Patent ID: 7559296
Filing Date: 2009-07-14
Classification: F01P,Y10T

Abstract:
1. A piston cooling sprayer for internal combustion engines, including a sprayer body with an axial passage through it in which are accommodated a tubular guide liner with an axial passage through it and a valve that cooperates with a main seat and a return spring, the sprayer body having an upstream section conformed to be connected to an engine cooling fluid feed passage, an intermediate section with at least one radial outlet passage and one fluid outlet tube, and a downstream retaining section, the tubular guide liner being fixed coaxially in the axial through-passage and having an upstream section leaving a peripheral space for the axial passage of fluid between its external surface and the internal surface of the axial through-passage and between the main seat and the radial outlet passage, the valve sliding axially in the axial passage through the tubular guide liner toward and away from the main seat and being urged axially toward the main seat by the return spring accommodated in the axial passage through the tubular guide liner, wherein: the main seat is formed in the mass of the sprayer body by a shoulder in the axial through-passage, the tubular guide liner comprises a downstream liner section fixed in the downstream retaining section of the sprayer body beyond the radial outlet passage, the upstream section of the tubular guide liner terminates in an upstream end that is axially set back from the main seat, in the downstream direction, to define an annular fluid passage between the main seat and the peripheral space.