CN211623576U

CN211623576U - Connecting structure of intake manifold and EGR (exhaust gas Recirculation) pipe

Info

Publication number: CN211623576U
Application number: CN201922193442.3U
Authority: CN
Inventors: 方立锋; 蔡炳芳; 饶聪超; 沈狄彪
Original assignee: Shentong Technology Group Co Ltd
Current assignee: Shentong Technology Group Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-10-02
Anticipated expiration: 2029-12-09

Abstract

The utility model discloses an air intake manifold and EGR union coupling structure, including air intake manifold and EGR pipe, air intake manifold includes casing and lower casing, the EGR pipe sets up at last casing under and between the casing, EGR outside of tubes side is provided with the insulating layer, the insulating layer cross section is the annular structure, be provided with a plurality of radiator vane on the insulating layer inner wall. The heat-insulating layer cooled by the cooler is radiated by matching the radiating blades with fresh air rushing in during the running of the vehicle, and further an EGR (exhaust gas recirculation) pipe arranged in the heat-insulating layer is subjected to secondary heat radiation, so that the influence of high temperature on the inlet air temperature is reduced, the concentration of nitrogen oxides after gas combustion is reduced, and the environmental protection index of automobile exhaust is effectively improved; the heat insulation layer avoids the influence of high temperature on the plastic intake manifold and the electronic components thereon, prolongs the service life of the intake assembly, simplifies the production process while improving the compactness of the intake manifold assembly, and reduces the manufacturing cost.

Description

Connecting structure of intake manifold and EGR (exhaust gas Recirculation) pipe

Technical Field

The utility model belongs to the technical field of the automobile manufacturing technique and specifically relates to an air intake manifold and EGR union coupling structure is related to.

Background

At present, in order to meet the requirements of emission and low oil consumption, an EGR (exhaust gas recirculation) technology is introduced more and more, an EGR interface is arranged on an air inlet manifold, but an electric control element and a plastic air inlet manifold (the majority of air inlet manifolds in the current market are made of PA 6-G30) are widely applied at present, the temperature resistance of the electric control element and the air inlet manifold is about 130 ℃, the temperature of cooled EGR gas is 130-150 ℃, the temperature is higher than the long-term temperature resistance of the electric control element and the plastic air inlet manifold, and most EGR pipes are of aluminum alloy structures, so that when the air inlet manifold and the EGR pipes are used in an integrated mode, the reliability has great hidden danger. For example, the publication "CN 202348499U" of an intake manifold integrated with an EGR exhaust gas passage disclosed in chinese patent document includes an intake manifold inlet, a pressure stabilizing chamber, an EGR exhaust gas inlet, an EGR exhaust gas outlet, and an EGR exhaust gas outlet, wherein the EGR exhaust gas inlet, the EGR exhaust gas outlet, and the EGR exhaust gas outlet are all disposed in an inner cavity of the intake manifold. The method reduces the links of the waste gas circulating pipe, enables the air inlet resistance to be smaller, and simultaneously improves the compactness of the air inlet structure, but the method can not avoid the influence of the high temperature of the waste gas in the EGR pipe on the air inlet manifold and is easy to cause the condition of overhigh air inlet temperature.

Disclosure of Invention

To plastics air intake manifold among the prior art and go up electrical control element and easily receive EGR pipe temperature to influence and lead to the life-span to reduce, the air intake temperature increases and leads to the problem that exhaust emission is not up to standard, through setting up the insulating layer at the EGR pipe, the heat transfer of separation EGR pipe is to air intake manifold department, and the high temperature resistant ability of insulating layer is further improved to the cooperation high temperature resistant combined material, realizes reducing the temperature influence of EGR pipe to air intake manifold.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an air intake manifold and EGR union coupling structure, includes air intake manifold and EGR pipe, air intake manifold includes casing and lower casing, the EGR pipe sets up at last casing under and between the casing, be provided with the insulating layer on the casing down, the insulating layer cup joints with the EGR pipe, the insulating layer cross section is cyclic annular structure, be provided with a plurality of radiator vane on the insulating layer. The heat insulation layer isolates the EGR pipe from the intake manifold, so that the EGR pipe is prevented from directly contacting the intake manifold, secondary heat dissipation is carried out on the EGR pipe cooled by the cooler by matching fresh air rushing in the running of a vehicle through the heat dissipation blades, the temperature of the EGR pipe and the internal waste gas is effectively reduced, the influence of high temperature on the intake temperature is reduced, the concentration of nitrogen oxides after gas combustion is reduced, and the environmental protection index of automobile exhaust is effectively improved; meanwhile, the influence of high temperature on the plastic intake manifold and electronic components on the plastic intake manifold is avoided, and the service life of the intake assembly is prolonged.

Preferably, the radiating blades are symmetrically arranged along the longitudinal axis of the heat insulation layer, and the radiating blades are horizontally arranged in a layered mode in the vertical direction. The surface of water of the radiating blades is provided with the left radiating blades and the right radiating blades, so that the internal EGR tube can be stably supported, and meanwhile, enough space is formed to reduce the passing resistance of fresh air, so that the fresh air can uniformly contact with all positions of the EGR tube to uniformly radiate the EGR tube.

Preferably, the top of the free end of the radiating blade is of an arc-shaped structure, the connecting line of the arc-shaped structures forms a circumferential structure, and the radius of the circumferential structure is the same as that of the EGR pipe. Cambered surface structural connection forms the circumference structure and can wrap up the formula spacingly to EGR pipe, further improves the fixed of insulating layer to EGR pipe, avoids the EGR pipe to appear becoming flexible and the condition that drops along with the vibration in the vehicle working process.

Preferably, the heat insulation layer and the lower shell are integrally formed, and the heat insulation layer is connected with the upper shell in a clamping mode. The thermal-insulating layer and the lower shell body are of an integrated structure, the connection tightness of the thermal-insulating layer and the intake manifold assembly can be ensured, the compactness of the intake manifold assembly is improved, meanwhile, the production process is simplified, and the manufacturing cost is reduced.

Preferably, the heat insulation layer and the EGR pipe are made of high-temperature-resistant composite plastic, the high-temperature-resistant composite plastic can effectively bear the high temperature of the waste gas in the EGR pipe without softening, deforming and the like, meanwhile, the weight of the automobile body is reduced, and the light-weight design requirement is met.

Preferably, a sealing gasket is arranged between the heat insulation layer and the upper shell. A sealing gasket is arranged between the heat insulation layer and the lower shell so as to avoid the leakage of the intake manifold after the EGR pipe is integrated.

Preferably, the heat insulation layer is of a double-layer structure, a heat resistance layer is arranged between the double-layer structure, and the heat resistance layer is of a detachable structure. The heat insulating layer with the double-layer structure further reduces the influence degree of the heat of the EGR pipe on the intake manifold. The thermal-resistant layer is silica aerogel finished piece, and weight is lighter and have lower coefficient of heat conductivity, can adjust EGR pipe to air intake manifold's influence degree according to service environment, and when the vehicle was used under low temperature environment for a long time, removable thermal-resistant layer carried out temperature compensation through the EGR pipe to air intake manifold, avoided the air intake temperature to hang down and lead to the unsatisfactory and influence combustion effect of air intake atomization degree.

Therefore, the utility model discloses following beneficial effect has: (1) the heat-insulating layer cooled by the cooler is radiated by matching the radiating blades with fresh air rushing in during the running of the vehicle, and further an EGR (exhaust gas recirculation) pipe arranged in the heat-insulating layer is subjected to secondary heat radiation, so that the influence of high temperature on the inlet air temperature is reduced, the concentration of nitrogen oxides after gas combustion is reduced, and the environmental protection index of automobile exhaust is effectively improved; (2) the heat insulation layer avoids the influence of high temperature on the plastic intake manifold and the electronic components on the plastic intake manifold, and the service life of the intake assembly is prolonged; (3) by integrating the EGR pipe into the intake manifold assembly, the compactness of the intake manifold assembly is improved, the production process is simplified, and the manufacturing cost is reduced; (4) the high-temperature-resistant composite plastic can effectively bear the high temperature of the waste gas in the EGR pipe without softening, deforming and other phenomena, and simultaneously reduces the weight of the automobile body, thereby meeting the lightweight design requirement; (6) simple structure, simple manufacturing procedure and low production cost.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

In the figure: 1. the engine comprises an intake manifold, 101, a throttle valve, 11, an upper shell, 12, a lower shell, 2, an EGR pipe, 3, a heat insulation layer, 4, radiating blades, 41, an arc surface structure, 5, a sealing gasket, 6 and a heat resistance layer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

As shown in fig. 1 and 2, a connection structure of an intake manifold 1 and an EGR pipe 2 includes the intake manifold 1 and the EGR pipe 2, a throttle valve 101 is provided on the intake manifold 1, the intake manifold 1 includes an upper housing 11 and a lower housing 12, the EGR pipe 2 is provided between the upper housing 11 and the lower housing 12, a heat insulation layer 3 is provided on the lower housing 12, the heat insulation layer 3 is sleeved with the EGR pipe 2, the cross section of the heat insulation layer 3 is of an annular structure, and a plurality of cooling fins 4 are provided on the heat insulation layer 3. The heat insulation layer isolates the EGR pipe from the intake manifold, so that the EGR pipe is prevented from directly contacting the intake manifold, secondary heat dissipation is carried out on the EGR pipe cooled by the cooler by matching fresh air rushing in the running of a vehicle through the heat dissipation blades, the temperature of the EGR pipe and the internal waste gas is effectively reduced, the influence of high temperature on the intake temperature is reduced, the concentration of nitrogen oxides after gas combustion is reduced, and the environmental protection index of automobile exhaust is effectively improved; meanwhile, the influence of high temperature on the plastic intake manifold and electronic components on the plastic intake manifold is avoided, and the service life of the intake assembly is prolonged. The radiating blades are symmetrically arranged along the longitudinal axis of the heat insulation layer and are horizontally arranged in layers along the vertical direction. The surface of water of the radiating blades is provided with the left radiating blades and the right radiating blades, so that the internal EGR tube can be stably supported, and meanwhile, enough space is formed to reduce the passing resistance of fresh air, so that the fresh air can uniformly contact with all positions of the EGR tube to uniformly radiate the EGR tube. The connecting line of the cambered surface structure 41 forms a circumferential structure, and the radius of the circumferential structure is the same as that of the EGR pipe. Cambered surface structural connection forms the circumference structure and can wrap up the formula spacingly to EGR pipe, further improves the fixed of insulating layer to EGR pipe, avoids the EGR pipe to appear becoming flexible and the condition that drops along with the vibration in the vehicle working process.

The heat insulation layer and the lower shell are integrally formed, and the heat insulation layer is connected with the upper shell in a clamping mode. The thermal-insulating layer and the lower shell body are of an integrated structure, the connection tightness of the thermal-insulating layer and the intake manifold assembly can be ensured, the compactness of the intake manifold assembly is improved, meanwhile, the production process is simplified, and the manufacturing cost is reduced. In the embodiment, the high-temperature resistant composite plastic part adopts chlorinated polyether, the thermal deformation temperature of the high-temperature resistant composite plastic part can reach 210 degrees, and the temperature of exhaust gas in the EGR pipe is usually below 180 degrees, so that the high-temperature resistant composite plastic can effectively bear the high temperature of the exhaust gas in the EGR pipe without softening and deforming, simultaneously reduce the weight of a vehicle body, and meet the lightweight design requirement. And a sealing gasket 5 is arranged between the heat insulation layer and the upper shell. A sealing gasket is arranged between the heat insulation layer and the upper shell so as to avoid the leakage of the intake manifold after the EGR pipe is integrated.

It is worth noting that the heat insulation layer is of a double-layer structure, a heat resistance layer 6 is arranged between the double-layer structure, and the heat resistance layer is of a detachable structure. The heat insulating layer with the double-layer structure further reduces the influence degree of the heat of the EGR pipe on the intake manifold. In the embodiment, the heat-resistant layer is a silicon dioxide aerogel part, the heat conductivity coefficient of the heat-resistant layer is 0.013-0.018 w/m · k at 25 degrees, the density is 180-220 kg/m for cultivation, the heat insulation effect of the material is 2-5 times that of the traditional heat insulation material, the thickness is extremely low, and meanwhile, the flexibility characteristic of the heat-resistant layer is convenient to install in the tubular heat insulation layer, so that a user can adjust the influence degree of the EGR pipe on the air intake manifold according to the use environment of the vehicle.

In addition to the above embodiments, the technical features of the present invention can be re-selected and combined to form new embodiments within the scope of the claims and the specification of the present invention, which are all realized by those skilled in the art without creative efforts, and thus, the embodiments of the present invention which are not described in detail should be regarded as the specific embodiments of the present invention and are within the protection scope of the present invention.

Claims

1. The utility model provides an air intake manifold and EGR manages connection structure, includes air intake manifold (1) and EGR pipe (2), characterized by, air intake manifold (1) includes casing (11) and casing (12) down, EGR pipe (2) set up at last casing (11) and between casing (12) down, be provided with insulating layer (3) down on casing (12), insulating layer (3) cup joint with EGR pipe (2), insulating layer (3) cross section is the loop configuration, be provided with a plurality of radiator vane (4) in insulating layer (3).

2. The connection structure of the intake manifold and the EGR pipe according to claim 1, wherein the heat dissipating fins (4) are symmetrically arranged along the longitudinal axis of the heat insulating layer (3), and the heat dissipating fins (4) are horizontally arranged in layers in the vertical direction.

3. The connecting structure of the intake manifold and the EGR pipe as claimed in claim 2, wherein the top of the free end of the heat dissipating fin (4) is an arc structure (41), the arc structures (41) are combined to form a circumferential structure, and the radius of the circumferential structure is the same as that of the EGR pipe (2).

4. The connection structure of the intake manifold and the EGR pipe as claimed in claim 1, wherein the heat insulating layer (3) is integrally formed with the lower housing (12), and the heat insulating layer (3) is snap-fitted to the upper housing (11).

5. A connection structure of an intake manifold and an EGR pipe according to claim 4, characterized in that a sealing gasket (5) is provided between the insulation layer (3) and the upper housing (11).

6. The connection structure of the intake manifold and the EGR pipe as claimed in any one of claims 1 to 5, wherein the thermal insulation layer (3) and the EGR pipe (2) are both made of high temperature resistant composite plastic.

7. The connection structure of the intake manifold and the EGR pipe as claimed in any one of claims 1 to 5, wherein the heat insulating layer (3) is a double-layer structure, a heat resistant layer (6) is arranged between the double-layer structure, and the heat resistant layer (6) is a detachable structure.