Cylinder block production method
First Claim
1. A cylinder block production method for producing a cylinder block in which a cast iron-made cylinder liner is enclosed within a cylinder block body by casting, comprising:
- a cast-enclosing step of enclosing the cylinder liner within the cylinder block body by casting, the cylinder block body comprising one of the group consisting of aluminum and an aluminum alloy, and the cylinder liner comprising flake graphite cast-iron; and
washing an outer peripheral wall surface of the cylinder liner and eroding a portion of a base structure of the cast iron forming the outer peripheral wall surface of the cylinder liner so as to form many small protrusions on the outer peripheral wall surface, including a key-shaped small protrusion, by fan-jetting a high-pressure fluid onto the outer peripheral wall surface of the cylinder liner, prior to the cast-enclosing step in order to improve strength of adhesion between the cylinder liner and the cylinder block body;
wherein a flow rate of the high pressure fluid is 2.67 to 10 L/min, and wherein a pressure of the high pressure fluid is 276 to 414 MPa.
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Accused Products
Abstract
A cylinder block production method is characterized by having, as a step prior to a cast-enclosing step of cast-enclosing a cast iron-made cylinder liner within a cylinder block body, an erosion-wash step of washing an outer peripheral wall surface of the cylinder liner and eroding a portion of a base structure of the cast iron forming the outer peripheral wall surface of the cylinder liner so as to form many small protrusions on the outer peripheral wall surface by jetting a high-pressure fluid onto the outer peripheral wall surface of the cylinder liner, in order to improve strength of adhesion between the cylinder liner and the cylinder block body. Since the base structure is partially eroded, complicated-shape small protrusions can be formed. Furthermore, sand and a mold release agent adhering to the outer peripheral wall surface of the cylinder liner can be removed. Therefore, the adhesion strength will improve.
17 Citations
5 Claims
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1. A cylinder block production method for producing a cylinder block in which a cast iron-made cylinder liner is enclosed within a cylinder block body by casting, comprising:
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a cast-enclosing step of enclosing the cylinder liner within the cylinder block body by casting, the cylinder block body comprising one of the group consisting of aluminum and an aluminum alloy, and the cylinder liner comprising flake graphite cast-iron; and
washing an outer peripheral wall surface of the cylinder liner and eroding a portion of a base structure of the cast iron forming the outer peripheral wall surface of the cylinder liner so as to form many small protrusions on the outer peripheral wall surface, including a key-shaped small protrusion, by fan-jetting a high-pressure fluid onto the outer peripheral wall surface of the cylinder liner, prior to the cast-enclosing step in order to improve strength of adhesion between the cylinder liner and the cylinder block body;
wherein a flow rate of the high pressure fluid is 2.67 to 10 L/min, and wherein a pressure of the high pressure fluid is 276 to 414 MPa. - View Dependent Claims (2, 3, 4, 5)
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Specification
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- Resources
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Current AssigneeToyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
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Original AssigneeToyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
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InventorsMichioka, Hirohumi, Miyamoto, Noritaka, Takenaka, Kazunari
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Primary Examiner(s)JIMENEZ, MARC QUEMUEL
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Application NumberUS10/382,845Publication NumberTime in Patent Office739 DaysField of Search298/880.6, 298/880.61, 29/810.6, 29/810.8, 29/907, 164/111, 164/100, 123/193.2US Class Current29/888.061CPC Class CodesB22D 19/0009 Cylinders, pistonsB22D 19/0081 pretreatment of the insert,...Y10T 29/4544 Liquid jetY10T 29/479 by shot peening or blastingY10T 29/4927 Cylinder, cylinder head or ...Y10T 29/49272 with liner, coating, or sleeve
