| 摘要 |
PROBLEM TO BE SOLVED: To prevent low temperature brittle fracture of a common rail.SOLUTION: A common rail 1 is formed with a discharge passage 15 which extends along the longitudinal direction of the common rail, and fuel discharged via an orifice part 312 of a pressure reducing valve 3 is returned to a fuel tank 6 via the discharge passage 15. With this, when the fuel, which passes the orifice part 312 and is raised in temperature, passes through the discharge passage 15, the common rail 1 is warmed by the high temperature fuel and as a result, low temperature brittle fracture of the common rail 1 is prevented. |
