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US20020002875A1 - Flywheel for reciprocating-piston engine - Google Patents

Flywheel for reciprocating-piston engine Download PDF

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Publication number
US20020002875A1
US20020002875A1 US09/170,682 US17068298A US2002002875A1 US 20020002875 A1 US20020002875 A1 US 20020002875A1 US 17068298 A US17068298 A US 17068298A US 2002002875 A1 US2002002875 A1 US 2002002875A1
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US
United States
Prior art keywords
deep
flywheel
drawn
parts
sheet steel
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Granted
Application number
US09/170,682
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US6378207B2 (en
Inventor
Hans A. Kochanowski Dr.
Herbert Matheis
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Motorenfabrik Hatz GmbH and Co KG
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Individual
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Assigned to MOOTORENFABRIK HATZ GMBH & CO. KG reassignment MOOTORENFABRIK HATZ GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOCHANOWSKI, DR. HANS ALFRED, MATHEIS, HERBERT
Assigned to MOTORENFABRIK HATZ GMBH & CO. KG reassignment MOTORENFABRIK HATZ GMBH & CO. KG CORRECTIVE ASSIGNMENT TO CORRECT THE NAME OF THE RECEIVING PARTY PREVIOUSLY RECORDED ON REEL 9519, FRAME 0284. Assignors: KOCHANOWSKI, HANS ALFRED, MATHEIS, HERBERT
Publication of US20020002875A1 publication Critical patent/US20020002875A1/en
Application granted granted Critical
Publication of US6378207B2 publication Critical patent/US6378207B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/30—Flywheels
    • 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
    • F02B75/06—Engines with means for equalising torque
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49481—Wheel making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49764—Method of mechanical manufacture with testing or indicating
    • Y10T29/49771—Quantitative measuring or gauging
    • Y10T29/49776—Pressure, force, or weight determining
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/4984—Retaining clearance for motion between assembled parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2121—Flywheel, motion smoothing-type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2121—Flywheel, motion smoothing-type
    • Y10T74/2132—Structural detail, e.g., fiber, held by magnet, etc.

Definitions

  • the invention relates to a flywheel constructed from a plurality of parts for reciprocating-piston engines, especially hand-cranked diesel engines, and to a process for making same.
  • Such flywheels are normally made of gray cast iron. Additional parts such as a blower ring or a magnetic segmented ring or a starter ring gear can also be joined to the actual flywheel body.
  • DE A 4339421 describes a two-piece flywheel with primary and secondary masses, joined together via a torsional damping device.
  • the structure described therein is intended merely to overcome the problem of increasing the mass moment of inertia on the primary side. Noise reduction is neither intended not achieved with this construction.
  • the object of the present invention is to design the flywheel with simple means such that its noise contribution to the total engine noise is considerably reduced.
  • U.S. Pat. No. 1,264,642 certainly describes a riveted flywheel comprising drop-forged parts, but this does not achieve the object according to the invention, since such a flywheel behaves as a homogeneous body from the viewpoint of sound characteristics.
  • the multi-piece construction of the flywheel can achieve significant reduction of structure-borne sound, an essential aspect being that the parts are joined to each other under initial tension.
  • the parts can be clamped together by bolts, rivets, deep-drawing or a few spot welds.
  • the desired damping effect on propagation of structure-borne sound is achieved in particular in the zone of the contact surfaces of the clamped-together parts.
  • a particularly inexpensive option for making the flywheel comprises the deformation of a flat plate of sheet steel by deep-drawing, in order to obtain a shallow dish with flat bottom and rounded, shallow rim.
  • a deep-drawn part does not have to be balanced, thus permitting further cost savings.
  • the second part is also a deep-drawn part, which is made by deep-drawing together with the first part in one working cycle.
  • the two deep-drawn parts have different material thicknesses; thereby better fit of the surfaces is achieved during deep-drawing.
  • the second deep-drawn part can cover the first part substantially over the entire surface; alternatively, however, it can cover merely an annular section of the first deep-drawn part; both a central annular section and a peripheral annular section are suitable.
  • the second deep-drawn part is nested partly or completely in a wall recess of the first part, there can be achieved a flywheel surface that is more or less closed, whereby airborne noise is abated and whereby further the joint surfaces are enlarged, thus in turn opposing the propagation of structure-borne sound.
  • the parts of the flywheel clamped together by individual bolted, welded or riveted points can form two or more layers, and so the flywheel is made as a kind of sandwich structure.
  • One or more middle layers can then be made of sheet steel that is more readily deformable than the outer layer.
  • FIG. 1 shows an axial section through one half of the flywheel with a two-piece flywheel comprising two deep-drawn parts bearing on one another over part of the surfaces, and
  • FIG. 2 shows an axial section through the lower half of a flywheel comprising two deep-drawn parts clamped together over their entire surface.
  • FIG. 1 shows a reversing-start flywheel 6 , which comprises a first part made as a deep-drawn part 17 from sheet steel, and a second part joined to the first part such that the surfaces bear against one another.
  • Both flywheel parts are made from two deep-drawn parts 17 , 22 clamped together with one another. The two parts are formed together from corresponding sheet-steel blanks by a shared deep-drawing process and thereafter are joined to one another by bolts or a few weld spots.
  • the two deep-drawn parts can be fitted one inside the other as illustrated in FIG. 2, such that the inner deep-drawn part 22 is trapped behind a bent-over rim 23 of the outer deep-drawn part 17 .
  • the inner deep-drawn part 22 it becomes possible for the inner deep-drawn part 22 to be nested in clamped condition between the rim 23 and the shoulder 24 of a recess of the outer deep-drawn part 17 .
  • the flywheel can be assembled from more than two deep-drawn sheets in stacked configuration.
  • the peripheral arrangement of the inner deep-drawn part 22 provides the advantage that a large mass moment of inertia can be achieved with a lightweight flywheel.
  • the inner side of the first deep-drawn part 17 is substantially covered by the second deep-drawn part 25 , or in other words the two deep-drawn parts 17 , 25 bear against one another substantially over their entire surface.
  • the damping effect is extended to the entire flywheel surface and is therefore particularly efficient.
  • the two deep-drawn parts are made by deep-drawing in a shared process.
  • the joined-together deep-drawn parts 17 , 25 are clamped to one another, for example by rivets, bolts, spot welds or fitting one into the other under tension.
  • the damping effect of the two flywheel parts joined together is particularly good in this case, because their joint is disposed close to the point of connection to the crankshaft 2 , which is the source of the structure-borne sound nuisance.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

In a flywheel assembled from a plurality of parts and having greatly reduced noise proportion for reciprocating-piston engines, especially hand-cranked diesel engines, a first part (17) comprises at least one steel plate, which is joined to at least one further part (22) by rivets, bolts, spot welds and/or fitting to achieve bearing contract therewith over an area, such that the parts are clamped against each other.

Description

  • The invention relates to a flywheel constructed from a plurality of parts for reciprocating-piston engines, especially hand-cranked diesel engines, and to a process for making same. [0001]
  • Such flywheels are normally made of gray cast iron. Additional parts such as a blower ring or a magnetic segmented ring or a starter ring gear can also be joined to the actual flywheel body. [0002]
  • In such a flywheel, a certain degree of damping of structure-borne sound is already provided by the joint surfaces. One known reason for conduction of structure-borne sound into the flywheel is the crankshaft joined thereto. The longitudinal, torsional and bending vibrations thereof are transmitted to the flywheel and radiated therefrom as a large-area sound source. The flywheel is therefore responsible for a considerable portion of the entire engine noise. [0003]
  • DE A 4339421 describes a two-piece flywheel with primary and secondary masses, joined together via a torsional damping device. The structure described therein is intended merely to overcome the problem of increasing the mass moment of inertia on the primary side. Noise reduction is neither intended not achieved with this construction. [0004]
  • In contrast, the object of the present invention is to design the flywheel with simple means such that its noise contribution to the total engine noise is considerably reduced. [0005]
  • U.S. Pat. No. 1,264,642 certainly describes a riveted flywheel comprising drop-forged parts, but this does not achieve the object according to the invention, since such a flywheel behaves as a homogeneous body from the viewpoint of sound characteristics. [0006]
  • This object is achieved according to the invention by the features of [0007] claims 1 and 9. Advantageous embodiments are described in the dependent claims.
  • The multi-piece construction of the flywheel can achieve significant reduction of structure-borne sound, an essential aspect being that the parts are joined to each other under initial tension. The parts can be clamped together by bolts, rivets, deep-drawing or a few spot welds. The desired damping effect on propagation of structure-borne sound is achieved in particular in the zone of the contact surfaces of the clamped-together parts. [0008]
  • According to the invention, a particularly inexpensive option for making the flywheel comprises the deformation of a flat plate of sheet steel by deep-drawing, in order to obtain a shallow dish with flat bottom and rounded, shallow rim. In contrast to an embodiment of the flywheel as a cast body, such a deep-drawn part does not have to be balanced, thus permitting further cost savings. [0009]
  • Furthermore, it is provided according to the invention that the second part is also a deep-drawn part, which is made by deep-drawing together with the first part in one working cycle. [0010]
  • According to an advantageous embodiment, the two deep-drawn parts have different material thicknesses; thereby better fit of the surfaces is achieved during deep-drawing. [0011]
  • The second deep-drawn part can cover the first part substantially over the entire surface; alternatively, however, it can cover merely an annular section of the first deep-drawn part; both a central annular section and a peripheral annular section are suitable. [0012]
  • By the fact that the second deep-drawn part is nested partly or completely in a wall recess of the first part, there can be achieved a flywheel surface that is more or less closed, whereby airborne noise is abated and whereby further the joint surfaces are enlarged, thus in turn opposing the propagation of structure-borne sound. [0013]
  • The parts of the flywheel clamped together by individual bolted, welded or riveted points can form two or more layers, and so the flywheel is made as a kind of sandwich structure. One or more middle layers can then be made of sheet steel that is more readily deformable than the outer layer. As a result, not only is it easier to deform the layers in a shared deep-drawing process, but also the damping of structure-borne sound is improved thereby.[0014]
  • Several embodiments of the invention are explained hereinafter with reference to the drawing, wherein [0015]
  • FIG. 1 shows an axial section through one half of the flywheel with a two-piece flywheel comprising two deep-drawn parts bearing on one another over part of the surfaces, and [0016]
  • FIG. 2 shows an axial section through the lower half of a flywheel comprising two deep-drawn parts clamped together over their entire surface.[0017]
  • FIG. 1 shows a reversing-[0018] start flywheel 6, which comprises a first part made as a deep-drawn part 17 from sheet steel, and a second part joined to the first part such that the surfaces bear against one another. Both flywheel parts are made from two deep-drawn parts 17, 22 clamped together with one another. The two parts are formed together from corresponding sheet-steel blanks by a shared deep-drawing process and thereafter are joined to one another by bolts or a few weld spots. To ensure that the inner deep-drawn part 22 comprising the second flywheel part remains joined to the outer deep-drawn part 17 without needing a special joint between the two deep-drawn parts 17, 22, the two deep-drawn parts can be fitted one inside the other as illustrated in FIG. 2, such that the inner deep-drawn part 22 is trapped behind a bent-over rim 23 of the outer deep-drawn part 17. Thereby it becomes possible for the inner deep-drawn part 22 to be nested in clamped condition between the rim 23 and the shoulder 24 of a recess of the outer deep-drawn part 17. In this embodiment of the reversing-start flywheel 6, it is advantageous to provide different material thicknesses for the two deep-drawn parts 17, 22. Moreover, in an alternative version that is not shown, the flywheel can be assembled from more than two deep-drawn sheets in stacked configuration. The peripheral arrangement of the inner deep-drawn part 22 provides the advantage that a large mass moment of inertia can be achieved with a lightweight flywheel.
  • In the embodiment of the reversing-[0019] start flywheel 6 shown in FIG. 2, the inner side of the first deep-drawn part 17 is substantially covered by the second deep-drawn part 25, or in other words the two deep-drawn parts 17, 25 bear against one another substantially over their entire surface. In this case the damping effect is extended to the entire flywheel surface and is therefore particularly efficient. Here also the two deep-drawn parts are made by deep-drawing in a shared process. As in the embodiments described hereinabove, it is an essential aspect in this case that the joined-together deep-drawn parts 17, 25 are clamped to one another, for example by rivets, bolts, spot welds or fitting one into the other under tension. The damping effect of the two flywheel parts joined together is particularly good in this case, because their joint is disposed close to the point of connection to the crankshaft 2, which is the source of the structure-borne sound nuisance.

Claims (10)

1. A flywheel constructed from a plurality of parts for reciprocating-piston engines, especially hand-cranked diesel engines,
characterized in that
a first part (6) of sheet steel, which is deep-drawn together with at least one second part (8, 22, 25) of sheet steel, is joined by rivets, bolts, spot welds and/or fitting to achieve bearing contact over an area, such that the parts forming two or more layers are clamped against each other in order to achieve reduction of structure-borne sound of the flywheel.
2. A flywheel according to claim 1,
characterized in that
the two deep-drawn parts (17, 25) have different material thicknesses.
3. A flywheel according to claim 1,
characterized in that
the two deep-drawn parts (17, 25) bear against one another substantially over their entire surface.
4. A flywheel according to claim 1,
characterized in that
the second deep-drawn part (22) covers merely an annular section of the first deep-drawn part (17).
5. A flywheel according to claim 4,
characterized in that
the second deep-drawn part (22) covers a peripheral annular section of the first deep-drawn part (17), in order to achieve a large mass moment of inertia in a lightweight flywheel (22, 17).
6. A flywheel according to claim 4,
characterized in that
the second deep-drawn part (22) is nested completely or partly in a wall recess of the first deep-drawn part (17).
7. A flywheel according to claim 1,
characterized in that
the first part is constructed as a deep-drawn part (17) in the form of a shallow dish with flat bottom and rounded shallow rim.
8. A flywheel according to claim 7,
characterized in that
the second part is constructed as a flat disk (18) and is fastened inside the bottom onto the dish inside.
9. A process for making a multi-piece flywheel,
characterized in that
a first flywheel part (17) comprising sheet steel is deep-drawn with at least one second flywheel part (22; 25), also comprising sheet steel, in one shared processing step, such that the parts bear against each other over an area and can be clamped against each other during assembly.
10. A process according to claim 9,
characterized in that
one or more layers of easily deformable sheet steel are interposed between the first and second deep-drawn parts in order to obtain a flywheel of sandwich structure in one shared deep-drawing process.
US09/170,682 1996-04-13 1998-10-13 Flywheel for reciprocating-piston engine Expired - Fee Related US6378207B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19614679A DE19614679A1 (en) 1996-04-13 1996-04-13 Flywheel for reciprocating engine
DE19614679 1996-04-13
DE19614679.8 1996-04-13
PCT/EP1997/001227 WO1997039255A1 (en) 1996-04-13 1997-03-11 Flywheel for a piston engine

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/001227 Continuation WO1997039255A1 (en) 1996-04-13 1997-03-11 Flywheel for a piston engine

Publications (2)

Publication Number Publication Date
US20020002875A1 true US20020002875A1 (en) 2002-01-10
US6378207B2 US6378207B2 (en) 2002-04-30

Family

ID=7791219

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/170,682 Expired - Fee Related US6378207B2 (en) 1996-04-13 1998-10-13 Flywheel for reciprocating-piston engine

Country Status (5)

Country Link
US (1) US6378207B2 (en)
EP (1) EP0891502B1 (en)
JP (1) JP2000508412A (en)
DE (2) DE19614679A1 (en)
WO (1) WO1997039255A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070137309A1 (en) * 2005-12-08 2007-06-21 Honeywell International Inc. Out-of-plain strain elimination acoustic wave torque sensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19614679A1 (en) * 1996-04-13 1997-10-16 Hatz Motoren Flywheel for reciprocating engine

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US4354370A (en) * 1980-09-02 1982-10-19 Kessler Products Co., Inc. Method for deep drawing sheet metal
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DE3245910A1 (en) * 1982-12-11 1984-06-14 Hoesch Werke Ag, 4600 Dortmund IMPELLER FOR CHAIN VEHICLES
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DE4345542C2 (en) * 1992-12-10 2003-02-06 Zf Sachs Ag Dual mass flywheel for motor vehicle transmission
US5515745A (en) * 1993-01-27 1996-05-14 Kabushiki Kaisha Daikin Seisakusho Flywheel assembly with annular elastic body for reducing vibrations
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DE4416263A1 (en) * 1993-06-23 1995-01-05 Fichtel & Sachs Ag Hydrodynamic torque converter with lock-up clutch
US5323665A (en) * 1993-07-19 1994-06-28 General Motors Corporation Starting vibration damped flexplate flywheel
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JP3447129B2 (en) * 1994-12-15 2003-09-16 株式会社エクセディ Flexible plate
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JP3534507B2 (en) * 1995-11-16 2004-06-07 株式会社エクセディ Flexible plate mechanism
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070137309A1 (en) * 2005-12-08 2007-06-21 Honeywell International Inc. Out-of-plain strain elimination acoustic wave torque sensor
US7380464B2 (en) * 2005-12-08 2008-06-03 Honeywell International Inc. Out-of-plain strain elimination acoustic wave torque sensor

Also Published As

Publication number Publication date
JP2000508412A (en) 2000-07-04
EP0891502B1 (en) 2001-05-30
WO1997039255A1 (en) 1997-10-23
US6378207B2 (en) 2002-04-30
DE19614679A1 (en) 1997-10-16
EP0891502A1 (en) 1999-01-20
DE59703677D1 (en) 2001-07-05

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