A mobile power station for the purpose of recharging electric vehicles is provided. The charging station includes separate, but different, types of electrical generation capabilities. For example, the charging station may include two or more of: wind power, solar power and power generated from suspension mounted oscillators, which charge its battery pack over land. If desired, the mobile power station can be amphibious, as well, with the ability to navigate small and large bodies of water.

A device for supplying hydraulic energy in a chassis system of a vehicle, including a first and a second motor-pump unit which are mechanically firmly connected to each other, the two motor-pump units preferably being designed identical in structure.

A suspension mechanism has a tube member that is movably attached to an attachment shaft, a first attachment shaft retaining member provided on the chassis to swingably retain the attachment shaft with an outer peripheral surface of the tube member abutted on its inside surface, a shaft lower end portion of slip surface shape provided at lowermost part of the attachment shaft, a second attachment shaft retaining member provided on the chassis below the first attachment shaft retaining member and having a vertex equivalent section and a curve equivalent section to retain the attachment shaft with the slip surface shape shaft lower end portion abutted onto the vertex or curve equivalent section. The curve equivalent section is defined as a portion of a vertical cross section that passes through the vertex equivalent section is formed in an arc shape.

A boat includes: a hull; a float that supports the hull; a suspension that is disposed between the hull and the float and absorbs vibration transmitted from the float to the hull; a sensor that detects an interval between the hull and the float in a vertical direction; a control unit that generates a control signal in accordance with the interval; a battery that is charged or discharged in accordance with the control signal; and a motor that generates electric power by utilizing relative movement between the hull and the float in the vertical direction, charges the battery with the generated electric power in accordance with the control signal, and drives the suspension using the electric power discharged from the battery in accordance with the control signal.

A mobile power station for the purpose of recharging electric vehicles is provided. The charging station includes separate, but different, types of electrical generation capabilities. For example, the charging station may include two or more of: wind power, solar power and power generated from suspension mounted oscillators, which charge its battery pack over land. If desired, the mobile power station can be amphibious, as well, with the ability to navigate small and large bodies of water.

A height-adjustable spring arrangement for a vehicle includes a bearing spring, a first limiting cylinder with a first limiting cylinder pot and a first limiting piston, a second limiting cylinder with a second limiting cylinder pot and a second limiting piston, and a guide cylinder with a guide cylinder pot, a displaceable guide piston in the guide cylinder pot and a guide piston rod fixed on the guide piston and extending out of the guide cylinder pot along a longitudinal axis of a bearing spring and through the bearing spring. The guide piston rod is displaceable by the first and second limiting cylinders such that a spring preload acting on the bearing spring and a negative spring path of the bearing spring remain constant as a result of a height adjustment.

A snowmobile including a chassis including a tunnel; a motor; at least one ski; an endless drive track; a rear suspension assembly including: a front suspension arm; a rear suspension arm; a pair of slide rails; a first rear shock absorber connected between the front suspension arm and the slide rails; and a second rear shock absorber connected between the rear suspension arm and the front suspension arm or the slide rails; at least one sensor for sensing an angular position of the front suspension arm or the rear suspension arm relative to one of the tunnel and a component of the rear suspension assembly near at least one of the front suspension arm and the rear suspension arm; and a controller communicatively connected to the sensor to receive electronic signals therefrom representative of the angular position.

A snowmobile has a rear suspension assembly including front and rear suspension arms, first and second rear shock absorbers, a first sensor for sensing an angular position of the front suspension arm, a second sensor for sensing an angular position of the rear suspension arm, and a controller communicatively connected to the first and second sensors. A method of controlling the rear suspension assembly includes: sensing an angular position and/or an angular velocity of the front suspension arm; sensing an angular position and/or an angular velocity of a rear suspension arm; and determining a stroke and/or a piston velocity of the first rear shock absorber and/or the second rear shock absorber based on the angular position and the angular velocity of the front and rear suspension arms as sensed by the first and second sensors respectively.

A shock absorber for a vehicle may include a flow path provided in a rod valve to allow an oil film to be formed between a cylinder and the rod valve during relative movements of a strut rod and the cylinder, and the oil film is used to prevent friction from occurring between the cylinder and the rod valve during steering.

A height-adjustable spring arrangement for a vehicle includes a bearing spring, a first limiting cylinder with a first limiting cylinder pot and a first limiting piston, a second limiting cylinder with a second limiting cylinder pot and a second limiting piston, and a guide cylinder with a guide cylinder pot, a displaceable guide piston in the guide cylinder pot and a guide piston rod fixed on the guide piston and extending out of the guide cylinder pot along a longitudinal axis of a bearing spring and through the bearing spring. The guide piston rod is displaceable by the first and second limiting cylinders such that a spring preload acting on the bearing spring and a negative spring path of the bearing spring remain constant as a result of a height adjustment.