A coolant diverter system and method of controlling coolant flow are provided. The coolant diverter system includes a coolant diverter body having a coolant inlet opening, a driveline retarder outlet opening and a bypass outlet opening. The coolant diverter system also includes a valve positioned in the coolant diverter body. The valve is configured in a first valve orientation to fluidly couple the coolant inlet opening to the driveline retarder outlet opening in isolation from the bypass outlet opening. The valve is configured in a second valve orientation to fluidly couple the coolant inlet opening to the driveline retarder outlet opening and the bypass outlet opening. The coolant diverter system also includes a valve controller configured to place the valve in the first valve orientation in response to activation of a driveline retarder coupled to the driveline retarder outlet opening for braking.

A powertrain waste heat recovery system includes a first powertrain component and a second powertrain component. The powertrain waste heat recovery system also includes a heat recovery circuit circulating a heat recovery fluid through a heat recovery heat exchanger. The heat recovery heat exchanger transfers heat from the first powertrain component to the heat recovery fluid during a powertrain propulsion mode and transfers heat from the second powertrain component to the heat recovery fluid during a powertrain retarding mode. The powertrain waste heat recovery system also includes a conversion device for converting thermal energy from the heat recovery fluid to an energy form other than thermal energy.

A powertrain waste heat recovery system includes a first powertrain component and a second powertrain component. The powertrain waste heat recovery system also includes a heat recovery circuit circulating a heat recovery fluid through a heat recovery heat exchanger. The heat recovery heat exchanger transfers heat from the first powertrain component to the heat recovery fluid during a powertrain propulsion mode and transfers heat from the second powertrain component to the heat recovery fluid during a powertrain retarding mode. The powertrain waste heat recovery system also includes a conversion device for converting thermal energy from the heat recovery fluid to an energy form other than thermal energy.

A drive device for a vehicle having a combustion engine and a multistage manual transmission having first and second sub-transmissions, each of which has a separate input shaft. A first input shaft of the first sub-transmission couples, via a first clutch, the combustion engine or is assigned an electrical machine. A second input shaft of a second sub-transmission couples, via a second clutch, the combustion engine. The first input shaft is additionally assigned a start-up element having at least one hydrodynamic transfer element, which has first and second functional wheels which together form a working chamber. The working chamber can be filled with fluid in order to generate a hydrodynamic transfer torque such that at least one start-up function, affecting the first sub-transmission, can carried out by way of the start-up element.

A drive device for a vehicle having a combustion engine and a multistage manual transmission having first and second sub-transmissions, each of which has a separate input shaft. A first input shaft of the first sub-transmission couples, via a first clutch, the combustion engine or is assigned an electrical machine. A second input shaft of a second sub-transmission couples, via a second clutch, the combustion engine. The first input shaft is additionally assigned a start-up element having at least one hydrodynamic transfer element, which has first and second functional wheels which together form a working chamber. The working chamber can be filled with fluid in order to generate a hydrodynamic transfer torque such that at least one start-up function, affecting the first sub-transmission, can carried out by way of the start-up element.

The invention relates to a braking device (10) for a motor vehicle with a fluid path (12) through which a fluid can flow and which has at least two line sections (14, 16), in which at least one pump element (18) and at least one valve device (34) which has a valve inlet (26) and a valve outlet (28) and which can be moved between at least two valve positions (30, 32) is arranged, wherein the valve device is fluidically connected to the pump element (18) via the valve inlet (26) by means of a first of the line sections (14), with a retarder (38), which has a stator (40), a rotor (42) and a retarder inlet (44), via which the retarder (38) is fluidically connected to the valve device (34) by means of the second of the line sections (16) via the valve outlet (28), wherein in a first of the valve positions (30) the valve inlet (26) is fluidically connected to the valve outlet (28) and in the second valve position (32) the valve inlet (26) is not fluidically connected to the valve outlet (28).

The invention relates to a braking device (10) for a motor vehicle with a fluid path (12) through which a fluid can flow and which has at least two line sections (14, 16), in which at least one pump element (18) and at least one valve device (34) which has a valve inlet (26) and a valve outlet (28) and which can be moved between at least two valve positions (30, 32) is arranged, wherein the valve device is fluidically connected to the pump element (18) via the valve inlet (26) by means of a first of the line sections (14), with a retarder (38), which has a stator (40), a rotor (42) and a retarder inlet (44), via which the retarder (38) is fluidically connected to the valve device (34) by means of the second of the line sections (16) via the valve outlet (28), wherein in a first of the valve positions (30) the valve inlet (26) is fluidically connected to the valve outlet (28) and in the second valve position (32) the valve inlet (26) is not fluidically connected to the valve outlet (28).

The invention relates to a braking device (10) with a fluid path (12) through which a fluid can flow and which has two line sections (14, 16), in which a pump element (18), a cooler (64) and a valve device (34) which has a valve inlet (26) and a valve outlet (28) and which can be moved between two valve positions (30, 32) is arranged, wherein the valve device is fluidically connected to the pump element (18) via the valve inlet (26) by means of a first of the line sections (14), with a hydraulic sump (80) fluidically connected to the fluid path (12), with a retarder (38), which has a stator (40), a rotor (42) and a retarder inlet (44), wherein the valve inlet (26) is fluidically connected to the valve outlet (28) in a first of the valve positions (30), whereby the fluid flowing through the first line section (14) can be conveyed through the valve device (34) to the retarder inlet (44) via the second line section (16), and the valve inlet (26) is not fluidically connected to the valve outlet (28) in the second valve position (32).

The invention relates to a braking device (10) with a fluid path (12) through which a fluid can flow and which has two line sections (14, 16), in which a pump element (18), a cooler (64) and a valve device (34) which has a valve inlet (26) and a valve outlet (28) and which can be moved between two valve positions (30, 32) is arranged, wherein the valve device is fluidically connected to the pump element (18) via the valve inlet (26) by means of a first of the line sections (14), with a hydraulic sump (80) fluidically connected to the fluid path (12), with a retarder (38), which has a stator (40), a rotor (42) and a retarder inlet (44), wherein the valve inlet (26) is fluidically connected to the valve outlet (28) in a first of the valve positions (30), whereby the fluid flowing through the first line section (14) can be conveyed through the valve device (34) to the retarder inlet (44) via the second line section (16), and the valve inlet (26) is not fluidically connected to the valve outlet (28) in the second valve position (32).

Technologies for variable retarder control include a control valve for controlling operation of a hydraulic retarder. The control valve includes a valve body having a retarder valve including multiple ports and a valve bore extending through the ports. A valve spool is located in the valve bore and movable to selectively block or connect one or more of the ports. The ports include a retarder-out port and an exhaust port, which are fluidly coupled to each other via an exhaust passageway. In use, the exhaust passageway bleeds lubrication fluid from the retarder-out port to the exhaust port as the valve spool is moved from a fully-off position to a fully-on position. The exhaust passageway is shaped so as to provide a linear relationship between the positioning of the valve spool between the fully-off and fully-on positions and the power of the hydraulic retarder. The control valve may also include a lubrication regulator valve configured to supply lubrication oil to the system while the hydraulic retarder is being bled to the exhaust port via the exhaust passageway to maintain appropriate lubrication pressures in the system.