Patent ID: 8287256
Filing Date: 2012-10-16
Classification: F02B,F02M,F04B,F05C,Y10T

Abstract:
1. A valve assembly received within an aperture of a high-pressure pump, wherein the aperture defines a pump aperture sealing surface, and wherein the high-pressure pump includes a fuel inlet passage and a fuel outlet passage, the valve assembly comprising: an actuator actuatable in response to an input signal; a valve element moveable between an open position and a closed position, the valve element including a body and a head, the head including a valve element sealing surface; a valve guide including a first end and a second end, a valve guide aperture having a first region proximate the first end and a second region proximate the second end, and a flow passage between the second region of the valve guide aperture and an external surface of the valve guide proximate the second end, the first region of the valve guide aperture closely receiving the body of the valve element to minimize fluid leakage from the first region, the second end including a recess defined by a radial surface and an axial surface, and the flow passage being configured to allow fluid to flow through the valve guide; an insert disposed within the recess at the second end of the valve guide and including a valve face, a guide face and an inner surface defining an opening through the insert; and a connector including an aperture extending longitudinally through the connector and receiving the valve guide and valve element therein, and an external surface engaged by a portion of a surface defining the aperture of the high pressure pump to align the valve guide and valve element within the aperture of the high pressure pump such that the valve face engages the pump aperture sealing surface to form a first sealed interface, the guide face engages the radial surface of the valve guide to form a second sealed interface, and wherein the flow passage, the second region of the valve guide aperture and the opening of the insert defined by the inner surface define a flow chamber placing the fuel inlet passage in fluid communication with the fuel outlet passage; wherein the actuation of the actuator causes the valve element to move from the open position in which the valve element sealing surface is disengaged from the valve face to allow fluid flow from the fuel inlet passage through the flow chamber to the fuel outlet passage to the closed position in which the valve element sealing surface engages the valve face to prevent fluid flow through the flow chamber to the fuel outlet passage.