Internal-combustion engine valve timing control apparatus
AssigneeHitachi Automotive Systems, Ltd.
InventorsKuninaga Hatsugai, Kenji Sato
Life of this patent
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Abstract
Provided is a valve timing control apparatus, for an internal combustion engine, capable of sufficiently draining hydraulic oil from between a pulley and a housing body. The pulley includes a through-hole extending axially therethrough at a position radially outward with respect to the outer peripheral surface of the housing body. The through-hole is formed so as to extend over a bottom portion and cylindrical portion of the pulley.
Claims15
A valve timing control apparatus for an internal combustion engine, the valve timing control apparatus comprising:
- a housing body formed in a cylindrical shape, and including a plurality of shoes formed so as to project from an inner peripheral surface of the housing body;
- a vane rotor including a rotor configured to rotate integrally with a camshaft of the internal combustion engine, and a vane formed so as to project from an outer peripheral surface of the rotor and dividing a space between adjacent shoes of the plurality of shoes into an advance angle chamber and a retard angle chamber;
- and
- a pulley including a cylindrical portion formed in a cylindrical shape, configured such that rotation from a crankshaft is transmitted to an outer peripheral side of the pulley, and accommodating the housing body at an inner peripheral side of the pulley, and a bottom portion closing a first side of the housing body and to which the housing body is secured;
- and
- a plate closing a second side of the housing body,
- wherein the pulley includes a through-hole extending therethrough in a rotation axis direction of the pulley at a position radially outward with respect to an outer peripheral surface of the housing body,
- wherein the cylindrical portion includes a groove formed on an inner peripheral surface of the cylindrical portion, the groove extending in the rotation axis direction of the pulley, and
- wherein the groove is in communication with the through-hole.
A valve timing control apparatus for an internal combustion engine, the valve timing control apparatus comprising:
- a housing body formed in a cylindrical shape, and including a plurality of shoes formed so as to project from an inner peripheral surface of the housing body;
- a vane rotor including a rotor configured to rotate integrally with a camshaft of the internal combustion engine, and a vane formed so as to project from an outer peripheral surface of the rotor and dividing a space between adjacent shoes of the plurality of shoes into an advance angle chamber and a retard angle chamber;
- and
- a pulley including a cylindrical portion formed in a cylindrical shape, configured such that rotation from a crankshaft is transmitted to an outer peripheral side of the pulley, and accommodating the housing body at an inner peripheral side of the pulley, and a bottom portion closing a first side of the housing body and to which the housing body is secured;
- and
- a plate closing a second side of the housing body,
- wherein the pulley includes a through-hole extending therethrough in a rotation axis direction of the pulley at a position radially outward with respect to an outer peripheral surface of the housing body, and
- wherein the through-hole is connected to an inner peripheral surface of the cylindrical portion without a step in the rotation axis direction of the pulley.
A valve timing control apparatus for an internal combustion engine, the valve timing control apparatus comprising:
- a housing body formed in a cylindrical shape;
- and
- a pulley including a cylindrical portion formed in a cylindrical shape, configured such that rotation from a crankshaft is transmitted to an outer peripheral side of the pulley, and accommodating the housing body at an inner peripheral side of the pulley, and a bottom portion closing a first end side of the housing body and to which the housing body is secured,
- wherein the pulley includes a through-hole extending therethrough in a rotation axis direction of the pulley at a position radially outward with respect to an outer peripheral surface of the housing body, and
- wherein the cylindrical portion includes a groove formed on an inner peripheral surface of the cylindrical portion, the groove extending in the rotation axis direction of the pulley, and
- wherein the groove is in communication with the through-hole.
Dependencies are inferred from the claim text.