Diesel internal-combustion engine diagnosing and/or controlling method, involves determining whether pressure difference of injection interval in opening phase and/or injection interval in closing phase exceeds preset value

摘要

The method involves reducing a preset cross-section of a blowhole of a fuel injection system (2). Corrective measures are introduced into the fuel injection system working with accumulator pressure, based on changes of flow rate. A determination is made whether pressure difference of injection and/or injection interval in a ballistic opening phase of a nozzle needle and/or injection interval in a ballistic closing phase of the nozzle needle exceeds a preset limit value with respect to usage condition of an injection nozzle (4) while injecting fuel i.e. diesel.