EP0223158B1 - Perfected internal combustion engine block - Google Patents

Perfected internal combustion engine block Download PDF

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Publication number
EP0223158B1
EP0223158B1 EP19860115375 EP86115375A EP0223158B1 EP 0223158 B1 EP0223158 B1 EP 0223158B1 EP 19860115375 EP19860115375 EP 19860115375 EP 86115375 A EP86115375 A EP 86115375A EP 0223158 B1 EP0223158 B1 EP 0223158B1
Authority
EP
European Patent Office
Prior art keywords
engine block
oblique
cavity
internal combustion
fact
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
Application number
EP19860115375
Other languages
German (de)
French (fr)
Other versions
EP0223158A1 (en
Inventor
Luigi Conti
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.)
Fiat Auto SpA
Original Assignee
Fiat Auto SpA
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 Fiat Auto SpA filed Critical Fiat Auto SpA
Publication of EP0223158A1 publication Critical patent/EP0223158A1/en
Application granted granted Critical
Publication of EP0223158B1 publication Critical patent/EP0223158B1/en
Expired legal-status Critical Current

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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
    • F02F7/00—Casings, e.g. crankcases or frames
    • 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

Definitions

  • the present invention relates to a perfected internal combustion engine block. Smooth operation of the said engines is known to depend on maintaining the engine components subject to most thermal stress at a temperature compatible with the functions performed by such components. This therefore means cooling the engine blocks, in particular, the most critical points on the same, such as the portions between two adjacent cylinders, which, being of very limited thickness, do not allow for sufficient coolant circulation.
  • a cavity is formed about each cylinder and communicating externally via vertical holes. Inside the portions extending between two adjacent cylinders, provision is made for two such vertical holes, one for each cavity and, therefore, one for each cylinder.
  • the cavities of two adjacent cylinders communicate via a third cavity formed by casting ; on other types, the vertical holes of two adjacent cavities communicate via an oblique hole (see US 4,369,739, Figures 2 and 4), or by removing material off the cylinder head.
  • an internal combustion engine block having a coolant circulating circuit of the type comprising a cavity surrounding the cylinders and communicating external through a first and a second vertical passages and a first oblique hole, which are situated in each portion of the said block extending between two adjacent cylinders, characterised by the fact that it comprises a second oblique hole situated in said portion extending between said two adjacent cylinders, to connect external the said cavity ; said second oblique hole intersecting the said first oblique hole.
  • Fig. 1 shows a partial section of an internal combustion engine block
  • Fig. 2 shows an enlarged section of a detail on the Fig. 1 block.
  • Number 1 in Fig. 1 indicates a perfected block for known types of internal combustion engines.
  • the said holes 3 communicate via two oblique, centrally-intersecting holes 4, the said intersection defining, on block 1, a triangular-section portion 5 having its tip situated at the said point of intersection and the other two tips located at the top ends of two adjacent said holes 3.
  • Cavity 2 and holes 3 and 4 define a circuit in which to circulate coolant, preferably water containing antifreeze and passivators for preventing corrosion.
  • the said circuit forms part of a known type of cooling system which, depending on the type of application, may be a consumption or total/partial feedback type.
  • the cavity 2 is fed, e. g. by means of a pump, with coolant which flows out through holes 3, part of the said coolant flowing into adjacent hole 3 via communicating hole 4.
  • the mean speeds (V1 and V2 in Fig. 2) of the coolant flowing in holes 4 combine to give a resultant (V3) ' directly incident with the tip of portion 5, and the resulting swirl of which provides for improved heat exchange between the coolant and the said portion 5.
  • improved cooling provides for greater reliability of the components subject to overheating in the area in question, i. e. cylinders, pistons, piston rings, etc., thus reducing wear on the said components and, consequently, maintenance cost of the same.
  • Improved engine performance may also be obtained without subjecting the block to critical operating temperatures.
  • the centre distance between the cylinders may also be reduced at the design stage, for so reducing the length of the engine.
  • block 1 provides for greater cooling efficiency, as compared with known types of blocks, as well as for lower manufacturing cost, as compared with blocks having a cast connecting cavity between two annular cavities ; which solution, despite the improvement it affords in terms of cooling, is complex in design, expensive to manufacture and reduces the rigidity of the block.

Description

  • The present invention relates to a perfected internal combustion engine block. Smooth operation of the said engines is known to depend on maintaining the engine components subject to most thermal stress at a temperature compatible with the functions performed by such components. This therefore means cooling the engine blocks, in particular, the most critical points on the same, such as the portions between two adjacent cylinders, which, being of very limited thickness, do not allow for sufficient coolant circulation.
  • At present, a cavity is formed about each cylinder and communicating externally via vertical holes. Inside the portions extending between two adjacent cylinders, provision is made for two such vertical holes, one for each cavity and, therefore, one for each cylinder. On certain types of engine blocks, the cavities of two adjacent cylinders communicate via a third cavity formed by casting ; on other types, the vertical holes of two adjacent cavities communicate via an oblique hole (see US 4,369,739, Figures 2 and 4), or by removing material off the cylinder head.
  • The aim of the present invention is to provide a perfected internal combustion engine block enabling improved cooling as compared with known blocks of the aforementioned types. With this aim in view, according to the present invention, there is provided an internal combustion engine block having a coolant circulating circuit of the type comprising a cavity surrounding the cylinders and communicating external through a first and a second vertical passages and a first oblique hole, which are situated in each portion of the said block extending between two adjacent cylinders, characterised by the fact that it comprises a second oblique hole situated in said portion extending between said two adjacent cylinders, to connect external the said cavity ; said second oblique hole intersecting the said first oblique hole.
  • A preferred embodiment of the present invention will be described by way of example with reference to the accompanying drawings in which : Fig. 1 shows a partial section of an internal combustion engine block ; Fig. 2 shows an enlarged section of a detail on the Fig. 1 block. Number 1 in Fig. 1 indicates a perfected block for known types of internal combustion engines. About each cylinder, there is formed a cavity 2 communicating externally via two vertical holes 3 each formed in the portion of block 1 extending between two adjacent cylinders. According to the present invention, the said holes 3 communicate via two oblique, centrally-intersecting holes 4, the said intersection defining, on block 1, a triangular-section portion 5 having its tip situated at the said point of intersection and the other two tips located at the top ends of two adjacent said holes 3. Cavity 2 and holes 3 and 4 define a circuit in which to circulate coolant, preferably water containing antifreeze and passivators for preventing corrosion. The said circuit forms part of a known type of cooling system which, depending on the type of application, may be a consumption or total/partial feedback type. By means of a duct (not shown), the cavity 2 is fed, e. g. by means of a pump, with coolant which flows out through holes 3, part of the said coolant flowing into adjacent hole 3 via communicating hole 4. At the said point of intersection, the mean speeds (V1 and V2 in Fig. 2) of the coolant flowing in holes 4 combine to give a resultant (V3)' directly incident with the tip of portion 5, and the resulting swirl of which provides for improved heat exchange between the coolant and the said portion 5.
  • The advantages of the engine block according to the present invention will be clear from the foregoing description.
  • In particular, improved cooling provides for greater reliability of the components subject to overheating in the area in question, i. e. cylinders, pistons, piston rings, etc., thus reducing wear on the said components and, consequently, maintenance cost of the same. Improved engine performance may also be obtained without subjecting the block to critical operating temperatures. Furthermore, the centre distance between the cylinders may also be reduced at the design stage, for so reducing the length of the engine. Finally, block 1 provides for greater cooling efficiency, as compared with known types of blocks, as well as for lower manufacturing cost, as compared with blocks having a cast connecting cavity between two annular cavities ; which solution, despite the improvement it affords in terms of cooling, is complex in design, expensive to manufacture and reduces the rigidity of the block.

Claims (4)

1. An internal combustion engine block having a coolant circulating circuit of the type comprising a cavity surrounding the cylinders and communicating external through a first and a second vertical passages and a first oblique hole, which are situated in each portion of the said block extending between two adjacent cylinders, characterised by the fact that it comprises a second oblique hole (4) situated in said portion extending between said two adjacent cylinders, to connect external the said cavity (2) ; said second oblique hole (4) intersecting the said first oblique hole.
2. An engine block as claimed in claim 1, characterised by the fact that the said first and second oblique holes (4) intersect centrally in a point placed between the said first and second vertical passages (3), so as to define a substantially triangular-section zone (5) in the said portion extending between said two adjacent cylinders.
3. An engine block as ciaimed in claim 1 or 2, characterised by the fact that each of the said first and second oblique holes (4) extends from a corresponding bottom end of the said first and second vertical passage (3), in the proximity of a connecting point between the said first and second vertical passages (3) and relevant portions of said cavity (2).
4. An engine block as claimed in claim 3, characterised by the fact that each of the said first and second oblique holes (4) comes out at the top end of the said second and first vertical passages (3) respectively.
EP19860115375 1985-11-22 1986-11-06 Perfected internal combustion engine block Expired EP0223158B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT5407085U 1985-11-22
IT5407085U IT206484Z2 (en) 1985-11-22 1985-11-22 PERFECTED BASE FOR ENDOTHERMAL ENGINES

Publications (2)

Publication Number Publication Date
EP0223158A1 EP0223158A1 (en) 1987-05-27
EP0223158B1 true EP0223158B1 (en) 1990-03-07

Family

ID=11286580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860115375 Expired EP0223158B1 (en) 1985-11-22 1986-11-06 Perfected internal combustion engine block

Country Status (5)

Country Link
EP (1) EP0223158B1 (en)
BR (1) BR8606012A (en)
DE (1) DE3669353D1 (en)
ES (1) ES2013237B3 (en)
IT (1) IT206484Z2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY122487A (en) * 2000-12-21 2006-04-29 Petroliam Nasional Berhad Interbore cooling system
FR2869356B1 (en) * 2004-04-26 2008-07-11 Renault Sas ENGINE COOLING PIPE
JP2012188959A (en) * 2011-03-09 2012-10-04 Toyota Motor Corp Cylinder block
DE102017206716B4 (en) 2017-04-21 2021-05-06 Ford Global Technologies, Llc Cylinder block of an internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2722922A (en) * 1954-11-10 1955-11-08 Richard H Sheppard Prevention of cracks in cylinder heads
DE1576713B2 (en) * 1967-12-13 1972-04-13 Daimler Benz Ag Cylinder block for internal combustion engines, in particular for motor vehicles
US4147140A (en) * 1976-06-22 1979-04-03 National Research Development Corporation Cylinder head cooling arrangement for internal combustion engines
US4369739A (en) * 1979-05-07 1983-01-25 Nissan Motor Company, Limited Structure of a cylinder assembly for an internal combustion engine

Also Published As

Publication number Publication date
IT206484Z2 (en) 1987-08-10
ES2013237B3 (en) 1990-05-01
DE3669353D1 (en) 1990-04-12
IT8554070V0 (en) 1985-11-22
BR8606012A (en) 1987-09-15
EP0223158A1 (en) 1987-05-27

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