| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel filter capable of filtering fuel, and discharging fuel additive agent into the fuel at a controlled speed. SOLUTION: This fuel filter includes fuel additive agent 42 to be discharged into fuel. A discharge speed to fuel is controllable. The fuel additive agent 42 is positioned inside an inner chamber 40 to be constantly fluid-communicated with fuel in the filter through an opening part limited by a baffle plate 50 and/or a diffusion orifice 44. In a modified example, the opening part after the inner chamber can be controlled by a thermostat for limiting flow of fuel to the fuel additive agent 42. In the mode of the modified example, the fuel additive agent can be discharged substantially at a constant speed for uniformly maintaining the level of the fuel additive agent in the fuel. In this invention, a fuel filter of a longer life than a fuel filter representatively used in a fuel engine can be provided.
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