Patent ID: 7726283
Filing Date: 2010-06-01
Classification: F02M

Abstract:
1. A pressure booster arrangement for high-pressure injection systems or high-pressure injection system parts of internal combustion engines, having a differential piston which operates with a large cross section thereof in a medium-pressure reservoir, and with partial cross sections thereof is operative in terms of positive displacement in an associated control chamber and work chamber that are separate from the medium-pressure reservoir and that are disposed in a guide body, the guide body guiding the differential piston in its strokes and in turn axially adjoining a valve body, the valve body receiving a control valve and a check valves for controlling communicating lines of the guide body and of the valve body for controllably connecting the control chamber and work chamber to the medium-pressure reservoir or to a relatively pressureless fluid reservoir, the valve body and the guide body being separate, wherein the guide body at least on its end remote from the valve body is acted upon by pressure in the medium-pressure reservoir, and the valve body and the guide body adjoin one another axially with respective end faces facing toward one another, and between the end faces, a spacer chamber or hollow chamber communicating with the relatively pressureless reservoir is embodied.