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Method for limiting hydraulic brake with the maximum invoked break power

A technology of hydraulic brakes and braking power, which is applied in the direction of hydraulic brakes, liquid resistance brakes, brakes, etc., and can solve problems such as limiting the usability of hydraulic brakes

Inactive Publication Date: 2011-06-29
VOITH TURBO GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this undesirably limits the usability of hydraulic brakes

Method used

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  • Method for limiting hydraulic brake with the maximum invoked break power
  • Method for limiting hydraulic brake with the maximum invoked break power
  • Method for limiting hydraulic brake with the maximum invoked break power

Examples

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Embodiment Construction

[0036] A schematic diagram of the engine cooling circuit 2 of an automobile can be seen in FIG. 1. In the engine cooling circuit 2, the coolant circulates in the circuit by means of the coolant pump 4, wherein the circuit passes through the automobile radiator 5 (liquid-gas heat exchanger), in which the coolant absorbed by the coolant The heat is discharged to the surrounding environment. In addition, the coolant also flows through the automobile driving engine 3 to cool the automobile driving engine, and the coolant is the working fluid of the hydraulic brake 1 provided in the engine cooling circuit 2.

[0037] The arrangement of different components in the engine cooling circuit 2 is arbitrarily selected in Fig. 1, and different designs can be carried out.

[0038] Figure 2 to 5 You can see the graphs in the graph, they make exactly two temperature curves directly correspond to the speed n of the car driving engine. These two temperature curves are in the form of straight line...

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Abstract

The invention relates to a method for limiting the maximum adjustable braking power in a hydrodynamic brake of the vehicle. The heat generated by the hydrodynamic brake is discharged through the coolant in an engine cooling circulation return of the vehicle. The coolant is recycled in the engine cooling circulation return by a coolant pump drived by the engine of the vehicle. The method comprisesfollowing steps: presetting an adjustment interference temperature; presetting an adjustment target temperature; detecting the coolant temperature continuously or in a time interval; reducing the maximum adjustable braking power with the preset gradient if the coolant temperature ascends to the adjustment interference temperature or exceeds the adjustment interference temperature. The reduced gradient lies on the difference between the adjustment target temperature and the adjustment interference temperature. The adjustment interference temperature and the adjustment target temperature are preset based on the rotation speed of the engine of the vehicle.

Description

Technical field [0001] The present invention relates to two methods for limiting the maximum available braking power of a hydraulic brake in an automobile. If the heat generated by the hydraulic brake is discharged by the coolant in the cooling circuit of the automobile engine, and the coolant is The coolant pump driven by the car driving motor circulates in the engine cooling circuit. Background technique [0002] A hydraulic brake is also called a hydraulic retarder. During braking operation, heat is generated due to fluid friction, and this heat must be discharged from the hydraulic brake so that the hydraulic brake will not be damaged. In the automobile, the heat from the hydraulic brake is usually discharged through the engine cooling circuit, that is, the coolant in the engine cooling circuit is directly used as the working fluid of the hydraulic brake, or used to pass through the heat exchanger, It is usually a liquid-liquid heat exchanger to cool the working fluid of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T1/087B60T8/88B60T17/18
CPCF16D57/00B60T10/02B60T17/04
Inventor H・J・贝茨
Owner VOITH TURBO GMBH & CO KG
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