Patent Application
20210222659
The present application relates generally to vehicle fuel rail assemblies and, more particularly, to a structural fuel rail nozzle retention bracket to facilitate preventing relative movement between fuel rail assembly components.
Some vehicles include fuel rail assemblies for supplying fuel to an internal combustion engine. The fuel rail assemblies typically include a fuel line connected to an engine mounted fuel rail, which distributes fuel to a plurality of individual fuel injectors. In some high speed impact events, due to possible relative displacement between the fuel line and the engine/fuel rail, the fuel line can potentially become separated from the fuel rail, which may make it possible for fuel to leak from the fuel rail assembly. To prevent relative displacement between the engine and fuel line, some systems mount the fuel line directly to the engine block, thereby increasing cost, assembly time, and serviceability time. Thus, while such conventional systems do work well for their intended purpose, there remains a desire for improvement in the relevant art.
According to one example aspect of the invention, a fuel rail retention bracket for a fuel rail assembly having a fuel rail fluidly coupled to a fuel line is provided. In one example configuration, the fuel rail retention bracket includes a main body, a first connecting end configured to couple to the fuel rail, and a second connecting end configured to couple to the fuel line. The main body and first and second connecting ends are configured to prevent relative displacement between the fuel line and the fuel rail to maintain the coupling between the fuel rail and the fuel line.
In addition to the foregoing, the described fuel rail retention bracket may include one or more of the following features: wherein the main body and first and second connecting members are fabricated from a rigid material; wherein the main body and first and second connecting members are fabricated from a plastic nylon material; wherein the first connecting end is sized and shaped to interferingly clip to the fuel rail; wherein the first connecting end includes a pair of opposed semi-circular arms sized and shaped to removably fit around and grasp the fuel rail; wherein the second connecting end is sized and shaped to interferingly clip to the fuel line; and wherein the second connecting end includes a pair of opposed semi-circular arms sized and shaped to removably fit around and grasp the fuel line.
In addition to the foregoing, the described fuel rail retention bracket may include one or more of the following features: wherein the main body includes a first outer structural member coupled between the first and second connecting ends, a second outer structural member coupled between the first and second connecting ends, and an inner structural member disposed between the first and second outer structural members; wherein the main body further comprises a pair of vertical structural members coupled between the first and second outer structural members; wherein the main body further comprises a pair of angled structural members disposed between the pair of vertical structural members and the first and second outer structural members; wherein a first portion of the inner structural member is coupled to and extends between the first connecting end and a first vertical structural member of the pair of vertical structural members; and wherein a second portion of the inner structural member is coupled to and extends between the second connecting member and a second vertical structural member of the pair of vertical structural members.
According to another example aspect of the invention, a fuel rail assembly for a vehicle having an internal combustion engine is provided. In one example configuration, the fuel rail assembly includes a fuel rail configured to mount to the internal combustion engine, a fuel line fluidly coupled to the fuel rail, and a fuel rail retention bracket coupled between the fuel rail and the fuel line. The fuel rail retention bracket includes a main body, a first connecting end configured to couple to the fuel rail, and a second connecting end configured to couple to the fuel line. The main body and first and second connecting ends are configured to prevent relative displacement between the fuel line and the fuel rail to maintain the coupling between the fuel rail and the fuel line.
In addition to the foregoing, the described fuel rail assembly may include one or more of the following features: wherein the main body and first and second connecting members are fabricated from a rigid material; wherein the first connecting end is sized and shaped to interferingly clip to the fuel rail, and wherein the second connecting end is sized and shaped to interferingly clip to the fuel line; and wherein the first connecting end includes a pair of opposed semi-circular arms sized and shaped to removably fit around and grasp the fuel rail, and wherein the second connecting end includes a pair of opposed semi-circular arms sized and shaped to removably fit around and grasp the fuel line.
In addition to the foregoing, the described fuel rail assembly may include one or more of the following features: wherein the main body includes a first outer structural member coupled between the first and second connecting ends, a second outer structural member coupled between the first and second connecting ends, and an inner structural member disposed between the first and second outer structural members; wherein the main body further includes a pair of vertical structural members coupled between the first and second outer structural members, and a pair of angled structural members disposed between the pair of vertical structural members and the first and second outer structural members; and wherein a first portion of the inner structural member is coupled to and extends between the first connecting end and a first vertical structural member of the pair of vertical structural members, and wherein a second portion of the inner structural member is coupled to and extends between the second connecting member and a second vertical structural member of the pair of vertical structural members.
Further areas of applicability of the teachings of the present disclosure will become apparent from the detailed description, claims and the drawings provided hereinafter, wherein like reference numerals refer to like features throughout the several views of the drawings. It should be understood that the detailed description, including disclosed embodiments and drawings references therein, are merely exemplary in nature intended for purposes of illustration only and are not intended to limit the scope of the present disclosure, its application or uses. Thus, variations that do not depart from the gist of the present disclosure are intended to be within the scope of the present disclosure.
The present application is directed to a vehicle fuel rail assembly having a structural support or retention bracket coupled between a fuel rail and a fuel line. The support bracket is coupled between the fuel rail and the fuel line to prevent relative displacement therebetween, thereby facilitating preventing leaks that can occur if the fuel rail and the fuel line are separated during an impact event. The support bracket can be quickly added or removed by hand, thereby providing easy serviceability and reduced assembly effort than compared to direct mounting of the fuel line to the engine.
Referring now to the drawings,
In the example embodiment, engine 12 is configured to draw air into an intake manifold 18 through an induction system 20 regulated by a throttle 22. The air in the intake manifold is distributed to the cylinders 16 and combined with fuel to create an air/fuel mixture that is subsequently compressed and combusted within the cylinders 16 to drive pistons (not shown) that rotatably turn a crankshaft 24 to generate drive torque. The drive torque is then transferred to a drivetrain (not shown) to propel a vehicle. Exhaust gas resulting from combustion is expelled from the cylinders 16 into an exhaust system 26 configured to treat the exhaust gas before releasing it to the atmosphere.
In the example implementation, the fuel system 14 generally includes a fuel tank 30, a fuel pump 32, a fuel rail assembly 34, a fuel rail pressure sensor 36, and plurality of fuel injectors 38. In one implementation, the fuel system 14 can be a variable pressure fuel system. The fuel rail assembly 34 generally includes a fuel line 40 fluidly coupled to a fuel rail 42, for example, via a quick connect 44 (
The fuel injectors 38 are configured to be periodically opened to inject fuel from the fuel rail 42 into the engine 12. The injection point of the fuel injectors 38 depends on the type of engine 12 (e.g., DI, PFI, etc.). For example, in a DI engine the fuel injectors 38 are configured to inject fuel directly into the cylinders 16, whereas in a PFI engine the fuel injectors 38 are configured to inject fuel via intake ports of the cylinders 16. It will be appreciated that the fuel system 14 can include any other suitable components that enable engine system 10 to operate as described herein. For example, the fuel system 14 may include a fuel tank sensor and/or a pressure relief valve configured to selectively decrease the fuel rail pressure in order to prevent damage to the fuel rail 42.
A controller 50 can control operation of the engine system 10. Specifically, the controller 50 can control the engine 12 to generate a desired torque in response to a torque request from a driver of the vehicle. The torque request can be based on input from the driver via a driver interface 52 such as, for example, an accelerator pedal. As used herein, the term controller refers to an application specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory that executes one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that provide the described functionality.
Turning now to
With additional reference to
In the example embodiment, the main body 82 generally includes an inner structural beam or member 88 disposed between opposed outer structural beams or members 90, 92, a pair of vertical structural beams or members 94, 96, and a pair of angled structural beams or members 98, 100. A first portion 88a of the inner structural member 88 is coupled to and extends between the first connecting end 84 and the vertical structural member 94, and a second portion 88b of the inner structural member 88 is coupled to and extends between the second connecting end 86 and the vertical structural member 96.
The outer structural member 90 is coupled to and extends between the first connecting end 84 and the second connecting end 86. Similarly, the outer structural member 92 is coupled to and extends between the first connecting end 84 and the second connecting end 86. The first angled structural member 98 is coupled to and extends between an interface between the outer structural member 90 and the vertical structural member 94, and an interface between the outer structural member 92 and the vertical structural member 96. The second angled structural member 100 is coupled to and extends between an interface between the outer structural member 90 and the vertical structural member 96, and an interface between the outer structural member 92 and the vertical structural member 94. As such, main body 82 defines a truss structure configured to provide support between the fuel rail 42 and fuel line 40 and facilitate absorbing forces and preventing separation/buckling of the main body 82 during an impact event. It will be appreciated, however, that the truss structure of main body 82 may have various arrangements depending on various vehicle specific details such as various vehicle designs, various vehicle components, packaging space, impact load, etc.
With continued reference to
Described herein are systems and methods for preventing relative movement between a fuel rail and fuel line, particularly during an impact event. A selectively removable structural clip or bracket is coupled to and secured between the fuel rail and the fuel line to maintain the fluid connection between the fuel rail and fuel line. As such, the structural bracket does not couple to any other vehicle components such as the cylinder head. The structural bracket is a rigid member configured to withstand impact forces, prevent buckling, and prevent relative displacement of the fuel rail/fuel line to prevent shearing of a quick connect between the fuel line and fuel rail.
It should be understood that the mixing and matching of features, elements and/or functions between various examples may be expressly contemplated herein so that one skilled in the art would appreciate from the present teachings that features, elements and/or functions of one example may be incorporated into another example as appropriate, unless described otherwise above.
