| 摘要 |
An exhaust gas recirculation pipe assembly 112 includes an inlet end fitting 125 for connection to an engine exhaust manifold, an outlet end fitting 127 for connection to an EGR control valve, with a flexible tube 135 having a convoluted portion 137 between end portions 136 attached to the end fittings 125 and 127. A liner tube 141 extends generally coaxially through the flexible tube 135 to conduct EGR flow from the inlet end fitting 125 to the outlet end fitting 127, one end being rigidly secured to an end fitting. The other end in close non-abutting proximity to the other end fitting. A substantial radial clearance or annular gap 151 between the liner tube 141 and the flexible tube 135 protects the flexible tube from the main flow of EGR gas and thus keeps the convoluted portion 137 below the temperatures at which hot salt corrosion tends to occur. |
