EP0683857A1 - Machine a piston, notamment moteur a combustion interne a piston comportant un bloc-moteur renforce a l'aide de nervures discontinues - Google Patents

Machine a piston, notamment moteur a combustion interne a piston comportant un bloc-moteur renforce a l'aide de nervures discontinues

Info

Publication number
EP0683857A1
EP0683857A1 EP95904443A EP95904443A EP0683857A1 EP 0683857 A1 EP0683857 A1 EP 0683857A1 EP 95904443 A EP95904443 A EP 95904443A EP 95904443 A EP95904443 A EP 95904443A EP 0683857 A1 EP0683857 A1 EP 0683857A1
Authority
EP
European Patent Office
Prior art keywords
engine
piston
engine block
internal combustion
rib
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Withdrawn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
EP95904443A
Other languages
German (de)
English (en)
Inventor
Markus Schwaderlapp
Christian SCHÖNHERR
Thomas Wagner
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.)
FEV Europe GmbH
Original Assignee
FEV Motorentechnik GmbH and Co KG
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 FEV Motorentechnik GmbH and Co KG filed Critical FEV Motorentechnik GmbH and Co KG
Publication of EP0683857A1 publication Critical patent/EP0683857A1/fr
Withdrawn legal-status Critical Current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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/008—Sound insulation
    • 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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0002—Cylinder arrangements
    • F02F7/0007—Crankcases of engines with cylinders in line
    • 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
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders four
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/04—Thermal properties
    • F05C2251/042—Expansivity

Definitions

  • Piston engine in particular piston internal combustion engine with stiffened engine block by means of broken ribs Description:
  • piston engines in particular piston internal combustion engines, are excited to vibrate by the changing processes in the cylinder space, for example by the combustion process, but also by mechanical influences, which are also emitted as sound on the surfaces of the piston engine in the form of airborne noise and / or can be transmitted as structure-borne noise via the bearing of the piston machine into the foundation or the vehicle body in vehicles.
  • attachments and / or additional units such as engine supports, starters, alternators or gas supply lines and gas discharge
  • the invention is based on the object of reducing the vibration and noise development of a piston engine, in particular a piston internal combustion engine, by designing the engine block structure, the total weight not being able to be increased if possible.
  • a piston machine in particular a piston internal combustion engine, in which cylinders, pistons, crankshafts and crankshaft bearings are arranged in an engine block, areas on the engine block being provided with cover-like and / or trough-shaped covers and in which the Walls of the engine block and / or the covers are provided at least in partial areas with rib-shaped reinforcements which are interrupted in their course.
  • the particular advantage of the solution according to the invention is that the freely vibratable outer surfaces of the engine block structure are reduced and the acoustic behavior of the engine block structure is significantly improved. Such ribs lead to an increased jump in impedance at the interruption points and thus in particular to a reduction in the transmission of structure-borne noise.
  • the geometry of the points of interruption may, for example, wedge-shaped or trapezoidal be formed "or be rounded.
  • the covers in the sense of the present invention include, for example, the cylinder head cover, timing gear covers, the crankcase or oil pan and similar elements of the engine structure.
  • the gearbox associated therewith must also be taken into account with regard to the task of reducing the noise, since the walls of, for example, a flanged-on gearbox housing can emit sound.
  • vibration-reducing stiffening can be achieved with an arrangement of components in the wall.
  • the intake and / or exhaust pipes with tubular components on the inside and / or with web-like or rib-shaped components on the outside can be reinforced to reduce vibration, so that these structures, which belong to the engine block in the broader sense, have no or only a lower sound radiation he follows.
  • the rib-shaped reinforcements can consist of the base material of the engine block, for example cast on in the case of cast engine blocks or engine block parts.
  • materials with a higher modulus of elasticity than the base material of the engine block in particular ceramic materials, can be provided for the rib-shaped reinforcements. These have a much higher modulus of elasticity than the gray cast iron or cast aluminum customary as the base material. If gray cast iron is used as the base material, the density of ceramic materials is significantly lower than the density of the base material. When using cast aluminum, the density of ceramic materials is approximately the same. Due to these material properties, stiffening components made of ceramic materials with the same mass can achieve about 12 times the stiffness compared to an identical design made of gray cast iron. With the same rigidity, ribs made of a ceramic material, for example, have about 70% less mass than ribs made of gray cast iron. Another advantage is that with such a rib-like design
  • Components with a predetermined same stiffness due to the higher modulus of elasticity also reduce the geometric dimensions compared to a rib made of the base material, so that the overall volume of the internal combustion engine is reduced. In this way, stiffening measures for noise reduction can be effectively introduced into the components even with a given production system.
  • an engine block 1 of a four-cylinder piston internal combustion engine is shown, the upper portion of which forms the cylinder block 2 and the lower portion of which comprises the upper part of the crankcase 3.
  • the crankcase 3 is enclosed on the underside with a crankcase, not shown here.
  • the cylinder block 2 and the crankcase 3 are designed as one component, in particular in vehicle engines.
  • rib-like reinforcements extending in the longitudinal direction of the internal combustion engine are provided on the cylinder block 2 as well as on the crankcase 3.
  • These rib-like reinforcements 4 can consist of the base material of the engine block 1 and can be integrally connected, for example by the casting process.
  • the reinforcements 4 can also consist of a material that has a higher modulus of elasticity than the base material, preferably of a ceramic material. If the engine block 1 is made, for example, of gray cast iron, then the reinforcements 4 have, for example, an approximately three times higher modulus of elasticity than the base material of gray cast iron and about half the density of the base material. The coefficient of thermal expansion is similar to that of gray cast iron, so that a combination of gray cast iron and ceramic is unproblematic from this point of view. If aluminum is used as the base material, the reinforcements 4 have a 5-fold higher modulus of elasticity than, for example, when using aluminum oxide ceramic the base material with a similar density.
  • such rib-shaped reinforcements 4 made of ceramic have the same dimensional stability when using gray cast iron as the base material and are 70% less mass than ribs made of gray cast iron.
  • Such rib-shaped reinforcements can be arranged on the crankcase 3 both on the outer wall and on the inner wall. In the arrangement shown, the rigidity of the engine block increases, globally and above all locally, in particular with respect to the vertical axis of the engine, so that the generation of vibrations is impeded and the amplitude of vibrations generated in the engine block is reduced.
  • the longitudinally extending rib-shaped reinforcements 4 are interrupted in their longitudinal direction, the interruption 5 preferably being provided in the area of the connection points of the bearing walls with the outer walls of the engine block, that is to say at places where, due to the construction, anyway Wall thickenings are provided.
  • the interrupted rib profiles lead to an increased impedance jump at the interruption points 5 and thus to a reduction in the structure-borne noise transmission.
  • the geometry of the interruption points can be wedge-shaped or trapezoidal, as shown for example for area 5.1, or, as shown for area 5.2, can be rounded.
  • the rib-shaped reinforcements can be provided in the case of larger wall areas on the engine block or also on its diverse cover and / or trough-shaped covers, also in a crosswise arrangement. It is only important that they are interrupted in their longitudinal extension. If the rib-shaped reinforcements are made of a different material than the base material, they can be connected to the relevant areas of the engine block by casting, gluing, soldering or welding.

Landscapes

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

Abstract

L'invention concerne une machine à piston, notamment un moteur à combustion interne à piston qui présente un bloc-moteur (1) regroupant cylindres, pistons, vilebrequin et paliers de vilebrequin. Le bloc-moteur comporte des zones pourvues d'éléments de recouvrement se présentant sous forme de chapeaux et/ou de coupelles. Les parois du bloc-cylindres (2) et/ou des éléments de recouvrement sont pourvues, au moins dans des zones partielles, d'éléments renforçateurs se présentant sous forme de nervures discontinues.
EP95904443A 1993-12-11 1994-12-09 Machine a piston, notamment moteur a combustion interne a piston comportant un bloc-moteur renforce a l'aide de nervures discontinues Withdrawn EP0683857A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9319055U DE9319055U1 (de) 1993-12-11 1993-12-11 Kolbenmaschine, insbesondere Kolbenbrennkraftmaschine mit versteiftem Motorblock mittels unterbrochener Rippen
DE9319055U 1993-12-11
PCT/EP1994/004098 WO1995016120A1 (fr) 1993-12-11 1994-12-09 Machine a piston, notamment moteur a combustion interne a piston comportant un bloc-moteur renforce a l'aide de nervures discontinues

Publications (1)

Publication Number Publication Date
EP0683857A1 true EP0683857A1 (fr) 1995-11-29

Family

ID=6901877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95904443A Withdrawn EP0683857A1 (fr) 1993-12-11 1994-12-09 Machine a piston, notamment moteur a combustion interne a piston comportant un bloc-moteur renforce a l'aide de nervures discontinues

Country Status (4)

Country Link
US (1) US5651340A (fr)
EP (1) EP0683857A1 (fr)
DE (1) DE9319055U1 (fr)
WO (1) WO1995016120A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408260B (de) * 1999-03-19 2001-10-25 Miba Sintermetall Ag Formteil aus leichtmetall, insbesondere kurbelgehäuse für einen verbrennungsmotor
FR2869647B1 (fr) * 2004-04-30 2008-07-18 Peugeot Citroen Automobiles Sa Bloc-cylindres et moteur comportant un tel bloc-cylindres
CN113167190A (zh) 2018-12-19 2021-07-23 卡明斯公司 用于减少衬套变形的独特缸体肋几何形状

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817354A (en) * 1972-06-01 1974-06-18 Gear Co M W Oil pan for tractors
DE2260142C3 (de) * 1972-12-08 1975-12-11 Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Zylinder-Kurbelgehäuse
US3977385A (en) * 1973-06-21 1976-08-31 National Research Development Corporation Internal combustion engines with straight line reinforcing members between cylinder heads and main bearings
JPS5823492B2 (ja) * 1977-11-17 1983-05-16 日産自動車株式会社 自動車用低騒音エンジン
AT375444B (de) * 1977-12-07 1984-08-10 Steyr Daimler Puch Ag Hubkolben-brennkraftmaschine
EP0152857B1 (fr) * 1980-10-07 1990-04-11 Nissan Motor Co., Ltd. Bloc-cylindre d'un moteur
JPS593180Y2 (ja) * 1980-11-26 1984-01-28 日産自動車株式会社 内燃機関のシリンダブロツク
JPS57179355A (en) * 1981-04-28 1982-11-04 Nissan Motor Co Ltd Cylinder block
JPS57198338U (fr) * 1981-06-11 1982-12-16
JPS5874851A (ja) * 1981-10-28 1983-05-06 Toyota Motor Corp アルミニウム合金製シリンダブロツク
IT1182082B (it) * 1984-12-13 1987-09-30 Honda Motor Co Ltd Struttura di blocco clindri per motore a combustione interna a piu' cilindri
DE3633261C1 (de) * 1986-09-30 1987-05-21 Bayerische Motoren Werke Ag Gegossenes Maschinengehaeuse fuer fluessigkeitsgekuehlte Brennkraftmaschinen mit V-foermiger Zylinderanordnung
JPH088282Y2 (ja) * 1988-04-06 1996-03-06 日産自動車株式会社 内燃機関のｖ型シリンダブロック
DE4017139C2 (de) * 1990-05-28 1999-04-15 Deutz Ag Brennkraftmaschine
US5218938A (en) * 1992-11-02 1993-06-15 General Motors Corporation Structural oil pan for internal combustion engine
US5253615A (en) * 1992-12-24 1993-10-19 Ford Motor Company Cylinder block cylinder bore isolator
KR100285438B1 (ko) * 1993-11-01 2001-04-02 정몽규 내연기관

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9516120A1 *

Also Published As

Publication number Publication date
WO1995016120A1 (fr) 1995-06-15
DE9319055U1 (de) 1995-04-13
US5651340A (en) 1997-07-29

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