There is provided a hydraulic system for a vehicle. The hydraulic system has a hydraulic rotary actuator assembly rotationally coupled to a road wheel of the vehicle. The hydraulic rotary actuator assembly has a first operating mode, wherein a rotation of the road wheel causes the hydraulic rotary actuator assembly to pump a fluid from a fluid supply system. The hydraulic system further has a variable restrictor assembly coupled to the hydraulic rotary actuator assembly in the vehicle. The variable restrictor assembly controls a flow of the fluid flowing from the hydraulic rotary actuator assembly, to brake the rotation of the road wheel on a ground surface. The hydraulic system further has a variable restrictor controller coupled to the variable restrictor assembly. The variable restrictor controller controls the variable restrictor assembly, so as to enable a variation of a rate of braking of the road wheel on the ground surface.

There is provided a hydraulic system for a vehicle. The hydraulic system has a hydraulic rotary actuator assembly rotationally coupled to a road wheel of the vehicle. The hydraulic rotary actuator assembly has a first operating mode, wherein a rotation of the road wheel causes the hydraulic rotary actuator assembly to pump a fluid from a fluid supply system. The hydraulic system further has a variable restrictor assembly coupled to the hydraulic rotary actuator assembly in the vehicle. The variable restrictor assembly controls a flow of the fluid flowing from the hydraulic rotary actuator assembly, to brake the rotation of the road wheel on a ground surface. The hydraulic system further has a variable restrictor controller coupled to the variable restrictor assembly. The variable restrictor controller controls the variable restrictor assembly, so as to enable a variation of a rate of braking of the road wheel on the ground surface.

A traction control system is provided for a vehicle having wheels driven on a primary axle via an engine, and wheels on a secondary axle torsionally isolated from the engine. Wheel speed sensors and brakes are provided for each wheel. A motor/hydraulic pump is operatively associated with each secondary axle wheel for selectively powering the secondary axle wheel or being regenerativly powered by the secondary axle wheel for regenerative braking. A clutch is provided to connect each secondary axle wheel with the secondary axle wheel's motor/hydraulic pump. An accumulator is provided to hydraulically power the secondary axle wheels and to accept regenerative pressure from the secondary axle wheel's motor/hydraulic pump. A wheel valve is provided for each respective secondary axle wheel for selectively connecting the secondary axle wheel's motor/hydraulic pump with the accumulator. A controller is provided to control the primary axle and secondary axle wheels. The controller commands braking and powering of the primary and secondary axle wheels during low traction events.

A traction control system is provided for a vehicle having wheels driven on a primary axle via an engine, and wheels on a secondary axle torsionally isolated from the engine. Wheel speed sensors and brakes are provided for each wheel. A motor/hydraulic pump is operatively associated with each secondary axle wheel for selectively powering the secondary axle wheel or being regenerativly powered by the secondary axle wheel for regenerative braking. A clutch is provided to connect each secondary axle wheel with the secondary axle wheel's motor/hydraulic pump. An accumulator is provided to hydraulically power the secondary axle wheels and to accept regenerative pressure from the secondary axle wheel's motor/hydraulic pump. A wheel valve is provided for each respective secondary axle wheel for selectively connecting the secondary axle wheel's motor/hydraulic pump with the accumulator. A controller is provided to control the primary axle and secondary axle wheels. The controller commands braking and powering of the primary and secondary axle wheels during low traction events.

An oil inlet of a motor communicates with a first end of an oil pump through a first passage. A first oil sump of the motor communicates with a second end of the oil pump through a second passage. When the oil pump is rotating, a port at the first end is an oil outlet of the oil pump, and a port at the second end is an oil inlet of the oil pump. The first end of the oil pump communicates with a second oil sump through a third passage with a first valve. The second end of the oil pump communicates with the second oil sump through a fourth passage with a second valve. In this way, when the oil pump is reversing, coolant may be input into a motor cavity and accumulate in the motor cavity, so as to cool motor components in an immersion manner.

An oil inlet of a motor communicates with a first end of an oil pump through a first passage. A first oil sump of the motor communicates with a second end of the oil pump through a second passage. When the oil pump is rotating, a port at the first end is an oil outlet of the oil pump, and a port at the second end is an oil inlet of the oil pump. The first end of the oil pump communicates with a second oil sump through a third passage with a first valve. The second end of the oil pump communicates with the second oil sump through a fourth passage with a second valve. In this way, when the oil pump is reversing, coolant may be input into a motor cavity and accumulate in the motor cavity, so as to cool motor components in an immersion manner.

A braking system, including a damper and a brake controller. The damper includes: a sealed gearbox including an inner chamber, at least one pair of engaged gears mated with the inner chamber of the gearbox, and a brake fluid storage box. The at least one pair of engaged gears include a driving gear. A first flowing channel and a second flowing channel are provided on both sides of the gearbox of the at least one pair of engaged gears, respectively. The first flowing channel and the second flowing channel include a first extracting outlet and a second extracting outlet, respectively, which are both disposed on the gearbox. The brake fluid storage box includes a first joint adapting to communicate with the first extracting outlet and a second joint adapting to communicate with the second extracting outlet. The brake controller includes at least one braking switch valve.

A braking system, including a damper and a brake controller. The damper includes: a sealed gearbox including an inner chamber, at least one pair of engaged gears mated with the inner chamber of the gearbox, and a brake fluid storage box. The at least one pair of engaged gears include a driving gear. A first flowing channel and a second flowing channel are provided on both sides of the gearbox of the at least one pair of engaged gears, respectively. The first flowing channel and the second flowing channel include a first extracting outlet and a second extracting outlet, respectively, which are both disposed on the gearbox. The brake fluid storage box includes a first joint adapting to communicate with the first extracting outlet and a second joint adapting to communicate with the second extracting outlet. The brake controller includes at least one braking switch valve.

A door component has a damper device with two connection units that can be moved relative to each other for damping a door movement of a door of a vehicle. The damper device contains a magnetorheological fluid, as an operating fluid, and a cylinder unit having a first chamber and a second chamber. The two chambers are separated from each other by a piston which is provided with a damping valve. The damper device has a connection which is constructed for coupling to a drive. The damper device can be moved in an active manner at least from a first position into a second position by the drive which is coupled via the connection.

The invention relates to a brake system (100) for braking a rotation shaft (1), characterised in that it comprises: at least one piston (4), actuated by means of an electric linear actuator (3), able to move between a retracted release position and a final extended braking position; a casing (6) adapted to rotate integrally with the rotation shaft, with a cavity closed by a perpendicular cover (5), provided with at least one opening in which the piston (4) is fitted, and the piston (4) having the ability to move forwards into the closed cavity and move backwards, and a filling occupying the closed cavity, rotating with the casing, consisting of a dispersion (7) or amalgam formed by a powdery or granular product with a lubricating agent.