EP3163060A1 - Zylinderblock und motorkörper - Google Patents

Zylinderblock und motorkörper Download PDF

Info

Publication number
EP3163060A1
EP3163060A1 EP16196310.3A EP16196310A EP3163060A1 EP 3163060 A1 EP3163060 A1 EP 3163060A1 EP 16196310 A EP16196310 A EP 16196310A EP 3163060 A1 EP3163060 A1 EP 3163060A1
Authority
EP
European Patent Office
Prior art keywords
cylinder block
water jacket
reinforcing member
wall
bore
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
Application number
EP16196310.3A
Other languages
English (en)
French (fr)
Other versions
EP3163060B1 (de
Inventor
Yoshihisa Hirosawa
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.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
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 Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP3163060A1 publication Critical patent/EP3163060A1/de
Application granted granted Critical
Publication of EP3163060B1 publication Critical patent/EP3163060B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F1/14—Cylinders with means for directing, guiding or distributing liquid stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/021—Cooling cylinders
    • 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 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F2001/104—Cylinders; Cylinder heads  having cooling means for liquid cooling using an open deck, i.e. the water jacket is open at the block top face

Definitions

  • the present invention relates to an open-deck cylinder block having therein a water jacket having an opening at the top surface of the cylinder block and to an engine body having such a cylinder block.
  • An open-deck cylinder block is known in the art which has therein a water jacket that is formed between a cylindrical bore wall and an outer wall of the cylinder block and is opened at the top surface of cylinder block.
  • the use of such an open-deck cylinder block can reduce the weight and improve the cooling performance of the engine because of the presence of the water jacket.
  • the open-deck type cylinder block is advantageous in terms of its castability.
  • Japanese Patent Application Publication No. H03-253752 discloses an open-deck cylinder block that prevents its deformation by disposing a reinforcing member at a position in the cylinder block adjacent to the top end of a water jacket.
  • the die for the cylinder block has a draft so that the cast cylinder block is removed easily from the die. Therefore, the width dimension of the water jacket tends to have variation.
  • the reinforcing member may not be inserted into the water jacket if the width of the water jacket is smaller than design value and the reinforcing member may fall into the water jacket if the water jacket width is larger than the design value. To avoid such a problem, the tolerance of dimensions of the water jacket may be set smaller, which inevitably increases the cost of controlling the dimension of the water jacket.
  • the present invention which has been made in light of the above problems is directed to providing an open-deck cylinder block having a reinforcing member mounted securely in the water jacket while relaxing the dimensional tolerance of the water jacket.
  • a cylinder block including a bore wall having at least one cylinder bore, an outer wall located outside an outer periphery of the bore wall, and a water jacket defined between the outer periphery of the bore wall and an inner periphery of the outer wall.
  • the cylinder block is an open-deck cylinder block in which a top end of the water jacket is opened.
  • the outer periphery of the bore wall and the inner periphery of the outer wall have respective top edges at the top end of the water jacket.
  • At least one of the outer periphery of the bore wall and the inner periphery of the outer wall has at least one recess at the corresponding top edge.
  • the cylinder block includes at least one reinforcing member that is fitted in the at least one recess and covers part of the water jacket that extends from the at least one recess.
  • the following will describe a cylinder block and an engine body having the cylinder block according to a first embodiment of the present invention with reference to FIGS. 1 and 2 .
  • the cylinder block according to the present invention may be used in a gasoline engine and a diesel engine, but an ignition plug of a gasoline engine or a fuel injection nozzle of a diesel engine is not shown in FIG. 2 .
  • a water jacket 14 is defined in the cylinder block 10 between the outer periphery of the bore wall 12 and an inner periphery of an outer wall 13 of the cylinder block 10 located radially outward of the bore wall 12 and has a groove shape.
  • the water jacket 14 has a shape that combines a plurality of continuous connected arcs surrounding circumferentially the cylinder bores 11. The cooling water flowing in the water jacket 14 cools the engine body 1.
  • the reinforcing members 15 are provided in the water jacket 14 on the thrust side of the respective cylinder bores 11 for suppressing the deformation on the thrust side of the cylinder block 10.
  • the reinforcing member 15 is disposed at a position in the water jacket 14 where an imaginary plane B passing through the axis A of the cylinder bore 11 and extending perpendicularly to the imaginary plane C and the water jacket 14 intersect each other.
  • No reinforcing member such as 15 is disposed at the position in the water jacket 14 on the side of the cylinder bore 11 opposite to the thrust side.
  • Such side of the cylinder bore 11 will hereinafter be referred to as anti-thrust side.
  • the reinforcing member 15 is formed in a rectangular parallelepiped shape and made of an aluminum alloy or the same material as the cylinder block 10. If the reinforcing member 15 and the cylinder block 10 are made of different materials, strain may occur due to the difference of the linear expansion coefficient of the two materials and a gap may be formed, and there may be a fear of corrosion caused by corrosion potential. However, using the same material for the cylinder block 10 and the reinforcing member 15 may prevent these problems.
  • the reinforcing member 15 fitted in the recesses 12a, 13a covers part of the water jacket 14 between the paired recesses 12a, 13a.
  • the top surface of the reinforcing member 15 is substantially flush with the top surfaces of the bore wall 12 and the outer wall 13 of the cylinder block 10.
  • the reinforcing member 15 is fitted in the paired recesses 12a, 13 with no clearance therebetween.
  • the engine body 1 has the intake port 21 on the thrust side of the cylinder bore 11 and the exhaust port 22 on the anti-thrust side, as shown in FIG. 2 . That is, the reinforcing member 15 is disposed only on the intake side of the cylinder bore 11.
  • the first embodiment has the following advantageous effects.
  • the reinforcing member 15 in which the reinforcing member 15 is fitted in the recesses 12a, 13a, as long as the recesses 12a, 13a are formed appropriately facing each other across the water jacket 14, the reinforcing member 15 may be prevented from being too tight to be inserted into the recesses 12a, 13a or from falling off in the water jacket 14 even if there is variation of width dimension of the water jacket 14. That is, the cylinder block 10 according to the present embodiment allows the reinforcing member 15 to be mounted securely across the water jacket 14 while relaxing the tolerance of the dimension of the water jacket 14.
  • the recess such as 12a, 13a may be formed in at least either one of the outer periphery of the bore wall 12 and the inner periphery of the outer wall 13.
  • the reinforcing member 15 may be held securely across the water jacket 14 at the recesses 12a, 13a of the cylinder block 10.
  • the intake port 21 is formed on the thrust side of the cylinder bore 11 and the exhaust port 22 is formed on the anti-thrust side.
  • the engine body 1 tends to become higher temperature in the anti-thrust side where the exhaust port 22 is formed due to the influence of high temperature exhaust gas.
  • the reinforcing member 15 provided on the thrust side opposite from the anti-thrust side and, therefore, the temperature rise on the exhaust side of the engine body 1 can be reduced effectively.
  • the reinforcing member 15 is provided not only on the thrust side of the cylinder bore 11, but also on the anti-thrust side.
  • the provision of the reinforcing member 15 on both the thrust and anti-thrust sides can improve the rigidity of the cylinder block 10 in both thrust and anti-thrust directions and suppress the deformation of the cylinder block 10 more effectively.
  • FIGS. 4A and 4B The following will describe a third embodiment according to the present invention with reference to FIGS. 4A and 4B .
  • the same reference numerals will be used to denote those components or elements which correspond to the counterparts of the first and the second embodiments and the description and the advantageous effects thereof will not be reiterated.
  • the reinforcing members 15 are disposed in the same manner as in the second embodiment, but differs from the second embodiment in that a cooling fin 16 is mounted to the reinforcing member 15.
  • the cooling fin 16 is made of a material such as copper that has a higher thermal conductivity than reinforcing member 15.
  • the cooling fin 16 may be made of a bent copper plate and fixed to the reinforcing member 15 by a bolt. It is noted that according to the present embodiment, the material, shape, and method for mounting are changeable.
  • the reinforcing member 15 is disposed at a position where the imaginary plane B passing through the axis A of the cylinder bore 11 and extending perpendicularly to the imaginary plane C and the water jacket 14 intersect each other. According to the present invention, however, the position of the reinforcing member 15 is not limited to the above.
  • the reinforcing member 15 should be disposed within the range of an angle ⁇ of about 45 degrees about the center A and as measured from the imaginary plane B (shown FIG. 1 ), and preferably within an angle ⁇ of about 30 degrees. As disclosed in the foregoing embodiments, the reinforcing member 15 should most preferably be disposed at a position corresponding to zero degree, or disposed on the imaginary plane B.
  • the reinforcing member 15 is disposed only on the thrust side of the cylinder bore 11, and the intake port 21 and the exhaust port 22 are provided on the thrust side and the anti-thrust side, respectively.
  • the exhaust port 22 and the intake port 21 may be provided on the thrust side and the anti-thrust side, respectively.

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)
EP16196310.3A 2015-11-02 2016-10-28 Zylinderblock und Motorkörper Not-in-force EP3163060B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015215474A JP6354732B2 (ja) 2015-11-02 2015-11-02 シリンダブロックおよびエンジン本体

Publications (2)

Publication Number Publication Date
EP3163060A1 true EP3163060A1 (de) 2017-05-03
EP3163060B1 EP3163060B1 (de) 2018-12-19

Family

ID=57218745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16196310.3A Not-in-force EP3163060B1 (de) 2015-11-02 2016-10-28 Zylinderblock und Motorkörper

Country Status (2)

Country Link
EP (1) EP3163060B1 (de)
JP (1) JP6354732B2 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03253752A (ja) 1990-03-02 1991-11-12 Nissan Motor Co Ltd デッキ補強片溶接型アルミシリンダブロック
EP0869270A2 (de) * 1997-04-05 1998-10-07 VAW mandl & berger GmbH Zylinderkurbelgehäuse mit geschweissten Brücken
EP1541830A1 (de) * 2002-08-30 2005-06-15 Taiho Kogyo Co., Ltd. Motor kühlvorrichtung
JP2007002822A (ja) * 2005-06-27 2007-01-11 Toyota Motor Corp 分割型シリンダブロック
JP2007315196A (ja) * 2006-05-23 2007-12-06 Mitsubishi Motors Corp ウォータジャケットスペーサ

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5382604U (de) * 1976-12-13 1978-07-08
JPS6018245U (ja) * 1983-07-16 1985-02-07 本田技研工業株式会社 エンジンのシリンダヘツドガスケツト
JPS62165442U (de) * 1986-04-07 1987-10-21
DE19757233A1 (de) * 1997-12-22 1999-06-24 Audi Ag Zylindergehäuse für Hubkolben-Maschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03253752A (ja) 1990-03-02 1991-11-12 Nissan Motor Co Ltd デッキ補強片溶接型アルミシリンダブロック
EP0869270A2 (de) * 1997-04-05 1998-10-07 VAW mandl & berger GmbH Zylinderkurbelgehäuse mit geschweissten Brücken
EP1541830A1 (de) * 2002-08-30 2005-06-15 Taiho Kogyo Co., Ltd. Motor kühlvorrichtung
JP2007002822A (ja) * 2005-06-27 2007-01-11 Toyota Motor Corp 分割型シリンダブロック
JP2007315196A (ja) * 2006-05-23 2007-12-06 Mitsubishi Motors Corp ウォータジャケットスペーサ

Also Published As

Publication number Publication date
EP3163060B1 (de) 2018-12-19
JP6354732B2 (ja) 2018-07-11
JP2017089386A (ja) 2017-05-25

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