Control valve for valve timing control device and valve timing control device for internal combustion engine
First Claim
1. A control valve for a valve timing control device equipped with a driving rotary member adapted to receive a rotational force transmitted from a crankshaft and having an operating chamber formed therein, and a driven rotary member fixed to one axial end of a camshaft and rotatably housed in the driving rotary member so as to partition the operating chamber into a phase-advance working chamber and a phase-retard working chamber, and configured to relatively rotate to either a phase-advance side or a phase-retard side with respect to the driving rotary member by supply and discharge of working fluid for both of the working chambers, the control valve comprising:
- a cylindrical valve body configured to axially fixedly connect the driven rotary member to the camshaft;
a sleeve fixedly connected to an inner periphery of the valve body; and
a spool valve element axially slidably housed in the sleeve and configured to perform switching between supply and discharge of the working fluid to and from each of the working chambers,wherein the valve body has a male screw part formed on an outer peripheral surface of the valve body, and an introduction port, into which working fluid from a discharge passage of an oil pump driven by an internal combustion engine is introduced, the introduction port being formed at an axial distal end of the valve body,wherein the sleeve has passage grooves formed in an outer peripheral surface along an axial direction and configured to communicate with the introduction port, and oil holes formed as radial through holes at positions substantially corresponding to the passage grooves, andwherein the male screw part, the sleeve, and the spool valve element are arranged to overlap with each other in an axial cross-section of the valve body.
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Accused Products
Abstract
A control valve is configured to reduce an axial length of a device as much as possible, thereby improving its mountability. The valve is equipped with a valve body functioning as a cam bolt for connecting a vane rotor to one end of a camshaft, a sleeve fixed to an inner peripheral surface of the valve body, and a spool valve element axially slidably housed in the sleeve for switching between supply and discharge of working fluid to and from each of a phase-retard working chamber and a phase-advance working chamber. The valve body has a male screw part formed on an outer peripheral surface and screwed into a female screw part formed in a cam bolt hole. The position of formation of the male screw part and the position of the spool valve element are arranged to overlap with each other in an axial cross-section.
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Citations
14 Claims
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1. A control valve for a valve timing control device equipped with a driving rotary member adapted to receive a rotational force transmitted from a crankshaft and having an operating chamber formed therein, and a driven rotary member fixed to one axial end of a camshaft and rotatably housed in the driving rotary member so as to partition the operating chamber into a phase-advance working chamber and a phase-retard working chamber, and configured to relatively rotate to either a phase-advance side or a phase-retard side with respect to the driving rotary member by supply and discharge of working fluid for both of the working chambers, the control valve comprising:
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a cylindrical valve body configured to axially fixedly connect the driven rotary member to the camshaft; a sleeve fixedly connected to an inner periphery of the valve body; and a spool valve element axially slidably housed in the sleeve and configured to perform switching between supply and discharge of the working fluid to and from each of the working chambers, wherein the valve body has a male screw part formed on an outer peripheral surface of the valve body, and an introduction port, into which working fluid from a discharge passage of an oil pump driven by an internal combustion engine is introduced, the introduction port being formed at an axial distal end of the valve body, wherein the sleeve has passage grooves formed in an outer peripheral surface along an axial direction and configured to communicate with the introduction port, and oil holes formed as radial through holes at positions substantially corresponding to the passage grooves, and wherein the male screw part, the sleeve, and the spool valve element are arranged to overlap with each other in an axial cross-section of the valve body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A valve timing control device for an internal combustion engine, comprising:
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a driving rotary member adapted to receive a rotational force transmitted from a crankshaft and having an operating chamber formed therein; a driven rotary member fixed to one axial end of a camshaft and rotatably housed in the driving rotary member so as to partition the operating chamber into a phase-advance working chamber and a phase-retard working chamber, and configured to relatively rotate to either a phase-advance side or a phase-retard side with respect to the driving rotary member by supply and discharge of working fluid for both of the working chambers; and a control valve configured to perform supply-and-discharge control of the working fluid force-fed from an oil pump to and from each of the working chambers, the control valve comprising; a cylindrical valve body having a male screw part formed on an outer peripheral surface of the valve body for fixing the driven rotary member to the camshaft; a sleeve fixedly connected to an inner periphery of the valve body; a spool valve element axially slidably housed in the sleeve and configured to perform switching between supply and discharge of the working fluid to and from each of the working chambers; and an actuator configured to control a movement of the spool valve element, wherein the valve body has an introduction port, into which working fluid from a discharge passage of the oil pump driven by the internal combustion engine is introduced, the introduction port being formed at an axial distal end of the valve body, wherein the sleeve has passage grooves formed in an outer peripheral surface along an axial direction and configured to communicate with the introduction port, and oil holes formed as radial through holes at positions substantially corresponding to the passage grooves, and wherein the male screw part, the sleeve, and the spool valve element are arranged to overlap with each other in an axial cross-section of the valve body. - View Dependent Claims (14)
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Specification