EGR system with heating function

Abstract

The utility model provides an EGR (Exhaust Gas Recirculation) system with a heating function, which relates to an EGR system, and adopts the technical scheme that the EGR system further comprises a heating seat I, the heating seat I is arranged on a mounting seat, a heating cavity I is arranged in the heating seat I, two ends of the heating cavity I are respectively communicated with a liquid inlet I and a liquid outlet I, and the liquid inlet I and the liquid outlet I are communicated with a liquid outlet II; the heating cavity I is adjacent to the air cavity; the liquid inlet end of the heat energy pipe is communicated with a liquid outlet of an engine liquid pump, and a liquid outlet of the heat energy pipe is communicated with the first liquid inlet; the liquid inlet end of the backflow pipe is communicated with the first liquid outlet, and a liquid outlet of the backflow pipe is communicated with a liquid return opening of the engine oil cooler. The ERG valve heating device is simple in structure, capable of automatically heating the ERG valve through heat energy generated by the engine when the temperature is low, and more convenient and efficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to EGR system especially with heating function's EGR system. BACKGROUND

[0002] With the continuous improvement of automobile engine technology and the continuous improvement of automobile exhaust emission requirements, at present, many vehicle engines adopt exhaust gas recirculation technology (abbreviation for EGR), using this technology, the exhaust gas needs to be reduced to the appropriate range before entering the engine and emit a large amount of heat, and then enter the engine through the EGR valve; the EGR valve is an important part of the EGR control system, if the EGR valve is abnormal, it will directly affect the normal work of the EGR system.

[0003] The exhaust gas recirculation system (EGR) will guide the burned exhaust gas into the intake port near the throttle valve, and the exhaust gas often carries a certain amount of gaseous water, when the high temperature exhaust gas contacts the EGR valve with lower temperature, the gaseous water in it will condense into liquid water; when the weather is cold, the temperature is lower than 0°C, after the engine stops, the water vapor in the exhaust gas will condense into ice at the EGR valve, causing the EGR valve to be stuck, when the engine is started again, the frozen EGR valve cannot work normally, the engine cannot enter the EGR working state for a long time, cannot work normally, and is in the limited torque state; in order to thaw, people use hot air gun or hair dryer to heat the EGR valve locally under the premise of safety.

[0004] Using hot air gun or hair dryer to thaw the EGR valve, on the one hand, it takes a long time and has low efficiency, on the other hand, using hot air gun or hair dryer may cause damage to other electronic components due to high temperature, affecting the normal driving of the whole vehicle. INVENTION CONTENTS

[0005] In order to solve the technical problem of EGR valve sticking caused by condensate ice at low temperature in the prior art, the utility model provides an EGR system with heating function, which has simple structure, can automatically heat the ERG valve by using the heat energy generated by the engine at low temperature, and is more convenient and efficient.

[0006] The utility model provides a kind of EGR system with heating function, including EGR valve, mounting seat and connecting pipe, the EGR valve is arranged on the mounting seat, the air inlet of the EGR valve is communicated with the connecting pipe, the air outlet of the EGR valve is communicated with the mounting seat air inlet, air cavity is provided in the mounting seat, and further include:

[0007] A first heating seat is arranged on the mounting seat, and a heating cavity one is arranged in the first heating seat, and the heating cavity one is communicated with a liquid inlet one and a liquid outlet one at two ends respectively, and the heating cavity one is adjacent to the air cavity;

[0008] A heat energy pipe is communicated with the liquid outlet one, and an inlet of the heat energy pipe is communicated with an outlet of a water pump of an engine cooling system, and an outlet of the heat energy pipe is communicated with the liquid inlet one.

[0009] A backflow pipe is communicated with the liquid outlet one at an inlet, and an outlet of the backflow pipe is communicated with a liquid return port of an oil cooler.

[0010] The first heating seat, the heat energy pipe and the backflow pipe are arranged, the cooling liquid flowing through the engine can be connected to the EGR system, the condensed water at the mounting seat is prevented from being frozen at a low temperature, the EGR valve is prevented from being stuck, the structure is simple, and the system is convenient and efficient.

[0011] Further, a second heating seat is arranged on the connecting pipe, the second heating seat comprises a heating cavity two, the heating cavity two comprises a liquid inlet two and a liquid outlet two, the heating cavity two is adjacent to the exhaust outlet of the connecting pipe, and the liquid inlet two is communicated with the liquid outlet one.

[0012] The second heating seat is arranged on the connecting pipe, the air inlet of the system is heated, the condensed water is prevented from being frozen at the position, and the normal work of the system is affected.

[0013] Further, the first heating seat and the mounting seat are integrated.

[0014] Further, the second heating seat and the connecting pipe are integrated.

[0015] Further, the EGR valve is provided with two exhaust outlets, and the mounting seat is correspondingly provided with two exhaust inlets.

[0016] Further, the heating cavity one comprises an avoiding section and a heating section, the avoiding section is communicated with the liquid inlet one, the avoiding section is located at the lower portion of the exhaust inlet of the mounting seat, the avoiding section is inclined and downwardly extended, and the inner diameter of the avoiding section is gradually reduced.

[0017] The avoiding section is arranged, the existing structure of the mounting seat is matched, and the mounting seat is prevented from being greatly changed.

[0018] Further, the average inner diameter of the heating section is D1, the average inner diameter of the avoiding section is D2, and 4*D2

[0019] The inner diameter of the heating section is increased, more cooling liquid can be accommodated, and the heating speed of the system is accelerated.

[0020] Further, the heating cavity two is arranged in parallel with the exhaust outlet.

[0021] The application enhances the heat radiation of the heating cavity two to the air inlet by arranging the heating cavity two in parallel with the air inlet, and accelerates the temperature rise.

[0022] Further, the liquid outlet one and the liquid inlet two are communicated through the communication pipe, the communication pipe, the heat energy pipe and the return pipe are made of nylon formed pipe.

[0023] The nylon formed pipe is used to facilitate bending, realize space avoidance and reduce assembly difficulty.

[0024] Further, the heat energy pipe and the connecting pipe, the return pipe and the mounting seat, the communication pipe and the liquid outlet one, and the communication pipe and the liquid inlet two are communicated through the screw-in straight-through joint.

[0025] The screw-in straight-through joint is used to improve the sealing property of the system and avoid leakage of the cooling liquid flowing through the system.

[0026] From the above technical solution, the application has the following advantages:

[0027] The application provides an EGR system with a heating function, which can connect the cooling liquid flowing through the engine to the EGR system by arranging the heating seat one, the heat energy pipe and the return pipe, avoid freezing of the condensed water at the mounting seat when the temperature is low, cause the EGR valve to be stuck, has a simple structure and is convenient and efficient; the heating seat two is arranged at the connecting pipe to heat the air inlet of the system, avoid freezing of the condensed water at the air inlet and affect the normal work of the system; the avoidance section is arranged to cooperate with the existing structure of the mounting seat and avoid large modification of the mounting seat; the inner diameter of the heating section is increased to accommodate more cooling liquid and accelerate the heating speed of the system; the nylon formed pipe is used to facilitate bending, realize space avoidance and reduce assembly difficulty; the screw-in straight-through joint is used to improve the sealing property of the system and avoid leakage of the cooling liquid flowing through the system. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the application, the following will briefly introduce the drawings needed to be used in the description, and obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the drawings.

[0029] Figure 1 The application provides a structure schematic view of the specific embodiment.

[0030] Figure 2 Structure diagram of the mounting seat in the specific embodiment of the utility model Figure 1 .

[0031] Figure 3 Structure diagram of the mounting seat in the specific embodiment of the utility model Figure 2 .

[0032] Figure 4 Structure diagram of the connecting pipe in the specific embodiment of the utility model Figure 1 .

[0033] Figure 5 Structure diagram of the connecting pipe in the specific embodiment of the utility model Figure 2 .

[0034] In the figure, 1, heat energy pipe; 2, connecting pipe; 201, liquid outlet two; 202, liquid inlet two; 203, waste gas outlet; 204, heating cavity two; 3, EGR valve; 4, mounting seat; 401, liquid inlet one; 402, liquid outlet one; 403, waste gas inlet; 404, heating cavity one; 4041, avoiding section; 4042, heating section; 5, communicating pipe; 6, backflow pipe; 7, screwed straight through joint. Specific embodiment

[0035] In order to make the purpose, characteristics and advantages of the utility model more obvious and easy to understand, the technical scheme in the utility model will be described clearly and completely in combination with the drawings in the specific embodiment below. Obviously, the following described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the patent, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of the patent protection. Specific embodiment one

[0037] As Figures 2 to 3As shown, the specific embodiment provides an EGR system with heating function, which comprises an EGR valve 3, a mounting seat 4, a connecting pipe 2, a heating seat one, a backflow pipe 6 and a thermal energy pipe 1; the EGR valve 3 is arranged on the mounting seat 4, the air inlet of the EGR valve 3 is communicated with the exhaust gas outlet 203 of the connecting pipe 2, the connecting pipe 2 is used for connecting the engine exhaust gas, the air outlet of the EGR valve 3 is communicated with the air inlet of the mounting seat 4, the mounting seat 4 is provided with an air cavity, the mounting seat 4 is used for returning part of the engine exhaust gas to the engine air inlet, the heating seat one is arranged on the mounting seat 4, the heating seat one is provided with a heating cavity one 404, the heating cavity one 404 is respectively communicated with a liquid inlet one 401 and a liquid outlet one 402 at two ends, and the heating cavity one 404 is adjacent to the air cavity; the liquid inlet end of the thermal energy pipe 1 is communicated with the water pump outlet of the engine cooling system, the liquid outlet of the thermal energy pipe 1 is communicated with the liquid inlet one 401, the thermal energy pipe 1 connects the cooling liquid in the cooling system which is heated after flowing through the engine into the system, the liquid inlet end of the backflow pipe 6 is communicated with the liquid outlet one 402, and the liquid outlet of the backflow pipe 6 is communicated with the liquid return port of the oil cooler, so that the cooling liquid is returned to the cooling system after energy exchange.

[0038] The specific embodiment sets the heating seat one, the thermal energy pipe 1 and the backflow pipe 6, so that the cooling liquid flowing through the engine can be automatically connected to the EGR system after the whole vehicle is started, the heat energy in the cooling liquid is utilized to automatically melt the frozen channel, the EGR valve 3 is prevented from being stuck after long-time shutdown in winter, and the engine can work normally.

[0039] As shown in Figs. 1 and 2, Figure 2 and Figure 3 Further, in the specific embodiment, the heating seat one and the mounting seat 4 are a cast integrated structure, the EGR valve 3 is provided with two air outlets, the mounting seat 4 is correspondingly provided with two exhaust gas inlets 403, specifically, the mounting seat 4 is provided with two mounting surfaces, and the mounting seat 4 is connected with the EGR valve 3 through bolts; in order to adapt the structure of the heating cavity two 204 to the mounting seat 4 and reduce the structure improvement of the mounting seat 4, the heating cavity one 404 comprises an avoiding section 4041 and a heating section 4042, the avoiding section 4041 is communicated with the liquid inlet one 401, the avoiding section 4041 is located at the lower part of one exhaust gas inlet 403 of the mounting seat 4, the avoiding section 4041 extends downwardly and obliquely, and the inner diameter of the avoiding section 4041 gradually decreases; in order to ensure that the heating cavity one 404 has sufficient volume and accelerate the heating speed, preferably, the average inner diameter of the heating section 4042 is D1, the average inner diameter of the avoiding section 4041 is D2, and 4*D2

[0040] As shown in Figs. 1 and 2, Figure 1As shown in the specific embodiment, the heat energy pipe 1 and the return pipe 6 are both made of nylon molded pipe; the nylon molded pipe has certain flexibility and durability, can be appropriately bent, can avoid space, and is convenient for assembly; further, the heat energy pipe 1 and the connecting pipe 2, the return pipe 6 and the mounting seat 4 are all communicated through the screw-in straight-through joint 7, and the screw-in straight-through joint 7 is used to improve the sealing performance of the system and avoid leakage of the cooling liquid flowing through the system.

[0041] The heating process of the EGR system with heating function is as follows:

[0042] After the whole vehicle is started, the water pump pumps the cooling liquid into the heat energy pipe 1, the cooling liquid enters the heating cavity one 404, the mounting seat 4 and the EGR valve 3 are heated, and the ice at the place is melted. Specific embodiment two

[0044] In the prior art, when the engine works in extremely cold weather, if it is idled for a long time or in the process of deceleration and cut-off, the condensed water will freeze the air inlet channel of the EGR valve 3; in order to ensure the normal work of the engine, the EGR system with heating function is provided in the specific embodiment, as shown in Figure 1 、 Figure 4 and Figure 5 , the EGR system with heating function includes an EGR valve 3, a mounting seat 4, a connecting pipe 2, a heating seat one, a heating seat two, a return pipe 6 and a heat energy pipe 1; the EGR valve 3 is arranged on the mounting seat 4, the air inlet of the EGR valve 3 is communicated with the exhaust outlet 203 of the connecting pipe 2, the connecting pipe 2 is used to connect the engine exhaust, the air outlet of the EGR valve 3 is communicated with the air inlet of the mounting seat 4, the mounting seat 4 is provided with an air cavity, and the mounting seat 4 is used to return part of the engine exhaust to the engine air inlet; the heating seat one is arranged on the mounting seat 4, the heating seat one is provided with a heating cavity one 404, the heating cavity one 404 is respectively communicated with a liquid inlet one 401 and a liquid outlet one 402 at two ends, the heating cavity one 404 is adjacent to the air cavity, the heating seat two is arranged on the connecting pipe 2, the heating seat two includes a heating cavity two 204, the heating cavity two 204 includes a liquid inlet two 202 and a liquid outlet two 201, the heating cavity two 204 is adjacent to the exhaust outlet 203 of the connecting pipe 2, and the liquid inlet two 202 is communicated with the liquid outlet one 402 through a communication pipe 5; after the above arrangement, the gas entering the EGR valve 3 can be heated when the ambient temperature is lower than the set temperature, and the condensed water freezing the gas channel of the EGR valve 3 is avoided; the liquid inlet end of the heat energy pipe 1 is communicated with the outlet of the water pump of the engine cooling system, the liquid outlet of the heat energy pipe 1 is communicated with the liquid inlet one 401, the heat energy pipe 1 connects the cooling liquid in the cooling system, which is heated after flowing through the engine, into the system, the liquid inlet end of the return pipe 6 is communicated with the liquid outlet one 402, and the liquid outlet of the return pipe 6 is communicated with the liquid return port of the oil cooler, so that the cooling liquid is returned to the cooling system after energy exchange.

[0045] The embodiment sets the heating seat one, the heating seat two, the heat energy pipe 1 and the backflow pipe 6, and after the whole vehicle starts, the cooling liquid flowing through the engine can be automatically connected to the EGR system, the heat energy in the cooling liquid is utilized to automatically melt the frozen channel, the EGR valve 3 is prevented from being stuck in winter after a long time of shutdown, a long time of idling operation of the engine or during deceleration and cut-off, and the engine can work normally.

[0046] As shown in Figure 5 Further, in the embodiment, the heating seat two and the connecting pipe 2 are integrated, the heating seat two is arranged at the exhaust outlet 203 of the connecting pipe 2, and the heating cavity two 204 is arranged in parallel with the exhaust outlet 203, so that the heating cavity two 204 enhances the heat radiation effect on the air inlet and accelerates the temperature rise.

[0047] In the embodiment, the communication pipe 5 and the liquid outlet one 402 and the communication pipe 5 and the liquid inlet two 202 are communicated through the screw-in straight-through joint 7.

[0048] The connection forms of the heating seat one structure, the heat energy pipe 1 and the backflow pipe 6 in the system are the same as those in the first embodiment, and will not be repeated.

[0049] The heating process of the EGR system with the heating function is as follows:

[0050] After the whole vehicle starts, the water pump pumps the cooling liquid into the heat energy pipe 1, the heat energy pipe 1 enters the heating cavity two 204 to exchange heat energy, the temperature of the connecting pipe 2 is raised, the ice at the position is melted, then the connecting pipe 2 enters the heating cavity one 404 through the communication pipe 5, the mounting seat 4 and the EGR valve 3 are heated, and the ice at the position is melted.

[0051] From the above embodiment, it can be seen that the utility model has the following beneficial effects:

[0052] 1. By setting the heating seat one, the heat energy pipe 1 and the backflow pipe 6, the cooling liquid flowing through the engine can be connected to the EGR system, the condensed water at the mounting seat 4 is prevented from being frozen in a low temperature environment, the EGR valve 3 is prevented from being stuck, the structure is simple, and the system is convenient and efficient;

[0053] 2. By setting the heating seat two at the connecting pipe 2, the air inlet of the system can be heated, the condensed water is prevented from being frozen at the position, and the normal work of the system is affected;

[0054] 3. By setting the avoiding section 4041, the mounting seat 4 can be matched with the existing structure, and the mounting seat 4 is prevented from being greatly changed;

[0055] 4. By increasing the inner diameter of the heating section 4042, more cooling liquid can be accommodated, and the heating speed of the system is accelerated;

[0056] 5. By using nylon forming pipe, it is convenient to bend, realize space avoidance and reduce assembly difficulty;

[0057] 6. By using screw-in straight-through joint 7, the sealing performance of the system is improved, and leakage of the cooling liquid flowing through the system is avoided.

[0058] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will accord with the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An EGR system with heating function, comprising an EGR valve (3), a mounting seat (4) and a connecting pipe (2), the EGR valve (3) is arranged on the mounting seat (4), the gas inlet of the EGR valve (3) is communicated with the connecting pipe (2), the gas outlet of the EGR valve (3) is communicated with the gas inlet of the mounting seat (4), and a gas cavity is arranged in the mounting seat (4), characterized in that, Also include: The heating seat one, heating seat one is arranged on the mounting seat (4), the heating cavity one (404) is arranged in the heating seat one, the heating cavity one (404) two ends are communicated with liquid inlet one (401) and liquid outlet one (402) respectively, the heating cavity one (404) is adjacent with the air cavity; Heat energy pipe (1), the liquid inlet end of heat energy pipe (1) is communicated with the water pump outlet of engine cooling system, the liquid outlet of heat energy pipe (1) is communicated with the liquid inlet one (401); The return pipe (6), the liquid inlet end of return pipe (6) is communicated with the liquid outlet one (402), the liquid outlet of return pipe (6) is communicated with the liquid return port of oil cooler.

2. The EGR system with heating function according to claim 1, wherein Also include heating seat two, the heating seat two is arranged on the connecting pipe (2), the heating cavity two (204) is included in the heating seat two, the heating cavity two (204) includes liquid inlet two (202) and liquid outlet two (201), the heating cavity two (204) is adjacent with the exhaust outlet (203) of connecting pipe (2), the liquid inlet two (202) is communicated with the liquid outlet one (402).

3. The EGR system with heating function according to claim 2, wherein The heating seat one and the mounting seat (4) are integrated structure.

4. The EGR system with heating function according to claim 3, wherein The heating seat two and the connecting pipe (2) are integrated structure.

5. The EGR system with heating function according to claim 3, wherein The EGR valve (3) is provided with two gas outlets, and the mounting seat (4) is provided with two exhaust inlets (403) correspondingly.

6. The EGR system with heating function according to claim 5, wherein The heating cavity one (404) includes avoidance section (4041) and heating section (4042), the avoidance section (4041) is communicated with the liquid inlet one (401), the avoidance section (4041) is located in the lower portion of one exhaust inlet (403) of the mounting seat (4), the avoidance section (4041) extends downwardly, the inner diameter of the avoidance section (4041) gradually decreases.

7. The EGR system with heating function according to claim 6, characterized in that: The average inner diameter of the heating section (4042) is D1, the average inner diameter of the avoidance section (4041) is D2, 4*D2<D1.

8. The EGR system with heating function according to claim 4, wherein The heating seat two is arranged at the exhaust outlet (203) of the connecting pipe (2), and the heating cavity two (204) is arranged in parallel with the exhaust outlet (203).

9. The EGR system with heating function according to claim 2, wherein The liquid outlet one (402) and the liquid inlet two (202) are communicated through the communication pipe (5), the communication pipe (5), the heat energy pipe (1) and the return pipe (6) are made of nylon formed pipe.

10. The EGR system with heating function according to claim 9, wherein The heat energy pipe (1) and the connecting pipe (2), the return pipe (6) and the mounting seat (4), the communication pipe (5) and the liquid outlet one (402), the communication pipe (5) and the liquid inlet two (202) are communicated through the spin-in straight-through joint (7).

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