| 摘要 |
PROBLEM TO BE SOLVED: To solves problems of generation of an accelerating shock at the time of reaccelerating an engine, deterioration of emission increase of noise, etc., by improving decompression responsibility of an accumulator container in case of using a hydraulic control valve of a two-way valve type for an accumulator fuel injection device. SOLUTION: A pressure control device 11 furnished with a valve body 43 to be operated to open and close by a solenoid coil 49 is installed on a common rail 5 which is an accumulator container to store fuel pressurized in high pressure. The valve body 43 is energized in the valve closing position by a comparatively weak valve spring 44. A balance rod 54 is provided in the valve body 43, a balance pressure chamber 55 communicated to a control port 52 by a communicating passage 56, and a drain port 47 is provided. A diameter of the balance rod 54 is set smaller than a valve seat part 46 of the control port 52, a valve opening tendency is given concerning hydraulic working force, and a fail-safe function to release excessive pressure is provided. |
