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EP0900327A1 - Culasse pour moteur a combustion interne multicylindre - Google Patents

Culasse pour moteur a combustion interne multicylindre

Info

Publication number
EP0900327A1
EP0900327A1 EP97918132A EP97918132A EP0900327A1 EP 0900327 A1 EP0900327 A1 EP 0900327A1 EP 97918132 A EP97918132 A EP 97918132A EP 97918132 A EP97918132 A EP 97918132A EP 0900327 A1 EP0900327 A1 EP 0900327A1
Authority
EP
European Patent Office
Prior art keywords
valves
camshafts
cylinder head
cylinder
actuating elements
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.)
Granted
Application number
EP97918132A
Other languages
German (de)
English (en)
Other versions
EP0900327B1 (fr
Inventor
Salvador Ribes-Navarro
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.)
Audi AG
Original Assignee
Audi AG
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 Audi AG filed Critical Audi AG
Publication of EP0900327A1 publication Critical patent/EP0900327A1/fr
Application granted granted Critical
Publication of EP0900327B1 publication Critical patent/EP0900327B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis

Definitions

  • a cylinder head for a multi-cylinder internal combustion engine comprises at least two intake valves and two exhaust valves per cylinder, the valve disk centers of the intake valves and the valve disk centers of the exhaust valves not being arranged at the same distance from the perpendicular bisector of the cylinder head.
  • a generic cylinder head is known from WO 86/05237. This cylinder head is completely symmetrical. This results in a whole series of problems when accommodating the individual components in a confined space within the cylinder head.
  • the intake valves and the exhaust valves are controlled by two camshafts, a number of identically designed actuating elements are arranged between the valves and the cams of the camshafts and have the Cams of the camshafts assigned to valves have different base circle diameters. This ensures that the intake ports and the exhaust ports of the cylinder head on the receptacles for the Stud bolts of the cylinders, the bearings of the camshafts and the recesses for the injection nozzles can be passed.
  • the actuating elements being of identical design for all valves, there can be no confusion when equipping the cylinder head with the actuating elements.
  • the actuating elements associated with the inlet valves and the outlet valves are inclined to the camshafts to the same extent in order to achieve a uniform rolling or friction between the actuating element and the valve or the valve cap.
  • the object is achieved by the features of patent claim 2.
  • the inlet valves and the outlet valves are controlled by two camshafts, a number of identically designed actuating elements are arranged between the valves and the cams of the camshafts, and the actuating elements assigned to the valves are inclined to different degrees to the camshafts.
  • the bearings of the actuating levers are arranged at different heights.
  • the inlet and outlet valves as well as the actuating elements are arranged here in a manner that is almost contrary to symmetry.
  • the cams of the camshafts assigned to the valves have the same base circle diameters.
  • the two mentioned embodiments can also be combined with one another, so that the inlet valves and the outlet valves are controlled by two camshafts, that between the valves and the cams of the camshafts a number of identically designed actuating elements is arranged such that the cams assigned to the valves Camshafts have different base circle diameters and that the actuating elements assigned to the valves are inclined to different degrees to the camshafts. This then opens up a further degree of freedom, which allows even more extensive use of the space available in the cylinder head.
  • the valve springs of the inlet valves and the outlet valves, which counteract the actuating elements advantageously have different installation lengths depending on the position of the valve plate centers in the installed state.
  • valve springs which all have the same size and the same spring constant, act against the actuating elements with different forces depending on the installation length or compression.
  • the different forces are necessary since not only the valve plate centers of the valves but also the actuating elements are arranged at different distances from the perpendicular to the cylinder head or the camshafts, and different lever forces arise from the different distances of the actuating elements when they engage the cams of the camshafts surrender.
  • the actuating elements are preferably designed as rocker arms, the rocker arms being mounted on hydraulic support elements. This eliminates the need to store the actuating elements on separate shafts, so that there is a substantial saving in space.
  • the hydraulic support elements are particularly suitable for the arrangement of the actuating elements in differently inclined positions relative to the camshafts. The actuating elements can thus be arranged at different angles of inclination without any additional measures having to be taken.
  • Figure 1 is a plan view of the cylinder head according to the invention in a highly simplified schematic representation
  • FIG. 2 shows a section along the line If-Il * from FIG. 1, to illustrate the actuation of the two inlet valves according to the first embodiment of the invention
  • 3 shows another section along the line HI-HI 'from Figure 1 to illustrate the actuation of the two exhaust valves according to the first embodiment
  • Figure 4 shows a section along the line H-H 'of Figure 1, according to the second embodiment.
  • FIG. 5 shows a further section along the line III-II from FIG. 1 according to the second embodiment of the invention.
  • the cylinder head 1 has two intake valves 2 and two exhaust valves 3 per cylinder 4.
  • the valve plate centers 5 of the two intake valves 2 as well as the valve plate centers 5 'of the two exhaust valves 3 are arranged at different distances from the center perpendicular M of the cylinder head 1.
  • the valve stems 6 of the inlet valves 2 and the valve stems 6 'of the outlet valves 3 are at different distances from the axes of a first one and a second overhead camshaft 7, 7 '.
  • actuating elements 9 of identical design are arranged between the cams 8 of the camshafts 7, 7 'and the free ends of the valve stems 6, 6'. These actuation elements 9 are designed as simple rocker arms and are mounted on a hydraulic support element 10 with a hemispherical joint head 11.
  • the actuating elements 9 are brought to bear against the cams 8 of the camshafts 7, 7 'by means of a valve spring 12. As a result, the actuating elements 9, when acted upon by the cams 8, act counter to the force of the valve springs 12.
  • the intake valves 2 associated cam 8 of the camshaft 7, T differently sized Grund Vietnamese silk silk screen ⁇ diameter DG I, DQ2 on - ⁇ s can be clearly seen that there DQ I is greater AJS D ⁇ 32-
  • the various actuators 9 all have same position or inclination in the cylinder head 1.
  • the working area of the actuating elements 9 is defined by the respective base circle diameter DQ-), DQ2 unc * by the position of the intake valves 2.
  • the working area is the area with the cams 8 of the camshafts 7, 7 'is in contact.
  • the valve springs 12 used In order to be able to maintain approximately the same lever forces on the side of the support element 10 and on the side of the free end of the valve stem 6, 6 ', even with differently defined working areas of the actuating elements 9, the valve springs 12 used, all of which have the The same size and the same spring constant have different installation lengths Lpi, Lp2 when installed.
  • the installation length Lpi is chosen to be shorter than the installation length Lp2-
  • FIG. 3 a section along the line III-II I "through the two outlet valves 3 is shown in FIG. 3. It is clear from this illustration that the size relationships for the outlet valves 3 are exactly opposite Base circle diameter DQI smaller than the base circle diameter DG2- In addition, the installation length Lp-j of the one valve spring 12 is chosen to be greater than the installation length Lp2 of the other valve spring 12.
  • the base circle diameters DQ of the cams 8 of the camshafts 7, T are the same, while the actuating elements 9 assigned to the inlet valves 2 to the camshafts 7, T are smaller by the angle ⁇ are inclined differently.
  • the actuating elements 9 assigned to the inlet valves 2 to the camshafts 7, T are smaller by the angle ⁇ are inclined differently.
  • the rod ends 11 of the hydraulic support elements 10 are arranged somewhat offset in height. Such an offset in the height of the joint heads 11 is achieved in the case of the inclined support elements 10 shown by a displacement.
  • FIG. 5 shows a section through the outlet valves 3 according to the second embodiment of the invention.
  • the basic circle diameters DG of the cams 8 of the camshafts 7, T are of the same size and the actuating levers 9 are inclined differently by the angle ⁇ but in the opposite way.
  • one valve spring 12 is greater than the installation length Lp2 of the other valve spring 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

Dans le but d'accroître le caractère compact et la facilité de montage de la culasse, l'invention concerne une culasse (1) d'un moteur à combustion interne multicylindre, comportant au moins deux soupapes d'admission (2) et deux soupapes d'échappement (3) par cylindre (4). Le centre (5) de la tête des soupapes d'admission (2) et le centre (5') de la tête des soupapes d'échappement (3) ne se trouvent pas à la même distance par rapport à la médiatrice (M) de la culasse (1). Dans un premier mode de réalisation, cette culasse est perfectionnée en ce que les soupapes d'admission (2) et les soupapes de sortie (3) sont commandées par deux arbres à cames (7, 7'), en ce qu'un nombre d'éléments d'actionnement identiques (9) sont disposés entre les soupapes (2, 3) et les cames (8) des arbres à cames (7, 7'), et en ce que les cames (8) des arbres à cames (7, 7') associées aux soupapes (2, 3) présentent des diamètres de base (DG1, DG2) différents. Dans un deuxième mode de réalisation de l'invention, la culasse (1) peut également être perfectionnée en ce que les soupapes d'admission (2) et les soupapes d'échappement (3) sont commandées par deux arbres à cames (7, 7'), en ce qu'un nombre d'éléments d'actionnement identiques (9) sont disposés entre les soupapes (2, 3) et les cames (8) des arbres à cames (7, 7'), et en ce que les éléments d'actionnement (9) associés aux soupapes (2, 3) sont inclinés par rapport aux arbres à cames (7, 7') à des degrés très différents.
EP97918132A 1996-05-22 1997-04-14 Culasse pour moteur a combustion interne multicylindre Expired - Lifetime EP0900327B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19620546 1996-05-22
DE19620546A DE19620546A1 (de) 1996-05-22 1996-05-22 Zylinderkopf für eine mehrzylindrige Brennkraftmaschine
PCT/EP1997/001848 WO1997044576A1 (fr) 1996-05-22 1997-04-14 Culasse pour moteur a combustion interne multicylindre

Publications (2)

Publication Number Publication Date
EP0900327A1 true EP0900327A1 (fr) 1999-03-10
EP0900327B1 EP0900327B1 (fr) 1999-11-17

Family

ID=7794974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97918132A Expired - Lifetime EP0900327B1 (fr) 1996-05-22 1997-04-14 Culasse pour moteur a combustion interne multicylindre

Country Status (4)

Country Link
EP (1) EP0900327B1 (fr)
CN (1) CN1080822C (fr)
DE (2) DE19620546A1 (fr)
WO (1) WO1997044576A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2455727A1 (fr) 2010-11-23 2012-05-23 Kessel AG Séparateur de matière légère

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19801606A1 (de) * 1998-01-17 1999-07-22 Audi Ag Zylinderkopf
KR20010037508A (ko) * 1999-10-18 2001-05-07 이계안 디오에치시 디젤 엔진
DE102006042912A1 (de) * 2006-09-13 2008-03-27 Volkswagen Ag Brennkraftmaschine mit gemischten Nockenwellen
CN101457662B (zh) * 2007-12-13 2011-03-16 财团法人工业技术研究院 可变阀机构
CN108590795A (zh) * 2018-05-07 2018-09-28 哈尔滨工程大学 一种可以形成进气涡流的柴油机气阀机构
DE102024110311A1 (de) 2024-04-12 2025-10-16 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Reihen-Verbrennungsmotor
CN119957342A (zh) * 2025-04-11 2025-05-09 龙口中宇热管理系统科技有限公司 一种发动机液压可变进气门相异升程机构及发动机

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1751401A1 (de) * 1968-05-24 1971-02-18 Klaue Hermann Vierventiliger Zylinderkopf fuer Brennkraftmaschinen
DE2025304A1 (de) * 1970-05-23 1971-12-09 Daimler-Benz Ag, 7000 Stuttgart Ventilsteuerung für einen schnell laufenden Viertakt-Verbrennungsmotor mit mehr als zwei Ventilen je Zylinder
DE2938823T5 (de) * 1978-03-03 1981-01-08 Caterpillar Tractor Co Multi-inlet air flow passage arrangement for diesel engines
ES8704585A1 (es) * 1985-01-29 1987-04-01 Honda Gijutsu Kenkyusho Kk Mejoras introducidas en motores de combustion interna equipados con cilindros de seccion transversal no circular
DE3507767A1 (de) * 1985-03-05 1986-09-11 Knorr-Bremse AG, 8000 München Ladungsdrall- und/oder -turbulenzeinrichtung fuer verbrennungsmotore
JPH0392573A (ja) * 1989-09-05 1991-04-17 Nissan Motor Co Ltd 内燃機関のシリンダヘッド
JP3150353B2 (ja) * 1991-03-18 2001-03-26 マツダ株式会社 エンジンの燃焼室構造
JPH0828284A (ja) * 1994-07-20 1996-01-30 Yamaha Motor Co Ltd ４サイクルエンジンの吸気装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9744576A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2455727A1 (fr) 2010-11-23 2012-05-23 Kessel AG Séparateur de matière légère

Also Published As

Publication number Publication date
CN1219219A (zh) 1999-06-09
DE19620546A1 (de) 1997-11-27
DE59700735D1 (de) 1999-12-23
WO1997044576A1 (fr) 1997-11-27
CN1080822C (zh) 2002-03-13
EP0900327B1 (fr) 1999-11-17

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