Abstract: A helical compression spring for use in a component of a fuel injection system, for example a component in the form of a fuel injection valve, which helical compression spring has a spring wire cross section that corresponds to a rectangle in which the corners are rounded and the inner surface, which constitutes the inside of the helical compression spring, is curved in a sharply convex fashion. This cross sectional contour of the spring wire reduces the shearing stresses when the helical compression spring is loaded, as a result of which the helical compression spring can be embodied as shorter while retaining the same spring constant. The side surfaces of the spring wire, which are oriented toward each other in the helical compression spring, are embodied as at least approximately parallel to each other so that they rest against one another in a flat fashion at the ends of the helical compression spring due to the winding height that is reduced there.

Abstract: A helical compression spring (40) for use in a component (1) of a fuel injection system, for example a component in the form of a fuel injection valve (1), which helical compression spring (40) has a spring wire cross section that corresponds to a rectangle in which the corners are rounded and the inner surface (46), which constitutes the inside of the helical compression spring (40), is curved in a sharply convex fashion. This cross sectional contour of the spring wire reduces the shearing stresses when the helical compression spring (40) is loaded, as a result of which the helical compression spring (40) can be embodied as shorter while retaining the same spring constant (K).