| 摘要 |
Manifold pipe assemblies and exhaust manifold assemblies, optionally in combination with internal combustion engines, for receiving hot gases from such heat source, and conveying such hot gases from the heat source toward a lower temperature environment. Such manifold pipe assembly comprises a manifold pipe defining a gas path for conveying hot gases from an inlet end to an outlet end, a jacket pipe encompassing the manifold pipe along a portion of the length of the manifold pipe. The jacket pipe has a second inlet end disposed toward the inlet end of the manifold pipe, and a second outlet end disposed toward the outlet end of the manifold pipe. The jacket pipe is closed about the manifold pipe at the second inlet end, to form a closed cooling chamber between the manifold pipe and the jacket pipe. An inlet pipe conveys cooling liquid into the cooling chamber. A closed end chamber portion of the cooling chamber is defined optionally between the inlet pipe and a face of the cooling chamber disposed toward the manifold end of the manifold pipe, sufficiently close to the inlet end of the cooling chamber in combination with the closed end chamber portion being suitably configured, as to maintain sufficient flow of cooling liquid at the inlet end, into and through the closed end chamber portion, to preclude development of localized hot spots on the manifold pipe adjacent the cooling chamber when cooling water is routinely passing through the cooling chamber during routine operating conditions of the pipe assembly. Some embodiments preferably include an enlarged section of the cooling chamber proximate or at the inlet end of the cooling chamber, which acts as an accumulation reservoir for increasing residence time of the cooling liquid therein, thereby to absorb additional heat from the manifold pipe adjacent the inlet end of the cooling chamber.
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