JPS626106B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a suction pipe device for a 4- to 6-cylinder in-line internal combustion engine, which has a collective housing, from which two pipes are arranged opposite to each other in substantially one plane. , There is a separate suction pipe of almost the same length,
The individual suction pipe has a curved intermediate portion located so as to overlap each other and a connecting end portion connectable to the intake port of the engine, in which case the connecting end portions are parallel to each other in substantially the same direction, and are arranged in a cluster. It relates to the suction pipe arrangement as described above, which extends substantially at right angles to the end emerging from the housing, with the collecting housing being arranged substantially centrally and laterally of the connecting end portion.

A known suction pipe arrangement of this type for a six-cylinder internal combustion engine with a triple carburetor arrangement (U.S. Pat.
No. 2,862,490), the intermediate section of a single suction pipe essentially consists of a straight line and an oblique section, each substantially parallel to one another, which sections are interconnected by bends with a small radius of curvature.
In this design, the gas flow or mixture flow in the single suction pipe is hindered by the swirl, so that particularly advantageous efficiency and torque values with respect to the engine speed cannot be achieved. Furthermore, the individual suction pipes are relatively short, which also has disadvantages in the torque characteristics and the efficiency characteristics.

The present invention provides a suction pipe arrangement of the structure mentioned at the outset, in which the individual suction pipes have a sufficiently large length and a relatively large radius of curvature, without substantially increasing the space requirements of the suction pipe arrangement. The challenge is to provide the following.

This object is achieved according to the invention by the fact that the intermediate parts of the individual suction pipes are each arranged in pairs at least partially in a plane such that, in the vicinity of the connecting end part, This is solved by intersecting the columns in parallel with the axes assumed and starting from these axes and fanning out towards the collective housing.

The construction of the suction pipe arrangement according to the invention allows for a very small space requirement for the suction pipe arrangement and good vibration behavior in the single suction pipe and with it good torque and efficiency characteristics of the engine. The suction pipe arrangement according to the invention is particularly suitable for fuel-injected internal combustion engines of the Otto cycle or diesel cycle, but also for carburetor-type Otto cycle internal combustion engines.

Advantageous embodiments of the invention are described in the exemplary embodiments, in which case a particularly compact and space-saving construction is obtained by the features of claim 2 and 3 and in which case The characteristics result in a configuration that is particularly well suited for internal combustion engines arranged with a lateral slope, in which case the vertical arrangement of the collecting housing results in a particularly small lateral space requirement for the suction pipe arrangement. .

Claims 5, 6 and 7 describe advantageous embodiments of the invention with a collective housing located above the connecting end part, and claims 8 to 12 describe the suction pipe arrangement itself. It also shows an advantageous shape for processing the core used in manufacturing this suction pipe device and an optimal shape for casting.

The special design of the intake pipe arrangement for a four-cylinder serial internal combustion engine according to claims 13 to 15 results in good vibration behavior in the single intake pipe and with it good torque and efficiency characteristics of the engine. This is because pressure wave transitions between the mutually opposing single suction pipes are prevented by the opposing oblique arrangement of the single suction pipes.

The single suction pipe according to claim 14 then has a relatively large length and radius of curvature without substantially increasing the space requirements of the suction pipe arrangement, so that the single suction pipe can The flow and vibration behavior within the tube is further improved. The features of claim 15 result in an advantageous flow transition of the single suction pipe to its connecting end section.

The present invention will be explained in detail below with reference to embodiments of the drawings.

1 to 3 show a suction pipe system 1 (not shown) for a six-cylinder injection-in-line internal combustion engine of the Otto cycle, which comprises one collective housing 2 and six cylinders. Individual suction pipe 3, 4, 5,
6, 7, and 8. The individual suction pipes emerge from the collective housing 2 parallel to each other in a plane 9 and opposite each other in pairs and are of the same length. The individual suction pipe has intermediate portions 10, 11, 12, which are curved and positioned so as to overlap each other.
13, 14, 15, and connectable end portions 16, 1 to an inlet of an internal combustion engine (not shown)
7, 18, 19, 20, 21, the connecting end portions of which extend parallel to each other in substantially the same direction, and each of the individual suction pipes 3 to 8 extending from the collective housing 2 Axis line 23 of the connecting end part,
It extends in a plane 22 parallel to 24,25. In other words, the connection end portions 16, 17, 18, 1
The plane on which the axes 9, 20, and 21 are located is the axis 23,
It is parallel to 24 and 25. Starting from the collective housing 2, the internal cross-sectional area of the individual suction pipes 3 to 8 decreases towards the connecting end parts 16 to 21. The collective housing 2 is arranged to extend transversely and at right angles to the direction along the flange end face 32 from the center of the row of connecting end sections, ie from a position between the connecting end sections 18 and 19. Individual suction pipe 3
The curved intermediate portions 10 to 15 of 8 to 8 are arranged in pairs, ie intermediate portions 10 and 15, 1 respectively.
1 and 14, 12 and 13, respectively, are arranged as a pair in such a way that at least a part of the intermediate parts lies in a common plane 26, 27, 28, i.e. intermediate parts 10 and 15 lie in a plane 28, intermediate part 11 and 14 is arranged in a plane 27, and the intermediate parts 12 and 13 are arranged in a plane 26, and each two of the planes 26, 27, 28 are arranged in the vicinity of the connecting end parts 16, 17, 18, 19, 20, 21. an assumed axis 2 parallel to the plane connecting the rows of end sections, i.e. the axes of each connecting end section;
9, 30, and 31, said surfaces fan out toward the collective housing 2 approximately from this imaginary axis.

Single suction pipe 3 starting from the collective housing 2
The ends of 8 are aligned with the assumed axes 29 and 31.
have different distances from each other. Assumed axis 2
The two individual suction pipes 5 and 6 starting from the collective housing 2 furthest away from 9 to 31 are connected to the two central connecting end parts 18 or 19. The two individual suction pipes 3 and 8 starting from the collective housing 2 closest to the assumed axis 29 to 31 are connected to the two outer connecting end parts 16 or 2.
1 is connected. Between the single suction pipes 3 and 5 and 6 and 8, the two single suction pipes 4 and 7 starting from the collective housing 2 are connected to the central connecting end part 1.
8 and 19 and connecting end portions 17 and 20 located between outer connecting end portions 16 and 21. The curved intermediate portions 12 and 13 of the single suction pipes 5 and 6 starting from the collective housing 2 furthest from the assumed axis 29 to 31 and of the single suction pipes 4 and 7 adjacent to these single suction pipes. The curved intermediate portions 11 and 14 are directed first towards the connecting end portions 16 to 21, then overlapping and finally towards the respective connecting end portions 18 and 19,
Or, it curves toward 17 and 20 in a substantially S-shape.

Single suction pipe 3 starting from the collective housing 2
The plane 9 in which the ends of the two individual suction pipes 3 and 8 are located closest to the assumed axis 29 to 31 is where the curved intermediate parts 10 and 15 of the two individual suction pipes 3 and 8 starting from the collective housing 2 are located. side 2
8, and is placed almost at right angles to the 8. former side 9
forms an acute angle γ with the flange surface 32 of the flange 33 of the connecting end parts 16 to 21, which acute angle opens towards the partial connecting ends 16 to 21 and towards the collective housing 2. The connecting end parts 16 to 21 thus have a corresponding curvature from the assumed axis 29 to 31 towards the flange 33.

The collecting housing 2 has a slightly curved end wall 34 located in a plane approximately parallel to the ends of the individual suction pipes 3 to 8 starting from it and two mutually parallel ends at right angles to this end wall. It has a side wall 35. The upper end of end wall 34 transitions into wall 36 . Furthermore, the collective housing 2 has a back wall 37 whose upper part is arranged approximately parallel to the end wall 34 .
An opening 38 is provided in the upper part of the rear wall 37, to which an air supply conduit (not shown) can be connected. An injection valve fitting 39 is molded onto the connecting end portions 16 to 21.

Due to the above-described configuration of the collective housing 2 and the configuration of the individual suction pipes connected thereto and having the connecting end portions 16 to 21, it is possible to obtain single suction pipes of the same length with a relatively large radius of curvature and a large length. Can be stored within a narrow airspace. The suction pipe device 1 can be manufactured as a single casting. For this reason, the suction pipe arrangement is designed in such a way that it can be demolded relatively easily, simply and freely by undercutting. The individual suction pipes 3 to 8 have a common wall section in their mutually overlapping region, and the single suction pipes 5 and 6, which open into the central connecting end sections 18 and 19, also have a common wall section with the collective housing 2. has. This achieves not only great stiffness but also good formability and saves material.

Furthermore, the suction pipe arrangement 1 can be constructed in such a way that, for casting, apart from the necessary core, one mold with only two mold parts and one slide is sufficient. The individual suction pipes 3 to 8 are partially interconnected by walls 40 in the region of the mold parting plane. This wall provides a high rigidity of the suction pipe arrangement and avoids costly cleaning operations.

4 to 10 show modified embodiments of the suction pipe arrangement described above. This suction pipe device 1
01 is one collective housing 102 and six individual suction pipes 103, 104, 105, 106, 10
7,108. The individual suction pipes start from the collective housing 102 parallel to each other in one plane 109 and in pairs opposite each other and are of the same length.
The individual suction pipes have curved intermediate portions 110, 111, 112, 113, 11 located so as to overlap each other.
4, 115 and connectable with an intake port of an internal combustion engine (not shown);
118, 119, 120, 121, the connecting end portions of which extend parallel to each other in approximately the same direction and in approximately one parallel plane 122, the collective housing 10
It extends approximately perpendicular to the end starting from 2. The inner cross-section of the individual suction pipes 103 to 108 is circular and tapers from the collective housing 102 towards the connecting end parts 116 to 121. The collective housing 102 is arranged substantially side by side over the connecting end portions 116 to 121. In that case, the curved intermediate portions 110 to 115 of the individual suction pipes 103 to 108 extend as follows. That is, the connecting end portion 116 to 1
The two individual suction pipes 105 and 106 departing from the collective housing 102 on the side 21 - their connecting end parts 118 and 119 connect the connecting end parts 116 to 1
Starting from the middle of the row of connecting end sections 118, 117, 116 or 11, the sequence of connecting end sections starting from the center of the row of connecting end sections 118, 117, 116 or 11 is located directly in line with the center of the column of 21.
9, 120, 121 extend in a manner that corresponds to the sequence of exit of the individual suction pipes 103 to 108 from the collective housing 102. This means that both single suction pipes 105 and 106 starting from the collective housing 102 on the side of the connecting end parts 116 to 121 have both central connecting end parts 1
18 and 119 belong to the connecting end portion 11
6 to 121 on the side opposite the collective housing 1
Both single suction pipes 103 and 10 starting from 02
8 means that the two outer connecting end parts 116 and 121 are assigned. Between the single suction pipes 103 and 105 or 106 and 108, the two single suction pipes 104 and 107 starting from the collective housing 102 are connected to the central and outer connecting end portions 11.
6 and 118 or 119 and 121 to the connecting end portions 117 and 120. Curved intermediate portions 112 and 11 of individual suction pipes 105 and 106 connected with central connecting end portions 118 and 119
3 is curved firstly away from the connecting end portions 118 and 119 and then towards this connecting end portion.

a first portion 123 of each intermediate portion 110 to 115 of each pair of individual suction pipes 103 to 108;
124, 125, 126, 127, 128 are located approximately in one plane 129, which plane
Together with the planes 122 of 16 to 121 they form an angle α open in the direction of the connecting end portion. The plane 129 intersects one or several axes 129', which are assumed parallel to the rows of the connecting end parts 116 to 121. The angle α is the angle α of the single suction pipe pair 105, 106; 104, 107;
03,108 becomes increasingly large as the distance of the starting point increases. Individual suction pipe 103 to 10
The second portions 130, 131, 132, 133, 134, 1 of the middle portions 110 to 115 of 8, respectively.
35 lies approximately in a plane 136 which, together with planes 122 of the connecting end portions 116 to 121, forms an angle β in the direction away from the collective housing.
form. The angle β is the connecting end portions 118, 119, 117, 120 from the center of the row of connecting end portions.
or 116, 121 increases as the distance increases, whereby both single suction pipes 103 and 108 with outer connecting end portions 116 and 121
The surface 136 on which the second portions 130, 135 of the curved intermediate portions 110 and 115 are located will be substantially parallel to the central longitudinal surface 137 of the collective housing 102.

The collective housing 102 is the collective housing 10
Single suction pipes 103 to 108 starting from 2
It has a slightly curved upper side 138 lying in a plane substantially parallel to the ends of the upper side and two side walls 139 and 140 parallel to each other at right angles to this upper side. Located towards the connecting end portions 116-121. At the end of the collective housing 102, the upper side 138
extends downwards in a bend 141 and transitions into a low end wall 142 , which transitions by another bend 143 into an oblique bottom 144 . The oblique bottom 144 faces toward the connecting end portions 116 to 121 and lies approximately parallel to the surface 129 in which the central connecting end portions 118 and 11
9 and the first portions 125 and 126 of the intermediate portions 112 and 113 of the individual suction pipes 105 and 106
is located. The collective housing 102 has a wall 145 at its end opposite the connecting end portions 116 to 121, which wall extends from the outer connecting end portion 116.
and 121 of the intermediate sections 110 and 115 of the individual suction pipes 103 and 108;
28. The wall 145 is provided with an opening 146 to which an air supply conduit (not shown) can be connected. Opening 1
46 and a hole 148 for an additional air connection pipe, not shown, in the extension 147 of the collective housing.
is provided, and this hole is provided in the collective housing 10.
2 opens into a recess 149 at the lowest point. A hole 151 for a starter nozzle (not shown) is arranged at the bottom 150 of the recess 149.

The connecting end portions 161 to 121 are flange 15
2, the flange is connected to the collective housing 102
interconnected in the extent of its half on the side. Each connecting end portion 116 to 121 has a flange 152 in the wall on the side of the oblique bottom 144.
A connecting hole 153 diagonal in the direction of
54, into which a respective injection nozzle (not shown) can be inserted.

Due to this configuration of the collective housing 102 and the configuration of the individual suction pipes 103 to 108 with connecting end portions 116 to 121 connected thereto,
A single suction pipe of the same length with a relatively large radius of curvature and a large length can be accommodated within a small air space.

The suction pipe device 101 can be manufactured as a single cast part. For this reason, the suction pipe device
It is designed in such a way that it can be demolded relatively easily and simply as well as freely by the undercut.

The individual suction pipes 103 to 108 have common wall portions 155, 156 in the mutually overlapping region;
The two individual suction pipes 105 and 106 which open into the central connecting end parts 118 and 119 have a common wall part 157 with the collective housing 102. This achieves not only great stiffness but also good moldability.

Furthermore, the suction pipe device 101 has the following functions for casting:
It can be constructed such that one mold with only two mold parts and two slides is sufficient. The individual suction pipes 103 to 108 are partially interconnected by walls 158, 159, 160 in the area of the mold parting plane. Each of these walls 158 is connected to the side walls 139, 140 of the collective housing 102;
A single suction pipe 1 starting from the collective housing 102 closest to the connecting end portions 116 to 121
05 or 106 and the first portion 125 or 126 of the curved intermediate portion 112 or 113. The wall 158 is the collective housing 102
It is located substantially parallel to the slanted bottom 144 of. Another wall 159, 160 that is a continuation of wall 158
extends between the individual suction pipes 103 to 105 and 106 to 108, corresponding to their respective large angle α in relation to the connecting end portions 116 and 121, as far as the rib 161 and the main portion 16 of the rib.
2 connects the individual suction pipes 103 to 108 in the range where their bent intermediate portions 110 to 115 transition to connecting end portions 116 to 121. The ribs 161 are located in the mold parting plane and extend in a plane parallel to the oblique bottom 144 of the collective housing 102. The rib 161 is offset in the region of the collective housing 102 parallel to the direction of the opening 146 of the collective housing 102 , in which case the transition section 163 connects the offset section 164 of the rib 161 with the two main sections 162 . do. Another wall 165 connecting side walls 139 and 140 of collective housing 102 is connected to individual suction pipes 103 to 108.
, said walls 158-160 and ribs 16
The second part 130 to 1 of the intermediate part 110 to 115 is located in the region of its exit from the collective housing 102 on one side of 1 and is curved.
35 to the curved intermediate portion 110 to 115
extends to the transition of the first portions 123-128. Wall 165 and the first mentioned wall 158
are mutually transitioning and have wall recesses 166 on each side of the collective housing 102 that are removable without undercuts.
form. Downstream of the rib 161, the independent suction pipe 1
03 to 108 are not interconnected by intermediate wall sections. Simply the flanges 152 of their connecting end portions 116 to 121 merge with each other. The individual suction pipes 103 to 108 are connected to the collective housing 1
The extensions 167 are located partially eccentric to the mold parting plane in the area of their exit from 02.
, and the extension part is a wall 1 disposed within the mold parting plane tangent to the remaining circular outer contour and approximately in the mold release direction.
It extends to 65. The mold dividing surface is the connection end part 1
16 to 121 also extend eccentrically, thereby connecting end portions 116 to 12
1 is also provided with an extension 168 which extends tangentially to the other circular outer contour, approximately in the demolding direction, up to the mold parting plane. Beveled bottom 144 of the collective housing 102 of the connecting end portions 116 to 121
Each side is provided with a longitudinal ridge 169 which extends approximately parallel to the demolding direction and includes a connecting hole for accommodating an injection nozzle. The abutment surface 154 on the wall or longitudinal ridge of the connecting end section is milled in a single working stroke.

The tangential extensions 167, 168 allow easy demolding of the suction tube arrangement without rod parts. Collective housing 102 and individual suction pipes 105 and 1
walls 158 to 160 and 165 and ribs 158 to 160 and 165 arranged between the
61 avoids or facilitates cleaning operations and increases the rigidity of the suction pipe device 101. curved middle part 1
Connecting end portions 116 to 1 to 10 to 115
The longitudinal ridge 169 extending up to the transition point 21 is also used to avoid undercuts.

The core 170 for casting the suction pipe device 101, indicated by dash-dotted hatching in FIG. are mutually engaged and connected in a plane. Each core part 171, 172, 173 has two individual suction pipes 105 and 106, respectively, starting from the collective housing 102, mutually opposite one core part for the collective housing; 104 and 107;
It consists of two core parts for 3 and 108. Core 170 is manufactured relatively easily and inexpensively by this division. Additionally, any skin or burr formation may occur at locations within the collection housing where flow is not adversely affected by the skin or burr.

The intake pipe arrangement shown and described above can be easily converted into five-cylinder and four-cylinder in-line internal combustion engines, in particular by omitting one or two external individual intake pipes. In this case, the course of the individual suction pipes and the state of the collective housing associated with the connecting end part can also be adjusted according to the invention by pivoting the plane of the intermediate part about the above-mentioned cutting axis and/or by translating it, depending on the respective spatial requirements. It can be varied widely within the framework of. In the case of gasoline engines, the collecting housing is simply adapted in the usual manner to the carburetor connection. Starting from the collective housing, the ends of the individual suction pipes can be located within the framework of the invention in a triangular arrangement instead of in a plane, in which the ends of the central single suction pipes are aligned with the assumed axis. , and has a greater distance than the case shown. This allows the height of the collection housing and thus of the entire suction pipe arrangement to be reduced if required. As illustrated in FIGS. 2 and 6, by at least one of translating the intermediate portion of the individual suction pipe together with the collective housing with respect to the connecting end portion and turning around the virtual center of rotation, the respective spaces can be It is possible to choose the overall structure of the suction pipe device that is well adapted to the situation.

11 and 12 show a suction pipe device 201 for a four-cylinder injection-in-line internal combustion engine of the Otto cycle (not shown), which device consists of approximately one collective housing 202, an individual suction pipe 203, 20
4,205,206. The individual suction pipes 203 to 206 emerge from the collective housing 202 obliquely relative to each other in an approximately horizontal plane and in pairs opposite each other and are of the same length. The individual suction pipes have connecting end portions 207, 208, 209, which are located so as to overlap each other and can be connected by flanges to the suction port of an internal combustion engine (not shown).
210 , whose connecting end portions extend in substantially the same direction parallel to each other and to the vertical central longitudinal surface 211 of the collective housing 202 . The assumed extension lines 212, 21 of the individual suction pipes 203 to 206, which are connected obliquely to the side walls 216 and 217 of the collective housing 202, are indicated by dashed lines in the drawing.
3, 214, 215 intersect each other pairwise in the region of adjacent end walls 218 or 219 of the collective housing 202, respectively. Collective housing 2
The lower wall 220 of 02 is provided with one opening 221 to which an air supply pipe (not shown) can be connected.

A single suction pipe 20 exiting the collective housing 202 closest to the connecting end portions 207 to 210
3 and 206 extend from the central longitudinal surface 211 of the collective housing 202 in a continuous curve 222 and away from the connecting end portions 207 and 210 and again in the direction of both connecting end portions and in each case approximately straight intermediate points. It transitions into connecting end portions 207 and 210 by section 223 and countercurvature 224 .

Individual suction pipes 204 and 205 exit from the collective housing on the side remote from the connecting ends 207 to 210.
turns away from the central longitudinal surface 211 of the collective housing 202 into a curvature 225 and extends again in the direction of this central longitudinal surface as well as at the same time in the direction of the connecting end section, and after an approximately straight intermediate section 226 an opposite curvature 22
7 to the connecting end portions 208 and 209. All individual suction pipes 203 to 206 are curved slightly downwardly, in which case the single suction pipes 203 and 20 exit from the collective housing 202 on the side closest to the connecting end portions 207 to 210.
6 curve is for both other independent suction pipes 204 and 205
more pronounced than the curvature of.

The connecting end portions 207 to 210 are each provided with a flange 228 or 229 and are interconnected by a web 230 for reinforcement. The individual suction pipes 203 and 204 or 205 and 206 are interconnected by a wall 231 located in the mold parting plane in order to make them suitable for casting and for reinforcement purposes.

Individual suction pipes 203 and 206 or 204 and 20 facing each other and coming out from the collective housing 202
5 are connected in pairs to the collective housing 202 not coaxially but obliquely to each other, mutually detrimental effects due to vibrations due to direct shock wave transfer between the individual suction pipes 203 to 206 are avoided and Better filling of the internal combustion engine with the suction pipe arrangement 201 is achieved. Single suction pipes 203 to 206 of the same length with approximately the same and relatively large flow-favoring radii of curvature contribute to even better vibration behavior, thereby resulting in good efficiency and torque values according to the suction pipe arrangement 201. is obtained.

[Brief explanation of the drawing]

Fig. 1 is a front view of the suction pipe device for a 6-cylinder in-line internal combustion engine, Fig. 2 is a side view of the suction pipe device according to Fig. 1, and Fig. 3 is the first view seen from the direction of the arrow in Fig. 2. and FIG. 2, FIG. 4 is a front view of another suction pipe device for a six-cylinder series internal combustion engine, and FIG. 5 is a plan view of the suction pipe device according to FIG. 6 is a side view of the suction pipe device according to FIG. 4, FIG. 7 is a sectional view taken along line - in FIG. 4, and FIG. 8 is a sectional view taken along line - in FIG.
Figure 9 is a sectional view taken along the - line in Figure 4;
11 is a plan view of a suction pipe device for a 4-cylinder in-line internal combustion engine in the direction of arrow XI in FIG. 12, and FIG. 12 is a suction pipe according to FIG. 11. FIG. 3 is a side view of the device. 1,101,201...Suction pipe device, 2,10
2,202...Collection housing, 3~8,103~
108,203-206...Single suction pipe, 9,26
~28,122,129,136... face, 10~1
5,110-115,223,226...middle part, 16-21,116-121,207-21
0... Connection end, 29-31... Axis line, 32... Flange surface, 33... Flange, 123-128... First part, 130-135... Second part, 144... Bottom,
146...opening, 152...flange, 153...
Hole, 157... Wall portion, 158, 165... Wall, 16
1... Rib, 166... Wall recess, 167, 168... Extension part, 169... Protrusion part, 171-173... Core part, 211... Center longitudinal surface, 212-215... Extension line, 222, 224, 225, 227... curved,
γ, α...Angle.

Claims (1)

[Claims] 1. It has a collective housing, from which a plurality of individual suction pipes of approximately the same length protrude in opposite directions in pairs within approximately one plane, and the individual suction pipes have approximately the same length. The pipe has a curved intermediate portion positioned so as to overlap each other, and a connecting end portion connected to the intake port of the engine, and the connecting end portions are parallel to each other in substantially the same direction in one plane. The suction pipe for a 4- to 6-cylinder serial internal combustion engine extends substantially perpendicularly to the axis of the end portion emerging from the collecting housing, and the collecting housing is arranged approximately in the center of the row of the plurality of connecting end portions. In the device, the intermediate portions of the single suction tubes are arranged in pairs, each with at least a portion substantially in a plurality of planes, the planes mutually disposed in one or a plurality of mutually adjacent assumed axes in the vicinity of said connecting end portion. intersects with the plane, and the plane widens outward from the intersection point toward the collective housing, and the axis line also extends to the plane of the connection end portion when the individual suction pipe or the connection end portion is connected to the engine. A suction pipe device characterized by being parallel to a flange surface. 2 The ends of the individual suction pipes 3 to 8 coming out of the collective housing 2 are aligned with the assumed axis 29 to 3
1, the two individual suction pipes 5 and 6 starting from the collective housing 2 furthest away from the assumed axis 29 or 31 are connected to the two central connecting end portions 18 and 19. The two individual suction pipes 3 and 8 starting from the collective housing 2 closest to the assumed axis 29 to 31 are connected to the two outwardly connecting end portions 16 and 21 and are connected to the single suction pipes mentioned above. The two individual suction pipes 4 and 7 starting from the collective housing 2 between 3 and 5 or 6 and 8 have connecting ends located between the central connecting end parts 18 and 19 and the outer connecting end parts 16 and 21. a single suction pipe 5 which is connected to parts 17 and 20 and which departs from the collective housing 2 at least the farthest distance from the assumed axis 29 to 31;
and 6 are characterized in that the curved intermediate portions 12 and 13 of and 6 are curved in an approximately S-shape first towards the connecting end portions 16 to 21 and then overlapping and finally towards their connecting end portions 18 and 19. A suction pipe device according to claim 1. 3 Single suction pipes 3 and 8 starting from the collective housing 2 assumed to be closest to the axes 29 to 31
The plane 28 in which the curved intermediate portions 10 and 15 of are approximately located is arranged approximately at right angles to the plane 9 in which the ends of the individual suction pipes 3 to 8 starting from the collective housing 2 are approximately located. The suction pipe device according to claim 2, characterized in that: 4. Claim characterized in that the surface 9 on which the ends of the individual suction pipes 3 to 8 starting from the collective housing 2 are approximately located forms an acute angle γ with the flange surfaces of the flanges of the connecting end parts 16 to 21 The suction pipe device according to item 3. 5 the respective first portions 123 of the intermediate portions 110 to 115 of each pair of individual suction pipes 103 to 108;
128 to 128 each lie substantially in one plane 129, which plane forms an angle α opening in the direction of the connecting end portions 116 to 121 of the plane 122 of the connecting end portions 116 to 121, which angle vs. 105, 106; 104, 107; 103, 10
connection end portions 116 to 121 of the collective housing 102 of the connection to the collective housing 102 of 8;
and the single suction pipe 1 with increasing distance from the end wall 142 on the side of the
Intermediate portions 110 to 115 of 03 to 108
The second portions 130 to 135 of each of the second portions 130 to 135 lie substantially in one plane 136, which plane forms an angle β with respect to the plane 122 of the connecting end portions 116 to 121 in the direction away from the collective housing 102; The angle is smallest at the central connecting end portions 118, 119 and at the outer connecting end portions 116, 12.
2. Suction pipe device according to claim 1, as a one-piece casting, characterized in that it is the largest at 1. 6. The collective housing 102 has an oblique bottom 144 facing towards the connecting end portions 116 to 121;
This bottom is the middle part 11 of the single suction pipe 105, 106 connected to the central connecting end part 118, 119.
6. Suction pipe arrangement according to claim 5, characterized in that the first portions 125, 126 of 2,113 are substantially parallel to the plane 129 in which they lie. 7. The individual suction pipes 103 to 108 are at least partially connected to the walls 158, 15 in the area of the mold parting plane.
Suction pipe arrangement according to claim 5 or 6, characterized in that they are interconnected by 9,160,165. 8. The individual suction pipes 103 to 108 have a substantially circular cross section on the inside, and have extensions 167, 16 on the outside in a range located eccentrically from the mold dividing plane.
8, and the extension part extends tangentially to the other circular outer contour in the mold release direction until reaching the mold parting plane.
The suction pipe device according to any one of claims 5 to 7, characterized in that the suction pipe device extends to a wall 165 disposed thereon. 9 The collective housing 102 on the side facing the connecting end portions 116 to 121 of the collective housing 102
the curved intermediate portions 112, 113 of the individual suction pipes 105, 106 connected to the single suction pipes 105, 106 have a wall portion 157 which is in contact with the collective housing 102 in its central region and is common with the collective housing; Collective housing 102 and its intermediate portion 11
2,113 and the first parts 125, 126 in each case located in one mold parting plane, the walls 158 extend approximately parallel to the oblique bottom 144 of the collective housing 102, and that the single suction pipe 105,1
The side of the wall 158 of 06 is the collective housing 10
In the area of the outlet from 2, in the mold parting plane and with this wall 158, in each case an approximately wedge-shaped wall recess 1
8. A suction pipe device according to claim 7, characterized in that the suction pipe device is formed with a diameter of 66. 10 Individual suction pipes 103 to 105 and 10
The ribs 161 which laterally connect the elements 6 to 108 with each other lie substantially in the plane of the collective housing 102 with the oblique bottom 144 and the walls 158 substantially parallel to this bottom.
and the rib 161 extends in the area of the end opening 146 of the collective housing 102 on both sides away from its main part 162 to approximately the center of the opening 146. 10. The suction pipe device according to claim 9, characterized in that: 11 Individual suction pipes 103 to 105 and 10
6 to 108 are walls 1 located in the mold dividing plane from the rib 161 toward the collective housing 102.
58, 159, 160 and are separated from each other in the direction of the connecting end portions 116 to 124 except for their interconnected flanges 152, or The suction pipe device according to item 10. 12 The individual suction pipes 103 to 108 each have a longitudinal ridge 169 on the outside towards the collective housing 102 in the area of their connecting end portions 116 to 121, each longitudinal ridge approximately comprising a flange 152. The middle portion 110 is curved from the opposite end.
115 and the vertical ridge is penetrated by a connecting hole 153 obliquely in the direction of the connecting end part for receiving the injection nozzle. The suction pipe device according to any one of Items 5 to 11. 13 In particular, in a suction pipe device for a four-cylinder internal combustion engine, the ends of the pair of individual suction pipes 203, 206 or 204, 205 coming out of the collective housing 202 in opposite directions are diagonally connected to the collective housing 202. Claim 1, characterized in that the assumed extension lines 212, 215; 213, 214 which are connected and which extend into the collective housing 202 of the individual suction pipes intersect each other. The suction pipe device described in . 14. A suction pipe arrangement in which the two single suction pipes starting from the collective housing closest to the connecting end part overlap each adjacent single suction pipe and move to the outer connecting end part of the row, the connecting end part 207, 2
The individual suction pipes 203, 206 starting from the collective housing closest to 08, 209, 210 respectively have a continuous bend 222 and a subsequent section (by means of an intermediate section 223, connecting end sections 207 to 21
0 and extending from the central longitudinal surface 211 of the collective housing 202 arranged transversely to their rows and away from the connecting end parts 207, 210 and again towards these two connecting end parts 207, 210. , while the individual suction pipes 204, 205 departing from the collective housing 202 apart from the connecting end portions 207 to 210 are each separated from the central longitudinal surface 211 by a continuous bend 225 and a subsequent portion (intermediate portion 226). again extending towards this central longitudinal plane and later connecting end portions 207 to 21
14. The suction pipe device according to claim 13, characterized in that it extends towards zero. 15 that all individual suction pipes 203 to 206 are curved with a slight downward deflection over a substantial part of their length, and that in the area of the connecting end portions 207 to 210 there is in each case one opposite 15. Suction pipe arrangement according to claim 14, characterized in that curvatures 224; 227 are arranged, the radius of curvature of the opposite curvature approximately matching the radius of curvature of the successive curvatures 222, 225.