Patent ID: 8840083
Filing Date: 2014-09-23
Classification: F02M,F04B

Abstract:
1. An intake valve for use with a cylinder of a high-pressure fuel pump of a common rail injection system, comprising: a valve body, which has a right angle cylindrical inlet opening having a longitudinal axis, the inlet opening surrounded by a first flat annular surface forming a first seal face perpendicular to the longitudinal axis of the inlet opening, and a closing body disposed to move along the longitudinal axis of the inlet opening, the closing body including a second flat annular surface disposed at a right angle to the longitudinal axis of the inlet opening, the second flat annular surface forming a second seal face which can be moved relative to the inlet opening, a cylindrical projection disposed on the closing body which protrudes into the cylindrical inlet opening, the cylindrical projection having a length along the longitudinal axis and a diameter smaller than the length of the cylindrical projection, wherein a first position of the closing body disposes the second seal face of the closing body in a sealing relationship against the first seal face of the valve body, wherein at least one of a contour of the closing body and a contour of the valve body defines the volumetric flow characteristic of the intake valve as non-linear, and wherein in a closed position of the closing body, the cylindrical inlet opening and the cylindrical projection of the closing body protruding into the cylindrical inlet opening define a gap having a constant width along the full length of the cylindrical projection.