swing axle

Abstract

A swing arm for a rocker assembly is provided. The swing arm is configured to be selectively actuated by a first rocker or a second rocker and straddles a first valve and a second valve. The swing arm includes a rocker body including a through-hole and an aperture intersecting the through-hole, and a swing mechanism configured to be connected between the first rocker and the first valve. The swing mechanism includes a swing pin configured to swing in the through-hole, and a rotation cylinder configured to support the swing pin and rotate in the aperture. In particular, the swing arm is angularly swingable when actuated by the first rocker to actuate the first valve without actuating the second valve, and is actuatable to actuate both the first valve and the second valve when actuated by the second rocker.

Description

[0001] Cross-references to related applications

[0002] This disclosure is based on and claims the benefit of U.S. Provisional Application No. 63 / 394,999, filed August 4, 2022, entitled “Swing bridge”, and U.S. Provisional Application No. 63 / 387,025, filed December 12, 2022, entitled “Swing bridge with hydraulic capsule in dedicated rocker arm for engine brake”, the entire contents of each of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates generally to valve system systems, and more specifically to a swing arm for use with a rocker arm assembly. Background Technology

[0004] Various valve system designs for use with internal combustion engines have been produced in the past for the purpose of controlling valve actuation (such as for main exhaust events). Typically, in a typical valve mechanism, a rocker arm system is connected to the camshaft on one side via the valve crossarm and to multiple engine valves on the other side via the valve crossarm, for synchronously delivering actuation motion from the camshaft to the downstream valves. In some scenarios, in addition to the main lift event, it may be desirable to provide auxiliary functions, such as compression engine braking, allowing for independent control of selected valves. To achieve this, a switchable system is typically employed, capable of selectively translating between a retracted position and an extended position. The retracted position prevents actuation of the associated valve via a corresponding dedicated rocker arm, while the extended position allows valve actuation. Correspondingly, the valve crossarm may also be equipped with a motion transmission mechanism for independently actuating the selected valve without affecting other valves. However, current designs typically utilize sliding components that move up and down within the valve crossarm, which introduces force balance issues and occupies a relatively large package space.

[0005] Therefore, there is a need for a solution that not only requires less space but also provides improved system dynamics. Summary of the Invention

[0006] This disclosure discloses a swing arm for use with a rocker arm assembly, the swing arm being capable of swinging as needed to actuate at least one selected valve separate from all valves, thereby achieving an auxiliary valve function. By employing a swing mechanism that transfers motion from the rocker arm to the associated valve while simultaneously moving relative to the swing arm, the system disclosed herein achieves better force and / or motion transmission, reduces undesirable wear in various valve mechanism components, and improves the dynamic performance of the entire assembly. Furthermore, embodiments according to this disclosure offer packaging advantages and lower space requirements.

[0007] In one embodiment, a swing arm for a rocker arm assembly is provided. The swing arm is configured to be selectively actuated by a first rocker arm or a second rocker arm and to span a first valve and a second valve. Specifically, the swing arm includes an arm body and a swing mechanism. The arm body includes a through-hole and an orifice intersecting the through-hole. The swing mechanism is configured to connect between the first rocker arm and the first valve. The swing mechanism includes a swing pin configured to swing within the through-hole, and a rotating cylinder configured to support the swing pin and rotate within the orifice. Furthermore, the swing arm is further configured to swing at an angle when actuated by the first rocker arm, so as to actuate the first valve without actuating the second valve, and to actuate both the first valve and the second valve when actuated by the second rocker arm.

[0008] In the specific implementation plan, the through hole is arranged in a vertical direction.

[0009] In a specific implementation, the orifice is arranged perpendicular to the through hole.

[0010] In a specific implementation, the rotary cylinder is axially fixed by the swing pin.

[0011] In a specific implementation, the long axis of the rotary cylinder is perpendicular to the long axis of the swing pin.

[0012] In a specific implementation, a gap is defined between the swing pin and the through hole to allow the swing pin to swing within the through hole.

[0013] In the specific implementation plan, the swing pin is structurally roughly cylindrical.

[0014] In a specific embodiment, the swing mechanism further includes a first valve seat for contacting at least a portion of the first valve, and the crossarm body includes a second valve seat for contacting at least a portion of the second valve.

[0015] In a specific embodiment, the swing mechanism further includes a first contact area for contacting the first rocker arm, and the cross arm body includes a second contact area for contacting the second rocker arm.

[0016] In a specific implementation, the first contact area is located on the top surface of the swing pin.

[0017] In one embodiment, a swing arm for a rocker arm assembly is provided. The swing arm is configured to be selectively actuated by a first rocker arm or a second rocker arm and to span a first valve and a second valve. Specifically, the swing arm includes an arm body and a swing mechanism. The arm body includes a through-hole and an orifice intersecting the through-hole. The swing mechanism is configured to connect between the first rocker arm and the first valve. The swing mechanism includes a swing pin and a rotary cylinder. The swing pin is configured to swing within the through-hole and includes an insert at its lower end. The rotary cylinder is configured to rotate within the orifice and includes a slot on its upper surface for engaging the insert. Furthermore, the swing arm is further configured to swing at an angle when actuated by the first rocker arm, so as to actuate the first valve without actuating the second valve, and to actuate both the first and second valves when actuated by the second rocker arm.

[0018] In a specific embodiment, the rotary cylinder further includes a valve seat located on the lower surface of the rotary cylinder for contacting at least a portion of the first valve.

[0019] In a specific embodiment, the oscillating pin is axially engaged with the rotary cylinder via the insert and the slot.

[0020] In a specific implementation, the long axis of the rotary cylinder is perpendicular to the long axis of the swing pin.

[0021] In a specific implementation, a gap is defined between the swing pin and the through hole to allow the swing pin to swing within the through hole.

[0022] In one embodiment, a swing arm for a rocker arm assembly is provided. The swing arm is configured to be selectively actuated by a first rocker arm or a second rocker arm and to span a first valve and a second valve. Specifically, the swing arm includes an arm body and a swing mechanism. The arm body includes a through-hole and an orifice intersecting the through-hole. The swing mechanism is configured to connect between the first rocker arm and the first valve. The swing mechanism includes a swing pin and a rotary cylinder. The swing pin is configured to swing in the through-hole and includes a through-hole extending perpendicular to the long axis of the swing pin. The rotary cylinder is configured to be rotatably fitted into the orifice and the through-hole. Furthermore, the swing arm is further configured to swing at an angle when actuated by the first rocker arm, so as to actuate the first valve without actuating the second valve, and to actuate both the first valve and the second valve when actuated by the second rocker arm.

[0023] In the specific implementation plan, the through hole is positioned to be aligned with the opening.

[0024] In a specific implementation, the rotary cylinder extends through the orifice and the through hole to axially support the swing pin relative to the crossarm body.

[0025] In a specific implementation, the sway pin further includes a valve seat located at the lower end of the sway pin for contacting at least a portion of the first valve.

[0026] In a specific implementation, a gap is defined between the swing pin and the through hole to allow the swing pin to swing within the through hole. Attached Figure Description

[0027] Embodiments according to this disclosure will now be described with reference to the accompanying drawings, in which:

[0028] Figure 1 A rocker arm assembly including a swinging cross arm according to the present disclosure is shown;

[0029] Figure 2 It shows Figure 1 A partial cross-sectional view of the rocker arm assembly;

[0030] Figure 3 A cross-sectional view of the hydraulic chamber according to this disclosure is shown;

[0031] Figure 4 It shows Figure 1 Independent view of the swing arm;

[0032] Figures 5 to 6 Two exploded views of the swing arm taken from different angles are shown;

[0033] Figure 7 A schematic cross-section of the swing arm is shown;

[0034] Figure 8 The swing arm in drive mode is shown;

[0035] Figure 9 The swing arm in auxiliary mode is shown;

[0036] Figure 10 Another embodiment of the swing arm according to this disclosure is shown;

[0037] Figure 11 It shows Figure 10 Exploded view of the swing arm;

[0038] Figure 12 It shows Figure 10 A cross-sectional view of the swing arm;

[0039] Figure 13Another embodiment of the swing arm according to this disclosure is shown;

[0040] Figure 14 It shows Figure 13 An exploded view of the swing arm; and

[0041] Figure 15 It shows Figure 13 A cross-sectional view of the swing arm. Detailed Implementation

[0042] Reference will now be made in detail to the examples shown in the accompanying drawings. Throughout the drawings, the same reference numerals will be used to denote the same or similar parts whenever possible. Orientation references such as “up,” “down,” “right,” and “left” are for ease of reference to the drawings and are not intended to limit the scope of this disclosure.

[0043] Figures 1 to 2 An exemplary rocker arm assembly 100 with a swing crossarm 102 according to one embodiment of the present disclosure is shown. In the illustrated embodiment, the rocker arm assembly 100 typically includes a primary rocker arm 104, such as a main exhaust rocker arm, and a secondary or auxiliary rocker arm 106, such as an engine brake rocker arm. The primary rocker arm 104 and the secondary rocker arm 106 may cooperate (e.g., under a control strategy or method) to selectively actuate a first engine valve 108 and a second engine valve 110 via a swing crossarm 102 connected between the rocker arms 104, 106 and engine valves 108, 110. More specifically, for example, the first engine valve 108 may be actuated separately from the second engine valve 110, such that the first engine valve 108 operates on a lift profile associated with the secondary rocker arm 106, while the second engine valve 110 operates on a different lift profile associated with the primary rocker arm 104, details of which will be understood from the discussion below.

[0044] While specific embodiments of this disclosure may be described in the context of rocker arms used to operate exhaust valves in engine braking systems, such as in 1.5- or 2-stroke compression braking, those skilled in the art will understand that this disclosure is not limited to such applications. Various embodiments of this disclosure are equally or similarly applicable to other types of systems in valve mechanism assemblies. For example, embodiments of this disclosure may be used in conjunction with intake rocker arm systems, extended valve closing systems, advanced valve opening systems, or other suitable valve mechanism systems familiar to those skilled in the art.

[0045] Continue to refer to Figures 1 to 2In a specific embodiment, the main rocker arm 104 may be pivotally supported by a rocker arm shaft (not shown) extending through the central opening 112, such that the main rocker arm 104 can rotate about the rocker arm shaft based on the cam lift profile of the main lift cam 114. Specifically, the cam end 116 of the main rocker arm 104 may contact or otherwise engage with the main lift cam 114 to receive valve actuation motion. The valve end 118 opposite the cam end 116 may then be configured to engage the swing arm 102 when the main rocker arm 104 rotates, so as to transfer motion from the main lift cam 114 to both engine valves 108 and 110 engaged with the swing arm 102. Similarly, in a specific embodiment, a secondary rocker arm 106, for example, which may be arranged parallel to the main rocker arm 104, may also be rotatably supported by a camshaft. As shown, the secondary rocker arm 106 may include a cam end 122 for receiving valve actuation motion from a secondary lift cam 120 (e.g., an engine brake lift cam) and a valve end 124 opposite the cam end 122 and configured to selectively engage the swing arm 102 as needed by a swing mechanism 126. In a specific embodiment, the swing mechanism 126 may be configured to transmit actuation motion from the secondary rocker arm 106 to one engine valve—e.g., a first engine valve 108 associated with engine braking—while allowing the swing arm 102 to swing at an angle to avoid actuation of another engine valve (e.g., a second engine valve 110). Reference will be made below. Figures 4 to 6 A more comprehensive description of the details of the swing mechanism 126 and the swing arm 102.

[0046] In a specific implementation, it may be desirable to configure the secondary rocker arm 106 to be selectively switchable, allowing selection of whether the secondary lift cam 120 can actuate the associated engine valve 108. That is, the secondary rocker arm 106 can switch between a primary mode (i.e., valve end 124 is spaced apart from the contact with the swing arm 102, so the associated engine valve 108 remains unacted regardless of the rotation of the secondary rocker arm 106) and an auxiliary mode (i.e., when the secondary rocker arm 106 reciprocates, valve end 124 engages the swing arm 102 via the swing mechanism 126, thereby allowing motion to be delivered to the engine valve 108). For this purpose, a hydraulic chamber 128 may be provided at the valve end 124 of the secondary rocker arm 106. The hydraulic chamber 128 may be hydraulically controlled by pressurized fluid supplied via a fluid circuit that passes through the secondary rocker arm 106 and is configured to move between a retracted position and an extended position. In a specific implementation, for example, the hydraulic chamber 128 may be received by a vertical orifice disposed in the valve end 124 of the auxiliary rocker arm 106. During operation, the hydraulic chamber 128 may be actuated as needed to protrude outward from the bottom of the valve end 124 to contact the swing mechanism 126 or retract into the valve end 124 to avoid contact with the swing mechanism 126.

[0047] Figure 3 A more detailed separate cross-sectional view of the hydraulic chamber 128 is shown, particularly showing the hydraulic chamber 128 in its retracted state. In a specific embodiment, the hydraulic chamber 128 may include a housing 304, which is generally cylindrical in shape and may include an upper chamber 306 and a lower chamber 308. In the example shown, the upper chamber 306 and the lower chamber 308 may together form a single body defining a housing 304 for accommodating and / or containing various components of the hydraulic chamber 128 in series. For example, the upper chamber 306 may accommodate a pin 310, while the lower chamber 308 may accommodate a check valve assembly 312 and a plunger 314, each aligned along the chamber axis 302.

[0048] like Figure 3 As shown, the upper chamber 306 may be equipped with one or more fluid passages 316, which may be arranged circumferentially on the sidewall of the upper chamber 306 and configured to receive hydraulic fluid (e.g., oil) supplied via the auxiliary rocker arm 106. The lower chamber 308 may be positioned below the upper chamber 306 and configured to be in fluid communication with the upper chamber 306 via an opening 318 disposed between the upper chamber 306 and the lower chamber 308. In this way, pressurized fluid introduced into the upper chamber 306 through the fluid passages 316 may be allowed to enter the lower chamber 308 via the opening 318—for example, selectively under the control of the check valve assembly 312, the details of which will be explained more clearly below.

[0049] like Figure 3As further shown, the upper chamber 306 may include a pin 310. The pin 310 may be hydraulically controlled by fluid pressure introduced into the upper chamber 306 to compress and / or extend vertically along the chamber axis 302. For example, in the depicted configuration, a spring 320 may be coupled to the tip of the pin 310 and configured to bias the pin 310 downwards to its extended position. As fluid flows in and hydraulic pressure accumulates within the upper chamber 306, the hydraulic pressure overcomes the downward biasing force exerted by the spring 320, thus pushing the pin 310 into a retracted state in an upward direction. In a specific embodiment, a check valve assembly 312 located downstream of the pin 310 may be configured to selectively enable fluid communication between the upper chamber 306 and the lower chamber 308 based on the movement of the pin 310. The check valve assembly 312 may be arranged in the lower chamber 308 directly below the opening 318. In the embodiment shown, the check valve assembly 312 includes a check ball 322 that can be pressed down by a pin 310 to open a fluid passage through an opening 318. During operation, the check ball 322 can typically sit against the opening 318, for example, by means of a valve spring 324 pushing the check ball 322 upward. In this way, when biased, the check ball 322 can become a one-way valve that allows fluid to flow downward to the lower chamber 308, but prevents it from flowing back in the opposite direction to the upper chamber 306. When the pin 310 moves to its extended position, the lower end of the pin 310 can protrude into the opening 318 and push the check ball 322, thereby disengaging the check ball 322 from the opening 318 and allowing fluid to flow through the check ball 322 into the lower chamber 308, or vice versa.

[0050] Continue to refer to Figure 3 The lower chamber 308 may further accommodate a plunger 314. For example, the plunger 314 may be positioned below and aligned with the check valve assembly 312. In a specific embodiment, the plunger 314 is configured to translate a distance within the lower chamber 308 (e.g., vertically along the chamber axis 302) between an extended position and a retracted position when actuated by fluid introduced into the lower chamber 308. For example, when the lower chamber 308 is filled with pressurized fluid, the plunger 314 may be hydraulically actuated downwards to a position where the lower end of the plunger 314 extends from the bottom of the hydraulic chamber 128. In this case, when the secondary rocker arm 106 rotates, the plunger 314 may contact the swing arm 102, thereby enabling motion to be transmitted to the downstream engine valve 108. In a specific embodiment, a spring 326 may be coupled to the plunger 314, for example, near the lower end of the plunger 314. For example, the spring seat 328 may be configured to support the spring 326 upwards, which is attached or fixed to the end of the lower chamber 308. Figure 3As indicated by the arrow, spring 326 provides an upward spring force to plunger 314, allowing plunger 314 to return to its retracted state when fluid pressure is removed. In this retracted configuration, most or all of plunger 314 is contained within the lower chamber 308 in such a way that it inhibits contact with the swing arm 102 even when the secondary rocker arm 106 rotates, thus deactivating engine valve 108 as needed. In other words, by constructing the hydraulic chamber 128 in this way, a variable volume is formed that expands when pressurized fluid reaches the lower chamber 308 through check valve assembly 312 and pushes plunger 314 downward, and contracts when check valve assembly 312 opens to release fluid out of the lower chamber 308, thereby switching the hydraulic chamber 128 between an extended and retracted state.

[0051] The design of the hydraulic chamber 128 disclosed herein contrasts with existing designs because, when decommissioning is required, the plunger 314 is maintained at default compression by the spring 326, thereby preventing any contact between the hydraulic chamber 128 and the swing arm 102. This protects the system from unwanted wear, reduces the risk of damage to moving parts, and helps maintain proper system dynamics.

[0052] Although depicted and described in this particular manner, those skilled in the art will understand that the rocker arm assembly disclosed herein is provided for illustrative purposes only and is not intended to limit the scope of this disclosure. Other suitable configurations are also contemplated in this disclosure. For example, certain embodiments of this disclosure may include only some (if not all) of the above-described structures without departing from the scope of this disclosure. Alternatively, other additional features, as well as those familiar in the art, may be optionally provided and will not be described in exhaustive detail herein.

[0053] Figure 4 An isometric view of a swing arm 102 with a swing mechanism 126 according to the present disclosure is shown, and Figures 5 to 6Various exploded views of the swing arm 102 taken from different angles are shown. In specific embodiments, the swing arm 102 may be configured to span and be positioned over engine valves 108 and 110. For example, and not in a limiting manner, in the depicted embodiments, the body 400 of the swing arm 102 may include a first valve side 402 operatively coupled to the end of engine valve 110, and a second valve side 404 generally opposite the engine brake valve side 402 and operatively coupled to the end of engine valve 108. For example, in some embodiments, the second valve side 404 may have a valve seat 602 at its bottom, which may rest on and receive the top of engine valve 110. Although depicted as a circular recess, the valve seat 602 may take the form of various shapes, such as elliptical, elongated, circular, or other suitable shapes familiar to those skilled in the art. Furthermore, the top surface of the body 400 may be provided with a contact area 406, which may be positioned near the center of the body 400 in a position vertically aligned with the valve end 118 of the main rocker arm 104. During operation, when the main rocker arm 104 is depressed, the contact area 406 may engage the valve end 118 to transfer movement downstream (i.e., in the direction of force transmission), thereby actuating both engine valves 108 and 110. For example, the contact area 406 may be substantially flat to better maintain contact and ensure proper movement and / or force delivery. Of course, other suitable surface structures, such as curved or concave surface areas, are also contemplated in this disclosure for performing the desired motion transmission function.

[0054] Continue to refer to Figures 4 to 6 In a specific embodiment, a sway mechanism 126 may be provided at the first valve side 402 to engage or contact, for example, an engine valve 108 associated with engine braking. The sway mechanism 126 typically includes a sway pin 502 and a rotary cylinder 504 supporting the sway pin 502 (e.g., vertically upward as shown). For example, and not limitingly, in the embodiment shown, the long axis 510 of the sway pin 502 may be arranged perpendicular to the long axis 512 of the rotary cylinder 504. To accommodate the sway pin 502 and the rotary cylinder 504 respectively, the first valve side 402 may be correspondingly configured with, for example, a through-hole 506 extending vertically within the body 400 and an orifice 508 horizontally intersecting the through-hole 506. Specifically, in a specific embodiment, the length of the rotary cylinder 504 (e.g., measured along the long axis 512) may be substantially equal to the length of the orifice 508, such that upon insertion, the rotary cylinder 504 engages with at least a portion of the body 400. With this configuration, during assembly of the illustrated embodiment, the rotary cylinder 504 can first be fitted into the orifice 508 such that its long axis 512 is aligned with the central axis of the orifice 508. Subsequently, the sway pin 502 can be inserted into the through hole 506 to abut against and engage the rotary cylinder 504.

[0055] As further shown, in this example embodiment, the oscillating pin 502 may be generally cylindrical in structure. However, other suitable configurations (such as elongated shapes) are also contemplated for performing the desired functions of this disclosure. In a specific embodiment, the oscillating pin 502 may include a contact surface at its upper end for contacting the hydraulic chamber 128 to receive actuated motion therefrom. Furthermore, the oscillating pin 502 may also include an insert 514 (e.g., in a protruding form) extending from its lower end for engagement with the rotary cylinder 504. Thus, the upper surface of the rotary cylinder 504 may be provided with a recess or slot 516 shaped to mate with the insert 514 and / or the lower end of the oscillating pin 502, such that the insert 514 and / or the lower end can be tightly fitted into the slot 516 to axially secure the rotary cylinder 504. In addition or alternatively, other suitable connection or mating structures or methods (such as snap-fit, interference fit, etc.) may be employed to properly secure the oscillating pin 502 and the rotary cylinder 504 together. Constructed in this way, the rotary cylinder 504 can maintain a firm engagement with the swing pin 502 while providing support for the swing pin 502.

[0056] In the embodiment shown, the lower surface of the rotary cylinder 504 may be configured with a valve seat 604 that maintains terminal contact with the engine valve 108 throughout system operation. For example, and not limitingly, the valve seat 604 may include a substantially flat area resting on the top of the valve tip to ensure proper contact with the engine valve 108, thereby transmitting actuating movement to the engine valve 108 as needed. Alternatively or otherwise, although not shown, optional retaining features such as clamps may be provided at the valve seat 604 to provide an additional degree of retention. Of course, other suitable surface structures familiar to those skilled in the art (such as curved surface areas) are also contemplated in this disclosure for performing the intended function of engaging engine valves.

[0057] Figure 7 A cross-section of the swing arm 102, taken along the longitudinal axis, is schematically depicted. As can be clearly observed in the figure, a gap 700 can be defined between the swing pin 502 and the through hole 506, specifically between the outer wall of the swing pin 502 and the inner side of the through hole 506. In other words, the through hole 506 can be sized such that its width 702 is relatively larger than the outer diameter or width 704 of the swing pin 502. In this way, space redundancy is allowed to accommodate the swinging motion of the swing pin 502 within the through hole 506.

[0058] Reference Figures 8 to 9 Explaining the operation of the swing arm 102 according to this disclosure, wherein Figure 8The swing arm 102 is shown in drive mode, i.e., during the main lift event of the main rocker arm 104, while Figure 9 The swing arm 102 in an auxiliary mode is shown, such as in engine braking mode, where the auxiliary rocker arm 106 is activated to selectively engage with the swing arm 102 as needed.

[0059] refer to Figure 8 The cross-sectional view on the left is taken from the front of the valve crossarm 102, while the cross-sectional view on the right is taken from the first valve side 402 of the valve crossarm 102. In the drive mode, the main rocker arm 104 can rock (e.g., in response to the main lift profile) and act on the rocker arm 102 by pressing the contact area 406 located in the middle of the rocker arm 102, thereby pushing the rocker arm 102 vertically downward (as indicated by the arrow in the figure) to simultaneously drive both engine valves 108 and 110 to open. For example, engine valves 108 and 110 can move to the same valve position synchronously with each other. Furthermore, during this process, the horizontal axis of the rocker arm 102 can remain substantially perpendicular to the axis of both engine valves 108 and 110.

[0060] Additionally, when in drive mode, the secondary rocker arm 106 may be located on the base circle or deactivated. Alternatively or otherwise, the hydraulic chamber 128 may be retracted to suppress contact with the swing arm 102 even when the secondary rocker arm 106 rotates such that the swing arm 102 (specifically, the swing mechanism 126) receives zero actuation motion from the secondary rocker arm 106.

[0061] refer to Figure 9The cross-sectional view on the left is taken from the front of the valve lift 102, while the cross-sectional view on the right is taken from the first valve side 402 of the valve lift 102. In the auxiliary mode, the main rocker arm 104 can be located on the base circle or deactivated, while the secondary rocker arm 106 can rotate according to the lift profile of the secondary lift cam 120. Furthermore, the hydraulic chamber 128 is controlled to extend such that the plunger 314 can be actuated by the swing mechanism 126 (as indicated by the arrow in the figure) to move the engine valve 110 independently of the engine valve 108. That is, regardless of the movement of the second rocker arm 104, the engine valve 110 remains unacted. During this auxiliary valve lift event, the long axis 510 of the swing pin 502 can be kept parallel to or aligned with the axis of the engine valve 108 by means of the relative rotation of the rotary cylinder 504 within the orifice 508. Simultaneously, the swing arm 102 can tilt—for example, pivot slightly downwards at an angle about the second valve side 404—even though the swing pin 502 and the valve shaft of the engine valve 108 are in a parallel position. As already explained, a clearance 700 may be provided to allow the swing arm 102 to move relative to the swing pin 502. Optionally, in a specific embodiment, the valve seat 602 may be further dimensioned to be deep enough to accommodate such swinging or tilting of the swing arm 102, thereby ensuring proper contact with the engine valve 110 throughout operation.

[0062] Figures 10 to 12 Another configuration of the swing arm 1002 according to this disclosure is shown, which is similar in result to the swing arm 102 described above, as it includes a body 1004 having a first valve side 1006 associated with engine valve 110, a second valve side 1008 opposite to the first valve side 1006 and associated with engine valve 108, and a swing mechanism 1010 located at the first valve side 1006. In a specific embodiment, the swing mechanism 1010 may have a swing pin 1102 and a rotary cylinder 1104 supporting the swing pin 1102 (e.g., vertically upward as shown in the figure). For example, and not limitingly, in the embodiment shown, the major axis 1106 of the swing pin 1102 may be arranged perpendicular to the major axis 1108 of the rotary cylinder 1104. In order to accommodate the swing pin 1102 and the rotary cylinder 1104 respectively, the first valve side 1006 may be correspondingly constructed with, for example, a through hole 1110 that can extend vertically inside the main body 1004 and an orifice 1112 that can intersect the through hole 1110 horizontally.

[0063] In the embodiment shown, the sway pin 1102 may be elongated and include a through hole 1114 extending perpendicular to the long axis 1106 and configured to rotatably receive the rotary cylinder 1104. In this configuration, during assembly, the sway pin 1102 may first be inserted into the through hole 1110 until the through hole 1114 aligns with the orifice 1112. Subsequently, the rotary cylinder 1104 may be fitted into the orifice 1112 and through the through hole 1114 to support the sway pin 1102 relative to the body 1004.

[0064] Additionally, as further shown, the sway pin 1102 may also include a contact surface 1116 at its upper end for contacting the hydraulic chamber 128 to receive actuated motion. For example, and not in a limiting manner, the contact surface 1116 may be formed as a platform extending upward from the upper end of the sway pin 1102. Alternatively, other possible surface structures may be provided as needed for transmitting motion. In the embodiment shown, the sway pin 1102 further includes a valve seat 1202 disposed at its lower end. For example, the valve seat 1202 may be a circular recess or other suitable structure for engaging the end of the engine valve 108 in a motion-transmitting manner. Similarly, the second valve side 1008 may include a valve seat 1204 configured as an elongated pouch or slit to rest on top of the end of the engine valve 110 and remain in contact throughout operation. Although described in this manner, it should be understood that valve seats 1202 and / or 1204 may be configured differently for engagement with engine valves.

[0065] Figures 13 to 15 Another configuration of the swing arm 1302 according to this disclosure is shown. The swing arm 1302 is generally similar to the swing arm 102, except that it further includes an optional valve cover 1402. In a specific embodiment, the valve cover 1402 may be removably received by a valve seat 1404 disposed on the lower surface of the rotary cylinder 1406 and configured to cover the area around the end of the engine valve 108. In this configuration, for example, the valve seat 1404 may be sized to have a greater depth so as to at least partially contain the valve cover 1402. This ensures proper engagement with the engine valve 108 while preventing accidental disengagement. Furthermore, the swing arm 1302 can be adapted to various valve sizes without any significant modifications.

[0066] The various embodiments of this disclosure advantageously provide better packaging and, due to their more compact structure, require less space. Furthermore, the embodiments disclosed herein facilitate better control of motion and / or force transmission, as well as overall system dynamics. It will also be understood that, in light of the accompanying drawings, description, and claims of this disclosure, one or more other advantages may readily become apparent to those skilled in the art.

[0067] In this document, "or" is inclusive rather than exclusive, unless otherwise explicitly stated or indicated by the context. Therefore, in this document, "A or B" means "A, B, or both," unless otherwise explicitly stated or indicated by the context. Furthermore, "and" is both joint and individual, unless otherwise explicitly stated or indicated by the context. Therefore, in this document, "A and B" means "A and B, jointly or individually," unless otherwise explicitly stated or indicated by the context.

[0068] The scope of this disclosure covers all changes, substitutions, variations, alterations, and modifications to the exemplary embodiments described or illustrated herein that will be understood by those skilled in the art. The scope of this disclosure is not limited to the exemplary embodiments described or illustrated herein. Furthermore, although this disclosure describes and illustrates corresponding embodiments herein as including specific components, elements, features, functions, operations, or steps, any of these embodiments may include any combination or substitution of any of the components, elements, features, functions, operations, or steps described or illustrated anywhere herein that will be understood by those skilled in the art. Additionally, references in the appended claims to a means or system adapted, arranged, capable, constructed, enabled, operable, or operated to perform a particular function include that means, system, or component, whether or not it or the particular function is activated, turned on, or unlocked, provided that the means, system, or component is so adapted, arranged, capable, constructed, enabled, operable, or operated. Furthermore, although this disclosure describes or illustrates specific embodiments to provide particular advantages, specific embodiments may not provide these advantages, provide some or all of these advantages.

Claims

1. A swing arm for a rocker arm assembly, the swing arm being configured to be selectively actuated by a first rocker arm or a second rocker arm and spanning a first valve and a second valve, the swing arm comprising: A crossarm body, the crossarm body including a through hole and an opening intersecting the through hole; and A sway mechanism, configured to connect between the first rocker arm and the first valve, includes... A sway pin, configured to oscillate within the through hole, and A rotary cylinder configured to support the swing pin and rotate within the orifice; The swing arm is further configured as follows: When actuated by the first rocker arm, it oscillates at an angle so as to actuate the first valve without actuating the second valve; as well as When actuated by the second rocker arm, both the first valve and the second valve are actuated.

2. The swing arm according to claim 1, wherein the through hole is arranged in the vertical direction.

3. The swing arm according to claim 1, wherein the orifice is arranged perpendicular to the through hole.

4. The swing arm according to claim 1, wherein the rotating cylinder is axially fixed by the swing pin.

5. The swing arm according to claim 1, wherein the long axis of the rotating cylinder is perpendicular to the long axis of the swing pin.

6. The swing arm of claim 1, wherein a gap is defined between the swing pin and the through hole to allow the swing pin to swing within the through hole.

7. The swing arm according to claim 1, wherein the swing pin is generally cylindrical in structure.

8. The swing arm of claim 1, wherein the swing mechanism further includes a first valve seat for contacting at least a portion of the first valve, and the arm body includes a second valve seat for contacting at least a portion of the second valve.

9. The swing arm of claim 1, wherein the swing mechanism further includes a first contact area for contacting the first rocker arm, and the arm body includes a second contact area for contacting the second rocker arm.

10. The swing arm according to claim 9, wherein the first contact area is located on the top surface of the swing pin.

11. A swing arm for a rocker arm assembly, the swing arm being configured to be selectively actuated by a first rocker arm or a second rocker arm and spanning a first valve and a second valve, the swing arm comprising: A crossarm body, the crossarm body including a through hole and an opening intersecting the through hole; and A sway mechanism, configured to connect between the first rocker arm and the first valve, includes... A pivot pin, configured to pivot within the through-hole and including an insert at the lower end of the pivot pin, and A rotary cylinder, configured to rotate within the orifice and including a slot on its upper surface for engaging with the insert. The swing arm is further configured as follows: When actuated by the first rocker arm, it oscillates at an angle so as to actuate the first valve without actuating the second valve; as well as When actuated by the second rocker arm, both the first valve and the second valve are actuated.

12. The swing arm of claim 11, wherein the rotary cylinder further includes a valve seat located on the lower surface of the rotary cylinder for contacting at least a portion of the first valve.

13. The swing arm of claim 11, wherein the swing pin is axially engaged with the rotary cylinder via the insert and the slot.

14. The swing arm according to claim 11, wherein the long axis of the rotating cylinder is perpendicular to the long axis of the swing pin.

15. The swing arm of claim 11, wherein a gap is defined between the swing pin and the through hole to allow the swing pin to swing within the through hole.

16. A swing arm for a rocker arm assembly, the swing arm being configured to be selectively actuated by a first rocker arm or a second rocker arm and spanning a first valve and a second valve, the swing arm comprising: A crossarm body, the crossarm body including a through hole and an opening intersecting the through hole; and A sway mechanism, configured to connect between the first rocker arm and the first valve, includes... A pivot pin, configured to pivot within the through hole and including a through hole extending perpendicular to the long axis of the pivot pin, and A rotary cylinder, configured to be rotatably fitted into the orifice and the through hole. The swing arm is further configured as follows: When actuated by the first rocker arm, it oscillates at an angle so as to actuate the first valve without actuating the second valve; as well as When actuated by the second rocker arm, both the first valve and the second valve are actuated.

17. The swing arm of claim 16, wherein the through hole is positioned to align with the opening.

18. The swing arm of claim 16, wherein the rotary cylinder extends through the orifice and the through hole to axially support the swing pin relative to the arm body.

19. The swing arm of claim 16, wherein the swing pin further comprises a valve seat located at the lower end of the swing pin for contacting at least a portion of the first valve.

20. The swing arm of claim 16, wherein a gap is defined between the swing pin and the through hole to allow the swing pin to swing within the through hole.

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