• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to an exhaust manifold structure, In particular, first to fourth runners are formed to be connected to each exhaust port of the engine, respectively, and exhaust runners are configured such that the runners are gathered at the upper side of the mixing pipe so that the hot exhaust gas passing through the respective runners is combined in the mixing pipe. In the fold, It characterized in that to form a concave and convex concave and convex continuously formed on the inlet portion of the respective runners are gathered together to attenuate thermal deformation due to thermal stress in the inlet portion, The hot exhaust gas passing through each runner is dispersed in several protrusions without being concentrated in one place of the pit so that it can effectively reduce excessive stress and thermal deformation, and if the high and low temperatures are repeated, the maximum compression and tensile stress The present invention relates to an exhaust manifold structure capable of preventing damage to the exhaust manifold due to the generation of fatigue stress at the same position, because the generated position is moved.
    公开号:KR20030048166A
    申请号:KR1020010077998
    申请日:2001-12-11
    公开日:2003-06-19
    发明作者:김명호
    申请人:현대자동차주식회사；
    IPC主号:
    专利说明:

    Structure of exhaust manifold
    [7] The present invention relates to an exhaust manifold structure, in particular, the hot exhaust gas passing through each runner is dispersed in a plurality of protrusions without being concentrated in one place of the pit, and can effectively reduce excessive stress generation and thermal deformation, The present invention relates to an exhaust manifold structure that prevents damage to the exhaust manifold due to fatigue stress at the same location since the location of maximum compression and tensile stress is moved when repeated and low temperature is repeated. .
    [8] The exhaust manifold has a function of guiding the high temperature exhaust gas discharged from the engine to the exhaust pipe side. The exhaust manifold is mainly manufactured as a casting, and the exhaust manifold is operated as the high temperature and high stress is repeatedly applied as the exhaust gas is continuously discharged. Cracks due to thermal fatigue are frequently generated at the inlet portions of the folds.
    [9] 1 shows a conventional exhaust manifold,
    [10] A flange 5 is formed on the exhaust side of the engine block as bolts, and first to fourth runners 1 to 4 are formed on the flange 5 to move the exhaust gas, respectively. (1 to 4) are formed to assemble on the mixing pipe (7) side.
    [11] Wherein each runner (1-4) is gathered in one place, that is, the upper surface of the mixing pipe (7) is formed in the inlet port (8) so that the exhaust gases passing through each runner (1-4) mixing pipe (7) It is guided to move to the side.
    [12] The exhaust manifold configured as described above functions to transfer the high temperature exhaust gas discharged through the exhaust port of the engine to the exhaust pipe side, and according to the on / off state of the engine as the high temperature exhaust gas is continuously discharged. Since the manifold is repeatedly heated and cooled, the high temperature and high stress are repeatedly applied, which causes cracking due to thermal fatigue.
    [13] Particularly, in the case of the inlet part 8, which is a part where each runner 1 to 4 is gathered in one place, thermal fatigue occurs because other parts are exposed to the high-temperature exhaust gas supplied through all the runners 1 to 4. Problems appearing faster than they are occurring.
    [14] To solve this problem
    [15] 1. The method of forming the slit 6 in the longitudinal direction on the flange 5 of the exhaust manifold (additional processing cost is required, the flange portion is distorted by the slit portion, the problem of leakage of exhaust gas occurs) has exist),
    [16] 2. The method of forming the flesh thickness of the ridge part 8 which is the part where each runner 1-4 gathers in one place thicker than another part,
    [17] 3. A method of increasing the radius of curvature R2 of the inlet portion 8 as shown in Figure 2,
    [18] 4. Method of changing the components of the material constituting the exhaust manifold to increase the heat resistance of the design,
    [19] Etc. are performed.
    [20] The manifold 8 of the exhaust manifold has a structure that is basically weak because all the runners 1 to 4 are gathered in one place, because the flange 5 of the exhaust manifold is connected to the head of the engine block by bolts. This is because the radius of curvature R1 of the inlet part 8 is essential in order to remove the interference when assembling the bolt, and the radius of curvature R2 of the inlet part 8a, which is the third method, is shown in FIG. The increasing method as described above can suppress the abrupt shape change of the exhaust manifold and also suppress the occurrence of excessive thermal stress.
    [21] However, as the performance of the engine is gradually developed to satisfy the high power, high fuel efficiency, and low exhaust level, the radius of curvature of the inlet part 8 is increased because the exhaust manifold must be exposed to a higher temperature condition. There is a limit to increase sufficiently, and at the present time to promote the lightening of the engine, the thickness of the casting is inevitably thin, so the radius of curvature of the ridge is exposed to high heat and high stress, which causes cracking due to thermal fatigue. There is a problem that cannot be prevented,
    [22] In addition, when the inlet portion 8 has a convex shape, the maximum compressive stress is generated at the same position again at the low temperature due to the engine off when the tensile stress generation position generated at the maximum in the inlet portion is caused by high temperature exhaust gas. There was a problem that thermal fatigue breakdown was promoted to the same site (the spout).
    [23] Accordingly, the present invention for solving the above problems constitutes an uneven portion formed by continuously forming a protrusion and a recess in a ridge portion, which is a portion where the exhaust gas passing through each runner is gathered in one place, and thus the high temperature passing through each runner. Exhaust gas is not concentrated in one place of the pit but distributed to several protrusions to effectively reduce excessive stress and thermal deformation, and when the high temperature and low temperature are repeated, the position where the maximum compression and tensile stress occurs is moved. It is an object of the present invention to provide an exhaust manifold structure that can prevent damage to the exhaust manifold due to fatigue stress at the same position.
    [24] The present invention for achieving the above object,
    [25] First to fourth runners are formed to be connected to respective exhaust ports of the engine, respectively, and the exhaust manifolds are configured such that the runners are gathered together at the upper side of the mixing pipe so that the hot exhaust gas passing through each runner is combined in the mixing pipe. To
    [26] The runners are formed in the concave and convex contiguous portions formed continuously on the inlet portion, which is a portion where the runners are gathered together, so as to reduce thermal deformation due to thermal stress in the inlet portion.
    [27] The concave and convex portions may be formed by forming blocks at predetermined intervals at portions where the first runner and the fourth runner are gathered together, and forming concaves between the blocks, wherein the concave and convex portions may include at least two concave portions. Characterized in that the block portion is formed continuously.
    [1] 1 is a view showing a conventional exhaust manifold structure.
    [2] Figure 2 shows a conventional improved exhaust manifold structure.
    [3] 3 is a view showing an exhaust manifold structure of the present invention.
    [4] ※ Explanation of code for main part of drawing
    [5] 1 ~ 4: Runner 5: Flange
    [6] 10: mouth portion 11: uneven portion
    [28] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings of FIG. 3, and the same components as in the related art are denoted by the same reference numerals to avoid repeated descriptions.
    [29] The biggest feature of the present invention,
    [30] The biggest feature is that the concave and convex portions 11 formed by forming the concave portion K3 and the convex portions k1 and k2 in succession are formed in the convex portion 10, which is a portion where each runner 1 to 4 is gathered in one place. to be.
    [31] As shown in FIG. 3, the uneven portion 11 protrudes the blocks K1 and K2 at a predetermined interval to a portion where the first runner 1 and the second runner 4 are gathered together, and the block ( The recesses K3 are formed between the portions K1 and K2, and the number of the blocks and the recesses may be increased to two or more as necessary.
    [32] When the concave-convex portion 11 is formed on the inlet 10 as described above, the hot exhaust gas supplied from each of the runners 1 to 4 is dispersed in a plurality of convex k1 and k2 portions. As it comes into contact, it is possible to expect the effect that the maximum stress due to the heat applied to the entire fitting section 10 is sharply lowered.
    [33] Also, even if the high and low temperatures are repeated, the portion where the tensile stress occurs due to heat and the location where the compressive stress occurs due to cooling are not concentrated in one place. It is possible to minimize the crack phenomenon.
    [34] If the concave-convex portion 11 is formed in the inlet 10 as described above, the damping effect that can effectively reduce excessive stress generation and thermal deformation can be expected as well as the concave-convex portion in the inlet 10 By applying (11), it is possible to prevent cracking of the inlet portion 10, and thus it is not necessary to process a separate slit in the flange 5, so that the manufacturing process can be further reduced, and also gas leakage phenomenon. This can be prevented in advance.
    [35] In addition, since the flesh thickness of the inlet portion 10 can be formed in the same manner as other parts, it is possible to reduce the weight of the entire exhaust manifold and to use an expensive material having strong heat resistance to the material of the exhaust manifold. This can lower the overall exhaust manifold price.
    [36] As described above, the present invention constitutes an uneven portion formed by continuously forming protrusions and recesses in a ridge portion, which is a portion where the exhaust gas passing through each runner is gathered in one place, so that the hot exhaust gas passing through each runner is It is not concentrated in one place of the pit but distributed to several protrusions, which can effectively reduce excessive stress and thermal deformation, and when the high temperature and low temperature are repeated, the position where the maximum compression and tensile stress occurs is moved. The effect of providing an exhaust manifold structure capable of preventing damage to the exhaust manifold due to fatigue stress at the same position can be expected.
    权利要求:
    Claims (3)
    [1" claim-type="Currently amended] First to fourth runners are formed to be connected to respective exhaust ports of the engine, respectively, and the exhaust manifolds are configured such that the runners are gathered together at the upper side of the mixing pipe so that the hot exhaust gas passing through each runner is combined in the mixing pipe. To
    The exhaust manifold structure, characterized in that to form a concave and convex concave and convex continuously formed on the inlet portion of the respective runners are gathered together to attenuate thermal deformation due to thermal stress in the inlet.
    [2" claim-type="Currently amended] The method of claim 1,
    The uneven part is an exhaust manifold structure, characterized in that the first runner and the fourth runner together form a block at a predetermined interval, and the concave formed between the block formed.
    [3" claim-type="Currently amended] The method according to claim 1 or 2,
    The uneven portion exhaust manifold structure, characterized in that at least two concave and the block portion is formed continuously.
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    同族专利:
    公开号 | 公开日
    KR100482871B1|2005-04-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2001-12-11|Application filed by 현대자동차주식회사
    2001-12-11|Priority to KR10-2001-0077998A
    2003-06-19|Publication of KR20030048166A
    2005-04-14|Application granted
    2005-04-14|Publication of KR100482871B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR10-2001-0077998A|KR100482871B1|2001-12-11|2001-12-11|Structure of exhaust manifold|
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