ISO 14681 pdf download

ISO 14681 pdf download.Diesel engines — Fuel injection pump testing — Calibrating fuel injectors 1 Scope This International Standard specifies two types of calibrating injectors intended for testing and setting diesel fuel injection pumps on test benches. It applies to a) calibrating injectors for different orifice plates, max. delivery range 400 mm³/stroke; b) calibrating injectors with pintle type nozzle, max. delivery range 200 mm³/stroke. The field of application is similar to the calibrating injectors specified in ISO 7440-1 and to the calibrating nozzle specified in ISO 401 0. Compared to the calibrating injector specified in ISO 7440-1 , the calibrating injectors specified in this International Standard represent an advanced stage of design which is more appropriate to modern high pressure/high performance fuel injection systems. Specification of the type of calibrating fuel injectors to be used, the appropriate single hole orifice plate size or pintle nozzle (as applicable), high pressure pipes, exact limits, etc. is left to the manufacturer of the injection equipment and/or the manufacturer of the engine. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 401 0:— 1 ) , Diesel engines — Calibrating nozzle, delay pintle type. ISO 41 1 3:1 988, Road vehicles — Calibration fluid for diesel injection equipment. ISO 7440-1 :1 991 , Road vehicles — Fuel injection equipment testing — Part 1 : Calibrating nozzle and holder assemblies. ISO 7440-2:1 991 , Road vehicles — Fuel injection equipment testing — Part 2: Orifice plate flow-measurement. 3 Requirements 3.1 Calibrating fuel injectors 3.1.1 With single hole orifice plate The two alternative designs of the calibrating fuel injectors with the single hole orifice plate specified in figure 1 1 are shown in figure 1 . 3.1.2 With delay pintle type nozzle The two alternative designs of the calibrating fuel injectors with the delay pintle type nozzle specified in figure 1 4 are shown in figure 2. 3.2 Components The calibrating fuel injectors consist of the components specified in 3.2.1 to 3.4.2 with their functionally critical dimensions. 3.2.1 Holder body...