Pulsation capture assembly and engine system

Abstract

The invention relates to a pulsation capture assembly and an engine system. A pulsation capture assembly includes a flow combiner conduit. The flow combiner conduit is formed from a single piece of continuous material. The flow combiner conduit includes a middle portion, an inlet portion, and an elbow portion. The inlet portion has a first port in fluid supply communication with the intermediate portion and a second port in fluid supply communication with the intermediate portion. The second port is fluidly separated from the first port. The elbow portion has a third port in fluid receiving communication with the intermediate portion.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and benefit to U.S. Patent Application No. 19 / 257,161, filed July 1, 2025, and U.S. Patent Application No. 63 / 686,345, filed August 23, 2024, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] This disclosure generally relates to the field of exhaust gas recirculation systems. Background Technology

[0004] In an internal combustion engine system, exhaust gas recirculation (EGR) routes exhaust gases from the exhaust manifold to the intake manifold. The recirculated exhaust gases displace the air in the combustion chamber, thus reducing the amount of oxygen in the combustion chamber. The CO2 in the recirculated exhaust gases has a higher specific heat capacity than air, thereby lowering the combustion chamber temperature and reducing NO levels in the combustion chamber. x The formation of. Summary of the Invention

[0005] Various embodiments provide a pulse capture assembly. The pulse capture assembly includes a flow combiner conduit formed from a single piece of continuous material. The flow combiner conduit includes an intermediate portion. The flow combiner conduit includes an inlet portion having a first port in fluid-providing communication with the intermediate portion and a second port in fluid-providing communication with the intermediate portion. The second port is fluidly separated from the first port. The flow combiner conduit includes an elbow portion having a third port in fluid-receiving communication with the intermediate portion.

[0006] In some embodiments, the first end of the first port has a first cross-sectional area; the second end of the first port near the middle portion has a second cross-sectional area smaller than the first cross-sectional area; and the middle opening of the middle portion has a third cross-sectional area smaller than the first cross-sectional area and larger than the second cross-sectional area.

[0007] In some embodiments, the ratio of the first cross-sectional area to the second cross-sectional area is between 1.25 and 1.75.

[0008] In some embodiments, the first end of the second port has a fourth cross-sectional area; the second end of the second port near the middle portion has a fifth cross-sectional area smaller than the fourth cross-sectional area; and the third cross-sectional area of ​​the middle opening is smaller than the fourth cross-sectional area and larger than the fifth cross-sectional area.

[0009] In some embodiments, the elbow portion defines a fluid flow path having a fourth cross-sectional area greater than the third cross-sectional area.

[0010] In some embodiments, the fluid flow path has a first cross-sectional shape near its middle portion, the first cross-sectional shape comprising: a first arcuate profile; a second arcuate profile; and a pair of straight profiles extending between the first and second arcuate profiles; and the fluid flow path has a second cross-sectional shape at its downstream end, the second cross-sectional shape being substantially circular.

[0011] In some embodiments, a first ratio of the first cross-sectional area to the fourth cross-sectional area is between 1.25 and 1.75; and a second ratio of the second cross-sectional area to the fourth cross-sectional area is between 0.75 and 1.00.

[0012] In some embodiments, the elbow portion defines a fluid flow path defined by a flow path axis at a first end of the elbow portion near the middle portion and an outlet axis at a second end of the elbow portion opposite to the first end; and the angle between the fluid flow path and the outlet axis is between 160° and 200°, such that the direction of the fluid flow path through the elbow portion changes between 160° and 200°.

[0013] In some embodiments, the elbow portion defines a fluid flow path such that the fluid flow path is positioned lower at a first end of the elbow portion near the middle portion than at a second end of the elbow portion, the second end being the opposite of the first end.

[0014] In some embodiments, the pulsation capture assembly further includes a bellows positioned downstream of the flow combiner conduit.

[0015] In some embodiments, the pulsation capture assembly further includes a mounting member connected between the bend portion of the bellows and the flow combiner conduit.

[0016] In some embodiments, the elbow portion defines a fluid flow path having a cross-sectional area, at least a portion of which near the middle increases at an angle between 160° and 200°.

[0017] Various other embodiments provide an engine system. The engine system includes an intake manifold. The engine system includes an engine in fluid communication with the intake manifold. The engine system includes an exhaust manifold in fluid communication with the engine. The engine system includes a pulsation trap assembly positioned below a plane defined by a top surface of the engine. The pulsation trap assembly includes a flow combiner duct. The flow combiner duct includes an intermediate portion. The flow combiner duct includes an inlet portion having (i) a first port in fluid communication with the intermediate portion and fluid communication with the exhaust manifold, and (ii) a second port in fluid communication with the intermediate portion and fluid communication with the exhaust manifold. The flow combiner duct includes a bend portion in fluid communication with the intermediate portion and fluid communication with the intake manifold.

[0018] In some embodiments, the flow combiner conduit is formed from a single piece of continuous material.

[0019] In some embodiments, the upstream end of the inlet portion is positioned in front of the downstream end of the elbow portion.

[0020] In some embodiments, the first end of the first port has a first cross-sectional area; the second end of the first port near the middle portion has a second cross-sectional area smaller than the first cross-sectional area; and the middle opening of the middle portion has a third cross-sectional area smaller than the first cross-sectional area and larger than the second cross-sectional area.

[0021] In some embodiments, the elbow portion defines a fluid flow path having a fourth cross-sectional area greater than the third cross-sectional area.

[0022] In some embodiments, the elbow portion defines a fluid flow path defined by a flow path axis at a first end of the elbow portion near the middle portion and an outlet axis at a second end of the elbow portion opposite to the first end; and the angle between the fluid flow path and the outlet axis is between 160° and 200°, such that the direction of the fluid flow path through the elbow portion changes between 160° and 200°.

[0023] In some embodiments, the bend portion defines a fluid flow path such that the fluid flow path is positioned further away from the plane defined by the top surface of the engine at a first end of the bend portion near the middle portion than at a second end of the bend portion, the second end being opposite to the first end.

[0024] In some embodiments, the elbow portion defines a fluid flow path; the fluid flow path has a first cross-sectional shape near its middle portion, the first cross-sectional shape comprising: a first arcuate profile; a second arcuate profile; and a pair of straight profiles extending between the first and second arcuate profiles; and the fluid flow path has a second cross-sectional shape at its downstream end, the second cross-sectional shape being substantially circular.

[0025] These and other features, together with the organization and manner of their operation, will become apparent from the following detailed description taken in conjunction with the accompanying drawings, in which similar elements have similar numbers in all the several drawings described below. Attached Figure Description

[0026] Figure 1 This is a schematic block diagram of an exhaust gas recirculation system according to an example embodiment.

[0027] Figure 2 It can be used Figure 1 A schematic block diagram of the exhaust manifold in the engine system.

[0028] Figure 3 This is a top view of an exhaust gas recirculation system according to an example embodiment.

[0029] Figure 4 yes Figure 3 Side view of the exhaust gas recirculation system.

[0030] Figure 5 It can be used Figure 1 A top view of the pulsation capture component in the exhaust gas recirculation system, shown in the disassembled state.

[0031] Figure 6 It can be used Figure 5 Front view of the flow combiner conduit in the pulsation capture assembly.

[0032] Figure 7 yes Figure 6 Side view of the flow combiner conduit.

[0033] Figure 8 yes Figure 6 Cross-sectional view of the flow combiner conduit.

[0034] Figure 9 yes Figure 6 Another cross-sectional view of the flow combiner conduit.

[0035] Figure 10 yes Figure 6 Another cross-sectional view of the flow combiner duct. Detailed Implementation

[0036] The embodiments described herein generally relate to exhaust gas recirculation (EGR) systems and / or components thereof. More specifically, the embodiments described herein relate to exhaust gas recirculation systems that include exhaust gas pulsation capture components.

[0037] According to various embodiments, the exhaust pulsation capture assembly enables the EGR system to reduce pressure variations (e.g., pressure drops) across the entire EGR system. In some embodiments, components of the EGR system cooperate to improve (e.g., reduce) brake-specific fuel consumption (BSFC) and brake thermal efficiency (BTE).

[0038] In some embodiments, the EGR system is configured to direct exhaust gases from the engine's exhaust manifold to the engine's intake manifold. In some embodiments, the engine is an internal combustion engine that consumes fuel to generate mechanical power. In some embodiments, the engine is one of a diesel engine, a gasoline engine, a hydrogen engine, or a natural gas engine.

[0039] In an example embodiment, the EGR system is configured for exhaust gas recirculation in a natural gas engine. The EGR system includes a pulsation capture assembly. The pulsation capture assembly includes a flow combiner duct formed from a single piece of continuous material. The flow combiner duct includes an intermediate section, an inlet section, and a bend section. The inlet section has a first port in communication with a fluid supply to the intermediate section and a second port in communication with a fluid supply to the intermediate section. The bend section is in communication with a fluid receiving section of the intermediate section.

[0040] Before turning to the accompanying drawings, this document describes various embodiments of an exhaust gas recirculation system, a pulse capture assembly, and components thereof. It should be understood that while individual components are described in detail, these details should be considered as illustrative only. Furthermore, details may include variations described herein. Therefore, it should be understood that although individual components may be described with respect to embodiments, any component may be used in any other embodiment described herein unless otherwise stated.

[0041] refer to Figure 1 A block diagram of an engine system 100 according to an example embodiment is shown. The engine system 100 includes an engine 102. The engine system 100 also includes an intake manifold 110 and an exhaust manifold 120 fluidly coupled to the engine 102. The engine system includes an exhaust gas recirculation (EGR) system 200 fluidly coupled to the intake manifold 110 and the exhaust manifold 120. The EGR system 200 is configured to direct at least a portion of the exhaust gas flow from the exhaust manifold 120 to the intake manifold 110.

[0042] exist Figure 1In this configuration, the engine system 100 is included in a vehicle. The vehicle can be any type of on-road or off-road vehicle, including but not limited to wheel loaders, forklifts, long-haul trucks, mid-range trucks (e.g., pickup trucks), cars, sports cars, tanks, aircraft, boats, and any other type of vehicle. In other embodiments, the engine system 100 may be included in a stationary device, such as a generator or generator set. All these variations are intended to fall within the scope of this disclosure.

[0043] exist Figure 1 In the illustrated configuration, engine 102 is an internal combustion engine (ICE). The ICE burns fuels such as diesel, gasoline, hydrogen, natural gas, etc., to generate power. In some embodiments, engine 102 may be part of a hybrid engine system having a combination of an internal combustion engine and at least one electric motor coupled to at least one battery. In some embodiments, engine system 100 may be configured as a mild-hybrid powertrain, a parallel hybrid powertrain, a series hybrid powertrain, or a series-parallel powertrain.

[0044] Engine 102 includes one or more cylinders 104 (e.g., combustion cylinders). Cylinder 104 is located within the combustion chamber of engine 102. Figure 1 As shown, engine 102 includes six cylinders 104. However, it should be understood that engine 102 may include more than... Figure 1 The cylinders 104 may be more or fewer (e.g., at least one). Furthermore, the cylinders 104 may be provided in any suitable arrangement (e.g., inline, horizontal, V-shaped or other suitable cylinder arrangement).

[0045] Engine system 100 includes an intake manifold 110. The intake manifold 110 is configured to direct an intake airflow comprising air (e.g., ambient air, compressed air, etc.) to engine 102. In some embodiments, the intake airflow comprises fuel. In some embodiments, the intake airflow comprises recirculated exhaust gas. Therefore, the intake airflow may include air, and one or both of fuel and recirculated exhaust gas.

[0046] Engine system 100 includes exhaust manifold 120. Exhaust manifold 120 is configured to direct exhaust gas flow from engine 102 to one or more downstream components. For example, exhaust manifold 120 is configured to direct exhaust gas flow from engine 102 to at least EGR system 200. (References herein) Figure 2 The exhaust manifold 120 is described in more detail.

[0047] In the example arrangement, engine 102 receives an intake airflow from intake manifold 110. The intake airflow may include air (e.g., ambient air), fuel, and / or recirculated exhaust gas (e.g., from EGR system 200). As described above, engine 102 combusts the air / fuel mixture and / or the air / fuel / exhaust gas mixture and outputs exhaust gas. Exhaust manifold 120 receives the exhaust airflow from engine 102.

[0048] like Figure 1 As shown, the EGR system 200 includes a pulsation capture assembly 202. The pulsation capture assembly 202 is configured to receive at least a portion of the exhaust gas flow (e.g., from the exhaust manifold 120). The EGR system 200 includes a cooler assembly 276. The EGR system 200 includes a measurement assembly 280. The EGR system 200 includes a conduit 278 fluidly connecting the cooler assembly 276 to the measurement assembly 280. The EGR system 200 includes a valve assembly 290. The EGR system 200 and its components are described in more detail herein.

[0049] The EGR system 200 is shown together with other components of the engine system 100 (e.g., engine 102 and its components, intake manifold 110, exhaust manifold 120, and downstream devices 140). It should be understood that the components of the engine system 100 shown in dashed lines are merely illustrative. Therefore, some embodiments described herein relate only to the EGR system 200. Other embodiments described herein include the EGR system 200 and one or more other components of the engine system 100, such as engine 102, intake manifold 110, and / or exhaust manifold 120. In these embodiments, for example, the pulsation capture assembly 202 is in fluid receiving communication with exhaust manifold 120 and fluid supply communication with intake manifold 110.

[0050] like Figure 1 As shown, some components of the EGR system 200 (shown in dashed lines) are optional. For example, the measuring component 280, the cooler component 276, and / or the valve component 290 are optional. That is, in some embodiments, the EGR system 200 includes one or more of the measuring component 280, the cooler component 276, and / or the valve component 290. In other embodiments, the EGR system does not include the measuring component 280, the cooler component 276, and the valve component 290.

[0051] like Figure 3As shown, the EGR system 200 (e.g., pulsation capture assembly 202, cooler assembly 276, duct 278, measuring assembly 280, valve assembly 290, etc.) is not located above the engine 102. For example, the pulsation capture assembly 202, cooler assembly 276, duct 278, measuring assembly 280, and valve assembly 290 are located outside a first volume extending upward from the engine 102. As a result, the top of the engine 102 can be accessed without removing components of the EGR system 200. In some embodiments, the EGR system 200 is located outside a second volume extending downward from the engine 102. Figure 3 As shown, when the EGR system 200 extends between the exhaust manifold 120 and the intake manifold 110, the EGR system 200 extends in front of the engine 102. For example, when the EGR system 200 extends between the exhaust manifold 120 and the intake manifold 110, it extends around the front of the engine 102.

[0052] like Figure 4 As shown, at least a portion of the EGR system 200 is positioned on a plane P extending along the top surface of the engine 102 (e.g., the uppermost surface, a horizontal top surface extending along the highest point of the engine 102, etc.). ET Below. For example, the pulsation capture assembly 202, cooler assembly 276, conduit 278, and measuring assembly 280 can be positioned on plane P. ET Below. In some embodiments, the valve assembly 290 is positioned on plane P. ET Below.

[0053] The pulsation capture assembly 202 includes a flow combiner conduit 210 formed from a single piece of continuous material. The flow combiner conduit 210 includes an intermediate portion 216, an inlet portion 214, and a bend portion 218. The inlet portion 214 includes a first port 220 in fluid supply communication with the intermediate portion 216. A second port 222 is fluidly separated from the first port 220. The bend portion 218 has a third port 252 in fluid receiving communication with the intermediate portion 216.

[0054] As described above, the flow combiner conduit 210 is formed from a single continuous material. For example, the flow combiner conduit 210 can be formed from a single piece of material, a single material, an integral component, an integral structural component, etc. It can be formed integrally, it can be a one-piece component, it can be formed from a homogeneous material, it can be a unified component, etc.

[0055] In some embodiments, the first port 220 and the second port 222 are oriented toward the front end of the engine 102 (e.g., the first port 220 and the second port 222 are open toward the front end of the engine 102, etc.).

[0056] Engine system 100 includes an intake manifold 110, an engine 102 in fluid receiving communication with the intake manifold 110, an exhaust manifold 120 in fluid receiving communication with the engine 102, and a pulsation capture assembly 202 positioned below the top surface of the engine 102. Pulsation capture assembly 202 includes a flow combiner duct 210. Flow combiner duct 210 includes an intermediate portion 216, an inlet portion 214, and a bend portion 218. Inlet portion 214 includes (i) a first port 220 in fluid supply communication with intermediate portion 216 and fluid receiving communication with exhaust manifold 120, and (ii) a second port 222 in fluid supply communication with intermediate portion 216 and fluid receiving communication with exhaust manifold 120. Bend portion 218 is in fluid receiving communication with intermediate portion 216 and fluid supply communication with intake manifold 110.

[0057] In some embodiments, engine system 100 includes engine 102, intake manifold 110, exhaust manifold 120, downstream device 140, and EGR system 200. Downstream device 140 can be any suitable component located downstream of exhaust manifold 120. In some embodiments, downstream device 140 is coupled to exhaust manifold 120 such that downstream device 140 receives at least a portion of the exhaust gas flow from exhaust manifold 120.

[0058] In some embodiments, the downstream device 140 is a turbine device. The turbine device can be any type of turbomachinery, such as a turbocharger, a variable geometry turbocharger, a power turbine, etc. In some embodiments, the turbine device is operatively coupled to the engine 102 and / or another component of the engine system 100, such as a drivetrain, battery, motor, or other suitable component.

[0059] In some embodiments, the downstream device 140 is a dual-wastegate turbocharger. The dual-wastegate turbocharger includes a first inlet and a second inlet. The first inlet is configured to receive a first portion of the exhaust gas flow (e.g., from exhaust manifold 120). The second inlet is configured to receive a second portion of the exhaust gas flow (e.g., from exhaust manifold 120).

[0060] As described above, in some embodiments, one or more of the engine 102, intake manifold 110, exhaust manifold 120 and downstream device 140 may not be included in the provided system; that is, a system or subsystem containing fewer than all the components of the engine system 100 may be provided.

[0061] The flow path of the airflow (e.g., exhaust gas flow or a portion thereof) through the EGR system 200 is... Figure 1As shown in the diagram. Furthermore, the relative positioning of the components of the EGR system 200 is... Figure 1 The relative positioning of the components of the EGR system 200 is shown in the figure. However, it should be understood that the relative positioning of the components of the EGR system 200 is shown only as an example, and in other embodiments, the components of the EGR system 200 may be positioned in a different order and / or the EGR system 200 may include components that are more than the specified relative positioning. Figure 1 The document refers to more or fewer components. Figure 1 The location of the components of the EGR system 200 is described.

[0062] like Figure 1 As shown, the EGR system 200 includes a pulsation capture assembly 202. The pulsation capture assembly 202 includes a flow combiner conduit 210 and bellows 270. (References provided in this document) Figures 5-10 The structure and function of each component of the pulse capture assembly 202 are described.

[0063] The flow combiner conduit 210 is connected to the exhaust manifold 120. A first end of the flow combiner conduit 210 is connected to the exhaust manifold 120. The flow combiner conduit 210 is in fluid receiving communication with the exhaust manifold 120. The exhaust manifold 120 is in fluid supply communication with the flow combiner conduit 210. A second end of the flow combiner conduit 210 is connected to the bellows 270.

[0064] Bellows 270 is positioned downstream of flow combiner conduit 210. Bellows 270 is coupled to flow combiner conduit 210 (e.g., a second end of flow combiner conduit 210). Bellows 270 is in fluid receiving communication with flow combiner conduit 210. Flow combiner conduit 210 is in fluid supply communication with bellows 270. The second end of bellows 270 is coupled to cooler assembly 276. In other embodiments, pulsation capture assembly 202 does not include bellows 270.

[0065] In some embodiments, the EGR system 200 includes a cooler assembly 276. The cooler assembly 276 is coupled to a bellows 270. A first end of the cooler assembly 276 is coupled to the bellows 270 (e.g., a second end of the bellows 270). The cooler assembly 276 is in fluid receiving communication with the bellows 270. The bellows 270 is in fluid supply communication with the cooler assembly 276. A second end of the cooler assembly 276 is coupled to a conduit 278. In other embodiments, the EGR system 200 does not include a cooler assembly 276. In these embodiments, the bellows 270 is fluidly coupled to a measuring assembly 280 or a valve assembly 290. In other embodiments, the pulsation capture assembly 202 does not include a bellows 270. In these embodiments, the cooler assembly 276 is fluidly coupled to a flow combiner conduit 210.

[0066] Cooler assembly 276 is configured to facilitate thermal cooling of exhaust gas flow passing through it. For example, cooler assembly 276 may include a heat exchanger configured to reduce the temperature of exhaust gas flow passing through cooler assembly 276.

[0067] Conduit 278 is connected to cooler assembly 276. A first end of conduit 278 is connected to cooler assembly 276 (e.g., a second end of cooler assembly 276). Conduit 278 is in fluid receiving communication with cooler assembly 276. Cooler assembly 276 is in fluid supply communication with conduit 278. The second end of conduit 278 is connected to measuring assembly 280. Conduit 278 is configured to guide exhaust gas flow from cooler assembly 276 to measuring assembly 280.

[0068] In some embodiments, the EGR system 200 includes a measuring component 280. The measuring component 280 is coupled to a conduit 278. A first end of the measuring component 280 is coupled to the conduit 278 (e.g., a second end of the conduit 278). The measuring component 280 is in fluid receiving communication with the conduit 278. The conduit 278 is in fluid supply communication with the measuring component 280. A second end of the measuring component 280 is coupled to a valve assembly 290. In other embodiments, the EGR system 200 does not include a measuring component 280.

[0069] In some embodiments, the EGR system 200 includes a valve assembly 290. The valve assembly 290 is coupled to a measuring assembly 280. A first end of the valve assembly 290 is coupled to the measuring assembly 280 (e.g., a second end of the measuring assembly 280). The valve assembly 290 is in fluid receiving communication with the measuring assembly 280. The measuring assembly 280 is in fluid supply communication with the valve assembly 290. A second end of the valve assembly 290 is coupled to an intake manifold 110. The valve assembly 290 is in fluid supply communication with the intake manifold 110. The intake manifold 110 is in fluid receiving communication with the valve assembly 290. In other embodiments, the EGR system 200 does not include a valve assembly 290. In these embodiments, the measuring assembly 280 is fluidly coupled to the engine 102 (e.g., via the intake manifold 110).

[0070] Valve assembly 290 is configured to selectively supply exhaust gas flow to intake manifold 110. In some embodiments, valve assembly 290 includes a valve operable between an open position and a closed position. In the open position, the valve allows the maximum flow rate therethrough. In the closed position, the valve allows the minimum flow rate therethrough (e.g., no flow). In an intermediate position, the valve allows an intermediate flow rate therethrough.

[0071] Now for reference Figure 2 A schematic block diagram of a portion of an engine system 100 according to an example embodiment is shown. In particular, an exhaust manifold 120 according to an example embodiment is shown.

[0072] As described above, engine 102 includes one or more cylinders 104. Figure 2 As shown, engine 102 includes six cylinders 104 (e.g., first cylinder 104(a), second cylinder 104(b), third cylinder 104(c), fourth cylinder 104(d), fifth cylinder 104(e), and sixth cylinder 104(f)). It should be understood that engine 102 may include more than... Figure 2 The cylinders 104 may be more or fewer (e.g., at least one). The cylinders 104 may be provided in any suitable arrangement (e.g., inline, horizontal, V-shaped or other suitable cylinder arrangement).

[0073] Exhaust manifold 120 is fluidly connected to engine 102. Exhaust manifold 120 receives exhaust gas flow from engine 102. In some embodiments, exhaust manifold 120 includes a first inlet portion 122 and a second inlet portion 124. The first inlet portion 122 is configured to receive exhaust gas flow from a first group of cylinders 104 (e.g., first cylinder 104(a), second cylinder 104(b), and third cylinder 104(c)). The first inlet portion 122 includes one or more inlet ports (e.g., openings, etc.), each inlet port enabling fluid communication between the corresponding cylinder and exhaust manifold 120. The second inlet portion 124 is configured to receive exhaust gas flow from a second group of cylinders 104 (e.g., fourth cylinder 104(d), fifth cylinder 104(e), and sixth cylinder 104(f)). The second inlet portion 124 includes one or more inlet ports (e.g., openings, etc.), each inlet port enabling fluid communication between the corresponding cylinder and exhaust manifold 120.

[0074] The exhaust manifold 120 includes a first outlet portion 132, a second outlet portion 134, a third outlet portion 136, and a fourth outlet portion 138. The first outlet portion 132 is configured to direct a first portion of exhaust gas to a pulsation trap assembly 202. The first outlet portion 132 is fluidly coupled to the pulsation trap assembly 202. The second outlet portion 134 is configured to direct a second portion of exhaust gas to the pulsation trap assembly 202. The second outlet portion 134 is fluidly coupled to the pulsation trap assembly 202. The third outlet portion 136 is configured to direct a third portion of exhaust gas to a downstream device 140. The third outlet portion 136 is fluidly coupled to the downstream device 140. The fourth outlet portion 138 is configured to direct a fourth portion of exhaust gas to the downstream device 140. The fourth outlet portion 138 is fluidly coupled to the downstream device 140.

[0075] The exhaust manifold 120 includes one or more flow channels (e.g., ducts, channels, etc.) for guiding received exhaust gas (e.g., exhaust gas received at a first inlet portion 122 and / or a second inlet portion 124) to downstream components (e.g., pulsation capture assembly 202 and / or downstream device 140). A first flow channel 126 of the one or more flow channels is configured to guide a first portion of the exhaust gas flow from the first inlet portion 122 to a first outlet portion 132. A second flow channel 127 of the one or more flow channels is configured to guide a second portion of the exhaust gas flow from the second inlet portion 124 to the second outlet portion 134. A third flow channel 128 of the one or more flow channels is configured to guide a third portion of the exhaust gas flow from the first inlet portion 122 to the third outlet portion 136. A fourth flow channel 129 of the one or more flow channels is configured to guide a fourth portion of the exhaust gas flow from the second inlet portion 124 to the fourth outlet portion 138.

[0076] The exhaust manifold 120 directs a first portion of the exhaust gas flow from a first group of cylinders (e.g., first cylinder 104(a), second cylinder 104(b), and third cylinder 104(c)) to the pulse capture assembly 202. The exhaust manifold 120 also directs a second portion of the exhaust gas flow from a second group of cylinders (e.g., fourth cylinder 104(d), fifth cylinder 104(e), and sixth cylinder 104(f)) to the pulse capture assembly 202.

[0077] In an example embodiment, the flow combiner conduit 210 is in fluid receiving communication with the exhaust manifold 120. The exhaust manifold 120 includes a first outlet portion 132 and a second outlet portion 134. A first port 220 of the flow combiner conduit is in exhaust gas receiving communication with the first outlet portion 132. A second port 222 of the flow combiner conduit 210 is in exhaust gas receiving communication with the second outlet portion 134. For example, the flow combiner conduit 210 is configured to receive a first exhaust gas flow portion at the first port 220 via the first outlet portion 132 and a second exhaust gas flow portion at the second port 222 via the second outlet portion 134.

[0078] The exhaust manifold 120 includes a first inlet portion 122, a second inlet portion 124, and one or more flow passages. The first inlet portion 122 is in exhaust gas receiving communication with a first group of cylinders 104 of the engine 102. The second inlet portion 124 is in exhaust gas receiving communication with a second group of cylinders 104 of the engine 102. For example, the first inlet portion 122 is configured to receive a first exhaust gas flow from the first group of cylinders 104 of the engine 102, and the second inlet portion 124 is configured to receive a second exhaust gas flow from the second group of cylinders 104 of the engine 102. A first flow passage 126 of the one or more flow passages is configured to guide a portion of the first exhaust gas flow (e.g., a portion of the first exhaust gas flow) from the first inlet portion 122 to a first outlet portion 132. A second flow passage 127 of the one or more flow passages is configured to guide a portion of the second exhaust gas flow (e.g., a portion of the second exhaust gas flow) from the second inlet portion 124 to the second outlet portion 134.

[0079] Now for reference Figure 5 The image shows a top view of the pulsation capture assembly 202. The pulsation capture assembly 202 is shown in a disassembled state. In an example embodiment, the pulsation capture assembly 202 for the exhaust gas recirculation system 200 includes a flow combiner duct 210 and a bellows 270.

[0080] The flow combiner conduit 210 includes an intermediate portion 216, an inlet portion 214, and an elbow portion 218, all formed from a single piece of continuous material. The inlet portion 214 includes a first port 220 in fluid supply communication with the intermediate portion 216 and a second port 222 in fluid supply communication with the intermediate portion 216. The second port 222 is fluidly separated from the first port 220. The elbow portion 218 includes a third port 252 in fluid receiving communication with the intermediate portion 216. In some embodiments, the third port 252 is oriented toward the front end of the engine 102 (e.g., the opening of the third port 252 points toward the front end of the engine 102, the opening of the third port 252 points in the same direction as the openings of the first port 220 and the second port 222, etc.).

[0081] In some embodiments, the third port 252 is located behind the first port 220 and the second port 222. For example, the first port 220 and the second port 222 are located at the front end of the catheter body 212, the rear portion of the elbow portion 218 is located at the rear end of the catheter body 212, and the third port 252 is located between the front end and the rear end of the catheter body 212.

[0082] By forming the flow combiner conduit 210 from a single continuous material, the pulsation trapping assembly 202 can be configured such that there are no potential leakage paths between the intermediate portion 216 and the inlet portion 214, and between the intermediate portion 216 and the elbow portion 218. Advantageously, the reduction or mitigation of leakage paths in the pulsation trapping assembly 202 reduces variations in exhaust leakage from the pulsation trapping assembly 202 into the surrounding environment. For example, when the flow combiner conduit 210 is formed from a single continuous material, exhaust may not leak from the flow combiner conduit 210 at the location between the intermediate portion 216 and the inlet portion 214, or may not leak between the intermediate portion 216 and the elbow portion 218.

[0083] When bellows 270 is included, bellows 270 is positioned downstream of flow combiner conduit 210 and is in communication with the fluid receiver at the third port 252.

[0084] In some embodiments, the pulsation capture assembly 202 includes a first sealing member 204. The first sealing member 204 is located between the exhaust manifold 120 and the pulsation capture assembly 202. The first sealing member 204 is configured to form a seal between the exhaust manifold 120 and the pulsation capture assembly 202.

[0085] Pulsation capture assembly 202 includes flow combiner conduit 210. Figure 10 A cross-sectional view of a flow combiner duct 210 is shown. The flow combiner duct 210 is a duct configured to receive two airflows (e.g., a first exhaust airflow portion and a second exhaust airflow portion). The flow combiner duct 210 receives two airflows from an upstream component (such as exhaust manifold 120). The flow combiner duct 210 is configured to combine the two airflows into a single (e.g., combined) airflow.

[0086] The flow combiner duct 210 is configured to provide combined airflow to a downstream component (e.g., bellows 270 or another downstream component). In an example embodiment, the geometry of the flow combiner duct 210 allows the first and second exhaust airflow portions to mix while reducing turbulence in the combined airflow. For example, the geometry of the flow combiner duct 210 allows the first and second exhaust airflow portions to mix, such that the flow through the flow combiner duct 210 is substantially laminar.

[0087] The flow combiner conduit 210 includes a conduit body 212. The conduit body 212 includes an inlet portion 214, an intermediate portion 216, and a bend portion 218. The inlet portion 214 is located at a first end of the conduit body 212. The bend portion 218 is located at a second end of the conduit body 212 opposite to the first end. The intermediate portion 216 is positioned between the inlet portion 214 and the bend portion 218 (e.g., between the first and second ends of the conduit body 212).

[0088] Inlet portion 214 includes a first port 220 (e.g., a first inlet port) and a second port 222 (e.g., a second inlet port). The first port 220 is connected to the first inlet axis A. I1 The second port 222 is defined by the second inlet axis A. I2 Limited. First entrance axis A I1 Second inlet axis A I2 They are oriented parallel to each other. In some embodiments, the first inlet axis A I1 Second inlet axis A I2 They are coplanar in the horizontal plane extending through the flow combiner conduit 210. In other embodiments, the first inlet axis A I1 Second inlet axis A I2 Coplanar on a non-horizontal plane (e.g., a vertical plane, an angled plane, etc.) extending through the flow combiner duct 210.

[0089] The first end 224 of the first port 220 near the first end of the catheter body 212 and the first end 226 of the second port 222 have a first cross-sectional area (e.g., flow-by area, etc.). The second end 228 of the first port 220 near the inlet portion 214 and the second end 230 of the second port 222 have a second cross-sectional area smaller than the first cross-sectional area. In an example embodiment, the first ratio of the first cross-sectional area of ​​the first port 220 and the second cross-sectional area of ​​the second port 222 is between about 1.25 and about 1.75, for example, about 1.53.

[0090] At the inlet portion 214 of the catheter body 212, the first port 220 is separated from the second port 222 by the catheter wall 232. The catheter wall 232 extends from the first end of the catheter body 212 toward the intermediate portion 216. In some embodiments, the catheter wall 232 extends into or into the intermediate portion 216. In other embodiments, the catheter wall 232 does not extend into the intermediate portion 216.

[0091] The first port 220 is configured to receive a first portion of the exhaust gas flow. In some embodiments, the first port 220 is fluidly coupled to a first outlet portion 132 of the exhaust manifold 120, such that the first port 220 receives a first portion of the exhaust gas flow from the exhaust manifold 120 via the first outlet portion 132. The flow combiner duct 210 is configured to receive the first exhaust gas flow portion at the first port 220 via the first outlet portion 132.

[0092] The second port 222 is configured to receive a second portion of the exhaust gas flow. In some embodiments, the second port 222 is fluidly coupled to a second outlet portion 134 of the exhaust manifold 120, such that the second port 222 receives a second portion of the exhaust gas flow from the exhaust manifold 120 via the second outlet portion 134. The flow combiner duct 210 is configured to receive the second exhaust gas flow portion at the second port 222 via the second outlet portion 134.

[0093] The dual-inlet design of the flow combiner duct 210 advantageously allows it to receive two different exhaust gas flows from the exhaust manifold 120 (e.g., a "split manifold"). (See above regarding...) Figure 2 The first exhaust gas flow portion is received from the first group of cylinders 104, and the second exhaust gas flow portion is received from the second group of cylinders 104.

[0094] In some embodiments, the exhaust gas flow has “alternate pulsation.” As used herein, “alternate pulsation” refers to the alternating flow in the exhaust gas flow caused by the timing of the opening and / or closing of the exhaust valve of cylinder 104. For example, the flow combiner conduit 210 receives a first “pulsation” (e.g., via first port 220) of the first exhaust gas flow portion before receiving a second “pulsation” (e.g., via second port 222) of the second exhaust gas flow portion. The flow combiner conduit 210 advantageously facilitates the combination of the first and second exhaust gas flow portions therein, and substantially prevents backflow due to the alternating pulsation in the first and second exhaust gas flow portions. For example, the flow combiner conduit 210 substantially prevents the first exhaust gas flow portion from flowing through second port 222. The flow combiner conduit 210 substantially prevents the second exhaust gas flow portion from flowing through first port 220.

[0095] The inlet portion 214 includes a first mounting flange 234 extending outward (e.g., radially outward) from a first end of the conduit body 212. In some embodiments, the first mounting flange 234 is integrally formed with the inlet portion 214 (e.g., integrally formed with the conduit body 212, the conduit body 212 and the first mounting flange 234 being formed of a single continuous material, etc.). The first mounting flange 234 defines one or more openings 236. Each of the one or more openings 236 is sized to receive a fastener. When each of the one or more openings 236 receives a fastener, the fastener engages the flow combiner conduit 210 to the exhaust manifold 120. In this way, the first mounting flange 234 enables engagement of the flow combiner conduit 210 to the exhaust manifold 120. In other embodiments, the first mounting flange 234 enables engagement of the flow combiner conduit 210 to the engine 102. For example, when each of one or more openings 236 receives a fastener, the fastener connects the flow combiner conduit 210 to the engine 102.

[0096] In some embodiments, the first mounting flange 234 includes a first portion extending upward from the inlet portion 214 and a second portion extending downward from the inlet portion 214. Each of the first portion and the second portion of the first mounting flange 234 defines at least one of one or more openings 236. In this way, the first mounting flange 234 enables the flow combiner conduit 210 to be coupled to the exhaust manifold 120 at a first location above the inlet portion 214 (e.g., above the first port 220 and the second port 222, etc.) and enables the flow combiner conduit 210 to be coupled to the exhaust manifold 120 at a second location below the inlet portion 214 (e.g., below the first port 220 and the second port 222, etc.). In other embodiments, the first mounting flange 234 includes a portion extending outward from one side (e.g., the left side, the right side, etc.) of the inlet portion 214.

[0097] The intermediate portion 216 of the conduit body 212 is configured to receive a first airflow portion and a second airflow portion. The intermediate portion 216 defines an intermediate opening 237 extending from a first end 238 near the inlet portion 214 of the intermediate portion 216 to a second end 240 opposite to the first end 238. The intermediate portion 216 is configured to allow the first and second airflow portions to mix. In an example embodiment, the first airflow flowing from the first port 220 and the second airflow flowing from the second port 222 enter the intermediate portion 216 of the conduit body 212 and are allowed to mix therein. The combined airflow then flows into the elbow portion 218.

[0098] The intermediate opening 237 at the first end 238 of the intermediate portion 216 has a third cross-sectional area, which is larger than the second cross-sectional area of ​​the first port 220 and the second port 222. In some embodiments, the third cross-sectional area of ​​the intermediate opening 237 at the first end 238 of the intermediate portion 216 is larger than the first cross-sectional area of ​​the first port 220 and the second port 222. The intermediate opening 237 at the second end 240 of the intermediate portion 216 near the bend portion 218 has a fourth cross-sectional area smaller than the third cross-sectional area.

[0099] In some embodiments, the fourth cross-sectional area of ​​the intermediate opening 237 is smaller than the first cross-sectional area of ​​the first port 220 and the second port 222. In an example embodiment, the second ratio of the first cross-sectional area of ​​the first port 220 and the second port 222 to the fourth cross-sectional area of ​​the intermediate opening 237 is between about 1.25 and about 1.75, for example, about 1.48.

[0100] In some embodiments, the fourth cross-sectional area of ​​the intermediate opening 237 is larger than the second cross-sectional area of ​​the first port 220 and the second port 222. In an example embodiment, the third ratio of the second cross-sectional area of ​​the first port 220 and the second port 222 to the fourth cross-sectional area of ​​the intermediate opening 237 is between about 0.75 and about 1.25, for example, about 0.97. In another example embodiment, the third ratio of the second cross-sectional area of ​​the first port 220 and the second port 222 to the fourth cross-sectional area of ​​the intermediate opening 237 is between about 0.75 and about 1.00, for example, about 0.97.

[0101] The intermediate opening 237 at the second end 240 of the intermediate portion 216 has a rounded cross-sectional shape. According to... Figure 8In the illustrated example embodiment, the intermediate opening 237 at the second end 240 of the intermediate portion 216 has a race-track cross-sectional shape. The race-track cross-sectional shape includes a first arcuate cross-sectional profile 242, a second arcuate cross-sectional profile 244, and a pair of straight cross-sectional profiles 246 extending between the first and second arcuate cross-sectional profiles 242. In the illustrated example embodiment, the first of the straight cross-sectional profiles 246 extends between a first side of the first arcuate cross-sectional profile 242 and a first side of the second arcuate cross-sectional profile 244, and the second of the straight cross-sectional profiles 246 extends between a second side of the first arcuate cross-sectional profile 242 and a second side of the second arcuate cross-sectional profile 244, the second side of the first arcuate cross-sectional profile 242 and the second side of the second arcuate cross-sectional profile 244 being opposite to the first side of the first arcuate cross-sectional profile 242 and the first side of the second arcuate cross-sectional profile 244. In other embodiments, the intermediate opening 237 at the second end 240 of the intermediate portion 216 has an elliptical or circular cross-sectional shape.

[0102] Elbow portion 218 is configured to receive combined airflow. Elbow portion 218 is configured to direct the combined airflow to downstream components, such as cooler assembly 276, measuring assembly 280, and / or another downstream component.

[0103] The elbow portion 218 includes a third port 252 (e.g., an outlet port). The third port 252 is configured to supply combined airflow to a downstream component, such as the bellows 270. The third port 252 is located via an outlet axis A. O Limitation. In some embodiments, the outlet axis A O Parallel to the first inlet axis A I1 Second inlet axis A I2 Orientation. In other embodiments, the outlet axis A O With the first entrance axis A I1 Second inlet axis A I2 Oriented non-parallel (e.g., perpendicular, etc.). In some embodiments, the outlet axis A O Positioned on the first entrance axis A I1 Second inlet axis A I2 At a certain distance above. As an example, the bend portion 218 can extend upward from a first end 248 near the middle portion 216 of the bend portion 218 to a second end 250 opposite to the first end 248 of the bend portion 218. In other embodiments, the first inlet axis A I1 Second entrance axis A I2 and export axis A OThey are coplanar. In another embodiment, the outlet axis A O Positioned on the first entrance axis A I1 Second inlet axis A I2 At a certain distance below.

[0104] refer to Figure 10 The elbow portion 218 defines a fluid flow path 254 extending from a first end 248 of the elbow portion 218 to a second end 250 of the elbow portion 218. The fluid flow path 254 at the first end 248 of the elbow portion 218 is defined by the flow path axis A. FP The fluid flow path 254 at the second end 250 of the elbow portion 218 is defined by the outlet axis A. O Limitation. In some embodiments, the flow path axis A FP Parallel to the first inlet axis A I1 Second entrance axis A I2 and / or export axis A O Orientation. In other embodiments, the flow path axis A FP With the first entrance axis A I1 Second entrance axis A I2 and / or export axis A O Oriented in a non-parallel (e.g., perpendicular) manner.

[0105] The fluid flow path 254 at the first end 248 of the elbow portion 218 has a fifth cross-sectional area that is substantially similar to or the same as the fourth cross-sectional area of ​​the intermediate opening 237. The fluid flow path 254 at the second end 250 of the elbow portion 218 has a sixth cross-sectional area that is larger than the fourth cross-sectional area of ​​the intermediate opening 237. In some embodiments, the sixth cross-sectional area of ​​the fluid flow path 254 is larger than the first and second cross-sectional areas of the first port 220 and the second port 222. In some embodiments, the sixth cross-sectional area of ​​the fluid flow path 254 is larger than the third cross-sectional area of ​​the intermediate opening 237 of the intermediate portion 216 and the fourth cross-sectional area of ​​the intermediate opening 237 of the intermediate portion 216.

[0106] The geometry of the duct body 212 (e.g., cross-sectional geometry, flow area, cross-sectional diameter) allows the first and second airflows to mix while reducing turbulence. Advantageously, the reduction or suppression of turbulence in the combined airflows as they flow through the flow combiner duct 210 reduces pressure changes (e.g., pressure drop). For example, the increased cross-sectional area of ​​the elbow portion 218 advantageously reduces the velocity of the combined airflows. The relative sizes of the fifth and sixth cross-sectional areas of the elbow portion 218 can be selected to improve (e.g., reduce) pressure changes (e.g., pressure drop). For example, the geometry of the elbow portion 218 reduces flow separation (e.g., turbulence) and / or reduces velocity to increase pressure.

[0107] The flow path axis A of the fluid flow path 254 at the first end 248 of the bend 218 FP The outlet axis A at the second end 250 of the elbow section 218 O The fluid flow path 254 is substantially semi-circular in shape (e.g., semi-circular, semi-elliptical, semi-oval, etc.) such that the first angle θ1 at which the fluid flow path 254 changes direction via the bend portion 218 is approximately 180°, for example, between 160° and 200°. The bend portion 218 has an arcuate cross-sectional shape.

[0108] according to Figure 9 In the illustrated example embodiment, the fluid flow path 254 defined by the bend portion 218 has a racetrack-shaped cross-sectional shape at a first end 248 of the bend portion 218 (e.g., near the intermediate portion 216, at the upstream end of the fluid flow path 254, etc.) to match the racetrack-shaped cross-sectional shape of the intermediate opening 237 at the second end 240 of the intermediate portion 216, and the fluid flow path 254 has a substantially circular cross-sectional shape at the second end 250 of the bend portion 218 (e.g., at the downstream end of the fluid flow path 254, etc.), and an intermediate cross-sectional shape extending between the racetrack-shaped cross-sectional shape and the substantially circular cross-sectional shape is configured such that the intermediate cross-sectional shape smoothly transitions from the racetrack-shaped cross-sectional shape to the substantially circular cross-sectional shape. The racetrack-shaped cross-sectional shape of the fluid flow path 254 includes a first arcuate cross-sectional profile 256, a second arcuate cross-sectional profile 258, and a pair of straight cross-sectional profiles 260 extending between the first arcuate cross-sectional profile 256 and the second arcuate cross-sectional profile 258. In various embodiments, the fluid flow path 254 has a racetrack-shaped cross-sectional shape, an oval-shaped cross-sectional shape, an elliptical cross-sectional shape, a circular cross-sectional shape, and / or an intermediate cross-sectional shape that transitions between any other cross-sectional shape.

[0109] The cross-sectional area of ​​the fluid flow path 254 defined by the elbow portion 218 increases from the first end 248 of the elbow portion 218 (e.g., the fifth cross-sectional area of ​​the elbow portion 218 at the upstream end of the fluid flow path 254) to the second end 250 of the elbow portion 218 (e.g., the sixth cross-sectional area of ​​the elbow portion 218 at the downstream end of the fluid flow path 254). For example, the cross-sectional area of ​​the fluid flow path 254 increases along the length of the fluid flow path 254 from the inlet portion 214 to the third port 252.

[0110] In some embodiments, the fluid flow path 254 extends upward from the first end 248 of the bend portion 218 to the second end 250 of the bend portion 218, such that the fluid flow path 254 at the first end 248 of the bend portion 218 is lower than the fluid flow path 254 at the second end 250 of the bend portion 218.

[0111] Reference Figure 7 The cross-sectional area of ​​the elbow portion 218 is at least a portion of the length of the fluid flow path 254 from the first end 248 of the elbow portion 218 to the second end 250 of the elbow portion 218 relative to the flow path axis A. FP The second angle θ2 increases. For example, at least a portion of the bend portion 218 defining the fluid flow path 254 may extend away from the flow path axis A along at least a portion of the length of the fluid flow path 254 at the second angle θ2. FP The second angle θ2 is between approximately 12° and approximately 16°, for example, approximately 14°.

[0112] The elbow portion 218 includes a second mounting flange 262 extending outward (e.g., radially outward) from the elbow portion 218 at a second end 250 of the elbow portion 218. In some embodiments, the second mounting flange 262 is integrally formed with the elbow portion 218 (e.g., integrally formed with the conduit body 212, the conduit body 212 and the second mounting flange 262 being formed of a single continuous material, etc.).

[0113] Return to reference Figure 5 The pulsation capture assembly 202 includes a second sealing member 264. The second sealing member 264 is located between the flow combiner conduit 210 and the bellows 270. The second sealing member 264 is configured to form a seal between the flow combiner conduit 210 and the bellows 270.

[0114] The pulsation capture assembly 202 includes a first mounting member 266. The first mounting member is positioned between a flow combiner conduit 210 and a bellows 270. The first mounting member 266 is configured to facilitate coupling of the flow combiner conduit 210 to the bellows 270. The first mounting member 266 is configured to engage a second mounting flange 262 of a bend portion 218 to couple the flow combiner conduit 210 to the bellows 270. In some embodiments, the first mounting member 266 facilitates coupling of the pulsation capture assembly 202 to the engine 102.

[0115] Bellows 270 is configured to receive exhaust gas flow from flow combiner duct 210. Bellows 270 is configured to reduce the effects of thermal stress (e.g., mechanical stress caused by temperature changes in the material) on surrounding components (e.g., flow combiner duct 210 and / or cooler assembly 276). In some embodiments, bellows 270 is made of a flexible material (e.g., stainless steel) or other suitable material. The flexible material of bellows 270 allows bellows 270 to expand and / or contract with temperature changes in bellows 270, pulsation trapping assembly 202, and / or cooler assembly 276 (e.g., due to temperature changes in the gas flow passing through them). For example, the dimensions of bellows 270 (e.g., axial dimensions, radial dimensions, circumferential dimensions) expand (e.g., increase) and / or contract (e.g., decrease) with temperature changes in bellows 270, pulsation trapping assembly 202, and / or cooler assembly 276. As the temperature of the pulsation capture assembly 202 and / or the cooler assembly 276 increases, at least one dimension of the bellows 270 changes. As the temperature of the pulsation capture assembly 202 and / or the cooler assembly 276 decreases, at least one dimension of the bellows 270 changes. In this way, the bellows 270 advantageously reduces thermal stress on the flow combiner duct 210 and / or the cooler assembly 276.

[0116] The pulsation capture assembly 202 includes a third sealing member 272. The third sealing member 272 is located between the bellows 270 and a downstream component (e.g., a cooler assembly 276, a measuring assembly 280, a valve assembly 290, and / or another downstream component). The third sealing member 272 is configured to form a seal between the bellows 270 and the downstream component.

[0117] The pulsation capture assembly 202 includes a second mounting member 274. The second mounting member 274 is located between the bellows 270 and a downstream component (e.g., a cooler assembly 276, a measuring assembly 280, a valve assembly 290, and / or another downstream component). The second mounting member 274 is configured to facilitate coupling of the bellows 270 to the downstream component. In some embodiments, the second mounting member 274 facilitates coupling of the pulsation capture assembly 202 to the engine 102.

[0118] In some embodiments, because the bellows 270 is held between the first mounting member 266 and the second mounting member 274, the ends of the bellows 270 are substantially prevented from moving in the axial dimension. Therefore, the expansion and / or contraction of the bellows 270 (e.g., due to temperature changes in the bellows 270) is limited to expansion or contraction in the radial and circumferential dimensions and / or expansion or contraction in the axial dimension of the middle portion of the bellows 270.

[0119] It should be noted that the term "example" used herein to describe various embodiments is intended to indicate that such embodiments are possible examples, representations and / or illustrations of possible embodiments (and such terms are not intended to mean that such embodiments must be particular or excellent examples).

[0120] As used herein, the terms “link,” “connection,” and similar terms mean that two components are directly or indirectly linked to each other. Such a link can be fixed (e.g., permanent) or movable (e.g., removable or releasable). Such a link can be achieved by the two components, or two components and any additional intermediate components, being integrally formed into a single whole, or by the two components, or two components and any additional intermediate components, being attached to each other.

[0121] References to element positions (e.g., "top", "bottom", "above", "below", etc.) herein are used only to describe the orientation of the various elements in the accompanying drawings. It should be noted that, according to other exemplary embodiments, the orientation of different elements may differ, and such variations are intended to be covered by this disclosure.

[0122] It is important to note that the constructions and arrangements of the various example embodiments are merely illustrative. While only a few embodiments are described in detail in this disclosure, those skilled in the art who review this disclosure will readily recognize that many modifications (e.g., variations in the size, dimensions, structure, shape and proportions of various elements, various parameters, mounting arrangements, use of materials, color, orientation, etc.) are possible without substantially departing from the novel teachings and advantages of the subject matter described herein. For example, an element shown as integrally formed may be composed of multiple parts or elements, the positions of elements may be reversed or otherwise changed, and the nature or number or position of discrete elements may be altered or varied. According to alternative embodiments, the order or sequence of any process or method steps may be changed or rearranged. Other substitutions, modifications, variations, and omissions may also be made in the design, operating conditions, and arrangements of the various example embodiments without departing from the scope of the concept provided herein.

[0123] While this specification contains numerous details of specific embodiments, these should not be construed as limiting the scope of any invention or the scope that can be claimed, but rather as descriptions of features as specific embodiments of a particular invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments. Furthermore, although features may be described above as acting in a particular combination and even initially claimed in this way, one or more features from a claimed combination may be removed from the combination in some cases, and the claimed combination may involve sub-combinations or variations thereof.

Claims

1. A pulse capture component, comprising: A flow combiner conduit, the flow combiner conduit being formed from a single piece of continuous material, the flow combiner conduit comprising: -Middle section; - An inlet portion, the inlet portion having a first port communicating with the fluid supply of the intermediate portion and a second port communicating with the fluid supply of the intermediate portion, the second port being fluidly separated from the first port; and - An elbow section having a third port in communication with the fluid receiving section of the intermediate portion.

2. The pulse capture component according to claim 1, wherein: The first end of the first port has a first cross-sectional area; The second end of the first port near the middle portion has a second cross-sectional area smaller than the first cross-sectional area; and The central opening of the middle portion has a third cross-sectional area that is smaller than the first cross-sectional area and larger than the second cross-sectional area.

3. The pulse capture component according to claim 2, wherein, The ratio of the first cross-sectional area to the second cross-sectional area is between 1.25 and 1.

75.

4. The pulse capture component according to claim 2, wherein: The first end of the second port has a fourth cross-sectional area; The second end of the second port, near the middle portion, has a fifth cross-sectional area smaller than the fourth cross-sectional area; and The third cross-sectional area of ​​the central opening is smaller than the fourth cross-sectional area but larger than the fifth cross-sectional area.

5. The pulse capture component according to claim 2, wherein: The elbow portion defines a fluid flow path, and the fluid flow path has a fourth cross-sectional area that is larger than the third cross-sectional area.

6. The pulse capture assembly according to claim 5, wherein: The fluid flow path near the middle portion has a first cross-sectional shape, the first cross-sectional shape comprising: -First circular arc outline; - The second circular arc outline; and - A pair of straight profiles, the pair of straight profiles extending between the first arcuate profile and the second arcuate profile; and The fluid flow path has a second cross-sectional shape at its downstream end, and the second cross-sectional shape is substantially circular.

7. The pulse capture assembly according to claim 5, wherein: The first ratio of the first cross-sectional area to the fourth cross-sectional area is between 1.25 and 1.75; and The second ratio of the second cross-sectional area to the fourth cross-sectional area is between 0.75 and 1.

00.

8. The pulse capture component according to claim 1, wherein: The elbow portion defines a fluid flow path, which is defined by a flow path axis at a first end of the elbow portion near the middle portion and an outlet axis at a second end of the elbow portion opposite to the first end; and The angle between the fluid flow path and the outlet axis is between 160° and 200°, so that the direction of the fluid flow path changes between 160° and 200° through the bend.

9. The pulse capture assembly according to claim 1, wherein, The elbow portion defines a fluid flow path such that the fluid flow path is positioned lower at a first end of the elbow portion near the middle portion than at a second end of the elbow portion, the second end being opposite to the first end.

10. The pulse capture assembly according to any one of claims 1-9, further comprising: A bellows, which is positioned downstream of the flow combiner duct.

11. The pulse capture assembly of claim 10, further comprising: The mounting component is connected between the bend portion of the bellows and the flow combiner duct.

12. The pulse capture component according to claim 1, wherein: The bend defines a fluid flow path having a cross-sectional area, at least a portion of which near the middle portion increases at an angle between 160° and 200°.

13. An engine system comprising: Intake manifold; Engine, the engine being connected to the intake manifold fluid receiver; An exhaust manifold, which is connected to the engine fluid receiver; and A pulsation capture assembly, positioned below a plane defined by the top surface of the engine, the pulsation capture assembly including a flow combiner duct, the flow combiner duct comprising: -Middle section; - An inlet portion having (i) a first port communicating with the intermediate portion fluid supply and with the exhaust manifold fluid receiver, and (ii) a second port communicating with the intermediate portion fluid supply and with the exhaust manifold fluid receiver; and - The elbow section is connected to the fluid receiving section of the middle section and to the fluid supply section of the intake manifold.

14. The engine system according to claim 13, wherein, The flow combiner conduit is formed from a single piece of continuous material.

15. The engine system according to claim 13, wherein, The upstream end of the inlet section is located in front of the downstream end of the elbow section.

16. The engine system according to any one of claims 13-15, wherein: The first end of the first port has a first cross-sectional area; The second end of the first port near the middle portion has a second cross-sectional area smaller than the first cross-sectional area; and The central opening of the middle portion has a third cross-sectional area that is smaller than the first cross-sectional area and larger than the second cross-sectional area.

17. The engine system according to claim 16, wherein: The elbow portion defines a fluid flow path, and the fluid flow path has a fourth cross-sectional area that is larger than the third cross-sectional area.

18. The engine system according to any one of claims 13-15, wherein: The elbow portion defines a fluid flow path, which is defined by a flow path axis at a first end of the elbow portion near the middle portion and an outlet axis at a second end of the elbow portion opposite to the first end; and The angle between the fluid flow path and the outlet axis is between 160° and 200°, so that the direction of the fluid flow path changes between 160° and 200° through the bend.

19. The engine system according to any one of claims 13-15, wherein, The bend defines a fluid flow path such that the fluid flow path is positioned further away from the plane defined by the top surface of the engine at a first end of the bend near the middle portion than at a second end of the bend, the second end being opposite to the first end.

20. The engine system according to any one of claims 13-15, wherein: The elbow section defines the fluid flow path; The fluid flow path near the middle portion has a first cross-sectional shape, the first cross-sectional shape comprising: -First circular arc outline; - The second circular arc outline; and - A pair of straight profiles, the pair of straight profiles extending between the first arcuate profile and the second arcuate profile; and The fluid flow path has a second cross-sectional shape at its downstream end, and the second cross-sectional shape is substantially circular.

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