| 摘要 |
In a fuel supply system ( 1 ), a fuel pressure regulating valve ( 11 ) disposed at a fuel outlet side of a low-pressure pump ( 3 ) in order to regulate the pressure of supply fuel from the low-pressure pump ( 3 ) to a predetermined pressure is housed inside a cylinder ( 31 ) such that a piston ( 32 ) is elastically urged by an elastic urging mechanism ( 33 ) toward a pressure receiving port ( 11 A), the piston ( 32 ) is configured such that the pressure of the fuel at the fuel outlet side is regulated as a result of the piston opening/closing an overflow port ( 11 B) disposed in a side wall portion of the cylinder ( 31 ) in response to the fuel pressure applied to the pressure receiving port ( 11 A), a lubrication fuel outlet port ( 11 C) for taking out fuel for lubrication is disposed in the side wall portion of the cylinder ( 31 ) at a position nearer to the pressure receiving port ( 11 A) than the overflow port ( 11 B), and lubricating-use fuel is taken out prior to the start of the pressure regulating operation.
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