CN113002504A - Hydraulic retarder control device and control method based on switch type electromagnetic valve - Google Patents

Hydraulic retarder control device and control method based on switch type electromagnetic valve Download PDF

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Publication number
CN113002504A
CN113002504A CN202110468991.6A CN202110468991A CN113002504A CN 113002504 A CN113002504 A CN 113002504A CN 202110468991 A CN202110468991 A CN 202110468991A CN 113002504 A CN113002504 A CN 113002504A
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CN
China
Prior art keywords
valve
control
retarder
air
solenoid valve
Prior art date
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Pending
Application number
CN202110468991.6A
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Chinese (zh)
Inventor
张军
万里恩
陈宇超
马明武
李法兵
曲健刚
刘明明
乔艳辉
和光宇
贾玮琦
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FAW Jiefang Automotive Co Ltd
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FAW Jiefang Automotive Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FAW Jiefang Automotive Co Ltd filed Critical FAW Jiefang Automotive Co Ltd
Priority to CN202110468991.6A priority Critical patent/CN113002504A/en
Publication of CN113002504A publication Critical patent/CN113002504A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T10/00Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope

Abstract

The invention belongs to the technical field of control of a hydraulic retarder of a commercial vehicle, and discloses a hydraulic retarder control device and a control method based on a switch type electromagnetic valve, wherein the hydraulic retarder control device based on the switch type electromagnetic valve comprises a pressure limiting valve, a relay valve, an air inlet electromagnetic valve and an air outlet electromagnetic valve, wherein the inlet of the pressure limiting valve is connected with an air source, the air inlet of the relay valve is fluidly connected with the outlet of the pressure limiting valve through a first air pipeline, the air outlet of the relay valve is fluidly connected with the hydraulic retarder, and the air inlet electromagnetic valve is fluidly connected with the outlet of the pressure limiting valve through a second air; the exhaust electromagnetic valve is fluidly connected between the air outlet of the air inlet electromagnetic valve and the control piston upper cavity of the relay valve; the air inlet electromagnetic valve and the air outlet electromagnetic valve are both switch type electromagnetic valves. The relay valve is controlled by two switch type electromagnetic valves, so that the pressure of compressed gas can be accurately controlled, and the relay valve has the advantages of quick response and low cost.

Description

Hydraulic retarder control device and control method based on switch type electromagnetic valve
Technical Field
The invention relates to the technical field of control of a hydraulic retarder of a commercial vehicle, in particular to a control device and a control method of the hydraulic retarder based on a switch type electromagnetic valve.
Background
At present, most of hydraulic retarders push hydraulic oil into working cavities of stators and rotors in the hydraulic retarders through compressed gas to realize a retarding function. The valve body for controlling the compressed gas to enter the hydraulic retarder mostly adopts an integrated proportional electromagnetic valve, and has the problems of high cost and poor vibration resistance.
Disclosure of Invention
The invention aims to provide a hydraulic retarder control device and a hydraulic retarder control method based on a switch type electromagnetic valve, and aims to solve the problems of high control cost and poor vibration resistance of compressed gas in a hydraulic retarder.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hydraulic retarder control device based on a switch type electromagnetic valve comprises:
the inlet of the pressure limiting valve is connected with an air source;
the air inlet of the relay valve is fluidly connected to the outlet of the pressure limiting valve through a first air pipeline, and the air outlet of the relay valve is fluidly connected to the hydraulic retarder to provide compressed air for the hydraulic retarder;
an inlet solenoid valve fluidly connected to the outlet of the pressure limiting valve via a second gas line;
an exhaust solenoid valve fluidly connected between an outlet of the intake solenoid valve and a control piston upper chamber of the relay valve;
the air inlet electromagnetic valve and the air outlet electromagnetic valve are both switch type electromagnetic valves.
Optionally, the on-off solenoid valve-based hydraulic retarder control device further comprises a pressure sensor, and the pressure sensor is arranged between the relay valve and the hydraulic retarder.
Optionally, the hydraulic retarder control device based on the switch-type electromagnetic valve further includes a retarder controller, and the air inlet electromagnetic valve, the air outlet electromagnetic valve, and the pressure sensor are electrically connected to the retarder controller respectively.
Optionally, the pressure sensor is an air pressure sensor.
Optionally, the hydraulic retarder control device based on the switch-type electromagnetic valve further comprises a control handle, and the control handle is connected with the retarder controller to send a gear instruction to the retarder controller.
Optionally, the hydraulic retarder control device based on the switch type electromagnetic valve further comprises an air cylinder, and compressed air is stored in the air cylinder and serves as an air source of the hydraulic retarder.
Optionally, the intake solenoid valve and the exhaust solenoid valve are both high-speed switching solenoid valves, and the operating frequency of the high-speed switching solenoid valves is 300 HZ.
The invention also provides a hydraulic retarder control method based on the switch type electromagnetic valve, which comprises the following steps:
s1, compressed gas from a gas source reaches an air inlet solenoid valve through a pressure limiting valve and waits for a control instruction;
s2, when the air inlet solenoid valve acts, compressed air enters a control piston upper cavity of the relay valve through the air inlet solenoid valve and the air outlet solenoid valve, the relay valve is controlled to open a valve port to output the compressed air to a hydraulic retarder, and the hydraulic retarder works;
when exhaust is needed, the exhaust electromagnetic valve is electrified to discharge compressed gas in the upper cavity of the control piston, the relay valve is controlled to close a valve port, and the compressed gas in the hydraulic retarder is discharged through the relay valve and the exhaust electromagnetic valve.
Optionally, the air inlet solenoid valve and the air outlet solenoid valve are respectively electrically connected with a retarder controller, and the retarder controller adjusts and controls the power-on time of the air inlet solenoid valve and the air outlet solenoid valve according to the target pressure of the hydraulic retarder.
Optionally, the retarder controller collects an inlet pressure of the hydraulic retarder through a pressure sensor, and adjusts and controls the energization time of the intake solenoid valve and the exhaust solenoid valve according to a difference between the inlet pressure and the target pressure.
The invention has the beneficial effects that:
according to the hydraulic retarder control device based on the switch type electromagnetic valve, the relay valve is controlled by the two switch type electromagnetic valves (the air inlet electromagnetic valve and the air outlet electromagnetic valve) so as to realize accurate control of the pressure of compressed gas, and compared with a scheme that a proportional type electromagnetic valve is adopted in the prior art, the hydraulic retarder control device based on the switch type electromagnetic valve has the advantages of being fast in response and low in cost.
According to the control method of the hydraulic retarder based on the switch type electromagnetic valves, the two switch type electromagnetic valves are used for controlling the upper cavity piston of the relay valve to inflate or deflate, so that the output pressure of the relay valve is accurately controlled, the air pressure in the hydraulic retarder is accurately controlled, and the control method has the advantages of being low in cost and good in vibration resistance.
Drawings
FIG. 1 is a schematic structural diagram of a hydraulic retarder control device based on a switch type electromagnetic valve provided by the invention;
FIG. 2 is a schematic control principle diagram of a hydraulic retarder control device based on a switch type electromagnetic valve provided by the invention;
FIG. 3 is a flowchart of a method for controlling a hydraulic retarder based on a switch-type solenoid valve according to the present invention.
In the figure:
100. a hydrodynamic retarder;
1. a pressure limiting valve; 11. a first gas line; 12. a second gas line; 2. a relay valve; 3. an air inlet solenoid valve; 4. an exhaust solenoid valve; 5. a pressure sensor; 6. a retarder controller; 7. a control handle; 8. an air reservoir.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The invention firstly provides a hydraulic retarder control device based on a switch type electromagnetic valve, which is used for solving the problems of high control cost and poor vibration resistance of compressed gas in the hydraulic retarder, and as shown in figures 1 and 2, the control device comprises a pressure limiting valve 1, a relay valve 2, an air inlet electromagnetic valve 3 and an air outlet electromagnetic valve 4, wherein the inlet of the pressure limiting valve 1 is connected with an air source; the air inlet of the relay valve 2 is fluidly connected to the outlet of the pressure limiting valve 1 through a first air pipeline 11, and the air outlet of the relay valve 2 is fluidly connected to the hydraulic retarder 100 to provide compressed air for the hydraulic retarder 100; the air inlet electromagnetic valve 3 is in fluid connection with the outlet of the pressure limiting valve 1 through a second gas pipeline 12; the exhaust electromagnetic valve 4 is in fluid connection between the air outlet of the air inlet electromagnetic valve 3 and the upper control piston cavity of the relay valve 2; the intake solenoid valve 3 and the exhaust solenoid valve 4 are both switch type solenoid valves.
In the hydraulic retarder control device based on the switch-type solenoid valve provided in the above embodiment, the air intake solenoid valve 3 and the air exhaust solenoid valve 4 are both switch-type solenoid valves, and compressed air from an air source reaches the air intake solenoid valve 3 through the pressure limiting valve 1 and waits for a control instruction; when the air inlet electromagnetic valve 3 acts, compressed gas enters the upper control piston cavity of the relay valve 2 through the air inlet electromagnetic valve 3 and the air outlet electromagnetic valve 4, the relay valve 2 is controlled to open a valve port so as to output the compressed gas to the hydraulic retarder 100, and the hydraulic retarder 100 works; when exhaust is needed, the exhaust electromagnetic valve 4 is electrified to discharge the compressed gas in the upper cavity of the control piston, the relay valve 2 is controlled to close the valve port, and the compressed gas in the hydraulic retarder 100 is discharged through the relay valve 2 and the exhaust electromagnetic valve 4. In the above embodiment, the relay valve 2 is controlled by using two on-off solenoid valves to realize accurate control of the pressure of the compressed gas, and compared with the scheme of using a proportional solenoid valve in the prior art, the relay valve has the advantages of fast response and low cost.
Optionally, a hydraulic retarder control device based on a switch type solenoid valve of the present embodiment further includes a pressure sensor 5, and the pressure sensor 5 is disposed between the relay valve 2 and the hydraulic retarder 100.
As shown in fig. 1, in the present embodiment, the pressure sensor 5 is a gas pressure sensor, and is used to detect the pressure of the compressed gas at the inlet of the hydrodynamic retarder 100, as a kind of monitoring data, and also as feedback data to perform closed-loop control of the pressure of the compression lift.
Optionally, the hydraulic retarder control device based on the switch type electromagnetic valve further includes a retarder controller 6, and the air inlet electromagnetic valve 3, the air outlet electromagnetic valve 4 and the pressure sensor 5 are electrically connected with the retarder controller 6 respectively.
As shown in fig. 2, the retarder controller 6 can control the energization time of the intake solenoid valve 3 and the exhaust solenoid valve 4 according to the target pressure of the hydraulic retarder 100, and thus the target pressure can be achieved. The pressure sensor 5 can collect the inlet pressure of the hydraulic retarder 100, and feeds back the pressure data to the retarder control 6, so as to form closed-loop control of the pressure of the compressed gas, and thus, the air pressure accuracy of the hydraulic retarder 100 is guaranteed and improved.
Optionally, the hydraulic retarder control apparatus based on the on-off solenoid valve further includes a control handle 7, and the control handle 7 is connected to the retarder controller 6 to send a gear instruction to the retarder controller 6.
As shown in fig. 2, the control handle 7 is provided with a plurality of gears, corresponding to different pressure requirements of the hydraulic retarder 100, the control handle 7 is manually controlled, a gear instruction is sent to the retarder controller 6 after each gear shifting, the retarder controller 6 calculates a target pressure of the hydraulic retarder 100 according to the gear instruction, and the target pressure is realized through the energization time of the intake solenoid valve 3 and the exhaust solenoid valve 4.
Optionally, the hydraulic retarder control device based on the on-off solenoid valve further includes an air tank 8, and compressed air is stored in the air tank 8 and used as an air source of the hydraulic retarder 100.
Referring to fig. 2, an air reservoir 8 is used as an air source to provide compressed air for the hydrodynamic retarder 100, and a pressure limiting valve 1 is disposed on an outlet pipeline of the air reservoir 8 to prevent the hydrodynamic retarder 100 from being damaged due to the internal pressure exceeding the safety pressure.
Alternatively, the intake solenoid valve 3 and the exhaust solenoid valve 4 are both high-speed switching solenoid valves, and the operating frequency of the high-speed switching solenoid valves is 300 HZ.
In this embodiment, two-position three-way solenoid valves are adopted for the air inlet solenoid valve 3 and the air outlet solenoid valve 4, and compared with a proportional solenoid valve adopted in the prior art, the use cost is greatly reduced. By selecting the action frequency of the high-speed switching electromagnetic valve, the pressure accuracy of the compressed gas of the hydraulic retarder 100 can be ensured, and the hydraulic retarder is fast in response and good in vibration resistance.
The invention also provides a control method of the hydraulic retarder device based on the switch type electromagnetic valve, as shown in fig. 1-3, comprising the following steps:
s1, compressed gas from a gas source reaches the air inlet solenoid valve 3 through the pressure limiting valve 1 and waits for a control instruction;
s2, when the air inlet electromagnetic valve 3 acts, compressed gas enters the upper control piston cavity of the relay valve 2 through the air inlet electromagnetic valve 3 and the air outlet electromagnetic valve 4, the relay valve 2 is controlled to open a valve port so as to output the compressed gas to the hydraulic retarder 100, and the hydraulic retarder 100 works;
when exhaust is needed, the exhaust electromagnetic valve 4 is electrified to discharge the compressed gas in the upper cavity of the control piston, the relay valve 2 is controlled to close the valve port, and the compressed gas in the hydraulic retarder 100 is discharged through the relay valve 2 and the exhaust electromagnetic valve 4.
As shown in fig. 2, after compressed gas is introduced into the hydraulic retarder 100, the hydraulic oil level drops and enters the working cavities of the stator and the rotor, so as to realize the retarding function. The function of the pressure limiting valve 1 is to prevent the pressure inside the hydrodynamic retarder 100 from exceeding a safety pressure; the air inlet electromagnetic valve 3 and the air outlet electromagnetic valve 4 adopt switch type two-position three-way electromagnetic valves, so that the cost is low, the control is facilitated, and the control precision is high. According to the control method of the hydraulic retarder based on the switch type electromagnetic valves, the two switch type electromagnetic valves are adopted to control the cavity piston on the relay valve 2 to inflate or deflate, so that the accurate control of the output pressure of the relay valve 2 is realized, the accurate control of the air pressure inside the hydraulic retarder 100 is further realized, and the control method has the advantages of low cost and good vibration resistance.
Alternatively, the intake solenoid valve 3 and the exhaust solenoid valve 4 are electrically connected to a retarder controller 6, respectively, and the retarder controller 6 adjusts and controls the energization time of the intake solenoid valve 3 and the exhaust solenoid valve 4 according to the target pressure of the hydraulic retarder 100.
In this embodiment, the retarder controller 6 calculates the target pressure of the hydraulic retarder 100 according to the shift command provided by the control handle 7, and then realizes the target pressure by adjusting the power-on time of the intake solenoid valve 3 and the exhaust solenoid valve 4, and meanwhile, the exhaust of the compressed gas can be further controlled, so as to recover the initial state of the hydraulic retarder 100.
Optionally, the retarder controller 6 collects the inlet pressure of the hydraulic retarder 100 through the pressure sensor 5, and adjusts and controls the energization time of the intake solenoid valve 3 and the exhaust solenoid valve 4 according to the difference between the inlet pressure and the target pressure.
It should be explained that, the sensing head of the pressure sensor 5 is disposed at the compressed gas inlet of the hydraulic retarder 100, and is used to detect the inlet pressure of the hydraulic retarder 100, and feed back the inlet pressure to the retarder controller 6, when there is a difference between the inlet pressure and the target pressure, the retarder controller 6 can control the inlet pressure to reach the target pressure by adjusting the air intake solenoid valve 3 and the air exhaust solenoid valve 4, and the air intake solenoid valve 3 and the air exhaust solenoid valve 4 select the on-off solenoid valve, which is low in cost, fast in response, simple in control, high in control precision, and convenient for popularization and implementation.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A hydrodynamic retarder control device based on a switch type electromagnetic valve is characterized by comprising:
the inlet of the pressure limiting valve (1) is connected with an air source;
the air inlet of the relay valve (2) is fluidly connected to the outlet of the pressure limiting valve (1) through a first air pipeline (11), and the air outlet of the relay valve (2) is fluidly connected to a hydrodynamic retarder (100) to provide compressed air for the hydrodynamic retarder (100);
an air inlet solenoid valve (3), the air inlet solenoid valve (3) being fluidly connected to the outlet of the pressure limiting valve (1) by a second gas line (12);
the exhaust electromagnetic valve (4), the exhaust electromagnetic valve (4) is connected between the air outlet of the air inlet electromagnetic valve (3) and the control piston upper cavity of the relay valve (2) in a fluid mode;
the air inlet electromagnetic valve (3) and the air outlet electromagnetic valve (4) are both switch type electromagnetic valves.
2. A switched-solenoid valve based hydrodynamic retarder control device according to claim 1, characterized by further comprising a pressure sensor (5), the pressure sensor (5) being arranged between the relay valve (2) and the hydrodynamic retarder (100).
3. A switched-solenoid valve based hydrodynamic retarder control device according to claim 2, characterized by further comprising a retarder controller (6), wherein the inlet solenoid valve (3), the outlet solenoid valve (4) and the pressure sensor (5) are electrically connected to the retarder controller (6), respectively.
4. A switched-solenoid valve based hydrodynamic retarder control device according to claim 2, characterized in that the pressure sensor (5) is an air pressure sensor.
5. A hydrodynamic retarder control device based on a switch-type solenoid valve according to claim 1, characterized by further comprising a control handle (7), the control handle (7) being connected to the retarder controller (6) to send gear commands to the retarder controller (6).
6. A hydrodynamic retarder control device based on a switch type solenoid valve according to claim 1, characterized in that it further comprises a gas cartridge (8), the gas cartridge (8) storing compressed gas as the gas source of the hydrodynamic retarder (100).
7. A hydrodynamic retarder control device based on-off solenoid valves according to claim 1, characterized in that the inlet solenoid valve (3) and the outlet solenoid valve (4) are both high speed on-off solenoid valves, the frequency of action of which is 300 HZ.
8. A control method for a hydraulic retarder control device based on a switch type electromagnetic valve according to any of the claims 1-7, characterized by comprising the steps of:
s1, compressed gas from a gas source reaches the air inlet electromagnetic valve (3) through the pressure limiting valve (1) and waits for a control instruction;
s2, when the air inlet electromagnetic valve (3) acts, compressed air enters an upper control piston cavity of the relay valve (2) through the air inlet electromagnetic valve (3) and the air outlet electromagnetic valve (4), the relay valve (2) is controlled to open a valve port to output the compressed air to the hydraulic retarder (100), and the hydraulic retarder (100) works;
when exhaust is needed, the exhaust electromagnetic valve (4) is electrified to discharge compressed gas in the upper cavity of the control piston, the relay valve (2) is controlled to close a valve port, and the compressed gas in the hydraulic retarder (100) is discharged through the relay valve (2) and the exhaust electromagnetic valve (4).
9. The control method according to claim 8, characterized in that the inlet solenoid valve (3) and the outlet solenoid valve (4) are electrically connected to a retarder controller (6), respectively, and the retarder controller (6) adjusts and controls the energization time of the inlet solenoid valve (3) and the outlet solenoid valve (4) according to the target pressure of the hydrodynamic retarder (100).
10. A control method according to claim 9, characterized in that the retarder controller (6) collects the inlet pressure of the hydrodynamic retarder (100) via a pressure sensor (5), and adjusts and controls the energization times of the inlet solenoid valve (3) and the outlet solenoid valve (4) depending on the difference between the inlet pressure and the target pressure.
CN202110468991.6A 2021-04-28 2021-04-28 Hydraulic retarder control device and control method based on switch type electromagnetic valve Pending CN113002504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110468991.6A CN113002504A (en) 2021-04-28 2021-04-28 Hydraulic retarder control device and control method based on switch type electromagnetic valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110468991.6A CN113002504A (en) 2021-04-28 2021-04-28 Hydraulic retarder control device and control method based on switch type electromagnetic valve

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CN113002504A true CN113002504A (en) 2021-06-22

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101070887A (en) * 2007-05-18 2007-11-14 深圳市特尔佳科技股份有限公司 Hydraulic speed buffer control system and control method
CN203868190U (en) * 2014-05-16 2014-10-08 陕西法士特齿轮有限责任公司 Hydraulic retarder provided with idle self-lubrication system
CN210133103U (en) * 2019-06-19 2020-03-10 一汽解放汽车有限公司 Auxiliary braking system and vehicle
CN111043097A (en) * 2020-01-07 2020-04-21 无锡峰烽达科技有限公司 Proportional control valve of hydraulic retarder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101070887A (en) * 2007-05-18 2007-11-14 深圳市特尔佳科技股份有限公司 Hydraulic speed buffer control system and control method
CN203868190U (en) * 2014-05-16 2014-10-08 陕西法士特齿轮有限责任公司 Hydraulic retarder provided with idle self-lubrication system
CN210133103U (en) * 2019-06-19 2020-03-10 一汽解放汽车有限公司 Auxiliary braking system and vehicle
CN111043097A (en) * 2020-01-07 2020-04-21 无锡峰烽达科技有限公司 Proportional control valve of hydraulic retarder

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