Cover for internal combustion engine
AssigneeToyota Boshoku Kabushiki Kaisha
InventorsKensuke Doi, Yoji Horiuchi
Life of this patent
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Abstract
A chain cover includes a first member, which is made of a hard plastic, and a second member, which is made of a material different from the hard plastic. The first member includes a back face, which faces an engine main body. The second member is joined to the first member. Only the back face of the first member includes a groove, which receives a seal member. The seal member provides a seal between the first member and the engine main body.
Claims5
A cover for an internal combustion engine, the cover being attachable to an engine main body and covering a timing chain or a timing belt, the cover comprising:
- a first member that includes a facing surface, the facing surface facing the engine main body;
- and
- a second member that is made of a material different from the first member and is joined to the first member, wherein
- a groove portion is provided only in the facing surface of the first member,
- a seal member is fitted in the groove portion to provide a seal between the first member and the engine main body,
- the second member is plastic and includes:
- an insertion hole that receives an engine valve operation mechanism that is coupled to a camshaft;
- and
- an attachment portion provided in a peripheral portion around the insertion hole, the engine valve operation mechanism being attached to the attachment portion, and
- the second member is made of a material that satisfies at least one of a condition that a coefficient of linear expansion is lower than that of the first member or a condition that a water absorbency is lower than that of the first member.
A cover for an internal combustion engine, the cover being attachable to an engine main body and covering a timing chain or a timing belt, the cover comprising:
- a first member that includes a facing surface, the facing surface facing the engine main body;
- and
- a second member that is made of a material different from the first member and is joined to the first member, wherein
- a groove portion is provided only in the facing surface of the first member,
- a seal member is fitted in the groove portion to provide a seal between the first member and the engine main body,
- the second member includes:
- an insertion hole that receives an engine valve operation mechanism that is coupled to a camshaft;
- and
- an attachment portion provided in a peripheral portion around the insertion hole, the engine valve operation mechanism being attached to the attachment portion,
- the second member is made of a material that satisfies at least one of a condition that a coefficient of linear expansion is lower than that of the first member or a condition that a water absorbency is lower than that of the first member, and
- only the first member includes a through-hole through which a crankshaft extends.
A cover for an internal combustion engine, the cover being attachable to an engine main body and covering a timing chain or a timing belt, the cover comprising:
- a first member that includes a facing surface, the facing surface facing the engine main body;
- and
- a second member that is made of a material different from the first member and is joined to the first member, wherein
- a groove portion is provided only in the facing surface of the first member,
- a seal member is fitted in the groove portion to provide a seal between the first member and the engine main body,
- the cover includes tubular collars, the collars being configured to receive bolts for attaching the cover to the engine main body,
- the second member is joined to a face of the first member that is on a side opposite to the facing surface,
- the second member is insert molded with the collars as inserts, and includes tubular portions respectively surrounding the collars,
- the tubular portions contact outer surfaces of the collars along an entire axial length of the collars, and
- the first member includes surrounding portions, the surrounding portions respectively surrounding the tubular portions.
Dependencies are inferred from the claim text.