A brake controller according to the present disclosure that changes an effect correlation value correlating to an effect of braking in a first braking system provided in a vehicle in accordance with a vehicle condition of the vehicle includes a control part generating a braking force by at least one of the first braking system and a second braking system different from the first braking system in a case where the vehicle condition is a first condition based on a braking distribution ratio different from that in a case where the vehicle condition is a second condition and a setting part setting the effect correlation values so as to be different from each other in the case where the vehicle condition is the first condition and in the case where the vehicle condition is the second condition.

A power transmission device has a reverse torque converter and a planetary gear mechanism with a ring gear, sun wheel and planet carrier with several planets. An input is connected to an impeller of the reverse torque converter and to a first element of the planetary gear mechanism. A turbine wheel is connected to a second element of the planetary gear mechanism, and a third element of the planetary gear mechanism is connected to or forms an output of the power transmission device. A selectable control clutch transmits power in a first rotation speed range, with an emptied reverse torque converter, between the input and the output of the power transmission device. A device supports and/or fixes the second element of the planetary gear mechanism, in particular the connection between the turbine wheel and the second element of the planetary gear mechanism in this first rotation speed range.

A hydrodynamic retarder system for a vehicle is provided. In a first operational state with the vehicle powered on and a retarder deactivated, a pump directs fluid flow from a fluid sump to a retarder inlet valve in the closed position and directs fluid flow to a second sump. In a second operational state with the vehicle on and the retarder activated, the retarder inlet valve moves to the open position directing fluid flow into a retarder chamber and flowing out of the retarder chamber after filling a second volume and discharging to the second sump.

A hydrodynamic retarder system for a vehicle is provided. In a first operational state with the vehicle powered on and a retarder deactivated, a pump directs fluid flow from a fluid sump to a retarder inlet valve in the closed position and directs fluid flow to a second sump. In a second operational state with the vehicle on and the retarder activated, the retarder inlet valve moves to the open position directing fluid flow into a retarder chamber and flowing out of the retarder chamber after filling a second volume and discharging to the second sump.

A vehicle computer system controls downhill speed of a vehicle having a cruise control system and an engine retarder system. The system receives a request to increase engine retarder demand. In response, the system increases an engine retarder demand setting and, if cruise control is active, decreases a downhill speed control (DSC) cruise control offset. The engine retarder system may automatically activate to reduce the vehicle speed to a cruise control set speed plus the DSC cruise control offset. In an embodiment, the request to increase engine retarder demand is generated in response to operator input via an engine retarder demand input device (e.g., a steering-column-mounted control stalk). The system may also receive a request to decrease engine retarder demand in the engine retarder system of the vehicle. In response, the system decreases the engine retarder demand setting and, if cruise control is active, increases the DSC cruise control offset.

A hydrodynamic machine comprising: a toroidal working chamber including a first bladed wheel and a second bladed wheel arranged concentrically with the first bladed wheel; and an electrohydraulic system including an open loop unit and a and closed loop control unit, a working medium accumulator, a pump operable to pump a working medium from the working medium accumulator into the toroidal working chamber, a heat exchanger, a valve operable to switch between a first position, the first position being a non-braking position, and a second position, the second position being a braking position, and a line system operable to allow the pump to pump the working medium in both the first position and the second position into the working chamber.

A hydrodynamic machine comprising: a toroidal working chamber including a first bladed wheel and a second bladed wheel arranged concentrically with the first bladed wheel; and an electrohydraulic system including an open loop unit and a and closed loop control unit, a working medium accumulator, a pump operable to pump a working medium from the working medium accumulator into the toroidal working chamber, a heat exchanger, a valve operable to switch between a first position, the first position being a non-braking position, and a second position, the second position being a braking position, and a line system operable to allow the pump to pump the working medium in both the first position and the second position into the working chamber.

An electric machine comprising a rotor, a stator, and a fluid-based brake arrangement for said rotor, said fluid-based brake arrangement having a fluid circuit for transporting a brake fluid, said fluid circuit comprising a fluid channel arrangement having at least one radial fluid channel segment extending radially through a part of said rotor so as to allow for directing brake fluid from an inner radial rotor side to an outer radial rotor side, whereby, during rotation of said rotor about an axial centre axis, acceleration of brake fluid in said at least one radial fluid channel segment causes a reaction force exerting a braking torque on the rotor.

An electric machine comprising a rotor, a stator, and a fluid-based brake arrangement for said rotor, said fluid-based brake arrangement having a fluid circuit for transporting a brake fluid, said fluid circuit comprising a fluid channel arrangement having at least one radial fluid channel segment extending radially through a part of said rotor so as to allow for directing brake fluid from an inner radial rotor side to an outer radial rotor side, whereby, during rotation of said rotor about an axial centre axis, acceleration of brake fluid in said at least one radial fluid channel segment causes a reaction force exerting a braking torque on the rotor.

A clutched device can include a differential, a clutch, and a gate. The differential can transmit torque between an input member and first and second output members. A housing can define a sump and a reservoir spaced apart from the sump. A first aperture open to the sump and reservoir can be above a static fluid level of the sump. A second aperture can couple the sump and reservoir below the static fluid level. An outer clutch plate carrier can rotate through the sump and sling fluid through the first aperture. The outer carrier can be coupled for rotation with the second output member and an inner clutch plate carrier can be coupled to a third output member. The gate can be movable between first and second positions. In the first position the gate can block the second aperture. In the second position the second aperture can be open.