Patent Number: 6,305,359

Title: Fuel injection valve for internal combustion engines

Abstract: A fuel injection valve for internal combustion engines, having an axially movable valve member which, with its end oriented toward the combustion chamber, opens and closes a through flow cross section to at least one injection opening and which, with its end remote from the combustion chamber, protrudes into a fuel-filled spring chamber in which a valve spring is clamped, which acts on the valve member in the closing direction and is supported with its end remote from the valve member against a deflecting piston which, during the supply of high pressure fuel to the fuel injection valve, can be moved a certain distance into the spring chamber and thereby increases the initial stress force of the valve spring, and having a connecting conduit between the spring chamber and a low pressure fuel chamber. The connecting conduit between the spring chamber and the low pressure fuel chamber is embodied as a throttle bore in order to increase the injection opening pressure.

Inventors: Kronberger; Maximilian (Steyr, AT), Strahberger; Herbert (Gallneukirchen, AT)

Assignee: Robert Bosch GmbH

International Classification: F02M 61/00 (20060101); F02M 57/00 (20060101); F02M 57/02 (20060101); F02M 61/20 (20060101); F02M 45/08 (20060101); F02M 45/00 (20060101); F02M 63/00 (20060101); F02M 033/04 ()

Expiration Date: 10/23/2018