Engine and cam phase regulator thereof
By designing a cam phase regulator for hollow cavity bolt valves and electromagnetic drive components on a small engine, the problem of complex structure and large size of the existing device is solved, and efficient cam phase adjustment on a small engine is achieved, simplifying the structure and improving the response speed.
Patent Information
- Application Number
- CN202422137783.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-09-02
AI Technical Summary
The existing cam phase adjustment device for vehicle engines is complex in structure and large in size, making it difficult to apply to small-sized engines, especially small engines such as motorcycles.
An engine cam phase regulator is designed, using a bolt valve and electromagnetic drive assembly in the hollow cavity. The oil circuit is controlled by axial motion in the bolt valve through the valve core, which simplifies the structure, reduces the space occupied, and avoids long oil circuits. It is suitable for small engines.
Efficient cam phase adjustment on small engines is achieved, reducing the axial and radial space occupation of the device, and improving the response speed and control accuracy.
Smart Images
Figure CN223227412U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engines, in particular to an engine cam phase adjuster and an engine. Background Art
[0002] The engine's cam phase adjuster is a device used to adjust the engine cam phase. It has the following main functions: 1) Provide accurate engine ignition timing so that each cylinder can achieve timely ignition; 2) Adjust valve timing to keep the engine with better combustion efficiency; 3) Improve power performance and fuel economy; 4) Ensure smooth flow of gas in the cylinder combustion chamber and reduce engine vibration and noise.
[0003] The conventional mid-mounted oil-inlet phasers used in existing automobiles are difficult to apply to smaller vehicles due to their large size. Small engines like motorcycles have relatively thin camshafts, making spatial placement difficult. It's difficult to directly replicate automotive phasers for motorcycles. Furthermore, there are very few examples of phasers being used in common motorcycle products on the market. The few applications that exist rely on remotely mounted oil control valves to achieve phase control. However, the control valve and solenoid valve, as a single oil control valve, are located far from the phaser, resulting in a long and complex control oil circuit structure and slow phaser response, resulting in less than ideal results. In short, there is currently a lack of a cam phase adjustment device with good response that can be applied to small engines like motorcycles.
[0004] In summary, the existing cam phase adjustment device for vehicle engines has technical problems such as complex structure and large size, which makes it difficult to apply to small-sized engines. Utility Model Content
[0005] The technical problem to be solved by the utility model is that the existing cam phase adjustment device for vehicle engines has a complex structure and a large volume, and is difficult to be applied to small-sized engines.
[0006] In order to solve the above problems, the present invention provides an engine cam phase adjuster for connecting to the end of the camshaft of the engine, the engine cam phase adjuster includes a phaser stator and a phaser rotor located in the central area of the phaser stator, the phaser rotor includes a bolt valve and a phase control member sleeved on the outer periphery of the bolt valve, the bolt valve central axis area is provided with a hollow rotor center hole, the bolt valve end is threadedly installed with the axial end hole of the camshaft, a valve core that can slide axially in the cavity is provided in the rotor center hole, and the phaser rotor is away from the cam An electromagnetic drive assembly is provided at one end of the shaft for driving the valve core to move axially in the bolt valve; an oil passage connected to the rotor center hole is provided inside the bolt valve, and the shaft end of the bolt valve located in the camshaft and the side surface of its outer shaft are both provided with oil through holes connected to the oil passage, and the rotor center hole is respectively connected to the control oil circuit in the camshaft and the control oil circuit in the phase control component through the oil through holes; the valve core is driven to move axially in the rotor center hole by outputting a feed motion through the electromagnetic drive assembly, so as to drive the oil circuit in the rotor center hole to switch between an open and a closed state, thereby realizing phase adjustment control.
[0007] The novel engine phase adjuster design provided by the present invention optimizes the existing long-stroke control design for motorcycle engines. It does not adopt the oil control valve method, but improves on the basis of the phaser structure currently used in larger automobile engines, so that it can meet the requirements of miniaturization. Specifically, a phaser bolt valve with a hollow inner cavity is provided, and a valve core structure is provided inside the phaser. The valve core can be axially fed in the bolt valve, and a partial shaft section of the bolt valve is inserted into the mounting hole at the end of the camshaft shaft and fixed by threading. It is connected to the control oil circuit in the camshaft through the oil hole at the end of the bolt valve shaft, and the valve is driven by the electromagnetic drive component at the other end of the bolt valve outputting a pressing action. The core moves axially in the center hole of the rotor to control the on-off of the control oil circuit connected to the phase control component through the valve core, thereby achieving the purpose of phase control. This design does not require the use of valve sleeve-related parts in the phase device of traditional automobile engines and the one-way valve group located at the axial end of the phaser, and makes more full use of the axial and radial space of the camshaft. It can greatly reduce the axial and radial space occupied by the phaser while keeping other structures unchanged. It adopts a design similar to that of an automobile engine phaser to avoid the situation where the control oil circuit of a motorcycle phaser is too long, and effectively solves the technical problem that the existing cam phase adjustment device for vehicle engines has a complex structure and large volume, and is difficult to apply to small-sized engines.
[0008] As a preferred solution, the valve core is in the form of a hollow shaft with an open end and an internal oil hole extending through it on its outer circumference. A valve core support is provided between the open end of the valve core and the shaft section within the bolt valve that provides the oil passage. The end shape of the valve core support matches the shape of the open end of the valve core in a concave-convex manner, used to close the passage within the valve core. This design optimizes the structural design of the valve core. Its main body is a hollow shaft with an oil hole extending through it at one end. An internal oil hole is also provided on its lateral outer edge. A valve core support that matches the shape of the valve core port is provided within the inner oil chamber. This structure can seal the oil passage through the valve core at a preset axial position, enabling complete switching of the oil passage between two states.
[0009] As a preferred solution, a return spring is installed in the rotor's center hole. Its two ends respectively abut against the valve core support and the opening of the oil passage in the bolt valve, maintaining the valve core support and the valve core in a closed position. This design is another optimization of the above structure. Because the linear motion output by the solenoid valve is only used to push the valve core and cannot normally reset the valve core, a return spring that can return the valve core is provided to ensure continuous and repeated phase adjustment.
[0010] As a preferred solution, the phase control element is annular and circumferentially positioned with the outer axial surface of the bolt valve. An oil through-hole is provided on its inner edge, connecting to an oil through-hole on the outer periphery of the bolt valve. This oil through-hole connects to an internal control oil circuit, driving the phase control element to engage or disengage with the phaser stator under oil pressure. This design improves upon the phase control element design in the aforementioned structure. Its annular body houses an internal control oil circuit, which connects to the oil through-hole on the valve core through the oil through-hole, thereby smoothly achieving phase adjustment of the working position.
[0011] As a preferred solution, a one-way oil inlet passage is provided between the outer axial surface of the bolt valve and the inner edge of the camshaft's end hole. The end surface of the phase control member facing the camshaft is provided with an oil through-hole connected to the one-way oil inlet passage. This oil through-hole communicates with the control oil circuit within the phase control member via the oil inlet one-way valve. This structure, in addition to the control oil circuit within the bolt valve, also provides an oil through-hole on the inner edge of the camshaft end hole, which communicates with the oil circuit within the phase space.
[0012] As a preferred solution, the control oil circuit within the phase control element includes a first radially distributed oil circuit, the ends of which connect to oil holes on the inner and outer surfaces of the phase control element, respectively. A spherical push block is located within the oil hole on the outer surface of the phase control element, which is used to push and engage the clutch plate on the inner edge of the phase shifter stator. This design optimizes the oil circuit distribution within the phase control element. One radially distributed circuit connects from the inner edge of the phase control element to the outer periphery and contains a spherical push block. When the oil pressure in the first oil circuit increases, the push block is pushed outward, engaging the clutch plate on the inner edge of the phase shifter stator at the outer edge of the phase control element, thereby connecting and positioning the rotor and stator.
[0013] As a preferred solution, the control oil circuit within the phase control element also includes a second oil circuit distributed along an oblique direction. The ends of the second oil circuit respectively connect to the middle portion of the first oil circuit and the oil through-holes on the end surface of the phase control element. The oil inlet check valve is located at the connection point between the first and second oil circuits. Based on the above oil circuit layout, the control oil circuit also includes a connected second oil circuit, and the oil inlet check valve is located within the second oil circuit.
[0014] As a preferred solution, a filter structure for filtering oil is installed in the control oil circuit of the phase control component. This design integrates the oil filtration structure into the oil circuit of the phase control component, avoiding the external filter taking up too much space in the phaser.
[0015] As a preferred solution, the side end surface of the phase control element is also equipped with a hydraulic self-locking mechanism. This hydraulic self-locking mechanism is fed by the hydraulic pressure output from the control oil circuit. This hydraulic self-locking mechanism engages with the concave and convex locking grooves on the corresponding side surfaces of the phaser stator to completely lock the circumferential relative position of the phaser rotor and phaser stator. This design provides an additional locking structure design based on the phaser clutch control, which can more stably fix the phaser rotor and phaser stator in the circumferential direction.
[0016] The present invention also provides an engine comprising a housing, a power assembly and the above-mentioned engine cam phase adjuster. Since the above-mentioned engine cam phase adjuster has the above-mentioned beneficial effects, an engine equipped with the engine cam phase adjuster should also have corresponding beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the overall external structure of an engine cam phase adjuster provided by the utility model;
[0018] Figure 2 for Figure 1 Schematic diagram of the partial cross-sectional structure of the engine cam phase adjuster.
[0019] in, Figure 1 、 Figure 2 middle:
[0020] 1. Phaser stator; 2. Camshaft; 3. Electromagnetic drive assembly; 4. Bolt valve; 5. Phase control element; 6. Valve core; 7. Rotor center hole; 8. Valve core support; 9. Return spring; 10. Oil channel; 11. First oil circuit; 12. Ball push block; 13. Clutch plate; 14. Oil inlet check valve; 15. Second oil circuit; 16. One-way oil inlet circuit. DETAILED DESCRIPTION
[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.
[0022] Before explaining the working principle of the present invention in detail, the description of the present invention needs to be further explained: In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "two ends," "one end," "the other end," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection, a direct connection, an indirect connection via an intermediate medium, or a connection between two components by welding. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model in specific circumstances.
[0024] refer to Figure 1 、 Figure 2 The following embodiments are described Figure 1 This is a schematic diagram of the overall external structure of an engine cam phase adjuster provided by the utility model; Figure 2 for Figure 1 Schematic diagram of the partial cross-sectional structure of the engine cam phase adjuster.
[0025] The engine cam phase adjuster provided in this embodiment is used to be connected to the end of the camshaft 2 of the engine. The engine cam phase adjuster includes a phaser stator 1 and a phaser rotor located in the central area of the phaser stator 1. The phaser rotor includes a bolt valve 4 and a phase control member 5 sleeved on the outer periphery of the bolt valve 4. A hollow rotor center hole 7 is provided in the central axis area of the bolt valve 4. The end of the bolt valve 4 is threadedly installed with the axial end hole of the camshaft 2. A valve core 6 that can slide axially in the cavity is provided in the rotor center hole 7. The phaser rotor is provided at the end away from the camshaft 2. An electromagnetic drive component 3 is provided for driving the valve core 6 to move axially in the bolt valve 4; an oil passage 10 connected to the rotor center hole 7 is provided inside the bolt valve 4, and the shaft end of the bolt valve 4 located in the camshaft 2 and the outer shaft side thereof are both provided with oil through holes connected to the oil passage 10, and the rotor center hole 7 is respectively connected to the control oil circuit in the camshaft 2 and the control oil circuit in the phase control component 5 through the oil through holes; the electromagnetic drive component 3 outputs a feed motion to drive the valve core 6 to move axially in the rotor center hole 7, so as to drive the oil circuit in the rotor center hole 7 to switch between the open and closed states, thereby realizing phase adjustment control.
[0026] The novel engine phase adjuster design provided by the present invention optimizes the existing long-stroke control design for motorcycle engines. It does not adopt the oil control valve method, but improves on the basis of the phaser structure currently used in larger automobile engines, so that it can meet the requirements of miniaturization. Specifically, a phaser bolt valve 4 with a hollow inner cavity is provided, and a valve core 6 is provided inside the phaser. The valve core 6 can be axially fed in the bolt valve 4, and a partial shaft section of the bolt valve 4 is inserted into the mounting hole at the shaft end of the camshaft 2 and is fixed by threading. It is connected to the control oil circuit in the camshaft 2 through the oil hole at the shaft end of the bolt valve 4, and the pressing action is output by the electromagnetic drive component 3 at the other end of the bolt valve 4. The movable valve core 6 moves axially in the rotor center hole 7 to control the on-off of the control oil circuit connected to the phase control component 5 through the valve core 6, thereby achieving the purpose of phase control. This design does not require the use of valve sleeve-related parts in the phase device of a traditional automobile engine and the one-way valve group located at the axial end of the phaser, and makes more full use of the axial and radial space of the camshaft 2. It can greatly reduce the axial and radial space occupied by the phaser while other structures remain unchanged. It also adopts a design similar to that of an automobile engine phaser to avoid the situation where the control oil circuit of a motorcycle phaser is too long, effectively solving the technical problem that the existing cam phase adjustment device for vehicle engines has a complex structure and large volume, and is difficult to apply to small-sized engines.
[0027] In the technical solution provided by this embodiment, the valve core 6 is in the shape of a hollow shaft with an open end, and an internal oil hole is provided on its outer circumference. A valve core support 8 is provided between the open end of the valve core 6 and the shaft section in which the oil passage 10 is provided in the bolt valve 4. The end shape of the valve core support 8 matches the shape of the open end of the valve core 6 in a concave-convex manner, and is used to close the passage in the valve core 6. This design optimizes the structural design of the valve core 6. Its main body is in the shape of a hollow shaft with an oil hole passing through one end. An internal oil hole is also provided on its lateral outer edge. A valve core support 8 that matches the shape of the port of the valve core 6 is provided in the inner oil cavity. Through this structure, the oil path through the valve core 6 can be closed at a preset axial position, and the oil path in the two states can be completely switched. In addition, it should be noted that the valve core support 8 can also be formed in a manner that is completely fixed to the valve core 6 by means of press-fitting or other methods.
[0028] In the technical solution provided by this embodiment, a return spring 9 is installed within the rotor's central hole 7. Its two ends respectively abut against the valve core support 8 and the opening of the oil passage 10 within the bolt valve 4, maintaining the closed contact between the valve core support 8 and the valve core 6. This design is another optimization of the above-mentioned structure. Because the linear motion output by the solenoid valve is only used to push the valve core 6 and cannot normally reset the valve core 6, a return spring 9 is provided to return the valve core 6 to its original position to ensure continuous and repeated phase adjustment.
[0029] In the technical solution provided by this embodiment, the phase control element 5 is annular and circumferentially positioned with the outer axial surface of the bolt valve 4. An oil through-hole is provided on the inner edge of the phase control element 5, connecting to the oil through-holes on the outer periphery of the bolt valve 4. This oil through-hole connects to the internal control oil circuit, driving the phase control element 5 to engage and disengage with the phaser stator 1 under the influence of oil pressure. This design improves on the design of the phase control element 5 in the above-mentioned structure. Its annular body contains an internal control oil circuit, which connects to the oil through-holes on the valve core 6 through the oil through-hole, thus smoothly achieving phase adjustment of the working state.
[0030] In the technical solution provided by this embodiment, a one-way oil inlet passage 16 is provided between the outer axial surface of the bolt valve 4 and the inner edge of the axial end hole of the camshaft 2. The end surface of the phase control member 5 facing the camshaft 2 is provided with an oil through-hole connected to the one-way oil inlet passage 16. This oil through-hole communicates with the control oil circuit within the phase control member 5 via the oil inlet one-way valve 14. In addition to the control oil circuit within the bolt valve 4, an oil through-hole is provided on the inner edge of the end hole of the camshaft 2, and through this structure, it communicates with the oil circuit within the phase space structure.
[0031] In the technical solution provided in this embodiment, the control oil circuit within the phase control element 5 includes a radially distributed first oil circuit 11. The two ends of the first oil circuit 11 connect to oil holes on the inner and outer surfaces of the phase control element 5, respectively. A spherical pusher block 12 is disposed within the oil hole on the outer surface of the phase control element 5. This spherical pusher block 12 is used to push against a clutch plate 13 on the inner surface of the phase shifter stator 1. This design optimizes the oil circuit distribution within the phase control element 5. One of the channels is radially distributed, connecting from the inner edge of the phase control element 5 to the outer periphery. A spherical pusher block 12 is disposed within this channel. When the oil pressure within the first oil circuit 11 increases, the pusher block is pushed outward, engaging with a clutch plate 13 on the inner edge of the phase shifter stator 1 on the outer edge of the phase control element 5, thereby aligning the rotor and stator.
[0032] In the technical solution provided in this embodiment, the control oil circuit within the phase control element 5 also includes a second oil circuit 15 distributed along an oblique axis. The two ends of the second oil circuit 15 connect to the middle of the first oil circuit 11 and the oil through-hole on the end face of the phase control element 5, respectively. An oil inlet check valve 14 is located at the connection point between the first and second oil circuits 11 and 15. Based on the above oil circuit layout, the control oil circuit also includes a connected second oil circuit 15, with the oil inlet check valve 14 located within the second oil circuit 15. It should be noted that the first and second oil circuits 11 and 15 are interconnected and are essentially different locations of the same oil circuit. This oil circuit is the oil supply circuit, while the oil circuit located at the rear of the bolt valve 4, connected to the center hole, is used for oil removal. During normal oil pressure control operation, oil flows sequentially through the first and second oil circuits 15 into the position of the valve core 6. Under the action of the electromagnetic drive assembly 3, the valve core 6 can axially move and switch oil circuits, connecting the oil circuits to oil reservoirs at different locations before and after the bolt valve 4. These different oil reservoirs connect to different oil chambers in the phase control element 5, achieving phase control.
[0033] In the technical solution provided by this embodiment, a filter structure for filtering oil is installed in the control oil circuit of the phase control element 5. This design integrates the oil filtration structure into the oil circuit of the phase control element 5, avoiding the need for an external filter to occupy too much space in the phaser.
[0034] In the technical solution provided by this embodiment, a hydraulic self-locking mechanism is also provided on the side end surface of the phase control element 5. This hydraulic self-locking mechanism is fed by the hydraulic pressure output from the control oil circuit. This hydraulic self-locking mechanism engages with the concave and convex locking grooves on the corresponding side surfaces of the phaser stator 1 to completely lock the circumferential relative position of the phaser rotor and phaser stator 1. This design, in addition to the phaser clutch control, provides an additional locking mechanism, further ensuring stable circumferential fixation between the phaser rotor and phaser stator 1.
[0035] The present invention also provides an engine including a housing, a power assembly and the above-mentioned engine cam phase adjuster. Since the engine cam phase adjuster in the above-mentioned embodiment has the above-mentioned beneficial effects, the engine equipped with the engine cam phase adjuster should also have corresponding beneficial effects.
[0036] Although the disclosure is as described above, the scope of protection of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of protection of the utility model.
Claims
1. An engine cam phase adjuster, used for connecting to the end of a camshaft (2) of an engine, the engine cam phase adjuster comprising a phaser stator (1) and a phaser rotor located in the central area of the phaser stator (1), characterized in that: The phaser rotor comprises a bolt valve (4) and a phase control member (5) sleeved on the outer periphery of the bolt valve (4); a hollow rotor center hole (7) is provided in the central axis area of the bolt valve (4); the end of the bolt valve (4) is threadedly mounted with the shaft end hole of the camshaft (2); a valve core (6) that can slide axially in the cavity is provided in the rotor center hole (7); an electromagnetic drive assembly (3) is provided at the end of the phaser rotor away from the camshaft (2) for driving the valve core (6) to move axially in the bolt valve (4); the bolt valve (4) is provided inside. An oil passage (10) is provided in communication with the rotor center hole (7); an oil through hole in communication with the oil passage (10) is provided on the shaft end of the bolt valve (4) located in the camshaft (2) and the side surface of the outer shaft thereof; the rotor center hole (7) is connected to the control oil circuit in the camshaft (2) and the control oil circuit in the phase control member (5) through the oil through holes; the valve core (6) is driven to move axially in the rotor center hole (7) by outputting a feed motion through the electromagnetic drive component (3), so as to drive the oil circuit in the rotor center hole (7) to switch between an open and closed state, thereby realizing phase adjustment control.
2. The engine cam phase adjuster according to claim 1, characterized in that: The valve core (6) is in the shape of a hollow shaft with one end open, and a through inner oil hole is provided on its outer peripheral surface. A valve core support (8) is provided between the open end of the valve core (6) and the shaft section in which the oil passage (10) is provided in the bolt valve (4). The end shape of the valve core support (8) is matched with the shape of the open end of the valve core (6) in a concave-convex manner, and is used to close the passage in the valve core (6).
3. The engine cam phase adjuster according to claim 2, characterized in that: A return spring (9) is provided in the rotor center hole (7), and the two ends of the return spring (9) respectively abut against the opening positions of the valve core support (8) and the oil passage (10) in the bolt valve (4), so as to keep the valve core support (8) and the valve core (6) abutted against each other and closed.
4. The engine cam phase adjuster according to claim 3, characterized in that: The phase control member (5) is annular and is positioned and matched with the outer axial surface of the bolt valve (4) in the circumferential direction. The inner edge of the phase control member (5) is provided with an oil through hole connected to the oil through hole on the outer periphery of the bolt valve (4). The oil through hole is connected to the internal control oil circuit. Under the drive of oil pressure, the phase control member (5) and the phaser stator (1) are engaged or disengaged.
5. The engine cam phase adjuster according to claim 4, characterized in that: A one-way oil inlet passage (16) is provided between the outer axial surface of the bolt valve (4) and the inner edge surface of the shaft end hole of the camshaft (2); an oil through hole communicating with the one-way oil inlet passage (16) is provided on the end surface of the phase control component (5) facing the camshaft (2); and the oil through hole is communicated with the control oil passage in the phase control component (5) through the oil inlet one-way valve (14).
6. The engine cam phase adjuster according to claim 5, characterized in that: The control oil circuit in the phase control component (5) includes a first oil circuit (11) distributed in the radial direction, wherein the two ends of the first oil circuit (11) are respectively connected to the oil through holes on the inner edge surface and the outer peripheral surface of the phase control component (5), and a spherical push block (12) is provided in the oil through hole on the outer peripheral surface of the phase control component (5), and the spherical push block (12) is used to push and cooperate with the clutch plate (13) on the inner edge surface of the phaser stator (1).
7. The engine cam phase adjuster according to claim 5, characterized in that: The control oil circuit in the phase control member (5) further comprises a second oil circuit (15) distributed in an oblique direction, wherein the two ends of the second oil circuit (15) are respectively connected to the middle portion of the first oil circuit (11) and the oil through hole on the end face of the phase control member (5), and the oil inlet one-way valve (14) is located at the connecting position between the first oil circuit (11) and the second oil circuit (15).
8. The engine cam phase adjuster according to claim 5, characterized in that: A filter structure for filtering oil is provided in the control oil circuit of the phase control component (5).
9. The engine cam phase adjuster according to claim 5, characterized in that: The side end surface of the phase control member (5) is also provided with an oil pressure self-locking mechanism, which is fed by the oil pressure output by the control oil circuit. The oil pressure self-locking mechanism is locked with the locking grooves on the corresponding side surfaces of the phaser stator (1) to completely lock the circumferential relative positions of the phaser rotor and the phaser stator (1).
10. An engine comprising a housing, a power assembly and a phase assembly, characterized in that: The phase assembly is an engine cam phase adjuster as described in any one of claims 1-9.