Vortex generating air inlet for internal combustion engine

Abstract

An internal combustion engine includes a cylinder head configured to create a vortex in a charge flow introduced into a combustion chamber. The cylinder head includes a first port for receiving a first portion of the charge flow. The first port is configured to provide the first portion of the charge flow to a combustion chamber of the internal combustion engine. The cylinder head includes a second port for receiving a second portion of the charge flow, and a vortex passage connecting an upstream portion of the second port to a downstream portion of the first port.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of the filing date of U.S. Provisional Application Serial No. 63 / 378,400, filed on October 5, 2023, which is incorporated herein by reference. Technical Field

[0003] The present invention relates to internal combustion engines and, more particularly, to an air intake configured to generate a swirl in a combustion chamber of an internal combustion engine. Background Art

[0004] The cylinder head of the internal combustion engine may include two intake valve openings leading to the combustion chamber, the two intake valve openings being opened and closed by a first intake valve and a second intake valve, respectively. The valve openings are connected to respective ones of the first intake port and the second intake port, which distribute the charge flow from the intake manifold to the respective intake valve openings.

[0005] Swirl of the charge flow in the combustion chamber is desirable to aid in mixing with the fuel and provide proper and complete combustion. To create swirl in the combustion chamber, one of the intake ports may include a swirl inducing configuration. However, such a configuration typically induces pumping losses, so the amount of beneficial swirl that can be produced is offset by the pumping losses required to produce the desired flow through the intake port. Therefore, further improvements are desired in this area of ​​technology. Summary of the invention

[0006] Disclosed herein are systems and apparatus relating to an internal combustion engine having an air intake configured to generate a swirl in a combustion chamber.

[0007] In one embodiment, an internal combustion engine comprises at least one cylinder, and the at least one cylinder comprises a combustion chamber. A cylinder head is configured to provide a charge flow to the combustion chamber. The cylinder head comprises a first port connected to a first outlet. The first port is configured to introduce a charge flow into the combustion chamber through the first outlet. The cylinder head comprises a second port connected to a second outlet. The second port is configured to introduce a charge flow into the combustion chamber through the second outlet. A swirl channel connects an upstream portion of the second port to a downstream portion of the first port. The swirl channel is configured to generate a swirl in the charge flow introduced into the combustion chamber through the first outlet, wherein the charge flow is turned from the second port to the first port through the swirl channel.

[0008] In one embodiment, a cylinder head for distributing a charge flow to an internal combustion engine is provided. The cylinder head includes a first port for receiving a first portion of a charge flow. The first port is configured to provide the first portion of the charge flow to a combustion chamber of the internal combustion engine. The cylinder head includes a second port for receiving a second portion of the charge flow. The cylinder head includes a swirl channel that connects an upstream portion of the second port to a downstream portion of the first port. The swirl channel is configured to divert a portion of the second portion of the charge flow from the second port to the first port to generate a swirl in the charge flow in the combustion chamber, while the remainder of the second portion of the charge flow is provided to the combustion chamber through the second port.

[0009] This summary is provided to introduce some concepts further described below in illustrative embodiments. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as ancillary content to limit the scope of the claimed subject matter. Additional embodiments, forms, objects, features, advantages, aspects and benefits will become apparent from the following description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of an internal combustion engine according to one embodiment of the present disclosure.

[0011] Figure 2 It passes through Figure 1 0026] A cross-sectional view of a cylinder of an internal combustion engine showing an intake port arrangement in a cylinder head according to an embodiment of the present disclosure.

[0012] Figure 3 yes Figure 1 A partial cross-sectional view of a cylinder head and intake manifold of an internal combustion engine showing an intake port arrangement along the cylinder head according to one embodiment of the present disclosure.

[0013] Figure 4 is along Figure 3 A front view of the cylinder head of line 4-4.

[0014] Figure 5 yes Figure 3 Front view of the air intake arrangement of the cylinder.

[0015] Figure 6 yes Figure 3 Plan view of the cylinder intake arrangement.

[0016] Figure 7 yes Figure 3 Schematic diagram of the air intake arrangement.

[0017] Figure 8 is a schematic diagram showing a cylinder port configuration in a cylinder head according to an embodiment of the present disclosure.

[0018] Fig. 9 is a schematic diagram showing another embodiment of a cylinder port configuration in a cylinder head according to the present disclosure. DETAILED DESCRIPTION

[0019] In order to promote an understanding of the principles of the present invention, reference will now be made to the embodiments shown in the drawings and specific language will be used to describe the embodiments. It will be understood, however, that no limitation of the scope of the present invention is intended, and any changes and further modifications in the illustrated embodiments that would normally occur to a person skilled in the art to which the present invention relates, as well as any further applications of the principles of the present invention shown herein, are contemplated herein.

[0020] Figures 1 to 9 Various aspects of an internal combustion engine 10 are shown. The internal combustion engine 10 includes at least one cylinder 12 and a cylinder head 30. The cylinder head 30 includes a combustion chamber 14. The cylinder head 30 is configured to provide a charge flow 20 to the combustion chamber 14. The cylinder head 30 includes a first port 32 connected to a first outlet 34 of the first port 32, and a second port 36 connected to a second outlet 38 of the second port 36. The first port 32 is configured to introduce the charge flow 20 into the combustion chamber 14 through the first outlet 34, and the second port 36 is configured to introduce the charge flow 20 into the combustion chamber 14 through the second outlet 38. A swirl passage 40 connects an upstream portion 46 of the second port 36 to a downstream portion 44 of the first port 32. The swirl passage 40 is configured to generate a swirl in the charge flow 20 introduced into the combustion chamber 14 through the first outlet 34, wherein the charge flow 20 is diverted from the second port 36 to the first port 32 through the swirl passage 40.

[0021] A cylinder head 30 for distributing a charge flow 20 within an internal combustion engine 10 is also disclosed. The cylinder head 30 includes a first port 32 for receiving a first portion of the charge flow 20. The first port 32 is configured to provide the first portion of the charge flow 20 to a combustion chamber 14 of the internal combustion engine 10. The cylinder head 30 includes a second port 36 for receiving a second portion of the charge flow 20. The cylinder head 30 includes a swirl passage 40 that connects an upstream portion 46 of the second port 36 to a downstream portion 44 of the first port 32. The swirl passage 40 is configured to divert a portion of the second portion of the charge flow 20 from the second port 36 to the first port 32 to generate a swirl in the charge flow 20 in the combustion chamber 14, while the remainder of the second portion of the charge flow 20 is provided to the combustion chamber 14 through the second port 36.

[0022] refer to Figure 1 to Figure 2, the internal combustion engine 10 includes a plurality of cylinders 12. Each of the cylinders 12 includes a combustion chamber 14. The internal combustion engine 10 also includes an intake port 16 and an exhaust port 18 connected to each combustion chamber 14 of the cylinder 12. The intake port 16 provides a charge flow 20 to the combustion chamber 14, and the exhaust port 18 provides a path for the exhaust flow 22 to be discharged from the combustion chamber 14.

[0023] The engine 10 also includes a cylinder head 30 extending along one or more of the cylinders 12. The intake port 16 includes an intake manifold 26 connected to the cylinder head 30. The intake manifold 26 distributes the charge flow 20 to the combustion chambers 14 through a plurality of intake ports of the cylinder head 30, as discussed further below. The exhaust manifold 28 collects the exhaust gas output from the combustion in the combustion chamber 14 of each of the cylinders 12 and provides the exhaust gas flow 22 to the exhaust port 18.

[0024] The engine 10 may be any type of engine, and in one specific embodiment is an internal combustion engine that burns any suitable fuel and includes a plurality of cylinders 12, each housing a piston 24. In the illustrated embodiment, the engine 10 includes six cylinders connected to an intake manifold 26 and an exhaust manifold 28 via a cylinder head 30. However, any number of cylinders 12 that can be used with the engine 10 is contemplated. The engine 10 may be an inline type engine with a single cylinder bank as shown in the illustrated embodiment, or other configurations including a V-shaped cylinder arrangement, a W-type engine, or any engine arrangement with one or more cylinders 12. It is contemplated that the engine 10 is provided as part of a powertrain system for a vehicle (not shown), but other applications, such as for generator sets and marine applications, are also contemplated and not excluded.

[0025] Further references Figure 3 to Figure 4 , further details of the cylinder head 30 according to an embodiment of the present disclosure are shown. In the illustrated embodiment, the cylinder head 30 is a unitary body having a plurality of first ports 32, each of which is paired with a corresponding one of a plurality of second ports 36. The pairs of first ports 32 and second ports 36 are flow-connected to corresponding cylinders of the plurality of cylinders 12 to provide the charge flow 20 to the combustion chamber 14. In addition, each pair of first ports 32 and second ports 36 is connected to a corresponding one of a plurality of swirl channels 40.

[0026] The first port 32, the second port 36, and / or the swirl passage 40 may be formed in the cylinder head 30 by casting, drilling, machining, or other forming techniques. The cylinder head 30 may be comprised of a single, unitary body sized to extend along all of the cylinders 12 of the engine 10, or may be divided into two or more sections that span one or more of the cylinders 12. Additionally, the cylinder head 30 may include other features not shown in the illustrated embodiment, such as passages, bores, and other ports for injectors, sensors, fasteners, and the like.

[0027] Each of the first ports 32 includes a corresponding first outlet 34, and each of the second ports 36 includes a corresponding second outlet 38. When the intake valves 60, 62 are lifted from their corresponding valve seats 64, 66, the first outlets 34 and the second outlets 38 allow the charge flow 20 to enter the corresponding cylinder 12. For example, each cylinder 12 includes two intake valves 60, 62, which are opened and closed by a valve opening mechanism (not shown) via a camshaft (not shown). The opening of the valves 60, 62 allows the charge flow 20 to enter the combustion chamber 14 of the corresponding cylinder 12 through the outlets 34, 38.

[0028] The cylinder head 30 also includes a flange 70 extending along one side of the cylinder head 30 for connecting the intake manifold 26. The flange 70 defines a flow channel 72 along the length of the cylinder head 30. The flow channel 72 interconnects the first port 32 and the second port 36 to distribute the charge flow 20 between the connected cylinders 12o. The flange 70 may also include a plurality of protrusions 74 projecting outwardly therefrom for receiving fasteners to secure the intake manifold 26 thereto.

[0029] Further references Figures 5 to 7 , the first port 32 includes an upstream portion 42 extending from a first inlet 52 and a downstream portion 44 extending from a first outlet 34. The upstream portion 42 is connected to the downstream portion 44 by a first elbow 54, such that the first outlet 34 is located in a plane oriented transversely to the plane of the first inlet 52. The second port 36 includes an upstream portion 46 extending from a second inlet 56 and a downstream portion 48 extending from the second outlet 38. The upstream portion 46 is connected to the downstream portion 48 by a second elbow 58, such that the second outlet 38 is located in a plane oriented transversely to the plane of the second inlet 52.

[0030] The swirl passage 40 connects the high-pressure upstream portion 46 of the second port 36 to the low-pressure downstream portion 44 of the first port 32. As a result, any portion of the charge flow diverted from the second port 36 into the swirl passage 40 travels from the second port 36 to the first port 32 and then enters the combustion chamber 14 through the first outlet 34 along with the charge flow 20 that enters the first port 32 via the first inlet 52. The remainder of the charge flow in the second port 36 enters the combustion chamber 14 through the second outlet 38.

[0031] In one embodiment, the first outlet 34 and the second outlet 38 are located in a common plane, and the first inlet 52 and the second inlet 56 are located in a common plane. In one embodiment, the first outlet 34 and the second outlet 38 are located in a plane that is orthogonal to the plane in which the first inlet 52 and the second inlet 56 are located. Other embodiments contemplate other configurations and orientations between the inlets and outlets of the first port 32 and the second port 36. For example, the first outlet 34 and the second outlet 38 can be located in a plane that is oblique or parallel to the plane in which the first inlet 52 and the second inlet 56 are located. In other embodiments, the first inlet 52 and the second inlet 56 and / or the first outlet 34 and the second outlet 38 are not coplanar.

[0032] In one embodiment, the second port 37 includes a shield 80 that partially blocks the outlet formed by the second outlet 38 into the combustion chamber 14. The shield 80 causes more of the charge flow 20 to enter the combustion chamber 14 from the first port 32 rather than the second port 36. Thus, the shield 80 may include a swirl-inducing feature or configuration that imparts some swirl characteristics to the portion of the charge flow 20 that enters the combustion chamber 14 through the second outlet 38, as indicated by arrow 82.

[0033] In one embodiment, shield 80 is located on the side of second port 36 opposite to the vortex flow direction. As a result, a portion of the inflation flow 20 entering through second outlet 38 is directed more toward the side of second outlet 38 adjacent first port 32. In addition, a portion of the inflation flow 20 diverted through vortex passage 40 directs the inflation flow entering through first aperture 34 to flow in the vortex flow direction indicated by arrow 84.

[0034] In addition, the shield 80 diverts a portion of the portion of the charge flow 20 entering the second port 36 through the second inlet 56 to enter the swirl passage 40. The diverted portion of the charge flow 20 enters the first port 32 from the swirl passage 40 at its downstream portion 44 (proximate the first outlet 34 and / or the valve seat 64). This diverted portion of the charge flow 20 induces a larger swirl in the charge flow in the combustion chamber 14 entering through the first outlet 34, as shown by arrows 84, without significant pumping losses.

[0035] The shield 80 can be any structure that partially blocks the second outlet 38 of the second port 36. In some embodiments, the shield 80 includes one or more vortex-inducing features. In some embodiments, the shield 80 is one or more of a plate, a deflector, a block, a protrusion, a ramp, a spiral, a lip, or other devices or configurations that partially block or prevent the inflation flow 20 from passing through the second outlet 38 of the second port 36. The shield 80 can be cast with the second port 32 or installed in the second port 32 as a separate device. In addition, the shield 80 can be located on the second port 36 so that a portion of the inflation flow entering through the second outlet 38 is deflected in the same vortex direction as the inflation flow entering through the first outlet 34. In one embodiment, the shield 80 can be located on the side of the second port 36 opposite the first port 32.

[0036] In one embodiment, the size of the first port 32 tapers from the flow channel 72 and / or the first inlet 52 toward the first outlet 34 and the combustion chamber 14. The size of the second port 36 also tapers from the flow channel 72 and / or the second inlet 56 toward the second outlet 38 and the combustion chamber 14. Other embodiments contemplate uniformly sized and / or non-tapered first and second ports 32 and 36. As used herein, size may include cross-sectional area, diameter, circumference, and / or outer circumference. Additionally or alternatively, the first port 32 and the second port 36 converge toward each other in a direction away from the flow channel 72 toward the first and second outlets 34 and 38 and / or the combustion chamber 14.

[0037] In one embodiment, the swirl passage 40 is uniform in size from the second port 36 to the first port 32. Other embodiments contemplate non-uniformly sized and / or tapered swirl passages 40. In one embodiment, the swirl passage 40 is inclined in a direction toward the combustion chamber 14 from a first position at an upstream portion 46 of the second port 36 to a second position at a downstream portion 44 of the first port 32. The inclined swirl passage 40 may be inclined in a direction toward the combustion chamber 14 from the first position to the second position.

[0038] refer to Figures 8 to 9 , shows an example of the configuration of the intake and exhaust ports at the interface with the cylinder 12. For example, in Figure 8 1 and 2 are shown in FIG. 1 . The first and second outlets 34 and 38 on the intake side and the first and second inlets 94 and 98 on the exhaust side are shown. The outlets 34, 38 and inlets 94, 98 are arranged in a square pattern on opposite sides of the centerline 100 of the cylinder 12. The intake ports 32, 36 may be the same or substantially the same length as the intake manifold 26, and the exhaust ports 92, 96 may be the same or substantially the same length as the exhaust manifold 28.

[0039] exist Fig. 9In the embodiment of the present invention, the first outlet 34' and the second outlet 38' and the third inlet 94' and the fourth inlet 98' are arranged in a diamond pattern. In this configuration, the first outlet 34' and the exhaust inlet 98' are opposite each other on the centerline 100, and the second outlet 38' and the exhaust inlet 94' are opposite each other on opposite sides of the centerline 100. Therefore, the first outlet 34' is farther from the intake manifold 26 than the second outlet 38', and the exhaust inlet 98' is farther from the exhaust manifold 28 than the exhaust inlet 94'. Although Fig. 9 The diamond-shaped structure of FIG. 4 is capable of generating a vortex flow in the second port 36 ′ having vortex inducing characteristics without a shield, but the vortex passage 40 can be used to enhance or increase the amount of vortex generated.

[0040] Many aspects of the present disclosure are contemplated. For example, one aspect relates to an internal combustion engine comprising: at least one cylinder, the at least one cylinder comprising a combustion chamber; and a cylinder head, the cylinder head being configured to provide a charge flow to the combustion chamber. The cylinder head comprises a first port connected to a first outlet of the first port and a second port connected to a second outlet of the second port. The first port is configured to introduce a charge flow into the combustion chamber through the first outlet, and the second port is configured to introduce a charge flow into the combustion chamber through the second outlet. The cylinder head comprises a swirl channel, the swirl channel connecting an upstream portion of the second port to a downstream portion of the first port. The swirl channel is configured to generate a swirl in the charge flow introduced into the combustion chamber through the first outlet, wherein a portion of the charge flow is diverted from the second port to the first port through the swirl channel.

[0041] In one embodiment, the second port includes a shield that blocks the second port to deflect the inflation flow in the second port through the vortex channel. In a refinement of this embodiment, the first port is located on a first side of the second port, and the shield is located on the second port so that the inflation flow entering through the second port is deflected in the same vortex direction as the inflation flow entering through the first port.

[0042] In one embodiment, the first port and the second port taper toward the first outlet and the second outlet, respectively. In one embodiment, the upstream portion of the second port is a region of higher pressure than the downstream portion of the first port.

[0043] In one embodiment, the swirl passage extends from the second port to a location adjacent to a valve seat in the first port. In a refinement of this embodiment, the swirl passage comprises a uniform diameter from the second port to the first port.

[0044] In one embodiment, the internal combustion engine includes an exhaust port. The exhaust port includes a third port having a first inlet and a fourth port having a second inlet. The third port is configured to receive an exhaust flow from the combustion chamber through the first inlet, and the fourth port is configured to receive an exhaust flow from the combustion chamber through the second inlet. In an improvement of this embodiment, the first outlet and the second outlet and the first inlet and the second inlet are arranged on the cylinder in a square pattern. In another improvement, the first outlet and the second outlet and the first inlet and the second inlet are arranged on the cylinder in a diamond pattern.

[0045] According to another aspect of the present disclosure, a cylinder head for distributing a charge flow in an internal combustion engine is provided. The cylinder head includes a first port for receiving a first portion of the charge flow and a second port for receiving a second portion of the charge flow. The first port is configured to provide the first portion of the charge flow to a combustion chamber of the internal combustion engine. The cylinder head includes a swirl channel that connects an upstream portion of the second port to a downstream portion of the first port. The swirl channel is configured to divert a portion of the second portion of the charge flow from the second port to the first port to generate a swirl in the charge flow in the combustion chamber, while the remainder of the second portion of the charge flow is provided to the combustion chamber through the second port.

[0046] In one embodiment, the cylinder head includes a plurality of first ports associated with a plurality of combustion chambers, and a plurality of second ports associated with the plurality of combustion chambers. In a refinement of this embodiment, the first ports and the second ports converge toward each other. In another refinement, the first ports and the second ports taper in size toward the combustion chambers.

[0047] In one embodiment, the first port includes an upstream portion, and the downstream portion is connected to the upstream portion by a first elbow. The upstream portion of the first port includes a first inlet, and the downstream portion of the first port includes a first outlet oriented transverse to the first inlet of the first port. The second port includes a downstream portion, and the upstream portion is connected to the downstream portion by a second elbow. The upstream portion of the second port includes a second inlet, and the downstream portion of the second port includes a second outlet oriented transverse to the second inlet of the second port. In a modification of this embodiment, the vortex channel is inclined from a first position near the second inlet to a second position near the first outlet.

[0048] In one embodiment, the second port includes a shield that partially blocks the second port to divert charge flow from the second port into the vortex passage. In a refinement of this embodiment, the shield is configured to induce a vortex in a remainder of the second portion of the charge flow provided to the combustion chamber through the second outlet.

[0049] In one embodiment, the cylinder head includes a first intake valve extending into the first port and a second intake valve extending into the second port. In one embodiment, a size of the swirl passage is uniform from the second port to the first port.

[0050] Although the present invention has been shown and described in detail in the drawings and in the foregoing description, these should be considered illustrative rather than restrictive in nature, and it should be understood that only certain exemplary embodiments have been shown and described. It should be understood by those skilled in the art that many modifications can be made in the exemplary embodiments without actually departing from the present invention. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined by the appended claims. Reading the claims, it is intended that when words such as "one", "a kind", "at least one" or "at least a portion" are used, it is not intended to limit the claims to only one item, unless there is a clear statement to the contrary in the claims. When the language "at least a portion" and / or "a portion" is used, the item may include a portion and / or the entire item, unless a statement to the contrary is clearly made.

Claims

1. An internal combustion engine, comprising: at least one cylinder, the at least one cylinder comprising a combustion chamber; as well as A cylinder head configured to provide a charge flow to the combustion chamber, the cylinder head comprising: a first port connected to a first outlet of the first port, the first port being configured to direct a charge flow into the combustion chamber through the first outlet; a second port connected to a second outlet of the second port, the second port being configured to direct charge flow into the combustion chamber through the second outlet; and a swirl passage connecting an upstream portion of the second port to a downstream portion of the first port, the swirl passage being configured to generate a swirl in the charge flow introduced into the combustion chamber through the first outlet, wherein a portion of the charge flow is diverted from the second port to the first port through the swirl passage. 2 . The internal combustion engine of claim 1 , wherein the second port includes a shield that blocks the second port to divert the charge flow in the second port through the vortex passage.

3. The internal combustion engine of claim 2, wherein the first port is located on a first side of the second port, and the shield is located on the second port so that the charge flow entering through the second port is deflected in the same swirl direction as the charge flow entering through the first port. 4 . The internal combustion engine of claim 1 , wherein the first port and the second port taper toward the first outlet and the second outlet, respectively. 5 . The internal combustion engine of claim 1 , wherein the swirl passage extends from the second port to a location adjacent to a valve seat in the first port. 6 . The internal combustion engine of claim 5 , wherein the swirl passage comprises a uniform diameter from the second port to the first port.

7. The internal combustion engine of claim 1, further comprising an exhaust port, the exhaust port comprising: a third port having a first inlet, the third port being configured to receive exhaust gas flow from the combustion chamber through the first inlet; as well as A fourth port having a second inlet is configured to receive exhaust gas flow from the combustion chamber through the second inlet. 8 . The internal combustion engine of claim 7 , wherein the first and second outlets and the first and second inlets are arranged in a square pattern on the cylinder. 9 . The internal combustion engine of claim 7 , wherein the first and second outlets and the first and second inlets are arranged in a diamond pattern on the cylinder.

10. The internal combustion engine of claim 1, wherein the upstream portion of the second port is a region having a higher pressure than the downstream portion of the first port.

11. A cylinder head for distributing charge flow in an internal combustion engine, the cylinder head comprising: a first port for receiving a first portion of the charge flow, the first port being configured to provide the first portion of the charge flow to a combustion chamber of the internal combustion engine; a second port for receiving a second portion of the inflation flow; as well as a swirl passage connecting an upstream portion of the second port to a downstream portion of the first port, the swirl passage being configured to divert a portion of the second portion of the charge flow from the second port to the first port to generate a swirl in the charge flow in the combustion chamber, while a remainder of the second portion of the charge flow is provided to the combustion chamber through the second port.

12. The cylinder head of claim 11, wherein the cylinder head comprises: a plurality of first ports associated with the plurality of combustion chambers; as well as A plurality of second ports are associated with the plurality of combustion chambers.

13. The cylinder head of claim 12, wherein the first port and the second port converge toward each other.

14. The cylinder head of claim 12, wherein the first port and the second port taper in size toward the combustion chamber.

15. The cylinder head of claim 11, wherein a size of the swirl passage is uniform from the second port to the first port.

16. The cylinder head of claim 11, wherein: The first port includes an upstream portion, and the downstream portion is connected to the upstream portion by a first elbow, and the upstream portion of the first port includes a first inlet, and the downstream portion of the first port includes a first outlet oriented transversely to the first inlet of the first port; and The second port includes a downstream portion and the upstream portion is connected to the downstream portion by a second elbow, and the upstream portion of the second port includes a second inlet and the downstream portion of the second port includes a second outlet oriented transversely to the second inlet of the second port. 17 . The cylinder head of claim 16 , wherein the swirl passage is inclined from a first position proximate to the second inlet to a second position proximate to the first outlet. 18 . The cylinder head of claim 11 , wherein the second port includes a shield that partially blocks the second port to divert charge flow from the second port into the swirl passage.

19. The cylinder head of claim 18, wherein the shield is configured to induce a swirl in a remainder of the second portion of the charge flow provided to the combustion chamber through the second outlet.

20. The cylinder head of claim 11, further comprising: a first intake valve extending into the first port; as well as A second intake valve extends into the second port.

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