Patent ID: 6536405
Filing Date: 2003-03-25
Classification: F02M

Abstract:
A fuel injector associated with an integrated spark plug for injecting a fuel directly into a combustion chamber of an internal combustion engine and for igniting the fuel that is injected into the combustion chamber, comprising:a valve-closure member; a valve body forming with the valve-closure member a sealing seat to which a discharge orifice that discharges at a level end face of the valve body facing the combustion chamber is contiguously disposed; a housing body insulated from the valve body; and a plurality of pin-shaped ignition electrodes provided at the housing body to produce a spark arc-over between the valve body and the plurality of pin-shaped ignition electrodes; wherein the plurality of pin-shaped ignition electrodes and the valve body are formed so that a spark arc-over occurs between the level end face of the valve body and the plurality of pin-shaped ignition electrodes; wherein at least one of the level end face of the valve body and the plurality of pin-shaped ignition electrodes include an edge in a vicinity of the discharge orifice to reproducibly define a position of the spark arc-over at the level end face of the valve body with respect to a position of the discharge orifice; and wherein the housing body includes a mount fixture that projects over the level end face of the valve body and to which the plurality of pin-shaped ignition electrodes are secured so as to be tilted at a predefined inclination angle toward the level end face of the valve body; and wherein one edge of each of the plurality of pin-shaped ignition electrodes opposes the level end face of the valve body.