Pump control type hydraulic retarding system and control method thereof

A technology of hydraulic retarder and hydraulic retarder, which is applied in the field of vehicles, can solve the problems of inability to control the oil flow rate very accurately and poor control accuracy of oil pump displacement, and achieve correcting control errors, improving control accuracy, and high Controlling the Effects of Response Speed

Inactive Publication Date: 2016-04-20
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The compressible / expandable characteristics of high-pressure air and the poor displacement control accuracy of the oil pump make it impossible for the oil supply device of the existing hydraulic retarder system to control the oil flow very accurately when supplying oil to the hydraulic retarder

Method used

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  • Pump control type hydraulic retarding system and control method thereof
  • Pump control type hydraulic retarding system and control method thereof
  • Pump control type hydraulic retarding system and control method thereof

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] Explanation of terms:

[0032] target speed v 0, refers to the expected vehicle speed set by the driver when the vehicle is going downhill.

[0033] The preset speed deviation Va refers to the speed value pre-stored in the controller 40 by the manufacturer before the vehicle leaves the factory. v 2 for comparison.

[0034] refer to Figure 1 to Figure 3 , The present invention provides a hydraulic retarding system, in particular a pump-...

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Abstract

The invention relates to a pump control type hydraulic retarding system and a control method thereof. The pump control type hydraulic retarding system comprises a hydraulic retarder, a rotating speed sensor, an oil tank, a controller, a servo motor, a main pump and an auxiliary pump; the rotating speed sensor is mounted on a transmission shaft of a vehicle; the servo motor is connected to the main pump; and a rotating shaft of the auxiliary pump is connected to a rotating shaft of the hydraulic retarder. An oil outlet of the main pump and an oil outlet of the auxiliary pump are both connected to an oil inlet of the hydraulic retarder; an oil inlet of the main pump is connected to an oil outlet of the hydraulic retarder and connected to the oil tank; and an oil inlet of the auxiliary pump is connected to the oil tank. The auxiliary pump and the hydraulic retarder are coaxially connected, so that the pump control type hydraulic retarding system can quickly enter the brake retarding work; and the main pump and the auxiliary pump are separatelymatched with the hydraulic retarder to provide the control with different precision levels overthe vehicle driving speed.

Description

technical field [0001] The invention belongs to the technical field of vehicles, and in particular relates to a pump-controlled hydraulic retarding system and a control method thereof. Background technique [0002] The hydraulic retarder, also known as the hydraulic retarder, is a device that uses liquid damping to produce a retarding effect. The hydraulic retarder system usually includes a hydraulic retarder, an oil supply device, a heat exchanger, etc. The hydraulic retarder system is often used in vehicles to assist in reducing the vehicle speed when the vehicle is braking. [0003] The stator of the hydraulic retarder is fixedly installed, and the rotor of the hydraulic retarder is connected with the transmission shaft of the vehicle. During the running of the vehicle, the rotor of the hydraulic retarder rotates relative to the stator. The stator and rotor of the hydraulic retarder are equipped with vanes. When the vehicle brakes, the oil supply device fills the cavity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/02F15B11/17
Inventor 刘毅齐宇俞育堃龚国芳
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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