LIQUEFIED GAS FUEL SUPPLY DEVICE FOR DIESEL ENGINE

摘要

PROBLEM TO BE SOLVED: To reduce degradation of lubrication performance of lubricating oil due to liquefied gas fuel leaking out to a cam chamber of an injection pump. SOLUTION: A bypass control part 30 performs ON/OFF control of a three-way solenoid valve 62 based on a detection value of a cam chamber inside sensor 12a. When a detection value of viscosity of lubricating oil detected by the cam chamber inside sensor 12a exceeds a predetermined allowance, the three-way solenoid valve 62 is controlled and is turned on to make an outlet side of an oil separator 13 communicate to the bypass passage 61. Inside of the cam chamber 12 is decompressed below atmospheric pressure by sucking by a compressor under a condition that a check valve 14 regulating pressure in the cam chamber above atmospheric pressure is bypassed. When the detection value of viscosity of lubricating oil which the cam chamber inside sensor 12a outputs gets the predetermined allowance or less, the three-way solenoid valve 62 is turned off, the outlet side of the oil separator 13 communicates to the check valve 1 side and the bypass passage 61 is shut off. COPYRIGHT: (C)2005,JPO&NCIPI