EP0568527B1 - Camshaft drive unit for a v-type internal-combustion engine - Google Patents

Camshaft drive unit for a v-type internal-combustion engine Download PDF

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Publication number
EP0568527B1
EP0568527B1 EP91902407A EP91902407A EP0568527B1 EP 0568527 B1 EP0568527 B1 EP 0568527B1 EP 91902407 A EP91902407 A EP 91902407A EP 91902407 A EP91902407 A EP 91902407A EP 0568527 B1 EP0568527 B1 EP 0568527B1
Authority
EP
European Patent Office
Prior art keywords
drive
cylinders
combustion engine
driven
camshafts
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.)
Expired - Lifetime
Application number
EP91902407A
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German (de)
French (fr)
Other versions
EP0568527A1 (en
Inventor
Alfred Koch
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8165559&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0568527(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0568527A1 publication Critical patent/EP0568527A1/en
Application granted granted Critical
Publication of EP0568527B1 publication Critical patent/EP0568527B1/en
Anticipated expiration legal-status Critical
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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
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • 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
    • F01L1/02—Valve drive
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • F02B2275/08—Endless member is a chain
    • 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]

Definitions

  • the invention relates to a camshaft drive for a V-type internal combustion engine according to the preamble of the main claim.
  • Such an internal combustion engine is shown in US-A-4,957,077.
  • the two rows of cylinders are arranged in a V-shape with respect to one another, the two overhead camshafts of which are each driven by an intermediate shaft also arranged in the cylinder head via a timing chain.
  • the intermediate shafts are each driven by the crankshaft via a chain drive.
  • the two timing chains leading to the intermediate shafts in the cylinder head or their driven wheels on the crankshaft are arranged at a distance from one another which corresponds approximately to the offset of the two rows of cylinders.
  • DE-33 47 638 C discloses an internal combustion engine with rows of cylinders arranged in a V-shape, the two overhead camshafts of which are each driven by a single, double-row timing chain. Due to the overlap of the drive wheels of two adjacent camshafts and due to the offset of the rows of cylinders to one another in the longitudinal direction of the internal combustion engine, no identical camshafts can be used.
  • the invention has for its object to provide a camshaft drive in a generic internal combustion engine, which has the smallest possible number of different components and thereby optimally uses an available space.
  • This camshaft drive enables the use of identical camshafts for both cylinder rows in internal combustion engines with cylinder rows arranged at any angle in a V-shape. This advantage applies in particular to internal combustion engines with several camshafts per row of cylinders. Identical drive wheels designed as identical parts are arranged on all camshafts.
  • the use of identical camshafts is achieved by an offset between the drive wheels arranged on the crankshaft and assigned to the cylinder rows, which offset corresponds to the offset of the cylinder rows to one another.
  • the space thus created between the driven wheels on the crankshaft is used to arrange a gearwheel which drives a spaced-apart crankshaft or an oil pump arranged coaxially with this gearwheel.
  • An internal combustion engine 3 provided with two cylinder rows 1, 2 arranged in a V-shape relative to one another has a crankshaft 4 and overhead camshafts 5, 6 and 7, 8 assigned to the cylinder rows 1 and 2, respectively.
  • the two rows of cylinders 1, 2 have an offset H to one another in the longitudinal direction L of the internal combustion engine 3.
  • a first and a second driven gear 9 and 10 are arranged at a distance A from one another which is approximately the same as the offset H.
  • the driven wheels 9 and 10 drive the camshafts 5, 6 and 7, 8 by means of chains 11 and 12 respectively.
  • the camshafts 5 to 8 each have a drive wheel 13, which is provided with a spacer sleeve 17 and is designed as identical parts.
  • the first drive wheels 13 assigned to a row of cylinders 1 are mounted on the camshafts 5, 6 in such a way that the spacer sleeves 17 face this row of cylinders 1.
  • the spacer sleeves 17 of the second drive wheels 13 are mounted facing away from the other row of cylinders 2, i.e. these second drive wheels 13 are arranged offset by 180 degrees with respect to the first drive wheels 13.
  • a housing 22 of this oil pump 21 is arranged coaxially with the gear 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Described is a camshaft drive unit for an internal-combustion engine (3) with cylinders arranged in a vee. The camshaft drive unit has two output pinions (9, 10) mounted on the camshaft (4), each output pinion operating in conjunction with one of the rows of cylinders (12). The distance (A) between the output pinions corresponds to the distance (H) by which the two rows of cylinders are staggered with respect to each other and permits the use of identical components.

Description

Die Erfindung betrifft einen Nockenwellenantrieb für eine V-Brennkraftmaschine gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a camshaft drive for a V-type internal combustion engine according to the preamble of the main claim.

Eine derartige Brennkraftmaschine ist in der US-A-4,957,077 dargestellt. Bei dieser Brennkraftmaschine sind die beiden Zylinderreihen V-förmig zueinander angeordnet, deren jeweils zwei obenliegende Nockenwellen von einer ebenfalls im Zylinderkopf angeordneten Zwischenwelle über eine Steuerkette angetrieben werden. Die Zwischenwellen werden jeweils über einen Kettentrieb von der Kurbelwelle angetrieben. Die beiden zu den Zwischenwellen im Zylinderkopf führenden Steuerketten bzw. deren Abtriebsräder auf der Kurbelwelle sind mit einem Abstand zueinander angeordnet, der etwa dem Versatz der beiden Zylinderreihen entspricht.Such an internal combustion engine is shown in US-A-4,957,077. In this internal combustion engine, the two rows of cylinders are arranged in a V-shape with respect to one another, the two overhead camshafts of which are each driven by an intermediate shaft also arranged in the cylinder head via a timing chain. The intermediate shafts are each driven by the crankshaft via a chain drive. The two timing chains leading to the intermediate shafts in the cylinder head or their driven wheels on the crankshaft are arranged at a distance from one another which corresponds approximately to the offset of the two rows of cylinders.

Weiterhin ist in der DE-33 47 638 C eine Brennkraftmaschine mit V-förmig zueinander angeordneten Zylinderreihen offenbart, deren jeweils zwei obenliegende Nockenwellen von einer einzigen, doppelreihigen Steuerkette angetrieben werden. Aufgrund der Überschneidung der Antriebsräder von je zwei benachbarten Nockenwellen und aufgrund des Versatzes der Zylinderreihen zueinander in Längsrichtung der Brennkraftmaschine können keine identischen Nockenwellen verwendet werden.Furthermore, DE-33 47 638 C discloses an internal combustion engine with rows of cylinders arranged in a V-shape, the two overhead camshafts of which are each driven by a single, double-row timing chain. Due to the overlap of the drive wheels of two adjacent camshafts and due to the offset of the rows of cylinders to one another in the longitudinal direction of the internal combustion engine, no identical camshafts can be used.

Zwei identische, um 180 ° zueinander gedrehte Zylinderköpfe bei einer V-Brennkraftmaschine zu verwenden, ist bekannt aus der DE-88 13 425 U. Aufgrund des Antriebes einer Nockenwelle jeder Zylinderreihe an einer Stirnseite der Brennkraftmaschine sind diese Nockenwellen unterschiedlich ausgeführt.To use two identical cylinder heads rotated by 180 ° with one another in a V-type internal combustion engine is known from DE-88 13 425 U. Because of the drive of a camshaft of each row of cylinders on one end face of the internal combustion engine, these camshafts are designed differently.

Der Erfindung liegt die Aufgabe zugrunde, einen Nockenwellenantrieb bei einer gattungsgemäßen Brennkraftmaschine zu schaffen, der eine möglichst geringe Anzahl unterschiedlicher Bauteile aufweist und dabei einen vorhandenen Bauraum optimal ausnutzt.The invention has for its object to provide a camshaft drive in a generic internal combustion engine, which has the smallest possible number of different components and thereby optimally uses an available space.

Die Lösung dieser Aufgabe gelingt mit den Merkmalen des Hauptanspruches. Dieser Nockenwellenantrieb ermöglicht bei Brennkraftmaschinen mit in beliebigem Winkel V-förmig zueinander angeordneten Zylinderreihen die Verwendung von identischen Nockenwellen für beide Zylinderreihen. Dieser Vorteil gilt insbesondere für Brennkraftmaschinen mit mehreren Nockenwellen pro Zylinderreihe. Auf allen Nockenwellen sind identische, als Gleichteile ausgebildete Antriebsräder angeordnet. Die Verwendung identischer Nockenwellen wird erzielt durch einen Versatz zwischen den auf der Kurbelwelle angeordneten, den Zylinderreihen zugeordneten Antriebsrädern, der dem Versatz der Zylinderreihen zueinander entspricht. In vorteilhafter Ausgestaltung der Erfindung wird der dadurch zwischen den Abtriebsrädern entstehende Bauraum auf der Kurbelwelle zur Anordnung eines Zahnrades benutzt, welches eine beabstandet zur Kurbelwelle oder eine koaxial zu diesem Zahnrad angeordnete Ölpumpe antreibt.This object is achieved with the features of the main claim. This camshaft drive enables the use of identical camshafts for both cylinder rows in internal combustion engines with cylinder rows arranged at any angle in a V-shape. This advantage applies in particular to internal combustion engines with several camshafts per row of cylinders. Identical drive wheels designed as identical parts are arranged on all camshafts. The use of identical camshafts is achieved by an offset between the drive wheels arranged on the crankshaft and assigned to the cylinder rows, which offset corresponds to the offset of the cylinder rows to one another. In advantageous Embodiment of the invention, the space thus created between the driven wheels on the crankshaft is used to arrange a gearwheel which drives a spaced-apart crankshaft or an oil pump arranged coaxially with this gearwheel.

Die Erfindung wird anhand von Figuren beispielhaft erläutert.
Es zeigen:

Fig. 1
eine Ansicht einer V-Brennkraftmaschine,
Fig. 2
einen Schnitt entlang der Linie II-II gemäß Fig. 1 und
Fig. 3
einen schematischen Schnitt entlang der Linie III-III gemäß Fig. 1.
The invention is explained by way of example with reference to figures.
Show it:
Fig. 1
a view of a V-internal combustion engine,
Fig. 2
a section along the line II-II of FIG. 1 and
Fig. 3
a schematic section along the line III-III of FIG. 1st

Eine mit zwei V-förmig zueinander angeordneten Zylinderreihen 1, 2 versehene Brennkraftmaschine 3 weist eine Kurbelwelle 4 sowie den Zylinderreihen 1 bzw. 2 zugeordnete, obenliegende Nockenwellen 5, 6 bzw. 7, 8 auf.An internal combustion engine 3 provided with two cylinder rows 1, 2 arranged in a V-shape relative to one another has a crankshaft 4 and overhead camshafts 5, 6 and 7, 8 assigned to the cylinder rows 1 and 2, respectively.

Die beiden Zylinderreihen 1, 2 weisen in Längsrichtung L der Brennkraftmaschine 3 einen Versatz H zueinander auf. Auf einem Ende der Kurbelwelle sind ein erstes und ein zweites Abtriebsrad 9 und 10 mit einem Abstand A zueinander angeordnet, der dem Versatz H etwa gleich ist.The two rows of cylinders 1, 2 have an offset H to one another in the longitudinal direction L of the internal combustion engine 3. On one end of the crankshaft, a first and a second driven gear 9 and 10 are arranged at a distance A from one another which is approximately the same as the offset H.

Die Abtriebsräder 9 bzw. 10 treiben mittels Ketten 11 bzw. 12 die Nockenwellen 5, 6 bzw. 7, 8 an. Hierzu weisen die Nockenwellen 5 bis 8 jeweils ein Antriebsrad 13 auf, welche mit einer Distanzhülse 17 versehen und als Gleichteile ausgebildet sind. Die der einen Zylinderreihe 1 zugeordneten ersten Antriebsräder 13 sind so auf den Nockenwellen 5, 6 montiert, daß die Distanzhülsen 17 dieser Zylinderreihe 1 zugewandt sind. Die Distanzhülsen 17 der zweiten Antriebsräder 13 sind von der anderen Zylinderreihe 2 abgewandt montiert, d.h. diese zweiten Antriebsräder 13 sind um 180 Grad gegenüber den ersten Antriebsräder 13 versetzt angeordnet.The driven wheels 9 and 10 drive the camshafts 5, 6 and 7, 8 by means of chains 11 and 12 respectively. For this purpose, the camshafts 5 to 8 each have a drive wheel 13, which is provided with a spacer sleeve 17 and is designed as identical parts. The first drive wheels 13 assigned to a row of cylinders 1 are mounted on the camshafts 5, 6 in such a way that the spacer sleeves 17 face this row of cylinders 1. The spacer sleeves 17 of the second drive wheels 13 are mounted facing away from the other row of cylinders 2, i.e. these second drive wheels 13 are arranged offset by 180 degrees with respect to the first drive wheels 13.

Zwischen den beiden Abtriebsrädern 9, 10 ist auf der Kurbelwelle 4 als ein weiterer Abtrieb ein Zahnrad 20 angeordnet, welches einen Teil einer als Sichelpumpe ausgebildeten Ölpumpe 21 bildet. Ein Gehäuse 22 dieser Ölpumpe 21 ist koaxial zu dem Zahnrad 20 angeordnet.A gear 20, which forms part of an oil pump 21 designed as a sickle pump, is arranged on the crankshaft 4 as a further output between the two driven wheels 9, 10. A housing 22 of this oil pump 21 is arranged coaxially with the gear 20.

Claims (4)

  1. A camshaft drive for a V-type internal-combustion engine with at least one overhead camshaft per row of cylinders, wherein driving gearwheels mounted on the camshafts are each driven by a driven gearwheel mounted rotationally fixed on a crankshaft, wherein a first driven gearwheel is drivingly connected to the camshafts of one row of cylinders and a second driven gearwheel to the camshafts of the other row of cylinders, and the driven gearwheels are mounted at a distance from each other on the crankshaft, the said distance being substantially equal to an offset between the two rows of cylinders in the longitudinal direction of the internal-combustion engine, characterized in that all the driving gearwheels (13) are constructed as identical parts and a further take-off drive (20) is arranged between the two driven gearwheels (9, 10).
  2. A drive according to Claim 1, characterized in that the driving gearwheels (13) are provided with a spacer sleeve (17), wherein the spacer sleeves (17) of the first driving gearwheels (13) associated with one cylinder row (1) are arranged facing towards the said cylinder row (1), and the spacer sleeves (17) of the second driving gearwheels (13) are arranged facing away from the other cylinder row (2).
  3. A drive according to Claim 1, characterized in that the further take-off drive (20) drives a subsidiary drive unit constructed as an oil pump (21) arranged at a distance from the crankshaft (4).
  4. A drive according to Claim 3, characterized in that a housing (22) of the oil pump (21) is arranged coaxially with the further take-off drive (20).
EP91902407A 1991-01-26 1991-01-26 Camshaft drive unit for a v-type internal-combustion engine Expired - Lifetime EP0568527B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1991/000151 WO1992013177A1 (en) 1991-01-26 1991-01-26 Camshaft drive unit for a v-type internal-combustion engine

Publications (2)

Publication Number Publication Date
EP0568527A1 EP0568527A1 (en) 1993-11-10
EP0568527B1 true EP0568527B1 (en) 1995-11-15

Family

ID=8165559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91902407A Expired - Lifetime EP0568527B1 (en) 1991-01-26 1991-01-26 Camshaft drive unit for a v-type internal-combustion engine

Country Status (5)

Country Link
US (1) US5386808A (en)
EP (1) EP0568527B1 (en)
JP (1) JP2962826B2 (en)
DE (1) DE59106923D1 (en)
WO (1) WO1992013177A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3617118B2 (en) * 1995-04-28 2005-02-02 いすゞ自動車株式会社 DOHC engine
US8342993B2 (en) * 2001-11-27 2013-01-01 Litens Automotive Partnership Synchronous drive apparatus
US7168405B2 (en) * 2004-01-30 2007-01-30 Hartley Jr John J Camshaft drive mechanism
FR2882786B1 (en) † 2005-03-01 2007-04-20 Renault Sas INTERNAL COMBUSTION ENGINE HAVING A PINION ARRANGEMENT ON ONE END OF THE CRANKSHAFT
WO2013159199A1 (en) * 2012-04-25 2013-10-31 Litens Automotive Partnership Non-circular rotary component

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3347638A1 (en) * 1983-12-30 1985-07-18 Daimler-Benz Ag, 7000 Stuttgart Drive for two camshafts, arranged in the cylinder head of an internal combustion engine, by means of a flexible mechanism such as a timing chain or toothed belt, from the crankshaft
JPH0727365Y2 (en) * 1988-08-18 1995-06-21 株式会社ユニシアジェックス Valve timing control device for internal combustion engine
DE8813425U1 (en) * 1988-10-26 1988-12-29 Audi Ag, 85057 Ingolstadt Camshaft drive of an internal combustion engine
JPH02169809A (en) * 1988-12-21 1990-06-29 Nissan Motor Co Ltd Cam shaft drive device for dohc engine
JPH02169808A (en) * 1988-12-21 1990-06-29 Nissan Motor Co Ltd Cam shaft drive device for dohc engine
JPH07111146B2 (en) * 1989-02-08 1995-11-29 日産自動車株式会社 Chain cover device for internal combustion engine
JP2709125B2 (en) * 1989-02-15 1998-02-04 ヤマハ発動機株式会社 V-type engine
JPH02241928A (en) * 1989-03-15 1990-09-26 Nissan Motor Co Ltd Chain cover device for v-shaped engine
DE3921715A1 (en) * 1989-07-01 1991-01-10 Porsche Ag DEVICE FOR DRIVING TWO OIL PUMPS ON A PISTON PISTON INTERNAL COMBUSTION ENGINE
US5216989A (en) * 1990-11-30 1993-06-08 Mazda Motor Corporation Apparatus for driving various devices by internal combustion engine
US5178108A (en) * 1992-05-15 1993-01-12 Ford Motor Company Camshaft drive for an automotive engine
JPH0625526U (en) * 1992-08-31 1994-04-08 株式会社椿本チエイン Camshaft drive for V-type or horizontally opposed engine

Also Published As

Publication number Publication date
WO1992013177A1 (en) 1992-08-06
JP2962826B2 (en) 1999-10-12
DE59106923D1 (en) 1995-12-21
JPH06504108A (en) 1994-05-12
US5386808A (en) 1995-02-07
EP0568527A1 (en) 1993-11-10

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