Air inlet mixer and engine system

Abstract

The utility model discloses an air inlet mixer and an engine system, and belongs to the technical field of engines. According to the air inlet mixer and the engine system, air is introduced into the first channel through the mixing inlet, the fuel gas supply device introduces fuel gas into the first channel through the first air hole, the fuel gas and the air are mixed through the first-stage core body, and the mixed fuel gas and the mixed air enter the second channel; the arrangement of the first contraction section can form negative pressure, so that EGR waste gas introduced into the EGR cavity is sucked into the second channel through the EGR guide-in channel, mixed gas of fuel gas and air is fully mixed with the EGR waste gas, and the purposes of improving the gas mixing efficiency and mixing uniformity and improving the EGR rate are achieved. Due to the arrangement of the expansion section, the gas inlet efficiency and the gas mixing efficiency of EGR waste gas can be improved; and the temperature of the gas in the shell can be adjusted by introducing the temperature adjusting medium into the temperature adjusting cavity, so that the icing fault of the gas inlet mixer is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to an engine technical field especially, and it relates to an air inlet mixer and engine system. BACKGROUND

[0002] In the gas engine, need through air inlet mixer with gas, fresh air and EGR exhaust gas carry out mixing after, again enter the gas engine in combustion. The inside of the existing air inlet mixer is equipped with the core body, to carry out mixing with gas, fresh air and EGR exhaust gas by the core body, but this core body structure is relatively simple, and the air inlet structure only has the conventional small hole, not only the mixing efficiency is low, and the mixing uniformity is low, and EGR rate is low the problem that gas and EGR exhaust gas are pressed by fresh air easily appears. Meanwhile, the existing air inlet mixer can easily appear the icing failure, influence gas engine normal work. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of air inlet mixer and engine system, not only can improve gas mixing efficiency and mixing uniformity, and improve EGR rate, also can avoid that air inlet mixer appears icing failure.

[0004] To achieve the above-mentioned purpose, the following technical solutions are provided:

[0005] Air inlet mixer, comprising:

[0006] Shell, the shell is equipped with mixing chamber and is communicated with the mixing inlet and the mixing outlet of mixing chamber, the shell wall of the shell is equipped with temperature adjusting chamber that is mutually isolated with the mixing chamber, the shell is also equipped with temperature adjusting inlet and temperature adjusting outlet that are communicated with the temperature adjusting chamber;

[0007] Primary core, the primary core is fixedly arranged in the mixing chamber, the primary core is equipped with first passageway and first air hole communicated with the first passageway, and the first air hole is used to communicate with gas supply device;The first passageway includes first contraction section, along the flow direction of airflow in the first passageway, the cross-sectional area of the first contraction section gradually decreases;

[0008] Secondary core, the secondary core is fixedly arranged in the mixing chamber and is located downstream of the primary core, the secondary core is equipped with second passageway, and the mixing inlet and the mixing outlet are communicated with the first passageway and the second passageway;The second passageway includes expansion section, along the flow direction of airflow in the second passageway, the cross-sectional area of the expansion section gradually increases;

[0009] EGR chamber is arranged between the primary core, the secondary core and the shell, and EGR introduction channel is formed between the primary core and the secondary core, and the EGR chamber is communicated with the second passageway through the EGR introduction channel.

[0010] As a preferred technical solution of the above-mentioned air inlet mixer, the temperature adjusting cavity is in a ring structure, and the ring structure is arranged outside the mixing cavity.

[0011] As a preferred technical solution of the above-mentioned air inlet mixer, the temperature adjusting cavity comprises:

[0012] A first sub-cavity is arranged corresponding to the primary core;

[0013] A second sub-cavity is arranged corresponding to the secondary core;

[0014] One end of the first sub-cavity is communicated with the temperature adjusting inlet, the other end of the first sub-cavity is communicated with one end of the second sub-cavity, and the other end of the second sub-cavity is communicated with the temperature adjusting outlet.

[0015] As a preferred technical solution of the above-mentioned air inlet mixer, the secondary core is provided with an EGR hole away from one end of the primary core, and the EGR cavity is further communicated with the second channel through the EGR hole.

[0016] As a preferred technical solution of the above-mentioned air inlet mixer, the axis of the EGR hole is parallel to the axis of the second channel.

[0017] As a preferred technical solution of the above-mentioned air inlet mixer, the EGR hole is provided with a plurality of EGR holes, and the plurality of EGR holes are arranged at intervals along the circumference of the secondary core.

[0018] As a preferred technical solution of the above-mentioned air inlet mixer, the mixing inlet is used for being communicated with the air outlet of the supercharger;

[0019] The air inlet mixer further comprises a bypass valve, the bypass valve comprises a first valve port and a second valve port, the first valve port is communicated with the mixing inlet, and the second valve port is used for being communicated with the air inlet of the supercharger.

[0020] As a preferred technical solution of the above-mentioned air inlet mixer, the air inlet mixer further comprises a first air inlet valve, an air inlet valve port of the first air inlet valve is communicated with the first valve port, and an air outlet valve port of the first air inlet valve is communicated with the mixing inlet; and / or,

[0021] The air inlet mixer further comprises a second air inlet valve, and an air outlet valve port of the second air inlet valve is communicated with the EGR cavity.

[0022] As a preferred technical solution for the above-mentioned intake mixer, the housing further includes an EGR connection structure, the EGR connection structure having an EGR connection channel, the EGR connection channel having a trumpet-shaped structure, and the small-diameter end of the EGR connection channel communicating with the EGR cavity.

[0023] As a preferred technical solution of the above-mentioned intake mixer, the second channel further includes a second contraction section, and the cross-sectional area of ​​the second contraction section gradually decreases along the airflow direction in the second channel;

[0024] The end of the second contraction section with a larger cross-sectional area is positioned opposite to the first channel, and the end of the second contraction section with a smaller cross-sectional area is connected to the end of the expansion section with a smaller cross-sectional area.

[0025] One end of the primary core is inserted into the end of the second contraction section with the larger cross-sectional area.

[0026] As a preferred embodiment of the above-mentioned intake mixer, a notch is provided at the end of the second contraction section with a larger cross-sectional area, and the EGR chamber is connected to the second channel through the notch.

[0027] To achieve the above objectives, an engine system is also provided, including an engine body and an intake mixer as described in any of the preceding claims, wherein the EGR exhaust port of the engine body is in communication with the EGR chamber, and the intake port of the engine body is in communication with the mixing outlet.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0029] This invention relates to an intake mixer and engine system. Air enters the first channel through a mixing inlet, and a gas supply device introduces gas into the first channel through a first air hole. The gas and air are first mixed by a primary core, and then the mixed gas and air enter the second channel. The first contraction section creates a negative pressure, drawing the EGR exhaust gas from the EGR chamber into the second channel through the EGR inlet channel. This allows for thorough mixing of the gas and air mixture with the EGR exhaust gas, improving gas mixing efficiency and uniformity, and increasing the EGR rate. Simultaneously, the expansion section improves the intake efficiency of the EGR exhaust gas and reduces NO combustion. X It reduces emissions and improves gas mixing efficiency, thereby optimizing the combustion performance of the engine body; at the same time, by introducing a temperature regulating medium into the temperature regulating chamber, the temperature of the gas inside the housing can be adjusted, preventing icing failure of the intake air mixer; the temperature regulating medium enters the temperature regulating chamber from the temperature regulating inlet and exits the temperature regulating chamber through the temperature regulating outlet, realizing the circulation of the temperature regulating medium and achieving better temperature regulation effect. Attached Figure Description

[0030] Figure 1 It is the first structure schematic view of air inlet mixer in the embodiment of the utility model;

[0031] Figure 2 It is the second structure schematic view of air inlet mixer in the embodiment of the utility model;

[0032] Figure 3 It is the sectional view of air inlet mixer in the embodiment of the utility model;

[0033] Figure 4 It is the structure schematic view of primary core body and secondary core body in the embodiment of the utility model;

[0034] Figure 5 It is the sectional view of primary core body and secondary core body in the embodiment of the utility model;

[0035] Figure 6 It is the structure schematic view of shell in the embodiment of the utility model;

[0036] Figure 7 It is the first structure schematic view of primary core body in the embodiment of the utility model;

[0037] Figure 8 It is the second structure schematic view of primary core body in the embodiment of the utility model;

[0038] Figure 9 It is the first structure schematic view of secondary core body in the embodiment of the utility model;

[0039] Figure 10 It is the second structure schematic view of secondary core body in the embodiment of the utility model.

[0040] Reference signs:

[0041] 1, shell; 11, mixing cavity; 12, mixing import; 13, mixing export; 14, temperature regulating import; 15, temperature regulating export; 16, EGR cavity; 17, EGR introduction channel; 18, EGR connecting structure; 181, EGR connecting channel; 191, air inlet cavity; 192, air inlet connector; 2, primary core body; 21, first channel; 211, first contraction section; 212, throat section; 22, first air hole; 3, secondary core body; 31, second channel; 311, second contraction section; 312, expansion section; 32, EGR air hole; 33, notch; 4, bypass valve; 41, first valve port; 42, second valve port; 5, first air inlet valve; 6, second air inlet valve; 7, air inlet pipeline; 8, air outlet pipeline. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0044] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0045] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0046] In the description of the present application, it should also be noted that, unless otherwise specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0049] like Figures 1 to 10 As shown, this embodiment provides an intake mixer and an engine system. The engine system includes an engine body and an intake mixer. The intake mixer includes a housing 1, a primary core 2, and a secondary core 3. The housing 1 has a mixing chamber 11 and a mixing inlet 12 and a mixing outlet 13, both of which are connected to the mixing chamber 11. The housing wall of the housing 1 has a temperature regulating chamber isolated from the mixing chamber 11. The housing 1 also has a temperature regulating inlet 14 and a temperature regulating outlet 15, both of which are connected to the temperature regulating chamber. The primary core 2 is fixed in the mixing chamber 11. The primary core 2 has a first channel 21 and a first vent 22 connected to the first channel 21. The first vent 22 is used to connect to a gas supply device. The first channel 21 includes a first contraction section. 211, along the airflow direction in the first channel 21, the cross-sectional area of ​​the first contraction section 211 gradually decreases; the secondary core 3 is fixed in the mixing chamber 11 and located downstream of the primary core 2. The secondary core 3 is provided with a second channel 31, and the mixing inlet 12 and the mixing outlet 13 are connected through the first channel 21 and the second channel 31; the second channel 31 includes an expansion section 312, and along the airflow direction in the second channel 31, the cross-sectional area of ​​the expansion section 312 gradually increases; an EGR chamber 16 is provided between the primary core 2, the secondary core 3 and the shell 1, and an EGR inlet channel 17 is formed between the primary core 2 and the secondary core 3. The EGR chamber 16 is connected to the second channel 31 through the EGR inlet channel 17.

[0050] In this embodiment, the mixing inlet 12 is used to introduce air into the first channel 21, and the first air vent 22 is used to introduce combustion gas into the first channel 21. The EGR exhaust port of the engine body is connected to the EGR chamber 16, and the air intake port of the engine body is connected to the mixing outlet 13.

[0051] The air enters the first channel 21 through the mixing inlet 12, and the fuel gas enters the first channel 21 through the first gas hole 22 by the gas pump or other gas feeding device, so that the fuel gas and the air are mixed by the first core 2 first, and then the mixed gas enters the second channel 31. The first contraction section 211 can form negative pressure, so that the EGR exhaust gas in the EGR cavity 16 is sucked into the second channel 31 through the EGR introduction channel 17, so that the mixed gas of the fuel gas and the air is fully mixed with the EGR exhaust gas, the gas mixing efficiency and the mixing uniformity are improved, and the EGR rate is improved. At the same time, the expansion section 312 can improve the air intake efficiency of the EGR exhaust gas, reduce the combustion NO X emission, and improve the gas mixing efficiency, so as to optimize the combustion performance of the engine body.

[0052] At the same time, the temperature adjusting inlet 14 can introduce the temperature adjusting medium into the temperature adjusting cavity, and the temperature adjusting outlet 15 can discharge the temperature adjusting medium in the temperature adjusting cavity. By introducing the temperature adjusting medium into the temperature adjusting cavity, the temperature of the gas in the shell 1 can be adjusted to avoid the freezing failure of the air inlet mixer. The temperature adjusting medium is introduced into the temperature adjusting cavity from the temperature adjusting inlet 14 and discharged from the temperature adjusting outlet 15, so that the circulation of the temperature adjusting medium is realized, and the temperature adjusting effect is better.

[0053] It should be noted that the cross section of the first contraction section 211 is perpendicular to the flow direction of the gas in the first channel 21, and the cross section of the expansion section 312 is perpendicular to the flow direction of the gas in the second channel 31.

[0054] Optionally, the temperature adjusting cavity has a ring structure, and the ring structure is arranged outside the mixing cavity 11. In other words, the temperature adjusting cavity is arranged outside the mixing cavity 11, so that the gas in the mixing cavity 11 can be uniformly heated, and the effect of avoiding the freezing failure of the air inlet mixer is better.

[0055] Optionally, the temperature adjusting cavity includes a first sub-cavity and a second sub-cavity, the first sub-cavity is arranged corresponding to the first core 2, and the second sub-cavity is arranged corresponding to the second core 3. One end of the first sub-cavity is communicated with the temperature adjusting inlet 14, the other end of the first sub-cavity is communicated with one end of the second sub-cavity, and the other end of the second sub-cavity is communicated with the temperature adjusting outlet 15. Because the temperature of the fresh air is lower than that of the EGR exhaust gas, the high-temperature temperature adjusting medium is first introduced into the first sub-cavity through the temperature adjusting inlet 14, so that the air and the fuel gas in the first channel 21 are heated first, and then the temperature adjusting medium is introduced into the second sub-cavity, and the mixed gas in the second channel 31 is heated again, which is beneficial to improve the heating efficiency of the air and the effect of avoiding the freezing failure of the air inlet mixer is better.

[0056] Optionally, the engine system also includes a turbocharger, with the mixing inlet 12 connected to the turbocharger's outlet, thereby providing sufficient air through the turbocharger.

[0057] Furthermore, such as Figure 1 As shown, the intake mixer also includes a bypass valve 4, which includes a first valve port 41 and a second valve port 42. The first valve port 41 is connected to the mixing inlet 12, and the second valve port 42 is connected to the intake port of the turbocharger. It should be noted that when the engine stops rotating, the turbocharger will continue to run at high speed for a period of time due to inertia. During this time, the compressed gas flows back to the front of the turbocharger through the bypass valve 4, forming a circulating air path, which can prevent turbocharger squealing, surging, and other problems caused by poor airflow.

[0058] Optionally, the intake mixer also includes a first intake valve 5. The outlet of the turbocharger and the first valve port 41 are both connected to the intake valve port of the first intake valve 5. The outlet of the first intake valve 5 is connected to the mixing inlet 12, thereby facilitating the control of the flow rate and velocity of the air entering the first channel 21 through the first intake valve 5, so as to improve the working efficiency of the engine body.

[0059] Optionally, the intake mixer also includes a second intake valve 6, the intake port of which is connected to the EGR exhaust port of the engine body, and the exhaust port of which is connected to the EGR chamber 16. This allows the flow rate and velocity of the EGR exhaust gas entering the EGR chamber 16 to be controlled by the second intake valve 6, thereby improving the working efficiency of the engine body.

[0060] Optionally, the intake mixer also includes an intake pipe 7, with the intake port of the first intake valve 5 and the first valve port 41 of the bypass valve 4 both connected to one end of the intake pipe 7, and the other end of the intake pipe 7 connected to the outlet of the turbocharger. Connecting the bypass valve 4 and the first intake valve 5 to the outlet of the turbocharger via the intake pipe 7 facilitates the overall layout of the engine system.

[0061] Specifically, the intake pipe 7 is a three-way pipe, which includes a first port, a second port and a third port. The first port is connected to the intake valve port of the first intake valve 5, the second port is connected to the first valve port 41 of the bypass valve 4, and the third port is connected to the exhaust port of the turbocharger.

[0062] Optionally, the intake mixer also includes an exhaust pipe 8, one end of which is connected to the mixing outlet 13, and the other end of which is connected to the air intake of the engine body. Connecting the mixing outlet 13 and the air intake of the engine body via the exhaust pipe 8 facilitates the overall layout of the engine system.

[0063] Optionally, such as Figure 2 and Figure 6As shown, the shell 1 further comprises an EGR connecting structure 18, which is provided with an EGR connecting passage 181 in a trumpet structure, the small-diameter end of the EGR connecting passage 181 being in communication with the EGR cavity 16, so as to improve the flow rate of the EGR exhaust gas into the EGR cavity 16, so that the EGR exhaust gas in the EGR cavity 16 can enter the second passage 31 faster and more, improving the intake efficiency of the EGR exhaust gas and the EGR rate.

[0064] Exemplarily, the small-diameter end of the EGR connecting passage 181 is connected with the intake valve port of the second intake valve 6, and the large-diameter end of the EGR connecting passage 181 is connected with the EGR exhaust port of the engine body through a pipeline.

[0065] Optionally, the EGR connecting structure 18 is integrally formed with the shell 1, which is better in process. Of course, the EGR connecting structure 18 can also be separately provided and fixedly connected with the shell 1.

[0066] Optionally, as shown in Figure 3 , Figure 9 and Figure 10 , the end of the secondary core body 3 away from the primary core body 2 is provided with an EGR gas hole 32, and the EGR cavity 16 is further in communication with the second passage 31 through the EGR gas hole 32, so that a part of the EGR exhaust gas can enter the tail of the second passage 31 (the tail of the second passage 31 is the end of the second passage 31 opposite to the mixing outlet 13) through the EGR gas hole 32, so that this part of the EGR exhaust gas is mixed with the mixed gas of fuel gas, air and EGR exhaust gas again in the tail of the second passage 31, further improving the EGR rate and the intake mixing uniformity.

[0067] It should be noted that when the mixing outlet 13 is in communication with the gas outlet pipeline 8, the EGR exhaust gas entering the second passage 31 through the EGR gas hole 32 can also be further mixed with the mixed gas of fuel gas, air and EGR exhaust gas in the gas outlet pipeline 8, further improving the EGR rate and the intake mixing uniformity.

[0068] Optionally, the axis of the EGR gas hole 32 is parallel to the axis of the second passage 31, so that the EGR exhaust gas can be introduced into the second passage 31 through the EGR gas hole 32, and the flow rate of the mixed gas in the second passage 31 can also be avoided.

[0069] Optionally, the EGR gas hole 32 is provided with a plurality of EGR gas holes 32, which are arranged at intervals along the circumference of the secondary core body 3, and the plurality of EGR gas holes 32 can introduce the EGR exhaust gas in the EGR cavity 16 into the second passage 31, so as to improve the mixing uniformity of the mixed gas.

[0070] Optionally, as shown in Figure 3As shown, the first gas hole 22 is provided with a plurality of first gas holes 22, and the plurality of first gas holes 22 are arranged along the circumference of the primary core 2. The plurality of first gas holes 22 can improve the gas intake efficiency and improve the gas mixing uniformity.

[0071] Optionally, as shown in Figure 7 and Figure 8 , the first gas hole 22 is provided with a plurality of first gas holes 22, and the plurality of first gas holes 22 are arranged along the circumference of the primary core 2. The plurality of first gas holes 22 can improve the gas intake efficiency and improve the gas mixing uniformity.

[0072] Specifically, the plurality of first gas holes 22 are arranged at the end of the first contraction section 211 with a smaller cross-sectional area, which is beneficial to improve the gas intake efficiency and improve the gas mixing uniformity.

[0073] Optionally, as shown in Figure 5 and Figure 9 , the second channel 31 further includes a second contraction section 311, and the cross-sectional area of the second contraction section 311 gradually decreases along the flow direction of the gas flow in the second channel 31. The cross section of the second contraction section 311 is perpendicular to the flow direction of the gas flow in the second channel 31. The end of the second contraction section 311 with a larger cross-sectional area is arranged opposite to the other end of the throat section 212, and the end of the second contraction section 311 with a smaller cross-sectional area is connected to the end of the expansion section 312 with a smaller cross-sectional area. Through the above arrangement, the gas flow can be smoother, and the EGR exhaust gas intake efficiency can be further improved. Not only the EGR rate can be improved, but also the gas mixing efficiency can be improved.

[0074] Optionally, one end of the primary core 2 is inserted into the end of the second contraction section 311 with a larger cross-sectional area, so that the gas flow discharged from the first channel 21 and the EGR exhaust gas can enter the second channel 31 more smoothly, and the EGR rate and the gas mixing efficiency can be improved.

[0075] Optionally, as shown in Figure 4 and Figure 9As shown, the end of the second contraction section 311 with a larger cross-sectional area is provided with a notch 33. The EGR chamber 16 is connected to the second channel 31 through the notch 33, which can increase the flow area of ​​the EGR inlet channel 17 so that more EGR exhaust gas can enter the second channel 31 and improve the intake efficiency of EGR exhaust gas.

[0076] For example, multiple notches 33 are provided, and the multiple notches 33 are arranged at intervals along the circumference of the secondary core 3 at the end of the second contraction section 311 with a larger cross-sectional area, which has the function of improving the intake efficiency of EGR exhaust gas and the uniformity of gas mixing.

[0077] Optionally, such as Figure 7 to 10 As shown, multiple first channels 21 are provided, and any two first channels 21 are not interconnected. Further, multiple second channels 31 are provided, and each of the multiple second channels 31 corresponds one-to-one with a single first channel 21. Furthermore, the multiple second contraction sections 311 are not interconnected, and the smaller cross-sectional areas of the expansion sections 312 of the multiple second channels 31 are not interconnected, while the larger cross-sectional areas of the expansion sections 312 of the multiple second channels 31 are interconnected to form a single channel. In other words, the multiple second channels 31 of the secondary core 3 are arranged radially and intersectingly, further improving the EGR exhaust gas intake efficiency and the intake mixing efficiency.

[0078] For example, three of each of the first channel 21 and the second channel 31 are provided.

[0079] For example, the working principle of the intake mixer in this embodiment is as follows:

[0080] When the engine system is working, air is compressed by the turbocharger. The air discharged from the turbocharger's outlet is introduced into the first channel 21 through the intake pipe 7, the first intake valve 5, and the mixing inlet 12. The gas supply device introduces gas into the first channel 21 through the first air port 22 via an air pump or other gas delivery components. The gas and air are first mixed by the first-stage core 2, and the mixed gas and air then enter the second channel 31.

[0081] The EGR exhaust gas discharged from the EGR exhaust port of the engine body is introduced into the EGR chamber 16 through the EGR connection channel 181 and the second intake valve 6. The first contraction section 211 can create a negative pressure to draw the EGR exhaust gas introduced into the EGR chamber 16 into the second channel 31 through the EGR inlet channel 17, thereby allowing the mixture of gas and air to be fully mixed with the EGR exhaust gas.

[0082] When the engine stops rotating, the turbocharger will continue to run at high speed for a period of time due to inertia. At this time, the compressed gas flows back to the front of the turbocharger through the bypass valve 4 to prevent problems such as turbocharger squealing and surging caused by poor airflow.

[0083] It should be noted that the above only describes the preferred embodiments of the present application and the principles of the technology applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. An intake mixer, characterized in that, include: The housing has a mixing chamber and a mixing inlet and a mixing outlet that are both connected to the mixing chamber. The housing wall has a temperature regulating chamber that is isolated from the mixing chamber. The housing also has a temperature regulating inlet and a temperature regulating outlet that are both connected to the temperature regulating chamber. A primary core is fixed inside the mixing chamber. The primary core has a first channel and a first air hole communicating with the first channel. The first air hole is used to communicate with a gas supply device. The first channel includes a first contraction section. Along the airflow direction in the first channel, the cross-sectional area of ​​the first contraction section gradually decreases. A secondary core is fixed inside the mixing chamber and located downstream of the primary core. The secondary core has a second channel, and the mixing inlet and the mixing outlet are connected through the first channel and the second channel. The second channel includes an expansion section, and the cross-sectional area of ​​the expansion section gradually increases along the airflow direction inside the second channel. An EGR cavity is provided between the primary core, the secondary core and the housing, and an EGR inlet channel is formed between the primary core and the secondary core. The EGR cavity is connected to the second channel through the EGR inlet channel.

2. The intake mixer according to claim 1, characterized in that, The temperature regulating cavity has a ring-shaped structure, which is sleeved on the outside of the mixing cavity.

3. The intake mixer according to claim 2, characterized in that, The temperature-regulating cavity includes: The first sub-cavity is configured correspondingly to the primary core. The second sub-cavity is configured correspondingly to the secondary core. One end of the first sub-cavity is connected to the temperature control inlet, the other end of the first sub-cavity is connected to one end of the second sub-cavity, and the other end of the second sub-cavity is connected to the temperature control outlet.

4. The intake mixer according to claim 1, characterized in that, The secondary core has an EGR vent at the end away from the primary core, and the EGR cavity is also connected to the second channel through the EGR vent.

5. The intake mixer according to claim 4, characterized in that, The axis of the EGR vent is parallel to the axis of the second channel.

6. The intake mixer according to claim 4, characterized in that, The EGR vents are provided in multiple locations, and the multiple EGR vents are arranged at intervals along the circumference of the secondary core.

7. The intake mixer according to claim 1, characterized in that, The mixing inlet is used to connect with the outlet of the turbocharger; The intake mixer also includes a bypass valve, which has a first valve port and a second valve port. The first valve port is connected to the mixing inlet, and the second valve port is connected to the intake port of the turbocharger.

8. The intake mixer according to claim 7, characterized in that, The intake mixer further includes a first intake valve, the intake port of which is connected to both the outlet of the turbocharger and the first valve port, and the outlet port of which is connected to the mixing inlet; and / or, The intake mixer also includes a second intake valve, the outlet of which is connected to the EGR chamber.

9. The intake mixer according to claim 1, characterized in that, The housing also includes an EGR connection structure, which has an EGR connection channel. The EGR connection channel has a funnel-shaped structure, and the small-diameter end of the EGR connection channel is connected to the EGR cavity.

10. The intake mixer according to any one of claims 1-9, characterized in that, The second channel also includes a second contraction section, and the cross-sectional area of ​​the second contraction section gradually decreases along the airflow direction within the second channel; The end of the second contraction section with a larger cross-sectional area is positioned opposite to the first channel, and the end of the second contraction section with a smaller cross-sectional area is connected to the end of the expansion section with a smaller cross-sectional area. One end of the primary core is inserted into the end of the second contraction section with the larger cross-sectional area.

11. The intake mixer according to claim 10, characterized in that, The second contraction section has a notch at the end with the larger cross-sectional area, and the EGR cavity is connected to the second channel through the notch.

12. An engine system, characterized in that, It includes an engine body and an intake mixer as described in any one of claims 1-11, wherein the EGR exhaust port of the engine body is connected to the EGR chamber, and the intake port of the engine body is connected to the mixing outlet.

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