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1、A Reference number ISO 4010:1998(E) INTERNATIONAL STANDARD ISO 4010 Second edition 1998-10-15 Diesel engines Calibrating nozzle, delay pintle type Moteurs diesels Injecteur dessai du type tton et tranglement ISO 4010:1998(E) ISO 1998 All rights reserved. Unless otherwise specified, no part of this p
2、ublication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 CH-1211 Genve 20 Switzerland Internetisoiso.ch Printe
3、d in Switzerland ii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a s
4、ubject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission
5、(IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International S
6、tandard ISO 4010 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 7, Injection equipment and filters for use on road vehicles. This second edition cancels and replaces the first edition (ISO 4010:1977), which has been technically revised to include method 2. Annex A of t
7、his International Standard is for information only. -,-,- INTERNATIONAL STANDARD ISOISO 4010:1998(E) 1 Diesel engines Calibrating nozzle, delay pintle type 1 Scope This International Standard specifies a nozzle intended for the testing and setting of injection pumps on injection pump test benches. I
8、t specifies the dimensions and test methods for determining the clearance at the “pintle” of the needle (method 1) and the clearance at the needle guide (method 2). The exact limit of the application of the calibrating nozzle depends upon the test values specified for the injection pump. The applica
9、bility is to be verified in each case by the pump manufacturer and stated on the pump test specification for each pump type. The typical range is up to 150 mm3/stroke. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of thi
10、s International Standard. At the time of publication, the edition indicated was 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 edition of the standard indicated bel
11、ow. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 2697:1), Road vehicles Fuel nozzles Size “S”. 3 Designation and marking The nozzle designation shall be marked on that part of the shank which protrudes beyond its cap nut. This designation is the number of
12、 this International Standard; i.e. ISO 4010. 4 Dimensions and tolerances Dimensions and tolerances are given in figure 1. All other dimensions of the nozzle, except the clearance at the needle guide, shall be as specified in ISO 2697 for type B. However, the two dowel holes are dropped. The clearanc
13、e of the needle in its guide shall be determined by the method given in 5.3. 1) To be published. (Revision of ISO 2697:1974) -,-,- ISO 4010:1998(E) ISO 2 Dimensions in millimetres Key 1Nozzle designation 2Annular groove 3Three holes Figure 1 Nozzle cross-section 5 Test methods 5.1 General All measur
14、ements of the following two test methods shall be performed on clean, dry nozzles. For the flow measurements, calibrated measuring devices with a measuring precision of 0,5 % of the value indicated shall be used. 5.2 Test method 1: Clearance at the “pintle” Method 1 measures the clearance between th
15、e needle protrusion (pintle) and the nozzle hole in the nozzle body by air flow. 5.2.1 Flow characteristics for air When measuring with the measuring installation given in figure 3, the calibrating nozzle shall achieve the control values given in table 1. -,-,- ISOISO 4010:1998(E) 3 Table 1 Control
16、values Needle liftFlow mmcm3/minl/h 0,1120 to 220 0,35 600 Lift at maximum flow228 to 238 End of lift210 to 220 The values indicated in table 1 are based on an ambient pressure pa of 0,98 bar2); an ambient air temperature ta of + 20 C. A characteristic course of the air flow versus the needle lift i
17、s shown in figure 2. Figure 2 Flow diagram 5.2.2 Measuring conditions The flow indicated by the measuring device is proportional to the effective cross-section of the nozzle, if sound velocity is reached in the effective cross-section and at the outlet of the nozzle. In order to ensure that this alw
18、ays happens in practice, a pressure (pe) of at least 0,6 bar2) below the ambient pressure (pa), shall always be available at the nozzle outlet when measuring. At the needle lifts of 0,1 mm and 0,35 mm the pressure at the nozzle outlet shall be at least 0,8 bar2) below the ambient pressure. 2) 1 bar
19、= 105 N/m2 ISO 4010:1998(E) ISO 4 The value indicated by the flowmeter depends upon the ambient conditions at the measuring site during the measurement (pressure, air temperature). To obtain comparable results, the reading of the flowmeter shall be corrected to the calibrating conditions of the flow
20、meter manufacturer. This corrected value shall, in addition, be corrected to the conditions of this International Standard upon which the diagram in figure 2 is based (pressure: 0,98 bar2); temperature: + 20 C) according to the laws of thermodynamics. 5.2.3 Measuring installation See figure 3. Key 1
21、Floating body flowmeter (example) 2Lift gauge 3Adjustable lifting device 4Vacuum gauge 5Bypass 6Stop-cock 7Vacuum reservoir 8Vacuum pump Figure 3 Measuring installation (schematic) with a floating body flowmeter ISOISO 4010:1998(E) 5 5.3 Test method 2: Clearance at the needle guide Method 2 determin
22、es the clearance of the needle within the nozzle body by the N2 gas-flow method. The schematic diagram of the measuring installation and the measuring conditions are shown in figure 4. The conditions for N2 gas flow are the following: pressure p: 20 bar 0,1 bar2); temperature t: + 20 C at nozzle ent
23、rance. The gas flow of new nozzles, as well as of used ones, shall be between 50 ml/min and 100 ml/min. NOTE It is recommended to repeat the measuring procedure for the clearance twice after, in each case, turning the needle within the nozzle body at about 120. All readings should be within the stat
24、ed tolerance. Key 1N2 gas 2Pressure gauge 3Thermometer 4Filter 5Flowmeter 6Atmospheric pressure Figure 4 Measuring installation for N2 gas-flow method (schematic) ISO 4010:1998(E) ISO 6 Annex A (informative) Bibliography 1ISO 7440-1:1991, Road vehicles Fuel injection equipment testing Part 1: Calibrating nozzle and holder assemblies. -,-,- ISO 4010:1998(E) ISO ICS 43.180 Descriptors: road vehicles, internal combustion engines, diesel engines, injection pumps, test equipment, fuel injectors, specifications, form specifications, dimensions, designation. Price based on 6 pages