Valve Needles for Electronically Operated Valves and Their Manufacturing Method (Ventiland fr ein elektromagnetisch betatighares ventil und verfahren zur herstellung)

摘要

In known electronically operated valves, the valve needle is composed of a mover of a tubular shape, a coupling pipe on a sleeve, and a valve closing member. In this case, the fuel flows inside the valve needle to reach the valve closing member, and then flows out in the direction of the valve seat through the lateral hole provided in the valve needle.;The valve needle 18 according to the present invention is advantageously manufactured as an integral component part by deep drawing forming of at least the valve needle section 19 and the valve closing member section 24 of the valve needle 18. [ In order to ensure the flow of fuel in the direction of the valve seat, for example, two pressing portions 61 are provided in the valve needle section 19, and the valve closing member section 24, which has a hemispherical shell shape, 25 are machined and formed. That is, the fuel flows along the outer circumferential surface of the needle segment 19 of the valve. The valve needle according to the present invention is particularly suitable for the fuel injection valve in the fuel injector of the spark-ignition internal combustion engine of the mixer compression type.