摘要:
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.
摘要:
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.
摘要:
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.
摘要:
The present invention involves a drive unit, specifically a drive unit for a motor vehicle having an internal combustion engine, a cooling system with fan and a hydrodynamic retarder with a stator, rotor and housing. The retarder is located within a space bounded on one side by the front of the crankcase, on a second side by the fan shaft which runs parallel to the engine shaft, and on a third side by the rear edge of the fan wheel. Viewed from the front, the retarder is substantially located within the fly circle of the fan wheel whereby the air flow generated by the fan wheel removes heat, generated by braking actions, from the housing of the retarder.
摘要:
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.
摘要:
The present invention involves a drive unit, specifically a drive unit for a motor vehicle having an internal combustion engine, a cooling system with fan, a transmission and a hydrodynamic retarder with a stator, rotor and housing. The retarder rotor is mounted on either the engine shaft or a crankshaft journal which is coaxial with the engine shaft. The retarder is located within a space bounded on one side by the front of the crankcase, on a second side by the fan shaft which runs parallel to the engine shaft, and on a third side by the rear edge of the fan wheel. Viewed from the front, the retarder is substantially located within the fly circle of the fan wheel whereby the air flow generated by the fan wheel removes heat, generated by braking actions, from the housing of the retarder.
摘要:
A hydrodynamic brake includes a housing adapted to be filled with a working fluid and to discharge the fluid, a rotor having a plurality of blades, and a stator having a plurality of blades. The number of rotor blades is about 1.2 times to about 1.5 times greater than the number of stator blades.
摘要:
The invention concerns a hydrodynamic retarder, the stator blade wheel of which can be brought into eccentric, nonaligned positions with respect to the rotor blade wheel. Either by formation of a blade free circumferential region in the blading of the stator blade wheel together with a longitudinal guide for eccentric shifting or by eccentric swingable mounting of the stator blade wheel, a directly proportional force is obtained from the corresponding braking torque in the stator blade wheel. This force represents a measure for the braking torque and serves as a characteristic value for a torque adjustment. This creates a simple control device with characteristic curves which requires a smaller retarder profile diameter in order to obtain given operating points. The advantage is the reduction of the outside dimensions, the weight and the expense for regulating the brake torque.
摘要:
A method for regulating a compressed air supply system of a motor vehicle, the system having a driving engine for driving the motor vehicle, which can be switched via a switchable hydrodynamic coupling to a driven connection with an air compressor, so that the air compressor feeds a compressed air system via an air delivery side.
摘要:
The invention relates to a method for control of a pressurised air supply system for a motor vehicle (10), said system comprising a drive motor (1) for driving the motor vehicle, which drives an air compressor (3) by means of a drive connection (2), or said drive connection for driving the air compressor may be switched on. Said method comprises the following method steps: in a supply condition, the air compressor is driven by the drive motor and connected with the air supply side (3.1) thereof to a compressed air system (5) of the motor vehicle (10), such that compressed air is supplied to the compressed air system, in a non-supply condition, the air compressor is not driven and/or is not connected to the compressed air system, whereby the switching of the supply or non-supply condition is carried out on the basis of a comparison of at least one switch pressure value with a pressure (25) in the compressed air system (5) and the topography of the stretch of road (11) on which the motor vehicle (10) is travelling is recorded, said topography includes the profile of the path (12) which the vehicle (10) must cover within a directly following period of time and/or path distance to a given destination. At least one switch pressure value (20,30) is fixed on the basis of the determined topography.