EP2179147A1 - Culasse pour un moteur à combustion interne - Google Patents

Culasse pour un moteur à combustion interne

Info

Publication number
EP2179147A1
EP2179147A1 EP07820339A EP07820339A EP2179147A1 EP 2179147 A1 EP2179147 A1 EP 2179147A1 EP 07820339 A EP07820339 A EP 07820339A EP 07820339 A EP07820339 A EP 07820339A EP 2179147 A1 EP2179147 A1 EP 2179147A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
head according
inlet
cylinder
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07820339A
Other languages
German (de)
English (en)
Inventor
Andreas NÖLTING
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lisa Draexlmaier GmbH
Original Assignee
Lisa Draexlmaier GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lisa Draexlmaier GmbH filed Critical Lisa Draexlmaier GmbH
Publication of EP2179147A1 publication Critical patent/EP2179147A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/02—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/02—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves
    • F01L7/021—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves with one rotary valve
    • F01L7/022—Cylindrical valves having one recess communicating successively with aligned inlet and exhaust ports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/02—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves
    • F01L7/026—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves with two or more rotary valves, their rotational axes being parallel, e.g. 4-stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/18—Component parts, details, or accessories not provided for in preceding subgroups of this group

Definitions

  • the invention relates to a cylinder head for an internal combustion engine, in which at least a rotary valve, a gas flow is controlled in the cylinder head.
  • Cylinder heads with rotary valves for controlling the gas streams, in particular the inlet and outlet, are known from the prior art.
  • Cylinder heads with rotary valves are known from US 5095870 A and EP 0423444 Bl, the rotary valves are provided with recesses, which are rotated depending on the position of the associated piston so that the connection of a SusStromkanals in the cylinder head to the outlet channel by means of the gated opening in the rotary valve of the cylinder or the connection of an intake passage in the cylinder head to the cylinder is made or closed.
  • the invention has for its object to provide a cylinder head of the type mentioned, on the one hand allows a high maximum power of the engine due to high permissible speeds, and optimized filling of the cylinder, and on the other hand in the Part load range generates high torque and allows economic operation.
  • a control device for internal combustion engines which is arranged in each of the leading to the individual working spaces of the cylinder intake pipes in front of the inlet valve, the inlet cross-section periodically opening and closing throttle member whose opening and closing time in relation to the opening and closing time of the intake valve is variable.
  • the document US 45 72 116 A shows a similar control device for internal combustion engines, which has a arranged in the intake pipe upstream of the inlet valve rotary member by means of which the inlet cross section can be adjusted.
  • the first and second elements are arranged and mounted so that in their initial position the inlet or outlet section or region of the cylinder and the associated channel are in no way impaired. Between the cross section as far as possible reducing position and the starting position can
  • Intermediate positions may be provided. In this case, discrete intermediate positions can be realized or a continuous operation between the output and the maximum position.
  • the first and second elements are mechanically connected to each other to make the movement or the movement as simple as possible.
  • both elements are at least largely arranged in the starting position in the wall section between the inlet or outlet section of the cylinder and the associated channel.
  • the first element may be made relatively short, whereas the second element should be designed rather elongated.
  • the second element can therefore have a plate-like shape, but in any case is adapted to the channel and therefore can also have other shapes, eg. can also be a gutter form appropriate, m] edem case is basically an elongated element.
  • a continuous transition from the first to the second element should be ensured in each position.
  • a design has proven in which the second element has a more or less circular cross-section at its front end directed towards the first element, which engages in a corresponding recess of the first element.
  • a third element is provided, which can be introduced into the inlet or outlet section of the cylinder so as to reduce the effective cross section of this area towards the rotary valve.
  • this element can be moved by this element, the opening time of the cross section and the total opening time can be reduced. This is of particular interest for the partial load operation, so that this measure can be used in combination with the previously described measure in order to improve the operation of the internal combustion engine in the partial load range.
  • the design with respect to the third element can be carried out similarly as with respect to the second element, ie, expediently, the third element can be brought into various intermediate stages discretely or steplessly.
  • a part of the inlet or outlet of the cylinder is closed flat, and it can also be thought to make the third element so that the area covered by it is not completely closed, but allows a partial flow through, for example.
  • Recesses are provided in the third element.
  • the third element is displaced on a circular path, whereby other possibilities of moving the element from the starting position into the maximum position are also possible. as well as intermediate positions are possible.
  • the third element may, like the first element, be arranged in a wall region of the cylinder head in the starting layer, so that in the starting position the geometry of the inlet / outlet region of the cylinder and of the associated channel is not impaired.
  • the first and the third element can interlock, which allows a space-saving, compact solution.
  • the resulting dead space is kept small at the maximum extended position of the elements.
  • This dead space can be covered according to an advantageous development of a guided element, so that no dead space occurs in this position and in the intermediate positions, which can lead to turbulence of the incoming and outflowing gas.
  • This element is advantageously designed as a thin-walled aperture.
  • Fig. 1 shows the invention applied in the outlet region of an internal combustion engine.
  • the outlet portion of the cylinder is designated 1.
  • This can be opened or closed by means of a rotary valve 3.
  • the rotary valve has a Ausappelunq 4, which extends in the concrete exemplary embodiment over a Winkei Society of about 180 ° and in its contour is such that it in the position shown, which represents the Maximalo réelle, a continuous transition from the outlet section 1 of the cylinder allows the recess 4 of the rotary valve in the exhaust passage 2 of the cylinder head.
  • the outlet channel 2 is bounded at the top by the upper wall 9 and down through the lower wall 8 of the cylinder head.
  • the first element 5, the second element 6 and the third element 7 are arranged in the lower wall 8 of the cylinder head such that the outlet section 1 of the cylinder and the outlet channel 2 of the cylinder Cylinder head are not disturbed.
  • the position shown in Fig. 1 is characteristic of the full load operation of the engine, in which the largest possible effective channel cross-section is to be made available.
  • Fig. 2 shows the corresponding position of the rotary valve in the partial load range.
  • the effective channel cross-section of the outlet channel 2 should be reduced
  • the rotary valve should later open, i. the outlet channel will be released later.
  • the rotary valve 3 to the left ie counterclockwise, rotates.
  • a later opening of the outlet section 1 is achieved by the extended third element 7, since the edge at which the recess 4 opens the outlet section 1 is displaced in the direction of rotation and thus the outlet section 1 is opened later.
  • the first element 5 which - as shown in FIG. 2 - m is pushed the outlet channel 2, the effective cross section of the outlet channel 2 is reduced.
  • the second element 6 is provided, which ensures this transition as an elongated element on the one hand and on the other hand, that the channel cross-section continuously expands, whereby the ejected exhaust gas can relax, which also has an advantageous effect on the gas exchange.
  • the full not provided with reference numerals bearing points of the first and third elements 5, 7 are indicated.
  • the first element 5 and the third element 7 slide together in the starting position in a compact and advantageous manner, so that they can be accommodated in the lower wall section and the preferred geometry of the outlet section 1 or outlet channel 2 is not disturbed.
  • a dead space which in practice, however, does not disturb the flow appreciably, as in the taken schematic representation, the elements 5, 6 and 7 have been shown for clarity much more than they are actually in the practical embodiment. That is, in the concrete embodiment, in particular the elements 5 and 7 are designed comparatively thin with a small thickness, so that said dead space correspondingly low.
  • the dead space is further covered by a louver-like aperture, which follows the outer contour of the rotary valve and is mounted in the wall of the outlet port 2.
  • This panel is taken by the first and third element 5 and 7, so pulled apart when pushing out and pushed together again when moving together in the opposite manner.
  • FIGS. 3 and 4 show in an analogous manner the application of the invention in the inlet region of an internal combustion engine.
  • Fig. 3 shows the non-activated
  • Cross Section Adjustment Device which is desirable at full load to achieve a maximum inlet cross section.
  • Fig. 4 shows the device in the partial load range with correspondingly reduced channel cross-section and shifted control time.
  • a constant channel cross-section is preferred in the inlet region at partial load near the inlet section of the cylinder, so that the second element 6 is displaced in parallel, unlike the cross-section adjustment device described with respect to the outlet section, and no pivoting or tilting movement is realized.
  • an undesirable Querterrorismsreduzierunq towards the inlet portion is avoided and a largely constant channel cross-section ensured to achieve a largely laminar flow. Continuous transition from reduced cross-section to full cross-section can be achieved farther upstream through appropriate similar elements or orifices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne une culasse avec au moins un tiroir rotatif qui dispose d'un évidement pour ouvrir ou fermer un conduit d'admission ou d'échappement. Un dispositif de réglage de section disposant de deux éléments mobiles est prévu dans le conduit d'admission ou d'échappement. Le premier élément peut être amené, depuis une position initiale dans laquelle le conduit n'est pas affecté par l'élément, dans une position dans laquelle le premier élément fait saillie dans le conduit et le ferme au moins partiellement. Le deuxième élément est couplé au premier élément à partir duquel il fait saillie dans le conduit. Un troisième élément, qui peut pénétrer dans la partie d'admission ou d'échappement du cylindre, est en outre avantageusement prévu pour modifier la distribution.
EP07820339A 2007-09-19 2007-09-19 Culasse pour un moteur à combustion interne Withdrawn EP2179147A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/059895 WO2009039877A1 (fr) 2007-09-19 2007-09-19 Culasse pour un moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP2179147A1 true EP2179147A1 (fr) 2010-04-28

Family

ID=39415298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07820339A Withdrawn EP2179147A1 (fr) 2007-09-19 2007-09-19 Culasse pour un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP2179147A1 (fr)
WO (1) WO2009039877A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036184A (en) * 1974-03-08 1977-07-19 Dana Corporation Stratified charge engine
AU7955082A (en) * 1981-02-25 1982-09-02 Fred L. Baldwin Rotary valve cylinder head
FR2717857B1 (fr) * 1994-03-25 1996-04-26 Maurice Huwarts Moteur à combustion interne, à obturateurs de distribution rotatifs.
US6390048B1 (en) * 2000-07-13 2002-05-21 Kevin M. Luchansky Valve apparatus for internal combustion engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009039877A1 *

Also Published As

Publication number Publication date
WO2009039877A1 (fr) 2009-04-02

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