Abstract: The invention relates to a drivetrain, in particular a motor vehicle drivetrain, comprising: an engine; a gearbox comprising a main output and at least one auxiliary output; a hydrodynamic machine disposed at the auxiliary output on the gearbox output side; the hydrodynamic machine comprises a housing, stator vanes, and a rotor blade wheel; the rotor blade wheel can be driven by an input shaft; the input shaft is the output shaft of the auxiliary output or a shaft coaxially connected thereto.

Abstract: A drive unit for a motor vehicle with a cooling system is provided. The drive unit has a hydrodynamic retarder with a rotor vane wheel and a stator vane wheel. The hydrodynamic retarder is arranged in the vehicle cooling circuit and the working medium of the retarder is also the vehicle cooling medium. The retarder can empty a residual liquid quantity against the outside pressure created by the cooling system.

Abstract: The invention relates to a drive unit, comprising an internal combustion engine with a crankshaft; an exhaust line; an exhaust gas turbine which is acted on by the exhaust gas line, which is arranged downstream of the internal combustion engine and has the purpose of transmitting a positive torque to the crankshaft in the traction mode; a hydrodynamic unit which is arranged downstream of the exhaust gas turbine and has two turbine blades which form a torus-shaped working chamber; the hydrodynamic unit has a drive connection to the drive train; and a parking brake is provided for securing the primary turbine wheel of the exhaust gas turbine.

Abstract: The invention relates to a drive unit, comprising an internal combustion engine with a crankshaft; an exhaust line; an exhaust gas turbine which is acted on by the exhaust gas line, which is arranged downstream of the internal combustion engine and has the purpose of transmitting a positive torque to the crankshaft in the traction mode; a hydrodynamic unit which is arranged downstream of the exhaust gas turbine and has two turbine blades which form a torus-shaped working chamber; the hydrodynamic unit has a drive connection to the drive train; and a parking brake is provided for securing the primary turbine wheel of the exhaust gas turbine.

Abstract: The invention relates to a hydrodynamic machine for transmitting torque. Said machine is equipped with the following features: a rotor-blade wheel (2); a stator-blade wheel (3); when viewed in a cylindrical cut, the blades (2.1, 3.1) are embodied and disposed as follows: they extend in planes which are inclined towards the axis (1.1) of the machine; they are substantially aligned relative to one another; they are angled with the purpose of forming a tip (2.6, 3.6). In order to reduce losses due to shock and to enhance efficiency, at least the flow areas of the edge of the blades are angled on both sides, when viewed in a cylindrical cut, so that the tip is located between the lateral limiting surfaces (2.3, 2.4. 3.3, 3.4) of the corresponding blade.

Abstract: A drive unit includes a motor, a hydrodynamic retarder, at least one pump, at least one feed line for feeding operating medium to the retarder, and at least one bypass line which conveys operating medium past the retarder. A device for directing the flow of operating medium is arranged upstream of the retarder in the direction of flow. The device can feed the operating medium through the retarder via the feed line, feed the operating medium past the retarder via a bypass line, or divide the total flow of operating medium into at least two predetermined parts. A first predetermined part of the operating medium is fed through the retarder via the feed line. A second predetermined part of the operating medium is conveyed past the retarder via the bypass line.

Abstract: A drive unit includes a motor, a hydrodynamic retarder, at least one pump, at least one feed line for feeding operating medium to the retarder, and at least one bypass line which conveys operating medium past the retarder. A device for directing the flow of operating medium is arranged upstream of the retarder in the direction of flow. The device can feed the operating medium through the retarder via the feed line, feed the operating medium past the retarder via a bypass line, or divide the total flow of operating medium into at least two predetermined parts. A first predetermined part of the operating medium is fed through the retarder via the feed line. A second predetermined part of the operating medium is conveyed past the retarder via the bypass line.

Abstract: A regulating device is for a primary braking system in the drive train of a vehicle, especially a primary retarder in a vehicle. The device includes at least one control/regulator unit, a device for detecting gear shifts transmitting at least one measuring signal, and at least one actuator enabling the braking moment of the primary braking system to be adjusted. The regulating device is characterized in that the at least one control/regulator unit controls the at least one actuator in order to adjust the braking moment of the primary braking system according to the measuring signal or measuring signals in such a way that the braking moment of the primary brake is reduced for the entire duration of a gear shift.

Abstract: A drive unit includes a hydrodynamic retarder having a rotor paddle wheel, a stator paddle wheel, and a housing surrounding the rotor and stator wheels. The unit includes a coolant cycle system for an internal combustion engine, the coolant for this coolant cycle also being a working medium of the retarder. The drive unit further includes a working medium container for the coolant which is connected to the coolant cycle system. A connecting pipe is disposed between the working medium container and a hydrodynamic center of the retarder. A valve is disposed in the connecting pipe.

Abstract: A braking system, particularly for use in a motor vehicle includes a hydrodynamic retarder having a stator blade wheel and a rotor blade wheel. A line system through which flows a working fluid of the retarder includes the retarder as well as a cooler. The retarder further includes an inlet throttle and/or an outlet throttle. Measures are taken to keep the braking momentum of the retarder below the full value during the turning on of the retarder.

Abstract: A system for regulating a retarder, in particular a primary retarder in a vehicle, includes at least one control-regulator unit, a device for picking up measuring signals in order to detect gear speed settings, and at least one actuator for setting the retarder braking movement. The regulating system is characterized in that, on the basis of the measuring signals for detecting gear changes, the at least one control-regulator unit controls the at least one actuator for setting the retarder braking moment, such that the braking moment of the retarder does not exceed the maximum permissible braking moment (M.sub.maxR or M.sub.maxHA) for a given driving speed.

Abstract: A drive unit having an engine comprising at least one engine output shaft, a transmission following the engine and a coolant circuit with at least one water pump. The water pump is arranged behind the engine viewed in the direction of force flow. The drive unit may also include a hydrodynamic retarder having a stator and a rotor.

Abstract: A drive unit for a motor vehicle having an engine; a transmission featuring a transmission housing; and a retarder featuring a rotor and a stator. A retarder shaft is provided that is supported by two bearings which are offset along the axial length of the retarder shaft. At least one of the bearings ("outside bearing") is supported by a wall ("outside wall") of the transmission housing. The retarder shaft protrudes freely beyond the outside wall of the transmission housing. Disposed on the retarder shaft, outside the outer bearing, on the outside wall, is a sealing component. The sealing component seals the clearance between the retarder (or pinion) shaft and the outside wall, preventing passage therethrough of the transmission oil and the operating medium of the retarder.

Abstract: A drive unit for a vehicle which includes an engine, transmission and hydrodynamic retarder having a rotor and a stator. A retarder shaft is rotatably supported by two bearings and extends through the housing of the transmission. A sealing element provides a seal between the retarder shaft and the transmission housing for separating the operating medium of the hydrodynamic retarder from either the transmission lubricant or the lubricant for one of the two shaft bearings.

Abstract: A drive unit for a motor vehicle including an internal combustion engine, a transmission and a hydrodynamic retarder. The retarder includes both a rotor and a stator wherein the rotor is mounted on the engine crankshaft or crankshaft journal and the stator is disposed between the crankcase and rotor.

Abstract: The invention relates to a drive unit for a motor vehicle having a hydrodynamic retarder and a drive train with an engine and a transmission. The hydrodynamic retarder is comprised of a rotor impeller wheel and a stator impeller wheel and is coordinated with the main drive train in a manner such that the rotor impeller wheel of the hydrodynamic retarder is driven by the drive train. The operating fluid of the hydrodynamic retarder is a medium used for cooling the vehicle and a clutch is arranged between the drive train and the hydrodynamic retarder.

Abstract: A drive unit includes a hydrodynamic retarder having a rotor paddle wheel, a stator paddle wheel, and a housing surrounding the rotor and stator wheels. The unit includes a coolant cycle system for an internal combustion engine, the coolant for this coolant cycle also being a working medium of the retarder. The drive unit further includes a working medium container for the coolant. A first pipe connects a hydrodynamic center of the retarder to a valve. A second, leakage pipe is disposed between a working medium outlet of the retarder and the valve. A third pipe is disposed between the valve and the working medium container. The valve is designed such that in a first position, a conducting connection is established between the working medium container and the leakage pipe to provide for a pumping operation of the retarder. When the valve is in a second position, a conducting connection is established between the working medium container and the first pipe for a braking operation of the retarder.

Abstract: A drive unit includes a hydrodynamic retarder having a rotor paddle wheel, a stator paddle wheel, and a housing surrounding the rotor and stator wheels. The unit has a coolant cycle system, through which a coolant flows, the coolant also being a working medium of the retarder. The drive unit further includes a working medium container for the coolant and a pipe having a valve. The pipe is disposed between the retarder and the working medium container. The unit also has a coolant feed line to the retarder.