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Hydrodynamic retarder device, method for its use and vehicle

A deceleration device, hydraulic technology, applied in the direction of hydraulic brake transmission device, control device, vehicle components, etc., can solve problems such as adverse effects

Inactive Publication Date: 2016-09-14
SCANIA CV AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, with a hydrodynamic retarder, exposing the impeller system to the air during acceleration is problematic because the air in contact with the coolant will partially follow the coolant, adversely affecting other parts of the vehicle that the coolant contacts

Method used

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  • Hydrodynamic retarder device, method for its use and vehicle
  • Hydrodynamic retarder device, method for its use and vehicle
  • Hydrodynamic retarder device, method for its use and vehicle

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Embodiment Construction

[0041] figure 1 The commercial vehicle 1 shown is of this type comprising an engine 2 , a drive train 3 and a reduction gear 4 which can be connected and disconnected.

[0042] The basic structure of the reduction gear 4 is passed figure 2 with 3 It is shown in which the clutch device 5 is arranged for connecting and disconnecting the reduction device 4 to and from the vehicle driveline 3 . The reduction gear 4 has a stator 7 and a rotor 8 that rotates around a shaft R. As shown in FIG.

[0043] The stator 7 and the rotor 8 together form an impeller system with a working space 6, in which more or less fluid is designed to agitate as a working medium when the reduction gear operates, so that the energy absorbed by the reduction gear is converted into heat. This heat is cooled by the vehicle's conventional cooling system comprising a cooling circuit 9 , a water pump 10 , a front cooler 11 , an expansion tank 21 and a thermostat 12 .

[0044] Directional valves 13 inserted i...

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Abstract

A hydrodynamic retarder device (4) for installation in a power-train (3) in a vehicle (1), wherein the retarder device comprises: a shovel-equipped stator (7) which, together with a shovel-equipped rotor (8), forms a shovel system with a workspace (6) for receipt of an aqueous working medium, and a retarder circuit (14) connected to the workspace (6), to control the inflow of a working medium to the workspace (6), wherein the retarder circuit (14) is installed to be connected to the vehicle's ordinary cooling water circuit (9). The retarder circuit (14) comprises valve elements to shut off the flow of working medium to the workspace (6), and a negative pressure generator (19) is connected in the retarder circuit (14), which negative pressure generator is installed to reduce the pressure in the workspace (6) to or below the vapour pressure for the working medium, so that the workspace is thus evacuated of the liquid working medium. The invention also relates to a method and a vehicle.

Description

technical field [0001] The invention relates to a hydraulic retarder for vehicles comprising at least one stator equipped with spades to form, together with at least one rotor equipped with spades, an impeller system with a working space for receiving Fluid working medium; the hydraulic deceleration device also includes a brake circuit connected to the working space to control the supply of working medium to the working space. The invention also relates to a method for operating a hydraulic brake, and a vehicle equipped with a hydraulic brake. Background technique [0002] In order to improve driving efficiency and safety, and reduce the wear and tear of wheel brakes, according to the prior art, most heavy goods vehicles are equipped with speed reducers. The reducer is a hydraulic auxiliary brake, which brakes the power transmission system of the vehicle under the resistance generated by operating a certain amount of liquid in the working space through the impeller system. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T10/02B60T1/087
CPCF16D57/04B60T10/02B60K17/02B60T11/28B60T1/087B60W10/196B60T1/02
Inventor M·松内留斯J·费尔姆P·里巴克
Owner SCANIA CV AB