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Vehicle cooling circuit with retarder or fluid coupling

A technology of cooling cycle and circulation loop, applied in hydraulic brakes, brake types, mechanical equipment, etc., can solve problems such as negative efficiency

Inactive Publication Date: 2011-12-14
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the flow losses that are required anyway in normal braking operation and contribute to optimal deceleration of the vehicle have a negative effect on efficiency during pump operation, that is to say when the retarder is not used for braking.

Method used

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  • Vehicle cooling circuit with retarder or fluid coupling
  • Vehicle cooling circuit with retarder or fluid coupling
  • Vehicle cooling circuit with retarder or fluid coupling

Examples

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Embodiment Construction

[0025] exist figure 1 A schematic diagram of a vehicle cooling circuit according to the invention is shown in . The vehicle drive engine 2 , the thermostat 24 and the heat exchanger 23 are connected in this order as viewed in the flow direction of the cooling medium. Furthermore, a compensation container 22 for the working medium is provided. In the cooling circuit, the hydrodynamic retarder 3 is in this case connected parallel to the vehicle drive engine 2 , the working medium of which is at the same time the cooling medium. The cooling medium can be water, oil or an aqueous mixture. Here, the hydrodynamic retarder 3 is designed as a primary retarder, that is to say it bypasses the transmission 21 or is coupled to the primary side of the transmission 21 during braking operation so that it can be designed, for example, directly as Vehicles with a diesel engine drive the drive shaft or crankshaft of the engine 2 to decelerate. An embodiment is also conceivable as a secondar...

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PUM

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Abstract

The invention relates to a vehicle cooling circuit, in particular an engine cooling circuit, having a cooling medium circulated by a cooling medium pump in a cooling circuit; having a vehicle drive engine and / or other heat-generating assembly cooled by means of the cooling medium; having a hydrodynamic retarder, comprising a driven primary paddle wheel and a secondary paddle wheel, together forming a toroid-shaped workspace that can be filled with a working medium and from which said working medium can be withdrawn as desired in order to transfer torque hydrodynamically from said primary paddle wheel to said secondary paddle wheel; wherein said working medium of the hydrodynamic retarder is also the cooling medium of the cooling circuit; and the hydrodynamic retarder also operates as the cooling medium pump and brings about a pumping effect on the cooling medium for circulating the cooling medium in the cooling circuit. The invention is characterized by the following features: a brake or a drive running counter to the drive of the primary paddle wheel is associated with the secondary paddle wheel such that it can be fixed in a first operating condition - brake mode - or driven counter to the rotation direction of the primary paddle wheel in order to hydrodynamically brake the primary paddle wheel and, in a second operating condition - pump mode - can be partially or completely released such that it circulates at the speed of the primary paddle wheel or at a specified speed difference slower than the primary paddle wheel together with the primary paddle wheel in the same direction.

Description

technical field [0001] The invention relates to a vehicle cooling cycle circuit, especially an engine cooling cycle circuit of a truck, a car, a rail vehicle or other motor vehicles, the cooling cycle circuit has a hydraulic retarder for hydraulic braking or is used for hydraulic drive A fluid coupling for a vehicle, that is, an assembly used to tow or propel a vehicle. Background technique [0002] Cooling circuits in which hydrodynamic retarders are arranged are known. Document DE 103 46 066 A1 describes a vehicle cooling circuit comprising a cooling medium pump and a hydraulic retarder, the cooling medium is circulated by means of the cooling medium pump for cooling the internal combustion engine, wherein the working medium of the retarder is at the same time the cooling circuit cooling medium. Here, the gear unit is at the same time a coolant pump. [0003] Document DE 44 08 349 C2 describes a similar arrangement in which the retarder is also filled with working mediu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T10/02
CPCB60T10/02
Inventor 赖因哈德·克恩亨维尔纳·亚当斯
Owner VOITH PATENT GMBH
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