JP2000073715A - Control device for valve timing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the wrong operation of the relative phase hold operation of an inner rotor and outer roller by a lock pin. SOLUTION: The passage 35 for communicating the passage 23 for having operating oil supplied to and discharged from a receive hole 22 with a room R2 for lag and also for always communicating an evacuate hole 33 with one room R1a for advance, and the passage 34 for communicating the evacuate hole with one first fluid passage 24a for having the operating oil supplied to and discharged from one room R1a for advance in which the evacuate hole side opening is blocked at the other end of the lock pin, when a lock pin 80 is moved against the spring energizing force, are provided. The relative phase between the inner rotor 20 and outer rotor 30 intercepts the communication between one first fluid passage 24a and one room R1a for advance from a prescribed phase to a prescribed angle change.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve timing control device for controlling the timing of opening or closing an intake valve or an exhaust valve in a valve train of an internal combustion engine.

[0002]

2. Description of the Related Art As one type of valve opening / closing timing control device of this type, a rotating member that rotates together with a camshaft of an internal combustion engine, a sheath that is rotatably mounted on the rotating member relative to a predetermined range and rotates together with a crankshaft of the internal combustion engine. A plurality of fluid pressures divided into an advancing chamber and a retarding chamber by a plurality of vanes formed between the rotating member and the rotating member, respectively. Chamber, a plurality of first fluid passages for supplying and discharging fluid to the advance chamber, a plurality of second fluid passages for supplying and discharging fluid to the retard chamber, and formed inside the rotation transmitting member. A retreat hole for accommodating an engaging member spring-biased toward the rotating member, and the engaging member when the relative phase of the rotating member and the rotation transmitting member formed in the rotating member is synchronized with a predetermined phase. And a receiving hole into which one end of Third for supplying and discharging fluid into the receiving hole
And a fluid passage.
No. 84321.

In the valve timing control apparatus disclosed in the above publication, the relative phase between the rotating member and the rotation transmitting member becomes a predetermined phase when the rotating member is at the most retarded position with respect to the rotation transmitting member. Is set to the third
The fluid passage communicates with the retard chamber and the evacuation hole is
It is set to communicate with the advance chamber through the fluid passage, and the relative phase between the rotation member and the rotation transmission member is set to a predetermined phase when the rotation member is at the most advanced position with respect to the rotation transmission member. In this case, the third fluid passage is communicated with the advance chamber, and the evacuation hole is communicated with the retard chamber via the fourth fluid passage.

[0004]

In the valve timing control apparatus disclosed in the above publication, when the most retarded position is set to have a predetermined phase, the rotating member is rotated by a small angle from the most retarded position. When maintaining the phase of the rotation member and the rotation transmission member in a state of being relatively rotated to the advance side with respect to the rotation transmission member, the advance chamber and the retard chamber through the first fluid passage and the second fluid passage. The fluid is supplied to the rotating member, however, because the torque acting on the camshaft in the retarding direction is applied to the rotating member by the frictional force, the fluid pressure in the advancing chamber is greater than the retarding angle. The fluid is supplied so as to have a fluid pressure in the chamber. For this reason, at the time of the above-described phase holding, the retracting hole is more moved than the force for moving the engaging member to the outside of the receiving hole by the fluid pressure of the retarding chamber supplied to the receiving hole via the third fluid passage. The force for moving the engaging member toward the rotating member by the fluid pressure of the advance chamber supplied through the fourth fluid passage and the spring urging force is larger.

When the phase of the rotation member and the rotation transmission member is maintained, the rotation member vibrates at a small amplitude with respect to the rotation transmission member due to torque fluctuations acting on the camshaft. In some cases, the receiving hole and the evacuation hole may be at the most retarded position where they are opposed to each other when they are relatively rotated to the retard side. At this time, in the valve opening / closing timing control device disclosed in the above publication, the force for moving the engaging member toward the rotating member is smaller than the force for moving the engaging member out of the receiving hole. Is larger, one end of the engaging member is fitted into the receiving hole, the relative phase between the rotating member and the rotation transmitting member is held at the most retarded position, and thereafter the fluid is supplied to the advancing chamber. At the same time, even if the fluid in the retarding chamber is discharged to rotate the rotating member relatively to the rotation transmitting member toward the advance side, the rotating member and the rotation transmitting member do not move from the receiving hole to the retracting hole. May be prevented, and the operation of the valve timing control device may be disabled.

In the valve timing control apparatus disclosed in the above publication, when the most advanced position is set to have a predetermined phase, the rotation member is rotated by a small angle from the most advanced position. Similarly, when the phase of the rotation member and the rotation transmission member is maintained in a state of being relatively rotated to the retard side, the fluid is advanced so that the fluid pressure of the advance chamber becomes greater than the fluid pressure of the retard chamber. Rather than a force that is supplied to the angle chamber and the retard chamber and that tries to move the engaging member out of the receiving hole by the fluid pressure of the advancing chamber supplied to the receiving hole via the third fluid passage. The force for moving the engaging member toward the rotating member by the spring pressure and the fluid pressure of the retarding chamber supplied to the evacuation hole via the fourth fluid passage is smaller. However, in this state, due to torque fluctuations acting on the camshaft, the rotating member may be relatively rotated with respect to the rotation transmitting member to the advanced side, and the receiving hole and the retreat hole may be at the most advanced position where they face each other.
At this time, the fluid pressure in the retard chamber increases due to the movement of the rotating member, and the force for moving the engaging member toward the rotating member is less than the force for moving the engaging member out of the receiving hole. Is larger. Therefore, when the receiving hole and the retreat hole are at the most advanced position where they face each other, one end of the engaging member is fitted into the receiving hole, and the relative phase between the rotating member and the rotation transmitting member is maintained at the most advanced position. After that, even if fluid is supplied to the retarding chamber and fluid is discharged from the advancing chamber to rotate the rotating member relative to the rotation transmitting member toward the retard side, the engaging member is The relative rotation between the rotation member and the rotation transmission member is prevented without moving from the receiving hole to the evacuation hole, and the operation of the valve timing control device may not be possible.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to prevent an erroneous operation of a relative phase holding operation between a rotation member and a rotation transmission member by an engagement member in the valve timing control apparatus.

[0008]

Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned problems is to provide a rotating member which rotates together with one of a crankshaft and a camshaft of an internal combustion engine; A rotation transmitting member which is provided so as to be relatively rotatable and rotates together with the other of the crankshaft or the camshaft; and a plurality of vanes formed between the rotating member and the rotation transmitting member and provided on the rotating member respectively advance. A plurality of fluid pressure chambers divided into a corner chamber and a retard chamber; a plurality of first fluid passages for supplying and discharging fluid to the advance chamber; and a fluid supply and discharge to the retard chamber. A plurality of second fluid passages, an evacuation hole formed in the rotation transmission member or the rotation member, and a retraction hole for accommodating therein the rotation member or an engagement member spring-biased toward the rotation transmission member, and the rotation member Or before A receiving hole formed in the rotation transmitting member, into which one end of the engaging member is fitted when a relative phase between the rotating member and the rotation transmitting member is synchronized at a predetermined phase; A valve opening / closing timing control device provided with a fluid passage, wherein the third fluid passage is communicated with the retarding chamber or the advance chamber, and the evacuation hole is connected to one of the advance chambers or one of the advance chambers. A fourth fluid passage that constantly communicates with the retard chamber, and one first fluid passage or the first fluid passage that supplies and discharges the evacuation hole to the one advance chamber.
One of the second fluid passages for supplying and discharging the fluid to and from the two retard chambers, and the other end of the engagement member at the other end of the engagement member when the engagement member moves against the spring urging force. A fifth fluid passage having an opening closed; and providing communication between the fourth fluid passage and the fifth fluid passage until a relative phase between the rotation member and the rotation transmitting member changes by a predetermined angle from a predetermined phase. It is to shut off while.

According to the above-described means, the rotating member is rotated relative to the rotation transmitting member by a small angle from the most retarded position (most advanced position) to the advanced side (retarded side). When the relative phase of the rotation transmission member and the
The communication between the fluid passage (second fluid passage) and one advance chamber (one retard chamber) is interrupted, and one first fluid passage (second fluid passage) engages one end on the evacuation hole side. The other end of the fifth fluid passage closed by the member is communicated, and one advance chamber (one retard chamber) is communicated with the evacuation hole via the fourth fluid passage. When the phase is held, the rotating member vibrates at a small amplitude with respect to the rotation transmitting member due to a torque fluctuation acting on the camshaft, and the rotating member is retarded (advanced side) with respect to the rotation transmitting member from the holding position. There is a case where the receiving hole 2 and the evacuation hole are at the most retarded position (most advanced position) where the evacuation hole is opposed to each other when rotating relatively. Although the volume of the sealed space leading to the chamber decreases and the pressure in the evacuation hole increases, the operating oil flows from the retard chamber (advance chamber) through the third fluid passage 23 into the receiving hole. Since the supplied engagement member is pushed and pressed against the inner peripheral surface of one side of the evacuation hole by the hydraulic oil supplied through the fifth fluid passage, the engagement member is fitted into the receiving hole. Without being held at the evacuation position in the evacuation hole. Thereby, the erroneous operation of the relative phase holding operation of the rotation member and the rotation transmission member by the engagement member is properly prevented, and accurate relative rotation of the rotation member with respect to the rotation transmission member is guaranteed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a valve timing control apparatus according to the present invention will be described below with reference to the drawings.

The valve opening / closing timing control device shown in FIGS. 1 to 5 comprises a rotation mechanism comprising an internal rotor 20 integrally mounted on the tip of a camshaft 10 rotatably supported by a cylinder head 110 of an internal combustion engine. A member, an outer rotor 30, a front plate 40, and a cap 4 which are externally rotatable relative to the camshaft 10 and the inner rotor 20 within a predetermined range.
1, a rotation transmitting member including a rear plate 50, a timing pulley 60, and the like, six vanes 70 attached to the internal rotor 20, a lock pin 80 attached to the external rotor 30, and the like. Timing pulley 60
As is well known, the rotary power is transmitted clockwise in FIG. 2 from the crankshaft of the internal combustion engine via a crank pulley and a resin or rubber timing belt (all not shown). . The power transmission from the crankshaft to the rotation transmitting member may be performed via a timing chain or a timing gear adopted instead of the timing belt.

The camshaft 10 is an intake valve (not shown).
The camshaft 10 has a well-known cam (not shown) that opens and closes, and an advance passage 11 and a retard passage 12 that extend in the axial direction of the camshaft 10. The advance angle passage 11 is connected to a connection port 102 of the control valve 100 via a radial passage 13, an annular oil passage 14, and a connection passage P2. The retard passage 12 is connected to the connection port 101 of the control valve 100 via the annular oil passage 15 and the connection passage P1.

The control valve 100 is capable of moving the spool 104 to the left in FIG. 1 against the spring 105 by energizing the solenoid 103. When the energizing is not performed, the oil pump 11 is driven by the internal combustion engine.
2 is connected to the connection port 101, and the connection port 102 is connected to the discharge port 107.
The supply port 106 communicates with the connection port 102 when power is supplied, and the connection port 101
Are configured to communicate with the discharge port 107.
For this reason, when the solenoid 103 of the control valve 100 is de-energized, hydraulic oil is supplied from the oil pump 112 to the retard passage 12, and hydraulic oil is discharged from the advance passage 11 to the oil reservoir 113. Hydraulic oil is supplied to the advance passage 11 and discharged from the retard passage 12 to the oil reservoir 113. The energization of the solenoid 103 is duty-controlled by a control device (not shown).

The inner rotor 20 is integrally fixed to the camshaft 10 by a hollow bolt 19,
Each of the vanes 70 has a vane groove 21 for radially attaching each vane 70, and the state shown in FIGS. When the phase (the most retarded position) is reached, a receiving hole 22 into which a head 81 of the lock pin 80 is fitted by a predetermined amount, and a retarding passage defined by the vanes 70 from the retarding passage 12 in the receiving hole 22. A passage 23 for supplying and discharging hydraulic oil through the chamber R2 and a passage for supplying and discharging hydraulic oil from the advance passage 11 to the advance chamber R1 defined by each vane (excluding the upper right vane in FIG. 2) 70. 24, a passage 24a for supplying and discharging hydraulic oil from the advance passage 11 to the advance chamber R1a defined by the upper right vane 70 in FIG. 2, and a retard to the retard chamber R2 defined by each vane 70. Passage 1
2 has a passage 25 for supplying and discharging hydraulic oil. As shown in FIG. 4, the receiving hole 22 is a bottomed hole having a diameter larger than the outer diameter of the head 81 of the lock pin 80 by a predetermined amount, and has an annular shape formed by the head 81 of the lock pin 80. Hydraulic oil is supplied to and discharged from the bottom of the receiving hole 22 through the gap, and a chamfered portion 26 is formed around the open end. Each vane 70 is urged radially outward by a spring 71 (see FIG. 1) housed in the bottom of the vane groove 21.

The outer rotor 30 is relatively rotatably mounted on its inner periphery to the outer peripheral surface of the inner rotor 20 with a predetermined clearance (a minimal clearance through which hydraulic oil is interposed), and a front plate 40 is provided on both sides thereof. And the rear plate 50 are joined via seal members S1 and S2, and are integrally connected with the timing pulley 60 by bolts B1. A cap 41 is attached to the front plate 40 in a liquid-tight manner, whereby the advance passage 1 of the camshaft 10 is
A passage 42 that connects the passages 1 and 24 and 24a of the internal rotor 20 is formed. Each vane 70 is accommodated in the external rotor 30, and the advance chamber R
1, a recess 32 is formed by the internal rotor 20, the front plate 40 and the rear plate 50 to define a working chamber R0, which is divided into R1a and a retard chamber R2. An evacuation hole 33 for accommodating a spring 91 biased toward 20 is formed in the radial direction of the external rotor 30. Incidentally, in FIG.
Is an oil seal attached to the cylinder head 110 so as to engage with the outer periphery of the boss portion 52 of the rear plate 50. The boss portion 52 is rotatable at a predetermined gap on the inner periphery of the cam shaft 10 on the inner periphery. It is assembled, and is not substantially supported on the outer peripheral surface of the camshaft 10.

The evacuation hole 33 is closed at its outer end in a liquid-tight manner by a plug 92 and a sealing member 93, and a back pressure chamber R 3 is formed at the back of the lock pin 80. In the present embodiment, as shown in FIGS. 2 to 4, the back pressure chamber R3 is provided with a passage 34 and a passage 35 provided in the external rotor 30.
Are respectively connected to the passage 24a and the advance chamber R1a. The passage 34 is formed in a groove shape on the side surface of the external rotor 30 on the front plate 40 side, and has one end communicating with the evacuation hole 33 and the other end communicating with the passage 24a. The opening of the passage 34 on the evacuation hole side is provided with the lock pin 8 by hydraulic oil supplied to the receiving hole 22 through the passage 23.
When the tip of the head 81 moves to a position on the chamfered portion 26 against the biasing force of the spring 91, the lock pin 80 is disposed so as to be closed by the skirt portion 82 of the lock pin 80. In addition, the other end of the passage 34 on the side of the passage 24 a is set such that the relative phase between the internal rotor 20 and the external rotor 30 is a predetermined angle with respect to the external rotor 30 from a predetermined phase (the most retarded position shown in FIG. 2). The internal rotor 20 rotates relative to the external rotor 30 from the most retarded position to the advanced side by a predetermined angle or more relative to the external rotor 30 in a range up to a phase that is relatively rotated on the advance side (clockwise in FIG. 2). Then passage 24
It is arranged so that communication with a is cut off. Passage 3
5 is formed in a groove shape on the side surface of the external rotor 30 on the rear plate 50 side, and has one end communicating with the retreat hole 33 and the other end communicating with the advance chamber R1a. The opening of the passage 35 on the evacuation hole side is formed by the lock pin 80 and the spring 9.
The lock pin 80 is provided so as not to be closed by the skirt portion 82 even when the lock pin 80 moves into the evacuation hole 33 against the urging force of the lock pin 80. Incidentally, the plug 92 is prevented from coming off by the timing pulley 60.

In this embodiment, stoppers 36 and 37 formed at radially inner ends of circumferential ends of the recesses 32 defining the upper right working chamber R0 in FIG. 2 are located in the working chamber R0. The phase (relative rotation amount) adjusted by the valve opening / closing timing control device is limited by the contact of the vane 70 that makes contact. As shown in FIG. 3, a passage 25 is formed in the stopper portion 37 of the recess 32 on the side of the retard chamber R2 when the vane 70 contacts the stopper portion 37 (at the time of the most advanced angle). A communication groove 37a is formed to communicate with R2 (upper left in FIG. 3). On the other hand, as shown in FIG. 2, a communication groove is not formed in the stopper portion 36 on the advance chamber R1a side, so that the vane 70 comes into contact with the stopper portion 36 (at the time of the most retarded angle). The communication between the passage 24a and the advance chamber R1a is interrupted in a range up to a phase in which the rotor 20 is relatively rotated by a predetermined angle with respect to the external rotor 30 on the advance side.

The lock pin 80 has a head portion 81 and a skirt portion 82, and is fitted in the evacuation hole 33 in the skirt portion 82 so as to be movable in the radial direction of the external rotor 30.
The spring 91 is urged toward the inner rotor 20.

In the valve opening / closing timing control apparatus of the present embodiment configured as described above, when the internal combustion engine is stopped, each member is in the state shown in FIGS. 1 to 4 (the volume of the retarding chamber R2 becomes maximum). The lock pin 80 is locked in the most retarded state) and the oil pump 112
Is stopped, and hydraulic fluid is not supplied to the connection passages P1 and P2. When the internal combustion engine is started in this state, the operating oil is supplied from the oil pump 112 to the connection passage P1 through the control valve 100 in a non-energized state for at least a predetermined time, so that the retard passage of the camshaft 10 is supplied. Hydraulic oil is supplied to the retard chamber R2 through the passage 12 and the passage 25, and hydraulic oil is supplied to the receiving hole 22 through the passage 23. At the same time, the connection passage P2 is communicated with the oil reservoir 113 via the control valve 100 in a non-energized state, so that the advance chamber R1 is communicated with the oil reservoir 113 through the passage 24, the advance passage 11, and the like. , The advance chamber R1a has a passage 35, an evacuation hole 33, a passage 34, and a passage 24.
a and the oil reservoir 113 through the advance passage 11 and the like. At this time, a predetermined time is required until a predetermined amount of hydraulic oil is supplied to the receiving hole 22, and the head 81 of the lock pin 80 is fitted into the receiving hole 22 until a predetermined time has elapsed since the start of the internal combustion engine. Unnecessary relative rotation of the internal rotor 20 and the external rotor 30 due to a large torque fluctuation of the camshaft 10 at the time of starting the internal combustion engine is restricted, and unnecessary relative rotation of the rotating member and the rotation transmitting member is reduced. The accompanying trouble (for example, the sound of the vane 70) can be eliminated.

After a lapse of a predetermined time from the start of the start of the internal combustion engine, as shown in FIG. 5, the hydraulic oil supplied to the receiving hole 22 causes the lock pin 80 to move into the evacuation hole 33 against the urging force of the spring 91. The skirt 82 closes the evacuation hole side opening of the passage 34, the tip of the head 81 is held at the evacuation position located at the chamfer 26 of the receiving hole 22, and the back pressure chamber R3 is closed. Becomes Accordingly, the internal rotor 20 can be relatively rotated with respect to the external rotor 30 by a gap between the chamfered portion 26 and the tip of the head 81 of the lock pin 80.

In this state, by increasing the duty ratio of the current supplied to the solenoid 103 of the control valve 100, hydraulic oil is supplied to the advance passage 11 and hydraulic oil is discharged from the retard passage 12. Then, the advance chamber R1
The internal oil 20 is relatively rotated from the most retarded position toward the advanced angle side with respect to the rotation transmitting member such as the external rotor 30 by the hydraulic oil supplied to the outside, and the volume of the advance chamber R1a is enlarged, so that the passage 35 Hydraulic oil in the back pressure chamber R3 is sucked into the advance chamber R1a, and the lock pin 80 is further moved to the evacuation hole 33.
Retreat inside. Thereby, the duty ratio of the current supplied to the solenoid 103 of the control valve 100 is increased in accordance with the operation state of the internal combustion engine to discharge the hydraulic oil from the retarding chamber R2 and to the advancing chambers R1, R1a. By supplying the hydraulic oil, the rotation transmission members such as the inner rotor 20 and the outer rotor 30 are relatively rotated, and the vane 70 comes into contact with the stopper portion 37 to minimize the volume of the retard chamber R2 (the most advanced state). Angular position) and the control valve 1
By reducing the duty ratio of the current supplied to the solenoid 103 at 00 and discharging the hydraulic oil from the advance chambers R1 and R1a and supplying the hydraulic oil to the retard chamber R2, the internal rotor 20 and the external rotor The rotation transmission member such as 30 can be relatively rotated to change from the most advanced state to the state of the most retarded position shown in FIGS. 2 and 3, and the opening / closing timing of the intake valve in the valve train of the internal combustion engine can be accurately determined. Can be controlled. Further, the duty ratio of the current supplied to the solenoid 103 of the control valve 100 is appropriately controlled so that each advance chamber R
1. Supply hydraulic oil to each of R1a and each of the retard chambers R2 to maintain the relative phase of the internal rotor 20 and the external rotor 30 at an arbitrary phase between the most retarded position and the most advanced position. Is also possible. At this time, the torque acting on the camshaft 10 to the retard side by the frictional force is
Since the torque to the retard side acts on 0, the hydraulic oil is supplied so that the hydraulic pressure of the advance chambers R1 and R1a is greater than the hydraulic pressure of the retard chamber R2.

In the present embodiment, the inner rotor 20 and the outer rotor 30 are rotated in the state where the inner rotor 20 is relatively rotated to the advance side with respect to the rotation transmitting member such as the outer rotor 30 by a small angle from the most retarded position. When the phase of the transmission member is maintained, communication between the passage 24a and the advance chamber R1a is interrupted, and the passage 24a is connected to the other end of the passage 34. Here, one end of the passage 34 is connected to the skirt 82 of the lock pin 80.
The lock pin 80 is pressed by the hydraulic oil supplied from the oil pump 112 through the passage 24a and the passage 34 to the inner peripheral surface on one side of the evacuation hole 33, and is pressed against the passage 35. Hydraulic oil from the oil pump 112 is not supplied to the back pressure chamber R3, which is in communication with the advance chamber R1a via the lead angle chamber R1a, and the back pressure chamber R3 is in a sealed state.

When the phase is maintained, the internal rotor 2 is driven by torque fluctuations acting on the camshaft 10.
0 vibrates at a small amplitude with respect to the rotation transmitting member such as the external rotor 30, and when the internal rotor 20 relatively rotates from the holding position to the retard side with respect to the rotation transmitting member such as the external rotor 30, the receiving hole 22 is formed. The evacuation hole 33 may be located at the most retarded position facing the evacuation hole 33. At this time, in the present embodiment, although the volume of the sealed space from the back pressure chamber R3 to the advance chamber R1a is reduced and the pressure in the back pressure chamber R3 is increased, the receiving hole 22 is retarded. Hydraulic oil is supplied from the chamber R2 via the passage 23, and the lock pin 80 is pushed and pressed against the inner peripheral surface on one side of the evacuation hole 33 by the hydraulic oil supplied via the passage 34. The lock pin 80 is held in the retreat position in the retreat hole 33 without being fitted in the receiving hole 22. Thereby, the camshaft 1 can be used when the phase is maintained.
Due to the torque fluctuation acting on zero, the inner rotor 20 is relatively rotated from the holding position to the retard side with respect to the rotation transmitting member such as the outer rotor 30, and the receiving hole 22 and the retreat hole 33 are at the most retarded position where they face each other. Occasionally, the lock pin 80 is fitted into the receiving hole 22, and the relative phase of the rotation transmitting member such as the inner rotor 20 and the outer rotor 30 is held at the most retarded position. Thereafter, the fluid is supplied to the advance chamber R1. At the same time, even if the fluid in the retarding chamber R2 is discharged to rotate the internal rotor 20 to the advance side with respect to the rotation transmitting member such as the external rotor 30, the lock pin 80 is moved from the receiving hole 22 to the evacuation hole 33. The relative rotation of the rotation transmitting members such as the inner rotor 20 and the outer rotor 30 is prevented without moving to the position, and it is possible to accurately prevent the operation of the valve timing control device from being disabled.

In the above embodiment, the inner rotor 20
Becomes the most retarded position with respect to the rotation transmitting member such as the external rotor 30 so that the relative phase between the internal rotor 20 and the rotation transmitting member such as the external rotor 30 becomes a predetermined phase in which the receiving hole 22 and the retreat hole 33 face each other. And the receiving hole 22 is
3, and communicate with the retarding chamber R2 via the evacuation hole 3
3 is connected to the advance chamber R1a and the passage 24a for supplying and discharging the hydraulic oil to and from the advance chamber R1a via the passages 35 and 34, respectively, and the communication between the passage 24a and the advance chamber R1a is delayed. The internal rotor 20 is blocked from the angular position until the internal rotor 20 rotates relative to the rotation transmitting member such as the external rotor 30 by a predetermined angle, but the internal rotor is most advanced with respect to the rotation transmitting member such as the external rotor. By setting the angular position, the relative phase of the rotation transmitting member such as the internal rotor and the external rotor is set to be a predetermined phase in which the receiving hole 22 and the retreat hole 33 face each other,
The receiving hole communicates with the advance chamber, and the evacuation hole communicates with one retard chamber and one second fluid passage that supplies and discharges hydraulic oil to the one retard chamber. The communication between the two-fluid passage and one of the retard chambers may be blocked from the most advanced position until the internal rotor relatively rotates by a predetermined angle to the rotation transmitting member such as the external rotor. .

In the above embodiment, the present invention is applied to the valve opening / closing timing control device mounted on the intake camshaft 10, but the present invention is applied to the valve opening / closing timing control device mounted on the exhaust camshaft. Can be similarly implemented.

[0026]

As described above, according to the present invention, an erroneous operation of the relative phase holding operation between the rotating member and the rotation transmitting member by the engaging member can be prevented, and accurate relative rotation of the rotating member with respect to the rotation transmitting member is guaranteed. The operation reliability of the valve timing control device can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of a valve timing control apparatus according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along line CC of FIG. 1;

FIG. 5 is a cross-sectional view taken along the line CC of FIG. 1 shown in FIG. 1 and showing a state in which the engaging member (lock pin) is retracted into the retreat hole.

[Explanation of symbols]

 Reference Signs List 10 camshaft 11 advance passage 12 retard passage 20 internal rotor (rotating member) 22 receiving hole 23 passage (third fluid passage) 24, 24a passage (first fluid passage) 25 passage (second fluid passage) 30 external rotor (Rotation transmission member) 32 Recess 33 Retraction hole 34 Passage (fifth fluid passage) 35 Passage (fourth fluid passage) 36, 37 Stopper 40 Front plate (rotation transmission member) 50 Rear plate (rotation transmission member) 70 Vane 80 lock pin (engaging member) 91 spring R0 working chamber (fluid pressure chamber) R1, R1a advance chamber R2 retard chamber

Claims (3)

[Claims] A rotating member that rotates with one of a crankshaft and a camshaft of an internal combustion engine, and a rotation transmitting member that is mounted on the rotating member so as to be relatively rotatable within a predetermined range and rotates with the other of the crankshaft and the camshaft. A plurality of fluid pressure chambers formed between the rotating member and the rotation transmitting member, each of which is divided into an advancing chamber and a retarding chamber by a plurality of vanes provided on the rotating member, A plurality of first fluid passages for supplying and discharging the fluid to the advance chamber, a plurality of second fluid passages for supplying and discharging the fluid to the retard chamber, and formed inside the rotation transmitting member or the rotating member. An evacuation hole for accommodating an engaging member spring-biased toward the rotation member or the rotation transmission member, and a relative phase between the rotation member and the rotation transmission member formed in the rotation member or the rotation transmission member. A valve opening / closing timing control device comprising: a receiving hole into which one end of the engaging member is fitted when synchronized with a predetermined phase; and a third fluid passage for supplying and discharging fluid to and from the receiving hole. And a fourth fluid passage that constantly communicates the evacuation hole with one of the advancement chambers or one of the retardation chambers, and the evacuation hole. One of the first fluid passages for supplying and discharging the fluid to the one advance chamber or one of the second fluid passages for supplying and discharging the fluid to the one retard chamber is connected to the first fluid passage. A fifth fluid passage for closing the retreat hole side opening at the other end of the engagement member when moved against the spring urging force, wherein the one first fluid passage or the one second fluid is provided. The communication between the passage and the one advance chamber or the one retard chamber is performed by the rotation member and the rotation. Valve timing control apparatus being characterized in that so as to shut off until the relative phase of the reach member by a predetermined angle change from the predetermined phase. 2. The method according to claim 2, wherein the relative phase between the rotation member and the rotation transmission member is set to a predetermined phase by setting the rotation member at the most retarded position with respect to the rotation transmission member.
The third fluid passage communicates with the retard chamber or the second fluid passage, and the evacuation hole is connected to the one advance chamber and the first fluid passage through the fourth fluid passage and the fifth fluid passage. The first fluid passages respectively, and the one first
The communication between the fluid passage and the one advance chamber is blocked from the most retarded position until the rotation member relatively rotates to the rotation transmission member by a predetermined angle with respect to the rotation transmission member. The valve opening / closing timing control device according to claim 1, wherein 3. The relative phase between the rotating member and the rotation transmitting member is set to be a predetermined phase when the rotating member is at the most advanced position with respect to the rotation transmitting member,
The third fluid passage communicates with the advance chamber or the first fluid passage, and the evacuation hole is connected to the one retard chamber and the first fluid passage through the fourth fluid passage and the fifth fluid passage. One second fluid passage, and the one second fluid passage.
The communication between the fluid passage and the one retarding chamber is blocked from the most advanced position until the rotating member relatively rotates to the rotation transmitting member by a predetermined angle to the retard side. The valve opening / closing timing control device according to claim 1, wherein