ISO 19724:2016 pdf free
ISO 19724:2016 pdf free.Gasoline engines with direct injection一Cleanliness assessment of fuel injection equipment
All tests shall be carried out in a clean laboratory environment. Failure to achieve a satisfactory blank test level of contamination could indicate unsuitable control of test conditions. Clean room conditions according to ISO 14644-1, class 8, are recommended as a minimum for these procedures.
The appropriate method to determine the required amount of fluid is by use of an extraction curve, as described in ISO 16232-3:2007, 6.2 and ISO 16232-5:2007, 6.2 (see also ISO 16232-3:2007, Figure 1 and ISO 16232-3:2007, Figure 1). In order to avoid each laboratory finding a different amount of fluid to be required, a guideline for the volume is given here for each component.
The blank tests described in ISO 16232- 3:2007, 6.3 and ISO 16232-5:2007, 6.3, are important procedures to check the quality of the laboratory equipment and shall be carried out once a week.
Before starting the test procedure, the outer surface of the component or assembly shall be thoroughly cleaned by using a fluid like for the cleanliness assessment.
This document covers the following components of the fuel injection equipment:
一high pressure pump;
一injector;
一rail;
一high pressure pipe;
一high pressure sensor.
This test method refers to ISO 16232-5. The test of the high pressure pump shall be carried out by operating the pump on a functional test bench close to the conditions of the engine. This concerns, for example, plunger stroke, driving frequency, fuel flow. The pump under test is assembled to a cam box and driven by an electric motor.
The injector shall be operated by applying the electrical energising like at the engine. The resulting vibrations and pressure pulsations are considered to be essential for removing the contamination and bringing it out of the injector. The injection period (energising time) may be increased to about 90 % of the total cycle in order to get a high through flow to wash the particles out and to reach the required fluid quantity in an appropriate time.
The flow direction shall be reverse to the injection direction (with the internal fuel filter removed) in order to ensure that the orifices of the injector will not retain any particles. Only for such types of injectors where the internal filter cannot be removed that the normal flow direction shall be applied.ISO 19724 pdf free download.
