EP0974000A1 - Moteur a combustion interne a cylindres multiples comportant deux soupapes d'admission et deux soupapes d'echappement - Google Patents

Moteur a combustion interne a cylindres multiples comportant deux soupapes d'admission et deux soupapes d'echappement

Info

Publication number
EP0974000A1
EP0974000A1 EP98921441A EP98921441A EP0974000A1 EP 0974000 A1 EP0974000 A1 EP 0974000A1 EP 98921441 A EP98921441 A EP 98921441A EP 98921441 A EP98921441 A EP 98921441A EP 0974000 A1 EP0974000 A1 EP 0974000A1
Authority
EP
European Patent Office
Prior art keywords
rocker arm
internal combustion
combustion engine
valves
intake
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
EP98921441A
Other languages
German (de)
English (en)
Other versions
EP0974000B1 (fr
Inventor
Manfred Breitenberger
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.)
Deutz AG
Original Assignee
Deutz 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 Deutz AG filed Critical Deutz AG
Publication of EP0974000A1 publication Critical patent/EP0974000A1/fr
Application granted granted Critical
Publication of EP0974000B1 publication Critical patent/EP0974000B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • Multi-cylinder internal combustion engine with two intake and two exhaust valves
  • the invention relates to a multi-cylinder internal combustion engine with two intake and two exhaust valves, the intake valves on the one hand and the exhaust valves on the other hand are arranged on opposite longitudinal sides of the internal combustion engine, and the intake valves and exhaust valves can be actuated by a camshaft via intake rocker arms or exhaust rocker arms.
  • both the intake rocker arms and the exhaust rocker arms are designed as fork rocker arms, one fork rocker arm actuating two valves of the same name per cylinder and in that the axes of the intake rocker arm and the exhaust rocker arm are offset from one another, preferably one above the other, with preference being given the rocker arms are rotatably mounted in a rocker arm housing mounted on the cylinder head, and wherein a bearing pin is provided per intake rocker arm, which is releasably attached to the rocker arm housing from the side of the cylinder head.
  • the available space in the rocker arm housing can be optimally used if - viewed in the axial direction - the axis of the exhaust rocker arm is arranged obliquely above the axis of the intake rocker arm per cylinder, so that the size of the cylinder head and the rocker arm housing can be significantly reduced.
  • An arrangement in which the axes of the intake rocker arms are arranged in the parting plane between rocker arm housing and cylinder head is particularly space-saving. It can in particular be provided that the exhaust rocker arms of all cylinders of a row of cylinders are mounted on a continuous bearing axis.
  • the valve axes can all be parallel to one another or can also enclose an acute angle.
  • the fork rocker arms When viewed in plan, the fork rocker arms preferably have an asymmetrical shape, as a result of which the push rods for actuating the rocker arms can be spaced relatively far apart.
  • the free space between the pushrods can be used for cylinder head bolts and the fuel supply line.
  • the axes of the intake and exhaust rocker arms are arranged on the side of the intake valves, and the intake channels and the exhaust channels of Extend the side flange surfaces on the exhaust valve side.
  • the intake manifold is arranged above the exhaust manifold, so that all gas exchange lines can be accommodated on one longitudinal side of the engine.
  • the space thus freed up on the opposite engine longitudinal side can be used to accommodate other units, for example the injection pump.
  • a preferred embodiment of the invention provides that the exhaust rocker arms of all cylinders in a row of cylinders are mounted on a continuous shaft. This makes it possible to change the timing of the exhaust valves by turning the shaft. This enables the implementation of an engine brake in a simple manner.
  • the shaft has an eccentric bearing sleeve in the region of the mounting of an exhaust rocker arm and is connected to a rotating device on an end face of the internal combustion engine.
  • a very simple and space-saving embodiment of the invention is characterized in that the bearings of the shaft are formed by bores in the rocker arm housing.
  • the stems of the inlet valves have a shorter length than the stems of the outlet valves, the valve springs of the inlet valves preferably being shorter than the valve springs of the outlet valves. It is also advantageous if the stroke of the exhaust valves is greater than the stroke of the intake valves. Inlet and outlet rocker arms can be designed with different lever ratios.
  • FIG. 1 shows a cross section through the cylinder head and rocker arm housing of the internal combustion engine according to the invention according to section II in FIG. 2
  • FIG. 2 shows a plan view of the rocker arm housing
  • FIG. 3 shows a section through the rocker arm housing according to line III-III in FIG. 2
  • Fig. 4 is a plan view of an intake rocker arm.
  • a rocker arm housing 2 screwed onto a cylinder head 1 an intake rocker arm 4 and an exhaust rocker arm 5 are provided per cylinder, the axes 4a and 5a of which, as can be seen in FIG. 1, are arranged obliquely one above the other.
  • the inlet rocker arms 4 are individually rotatably supported on journals 6 which are screwed onto the rocker arm housing 2 from the side of the cylinder head 1 by means of screws 7.
  • the axis 6a of the journals 6 lies in the parting plane 24 between the cylinder head 1 and the rocker arm housing 2.
  • the exhaust rocker arms 5 are mounted on a shaft 8 which is continuous for all cylinders of a row of cylinders and whose axis is designated 8a. Instead of a shaft 8, a continuous axis can also be provided.
  • the shaft 8 can be rotated on one end face via a rotating device 9 (not shown in more detail).
  • the exhaust rocker arms 5 are supported by slightly eccentric sleeves 10. By turning the eccentric sleeves 10, the timing of the exhaust valves 11 can be influenced and an engine braking effect can be achieved.
  • the stems 12b of the intake valves 12 have a lower height than the stems 1 1 b of the exhaust valves 1 1.
  • the valve springs for intake valves 12 and exhaust valves 1 1 can also be different Have lengths.
  • the axis 6a of the journal 6 of the inlet rocker arm 4 and the axis 8a of the shaft 8 of the outlet rocker arm 5 are on one Side of an engine longitudinal plane 14 spanned by the crankshaft axis and the cylinder axes 13.
  • the intake manifold 19 is thus arranged above the exhaust manifold 20.
  • an inlet channel can be passed between the actuating devices for the inlet valves 12.
  • the inlet duct consists of a main duct 30 (FIG. 3), which is partly formed by the rocker arm housing 2, and four sub-ducts, not shown, which each lead to an inlet valve 12 of the two cylinders.
  • One sub-channel is designed as a swirl channel for each cylinder, and one sub-channel is designed as a filling channel.
  • the filling channels start from a common cross-sectional area of a collecting space formed by the main channel 30.
  • the inlet channels 12 of two adjacent cylinders are each arranged symmetrically to a normal plane on the crankshaft axis between the two cylinders.
  • the collecting space and the main duct 30 are located in the parting plane 24 between the rocker arm housing 2 and the cylinder head 1. This makes it possible to manufacture the rocker arm housing 2 as a die-cast part.
  • a main channel 30 of the intake system is passed between the bearings of the journals 6. As described above, it branches symmetrically in a total of four sub-channels to supply two adjacent cylinders. 2 and 4, the intake rocker arms 4 and the exhaust rocker arms 5 have an asymmetrical layout, so that a free space is formed between the push rods 21 and 22 for the intake rocker arm 4 and the exhaust rocker arm 5 in the region of the engine transverse plane 23, which can be used, for example, to accommodate a fuel supply line, not shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

L'invention concerne un moteur à combustion interne à cylindres multiples comportant deux soupapes d'admission et deux soupapes d'échappement (12, 11), les soupapes d'échappement (11) étant situées d'un côté et les soupapes d'admission (12) étant situées de l'autre côté sur des faces longitudinales opposées du moteur. Les soupapes d'échappement (11) comme les soupapes d'admission (12) sont actionnées par un arbre à cames par l'intermédiaire de culbuteurs d'admission (4) et de culbuteurs d'échappement (5). Dans le but de réduire la dimension de la culasse (1) et du carter de culbuteurs (2), les culbuteurs d'admission (4) ainsi que les culbuteurs d'échappement (5) se présentent sous la forme de culbuteurs fourchés, chaque culbuteur fourché (4, 5) actionnant deux soupapes homologues (12, 11) par cylindre (13), et les axes (4a, 5a) des culbuteurs d'admission (4) ou des culbuteurs d'échappement (5) ne sont pas dans le même plan, mais sont de préférence superposés.
EP98921441A 1997-04-09 1998-04-08 Moteur a combustion interne a cylindres multiples comportant deux soupapes d'admission et deux soupapes d'echappement Expired - Lifetime EP0974000B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT60697 1997-04-09
AT0060697A AT410242B (de) 1997-04-09 1997-04-09 Mehrzylinder-brennkraftmaschine mit zwei einlass- und zwei auslassventilen
PCT/EP1998/002034 WO1998045579A1 (fr) 1997-04-09 1998-04-08 Moteur a combustion interne a cylindres multiples comportant deux soupapes d'admission et deux soupapes d'echappement

Publications (2)

Publication Number Publication Date
EP0974000A1 true EP0974000A1 (fr) 2000-01-26
EP0974000B1 EP0974000B1 (fr) 2002-12-11

Family

ID=3495047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98921441A Expired - Lifetime EP0974000B1 (fr) 1997-04-09 1998-04-08 Moteur a combustion interne a cylindres multiples comportant deux soupapes d'admission et deux soupapes d'echappement

Country Status (7)

Country Link
US (1) US6205966B1 (fr)
EP (1) EP0974000B1 (fr)
JP (1) JP2000513068A (fr)
CN (1) CN1095027C (fr)
AT (1) AT410242B (fr)
DE (1) DE59806629D1 (fr)
WO (1) WO1998045579A1 (fr)

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US4096957A (en) * 1977-07-18 1978-06-27 Caterpillar Tractor Co. Pivot pin assembly
US6349688B1 (en) * 2000-02-18 2002-02-26 Briggs & Stratton Corporation Direct lever overhead valve system
US20030098965A1 (en) * 2001-11-29 2003-05-29 Mike Binnard System and method for supporting a device holder with separate components
US6505589B1 (en) * 2002-02-01 2003-01-14 General Motors Corporation Single cam three-valve engine overhead valve train
US6895925B2 (en) * 2002-09-18 2005-05-24 Daimlerchrysler Corporation Internal combustion engine having three valves per cylinder
JP2009243401A (ja) * 2008-03-31 2009-10-22 Honda Motor Co Ltd ４サイクルエンジンにおけるシリンダヘッド構造
US8220429B2 (en) * 2009-07-23 2012-07-17 Briggs & Stratton Corporation Overhead valve and rocker arm configuration for a small engine
CN102337941A (zh) * 2011-09-27 2012-02-01 上海北星实业有限公司 一种引擎上的配气机构
CN103423015A (zh) * 2012-05-15 2013-12-04 安徽华菱汽车有限公司 一种内燃机及其活塞
DE102013103553A1 (de) * 2013-04-09 2014-10-09 Fev Gmbh Ventilsteuerung für wenigstens zwei Hubventile
CN107939467B (zh) * 2017-12-28 2023-12-15 潍柴动力股份有限公司 气门进排气摇臂结构及柴油机

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US1301007A (en) * 1917-02-20 1919-04-15 Laurel Motors Corp Control means for intakes and exhausts of internal-combustion engines.
DE340800C (de) * 1918-04-08 1921-09-19 Louis Renault Schwinghebelsteuerung fuer Explosionsmotoren mit zwei Einlass- und Auslassventilen
US1528568A (en) * 1921-10-03 1925-03-03 Laurel Motors Corp Valve construction for internal-combustion engines
US2650578A (en) * 1949-02-12 1953-09-01 Daub Rudolph Air cooling for internal-combustion engines
AT188548B (de) * 1954-06-25 1957-01-25 Simmering Graz Pauker Ag Ventilsteuerung für Brennkraftmaschinen
DE1242045B (de) * 1966-08-20 1967-06-08 Daimler Benz Ag Ventilsteuerung fuer eine Kolbenbrennkraftmaschine
DE1800774A1 (de) * 1968-10-03 1970-06-25 Maschf Augsburg Nuernberg Ag Einrichtung an fluessigkeitsgekuehlten Zylinderdeckeln von Brennkraftmaschinen
GB1279977A (en) 1968-12-14 1972-06-28 Vauxhall Motors Ltd Internal combustion engine valve actuator mechanism
DE2025305A1 (de) * 1970-05-23 1971-12-09 Daimler-Benz Ag, 7000 Stuttgart Ventilsteuerung
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
US3967601A (en) * 1974-09-07 1976-07-06 Motoren- Und Turbinen-Union Friedrichshafen Gmbh Valve control
FR2578907B1 (fr) * 1985-03-13 1989-06-16 Peugeot Dispositif d'actionnement de soupapes dans un moteur a combustion interne comportant quatre soupapes inclinees en v et une bougie centrale par cylindre
AT394249B (de) * 1985-05-22 1992-02-25 Avl Verbrennungskraft Messtech Brennkraftmaschine
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US5007387A (en) * 1990-01-29 1991-04-16 Masachika Arao Four valve per cylinder engine head
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Title
See references of WO9845579A1 *

Also Published As

Publication number Publication date
WO1998045579A1 (fr) 1998-10-15
CN1239532A (zh) 1999-12-22
AT410242B (de) 2003-03-25
DE59806629D1 (de) 2003-01-23
EP0974000B1 (fr) 2002-12-11
ATA60697A (de) 2002-07-15
US6205966B1 (en) 2001-03-27
CN1095027C (zh) 2002-11-27
JP2000513068A (ja) 2000-10-03

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