| 摘要 |
A common rail has an accumulation pipe in which high pressure fuel is accumulated, a pipe joint to which a high pressure pipe is connected and an orifice member housed inside the pipe joint. The orifice member is provided with a conduit through which a fuel port formed in the accumulation pipe communicates with the high pressure pipe. The conduit is provided at an end thereof with an orifice. The orifice serves to reduce pressure pulsation generated by fuel injection of an injector so that fuel pressure in the common rail is stable. Since the orifice is formed in the orifice member housed in the pipe joint, the orifice is easily and accurately manufactured at a lower cost, compared to an orifice formed in the accumulation pipe. It is easy to standardize the manufacture of plural models of common rails whose orifice diameters are different.
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