CN112211691B

CN112211691B - Camshaft phaser assembly

Info

Publication number: CN112211691B
Application number: CN201910615292.2A
Authority: CN
Inventors: 阿里·贝拉克达; 格哈德·施蒂希
Original assignee: Schaeffler Holding China Co Ltd
Current assignee: Schaeffler Holding China Co Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2024-06-25
Anticipated expiration: 2039-07-09
Also published as: CN112211691A

Abstract

The present invention relates to a camshaft phaser assembly comprising a camshaft phaser (100); an oil connection portion (800) formed at one axial end of the camshaft (200); a center bolt (700), wherein the center bolt (700) connects the other axial side of the cam shaft phaser (100) with the oil connection part (800); a pressure coupling (400) mounted to the oil connection (800); and a control valve (300) provided outside the camshaft phaser (100). A storage cavity (102) is formed between the front cover (140) and the shell (101), a first oil path (A), a second oil path (B) and a third oil path (T) are arranged in the pressure connecting part (400), and a first radial flow passage (A1), a second radial flow passage (B1) and a third radial flow passage (T1) are arranged in the oil connecting part (800). A first axial flow passage (A2) and a second axial flow passage (B2) are also provided, and a central through hole (T2) is provided in the central bolt (700).

Description

Camshaft phaser assembly

Technical Field

The invention relates to a camshaft phaser assembly.

Background

In the related art, an engine valve timing system is a system for controlling valve opening and closing times of an engine of an automobile, which optimizes the operation performance of the engine by controlling the valve opening and closing times. In particular, the combustion chamber of an engine can be opened and closed by valves, which are operated by cams on respective camshafts. In addition, a reciprocating piston is accommodated in the combustion chamber, and drives the crankshaft. The rotational energy of the crankshaft is transmitted at its axial end via a transmission to a camshaft phaser. The camshaft phaser is axially disposed on the camshaft, receives rotational energy from the drive mechanism and outputs the rotational energy to the camshaft. The camshaft phaser can change the phase of the camshaft relative to the crankshaft.

The camshaft phasers according to the prior art are usually hydraulically actuated, for which purpose a central valve and components cooperating with the central valve are provided and a hydraulic circuit is formed therein, as is disclosed for example in patent application CN 103244225A.

Specifically, referring to fig. 1, the camshaft adjuster 4 (i.e., camshaft phaser) includes a stator 20 and a rotor 22 housed within the stator 20, the rotor 22 being concentrically housed within the stator 20 and having vanes 26 extending from a hub 24 of the rotor. The rotor 22 is held concentrically on a central screw 28 of a central valve 30 which is screwed into one of the camshafts 12 and in which a control piston 32 is accommodated in an axially movable manner, which control piston can be moved axially into the central screw 28 by a tappet, not shown, of the central magnet and can be pressed out of the central screw 28 axially by a spring, not shown. Depending on the position of the control piston 32 within the central screw 28, a pressure chamber (corresponding to a working or oil chamber), not shown, of the camshaft adjuster 4 is connected in a manner known per se to a pressure coupling 34 or to a volume accumulator coupling 36, via which hydraulic fluid can be pumped into and released from the pressure chamber accordingly. The stator 20 has an annular outer portion 38 from which a segment, not further shown, protrudes radially inwards. The annular outer part 38 is axially closed with a front cover 40 and a rear cover 42, wherein the covers 40, 42 are held on the annular outer part 38 via screws 44. On the outer circumference of the annular outer part 38, teeth 46 are formed, into which the transmission can be inserted. The central screw 28 has a radial bore 48 as the volume accumulator coupling 36, and is seated on the radial bore 48 by an axial passage 50 of the rotor 22. The channels 50 are arranged radially on a circumferential groove 52 of the rotor 22 on the radially inner side facing the central screw 28, so that the central valve 30 does not have to be screwed into the camshaft 12 in a predetermined angular position. The channel 50 leads into a volume reservoir 54, which is delimited by the rotor 22 and the front cover 40. The volume accumulator 54 is open via a non-return valve 56 to the pressure chamber of the camshaft adjuster 4, wherein hydraulic fluid can flow only from the volume accumulator 54 to the pressure chamber, so that the pressure chamber can suck the stored hydraulic fluid from the volume accumulator 54 under negative pressure. if the volume reservoir 54 is overflowed due to too much hydraulic liquid, excess hydraulic liquid is output via the tank connection 58, for example, to a tank, not shown. The tank connection 58 is closer to the rotational axis than the check valve 56, so that during operation of the camshaft adjuster hydraulic fluid reaches the check valve 56 first due to centrifugal forces before escaping via the tank connection 58. Furthermore, the pressure coupling 34 is directly connected to the accumulator coupling 36 via an axial slot 60 in the central screw 28. Thus, the axial groove 60 in the central screw 28 is a bypass, with which the flow of hydraulic fluid of the pressure coupling 34 bypasses the pressure chamber of the camshaft adjuster. In particular, the flow of hydraulic fluid from the pressure coupling 34 directly to the accumulator coupling 36 can be controlled by a 2/2 reversing valve 62, which is schematically shown in fig. 1. Furthermore, a sleeve 64 is arranged axially on the camshaft 12 and radially on the axial groove 60 in the central screw 28, the sleeve 64 preventing the hydraulic fluid from being discharged radially from the axial groove 60.

However, the central valve has disadvantages in use due to its complex structure, the relatively large number of cooperating components required, and the large space occupation.

Disclosure of Invention

In order to overcome the above-described drawbacks of the prior art, the present invention provides a novel camshaft phaser assembly that makes the structure of the camshaft phaser more compact, saves space, and thereby simplifies the complexity of the camshaft phaser and reduces the number of components by omitting a center valve in the camshaft phaser and disposing a control valve that replaces the center valve function at other locations of the engine.

In order to achieve the above object, the present invention adopts the following technical scheme.

The present invention provides a camshaft phaser assembly comprising:

A camshaft phaser including a stator and a rotor accommodated in the stator, a first working chamber and a second working chamber being formed between the stator and the rotor, both sides of the first working chamber and the second working chamber in an axial direction of the camshaft phaser being closed by a front cover and a rear cover, respectively, the camshaft phaser being provided with a housing on one side in the axial direction;

An oil connection portion formed at one axial end of the camshaft;

A central bolt connecting the other axial side of the cam shaft phaser with the oil connection portion,

In particular, the camshaft phaser assembly according to the present invention further comprises:

a pressure coupling mounted to the oil connection; and

A control valve disposed outside the camshaft phaser,

A storage chamber is constructed between the front cover and the housing,

A first oil way, a second oil way and a third oil way are arranged in the pressure connecting part, a first radial flow passage, a second radial flow passage and a third radial flow passage are arranged in the oil liquid connecting part, a first axial flow passage and a second axial flow passage are arranged at the rotor, the central bolt and the oil liquid connecting part, a central through hole is arranged in the central bolt,

The first radial flow passage connects the first oil passage and the first axial flow passage, the first axial flow passage communicates with the first working chamber, the second radial flow passage connects the second oil passage and the second axial flow passage, the second axial flow passage communicates with the second working chamber, the third radial flow passage connects the third oil passage and the central through hole, the central through hole communicates with the storage chamber for connection to an oil tank,

The control valve is provided with an oil supply inlet for supplying oil to the control valve, and a first control flow passage (A3), a second control flow passage, and a third control flow passage connected to the first oil passage, the second oil passage, and the third oil passage, respectively, so that the control valve can supply oil from the first oil passage to the first working chamber, from the second oil passage to the second working chamber, and from the third oil passage to the storage chamber.

In at least one embodiment, the camshaft phaser assembly further comprises a locking bolt mounting the housing to the housing of the engine, the locking bolt being provided with a cavity opposite and communicating with the central through hole of the central bolt, the cavity being connected to the storage cavity.

In at least one embodiment, an axial through-hole is provided in the housing at a location adjacent to the locking bolt, and a gap is provided between the housing and the outer shell, which gap communicates with the storage chamber through the axial through-hole.

In at least one embodiment, an axial through hole is provided in the front cover, and an axial passage communicating with the axial through hole is provided in the rotor and in the oil connecting portion, the axial passage communicating with the storage chamber through the axial through hole and being used for guiding out the oil in the storage chamber to the oil tank.

In at least one embodiment, the first oil passage, the second oil passage, and the third oil passage are disposed at adjacent circumferential positions of the oil connecting portion and are connected to corresponding first, second, and third radial flow passages in the oil connecting portion.

In at least one embodiment, at least two of the first oil passage, the second oil passage, and the third oil passage are provided at different circumferential positions of the oil connecting portion and are connected to corresponding first, second, and third radial flow passages in the oil connecting portion.

In at least one embodiment, the camshaft phaser assembly further includes an annular spacer sleeved outside the central bolt in a radial direction, the first axial flow passage is formed between an outer circumferential surface of the central bolt and an inner circumferential surface of the annular spacer, and the second axial flow passage is formed between the outer circumferential surface of the annular spacer and an inner circumferential surface of the rotor and an inner circumferential surface of the oil connection.

In at least one embodiment, the first axial flow passage is formed in the oil connecting portion, and the second axial flow passage is formed between an outer peripheral surface of the center bolt and an inner peripheral surface of the rotor and an inner peripheral surface of the oil connecting portion.

In at least one embodiment, the third radial flow passage extends obliquely relative to a radial direction of the oil connection from the pressure coupling portion toward the head of the center bolt until into a center through hole of the center bolt that extends axially to an axial end of the center bolt.

In at least one embodiment, a sealing device is provided between the oil connection and the rear cover of the camshaft phaser.

Drawings

Fig. 1 is a schematic cross-sectional illustration of a camshaft adjuster according to the prior art.

Fig. 2A and 2B are schematic cross-sectional structural views of a cam shaft phaser assembly according to a first embodiment of the present invention, fig. 2A being a cam shaft phaser connected to a cam shaft, and fig. 2B being a control valve provided separately from the cam shaft phaser.

Fig. 3A and 3B are schematic cross-sectional structural views of a cam shaft phaser assembly according to a second embodiment of the present invention, fig. 3A being a cam shaft phaser connected to a cam shaft, and fig. 3B being a control valve provided separately from the cam shaft phaser.

Fig. 4A and 4B are schematic cross-sectional structural views of a camshaft phaser assembly according to a third embodiment of the present invention.

Fig. 5A and 5B are schematic cross-sectional structural views of a camshaft phaser assembly according to a fourth embodiment of the present invention.

Description of the reference numerals

4. Central screw 30 central valve 32 control piston 34 pressure coupling 36 volume accumulator coupling 38 annular outer 40 front cover 42 rear cover 44 screw 46 teeth 48 radial bore 50 channel 52 circumferential groove 54 volume accumulator 56 check valve 58 tank coupling 60 axial groove 62 reversing valve 64 sleeve of camshaft adjuster 20 stator 22 rotor 24 hub 26 vane 28 central screw 30

100. The axial through hole 104 of the storage cavity 103 of the cam shaft phaser 101 is in clearance 120 with the front cover 142 and the rear cover 146 of the rotor 140 of the stator 122, the meshing part 200 of the cam shaft 300 control valve 310 and the pressure coupling part 500 of the cylinder body 400 of the engine, the shell 600 of the engine locks the central bolt 800 of the bolt 700, the oil connecting part 900 of the oil tank A1 of the first oil circuit B, the second oil circuit T, the third oil circuit OT, the first radial flow passage A1, the first control flow passage B1, the second radial flow passage B2, the second control flow passage B3, the second control flow passage T1, the third radial flow passage T2, the central through hole T3 of the third control flow passage P, and the oil supply inlet X is axial.

Detailed Description

The following description of the embodiments of the present invention refers to the accompanying drawings. The camshaft phaser according to the present invention has a generally cylindrical shape, and the axial, radial and circumferential directions of the present invention refer to the axial, radial and circumferential directions of the camshaft phaser, respectively, unless otherwise specified.

(First embodiment)

As shown in fig. 2A and 2B, the camshaft phaser assembly according to the first embodiment of the present invention includes a camshaft phaser 100, the camshaft phaser 100 being provided with and covered by a housing 101 on one axial side (left side in fig. 2A) and connected with an oil connection 800 formed by an end of one axial side (left side in fig. 2A) of a camshaft 200 on the other axial side (right side in fig. 2A). Similar to the offset type camshaft phaser of the related art, the camshaft phaser 100 includes a stator 120 and a rotor 122 accommodated in the stator 120, with a plurality of cavities formed between the stator 120 and the rotor 122 by contours of the both as a first working chamber and a second working chamber (not shown), respectively, to achieve control of rotational movement of the rotor 122 by fluid (e.g., engine oil) and thus adjustment of the camshaft phase by the camshaft phaser. The first and second working chambers are closed by a front cover 140 and a rear cover 142, respectively, on both sides in the axial direction X of the camshaft phaser 100, and a reservoir chamber 102 is configured between the front cover 140 and the housing 101, the reservoir chamber 102 being for connection to the tank OT.

The camshaft phaser assembly according to the first embodiment of the present invention includes a particularly hollow center bolt 700 to connect the other axial side (right side in fig. 2A) of the camshaft phaser 100 with the oil connection 800 of the camshaft 200. In particular, a hollow center bolt 700 passes through the center of the camshaft phaser 100 in the axial direction X, and the rotor 122 is disposed around the center bolt 700.

A pressure coupling 400 is installed on the oil connecting portion 800, and a plurality of oil passages, that is, a first oil passage a, a second oil passage B, and a third oil passage T are provided in the coupling 400, wherein the first oil passage a and the second oil passage B represent oil passages that finally pass to a first working chamber and a second working chamber in the camshaft phaser 100, respectively, and the third oil passage T represents oil passages that finally pass to an oil tank OT (not shown). Double-headed arrows near the marks a and B in the drawing indicate that the flow direction of the first oil passage a and the second oil passage B is bidirectional, and single-headed arrows near the mark T indicate that the flow path of the third oil passage T is unidirectional. The oil connecting portion 800 is provided therein with a first radial flow passage A1, a second radial flow passage B1, and a third radial flow passage T1 connected to the first oil passage a, the second oil passage B, and the third oil passage T in the pressure coupling portion 400, respectively, and a first axial flow passage A2 and a second axial flow passage B2 are provided at three of the rotor 122, the center bolt 700, and the oil connecting portion 800, and a center through hole T2 is provided in the center bolt 700.

Specifically, one end of the first radial flow passage A1 in the oil connecting portion 800 is connected to the first oil passage a in the pressure coupling portion 400, the other end is connected to the first axial flow passage A2 in the oil connecting portion 800, the first axial flow passage A2 extends axially as a whole and is connected to the first working chamber in the camshaft phaser 100 at the end opposite to the first radial flow passage A1, thereby realizing a passage of the first oil passage a with the first working chamber. One end of the second radial flow passage B1 in the oil connecting portion 800 is connected to the second oil passage B in the pressure coupling portion 400, and the other end is connected to the second axial flow passage B2 in the oil connecting portion 800, the second axial flow passage B2 extending axially as a whole and being connected to the second working chamber in the camshaft phaser 100 at an end opposite to the second radial flow passage B1, thereby realizing a passage of the second oil passage B with the second working chamber. Thus, fluid (e.g., engine oil) for operating the camshaft phaser 100 may enter the first and second working chambers of the camshaft phaser 100 via the above-described flow passages A1, A2, B1, B2 in the oil connection 800 through the first and second oil passages a, B provided in the pressure coupling 400, respectively, to achieve control of the camshaft phaser 100.

One end of the third radial flow passage T1 in the oil connection 800 is connected to the third oil passage T in the pressure coupling 400, and the other end communicates with a central through bore T2 of the central bolt 700, which central through bore T2 extends axially into the recess of the locking bolt 600, whereby the flow passage formed can be further led in a radially outward direction into the storage chamber 102, then out of the camshaft phaser 100 and finally into the oil tank OT (not shown). The third oil path T, the third radial flow path T1, the central through hole T2, the concave cavity of the locking bolt 600, and the storage cavity 102 are used as bypass circuits of the engine oil to assist in realizing the engine oil circulation. By thus providing the reservoir 102, the amount of oil required when returning oil to the working chamber can be quickly satisfied, thereby avoiding oil shortage.

In particular, in this embodiment, the first oil passage a in the pressure coupling 400 is connected to a first radial flow passage A1 extending in the oil connection 800 in the radial direction, the first radial flow passage A1 extending up to the depth of the outer wall of the center bolt 700 and here being connected to a first axial flow passage A2 extending in the axial direction X toward the camshaft phaser 100 against the outer wall of the center bolt 700, the first axial flow passage A2 extending until reaching into the camshaft phaser 100 and communicating with the first working chamber of the camshaft phaser 100, wherein the direction of extension of the first radial flow passage A1 is perpendicular to the direction of extension of the first axial flow passage A2. Similarly, the second oil passage B in the pressure coupling 400 is connected with a second radial flow passage B1 extending in the oil connecting portion 800 in the radial direction, the second radial flow passage B1 extending in the radial direction up to the depth of the radial outer periphery of the first axial flow passage A2, and then connected with a second axial flow passage B2 extending in the axial direction X toward the camshaft phaser 100 against the outer periphery of the first axial flow passage A2, the second axial flow passage B2 extending until reaching into the camshaft phaser 100 and communicating with the second working chamber of the camshaft phaser 100. The third oil passage T in the pressure coupling 400 is connected to a third radial flow passage T1 in the oil connection 800, which third radial flow passage T1 extends obliquely (preferably about 45 degrees) in the cross-sectional view with respect to the radial direction from the pressure coupling 400 toward the head of the center bolt 700 until entering the center through hole T2 of the center bolt 700.

It is understood that the first axial flow passage A2 and the second axial flow passage B2 may be formed near the outer peripheral surface of the center bolt 700 by, for example, sleeving an annular spacer on the radially outer side of the center bolt 700. Both ends of the annular partition may be supported to the rotor 122 and the oil connection 800 of the camshaft phaser 100, respectively. At this time, the first axial flow passage A2 may be formed between the outer circumferential surface of the center bolt 700 and the inner circumferential surface of the annular partition, and the second axial flow passage B2 may be formed between the outer circumferential surface of the annular partition and the inner circumferential surface of the rotor 122 and the oil connecting portion 800.

Preferably, as shown in fig. 2A, the camshaft phaser assembly according to the present invention further includes a lock bolt 600 that mounts the housing 101 to the housing 500 of the engine, the lock bolt 600 being provided with a cavity opposite and communicating with the center through hole T2 of the center bolt 700, the cavity being connected to the reservoir 102. An axial through hole 103 is provided in the housing 101 at a position close to the locking bolt 600, and a gap 104 is provided between the housing 101 and the case 500, the gap 104 communicating with the storage chamber 102 through the axial through hole 103. The bypass circuit of oil thus leaves the camshaft phaser 100 after leaving the reservoir 102 via the axial through-hole 103 and the gap 104 and finally enters the tank OT.

The camshaft phaser assembly according to the present invention further includes a control valve 300 disposed separately from the camshaft phaser 100, the control valve 300 being, for example, a cartridge valve of the related art, the control valve 300 being supplied with oil from the oil supply inlet P in the axial direction, a first control flow passage A3, a second control flow passage B3, and a third control flow passage T3 being respectively connected to the first oil passage a, the second oil passage B, and the third oil passage T of the pressure coupling 400 being provided in the cylinder 310 of the control valve 300. The control valve 300 may control the flow of fluid in the first, second and third control flow passages A3, B3 and T3. Thereby, the oil can be supplied from the first oil passage a to the first working chamber, from the second oil passage B to the second working chamber, and from the third oil passage T to the reservoir chamber 102 by the control valve 300 through the first oil passage a, the second oil passage B, and the third oil passage T in the pressure coupling portion 400.

In this embodiment, the first, second, and third oil passages a, B, and T located in the pressure coupling 400 may be connected with the corresponding first, second, and third radial flow passages A1, B1, and T1 in the oil connection 800 at adjacent circumferential positions of the oil connection 800.

(Second embodiment)

As shown in fig. 3A and 3B, the structure of the camshaft phaser assembly according to the second embodiment of the present invention is substantially the same as that of the camshaft phaser assembly according to the first embodiment of the present invention, and the difference in structure between the two includes the manner in which the flow passages A1, A2, B1, B2, T1 are formed.

According to this embodiment, similar to the first embodiment, the first, second, and third oil passages a, B, and T in the pressure coupling 400 are connected with the corresponding first, second, and third radial flow passages A1, B1, and T1 in the oil connecting portion 800 at adjacent circumferential positions of the oil connecting portion 800. Specifically, the second radial flow passage B1 connected to the second oil passage B extends radially within the oil connecting portion 800 up to the depth of the outer wall of the center bolt 700, and is here connected to a second axial flow passage B2 extending in the axial direction X toward the camshaft phaser 100 against the outer wall of the center bolt 700, the second axial flow passage B2 extending until reaching into the camshaft phaser 100 and communicating with the second working chamber of the camshaft phaser 100. The second axial flow passage B2 may be formed between the outer circumferential surface of the center bolt 700 and the inner circumferential surfaces of the rotor 122 and the oil connecting portion 800. The first radial flow passage A1 connected to the first oil passage a extends in a radial hole manner in the oil connecting portion 800 in a radial direction up to a depth spaced apart from the radial outer periphery of the second axial flow passage B2, and is connected thereto to a first axial flow passage A2 extending in the axial direction X toward the camshaft phaser 100, the first axial flow passage A2 extending up to the inside of the camshaft phaser 100 and communicating with the first working chamber of the camshaft phaser 100. Preferably, the radial holes of the first radial flow channel A1 are arranged diametrically opposite to the radial holes of the second radial flow channel B1. Here, the second axial flow passage B2 may be formed to extend in the axial direction X at the oil connecting portion 800 and extend to an end of the oil connecting portion 800 near the camshaft phaser 100. The third radial flow passage T1 connected to the third oil passage T extends from the pressure coupling portion 400 toward the head of the center bolt 700 obliquely (preferably, approximately 10 degrees) with respect to the radial direction in the sectional view within the oil connecting portion 800 until entering the center through hole T2 of the center bolt 700. Here, the configuration of the control valve 300 may be the same as the first embodiment.

(Third embodiment)

As shown in fig. 4A and 4B, the structure of the camshaft phaser assembly according to the third embodiment of the present invention is substantially the same as that of the camshaft phaser assembly according to the second embodiment of the present invention, and the difference in structure between the two includes the connection position of the first oil passage a in the pressure coupling 400 and the first radial flow passage A1 in the oil connection 800.

According to this embodiment, the second and third oil passages B, T in the pressure coupling portion 400 are connected to the second and third radial passages B1, T1 in the oil connecting portion 800 at adjacent positions of the oil connecting portion 800, respectively, while the first oil passage a in the pressure coupling portion 400 is connected to the first radial passage A1 in the oil connecting portion 800 at a position of the oil connecting portion 800 opposite in diameter from the above-described connection position. Here, the configuration of the control valve 300 may be the same as the first embodiment.

(Fourth embodiment)

As shown in fig. 5A and 5B, the camshaft phaser assembly according to the fourth embodiment of the present invention is particularly used for dry belt drive, and its structure is substantially the same as that of the camshaft phaser assembly according to the third embodiment of the present invention, except that the way in which the engine oil introduced from the third oil passage T flows after the center bolt 700, and the seal device 900 provided for dry belt drive are included.

Further, unlike the foregoing embodiment, the housing 101 of the camshaft phaser 100 according to this embodiment is no longer provided with the axial through hole 103, but rather an axial through hole 106 is provided in the front cover 140, which is the side opposite to the housing 101 across the reservoir 102, and a penetrating axial passage communicating with the axial through hole 106 is provided in the rotor 122 and the oil connection 800. The first radial flow path T1 in the oil connection 800 thus extends in the sectional view obliquely (preferably approximately 10 degrees) with respect to the radial direction from the pressure connection 400 toward the head of the center bolt 700 until it enters a center through-hole T2 of the center bolt 700, which center through-hole T2 opens axially along the center bolt 700 into the recess of the locking bolt 600, whereby the flow path thus formed can be further re-introduced into the storage chamber 102 in the radially outward direction, and then exits the camshaft phaser 100 on the side of the oil connection 800 remote from the camshaft phaser 100 via the axial through-hole 106 through the rotor 122 and the axial passage of the oil connection 800, and finally enters the oil tank OT. Here, the configuration of the control valve 300 may be the same as the first embodiment.

On the other hand, the camshaft phaser 100 is engaged with a belt (not shown) through an engagement portion 146 provided radially outside the stator 120. As is well known, oil or other fluid contact with the dry belt may cause slippage, for which purpose a sealing device 900, such as a sealing ring, is provided between the oil connection 800 and the rear cover 142 of the camshaft phaser 100. The sealing device 900 may prevent oil that may leak between the rotor 122 and the rear cover 142 from contacting the belt.

While specific embodiments of the present invention have been described in detail in the foregoing, it should be further noted that:

1. Although only the connection positions of the first oil passage a and the second oil passage B in the pressure coupling 400 and the third oil passage T and the corresponding flow passages in the oil connecting portion 800 are illustrated as being different, it should be understood by those skilled in the art that the positions of the first oil passage a, the second oil passage B, and the third oil passage T into the oil connecting portion 800 may be the same or different from each other.

2. In the camshaft phaser 100 and the oil connection 800 according to the present invention, the extension of the flow passages A1, A2, B1, B2, T1 may be changed according to actual needs, and is not limited to the extension shown in the above embodiments.

3. Although not explicitly illustrated, it will be appreciated by those skilled in the art that the angle at which the third radial flow passage T1 in the oil connection 800 from the pressure coupling 400 to the head of the center bolt 700 is inclined relative to the radial may be selected depending on implementation.

Claims

1. A camshaft phaser assembly, comprising:

Camshaft phaser (100) comprising a stator (120) and a rotor (122) accommodated in the stator (120), a first working chamber and a second working chamber being formed between the stator (120) and the rotor (122), both sides of the first working chamber and the second working chamber in an axial direction (X) of the camshaft phaser (100) being closed by a front cover (140) and a rear cover (142), respectively, the camshaft phaser (100) being provided with a housing (101) on one side in the axial direction;

an oil connection portion (800) formed at one axial end of the camshaft (200);

A center bolt (700), the center bolt (700) connects the other axial side of the camshaft phaser (100) with the oil connection portion (800), characterized in that,

The camshaft phaser assembly further includes:

a pressure coupling (400) mounted to the oil connection (800); and

A control valve (300) provided outside the camshaft phaser (100),

A storage chamber (102) is formed between the front cover (140) and the housing (101),

A first oil way (A), a second oil way (B) and a third oil way (T) are arranged in the pressure connecting part (400), a first radial flow passage (A1), a second radial flow passage (B1) and a third radial flow passage (T1) are arranged in the oil liquid connecting part (800), a first axial flow passage (A2) and a second axial flow passage (B2) are arranged at the rotor (122), the central bolt (700) and the oil liquid connecting part (800), a central through hole (T2) is arranged in the central bolt (700),

The first radial flow passage (A1) is connected with the first oil passage (A) and the first axial flow passage (A2), the first axial flow passage (A2) is communicated with the first working cavity, the second radial flow passage (B1) is connected with the second oil passage (B) and the second axial flow passage (B2), the second axial flow passage (B2) is communicated with the second working cavity, the third radial flow passage (T1) is connected with the third oil passage (T) and the central through hole (T2), the central through hole (T2) is communicated with the storage cavity (102), the storage cavity (102) is used for being connected to an Oil Tank (OT),

The control valve (300) is provided with an oil supply inlet (P) for supplying oil to the control valve (300) and a first control flow passage (A3), a second control flow passage (B3) and a third control flow passage (T3) respectively connected to the first oil passage (A), the second oil passage (B), the third oil passage (T), so that the control valve (300) can supply oil from the first oil passage (A) to the first working chamber, from the second oil passage (B) to the second working chamber, and from the third oil passage (T) to the storage chamber (102),

The camshaft phaser assembly further comprises a locking bolt (600) mounting the housing (101) to a housing (500) of the engine, the locking bolt (600) being provided with a cavity opposite and communicating with a central through hole (T2) of the central bolt (700), the cavity being connected to the storage cavity (102).

2. Camshaft phaser assembly according to claim 1, wherein the housing (101) is provided with an axial through hole (103) close to the locking bolt (600) and a gap (104) is provided between the housing (101) and the housing (500), which gap (104) communicates with the storage chamber (102) through the axial through hole (103).

3. Camshaft phaser assembly according to claim 1, wherein an axial through hole (106) is provided in the front cover (140), and an axial passage communicating with the axial through hole (106) is provided in the rotor (122) and in the oil connection (800), which axial passage communicates with the storage chamber (102) through the axial through hole (106) and is used for guiding oil in the storage chamber (102) to the Oil Tank (OT).

4. A camshaft phaser assembly according to any one of claims 1 to 3, wherein the first oil passage (a), the second oil passage (B), the third oil passage (T) are provided at adjacent circumferential positions of the oil connection (800) and are connected with corresponding first, second, and third radial flow passages (A1, B1, T1) in the oil connection (800).

5. A camshaft phaser assembly according to any one of claims 1 to 3, wherein at least two of the first oil passage (a), the second oil passage (B), the third oil passage (T) are provided at different circumferential positions of the oil connection (800) and are connected with corresponding first radial flow passages (A1), second radial flow passages (B1), third radial flow passages (T1) in the oil connection (800).

6. A camshaft phaser assembly according to any one of claims 1 to 3, further comprising an annular spacer sleeved on a radially outer side of the center bolt (700), the first axial flow passage (A2) being formed between an outer peripheral surface of the center bolt (700) and an inner peripheral surface of the annular spacer, the second axial flow passage (B2) being formed between an outer peripheral surface of the annular spacer and an inner peripheral surface of the rotor (122) and an inner peripheral surface of the oil connection portion (800).

7. A camshaft phaser assembly according to any one of claims 1 to 3, wherein the first axial flow passage (A2) is formed within the oil connection (800), and the second axial flow passage (B2) is formed between an outer circumferential surface of the center bolt (700) and an inner circumferential surface of the rotor (122) and an inner circumferential surface of the oil connection (800).

8. A camshaft phaser assembly according to any one of claims 1 to 3, wherein the third radial flow passage (T1) extends obliquely relative to the radial direction of the oil connection (800) from the pressure coupling (400) towards the head of the central bolt (700) until into a central through bore (T2) of the central bolt (700), the central through bore (T2) of the central bolt (700) extending axially to an axial end of the central bolt (700).

9. A camshaft phaser assembly according to any one of claims 1 to 3, wherein a sealing device (900) is provided between the oil connection (800) and the rear cover (142) of the camshaft phaser (100).