angular range corresponds to the angular roll range of the rod.

The present invention relates to a forecarriage of a rolling motor vehicle with three or four wheels, comprising: a forecarriage frame (16); at least one pair of front wheels (10, 10) kinematically connected to each other and to the forecarriage frame by a kinematic roll mechanism (20) which enables the same to roll in a synchronous and specular manner; a roll control system (100) comprising a rod (110) having a first (111) and a second end (112) opposite each other which connect by means of hinging means (101, 101; 102, 102) a first (60) and a second anchoring portion (60) of forecarriage (8) directly to each other. At least one of said first and second anchoring portions is subject to roll movements of said two front wheels. The hinging means are configured to passively follow the movements of the two anchoring portions. The hinging means (101, 101) at the first end of the rod comprise at least a first roll hinge (101) which has its hinge axis substantially orthogonal to a rolling plane of the two front wheels and is connected to the first anchoring portion. The roll control system comprises a first damper device suitable to dampenin a predetermined angular rangethe rotation movements of the rod with respect to the first roll hinge at the first end (111). The above angular range corresponds to the angular roll range of the rod.

A tricycle may be operable between a first mode of operation steerable by a tricycle rider, and a second mode of operation steerable by an individual pushing the tricycle. A rider handle, in the first mode, may be configured to be rotationally coupled with the stem in a manner permitting a tricycle rider to exert forces on the rider handle and thereby turn the fork, and the rider handle in the second mode, being configured to be rotationally uncoupled from the stem, preventing forces on the rider handle from turning the fork. At least one rotation restricted may be included for preventing the front wheel from turning to a position where the front wheel axis leads the fork axis, and for maintaining the front wheel axis in a position trailing the fork axis both when the tricycle is propelled by a tricycle rider in the first mode and when the tricycle is pushed from behind in the second mode.