Assembly for connecting double high pressure wall line to a single-walled high pressure connector

摘要

This disclosure provides a fuel line assembly for use with an internal combustion engine, an internal combustion engine including such as fuel line assembly, and a method for providing leak containment and detection in a fuel system, each of which include a double-walled fuel line including a high pressure fuel line component. The double-walled fuel line includes a high pressure fuel line, a jacket surrounding the high pressure fuel line, and a low pressure passage between the high pressure fuel line and the jacket. A fuel line nut includes a main body that houses a portion of the high pressure fuel line, and a first end portion supporting an enlarged end portion of the high pressure fuel line protruding from the first end portion. A second end portion of the fuel line nut sealingly connects to the jacket to extend the low pressure passage into an area between the main body and the housed high pressure fuel line. A fuel line connector mechanically and sealingly engages with the fuel line nut to house the supported enlarged end portion of the high pressure fuel line. The fuel line connector can connect to a single-walled high pressure tube provided in a bore of the cylinder head between an inlet of a fuel injector and the environment exterior of the cylinder head.

主权项

1. A fuel line assembly for supplying fuel to an internal combustion engine, comprising:
a double-walled fuel line including a high pressure fuel line, a jacket surrounding the high pressure fuel line, and a low pressure passage between the high pressure fuel line and the jacket; a fuel line nut including a main body that houses a portion of the high pressure fuel line, said fuel line nut including a first end portion supporting an enlarged end portion of the high pressure fuel line protruding from the first end portion and a second end portion sealingly connected to the jacket to extend the low pressure passage into an area between the main body and the housed high pressure fuel line; a fuel line connector mechanically and sealingly engaged with the fuel line nut to house the supported enlarged end portion of the high pressure fuel line; a single-walled high pressure connector tube including a central axis, a first end portion fluidly connected with the enlarged end portion of high pressure fuel line, a second end portion for sealingly engaging a fuel injector inlet port, and a pivoting element positioned between the first and second end portions and extending outwardly from the central axis; and a clamp nut including a portion for securing the single-walled high pressure connector tube within a bore in a cylinder head of an internal combustion engine via an end portion applying force to the pivoting element and urging the second end portion of the single-walled high pressure connector tube into the sealing engagement with a fuel injector inlet port of the injector; wherein the fuel line connector mechanically fastens to the first end portion of the single-walled high pressure connector tube, but not to the clamp nut, to allow pivoting the single-walled high pressure connector at the interface with the pivoting element.