EP1985820A1 - Tubulure d'echappement en acier coule resistant a la chaleur - Google Patents
Tubulure d'echappement en acier coule resistant a la chaleur Download PDFInfo
- Publication number
- EP1985820A1 EP1985820A1 EP07714523A EP07714523A EP1985820A1 EP 1985820 A1 EP1985820 A1 EP 1985820A1 EP 07714523 A EP07714523 A EP 07714523A EP 07714523 A EP07714523 A EP 07714523A EP 1985820 A1 EP1985820 A1 EP 1985820A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flanges
- ports
- exhaust manifold
- heat
- cast steel
- 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
Links
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 19
- 238000005266 casting Methods 0.000 description 9
- 238000003754 machining Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1861—Construction facilitating manufacture, assembly, or disassembly the assembly using parts formed by casting or moulding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2530/00—Selection of materials for tubes, chambers or housings
Definitions
- the present invention relates to an exhaust manifold made of heat-resistant cast steel, which can be produced with a small number of steps at a high yield, and has small weight and excellent thermal deformation resistance.
- the exhaust manifold for gathering an exhaust gas from an engine and sending it to an exhaust pipe comprises pluralities of flanges each having a hole connected to each exhaust port of a cylinder head of an engine with bolts, a port connected to each flange, and a convergence portion in which pluralities of ports are converging.
- the flanges are generally thicker than the ports in the exhaust manifold ( Fig. 2 ) as described in JP 10-26018 A .
- the flanges have an average thickness of about 12 mm, and the ports have an average thickness of about 5 mm. In casting such exhaust manifold, voids are likely generated in the finally solidified flanges.
- each flange is provided with a riser 6 as shown in Fig. 3 , so that a melt is supplied to the flange during solidification.
- risers are not used as part of the products, resulting in a lower yield per the melt used. Further, risers should be removed after casting, a larger number of steps is needed.
- an object of the present invention is to provide an exhaust manifold made of heat-resistant cast steel, which can be produced with a small number of steps at a high yield, and has small weight and excellent thermal deformation resistance.
- the exhaust manifold of the present invention made of heat-resistant cast steel comprises pluralities of flanges each having a hole connected to each exhaust port of a cylinder head of an engine with bolts, pluralities of ports connected to the flanges, and a convergence portion in which the ports are converging, the thickness of the flanges being 80-150% of that of the ports.
- Hole-surrounding portions are preferably 110-300% as thick as the flanges.
- the exhaust manifold preferably has a ridge extending along each port from the convergence portion.
- the thickness of the ridges is 70-140% of that of the ports.
- Fig. 1(a) is a schematic plan view showing the exhaust manifold of the present invention made of heat-resistant cast steel.
- Fig. 1(b) is a cross-sectional view taken along the line A-A in Fig. 1(a) .
- Fig. 2(a) is a schematic plan view showing a conventional exhaust manifold.
- Fig. 2(b) is a cross-sectional view taken along the line B-B in Fig. 2(a) .
- Fig. 3 is a schematic view showing a riser provided for casting a conventional exhaust manifold.
- Fig. 4(a) is a schematic plan view showing a preferred example of the exhaust manifolds of the present invention made of heat-resistant cast steel.
- Fig. 4(b) is a schematic front view showing another preferred example of the exhaust manifolds of the present invention made of heat-resistant cast steel.
- Fig. 4(c) is a schematic side view showing a further preferred example of the exhaust manifolds of the present invention made of heat-resistant cast steel.
- Fig. 5 is a cross-sectional view showing a ridge.
- the thickness of flanges, ports and bolthole-surrounding portions is expressed by an average value.
- the bolthole-surrounding portion in the flange has a thickness t 3 as shown in Fig. 1(b) .
- the ridge has a thickness t 4 in a cross section perpendicular to a longitudinal direction as shown in Fig. 5 .
- each flange 2 need not be provided with a riser, making it possible to produce the exhaust manifold with a smaller number of steps at a higher yield.
- the thickness of the flanges 2 is less than 80% of that of the ports 3, the flanges 2 are not easily filled with a melt, resulting in insufficient melt flow.
- the flanges 2 are more than 150% as thick as the ports 3, the flanges 2 are likely to have voids.
- the flanges 2 are preferably 85-130% as thick as the ports 3.
- each flange 2 and the surrounding portion 5 of each bolthole 4 after casting and before machining are thicker by a predetermined machining margin 7
- the thickness t 1 of the flange 2 and the thickness t 3 of the surrounding portion 5 of the bolthole 4 are expressed as thickness from the surface 21 of the flange 2 after machining in the present invention, as shown in Fig. 1(b) .
- the thickness of the surrounding portions 5 of the boltholes 4 is 110-300% of that of the flanges 2, the flanges 2 are not easily thermally deformed even if the exhaust manifold is exposed to a high-temperature exhaust gas. Thus, an exhaust gas is prevented from flowing out through gaps between the exhaust ports of a cylinder head and the flanges 2 of the exhaust manifold.
- the surrounding portions 5 of the boltholes 4 are less than 110% as thick as the flanges 2, the flanges 2 are easily thermally deformed by a high-temperature exhaust gas. When it exceeds 300%, voids are likely generated in the flanges 2 during casting.
- the thickness t 4 of the ridge 11 is preferably 70-140% as thick as the port 3.
- t 4 is less than 70% of the thickness of the ports 3, the thermal deformation of the ports 3 cannot be sufficiently prevented.
- t 4 exceeds 140%, the exhaust manifold cannot be made light in weight.
- the thickness t 4 of the ridges 11 is preferably 80-120% as thick as the ports 3.
- the ridges 11 may extend from the convergence portion 8 to the branching portions of the ports 3 as shown in Figs. 4(b) and 4(c) .
- the heat-resistant-cast-steel-made exhaust manifold of the present invention is preferably made of, for instance, heat-resistant, austenitic cast steel comprising by mass 0.2-1.0% of C, 0.05-0.6% of (C-Nb/8), 2% or less of Si, 2% or less of Mn, 8-20% of Ni, 15-30% of Cr, 0.5-6.0% of Nb, 1-6% of W, 0.01-0.3% of N, and 0.01-0.5% of S, the balance being Fe and inevitable impurities.
- Exhaust manifolds shown in Fig. 1 were formed by heat-resistant, austenitic cast steel having a composition comprising by mass 0.45% of C, 1.2% of Si, 1.0% of Mn, 0.015% of P, 0.015% of S, 10% of Ni, 20% of Cr, 1.5% of Nb, and 3.0% of W (Examples 1-8 and Comparative Examples 1-3).
- the thickness t 1 of a flange 2, the thickness t 2 of a port 3, and the thickness t 3 of an surrounding portion 5 of a bolthole 4 are shown in Table 1.
- Exhaust manifolds shown in Fig. 4(a) were also formed by the same heat-resistant, austenitic cast steel as above (Examples 9-14).
- the thickness t 4 of ridges 11 is shown in Table 1 together with t 1 to t 3 .
- the exhaust manifolds of the present invention having flanges 80-150% as thick as ports were produced free from voids without providing risers, and suffered only small thermal deformation during use.
- Examples 1, 2 and 4-8 in which the bolthole-surrounding portions were 110-300% as thick as the flanges, suffered small thermal deformation.
- the exhaust manifolds of Examples 9-14 each having ridges extending along the ports from the convergence portion suffered smaller thermal deformation.
- the exhaust manifold of the present invention made of heat-resistant cast steel and having the above structure, which has small weight and excellent thermal deformation resistance, can be efficiently produced with a small number of steps.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006040499 | 2006-02-17 | ||
PCT/JP2007/052997 WO2007094500A1 (fr) | 2006-02-17 | 2007-02-19 | Tubulure d'echappement en acier coule resistant a la chaleur |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1985820A1 true EP1985820A1 (fr) | 2008-10-29 |
EP1985820A4 EP1985820A4 (fr) | 2010-01-06 |
EP1985820B1 EP1985820B1 (fr) | 2012-09-05 |
Family
ID=38371671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07714523A Expired - Fee Related EP1985820B1 (fr) | 2006-02-17 | 2007-02-19 | Tubulure d'echappement en acier coule resistant a la chaleur |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090064670A1 (fr) |
EP (1) | EP1985820B1 (fr) |
JP (1) | JPWO2007094500A1 (fr) |
KR (1) | KR20080096666A (fr) |
CN (1) | CN101384803A (fr) |
WO (1) | WO2007094500A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009011748B4 (de) * | 2009-03-09 | 2013-05-23 | Tenneco Gmbh | Abgasanlage für eine Verbrennungskraftmaschine mit nebeneinander angeordneten Flanschplatten |
DE102014103820A1 (de) * | 2014-03-20 | 2015-09-24 | Benteler Automobiltechnik Gmbh | Abgaskrümmer für eine Abgasanlage eines Verbrennungsmotors |
US9488081B2 (en) | 2014-12-17 | 2016-11-08 | Caterpillar Inc. | Exhaust manifold assembly and system |
EP3730756B1 (fr) * | 2019-04-26 | 2021-09-22 | Kubota Corporation | Système d'échappement pour un moteur à combustion interne |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4182122A (en) * | 1978-02-15 | 1980-01-08 | Caterpillar Tractor Co. | Insulated exhaust manifold |
US5566548A (en) * | 1994-11-09 | 1996-10-22 | Caterpillar Inc. | Exhaust manifold joint |
EP0955453A2 (fr) * | 1998-05-05 | 1999-11-10 | Friedrich Boysen GmbH & Co. KG | Collecteur d'échappement |
US6256990B1 (en) * | 1998-12-28 | 2001-07-10 | Hitachi Metals, Ltd. | Exhaust manifold integrally cast with turbine housing for turbocharger |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60137112U (ja) * | 1984-02-22 | 1985-09-11 | トヨタ自動車株式会社 | エキゾ−ストマニホ−ルド |
JPS63132825U (fr) * | 1987-02-23 | 1988-08-30 | ||
JP2605242B2 (ja) * | 1991-04-17 | 1997-04-30 | 豊田合成株式会社 | ステアリングホイール芯金の製造方法 |
JPH0658120U (ja) * | 1991-07-16 | 1994-08-12 | 本田技研工業株式会社 | 多気筒エンジンの排気マニホールド |
JPH1026018A (ja) | 1996-07-10 | 1998-01-27 | Nissan Motor Co Ltd | 内燃機関の排気マニホルド |
JPH1162741A (ja) * | 1997-08-08 | 1999-03-05 | Suzuki Motor Corp | エンジンの吸気マニホルド |
JP4269244B2 (ja) * | 1999-04-14 | 2009-05-27 | 日立金属株式会社 | エキゾーストマニホールド用鋳物 |
JP2001207841A (ja) * | 2000-01-24 | 2001-08-03 | Mitsubishi Motors Corp | 多気筒エンジン用排気マニホールド |
JP2002309935A (ja) * | 2001-02-08 | 2002-10-23 | Hitachi Metals Ltd | 耐熱鋳鋼製排気系部品 |
JP2003063224A (ja) * | 2001-08-29 | 2003-03-05 | Hitachi Metals Ltd | 自動車用サスペンションアーム |
JP4087320B2 (ja) * | 2003-09-12 | 2008-05-21 | 本田技研工業株式会社 | 内燃機関用シリンダブロック |
-
2007
- 2007-02-19 WO PCT/JP2007/052997 patent/WO2007094500A1/fr active Application Filing
- 2007-02-19 US US12/279,482 patent/US20090064670A1/en not_active Abandoned
- 2007-02-19 KR KR1020087019988A patent/KR20080096666A/ko not_active Application Discontinuation
- 2007-02-19 EP EP07714523A patent/EP1985820B1/fr not_active Expired - Fee Related
- 2007-02-19 JP JP2008500590A patent/JPWO2007094500A1/ja active Pending
- 2007-02-19 CN CNA2007800056541A patent/CN101384803A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4182122A (en) * | 1978-02-15 | 1980-01-08 | Caterpillar Tractor Co. | Insulated exhaust manifold |
US5566548A (en) * | 1994-11-09 | 1996-10-22 | Caterpillar Inc. | Exhaust manifold joint |
EP0955453A2 (fr) * | 1998-05-05 | 1999-11-10 | Friedrich Boysen GmbH & Co. KG | Collecteur d'échappement |
US6256990B1 (en) * | 1998-12-28 | 2001-07-10 | Hitachi Metals, Ltd. | Exhaust manifold integrally cast with turbine housing for turbocharger |
Non-Patent Citations (1)
Title |
---|
See also references of WO2007094500A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR20080096666A (ko) | 2008-10-31 |
CN101384803A (zh) | 2009-03-11 |
JPWO2007094500A1 (ja) | 2009-07-09 |
US20090064670A1 (en) | 2009-03-12 |
EP1985820A4 (fr) | 2010-01-06 |
EP1985820B1 (fr) | 2012-09-05 |
WO2007094500A1 (fr) | 2007-08-23 |
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