Patent ID: 7513441
Filing Date: 2009-04-07
Classification: F02M

Abstract:
1. A valve for controlling a connection in a high-pressure fluid system, in a fuel injection apparatus for an internal combustion engine, the valve having a valve member guided for sliding movement in the direction of a longitudinal axis of the valve member and protruding into a valve pressure chamber in which high pressure prevails at least some of the time, a sealing surface on the valve member in the valve pressure chamber at an end extending transversely in relation to the longitudinal axis of the valve member, the sealing surface of the valve member cooperating with a valve seat in the valve pressure chamber and extending transversely in relation to the longitudinal axis of the valve member in order, at least to a large extent, to close an opening encompassed by the valve seat in relation to the valve pressure chamber which opening is adjoined by a connection leading to a low-pressure region, and a pin on the valve member, the pin protruding into the connection and, when the sealing surface of the valve member is lifted away from the valve seat, this pin conveys fluid flowing out of the valve pressure chamber in such a way that the outgoing fluid exerts at least approximately no resulting force or only a slight resulting force on the valve member in the direction of the longitudinal axis, wherein the valve seat and/or the sealing surface on the valve member is embodied so that the distance between the sealing surface and the valve seat, starting from an outer edge of the valve member, first decreases as it extends radially inward toward the longitudinal axis of the valve member and then increases again as it continues to extend radially inward, as one of the valve seat or the sealing surface on the valve member is embodied by two regions that are inclined contrary to one another and adjoin one another directly, and the other of the valve seat or the sealing surface is embodied as a plane and is disposed at least approximately perpendicular to the longitudinal axis of the valve member.