DE1940806A1 - Incoming flow passage for combustion engine - Google Patents

Description

EDUARD LORENZ ■ BERNHARD SEIDLER · MARGRIT SEIDLER DIPL.ING.HANS KARL GOSSEL. DR. JUR. LÜDER WITT

LAWYERS

8 Munich 22, Widenmayerstraße 23 Telephone [0811] 297194/297834 Postal check: Munich 170280 Bank account: Bayerische Vereinsbank

Munich, Account 862019 Your reference

Our sign 10,532 day

IiIssan Diesel Hotor Go., Ltd. Kauaguchi (Saitaina, Japan)

'.'jiiistrüLidurclilaß for internal combustion engine

The invention relates to a Sinströmdurchlaß for a nit lain and forth! ¹ piston movement working Yiertalct - \ "engine, in. Which air or an air-fuel mixture called ai-3 below is introduced or sucked in by an ilinstronivcntil in the cylinder.

In the usual four-cylinder combustion cycles with reciprocating piston movement, the fresh charge introduced into the cylinder through the inflow valve is swirled, because it is better evaluated or the degree of combustion efficiency of the I-Iotor is improved. Up to now, only the inertia of the static charge flow rushing up on the cylinder wall or a spiral inflow channel or a baffle plate or the like has been used. The charge, which is only fouled due to its inertia, is, however, exposed to the disturbing influence of a flow which is to be stopped on the upstream flow of the inflow pipe or intake manifold. When using a spiral inflow channel or an inflow plate, the gas flow is caused by the sharp uj-üi-miung of the inflow channel or other flow resistances ^; > rt, no dah; the Einstrümwiderötand enlarged v; ird.

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If the usual inflow passage was used, it was therefore difficult, c.ie l'rischladen:.; it the desired speed to swirl, oiiiie that the volumetric V / efficiency or the gas exchange capacity is reduced v / urde.

The main task of the invention is to swirl the charge in the cylinder of an internal combustion engine at a desired speed without reducing the efficiency of the motor, and for this purpose the formation of the inflow channel around the oil valve opening To improve the inlet passage of the Iotor.

In the 21nström: ndurci; la-l of a four-stroke engine r :: it reciprocating piston movement gei / Ä.2 der Uriichtung aie Linstrüuventilöffnurig has a "Γΐ-ΐια, which is based on the Ilittelachce r.ählie.jenaen üeite an inward -.- "c-i? Jumping Part has.

The invention sc} FLIR u..fft a Verbrennungsr.otor a Einstründ ^ rchiai3: .ι ± τ :: a, i] instronlcs.nal and a SinströiT / entiiüffnung. The 'iand aer Uinströn / entilöffnurg has one in the Uinstrü ^ durchla ^ vors-.rI: .gencen leil, aor a step in Porn forms a sickle odex- an Ilreissegi-'ien ^ s or a part of a sickle or a segment of a circle . The profile of this protruding "square" surface unfa'it a straight line or a slightly curved line, which connects the edge of the hole for mounting the Yentilschafts i: it the! Front band of the step. The profile of the '.vandflache e: The side of the Sinstronil canal remote from the center line of the corresponding cylinder merges into the edge surface of the valve opening in a smooth curved line. The profile of the surface on the side of the Einströnkaiial closer to the center line of the named cylinder is smoothly curved, and zv / ar in such a direction that it approaches the first-mentioned profile of the Einströnkaiial, or in a similar seal that it approaches extends forward into your Sinströnlcanal.

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Execution s "at θ j) The elements of the invention are as follows described with reference to the drawings. In these shows

Pig. 1 in section a single-stivemvent hope that forms part of the inflow passage according to the invention. The cut is made in a plane in which the center line the 3 ohr χ mg lies in v / elach of the single-flow valve stem is supported, so-./ie the center line of the corresponding cylinder. That level is in Pig. 2 denotes ait i-I.

Pig. Figure 2 shows in a section along the line-H-II in Fig. 1 a Ausfülirungsforli the stage, which of the curved “And part of the inflow opening according to the invention is formed.

Pig. 3 through b show in the pig. ? .. similar :; Representations a different version of the stage.

Pig. 6 shows schematically the Irofile of the Einströmkanals, of the inlet valve and the corresponding cylinder and explain the formation of the inflow canal, the one Forms part of the Einstr'J:.: Durenlasses according to the invention.

Pig · 7 shows in one of the Pig. 6 similar representation another embodiment:.: Aes Einströnkc.iials.

Pig. 8A and OB illustrate »cliemcticch the compound svrischen the ^T-.fan ifläche of Einströnkanals and the V / aiidfläche aer Einstrosiäffnung according to the Erfinaung.

Pig, - 9 shows in one. Section along the line IX-IX in Pig. 10 a part of a cylinder head it, "the nit the ;. erfindungsge :: ui; 3en A door and ure hlaß is provided from the ;; Einströnücanal and aer Einströnventilöffniuig consists.

Pig. IO shows a bottom view of the üyliiiderkor.fes 009833/1300

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Pig. 11 a section along the line XI-XI in FIG. 9,

Pig. 12 shows a section along the line XII-XII in FIG. 9, ■

Pig. 13 shows a section along the line XIII-XIII in Pig. 9,

Pig. 14 shows a section along the line XIV-XIV in

Fig. 9,

Pig. 15 in a larger hatred a rope of the cylinder head with an embodiment of the Einstrüidurchlaöoes according to the invention;

Pig. 16 larger Ha.Qstab a rope Zylinderlcopferj π it one thing: another embodiment of the E ^"r .nstrcr.i>& inventive Nals.

Pig. 17 in a bottom view of a _# part of the cylinder head with the inflow passage according to the invention, "which is provided with a guide vane for the inflowing gas.

First will. ..ie Einströmventilüfnung described, which is a 'part of the; According to the invention, the inflow passage for a quarter-cylinder is formed by a motor with a reciprocating bow. Pig. 1 shows the inlet valve opening 1 in a cross section which is guided in a plane which contains the center line, not shown, of a bore 2 in which the tent ile chf. Ft is mounted. This bore opens into ax one valve opening at its upper end. In the section line is also the line, not shown, in. Pig. 1. I-I'ctellinie of the corresponding cylinder arranged on the right-hand side. The 'ί, ζχΛ of the opening 1 jumps on the side that is closer to the I-Iifjollinie of the cylinder than the center line of the bore 2 for storage, the valve stem, ie ₀ on

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the one in Pig. 1 right side, inwardly in front, forming a step 5, which is the upper surface of the Limf ang arandt e ile one is facing the valve disk, not shown. The surface 9 of the level 5 lies in a plane that is in a low Vertical distance h from the central plane of a Yentilsitzflache 3 is located. This central plane is indicated by the dash-dotted line 4. The surface 9 extends in the v / it ent borrowed perpendicular to the I-center line of the bore 2 for storage of the valve stem in the plane through the line II-II in Fig. 1 is indicated. According to FIG. 2, the surface 9 of the step 5 is sickle-shaped. This shape is the same as the one in front Edge 6 of the step 5 and an arc 11 of a circle 10 bounded, which is formed by a viand 14. which directly connects to the upper ! Country of valve seat 3 is connected. The breadth of the sickle d.lio, the distance between the bow 11 and the front hand 6 of stage 5 is denoted by i in FIG. The size of the area 9> i.e., the distance between the opposite ends 12, 13 of the step 5 in a plane which is in is essentially at right angles to the center line .der bore 2 for mounting the valve clip ts, is by an angle tX between two routes 16, 17 determined, one on the extension of the liittellinie of the bore 2 for the storage of the Valve stem lying point or the center O of the Connect circle 10 to opposite ends of the step.

According to the invention the majority of the inwardly projecting wall surface 8 is formed such that a line connecting the Au ^r 3enrand 6 of the stage 5 with the lower hand 7 of the bore 2 for supporting the valve stem, and determines the cross-sectional shape of the inwardly projecting wall portion of the opening, in at least one plane which contains the center line of the bore for mounting the valve stem, is essentially a straight line or a line that is only slightly curved.

In Fig. 3, the inwardly projecting Viand part is formed in the same way as in Figures 1 and 2, but the Shape of the surface 9 'of the inwardly projecting

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^T , / andteil formed stage obtained by the fact that from the in Pig. 2 sickle shape shown a part is cut off. The pre-milled edge parts shown in FIGS. 4 and 5 are also designed in the manner indicated above, but the one in Pig. 4 shown, inwardly projecting wall part a step 9 ^W , the shape of which is determined by an "arc 11" of the circle 10 and a chord 6 ". The wall part shown in Pig. The shape of which is obtained by cutting off a rope from the segment of a circle shown in Pig.4 and rounding off the corner.

'& · ■

The distance h between the Iitteleoene 4 of the Yentilsitaflache and the surface of the step 9? 9 ¹ , 9 "or 9"'is not greater than 30 / »of the outer diameter of the ν er v / ended single-flow valve disk. The width i of stage 5 is at most 5-25 ^L p of the outer diameter of the single-flow valve disk. The central angle **, which determines the distance between the opposite ends of step 5, is not much greater than 180.

hereinafter is the bin flow channel according to the invention described by the prischlaaung of the above Inflow / vent opening supplied v / ird.

Pig. 6 schematically shows the profile 21, 22 of a cable of the inflow channel adjacent to the valve opening, a circular profile 2Z of the inflow valve and a circular profile 24 of the cylinder bore. The channel is designed so that the profile of the ".Tandflache 21 of the channel on the side that is closer to the center line of the cylinder or the center point O of a circle 24, the profile 22 of the channel on the distant from the center point G. Side smoothly In Fig. 6, 25 denotes a reference point which lies on the profile 21 and whose distance from the center ^{O1 of} the circle 23 corresponds to the diameter of this circle.

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Kit 26 is an intersection of a egg around; ten line, the one large part of the profile 21 in the area of the EinotrümventHoffnung or an extension of the same, denoted by the circle 23. So that the palm 21 has a suitable profile or is given a suitable curvature, the angle β is preferably not more than 30. This angle becomes one hand limited by an extension 27 of a segment which connects the intersection point Γ6 with the fixed reference point, and on the other hand, from a line 23, which connects the intersection point 26 with the center point 0 * of the circle 23. If the Angle ß is too much larger than the fourth given above, there is an unfavorable effect on the fresh charge entering the inflow channel, the flow of which is then disturbed will.

Pig. Figure 7 shows another embodiment of the profile of the inlet channel. This embodiment is based on the same principle as that in Pig. 6 shown. Similar parts are denoted by the same reference numbers "stranded with a prime (·). In this embodiment, the angle β * formed by the extension 27 'and the line 28' is on the same side of the line 28" as the profile ?.?: * un.i, the angle ß ^{1 is} preferably not greater than 30 °.

According to Pig. 8A and 8B, the profiles 22 and 22 'on the side of the Eiiiströnki.nals remote from the center line 0 of the cylinder are preferably connected by a curved line 29 which represents the profile of the wall surface of the inflow opening and in at least one cross section in one of the inflow opening adjacent The plane that is essentially at right angles to the center line of the bore for mounting the valve stem forms a smoothly curved line. The profiles 21 urJL 21 'of the Eintr önkanals adjacent to the center point 0 and the curved line 29 form a sharp kink (Pig. SA) or at their connection points, ie the parts corresponding to the centers 26 and 26' a curved line with a radius of curvature not greater than 50 ) ί des

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Outside diameter of the one used in d3ni Binatröcidurciilaß Bin flow valve disc (Pig. SB). One of the BiiisVr öiuvantil opening adjacent part of the inflow channel has ixi a plane which essentially perpendicular to the direction of flow of the Irish charge is a relatively simple cross-sectional shape, not shown, which corresponds approximately to an ellipse or a rectangle. The cross-sectional area of the channel increases against the Direction of flow of the Friseli charge initially closes and remains then constant.

FIGS. 9 to 14 show a typical exemplary embodiment of an inflow passage which flows from a Sins tr Ömkanal and an inflow valve opening, which are connected according to the principle explained above. In the Explanation of the inflow channel shown in these drawings, it is assumed that the opening cross section 30 of One inflow valve port is open when the inflow valve disc is is in its lower position. The inlet valve plate is not for the sake of clarity of illustration shown. A fresh charge supplied through an inflow line (not shown) or an intake manifold flows into a Opening 33 of the inflow passage 32 in the cylinder head and then into the inflow valve opening 34. As in this case If the inflow channel is designed according to the invention, the largest part of the fresh charge approaching the opening 34 flows in the direction of the arrow shown in Fig. 11 and this part of the fresh charge is swirled. The inward projecting Viand part 40 of the valve opening 37 is with the Wall part 36 of the channel connected. Another part of the wall the valve opening 37 has a concave opening as shown in FIGS. The lower edge of the hole 5.9 for the storage of the The valve stem is with the outer edge 38 of the inward . protruding wall part- formed by a level step Surface 40 (Fig. 13) connected. Most of the fresh charge then flows along the concave wall part and then along the inwardly projecting wall part in the valve opening, whereby the swirling of the fresh charge is supported. if the swirled cargo charge in the one described above

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The way in which hope flows, there is a predetermined distance between the valve disk and the valve seat. On that side of the valve opening on which the inwardly projecting wall part 40 forms a step in the form of a broken sickle, however, the flow of the fresh charge entering the cylinder is throttled. This cylinder is not shown; it is arranged under the cylinder head. How best from the Pig. 10 shows, this throttling of the gas flow at .dem end 41 of the step 35, ie where the inwardly projecting wall part merges into the ■ concave wall part, is relatively weak and strongest at the other end 42 of the step, ie there, v / o the inwardly projecting wall part has the greatest width. As a result, flows through the fresh charge through the gap between the valve "g seat 43 and the valve plate into the cylinder in a part of the opening cross-section 30 in a larger amount than in that of the step 35 adjacent part of the üffnungsquerSchnitts. For this reason and due to the fact that the fresh charge entering the valve opening is swirled thanks to the special design of the channel, as explained above, the fresh charge located in the cylinder is forced to swirl, so that the combustion efficiency or the utilization of the fresh charge by the engine is improved Using the inflow passage according to the invention, the fresh charge to be introduced into the cylinder is forced into a certain flow direction only in the inflow passage which is formed in the cylinder head 31, the flow of the fresh charge is essentially not subject to any disturbing influence upstream of the inflow passage existing gas flow, so that the flow resistance is as small as possible.

In Fig. 15, two cylinders are from the underside of the opening cross-sections 52 and 53 of inflow valve openings shown associated with these cylinders. The profiles of these cylinders are represented by circles 50 and 51. The inwardly projecting wall parts 54 and 55 of the inflow valve openings and a symmetrical delayed / own channel 56 to the

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Initiate a fresh charge correspond to the valve openings the idea of invention in their training.

In the embodiment according to FIG. 16, a cylinder, indicated by a circle 60, has two Inflow valve openings 61 and 62 are provided. These openings each have an inwardly projecting one designed according to the invention Wall part 63 or 64 · An inflow channel 65 to the Supplying the fresh charge to the valve openings is also designed according to the invention.

Fig. 1? shows an inflow passage designed according to the invention with an inflow valve 70 and a Channel 71 in the cylinder head 73 · In the channel is in the area the valve opening a guide vane 72 is arranged through which the styling charge entering the valve opening is directed in such a way that the gas in the valve opening in a desired Direction flows. The guide vane 72 is attached to the upper or lower end of the duct and has such a height and breadth as to permit the flow of the fresh cargo in the valve opening does not interfere.

Several exemplary embodiments of the invention have been described above, which, however, can be modified in keeping with the inventive concept.

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Claims (12)

1 9 4 O ε O 6 Pat e ϋ 'c- & Λΐϋ pr U che % / 1. J Einströffidureliiaß for a Fiertakt-Yeruromiungsmotor with iiin- and herg ^ iiendei * piston movement, ge3: single line through an inflow valve opening and an inflow channel to supply a fresh charge, dung to the inflow valve opening. which forms a step which lies opposite a part of the upper surface of the Uinfangsraiidteils of the inflow valve divider, the surface of this step lies in a plane ₅ which is adjacent to the valve seat for the inflow valve disc and is essentially normal to the center line of the bore for mounting the inflow valve stem, and the largest part of the profile - which connects the lower edge of the bore for mounting the valve stem with the front hand of the step and delimits the cross-section of the inwardly projecting viand part in at least one plane containing the central part of the bore for mounting the valve stem essentially a straight line or a slightly curved line is " 2. inflow passage according to claim 1, characterized in that that the surface of the step is sickle-shaped. 3 · EiiiströKdurehlaß according to Inspruch 1, thereby characterized in that the surface of the step is in the form of a partially broken sickle. 4. inflow passage according to claim 1, characterized in that that the surface of the step has the shape of a segment of a circle. 5. inflow passage according to claim 1, characterized in that the surface of the step has the shape of a partially broken circle segment. 6. Einstrümdurchlaß according to claim 1, characterized in that that the step is formed on that side of the inflow valve opening which is the center line of the corresponding 009833/1300 8AD Cylinder is closer than the center line of the hole to the ! Management of the Einströraventilschafts. V. 7 · Inflow passage according to claim 1, characterized characterized in that the vertical distance between the surface of the step and the center of the width of the valve seat is not greater than 30 ^c ß> the outer diameter of the inlet valve plate cooperating with the inlet valve opening. 8. inflow passage according to claim 1, characterized in that the greatest width of the step 3-25 $ des Outside diameter of the inlet valve disk is. 9 »inflow passage according to claim 1, characterized characterized in that the angle between the lines, the opposite ends of the step with an extension the center line of the bore for mounting the inlet valve stem connect, in a plane containing the surface of the step is at most 180. 10. Egg flow passage for a four-stroke internal combustion engine with reciprocating piston movement, marked through an inflow valve opening and an inflow channel to the Supplying a fresh charge to the inflow valve opening, wherein the wall of the channel on the side closer to the center line of the corresponding cylinder has a profile that progressively inward towards the inflow valve opening extends into the canal. 11. Inflow passage according to claim 10, characterized in that the profile of the inflow valve opening and the profile of the inflow channel are chosen so that in a projection deo profile one of the valve opening adjacent Part of the channel and the profile of the valve opening the angle between an extension of a route that has one on the Profile of the duct lying point from the center of the circular profile of the inflow valve disk is arranged at a distance that corresponds to the diameter of the circular 009833/1300 SAD ORIGINAL ■ - ■ - '■' ■ 1 i 19A0806 Profile corresponds, with an intersection between the profile of the channel or an extension of the same and the circular one Profile of the inflow valve divider connects; and a line segment that crosses said point of intersection with the center point of the circular profile of the inlet valve plate, is not greater than 30 °, 12. inflow passage according to claim 10, characterized in that the .Profil of the inflow channel and a curved line showing the cross-sectional shape of the wall surface of the inflow vent in at least one to the center line the bore for mounting the valve stem is essentially normal plane, so connected to one another are that they form an acute angle. 13. Inflow passage according to claim 10, characterized in that the profile of the inflow channel and a curved line, which represents the cross-sectional shape of the wall surface of the inflow valve opening in at least one plane essentially normal to the center line of the bore for mounting the valve stem, are connected by a curved line are connected, the radius of curvature is at most 50 % of the outer diameter of the inlet valve plate. l4. Inflow passage according to claim 10, characterized in that marked that the Prof11, janes part of the inlet duct wall fleece * which is opposite to the profile mentioned in claim 10, vind a curved line showing the cross-sectional shape the palm of the inflow valve opening in at least represents a plane leading to the centerline of the hole for the storage of the corresponding inflow valve stem in the essentially normal 1st, connected by a smoothly curved line. 003833/1300 15 · inflow passage according to claim 10, characterized characterized in that a guide vane is provided in the inflow channel, which is used to control the in the inflow passage guide the flowing prish charge in a desired direction. l6. An inflow passage for a four-stroke reciprocating piston internal combustion engine, characterized by an inflow valve opening and an inflow passage for supplying a Prischarge to the inflow valve opening, the inflow valve opening having an inwardly projecting portion which forms a step which forms part of the upper surface of the peripheral edge portion of the inflow valve disk opposite, the surface of this step lies in a plane which is adjacent to the valve seat for the inflow valve divider and to the center line of the bore for mounting the inflow valve stem is essentially normal, the largest part of the profile, which the lower edge of the bore for mounting of the valve stem connects to the front edge of the step and delimits the cross-section of the inwardly projecting wall part in at least one plane containing the center line of the bore for supporting the valve stem, essentially a straight line or a slightly curved one te line, and the wall of the channel on the side closer to the center line of the corresponding cylinder has a profile which extends progressively inwardly into the channel towards the inflow valve opening. 009833/1300 Blank page