Apparatus for detecting leakage in a fuel rail

摘要

A method and apparatus are disclosed for detecting leakage in the fuel supply to the injectors of an engine in which the individual injectors are connected to a fuel supply rail to which fuel from a reservoir is supplied under pressure by a fuel pump. The pressure within the fuel rail is monitored and it is determined when a parameter of a pressure surge in the fuel supply rail resulting from a rapid transition from high to low engine load fails to reach a reference value.