CN113246938B - Retarder braking torque pressure control system and method - Google Patents
Retarder braking torque pressure control system and method Download PDFInfo
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- CN113246938B CN113246938B CN202110755120.2A CN202110755120A CN113246938B CN 113246938 B CN113246938 B CN 113246938B CN 202110755120 A CN202110755120 A CN 202110755120A CN 113246938 B CN113246938 B CN 113246938B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE 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
- B60T10/00—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope
- B60T10/02—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope with hydrodynamic brake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D57/00—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
- F16D57/02—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders with blades or like members braked by the fluid
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Fluid Mechanics (AREA)
- Transportation (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a retarder braking torque pressure control system and a method, comprising a thrust device, a retarder oil inlet oil duct, a retarder working cavity feedback oil duct, a retarder oil return oil duct, a retarder control valve, an oil cooler oil inlet oil duct, an oil cooler oil return oil duct and a back pressure feedback oil path; the thrust device pushes a main valve core in the retarder control valve to move, so that the thrust of the retarder working cavity pressure on the main valve core and the elastic force of the spring are balanced with the thrust of the thrust device, the pressure of the retarder working cavity is controlled by controlling the thrust of the thrust device, and the braking torque of the retarder is further controlled. When the retarder works, the liquid filling rate in the working cavity is constant, the braking torque of the retarder is changed by adjusting and controlling the thrust to change the pressure difference between the working cavity and the oil outlet of the retarder, the control response speed is high, and the adjustment precision is high.
Description
Technical Field
The invention belongs to the technical field of gearboxes, and particularly belongs to a retarder braking torque pressure control system and method.
Background
The traditional retarder control method is as follows: the working cavity between the retarder rotor and the stator is communicated with an oil tank, the liquid level of the oil tank is communicated with the outlet of the control air valve, when the retarder needs to generate braking torque, the system sends an instruction to control the air valve to be opened, control gas is filled into the upper cavity of the liquid level of the oil tank through an air pipe, the pressure of the cavity of the oil tank enables hydraulic oil with a certain volume to enter the working cavity between the retarder rotor and the stator, the high-speed rotation of the rotor enables the oil to generate centrifugal force and impact on stator blades, the stator blades generate reaction force for the rotating oil, the reaction force is the braking torque of the retarder, the higher the pressure of the control air valve is, the more the oil in the working cavity is, and the larger the braking torque of the retarder is. When the control valve is powered off, the liquid level of the oil tank is communicated with the atmosphere, oil does not enter the working cavity any more, oil in the working cavity is thrown out of the working cavity under the action of centrifugal force, the liquid level of the oil in the oil pool is raised, and the braking force of the retarder is released.
The traditional retarder control method adopts gas-liquid control, adjusts the liquid filling rate in a working cavity of the retarder by controlling the pressure of an air valve, realizes the adjustment of the braking torque of the retarder and has certain technical defects: because the oil tank is bigger, gaseous compressibility leads to the retarber control response to slower, and adjusts the precision lower.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a retarder braking torque pressure control system and a method.
In order to achieve the purpose, the invention provides the following technical scheme:
a retarder braking torque pressure control system is characterized by comprising a thrust device, a retarder oil inlet oil duct, a retarder working cavity feedback oil duct, a retarder oil return oil duct, a retarder control valve, an oil cooler oil inlet oil duct, an oil cooler oil return oil duct and a backpressure feedback oil path;
a main valve core is arranged in the retarder control valve, and a retarder working cavity feedback oil port and a spring are arranged at one end of the main valve core; the thrust device is pressed against the other end of the main valve core to push the main valve core of the retarder control valve to move;
the retarder control valve is provided with a valve block oil inlet, a first overflow oil return tank oil port, a second overflow oil return tank oil port, a retarder oil inlet cooler oil port, a back pressure feedback oil port, a retarder oil inlet and a retarder oil outlet;
the retarder oil inlet duct is communicated with the retarder working cavity and the retarder oil inlet; the retarder oil return passage is communicated with the retarder working cavity and the retarder oil outlet; the oil cooler oil inlet duct is communicated with the oil cooler inner cavity and the retarder oil cooler oil inlet opening, and the oil cooler oil return duct is communicated with the oil cooler inner cavity and the valve block oil inlet; the retarder working cavity feedback oil passage is communicated with a retarder working cavity feedback oil port of the retarder control valve and a retarder working cavity;
when the retarder control valve is in an out-of-operation state, the oil cooler oil return passage is communicated with the valve block oil inlet, and the valve block oil inlet is communicated with the first overflow oil return tank oil port; the retarder oil outlet is communicated with a second overflow oil return tank oil port;
when the retarder control valve is in a working state, the oil cooler oil return passage is communicated with the valve block oil inlet, and the valve block oil inlet is respectively communicated with the retarder oil inlet and the first overflow oil return tank oil port; and the retarder oil outlet is communicated with the retarder oil inlet cooler oil port.
Preferably, the thrust device is a proportional control air valve, the proportional control air valve is communicated with an air valve core through a control air path, and the air valve core is pressed on the main valve core.
Preferably, the retarder control valve is a three-position seven-way valve.
Preferably, when the retarder control valve is in the maximum operation state,
the oil cooler oil return duct is communicated with an oil inlet of the valve block, the valve block oil inlet is communicated with an oil inlet of the retarder, and the retarder oil inlet is communicated with an oil inlet duct of the retarder;
the back pressure feedback oil port is communicated with the first overflow oil return tank oil port, and the back pressure feedback oil port is communicated with the back pressure feedback oil way;
the retarder oil return duct is communicated with a retarder oil outlet, the retarder oil outlet is communicated with a retarder oil inlet cooler oil port, and the retarder oil inlet cooler oil port is communicated with an oil cooler oil inlet duct.
Preferably, the first overflow oil return tank oil port and the second overflow oil return tank oil port are communicated with each other.
A retarder braking torque pressure control method comprises the following processes,
the thrust device pushes a main valve core in the retarder control valve to move, so that the pressure of the working cavity of the retarder balances the thrust of the main valve core and the elasticity of the spring with the thrust of the thrust device, and the pressure of the working cavity of the retarder is controlled by controlling the thrust of the thrust device, so that the braking torque of the retarder is controlled.
Preferably, when the proportional control gas valve is used as the thrust device, the following process is included,
the proportional control air valve pushes a main valve core in the retarder control valve to move, so that the thrust of the retarder working cavity to the main valve core plus the elastic force of the spring is balanced with the thrust of the proportional control air valve, the pressure of the retarder working cavity is controlled through the thrust of the proportional control air valve, and the braking torque of the retarder is controlled.
Further, when the proportional control air valve is not powered on, the retarder control valve core is located at the end position under the action of spring force, the valve block oil inlet is communicated with the first overflow oil return tank oil port, cooling oil directly returns to the oil tank through the first overflow oil return tank oil port, and the retarder does not generate braking torque.
Furthermore, when the proportional control air valve works by electrifying current, compressed air in the proportional control air valve pushes the air valve spool, the air valve spool pushes the main valve spool to move against the force of the spring, the oil inlet of the valve block is communicated with the oil inlet of the retarder and the oil port of the first overflow oil return tank, the oil outlet of the retarder is communicated with the oil port of the oil inlet cooler of the retarder, oil enters the retarder to work, the retarder generates braking torque, the pressure difference of the working cavity of the retarder is adjusted by adjusting the pressure of the proportional control air valve, and the braking torque of the retarder is adjusted.
Furthermore, when the proportional control air valve works at the maximum current, the main valve core of the retarder control valve is pushed by the air valve core to be positioned at the end part of the spring side, cooling oil of the cooling oil return channel enters the retarder working cavity through the retarder control valve, hydraulic oil passing through the retarder working cavity enters the oil cooler through the retarder control valve and the oil inlet channel of the oil cooler, and the retarder generates the maximum braking torque at the moment.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a retarder braking torque pressure control system, which pushes a main valve core to move through a thrust device, so that the thrust of the main valve core added with a spring force by the pressure of a retarder working cavity is balanced with the thrust of the thrust device, the spring force is constant, the pressure of the retarder working cavity can be controlled through the thrust device, and the control of the retarder braking torque through the thrust of the thrust device is realized.
Under the working condition that the retarder and the hydraulic torque converter work together, the hydraulic torque converter returns oil to the oil cooler, an oil outlet of the oil cooler is connected to an oil inlet of the retarder and serves as an oil source of the retarder, and an oil outlet of the retarder directly returns to the oil tank to participate in circulation again. Compressed air provided by the air pump is used as a power source of the control system, the valve core of the air valve is controlled by the proportional control air valve to push the main valve core to move, so that the thrust of the pressure difference between the pressure of the working cavity of the retarder and the pressure of the oil outlet of the retarder to the main valve core is balanced by the sum of the spring force and the thrust of the pressure of the proportional control air valve to the valve core, the pressure of the working cavity of the retarder can be controlled by the proportional control air valve, and the brake torque of the retarder is controlled by the proportional control air valve.
Furthermore, thrust is provided by adopting the proportional control air valve, system oil circuit arrangement is facilitated, the whole structure is simple, and pollution can be avoided.
The invention provides a retarder braking torque pressure control method, which is characterized in that the pressure difference between a working cavity between a retarder rotor and a retarder stator and a retarder oil outlet is controlled by adjusting the pressure of an electromagnetic proportional air valve, the larger the pressure difference is, the larger the reaction force generated by a stator blade to rotating oil liquid is, and the larger the braking torque of the retarder is. Compared with the traditional retarder control method, the control method of the invention has the advantages that the retarder oil circuit is used as a part of the whole circulating oil circuit, no separate oil tank is needed, the size is small, and the weight is light; the method is different from the traditional retarder that the brake torque of the retarder is changed by controlling and adjusting the liquid filling rate in the working cavity through the air valve when the retarder works, the liquid filling rate in the working cavity is constant when the retarder works, and the brake torque of the retarder is changed by adjusting and controlling the air pressure to change the pressure difference between the working cavity and the oil outlet of the retarder. The problem that the air valve needs to enable air above the liquid level of the whole oil tank to reach a set pressure value, the oil in the oil tank is pressed into the working cavity, the response is slow, and an energy accumulator is generally needed to be additionally arranged to improve the response speed of the retarder is solved; the core of the control method of the invention is hydraulic control, and the oil liquid is incompressible, so that the control method has the advantage of high operation precision compared with air pressure control, and the adjustment precision is higher.
Drawings
FIG. 1 is a hydraulic schematic diagram of an initial state of a retarder braking torque pressure control system in an embodiment of the present invention;
FIG. 2 is a schematic diagram of an initial state of a retarder control valve in an embodiment of the invention;
FIG. 3 is a hydraulic schematic diagram of a working state of a retarder braking torque pressure control system in an embodiment of the present invention;
FIG. 4 is a schematic diagram of an operating state of a retarder control valve in an embodiment of the present invention;
FIG. 5 is a hydraulic schematic diagram of a maximum operating state of a retarder braking torque pressure control system in an embodiment of the present invention;
FIG. 6 is a schematic diagram of a maximum operating state of a retarder control valve in an embodiment of the present invention;
FIG. 7 is a normal state structure diagram of a retarder control valve in an embodiment of the present invention;
FIG. 8 is a diagram of an intermediate state structure of a retarder control valve in an embodiment of the present invention;
FIG. 9 is a state structure diagram of a control valve of the retarder for maximum braking torque according to an embodiment of the present invention;
in the drawings: 1 is compressed air; 2 is a proportional control air valve; 3 is a control gas circuit; 4 is an oil inlet duct of the retarder; 5 is a retarder working cavity feedback oil passage; 6 is a retarder oil return passage; 7 is a retarder control valve; 8 is an oil inlet duct of the oil cooler; 9 is an oil cooler oil return passage; 10 is a valve core of an air valve; 11 is a main valve core; 12 is a valve block oil inlet; 13 is a first overflow oil return tank oil port; a second overflow oil return tank port 14; 15 is an oil inlet of a retarder into an oil cooler port; 16 is a spring; 17 is a back pressure feedback oil path; 18 is an oil inlet of the retarder; 19 is a back pressure feedback oil port; 20 is a retarder oil outlet; 21 is a retarder working cavity feedback oil port; 22 is an oil port of the retarder deoiling cooler; and 23 is a retarder working cavity.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention provides a retarder braking torque pressure control system which comprises a thrust device, a retarder oil inlet oil duct 4, a retarder working cavity feedback oil duct 5, a retarder oil return oil duct 6, a retarder control valve 7, an oil cooler oil inlet oil duct 8, an oil cooler oil return oil duct 9 and a backpressure feedback oil path 17.
A main valve core 11 is arranged in the retarder control valve 7, and a retarder working cavity feedback oil port 21 and a spring 16 are arranged at one end of the main valve core 11; the thrust device is pressed against the other end of the main valve core 11 to push the main valve core 11 of the retarder control valve 7 to move; the retarder control valve 7 is provided with a valve block oil inlet 12, a first overflow oil return tank oil port 13, a second overflow oil return tank oil port 14, a retarder oil inlet cooler oil port 15, a retarder oil inlet 18 and a retarder oil outlet 20.
The retarder oil inlet duct 4 is communicated with the retarder working cavity 23 and the retarder oil inlet 18; the retarder oil return passage 6 is communicated with a retarder working cavity 23 and a retarder oil outlet 20; the oil cooler oil inlet duct 8 is communicated with the oil cooler inner cavity and the retarder oil cooler oil inlet port 15, and the oil cooler oil return duct 9 is communicated with the oil cooler inner cavity and the valve block oil inlet 12; the retarder working chamber feedback oil passage 5 is communicated with a retarder working chamber feedback oil port 21 and a retarder working chamber 23 of the retarder control valve 7.
When the retarder control valve 7 is in an out-of-operation state, the oil cooler oil return duct 9 is communicated with the valve block oil inlet 12, and the valve block oil inlet 12 is communicated with the first overflow oil return tank oil port 13; the retarder oil outlet 20 is communicated with the second overflow oil return tank oil port 14.
When the retarder control valve 7 is in a working state, the oil cooler oil return duct 9 is communicated with the valve block oil inlet 12, and the valve block oil inlet 12 is respectively communicated with the retarder oil inlet 18, the backpressure feedback oil port 19 and the first overflow oil return tank oil port 13; the retarder oil outlet 20 is communicated with the retarder oil cooler inlet 15.
The retarder braking torque pressure control system controls the pressure of the retarder working cavity 23 by controlling the thrust of the thrust device, and further controls the retarder braking torque. According to the invention, the pressure difference between the working cavity between the rotor and the stator of the retarder and the retarder oil outlet 20 is controlled by adjusting the thrust of the thrust device, and the larger the pressure difference is, the larger the reaction force generated by the stator blades to the rotating oil liquid is, and the larger the braking torque of the retarder is.
The invention relates to a retarder braking torque pressure control method, which comprises the following processes that a thrust device pushes a main valve core 11 in a retarder control valve 7 to move, so that the thrust of a retarder working cavity 23 on the main valve core 11 plus the elastic force of a spring 16 is balanced with the thrust of the thrust device, and the pressure of the retarder working cavity 23 is controlled by controlling the thrust of the thrust device, so that the retarder braking torque is controlled.
Compared with the traditional retarder control method, the control method of the invention has the advantages that the retarder oil circuit is used as a part of the whole circulating oil circuit, no separate oil tank is needed, the size is small, and the weight is light; according to the traditional control method, the air valve needs to enable air above the liquid level of the whole oil tank to reach a set pressure value, oil in the oil tank is pressed into a working cavity, response is slow, an energy accumulator needs to be additionally arranged to improve the response speed of the retarder, the air valve only needs to push the valve core 10 of the air valve, response speed is high, the energy accumulator does not need to be additionally arranged, and cost is saved; the core of the control method is hydraulic control, and the control method has the advantage of high operation precision compared with air pressure control due to incompressibility of oil, so that the adjustment precision is higher.
Examples
As shown in fig. 1 to 6, the retarder braking torque pressure control system of the present invention includes a proportional control air valve 2, a control air passage 3, a retarder oil inlet passage 4, a retarder working chamber feedback oil passage 5, a retarder oil return passage 6, a retarder control valve 7, an oil cooler oil inlet passage 8, an oil cooler oil return passage 9, and a backpressure feedback oil passage 17.
A main valve core 11 is arranged in the retarder control valve 7, a spring 16 is arranged at one end of the main valve core 11, the other end of the main valve core 11 is connected with an air valve core 10, a proportional control air valve 2 is communicated with the air valve core 10 through a control air path 3 to push the main valve core 11 of the retarder control valve 7 to move, and the retarder control valve 7 is a three-position seven-way valve;
the lower port of the retarder control valve 7 is sequentially provided with a valve block oil inlet 12, a first overflow oil return tank oil port 13, a second overflow oil return tank oil port 14 and a retarder oil cooler oil inlet 15; an upper port of the retarder control valve 7 is a retarder oil inlet 18, a backpressure feedback oil port 19 and a retarder oil outlet 20 in sequence;
one end of the retarder oil inlet duct 4 is communicated with the retarder working cavity 23, and the other end of the retarder oil inlet duct 4 is communicated with the retarder oil inlet 18; one end of the retarder oil return passage 6 is communicated with the retarder working cavity 23, and the other end of the retarder oil return passage 6 is communicated with the retarder oil outlet 20;
one end of an oil cooler oil inlet duct 8 is communicated with an oil cooler inner cavity, the other end of the oil cooler oil inlet duct 8 is communicated with a retarder oil cooler oil inlet port 15, one end of an oil cooler oil return duct 9 is communicated with the oil cooler inner cavity, and the other end of the oil cooler oil return duct 9 is communicated with a valve block oil inlet 12;
one end of the backpressure feedback oil path 17 is connected with a backpressure feedback oil port 19, and the other end of the backpressure feedback oil path 17 is connected with the main valve core 11;
the retarder working cavity feedback oil passage 5 is communicated with a spring end of a main valve core 11 of a retarder control valve 7 and a retarder. The retarder working cavity feedback oil passage 5 is arranged between the retarder working cavity 23 and the retarder control valve 7, and the pressure in the retarder working cavity feedback oil passage 5 is the retarder working cavity pressure, so that the retarder braking torque is determined.
An air valve core of the proportional control air valve 2 is connected with an air valve core 10 of a retarder control valve 7 through a control air path 3, the air valve core 10 can push a main valve core 11 to move, a pressure regulating spring 16 is arranged on the right side of the main valve core 11, meanwhile, feedback pressure also acts on the right end face of the main valve core 11 through a retarder working cavity feedback oil path 5, the force of the air pressure of the proportional control air valve 2 acting on the air valve core 10 is equal to the sum of the force of the pressure of a retarder working cavity 23 acting on the main valve core 11 and the spring force generated by the deformation of the spring 16, the pressure of the retarder working cavity 23 is equal to the pressure difference generated by the air valve core 10 and the spring force, and the current control of the retarder through the proportional control air valve 2 is realized.
As shown in fig. 1, 2 and 7, when the proportional control air valve is not powered on 2, the controller pressure is zero, the retarder control valve core 11 is at the leftmost position under the action of the spring force, the cooling oil in the valve block oil inlet 12 passes through the backpressure feedback oil port 19 to push the main valve core 11 to move rightwards, so that the valve block oil inlet 12 is communicated with the first overflow oil return tank oil port 13, at this time, all the oil in the valve block directly returns to the oil tank, and the retarder does not generate braking torque.
As shown in fig. 3, 4 and 8, the control gas circuit 3 is connected to an outlet of the proportional gas valve 2, when the proportional control gas valve 2 operates at a certain current, the compressed gas 1 pushes the gas valve core 10, and further pushes the main valve core 11 to move rightwards against the spring force, at this time, the valve block oil inlet 12 is simultaneously communicated with the retarder oil inlet 18 and the first overflow oil return tank oil port 13, the retarder oil outlet 20 is communicated with the retarder oil cooler oil port 22, at this time, oil can enter the retarder to participate in the operation, the retarder generates a braking torque, the position of the main valve core 11 is related to the pressure of the control proportional control gas valve 2, the flow rate of the retarder is larger when the pressure is larger, the pressure difference between the retarder working cavity 23 and the retarder oil outlet 20 reaches the feedback oil cavity 7 through the retarder working cavity feedback oil port 21 to act on the right end of the main valve core 11, at this time, the thrust of the air pressure of the proportional control gas valve 2 acting on the main valve core 11 and the pressure difference between the retarder working cavity 23 and the retarder oil outlet 20 act on the main valve cavity 7 The sum of the thrust and the spring force of core is balanced, and through adjusting 2 pressure adjustable retarber working chamber 23 of proportional control pneumatic valve and the pressure differential of retarber oil-out 20, the pressure differential of retarber working chamber 23 and retarber oil-out 20 is big more, and stator blade produces the reaction force big more to the fluid of pairing rotation, and the braking moment of torsion of retarber is big more, and the retarber is worked at middle gear this moment, and the braking moment of torsion is controlled by proportional control pneumatic valve electric current size.
As shown in fig. 5, 6 and 9, when the proportional control air valve 2 operates at the maximum current, the main valve core 11 of the retarder control valve 7 is pushed by the air valve core 1 to be at the rightmost end position, all the cooling oil in the cooling oil return passage 9 enters the retarder through the retarder control valve 7 to participate in the operation, the high-temperature oil which operates through the retarder enters the oil cooler through the retarder control valve 7 and the oil inlet passage 8 of the oil cooler, and at this time, the retarder generates the maximum braking torque.
Claims (8)
1. A retarder braking torque pressure control system is characterized by comprising a thrust device, a retarder oil inlet oil duct (4), a retarder working cavity feedback oil duct (5), a retarder oil return oil duct (6), a retarder control valve (7), an oil cooler oil inlet oil duct (8), an oil cooler oil return oil duct (9) and a backpressure feedback oil path (17);
a main valve core (11) is arranged in the retarder control valve (7), and a retarder working cavity feedback oil port (21) and a spring (16) are arranged at one end of the main valve core (11); the thrust device is pressed against the other end of the main valve core (11) to push the main valve core (11) of the retarder control valve (7) to move;
a valve block oil inlet (12), a first overflow oil return tank oil port (13), a second overflow oil return tank oil port (14) and a retarder oil cooler oil inlet (15) are sequentially arranged below the retarder control valve (7); a retarder oil inlet (18), a back pressure feedback oil port (19) and a retarder oil outlet (20) are sequentially arranged above the retarder control valve (7);
the retarder oil inlet channel (4) is communicated with the retarder working cavity (23) and the retarder oil inlet (18); the retarder oil return passage (6) is communicated with the retarder working cavity (23) and the retarder oil outlet (20); the oil cooler oil inlet duct (8) is communicated with the oil cooler inner cavity and the retarder oil cooler oil inlet port (15), and the oil cooler oil return duct (9) is communicated with the oil cooler inner cavity and the valve block oil inlet (12); the retarder working cavity feedback oil passage (5) is communicated with a retarder working cavity feedback oil port (21) and a retarder working cavity (23) of the retarder control valve (7);
when the retarder control valve (7) is in an out-of-operation state, the oil cooler oil return channel (9) is communicated with the valve block oil inlet (12), and the valve block oil inlet (12) is communicated with the first overflow oil return tank oil port (13); the retarder oil outlet (20) is communicated with a second overflow oil return tank oil port (14);
when the retarder control valve (7) is in a non-maximum working state, the oil cooler oil return channel (9) is communicated with the valve block oil inlet (12), and the valve block oil inlet (12) is respectively communicated with the retarder oil inlet (18) and the first overflow oil return tank oil port (13); the retarder oil outlet (20) is communicated with a retarder oil inlet cooler oil port (15);
when the retarder control valve (7) is in the maximum working state, the oil cooler oil return channel (9) is communicated with the valve block oil inlet (12), the valve block oil inlet (12) is communicated with the retarder oil inlet (18), and the retarder oil inlet (18) is communicated with the retarder oil inlet channel (4);
the back pressure feedback oil port (19) is communicated with the first overflow oil return tank oil port (13), and the back pressure feedback oil port (19) is communicated with the back pressure feedback oil path (17);
the retarder oil return duct (6) is communicated with a retarder oil outlet (20), the retarder oil outlet (20) is communicated with a retarder oil inlet cooler oil port (15), and the retarder oil inlet cooler oil port (15) is communicated with an oil cooler oil inlet duct (8).
2. A retarder braking torque pressure control system according to claim 1, characterized in that the thrust device is a proportional control air valve (2), the proportional control air valve (2) is connected to an air valve spool (10) through a control air passage (3), and the air valve spool (10) is pressed against the main valve spool (11).
3. A retarder brake torque pressure control system according to claim 1, characterised in that the retarder control valve (7) is a three-position seven-way valve.
4. A retarder brake torque pressure control system according to claim 1, wherein the first and second overflow return tank oil ports (13, 14) are in communication with each other.
5. A retarder braking torque pressure control method, characterized in that a retarder braking torque pressure control system according to any of claims 1-4, comprises the following procedures,
the thrust device pushes a main valve core (11) in the retarder control valve (7) to move, so that the thrust of the retarder working cavity (23) to the main valve core (11) plus the elastic force of the spring (16) is balanced with the thrust of the thrust device, the pressure of the retarder working cavity (23) is controlled by controlling the thrust of the thrust device, and the braking torque of the retarder is further controlled.
6. A retarder brake torque pressure control method according to claim 5, characterised in that when using the proportional control valve (2) as the thrust means, it comprises the following procedures,
the proportional control air valve (2) pushes a main valve core (11) in the retarder control valve (7) to move, so that the thrust of the retarder working cavity (23) to the main valve core (11) plus the elastic force of the spring (16) is balanced with the thrust of the proportional control air valve (2), the pressure of the retarder working cavity (23) is controlled through the thrust of the proportional control air valve (2), and the braking torque of the retarder is controlled.
7. A retarder braking torque pressure control method according to claim 5, characterized in that when the proportional control air valve (2) is not energized, the main valve core (11) of the retarder control valve (7) is in the end position under the action of the spring force, the valve block oil inlet (12) is communicated with the first overflow oil return tank oil port (13), the cooling oil directly returns to the oil tank through the first overflow oil return tank oil port (13), and the retarder does not generate the braking torque.
8. The method for controlling the braking torque and pressure of the retarder according to claim 5, wherein when the proportional control air valve (2) is operated at a non-maximum current, compressed air (1) in the proportional control air valve (2) pushes an air valve spool (10), the air valve spool (10) pushes a main valve spool (11) to move against the force of a spring (16), a valve block oil inlet (12) is communicated with a retarder oil inlet (18) and a first overflow oil return tank oil port (13), a retarder oil outlet (20) is communicated with a retarder oil inlet cooler oil port (15), oil enters the retarder to operate, the retarder generates braking torque, and the pressure of the proportional control air valve (2) is adjusted to adjust the braking torque of the retarder;
when the proportional control air valve (2) works at the maximum current, a main valve core (11) of the retarder control valve (7) is pushed by an air valve core (10) to be located at the end position of the spring side, cooling oil of the cooling oil return channel (9) enters a retarder working cavity (23) through the retarder control valve (7), hydraulic oil passing through the retarder working cavity (23) enters an oil cooler through the retarder control valve (7) and an oil cooler oil inlet channel (8), and the retarder generates the maximum braking torque at the moment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110755120.2A CN113246938B (en) | 2021-07-05 | 2021-07-05 | Retarder braking torque pressure control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110755120.2A CN113246938B (en) | 2021-07-05 | 2021-07-05 | Retarder braking torque pressure control system and method |
Publications (2)
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| CN114060493A (en) * | 2021-11-16 | 2022-02-18 | 贵州凯星液力传动机械有限公司 | Hydraulic control system of retarder |
| CN114352697B (en) * | 2021-12-21 | 2023-09-08 | 西安法士特汽车传动有限公司 | Integrated control hydraulic system and control method for torque converter and retarder |
| CN114454857B (en) * | 2021-12-23 | 2023-01-06 | 陕西法士特齿轮有限责任公司 | Retarder control method and system responding to braking request of electronic braking system |
| CN114396440A (en) * | 2021-12-23 | 2022-04-26 | 陕西法士特齿轮有限责任公司 | Independent assembly type front retarder system and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2195300A5 (en) * | 1972-08-05 | 1974-03-01 | Voith Turbo Kg | |
| JPH07132805A (en) * | 1993-11-10 | 1995-05-23 | Daikin Mfg Co Ltd | Retarder system |
| DE19833891A1 (en) * | 1998-07-28 | 2000-02-03 | Zahnradfabrik Friedrichshafen | Hydrodynamic retarder for motor vehicle has control system with regulating valve to deliver contents of pressurized accumulator to retarder, and which controls both emptying and replenishment of accumulator |
| CN101566200A (en) * | 2009-05-11 | 2009-10-28 | 湘潭大学 | Pneumatic and hydraulic liquid power retarder controller |
| CN104875733A (en) * | 2014-02-28 | 2015-09-02 | 林会明 | Hydraulic retarder control system and control method |
| CN208686849U (en) * | 2018-04-17 | 2019-04-02 | 遵义师范学院 | A kind of oil piping system for Vehicle Hydraulic Retarder |
-
2021
- 2021-07-05 CN CN202110755120.2A patent/CN113246938B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2195300A5 (en) * | 1972-08-05 | 1974-03-01 | Voith Turbo Kg | |
| GB1380847A (en) * | 1972-08-05 | 1975-01-15 | Voith Turbo Kg | Hydrodynamic brake |
| JPH07132805A (en) * | 1993-11-10 | 1995-05-23 | Daikin Mfg Co Ltd | Retarder system |
| DE19833891A1 (en) * | 1998-07-28 | 2000-02-03 | Zahnradfabrik Friedrichshafen | Hydrodynamic retarder for motor vehicle has control system with regulating valve to deliver contents of pressurized accumulator to retarder, and which controls both emptying and replenishment of accumulator |
| CN101566200A (en) * | 2009-05-11 | 2009-10-28 | 湘潭大学 | Pneumatic and hydraulic liquid power retarder controller |
| CN104875733A (en) * | 2014-02-28 | 2015-09-02 | 林会明 | Hydraulic retarder control system and control method |
| CN208686849U (en) * | 2018-04-17 | 2019-04-02 | 遵义师范学院 | A kind of oil piping system for Vehicle Hydraulic Retarder |
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