Valve timing controller
First Claim
1. A valve timing controller comprising:
- a driving side rotation member that synchronously rotates with a crankshaft of an internal combustion engine;
a driven side rotation member which is disposed coaxially with a rotary shaft center of the driving side rotation member and rotates integrally with a valve opening/closing cam shaft;
an advancing chamber and a retarding chamber which are formed between the driving side rotation member and the driven side rotation member;
a valve unit that is disposed coaxially with the rotary shaft center and controls feeding and discharging of a fluid to and from the advancing chamber and the retarding chamber; and
a tubular valve case which has an internal space that extends in a direction along the rotary shaft center, accommodates the valve unit in the internal space, has an opening that is open to an outside at one end in the direction along the rotary shaft center, and has a bottom portion at an other end,wherein the valve unit includesa fluid supply pipe having a base end portion accommodated on a bottom portion side of the valve case, and a pipeline portion, wherein the pipeline portion extends along the rotary shaft center from the base end portion toward an opening side of the valve case, has a diameter smaller than a diameter of the base end portion, and has a bottom surface, anda spool which is disposed slidably in the direction along the rotary shaft center in a state of being guided on an inner peripheral surface of the valve case and an outer peripheral surface of the pipeline portion of the fluid supply pipe,the valve case includes an advancing port and a retarding port which are formed across the internal space from the outer peripheral surface and respectively communicate with the advancing chamber and the retarding chamber,the spool includes a plurality of land portions formed at an outer periphery of the spool, and an intermediate hole portion that is formed in an intermediate position of a pair of adjacent land portions of the plurality of land portions and configured to communicate with the advancing port or the retarding port from an inside of the spool by a sliding movement of the spool,the fluid supply pipe includes a supply port that is provided at an outer periphery of a distal end portion of the pipeline portion and is configured to supply the fluid from an inside of the fluid supply pipe to the intermediate hole portion, and to receive the supply of the fluid from a side of the base end portion opposite the pipeline portion to the pipeline portion, andthe valve case has a first check valve that is provided on the bottom portion side of the valve case, and is configured to allow at least a part of the fluid discharged from the advancing chamber or the retarding chamber to a space between the valve case and the spool to flow from the space to a space further on the bottom portion side than on the base end portion side in the internal space.
1 Assignment
0 Petitions
Accused Products
Abstract
A valve timing controller includes: a driving side rotation member synchronously rotating with a crankshaft of an internal combustion engine; a driven side rotation member disposed coaxially with a rotary shaft center of the driving side rotation member and rotating integrally with a valve opening/closing cam shaft; advancing and retarding chambers formed between the driving side and driven side rotation members; a valve unit disposed coaxially with the rotary shaft center and controlling feeding and discharging of a fluid to and from the advancing and retarding chambers; and a tubular valve case having an internal space extending in a direction along the rotary shaft center, accommodating the valve unit in the internal space, having an opening at one end in the direction along the rotary shaft center, and having a bottom portion at the other end.
7 Citations
14 Claims
-
1. A valve timing controller comprising:
-
a driving side rotation member that synchronously rotates with a crankshaft of an internal combustion engine; a driven side rotation member which is disposed coaxially with a rotary shaft center of the driving side rotation member and rotates integrally with a valve opening/closing cam shaft; an advancing chamber and a retarding chamber which are formed between the driving side rotation member and the driven side rotation member; a valve unit that is disposed coaxially with the rotary shaft center and controls feeding and discharging of a fluid to and from the advancing chamber and the retarding chamber; and a tubular valve case which has an internal space that extends in a direction along the rotary shaft center, accommodates the valve unit in the internal space, has an opening that is open to an outside at one end in the direction along the rotary shaft center, and has a bottom portion at an other end, wherein the valve unit includes a fluid supply pipe having a base end portion accommodated on a bottom portion side of the valve case, and a pipeline portion, wherein the pipeline portion extends along the rotary shaft center from the base end portion toward an opening side of the valve case, has a diameter smaller than a diameter of the base end portion, and has a bottom surface, and a spool which is disposed slidably in the direction along the rotary shaft center in a state of being guided on an inner peripheral surface of the valve case and an outer peripheral surface of the pipeline portion of the fluid supply pipe, the valve case includes an advancing port and a retarding port which are formed across the internal space from the outer peripheral surface and respectively communicate with the advancing chamber and the retarding chamber, the spool includes a plurality of land portions formed at an outer periphery of the spool, and an intermediate hole portion that is formed in an intermediate position of a pair of adjacent land portions of the plurality of land portions and configured to communicate with the advancing port or the retarding port from an inside of the spool by a sliding movement of the spool, the fluid supply pipe includes a supply port that is provided at an outer periphery of a distal end portion of the pipeline portion and is configured to supply the fluid from an inside of the fluid supply pipe to the intermediate hole portion, and to receive the supply of the fluid from a side of the base end portion opposite the pipeline portion to the pipeline portion, and the valve case has a first check valve that is provided on the bottom portion side of the valve case, and is configured to allow at least a part of the fluid discharged from the advancing chamber or the retarding chamber to a space between the valve case and the spool to flow from the space to a space further on the bottom portion side than on the base end portion side in the internal space. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A valve timing controller comprising:
-
a driving side rotation member that synchronously rotates with a crankshaft of an internal combustion engine; a driven side rotation member which is disposed coaxially with a rotary shaft center of the driving side rotation member and rotates integrally with a valve opening/closing cam shaft; an advancing chamber and a retarding chamber which are formed between the driving side rotation member and the driven side rotation member; a valve unit that is disposed coaxially with the rotary shaft center and controls feeding and discharging of a fluid to and from the advancing chamber and the retarding chamber; and a valve case in which an internal space is formed in a direction along the rotary shaft center across the cam shaft from an outside, wherein the valve unit is accommodated in the internal space, the valve unit includes a fluid supply pipe having a base end portion fitted into a cam shaft side in the internal space, and a pipeline portion that extends from the base end portion toward an external side in the internal space and has a diameter smaller than a diameter of the base end portion, and a spool which is disposed slidably in a direction along the rotary shaft center in a state of being guided on an inner peripheral surface of the valve case and an outer peripheral surface of the pipeline portion of the fluid supply pipe, the valve case includes an advancing port and a retarding port which are formed across the internal space from the outer peripheral surface and respectively communicate with the advancing chamber and the retarding chamber, the spool includes a pair of land portions formed at an outer periphery of the spool, and an intermediate hole portion that is formed in an intermediate position of the pair of land portions and configured to communicate with the advancing port or the retarding port from an inside of the spool by a sliding movement of the spool, the fluid supply pipe is configured to receive a supply of the fluid from a cam shaft side of the base end portion to the pipeline portion, and the fluid supply pipe includes a supply port that is provided at an outer periphery of a distal end portion of the pipeline portion and is configured to supply the fluid from an inside of the fluid supply pipe to the intermediate hole portion, and a first check valve that is provided in the base end portion and is configured to allow at least a part of the fluid discharged from the advancing chamber or the retarding chamber to a space between the valve case and the spool to flow from an external side of the base end portion to the cam shaft side. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
Specification