WO2016158043A1 - ウォータージャケットスペーサー - Google Patents
ウォータージャケットスペーサー Download PDFInfo
- Publication number
- WO2016158043A1 WO2016158043A1 PCT/JP2016/054332 JP2016054332W WO2016158043A1 WO 2016158043 A1 WO2016158043 A1 WO 2016158043A1 JP 2016054332 W JP2016054332 W JP 2016054332W WO 2016158043 A1 WO2016158043 A1 WO 2016158043A1
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- WO
- WIPO (PCT)
- Prior art keywords
- water jacket
- spacer
- seal lip
- bore
- wall surface
- Prior art date
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Classifications
-
- 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
- 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
- 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
-
- 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
Definitions
- the present invention relates to a water jacket spacer, and more particularly, it is possible to suppress the entry of cooling water with the bore side inner wall surface of a water jacket provided in a cylinder block such as a water cooling engine for automobile with a simple structure and
- the present invention relates to a water jacket spacer that can be easily installed inside.
- a groove called a water jacket for cooling water is provided around the bore wall of a cylinder block of a water cooling engine for automobiles, etc. Cooling of the bore wall is carried out by circulating the cooling water in the water jacket. .
- the axial wall temperature in the bore axial direction tends to be higher on the combustion chamber side at the top of the bore and lower on the crankshaft side at the bottom of the bore. It is known that, due to this temperature gradient, the bore internal diameter becomes uneven in the axial direction, thereby increasing the friction of the piston and affecting the fuel consumption performance of the engine.
- Patent Documents 1 and 2 Patent Documents 1 and 2.
- the conventional water jacket spacer is composed of a single resin or a combination of resin and foamed water absorbent rubber, but in any case, it is inevitable that a gap is generated between the water jacket and the bore side inner wall surface of the water jacket.
- the thickness is set smaller than the width of the water jacket in consideration of the insertability into the water jacket, so that a gap necessarily occurs with the inner wall surface.
- the combination of resin and foamed water-absorbent rubber since the permanent set (permanent strain) is large, when the rubber swells at the time of water absorption and high temperature, settle occurs, and the temperature drops and the volume decreases in that state. It is thought that a gap is generated as a result.
- Patent Document 1 also describes inserting a plate spring or a wedge as a separate member into the water jacket to press the water jacket spacer against the bore side inner wall surface of the water jacket.
- a plate spring or a wedge as a separate member into the water jacket to press the water jacket spacer against the bore side inner wall surface of the water jacket.
- the present invention can provide a water jacket spacer that can suppress the cooling water from entering between the inner wall surface on the bore side of the water jacket and the water jacket with a simple structure, and can be easily installed in the water jacket. It will be an issue.
- a water jacket spacer inserted in a water jacket provided in a cylinder block around a bore and regulating the flow of cooling water flowing into the water jacket from a cooling water inlet opening in the inner wall surface of the water jacket,
- the upper end portion of the spacer main body is provided with a first seal lip portion in contact with the bore-side inner wall surface of the water jacket to seal a gap formed between the bore-side inner wall surface and the spacer main body.
- Water jacket spacer featuring 2.
- the upper end portion of the spacer main body is elastically deformed in contact with the anti-bore side inner wall surface of the water jacket, and the reaction force at that time brings the first seal lip portion into close contact with the bore side inner wall surface of the water jacket.
- the second seal lip portion is formed in a length in contact with a closing member closing the upper portion of the water jacket when inserted into the water jacket, and the height of the spacer main body between the second sealing lip portion and the closing member. 3.
- the water jacket spacer as described in 2 above, which also serves to position the direction and to prevent it from coming off. 4.
- the water according to 1 above further comprising: a closing member closing an upper portion of the water jacket, and a retaining member disposed between the spacer main body and positioning and stopping the spacer main body in the height direction.
- Jacket spacer 5.
- the water jacket spacer according to the above 4 wherein a projection for reducing the insertion resistance into the water jacket is provided on the surface of the retaining member on the side of the first seal lip.
- the water jacket spacer according to the above 5 wherein the projection is formed in a tapered shape in which the height of projection becomes lower toward the lower part of the water jacket.
- a projection for reducing the insertion resistance into the water jacket is provided on the surface of the first seal lip portion on the side of the retaining member.
- the bead portion or the third seal lip portion in close contact with the bore side inner wall surface and / or the anti-bore side inner wall surface of the water jacket is provided at the lower end portion of the spacer main body.
- the second seal lip portion is a solid rubber.
- a water jacket spacer that can suppress cooling water from entering the water jacket with the bore side inner wall surface with a simple structure and can also be easily installed in the water jacket. it can.
- a perspective view showing an example of the retaining member A perspective view showing another example of the retaining member, (b) is a partial cross-sectional view of the retaining member shown in (a) for explaining the protrusion Sectional view of a cylinder block into which a water jacket spacer having a retaining member shown in FIG.
- FIG. 5 A plan view of a cylinder block of a water-cooled engine to which a water jacket spacer according to a second embodiment of the present invention is applied Sectional view along line (viii)-(viii) in FIG. 7 Cross section of a water jacket spacer according to a second embodiment in a state of being removed from the water jacket
- Cross section of a water jacket spacer showing an example in which a bead portion is provided at the lower end portion of the spacer main body
- A) and (b) are sectional views of a water jacket spacer showing an example in which a third seal lip portion is provided at the lower end portion of the spacer main body
- FIG. 1 is a plan view of a cylinder block of a water-cooled engine to which a water jacket spacer according to a first embodiment of the present invention is applied, and the cylinder block is indicated by an alternate long and short dash line.
- FIG. 2 is a cross-sectional view taken along the line (ii)-(ii) in FIG. 1
- FIG. 3 is a cross-sectional view of a water jacket spacer according to the first embodiment in a state of being removed from the water jacket.
- the cylinder block 100 is provided with a plurality of bores 101 and an open deck type grooved water jacket 102 surrounding the periphery thereof.
- a bore wall 103 is between the bore 101 and the water jacket 102.
- a piston 104 is disposed so as to be capable of reciprocating in the axial direction (vertical direction in FIG. 2).
- Cooling water is supplied to the inside of the water jacket 102 through the cooling water supply passage 105 formed in the cylinder block 100, and the internal cooling water is discharged through the cooling water discharge passage 106.
- the cooling water inlet 105 a and the cooling water outlet 106 a are located at predetermined heights on the non-bore side inner wall surface 102 b of the water jacket 102 and are open.
- a cylinder head 200 is provided at the top of the cylinder block 100.
- the cylinder head 200 is fixed to a cylinder block 100 via a cylinder head gasket 300 by a bolt (not shown).
- a bolt (not shown).
- the cylinder head 200 and the cylinder head gasket 300 are closing members that close the top of the water jacket 102.
- the cylinder head gasket 300 may not necessarily close the top of the water jacket 102.
- the water jacket spacer 1 is inserted in the water jacket 102.
- a spacer main body 10 is configured by a synthetic resin core material 11 and an elastic body 12 coated on the surface of the synthetic resin core material 11.
- the synthetic resin core material 11 is formed to be substantially similar to the planar shape of the bore wall 103. That is, the synthetic resin core material 11 is formed to extend along the entire circumference of the water jacket 102 in an annular shape in which a plurality of cylindrical surfaces are connected in a wave shape so as to surround the plurality of bores 101.
- the resin material of the synthetic resin core material 11 include polyamide-based resins.
- the elastic body 12 is provided over the entire circumference of the synthetic resin core material 11.
- a rubber is generally used as the elastic body 12, a non-foamed rubber containing no water-absorbing polymer material, that is, a solid rubber is preferable.
- Solid rubber hardly swells due to water absorption as in the foamed water-absorbent rubber, so it is difficult for heat to be set by heating in a swollen state, and it is possible to suppress a decrease in physical properties after endurance.
- the elastic body 12 made of solid rubber also improves the adhesion with the bore side inner wall surface 102 a of the water jacket 102 and the anti-bore side inner wall surface 102 b. Further, since the initial insertion resistance of the water jacket spacer 1 can be kept very small, the insertion work into the water jacket 102 becomes easy.
- solid rubber for example, EPDM (ethylene propylene rubber), HNBR (hydrogenated nitrile rubber), FKM (fluorinated rubber) and the like can be preferably used.
- EPDM ethylene propylene rubber
- HNBR hydrogenated nitrile rubber
- FKM fluorinated rubber
- Such solid rubber can be integrated on the surface of the synthetic resin core material 11 by baking.
- a hole is made in the synthetic resin core material 11 and a solid rubber is coated so as to pass through the hole so that the synthetic resin core material 11 is mechanically fixed without adhesion. It is also good.
- the height h11 (see FIG. 3) from the upper end to the lower end of the spacer main body 10 is appropriately smaller than the depth of the water jacket 102. Specifically, when the water jacket spacer 1 is inserted into the lower portion of the water jacket 102, the spacer body 10 is positioned at the upper end of the spacer body 10 at the cooling water inlet 105a and the cooling water outlet 106a (in FIG. 2). Only the cooling water inlet 105a is shown.
- the spacer body 10 is provided with a first seal lip portion 13 at the upper end portion of the inner side surface (side surface on the side of the bore 101) 10a.
- the first seal lip portion 13 is integrally formed with the elastic body 12 by the same elastic body as the elastic body 12, preferably by the same solid rubber as the elastic body 12.
- the first seal lip portion 13 is formed to extend obliquely upward from the upper end of the inner side surface 10 a of the spacer main body 10 inside the spacer main body 10.
- the first seal lip portion 13 is formed over the entire circumference of the spacer main body 10.
- the width w1 from the tip of the first seal lip portion 13 to the outer side surface (side surface on the opposite bore side) 10b of the spacer main body 10 is larger than the groove width of the water jacket 102.
- the height h12 from the upper end of the first seal lip portion 13 to the lower end of the spacer main body 10 is sufficiently higher than the height h11 of the spacer main body 10. As a result, the first seal lip portion 13 forms a sufficiently large widthwise interference with the water jacket 102.
- the dimension of the height h12 is smaller than the dimension of the depth of the water jacket 102.
- the height h12 is about half the depth of the water jacket 102.
- the first seal lip portion 13 closely contacts the bore-side inner wall surface 102a of the water jacket 102, thereby making it possible to prevent the cooling water from coming into contact with the entire circumference of the bore-side inner wall surface 102a. Form. Therefore, the height h12 is appropriately set in consideration of the cooling efficiency in the axial direction of the bore wall 103.
- the water jacket spacer 1 is inserted into the lower portion of the water jacket 102 so that the first seal lip portion 13 faces the spacer body 10. Since the width w1 of the water jacket spacer 1 is larger than the groove width of the water jacket 102, the first seal lip 13 elastically deforms along the bore-side inner wall surface 102a of the water jacket 102, and as shown in FIG. Close closely along the entire circumference of the side inner wall surface 102a.
- the upper end side of the spacer main body 10 is urged to be pressed against the bore side by the reaction force when the first seal lip portion 13 is elastically deformed, and the upper end side of the outer side surface 10 b of the spacer main body 10 is a water jacket It abuts on the anti-bore side inner wall surface 102 b 102.
- the water jacket spacer 1 is positioned in the water jacket 102.
- a gap S is formed between the bore-side inner wall surface 102 a below the first seal lip portion 13 and the spacer main body 10.
- the first seal lip portion 13 is in close contact with the bore-side inner wall surface 102 a to seal the gap S, and the cooling water inlet 105 a is opened above the spacer main body 10. The cooling water flowing into the water jacket 102 is unlikely to enter the gap S.
- the cooling water on the upper side of the bore, where the temperature is relatively high, cooling can be performed efficiently by the cooling water having a high flow rate, while on the lower side of the bore, where the temperature is relatively low, the cooling water closely
- the first seal lip portion 13 forms a region in which the cooling water is not easily in contact, and further, the inside of the gap S below the first seal lip portion 13 has a heat insulating function of air, thereby suppressing cooling. Further, even if the cooling water enters the gap S, the flow velocity of the cooling water in the gap S is extremely reduced, so that the cooling is suppressed compared to the upper side of the bore.
- the water jacket spacer 1 seals the member having a simple structure of the water jacket spacer 1 itself, such as the first seal lip 13, in close contact with the bore side inner wall surface 102a of the water jacket 102, and the bore side
- the entry of cooling water between the inner wall surface 102 a and the spacer main body 10 is extremely suppressed. This makes it possible to equalize the temperature distribution in the axial direction of the bore wall 103 and to reduce the friction of the piston 104, thereby obtaining the original effect of the water jacket spacer.
- the water jacket spacer 1 no separate member is required for pressing the bore-side inner wall surface 102 a of the water jacket 102.
- the mounting operation of the water jacket spacer 1 is extremely simple since it only needs to be inserted into the water jacket 102.
- the outer surface 10 b of the spacer main body 10 is pressed against the non-bore side inner wall surface 102 b of the water jacket 102 by the reaction force when the first seal lip portion 13 is elastically deformed. It can be held between 102a and the anti-bore side inner wall surface 102b to prevent the positioning in the height direction in the water jacket 102 and the upward removal.
- the water jacket spacer 1 preferably further includes a retaining member 14 as shown in FIG.
- the retaining member 14 will be further described with reference to FIG.
- the retaining member 14 is formed to have a shape substantially similar to the planar shape of the bore wall 103. That is, the retaining member 14 has an annular shape in which a plurality of cylindrical surfaces are connected in a wavelike manner so as to surround the plurality of bores 101.
- the retaining member 14 has a shape in which the upper ends of the plurality of curved plates 141 are connected to each other by the connecting portion 142.
- a gap portion 143 having a predetermined width is provided between the adjacent curved plates 141, 141, and cooling water can be circulated between the inside and the outside of the retaining member 14 via the gap portion 143.
- the retaining member 14 is configured by connecting the six curved plates 141 by the connecting portion 142, but the number of the curved plates 141 is not limited at all.
- the retaining member 14 can be formed of the same synthetic resin material as the synthetic resin core material 11.
- the height of the retaining member 14 is, as shown in FIG. 2, a closing member for closing the water jacket 102 from the upper end surface of the spacer main body 10 inserted in the lower part of the water jacket 102 (the cylinder head gasket 300 in FIG. The height of the
- the retaining member 14 When the retaining member 14 is inserted into the water jacket 102, the retaining member 14 is pressed by the cylinder head gasket 300 which is a closing member, whereby the first seal lip 13 and the anti-bore side inner wall surface 102b of the water jacket 102 are formed. Between the two, a downward pressing force is applied to the spacer body 10. This effectively prevents the spacer body 10 from coming upward.
- the first seal lip 13 contacts the bore-side inner wall surface 102a of the water jacket 102 and elastically deforms to increase the insertion resistance, but the retaining member 14 is used By doing this, it is possible to easily insert the spacer main body 10 to the lower part in the water jacket 102. Since the retaining member 14 is an integral body in which the curved plates 141 are connected by the connecting portion 142, the insertion operation into the water jacket 102 is also easy.
- the cooling water can also be circulated between the retaining member 14 and the bore-side inner wall surface 102 a of the water jacket 102. Therefore, the cooling of the bore wall 103 above the first seal lip 13 is not disturbed at all.
- the gap portion 143 may be provided at least a part of the retaining member 14, preferably at least a portion where the cooling water inlet 105 a and the cooling water outlet 106 a are open. Further, instead of or in addition to such a gap portion 143, a through hole through which cooling water can flow may be provided in the curved plate 141.
- FIG. 5 shows a further preferred embodiment of the retaining member 14.
- the retaining member 14 is provided with a projection 144 on the inner surface of each curved plate 141, that is, on the surface on the first seal lip 13 side.
- the protrusion 144 is a protrusion extending linearly along the height direction of each curved plate 141, and has a comb-like shape by arranging a plurality of each curved plate 141 in parallel in the width direction.
- the number of the protrusion parts 144 is not limited at all.
- each protrusion 144 is formed in a triangular shape that is convex toward the inside of the retaining member 14 as shown in FIG. 5B. Therefore, when the retaining member 14 having the projection 144 is inserted into the water jacket 102, the retaining member 14 is in line contact with the side face 13a (see FIG. 3) of the first seal lip 13 on the opposite bore side. The insertion resistance of 14 can be reduced. In addition, since the protrusion 144 exerts a pressing force on the first seal lip portion 13 toward the bore side inner wall surface 102 a of the water jacket 102, the seal function by the first seal lip portion 13 can be made more reliable. it can.
- the protrusion 144 is preferably formed in a tapered shape in which the height of the inward protrusion decreases toward the bottom of the water jacket 102. Thereby, the workability at the time of insertion of the retaining member 14 can be further improved.
- such a projection may be integrally provided on the surface of the first seal lip 13 on the side of the retaining member 14, that is, on the side surface 13a on the anti-bore side, instead of being provided on the retaining member 14. You may In this case, it is preferable that the workability at the time of insertion of the retaining member 14 be improved as described above by forming the protruding height to the outside as increasing toward the lower part of the water jacket 102 as described above. .
- FIG. 7 is a plan view of a cylinder block of a water-cooled engine to which a water jacket spacer according to a second embodiment of the present invention is applied, and the cylinder block is indicated by a dashed dotted line.
- 8 is a cross-sectional view taken along the line (viii)-(viii) in FIG. 7
- FIG. 9 is a cross-sectional view of a water jacket spacer according to the second embodiment in a state of being removed from the water jacket, It is a perspective view shown by the partial section explaining the 2nd seal lip part of the water jacket spacer concerning a 2nd embodiment.
- a spacer main body 20 is configured by a synthetic resin core material 21 and an elastic body 22 coated on the surface of the synthetic resin core material 21.
- the synthetic resin core 21 and the elastic body 22 are the same material as the synthetic resin core 11 and the elastic body 12 in the first embodiment.
- the dimension of the height h21 (see FIG. 9) from the upper end to the lower end of the spacer main body 20 is also appropriately smaller than the depth of the water jacket 102. Specifically, when the water jacket spacer 2 is inserted into the lower portion of the water jacket 102, the spacer body 20 is positioned at the upper end of the spacer body 20 at the cooling water inlet 105a and the cooling water outlet 106a (in FIG. 8). Only the cooling water inlet 105a is shown.
- the spacer body 20 has a first seal lip portion 23 extending obliquely upward inside the spacer body 20 at the upper end portion of the inner side surface 20a thereof.
- the whole of the main body 20 is integrally provided.
- the first seal lip portion 23 is formed shorter than the first seal lip portion 13 in the first embodiment.
- the spacer body 20 is integrally provided with a second seal lip portion 24 extending obliquely upward of the outer side of the spacer body 20 at the upper end portion of the outer side surface 20b.
- the second seal lip portion 24 is formed to have a projection length from the spacer main body 20 sufficiently longer than the first seal lip portion 23.
- the length of the second seal lip portion 24 is formed such that the tip thereof contacts the cylinder head gasket 300 when inserted into the water jacket 102.
- the second seal lip portion 24 extends over the entire circumference of the spacer main body 20, and as shown in FIG. 10, has a notch 24a cut in the height direction at least in part. Accordingly, the cooling water which has flowed into the water jacket 102 from the cooling water inlet 105 a can flow from the outside of the second seal lip 24 toward the inner bore wall 103 via the notch 24 a. As shown in FIG. 7, the notch 24a is preferably provided at least at a portion where the cooling water inlet 105a and the cooling water outlet 106a are open.
- the first seal lip portion 23 and the second seal lip portion 24 are integrally formed of the same elastic body as the elastic body 22 covering the synthetic resin core material 21 as in the first seal lip portion 13 in the first embodiment. Is formed.
- the width w2 from the end of the first seal lip portion 23 to the end of the second seal lip portion 24 is larger than the width of the water jacket 102. Further, the height h22 from the upper end of the second seal lip portion 24 to the lower end of the spacer main body 20 is formed sufficiently higher than the height h21 of the spacer main body 20. Due to these, the first seal lip portion 23 and the second seal lip portion 24 form an interference in the width direction with respect to the water jacket 102.
- the water jacket spacer 2 is inserted into the lower portion of the water jacket 102 such that the first seal lip 23 and the second seal lip 24 face upward with respect to the spacer main body 20. Since the width w2 of the water jacket spacer 2 is larger than the width of the water jacket 102, and the second seal lip portion 24 is formed to have a longer projecting length than the first seal lip portion 23, the second seal lip is first formed.
- the portion 24 elastically deforms along the anti-bore side inner wall surface 102b of the water jacket 102 and closely contacts along the anti-bore side inner wall surface 102b, as shown in FIG.
- the spacer body 20 is biased so that the upper end side of the inner side surface 20a is pressed toward the bore 101 side by the reaction force when the second seal lip portion 24 is elastically deformed.
- the first seal lip portion 23 abuts on the bore side inner wall surface 102 a of the water jacket 102 to be elastically deformed, and closely seals along the bore side inner wall surface 102 a. Therefore, the water jacket spacer 2 achieves a self-sealing function by bringing the first seal lip portion 23 and the second seal lip portion 24 into close contact with the bore side inner wall surface 102 a and the anti-bore side inner wall surface 102 b of the water jacket 102 respectively.
- the gap S is formed between the bore side inner wall surface 102 a and the spacer main body 20.
- the first seal lip portion 23 is in close contact with the bore-side inner wall surface 102 a, and the cooling water inlet 105 a is opened at a position above the spacer main body 20. Even if water flows in, it becomes difficult for cooling water to enter this gap S as in the first embodiment.
- cooling can be efficiently performed by the coolant having a high flow velocity on the upper side of the bore, which has a relatively high temperature.
- the first seal lip 23 is used as a clearance S on the lower side of the bore. Since the cooling water is difficult to enter, the heat insulating function of the air in the gap S works and the flow velocity of the cooling water is extremely reduced as in the first embodiment, and the cooling is suppressed.
- the water jacket spacer 2 is a member having a simple structure which the water jacket spacer 2 itself has, by the first seal lip portion 23 and the second seal lip portion 24 between the water jacket 102 and the bore side inner wall surface 102 a of the water jacket 102. It is possible to suppress the entry of cooling water between them. Also, the mounting operation can be performed extremely simply, and the same effect as that of the first embodiment can be obtained.
- the second seal lip portion 24 is sufficiently longer than the first seal lip portion 23, the second seal lip portion 24 is resilient so as to fall into the bore 101 side in contact with the anti-bore side inner wall surface 102 b.
- the pressing force on the bore side inner wall surface 102 a can be applied to the first seal lip portion 23.
- the first seal lip portion 23 can be brought into close contact with the bore side inner wall surface 102 a strongly, and the sealing function of the first seal lip portion 23 can be further improved.
- the length of the second seal lip portion 24 shown in FIG. 8 is formed in such a length that contacts the cylinder head gasket 300 which is a closing member when inserted into the water jacket 102, but does not slightly contact It may be formed in the length of
- the second seal lip portion 24 When the second seal lip portion 24 is formed to have a length in contact with the cylinder head gasket 300 which is a closing member, the second seal lip portion 24 contacts the cylinder head gasket 300 so that the second seal lip portion 24 is formed. A downward pressure can be exerted on the spacer main body 20 by the elasticity of. Thereby, positioning of the water jacket spacer 2 in the height direction and prevention of upward displacement are performed. That is, the second seal lip portion 24 doubles as positioning and retention.
- This embodiment is a preferable embodiment because there is no need to separately provide a member for positioning and retaining the water jacket spacer 2 and the structure can be simplified.
- the second seal lip portion 24 when the second seal lip portion 24 is formed in a length not slightly in contact with the cylinder head gasket 300 which is the closing member, even if the water jacket spacer 2 floats up in the water jacket 102, the second seal The lip portion 24 abuts on the cylinder head gasket 300 to suppress further lifting.
- the gap between the second seal lip portion 24 and the cylinder head gasket 300 may be appropriately set so that the function as the water jacket spacer 2 is not impaired by the floating of the water jacket spacer 2.
- the spacer body 20 of the water jacket spacer 2 can be provided with a tapered portion 221 which becomes tapered toward the lower end.
- the tapered portion 221 is formed by gradually thinning the elastic members 22 on both surfaces of the synthetic resin core material 21 toward the lower end. As a result, it is possible to improve the mold removal when the water jacket spacer 2 is molded.
- Such a tapered portion can be similarly provided to the water jacket spacer 1 according to the first embodiment.
- FIG. 12 shows an example in which the bead portion 25 is provided at the lower end portion of the spacer main body 20.
- the bead portion 25 is integrally formed over the entire circumference of the water jacket spacer 2 by the same elastic body as the elastic body 22 on both sides of the synthetic resin core material 21.
- the bead portion 25 protrudes from the lower end portion of the spacer main body 20 inward, outward and downward of the spacer main body 20.
- the width of the bead portion 25 is slightly larger than the groove width of the water jacket 102.
- the bead portion 25 closely contacts the bore side inner wall surface 102a and the anti-bore side inner wall surface 102b near the bottom of the water jacket 102.
- the cooling water flowing on the anti-bore side inner wall surface 102b side is less likely to wrap around below the water jacket spacer 2, and the cooling water flows into the bore side inner wall surface 102a via the lower side of the water jacket spacer 2. It can be further suppressed.
- the bead portion may be formed to be in close contact with only one of the bore side inner wall surface 102 a or the anti-bore side inner wall surface 102 b of the water jacket 102. Moreover, such a bead part can be similarly provided in the water jacket spacer 1 which concerns on 1st Embodiment.
- FIGS. 13A and 13B show an example in which the third seal lip portion 26 is provided at the lower end portion of the spacer main body 20.
- the third seal lip portion 26 shown in FIG. 13A is formed to extend obliquely downward from the lower end portion of the spacer main body 20 toward the bore side inner wall surface 102 a of the water jacket 102.
- the third seal lip portion 26 shown in FIG. 13B is formed to extend obliquely downward from the lower end portion of the spacer main body 20 toward the anti-bore side inner wall surface 102b of the water jacket 102.
- These third seal lip portions 26 are integrally formed with the elastic body 22 of the spacer main body 20 over the entire circumference of the water jacket spacer 2.
- the third seal lip 26 closely contacts the bore side inner wall surface 102a or the anti-bore side inner wall surface 102b near the bottom of the water jacket 102. Accordingly, it is possible to further suppress that the cooling water flowing on the anti-bore side inner wall surface 102 b side flows into the bore side inner wall surface 102 a via the lower side of the water jacket spacer 2.
- Such a third seal lip portion can be similarly provided to the water jacket spacer 1 according to the first embodiment.
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
スペーサー本体の上端部に、前記ウォータージャケットのボア側内壁面と接して、該ボア側内壁面と前記スペーサー本体との間に形成される隙間を密封する第1シールリップ部が設けられていることを特徴とするウォータージャケットスペーサー。
2.前記スペーサー本体の上端部に、前記ウォータージャケットの反ボア側内壁面と接して弾性変形し、その際の反力によって前記第1シールリップ部を前記ウォータージャケットのボア側内壁面に密接させる第2シールリップ部が設けられていることを特徴とする前記1記載のウォータージャケットスペーサー。
3.前記第2シールリップ部は、前記ウォータージャケット内に挿入された際に、前記ウォータージャケットの上部を閉塞する閉塞部材に接する長さに形成され、該閉塞部材との間で前記スペーサー本体の高さ方向の位置決め及び抜け止めを兼ねていることを特徴とする前記2記載のウォータージャケットスペーサー。
4.前記ウォータージャケットの上部を閉塞する閉塞部材と、前記スペーサー本体の間に配置され、前記スペーサー本体の高さ方向の位置決め及び抜け止めを行う抜け止め部材を備えることを特徴とする前記1記載のウォータージャケットスペーサー。
5.前記抜け止め部材の前記第1シールリップ部側の表面に、前記ウォータージャケット内への挿入抵抗を小さくするための突起部が設けられていることを特徴とする前記4記載のウォータージャケットスペーサー。
6.前記突起部は、前記ウォータージャケットの下部に向かうに従って突出高さが低くなるテーパー状に形成されていることを特徴とする前記5記載のウォータージャケットスペーサー。
7.前記第1シールリップ部の前記抜け止め部材側の表面に、前記ウォータージャケット内への挿入抵抗を小さくするための突起部が設けられていることを特徴とする前記4記載のウォータージャケットスペーサー。
8.前記突起部は、前記ウォータージャケットの下部に向かうに従って突出高さが高くなるテーパー状に形成されていることを特徴とする前記7記載のウォータージャケットスペーサー。
9.前記スペーサー本体の下端部に、前記ウォータージャケットのボア側内壁面及び又は反ボア側内壁面と密接するビード部又は第3シールリップ部が設けられていることを特徴とする前記1~8の何れかに記載のウォータージャケットスペーサー。
10.前記第1シールリップ部はソリッドゴムであることを特徴とする前記1~9の何れかに記載のウォータージャケットスペーサー。
11.前記第2シールリップ部はソリッドゴムであることを特徴とする前記2又は3記載のウォータージャケットスペーサー。
図1は、本発明の第1の実施形態に係るウォータージャケットスペーサーが適用された水冷エンジンのシリンダブロックの平面図であり、シリンダブロックを1点鎖線で示している。図2は、図1中の(ii)-(ii)線に沿う断面図、図3は、ウォータージャケットから取り外した状態の第1の実施形態に係るウォータージャケットスペーサーの断面図である。
図7は、本発明の第2の実施形態に係るウォータージャケットスペーサーが適用された水冷エンジンのシリンダブロックの平面図であり、シリンダブロックを1点鎖線で示している。図8は、図7中の(viii)-(viii)線に沿う断面図、図9は、ウォータージャケットから取り外した状態の第2の実施形態に係るウォータージャケットスペーサーの断面図、図10は、第2の実施形態に係るウォータージャケットスペーサーの第2シールリップ部を説明する一部断面で示す斜視図である。
図11に示すように、ウォータージャケットスペーサー2のスペーサー本体20には、下端に行くに従って先細り状となるテーパー部221を設けることができる。テーパー部221は、合成樹脂芯材21の両面の弾性体22を下端に行くに従って次第に肉薄状にすることによって形成されている。これにより、ウォータージャケットスペーサー2を型成形した際の型抜きを良好にすることができる。
10:スペーサー本体
11:合成樹脂芯材
12:弾性体
13:第1シールリップ部
13a:反ボア側の側面
14:抜け止め部材
141:湾曲板
142:連結部
143:間隙部
144:突起部
2:ウォータージャケットスペーサー
20:スペーサー本体
21:合成樹脂芯材
22:弾性体
23:第1シールリップ部
24:第2シールリップ部
24a:切欠部
25:ビード部
26:第3シールリップ部
100:シリンダブロック
101:ボア
102:ウォータージャケット
102a:ボア側内壁面
102b:反ボア側内壁面
103:ボア壁
104:ピストン
105:冷却水供給路
105a:冷却水流入口
106:冷却水排出路
106a:冷却水流出口
200:シリンダヘッド
300:シリンダヘッドガスケット
S:隙間
Claims (11)
- ボア周囲のシリンダブロックに設けられたウォータージャケット内に挿入され、該ウォータージャケットの内壁面に開口する冷却水流入口から該ウォータージャケット内に流入される冷却水の流れを調整するウォータージャケットスペーサーにおいて、
スペーサー本体の上端部に、前記ウォータージャケットのボア側内壁面と接して、該ボア側内壁面と前記スペーサー本体との間に形成される隙間を密封する第1シールリップ部が設けられていることを特徴とするウォータージャケットスペーサー。 - 前記スペーサー本体の上端部に、前記ウォータージャケットの反ボア側内壁面と接して弾性変形し、その際の反力によって前記第1シールリップ部を前記ウォータージャケットのボア側内壁面に密接させる第2シールリップ部が設けられていることを特徴とする請求項1記載のウォータージャケットスペーサー。
- 前記第2シールリップ部は、前記ウォータージャケット内に挿入された際に、前記ウォータージャケットの上部を閉塞する閉塞部材に接する長さに形成され、該閉塞部材との間で前記スペーサー本体の高さ方向の位置決め及び抜け止めを兼ねていることを特徴とする請求項2記載のウォータージャケットスペーサー。
- 前記ウォータージャケットの上部を閉塞する閉塞部材と、前記スペーサー本体の間に配置され、前記スペーサー本体の高さ方向の位置決め及び抜け止めを行う抜け止め部材を備えることを特徴とする請求項1記載のウォータージャケットスペーサー。
- 前記抜け止め部材の前記第1シールリップ部側の表面に、前記ウォータージャケット内への挿入抵抗を小さくするための突起部が設けられていることを特徴とする請求項4記載のウォータージャケットスペーサー。
- 前記突起部は、前記ウォータージャケットの下部に向かうに従って突出高さが低くなるテーパー状に形成されていることを特徴とする請求項5記載のウォータージャケットスペーサー。
- 前記第1シールリップ部の前記抜け止め部材側の表面に、前記ウォータージャケット内への挿入抵抗を小さくするための突起部が設けられていることを特徴とする請求項4記載のウォータージャケットスペーサー。
- 前記突起部は、前記ウォータージャケットの下部に向かうに従って突出高さが高くなるテーパー状に形成されていることを特徴とする請求項7記載のウォータージャケットスペーサー。
- 前記スペーサー本体の下端部に、前記ウォータージャケットのボア側内壁面及び又は反ボア側内壁面と密接するビード部又は第3シールリップ部が設けられていることを特徴とする請求項1~8の何れかに記載のウォータージャケットスペーサー。
- 前記第1シールリップ部はソリッドゴムであることを特徴とする請求項1~9の何れかに記載のウォータージャケットスペーサー。
- 前記第2シールリップ部はソリッドゴムであることを特徴とする請求項2又は3記載のウォータージャケットスペーサー。
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JP7124764B2 (ja) * | 2019-03-04 | 2022-08-24 | トヨタ自動車株式会社 | シリンダブロック |
CN110748432B (zh) * | 2019-07-30 | 2021-01-15 | 中国第一汽车股份有限公司 | 一种导流嵌件及气缸体水套 |
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