| 主权项 |
1. A valve timing control apparatus for an internal combustion engine comprising:
a housing to which a rotational force is transmitted from a crank shaft, and which includes shoes formed on an inner circumference surface of the housing to protrude; a vane rotor which includes a rotor fixed to a cam shaft, and vanes that separate advance angle hydraulic chambers and retard angle hydraulic chambers between the shoes of the housing, and which is arranged to be rotated relative to the housing on one of an advance angle side and a retard angle side by a hydraulic fluid selectively supplied and discharged to and from the advance angle hydraulic chambers and the retard angle hydraulic chambers; a first lock member which is disposed in the vane rotor, which is arranged to be moved toward the housing by an urging force of a first urging member, and to be moved in a rearward direction against the urging force of the first urging member by receiving a hydraulic pressure, the first lock member having a first tip end; a second lock member which is disposed in the vane rotor, which is arranged to be moved toward the housing by an urging force of a second urging member, and to be moved in a rearward direction against the urging force of the second urging member by receiving the hydraulic pressure, the second lock member having a second tip end; a first lock recessed portion which is formed in the housing, and which the first tip end is arranged to be engageably inserted into, and thereby to restrict the vane rotor at a relative rotational position on the retard angle side relative to a position between a most advance angle position and a most retard angle position; a second lock recessed portion which is formed in the housing, and which the second tip end is arranged to be engageably inserted into, and thereby to restrict the vane rotor at a relative rotational position on the advance angle side relative to the position at which the relative rotation on the retard angle side is restricted by the first lock member and the first lock recessed portion; a first passage which is formed in the vane rotor, which extends in the radial direction at a position apart from the first lock member and the second lock member in the circumferential direction, which includes an opening portion located in an outer end portion of the first passage, and which receives a hydraulic pressure different from a hydraulic pressure within the advance angle hydraulic chambers and a hydraulic pressure within the retard angle hydraulic chambers; a second passage which is connected to the first passage and hydraulic pressure receiving portions of the first lock member and the second lock member; and a seal member which is press-fit in the opening portion of the outer end portion of the first passage. |
