Valve opening and closing timing control apparatus

Patent metadata

Field	Value
Publication number	US-10161273-B2
Application number	US-201515319216-A
Country	US
Kind code	B2
Filing date	Oct 20, 2015
Priority date	Oct 21, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A valve opening and closing timing control apparatus includes a driving-side rotational body, a driven-side rotational body, a cylindrical member provided at an inner portion of the driven-side rotational body, a bolt including a cylinder shaft portion, an advanced angle flow passage and a retarded angle flow passage, an introduction passage bringing the working fluid supplied from an outside to flow, a first connection passage bringing the working fluid at the introduction passage to flow to an inner side of the cylinder shaft portion, a second communication passage and a third communication passage arranged at the cylinder shaft portion, and a control valve element provided at the inner side of the cylinder shaft portion, the second communication passage and the advanced angle flow passage being in communication with a void provided between the bolt head and the cylindrical member and between the cylinder shaft portion and the driven-side rotational body.

First claim

The invention claimed is:

1. A valve opening and closing timing control apparatus comprising
a driving-side rotational body synchronously rotating with a drive shaft of an internal combustion engine;
a driven-side rotational body supported at an inner side of the driving-side rotational body to be rotatable at a rotation axis serving as a common rotation axis between the driven-side rotational body and the driving-side rotational body, the driven-side rotational body integrally rotating with a camshaft for opening and closing a valve of the internal combustion engine;
a cylindrical member provided at an inner portion of the driven-side rotational body;
a bolt including a cylinder shaft portion inserted to be positioned at an inner side of the cylindrical member, a bolt head continuously provided to the cylinder shaft portion and an externally threaded portion being different from the bolt head and continuously provided to the cylinder shaft portion, the bolt connecting the driven-side rotational body and the camshaft;
an advanced angle chamber and a retarded angle chamber defined and provided between the driving-side rotational body and the driven-side rotational body;
an advanced angle flow passage and a retarded angle flow passage provided at the driven-side rotational body, the advanced angle flow passage being in communication with the advanced angle chamber, the retarded angle flow passage being in communication with the retarded angle chamber;
an introduction passage provided at least at one of the cylinder shaft portion and the cylindrical member between the cylinder shaft portion and the cylindrical member, the introduction passage bringing a working fluid supplied from an outside to flow along a direction of the rotation axis;
a first connection passage provided at the cylinder shaft portion to bring the working fluid at the introduction passage to flow to an inner side of the cylinder shaft portion, a second communication passage and a third communication passage arranged at different positions from each other at the cylinder shaft portion along the direction of the rotation axis; and
a control valve element provided at the inner side of the cylinder shaft portion to move in a reciprocating manner along the rotation axis, the control valve element supplying the working fluid from the first communication passage to the second communication passage or the third communication passage,
either a combination of the second communication passage and the advanced angle flow passage or a combination of the third communication passage and the retarded angle flow passage being in communication with a void provided between the bolt head and the cylindrical member and between the cylinder shaft portion and the driven-side rotational body.

2. The valve opening and closing timing control apparatus according to claim 1 , wherein an outer peripheral surface of the cylinder shaft portion is press-fitted to an inner peripheral surface of the cylindrical member.

3. The valve opening and closing timing control apparatus according to claim 1 , wherein the cylinder shaft portion includes an outer diameter greater than an outer diameter of the externally threaded portion,
the bolt includes a first contact surface provided at a stepped portion which is provided between the cylinder shaft portion and the externally threaded portion,
the cylindrical member includes a second contact surface which makes contact with the first contact surface at a time of an insertion of the cylinder shaft portion to the cylindrical member.

4. The valve opening and closing timing control apparatus according to claim 1 , wherein the cylinder shaft portion includes a large diameter portion adjacent to the bolt head and a small diameter portion including a smaller diameter than the large diameter portion and inserted to be positioned within the cylindrical member,
the cylindrical member includes a greater outer diameter than the large diameter portion.

5. The valve opening and closing timing control apparatus according to claim 4 , wherein at least one of a contact surface of the cylindrical member and a contact surface of the larger diameter portion, the contact surfaces at which the cylindrical member and the larger diameter portion face each other in the direction of the rotation axis, is separating from the rotation axis while approaching the bolt head.

6. The valve opening and closing timing control apparatus according to claim 1 , wherein a cutting is provided at an end portion of the cylindrical member facing the bolt head, the cutting conforming to an opening configuration of the second communication passage or the third communication passage.

7. The valve opening and closing timing control apparatus according to claim 1 , wherein a distance from the rotation axis to an end portion of the cylindrical member decreases towards the externally threaded portion.

Assignees

• Aisin Seiki

Inventors

• Asahi Takeo
• Noguchi Yuji
• Sakakibara Toru
• Kobayashi Masaki
• Kawai Yoshihiro
• Shigyo Hiromitsu
• Suganuma Hideyuki

Classifications

• F01L2250/02

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