Valve timing control device for internal combustion engine
AssigneeHitachi Automotive Systems, Ltd.
InventorsSeijiro NARITA, Toru SHINOMIYA, Kenji SATO
Life of this patent
Estimating the term…
Abstract
There is provided an engagement groove (31) which is formed in a first shoe (S1) of first to fourth shoes (S1), (S2), (S3), (S4) at a circumference position at which the engagement groove (31) is not overlapped an abutment surface (30) with a first vane (V1), which includes a pair of side surfaces (31a) and (31a) that are substantially parallel to the abutment surface (30), and with which a positioning pin (19) protruding from a sprocket (13) is engaged, so as to match phases of a housing main body (11) and the sprocket (13) in a rotation direction.
Claims17
A valve timing control device for an internal combustion engine, the valve timing control device comprising:
- a housing main body which has a cylindrical shape having openings formed on both end sides in an axial direction, and which includes a plurality of shoes formed on an inner circumference side of the housing main body to protrude from the inner circumference side;
- a vane rotor which is fixed on a cam shaft, which is received within the housing main body, which is arranged to be rotated relative to the housing main body, and which includes a plurality of vanes each separating a portion between the shoes to an advance angle operation chamber and a retard angle operation chamber;
- a pair of plate members closing the both end side openings of the housing main body;
- a plurality of bolts arranged to fix the housing main is body and the pair of the plate members together through bolt insertion holes formed in the shoes to penetrate the shoes;
- a specific vane of the vanes which has a circumferential width larger than circumferential widths of the other vanes;
- a specific shoe of the shoes which includes an abutment surface on which one circumferential side surface of the specific vane is abutted;
- a recessed portion which is formed in the specific shoe at a predetermined circumferential position at which the recessed portion is not overlapped with the abutment surface of the specific shoe in a radial direction of the housing main body, and which includes a pair of side surfaces that are substantially parallel to the abutment surface;
- and
- a raised portion which is provided to at least one of the pair of the plate members, and which is arranged to be engaged with the recessed portion.
A valve timing control device for an internal combustion engine, the valve timing control device comprising:
- a housing main body which has a cylindrical shape having at least an opening formed on one end side in an axial direction, and which includes a plurality of shoes formed on an inner circumference side of the housing main body to protrude from the inner circumference side;
- a vane rotor which is fixed on a cam shaft, which is received within the housing main body, which is arranged ii to be rotated relative to the housing main body, and which includes a plurality of vanes each separating a portion between the shoes to an advance angle operation chamber and a retard angle operation chamber;
- a plate member closing the opening of the housing main body;
- a plurality of bolts arranged to fix the housing main body and the pair of plate members together through bolt insertion holes formed in the shoes to penetrate the shoes;
- a lock mechanism including;
- a through hole formed in a specific vane of the vanes to penetrate through the specific vane,
- a lock member slidably received within the through hole,
- a lock recessed portion in which the lock member is engaged, and
- an urging member received within the through hole, and arranged to urge the lock member toward the lock recessed portion,
- the lock mechanism being arranged to restrict a relative rotation between the housing main body and the vane rotor by the engagement of the lock member with the lock recessed portion,
- a recessed portion formed in a specific shoe of the plurality of the shoes that includes an abutment surface on which the specific vane is abutted in a state where the lock member is inserted and engaged in the lock recessed portion, and provided on a side circumferentially opposite to the abutment surface with respect to the bolt insertion hole;
- and
- a raised portion which is provided to the plate member, and which is arranged to be engaged with the recessed portion.
Dependencies are inferred from the claim text.