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Hydraulic circuit including booster pump and exhaust using vacuum

A technology of hydraulic circuit and booster pump, applied in the field of hydraulic circuit, can solve the problems of complicated circuit discharge, high cost and quality defects, etc.

Inactive Publication Date: 2018-12-28
TECHNOBOOST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The venting of this type of circuit is relatively complex and takes some time, leading to higher costs and the risk of quality defects

Method used

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  • Hydraulic circuit including booster pump and exhaust using vacuum
  • Hydraulic circuit including booster pump and exhaust using vacuum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] figure 1 A hydraulic circuit provided for towing a hybrid motor vehicle is shown, said hydraulic circuit comprising a high pressure circuit 2 arranged with a gas pressure accumulator 4 connected to an electric valve 6 .

[0028] The high-pressure circuit 2 supplies the power system 8 via a second electric valve 10 , said power system comprising a hydraulic machine 12 of the traction vehicle, which discharges fluid in a low-pressure circuit 16 . Arranged in parallel with the hydraulic motor 12 is a safety check valve 14 which allows fluid to pass only to the high-pressure circuit 2 .

[0029] The hydraulic machine 12 connected to the drive wheels can be operated as an engine to drive the vehicle by drawing fluid from the pressure accumulator 4, or as a pump to brake the vehicle and charge the accumulator to recover the energy of the vehicle. kinetic energy.

[0030] Said hydraulic circuit may, depending on the type of hybrid motor vehicle, include other elements not sh...

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PUM

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Abstract

The invention relates to a hydraulic circuit comprising equipment connected to a high-pressure circuit (2) and to a low-pressure circuit (16), and comprising a boosting system comprising a pump (20), said pump Fluid is extracted from the container (22) for supply to the low-pressure circuit, thereby maintaining a minimum pressure, characterized in that the hydraulic circuit comprises: a vacuuming member (30) that draws a vacuum on the high-pressure circuit (2); A communication check valve (32) allowing access to high pressure between the low pressure circuit (16) and the high pressure circuit (2); and a blocking part of the pump (34).

Description

technical field [0001] The invention relates to a hydraulic circuit comprising a booster pump and a discharge device, to a hybrid motor vehicle comprising such a hydraulic circuit and to a method of filling and draining the hydraulic circuit. Background technique [0002] A hydraulic circuit typically includes a pump receiving fluid from a low pressure section for pumping the low pressure fluid into the high pressure section and storing the fluid in a pressure accumulator to supply at least one receiver comprising Reply towards the low pressure section. [0003] Hydraulic circuits of the type used in industry or for different types of vehicles, especially for the traction of hydraulic hybrid motor vehicles, can comprise a low-pressure part maintained at a minimum pressure by boost means for The pump is supplied under pressure, thereby avoiding cavitation of the fluid, especially at maximum flow. [0004] A known booster system, shown in particular by document FR-A1-2978506...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K6/12F16H61/4104F16H61/4139F16H61/4174F15B21/04F15B21/00F15B21/044F15B21/047
CPCB60K6/12F15B21/005F15B21/044F16H61/4104F16H61/4139F16H61/4174F15B21/047F15B2211/212F15B2211/20569F15B2211/30505F15B2211/88F15B2211/89F15B2211/7058F15B2211/613F15B2211/8609F16H61/4096Y02T10/62
Inventor A·勒德朗F·罗伊
Owner TECHNOBOOST