Fuel injection valve with semicircular flattenings

摘要

A fuel injection valve includes a valve-closure member which is provided with semicircular flattenings. The deflecting surfaces delimiting the flattenings and formed obliquely to the longitudinal valve axis cause a rotational energy to be applied to the fuel. The application of rotational energy to the fuel makes it possible to clearly reduce the change in flow rate caused by the rotational position of the needle, so that the variance in the static flow rate is considerably decreased. The valve is particularly suitable for application in fuel injection systems of mixture-compressing internal combustion engines having externally supplied ignition.