EP0344599A1 - Hubkolben-Brennkraftmaschine mit obenliegenden Steuerwellen in einem Mehrventil-Zylinderkopf - Google Patents

Hubkolben-Brennkraftmaschine mit obenliegenden Steuerwellen in einem Mehrventil-Zylinderkopf Download PDF

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Publication number
EP0344599A1
EP0344599A1 EP89109346A EP89109346A EP0344599A1 EP 0344599 A1 EP0344599 A1 EP 0344599A1 EP 89109346 A EP89109346 A EP 89109346A EP 89109346 A EP89109346 A EP 89109346A EP 0344599 A1 EP0344599 A1 EP 0344599A1
Authority
EP
European Patent Office
Prior art keywords
valves
combustion engine
cylinder
combustion chamber
valve
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Withdrawn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
EP89109346A
Other languages
German (de)
English (en)
French (fr)
Inventor
Paul Rosche
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0344599A1 publication Critical patent/EP0344599A1/de
Withdrawn legal-status Critical Current

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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
    • F02F1/4221—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder particularly for three or more inlet 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
    • 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
    • F01L1/265—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 peculiar to machines or engines with three or more intake 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into 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
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • the invention relates to a reciprocating internal combustion engine of the type described in the preamble of claim 1.
  • Such an internal combustion engine with five valves per combustion chamber is known from US Pat. No. 4,624,222, three valves serving for the inlet.
  • Two control shafts arranged in the cylinder head on both sides of a cylinder center plane actuate a group of valves of the same type.
  • Two of the three intake valves are arranged near the cylinder center plane, while the third intake valve is arranged pivoted about the axis of the intake valve control shaft away from the cylinder center plane in the direction of the edge of the cylinder bore. This closes the end face of the valve plate of the third inlet valve e.g. with the cylinder head separating surface a smaller angle than the end faces of the valve plates of the two first-mentioned intake valves.
  • valve disks for the intake valves result in accordance with the large cross sections of the intake ducts. This can be the case with valve disks that are relatively large in relation to the diameter of the cylinder bore cause that they form a significant proportion of the area on the cylinder head-side combustion chamber boundary.
  • the invention has for its object to show an arrangement with three similar poppet valves in about a half of the combustion chamber limit for designing a favorable combustion chamber for a reciprocating piston internal combustion engine of the type described above.
  • the advantage of the invention is that the zone of the combustion chamber limitation on the cylinder head side with the valve disks of the two intake valves with the zone adjacent to the cylinder side with the valve disk of the third intake valve includes a relatively large obtuse angle on the cylinder side, the latter zone, for example, to a cylinder head separating surface at a relative angle large acute angle is arranged. So that's one complete whirling of the combustion chamber section under the valve plate of the third inlet valve is achieved with complete blowing of the charge.
  • the invention advantageously enables the two zones in the approximately half combustion chamber boundary to be matched in sections to the contour of a combustion chamber which is lenticular in cross section and which is known for favorable charge combustion.
  • next subclaims relate to geometrical information on the surface design of the combustion chamber delimitation in the area of the three poppet valves, which are preferably used for the inlet, the respective zone of the combustion chamber delimitation having one or two valve disks being flat or cylindrical or spherical.
  • a compact construction of the cylinder head is achieved by means of conical cams on the control shaft controlling the two identical valves.
  • a compact design of the cylinder head with a flat combustion chamber bowl in the bottom of the cylinder head is served by the features of further subclaims, the two control shafts provided for a 5-valve cylinder head for driving the three intake valves being arranged in the smallest possible mutual center distance.
  • the smallest possible center distance can be determined in particular by the cam height. This allows one of the control shafts to be driven by the other via small-diameter gear wheels.
  • a reciprocating internal combustion engine 1 is equipped with a cylinder head 2, which is equipped with three intake valves 4, 4 ', 4' and two exhaust valves 5, 5 'per combustion chamber 3.
  • the exhaust valves 5, 5 ' are arranged with their valve disks 50, 50' in the half of the combustion chamber delimitation 30 lying on this side of the cylinder center plane E ZM .
  • An overhead control shaft 6 actuates the exhaust valves 5, 5 '.
  • the inlet valves 4, 4 ', 4 ⁇ with their valve disks 40, 40', 40 ⁇ are arranged.
  • the aforementioned valve plate form a substantial proportion of the area of half the combustion chamber boundary 30.
  • FIG. 2 shows that the inlet valves 4 and 4 'with their axes 7 and 7' are in a common plane E V , which are 1 with the cylinder center plane E ZM in the area of the cylinder 8 cuts at an acute angle " ⁇ ".
  • An overhead control shaft 9 actuates the inlet valves 4 and 4 '.
  • the third inlet valve 4 ⁇ is with its valve plate 40 ⁇ between which the inlet valves 4, 4 'arranged approximately centrally and offset to the edge of the cylinder 8, Fig. 2.
  • the third inlet valve 4 ⁇ is with its axis 10 under one point Angle " ⁇ " to the plane E V of the two intake valves 4, 4 'arranged, the axis 10 and the plane E V intersecting in the region of the cylinder 8.
  • the third inlet valve 4 ⁇ is actuated by a control shaft 11.
  • the angle " ⁇ " between the plane E V and the axis 10 of the third intake valve 4 ⁇ is chosen in size so that the center distance "a" of the drive shafts for driving the three intake valves 4, 4 ', 4 ⁇ provided 9 and 11 is as small as possible considering the given cam height. Both control shafts 9, 11 can be driven in opposite directions via meshing gears (not shown).
  • the axes 7, 7 'and 10 of the three intake valves 4, 4', 4 ⁇ each serve as surface normals for the respective valve disks 40 , 40 ', 40 ⁇ adjacent surface areas of the cylinder head-side combustion chamber limitation 30.

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)
EP89109346A 1988-06-01 1989-05-24 Hubkolben-Brennkraftmaschine mit obenliegenden Steuerwellen in einem Mehrventil-Zylinderkopf Withdrawn EP0344599A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3818635 1988-06-01
DE19883818635 DE3818635A1 (de) 1988-06-01 1988-06-01 Hubkolben-brennkraftmaschine mit obenliegenden steuerwellen in einem mehrventil-zylinderkopf

Publications (1)

Publication Number Publication Date
EP0344599A1 true EP0344599A1 (de) 1989-12-06

Family

ID=6355609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109346A Withdrawn EP0344599A1 (de) 1988-06-01 1989-05-24 Hubkolben-Brennkraftmaschine mit obenliegenden Steuerwellen in einem Mehrventil-Zylinderkopf

Country Status (2)

Country Link
EP (1) EP0344599A1 (enrdf_load_stackoverflow)
DE (1) DE3818635A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111791A (en) * 1989-02-14 1992-05-12 Yamaha Hatsudoki Kabushiki Kaisha Cylinder head and valve train arrangement for multiple valve engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03264727A (ja) * 1990-03-15 1991-11-26 Mazda Motor Corp 多弁エンジンの吸気装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB242919A (en) * 1925-07-10 1925-11-19 Napier & Son Ltd Improvements in or relating to valve operating mechanism for internal combustion engines
GB2058913A (en) * 1979-09-04 1981-04-15 Honda Motor Co Ltd Internal combustion engine
US4624222A (en) * 1984-04-11 1986-11-25 Yamaha Hatsudoki Kabushiki Kaisha Intake valve structure for internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5641419A (en) * 1979-09-10 1981-04-18 Honda Motor Co Ltd Four-cycle internal combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB242919A (en) * 1925-07-10 1925-11-19 Napier & Son Ltd Improvements in or relating to valve operating mechanism for internal combustion engines
GB2058913A (en) * 1979-09-04 1981-04-15 Honda Motor Co Ltd Internal combustion engine
US4624222A (en) * 1984-04-11 1986-11-25 Yamaha Hatsudoki Kabushiki Kaisha Intake valve structure for internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111791A (en) * 1989-02-14 1992-05-12 Yamaha Hatsudoki Kabushiki Kaisha Cylinder head and valve train arrangement for multiple valve engine

Also Published As

Publication number Publication date
DE3818635A1 (de) 1989-12-07
DE3818635C2 (enrdf_load_stackoverflow) 1991-02-21

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