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Speed retarder of proportional valve control pump type medium and low power vehicle

A technology of small and medium power, proportional valve, applied in the direction of brake type, hydraulic brake, mechanical equipment, etc., can solve the problems of high manufacturing and installation cost, unfavorable programmed control of retarder, etc.

Inactive Publication Date: 2009-10-28
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a proportional valve-controlled pump type retarder for medium and small power vehicles to solve the problems that the existing retarder is not conducive to programmed control and high manufacturing and installation costs.

Method used

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  • Speed retarder of proportional valve control pump type medium and low power vehicle
  • Speed retarder of proportional valve control pump type medium and low power vehicle

Examples

Experimental program
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Effect test

Embodiment Construction

[0012] Such as figure 1 As shown, a proportional valve-controlled pump type retarder for medium and small power vehicles, a hydraulic pump driving gear 3, a hydraulic pump 5, the inlet of the hydraulic pump 5 is connected to the fuel tank 4, the rotor of the hydraulic pump 5 is connected to the hydraulic pump driving gear 3-axis mechanical connection; a proportional relief valve 7, the proportional relief valve 7 is electrically connected to the ECU, and connected to the outlet of the hydraulic pump 5 and the heat exchanger 8 through a hydraulic pipeline; the hydraulic pump 5 is a displacement of 250ml / r high-pressure hydraulic pump; proportional relief valve 7 is a high-pressure proportional relief valve with a pressure regulating range of 0-40MPa; hydraulic pump 5, proportional relief valve 7 and heat exchanger 8 are arranged in series, with hydraulic oil passages in between .

[0013] Such as figure 2 As shown, the present invention utilizes a hydraulic pump drive gear ...

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PUM

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Abstract

The invention discloses a speed retarder of a proportional valve control pump type medium and low power vehicle, comprising a hydraulic pump driving gear, a hydraulic pump and a proportional overflow valve; wherein an inlet of the hydraulic pump is connected with an oil tank; a rotor of the hydraulic pump is mechanically connected with a hydraulic pump driving gear shaft; and the proportional overflow valve 7 is electrically connected with an ECU and connected with an outlet of the hydraulic pump and a heat exchanger by a hydraulic pipeline. The speed retarder has the beneficial effects that 1. the heat generated by energy loss can be taken away by the hydraulic oil while the vehicle is auxiliarily braked by the speed retarder; 2. the speed retarder is easy to be controlled by a computer so as to provide a stable and accurate braking torque; 3. wear is basically not generated and the service life is long; and 4. power source is not needed and the structure is simple.

Description

technical field [0001] The invention relates to a retarder for vehicles, especially a retarder for medium and small power vehicles with a braking power below 350 kilowatts. Background technique [0002] When the vehicle goes downhill, it is often necessary to use the service brake continuously or frequently, resulting in severe wear of the brake drum and brake pads, and even cracking of the brake drum and burning of the brake pads due to heat, which not only reduces the service life of the service brake, Increased operating costs, serious threats to driving safety. Installing a retarder can make a vehicle with a large mass decelerate smoothly without consuming the braking system, which is an effective way to solve the above problems, especially medium and large vehicles are basically equipped with this auxiliary braking device. At present, known retarders can be divided into two types in terms of structure: electromagnetic retarders and hydraulic retarders. Among them, the...

Claims

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Application Information

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IPC IPC(8): B60T10/02
Inventor 刘金刚张高峰谭援强杨世平
Owner XIANGTAN UNIV
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