Hydraulic retarder pneumatic control system based on electromagnetic valve

Abstract

A hydraulic retarder pneumatic control system based on an electromagnetic valve comprises an air source and an oil pool shell, the air source is sequentially connected with a pilot valve and a first inlet of a pneumatic valve in series, and the air source is further communicated with a second inlet of the pneumatic valve; an outlet of the pneumatic valve is connected in series with at least two parallel solenoid valves, outlets of the solenoid valves are connected in series with a quick discharge valve, and a first outlet of the quick discharge valve is communicated with the oil pool shell. Through reasonable arrangement of component structures and design of a pilot valve, no back pressure resistance exists during starting, the reversing resistance is small, and the system response time is greatly prolonged; and meanwhile, the electromagnetic valve is located behind the pneumatic valve, so that the starting backpressure is small, the starting power is small, quick response of work of the retarder is integrally achieved, the work response time is shortened, the cost is reduced, the overall stability of the system is improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of hydraulic retarder, specifically relates to a hydraulic retarder pneumatic control system based on solenoid valve. BACKGROUND

[0002] At present, the control mode of the hydraulic retarder at home and abroad is mainly through the air intake actuating mechanism to proportion the vehicle air source as needed, so that the movement of the medium in the retarder generates corresponding braking force. Generally, the air intake actuating mechanism is realized by valve related products. At present, whether the domestic or foreign retarder related products, the valve actuating mechanism involved adopts proportional regulation control mode, which means that the air intake process of the whole system can be realized according to the established control strategy. This stepless continuous adjustable working mode makes the hydraulic retarder cover almost all working conditions.

[0003] With the development of China's automobile industry, the requirements of the hydraulic retarder, which is the integration of machine, electricity, gas and liquid, are also increasing, such as saving space, realizing higher precision control, etc. For the valve parts of the air intake actuating mechanism, in addition to meeting its function, higher requirements are additionally put forward, such as realizing more accurate pressure control, longer service life, lower cost, etc. The old state valve air intake system cannot solve the oil gas mixture generated under high temperature and high pressure when the product is used for a long time due to its structural characteristics, and once a link of the air intake system fails, the whole mechanism will fail. SUMMARY

[0004] In view of the above problems, the utility model aims at providing a hydraulic retarder pneumatic control system based on solenoid valve, solving the problem of how to reduce cost while improving the stability and service life of the system.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model comprises:

[0006] A hydraulic retarder pneumatic control system based on solenoid valve, comprising a gas source and an oil pool shell, the gas source is connected in series with a pilot valve and a first inlet of a pneumatic valve in turn, and the gas source is also connected with a second inlet of the pneumatic valve; the outlet of the pneumatic valve is connected in series with at least two parallel solenoid valves, the outlets of the solenoid valves are connected in series with quick exhaust valves, and the first outlet of the quick exhaust valve is connected with the oil pool shell.

[0007] Further, it further comprises an exhaust mechanism, the pneumatic valve and the pilot valve are each provided with an exhaust port, and the exhaust port of the pneumatic valve, the exhaust port of the pilot valve and the second outlet of the quick exhaust valve are all connected with the exhaust mechanism.

[0008] Further, the exhaust mechanism is further included, the pilot valve is provided with an exhaust port, the exhaust port of the pilot valve and the second outlet of the quick exhaust valve are communicated with the exhaust mechanism; a first check valve is arranged between the outlet of the electromagnetic valve and the outlet of the pilot valve.

[0009] Further, the exhaust mechanism is further included, the exhaust port of the pilot valve is provided with an exhaust port, the exhaust port of the pilot valve and the second outlet of the quick exhaust valve are communicated with the exhaust mechanism; a first check valve is arranged between the outlet of the electromagnetic valve and the outlet of the pilot valve.

[0010] Preferably, the outlet of the pneumatic valve is connected with two parallel electromagnetic valves in series.

[0011] Preferably, a pressure regulating valve is arranged between the oil pool shell and the exhaust port.

[0012] Preferably, an overflow valve is arranged between the oil pool shell and the exhaust port.

[0013] Preferably, a sequence valve is arranged between the gas source and the pilot valve and between the gas source and the pneumatic valve.

[0014] Preferably, a pressure sensor is arranged on the oil pool shell.

[0015] Further, a control module is further included, and the control module is electrically connected with the pneumatic valve, the pilot valve, the electromagnetic valve, the pressure regulating valve, the overflow valve and the pressure sensor.

[0016] Compared with the prior art, the hydraulic retarder pneumatic control system based on the electromagnetic valve has the following advantages:

[0017] (1) The hydraulic retarder pneumatic control system based on the electromagnetic valve has the following advantages: the reasonable setting of the component structure and the design of the pilot valve make the starting back pressure resistance small and the reversing resistance small, thereby greatly improving the system response time; meanwhile, the electromagnetic valve is arranged behind the pneumatic valve, so that the starting back pressure and the starting power are small, the whole realizes the quick response of the retarder, reduces the working response time, reduces the cost, and improves the stability and the service life of the whole system.

[0018] (2) The hydraulic retarder pneumatic control system based on the electromagnetic valve has the following advantages: the reasonable setting of the component structure and the design of the pilot valve make the starting back pressure resistance small and the reversing resistance small, thereby greatly improving the system response time; meanwhile, the electromagnetic valve is arranged behind the pneumatic valve, so that the starting back pressure and the starting power are small, the whole realizes the quick response of the retarder, reduces the working response time, reduces the cost, and improves the stability and the service life of the whole system.

[0019] (3) The hydraulic retarder pneumatic control system based on the electromagnetic valve has the following advantages: the sequence valve is designed to increase the whole vehicle gas path protection, and the situation that the whole vehicle gas source pressure is insufficient due to the damage of the air inlet execution structure is fundamentally avoided.

[0020] (4) The hydraulic retarder pneumatic control system based on the electromagnetic valve of the utility model, through the design of sequence valve, through the design of fast exhaust valve and first check valve / second check valve, the cavity and air duct pressure are quickly discharged.

[0021] (5) The hydraulic retarder pneumatic control system based on the electromagnetic valve of the utility model, a safety valve is designed, and the safety of the air path function is improved.

[0022] (6) The hydraulic retarder pneumatic control system based on the electromagnetic valve of the utility model, a control module is designed to realize the on-demand, accurate and rapid control of the retarder pressure. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used together with the following specific embodiments to explain the utility model, but do not constitute the limitation to the utility model. In the drawings:

[0024] Figure 1 It is the structural schematic view of the hydraulic retarder pneumatic control system based on the electromagnetic valve of example 1;

[0025] Figure 2 It is the structural schematic view of the hydraulic retarder pneumatic control system based on the electromagnetic valve of example 2;

[0026] Figure 3 It is the structural schematic view of the hydraulic retarder pneumatic control system based on the electromagnetic valve of example 3;

[0027] The various reference signs in the drawings represent:

[0028] 1-gas source, 2-sequence valve, 3-pneumatic valve, 4-pilot valve, 5-electromagnetic valve, 6 first muffler, 7-second muffler, 8-pressure regulating valve, 9-excess flow valve, 10-pressure sensor, 11-fast exhaust valve, 12-oil pool shell, 13-first check valve, 14-second check valve;

[0029] a first air path, b1 second air path, b2 third air path, b3 fourth air path, c fifth air path, d sixth air path, e seventh air path. DETAILED DESCRIPTION

[0030] The utility model is not limited to the following specific embodiments, and any equivalent transformation based on the technical scheme of the application falls within the protection scope of the utility model.

[0031] It should be noted that the directional terms mentioned herein are consistent with the specific directions on the paper or the corresponding directions of the space shown in the drawings; all components and devices in the present application, unless otherwise specified, all use known components and devices in the prior art.

[0032] Embodiment 1

[0033] The embodiment discloses a hydraulic retarder pneumatic control system based on electromagnetic valves, which comprises a gas source 1 and an oil pool shell 12, the gas source 1 is connected in series with a pilot valve 4 and a first inlet of a pneumatic valve 3 in sequence, and the gas source 1 also communicates with a second inlet of the pneumatic valve 3; an outlet of the pneumatic valve 3 is connected in series with at least two parallel electromagnetic valves 5, outlets of the electromagnetic valves 5 are all connected in series with quick exhaust valves 11, and a first outlet of the quick exhaust valve 11 communicates with the oil pool shell 12.

[0034] The gas source 1 is used for supplying the retarder with gas, when the vehicle needs to use the retarder, the pilot valve 4 and all the electromagnetic valves 5 are opened, the gas is input into the first inlet of the pneumatic valve 3 through the pilot valve 4 and the first gas path a, the pneumatic valve 3 is opened, the gas output by the gas source 1 is input into the second inlet of the pneumatic valve 3 through the second gas path b1, and the gas is input into all the electromagnetic valves 5 through the third gas path b2 from the outlet of the pneumatic valve 3, the pressure in the fourth gas path b3 is rapidly increased, the quick exhaust valve 11 is opened, finally, the gas is input into the oil pool shell 12 through the first outlet of the quick exhaust valve 11 and the fifth gas path c, the cavity of the oil pool shell 12 is rapidly pressurized, and the quick response of the retarder is realized; the design of the pilot valve 4 makes the starting back pressure resistance small and the reversing resistance small, and greatly improves the system response time; meanwhile, the electromagnetic valves 5 are located behind the pneumatic valve 3, so that the starting back pressure is small and the starting power is small.

[0035] Specifically, the embodiment further comprises an exhaust mechanism, the pneumatic valve 3 and the pilot valve 4 are both provided with exhaust ports, that is, the pneumatic valve 3 and the pilot valve 4 of the embodiment are both two-position three-way valves, the exhaust port of the pneumatic valve 3, the exhaust port of the pilot valve 4 and the second outlet of the quick exhaust valve 11 all communicate with the exhaust mechanism.

[0036] When the air intake of the retarder is completed, all solenoid valves 5 are closed; when exhaust is needed, the pneumatic valve 3 and the pilot valve 4 are both opened to open the exhaust port of the pneumatic valve 3 and the exhaust port of the pilot valve 4 (i.e. the pneumatic valve 3 and the pilot valve 4 are both switched to the exhaust state), and all solenoid valves 5 are opened at the same time, and the gas is sequentially discharged from the fourth gas path b3, the third gas path b2, and through the exhaust port of the pneumatic valve 3 through the exhaust mechanism, and the gas in the first gas path a is discharged through the exhaust port of the pilot valve 4 through the exhaust mechanism; at this time, the pressure in the fourth gas path b3 is reduced, and the pressure difference in the fast exhaust valve 11 forms a blockage at the inlet thereof, at this time, the pressure in the oil pool shell 12 is reversely introduced into the first outlet of the fast exhaust valve 11 through the fifth gas path c, and then discharged through the second outlet of the fast exhaust valve 11 through the sixth gas path d and through the exhaust mechanism, so as to realize fast exhaust, so as to realize the exit of the retarder from the fast response and reduce the exit working response time.

[0037] The embodiment has two parallel solenoid valves 5, and the solenoid valves 5 are both two-position two-way high-frequency solenoid valves with large diameters, and market existing solenoid valves with diameters of Φ3-Φ6 can be selected.

[0038] The embodiment is provided with a sequence valve 2 between the air source 1 and the pilot valve 4 and between the air source 1 and the pneumatic valve 3.

[0039] The sequence valve 2 increases the protection of the whole vehicle gas path, and fundamentally avoids the situation that the whole vehicle air source pressure is insufficient due to damage of the air intake execution structure.

[0040] The embodiment is provided with a pressure regulating valve 8 between the oil pool shell 12 and the exhaust port.

[0041] When the retarder has realized fast air intake, all solenoid valves are closed, when precise small-range pressure regulation control is needed, two parallel solenoid valves 5 are continuously opened and closed, and the pressure regulating valve 8 adjusts the pressure in the fifth gas path c according to the demand to discharge excess gas, and the three are coordinated with each other to realize system pressure stabilization.

[0042] The embodiment is provided with an overflow valve 9 between the oil pool shell 12 and the exhaust port.

[0043] When the pressure in the oil pool shell 12 is greater than the required pressure, the overflow valve 9 is opened, the gas flows through the overflow valve 9 to discharge excess gas from the exhaust mechanism, and when the pressure in the oil pool shell 12 returns to normal, the overflow valve 9 is closed to improve the safety of the gas path function.

[0044] The embodiment is provided with a pressure sensor 10 on the oil pool shell 12 to monitor the pressure in the oil pool shell 12 in real time.

[0045] The exhaust mechanism of the embodiment includes a first silencer 6 and a second silencer 7, the sixth gas path d outlet is connected to the first silencer 6 of the exhaust mechanism, and the exhaust port of the pilot valve 4 is connected to the second silencer 7 of the exhaust mechanism.

[0046] Embodiment 2

[0047] The embodiment discloses a hydraulic retarder pneumatic control system based on electromagnetic valves, and different from Embodiment 1, the pneumatic valve 3 has no exhaust port, that is, the pneumatic valve 3 is a two-position two-way valve, and the first one-way valve 13 is arranged between the outlet of the electromagnetic valve 5 and the outlet of the pilot valve 4.

[0048] When the retarder air intake is completed, all the electromagnetic valves 5 are closed; when exhaust is needed, the pilot valve 4 is de-energized to open the exhaust port of the pilot valve 4 (that is, the pilot valve 4 is switched to the exhaust state), at this time, the pressure in the seventh gas path e and the first gas path a is higher than the atmospheric pressure, the first one-way valve 13 is opened by overcoming the spring force by the internal pressure, and the internal pressure of the seventh gas path e and the first gas path a is discharged through the exhaust port of the pilot valve 4 and the exhaust mechanism; at this time, the pressure in the fourth gas path b3 is reduced, and the pressure difference formed in the quick exhaust valve 11 blocks the inlet of the quick exhaust valve 11, at this time, the pressure in the oil pool shell 12 reversely enters the first outlet of the quick exhaust valve 11 through the fifth gas path c, and then is discharged through the exhaust mechanism through the second outlet of the quick exhaust valve 11 and the sixth gas path d, so that the quick exhaust is realized, and the quick response of the retarder is realized, and the response time of the exit work is reduced.

[0049] Embodiment 3

[0050] The embodiment discloses a hydraulic retarder pneumatic control system based on electromagnetic valves, and different from Embodiment 1, the second one-way valve 14 is further arranged in parallel with the electromagnetic valve 5, and the exhaust port of the pneumatic valve 3 is communicated with the exhaust mechanism.

[0051] When the retarder air intake is completed, all the electromagnetic valves 5 are closed; when exhaust is needed, the pilot valve 4 is de-energized to open the exhaust port of the pilot valve 4 (that is, the pilot valve 4 is switched to the exhaust state), at this time, the pressure in the seventh gas path e and the first gas path a is higher than the atmospheric pressure, the first one-way valve 13 is opened by overcoming the spring force by the internal pressure, and the internal pressure of the seventh gas path e and the first gas path a is discharged through the exhaust port of the pilot valve 4 and the exhaust mechanism; at this time, the pressure in the fourth gas path b3 is reduced, and the pressure difference formed in the quick exhaust valve 11 blocks the inlet of the quick exhaust valve 11, at this time, the pressure in the oil pool shell 12 reversely enters the first outlet of the quick exhaust valve 11 through the fifth gas path c, and then is discharged through the exhaust mechanism through the second outlet of the quick exhaust valve 11 and the sixth gas path d, so that the quick exhaust is realized, and the quick response of the retarder is realized, and the response time of the exit work is reduced.

[0052] Embodiment 4

[0053] The embodiment discloses a hydraulic retarder pneumatic control system based on a solenoid valve, and further comprises a control module on the basis of the embodiment 1 or the embodiment 2 or the embodiment 3, the control module is electrically connected with the pressure sensor 10 and each valve switch required to be controlled, so that the control of the retarder pressure is accurate, fast and on demand.

[0054] The control module of the embodiment can be a market existing controller.

[0055] The preferred embodiments of the disclosure are described in detail in combination with the drawings, but the disclosure is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the disclosure within the technical concept of the disclosure, and the simple modifications all belong to the protection scope of the disclosure.

[0056] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the disclosure will not further describe various possible combination manners.

[0057] In addition, various different embodiments disclosed in the present scheme can also be combined in any manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as the contents invented by the present disclosure.

Claims

1. A pneumatic control system for a hydraulic retarder based on solenoid valves, comprising a gas source (1) and a sump housing (12), characterized in that, The gas source (1) is connected in series with a pilot valve (4) and a first inlet of a pneumatic valve (3) in sequence, and the gas source (1) is also connected with a second inlet of the pneumatic valve (3). An outlet of the pneumatic valve (3) is connected in series with at least two parallel solenoid valves (5), and an outlet of each solenoid valve (5) is connected in series with a quick-release valve (11), and a first outlet of the quick-release valve (11) is connected with an oil pool shell (12).

2. The solenoid-based hydraulic retarder pneumatic control system according to claim 1, characterized in that, Further comprising an exhaust mechanism, and each of the pneumatic valve (3) and the pilot valve (4) is provided with an exhaust port, and the exhaust port of the pneumatic valve (3), the exhaust port of the pilot valve (4) and a second outlet of the quick-release valve (11) are all connected with the exhaust mechanism.

3. The solenoid-based hydraulic retarder pneumatic control system of claim 1, wherein, Further comprising an exhaust mechanism, and the pilot valve (4) is provided with an exhaust port, and the exhaust port of the pilot valve (4) and a second outlet of the quick-release valve (11) are all connected with the exhaust mechanism. A first one-way valve (13) is arranged between an outlet of the solenoid valve (5) and an outlet of the pilot valve (4).

4. The solenoid-based hydraulic retarder pneumatic control system of claim 1, wherein, Further comprising an exhaust mechanism, and each of the pneumatic valve (3) and the pilot valve (4) is provided with an exhaust port, and the exhaust port of the pneumatic valve (3), the exhaust port of the pilot valve (4) and a second outlet of the quick-release valve (11) are all connected with the exhaust mechanism. Further comprising a second one-way valve (14) connected in parallel with the solenoid valve (5), and the exhaust port of the pneumatic valve (3) is connected with the exhaust mechanism.

5. The solenoid-based hydraulic retarder pneumatic control system according to any one of claims 2-4, characterized in that, An outlet of the pneumatic valve (3) is connected in series with two parallel solenoid valves (5).

6. The solenoid-based hydraulic retarder pneumatic control system according to any one of claims 2-4, characterized in that, A pressure regulating valve (8) is arranged between the oil pool shell (12) and the exhaust port.

7. The solenoid-based hydraulic retarder pneumatic control system of claim 6, wherein, An overflow valve (9) is arranged between the oil pool shell (12) and the exhaust port.

8. The solenoid-based hydraulic retarder pneumatic control system of claim 7, wherein, A sequence valve (2) is arranged between the gas source (1) and the pilot valve (4) and between the gas source (1) and the pneumatic valve (3).

9. The solenoid-based hydraulic retarder pneumatic control system of claim 8, wherein, A pressure sensor (10) is arranged on the oil pool shell (12).

10. The solenoid-based hydraulic retarder pneumatic control system of claim 9, wherein, Further comprising a control module, and the control module is electrically connected with the pneumatic valve (3), the pilot valve (4), the solenoid valve (5), the pressure regulating valve (8), the overflow valve (9) and the pressure sensor (10).

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