1、BRITISH STANDARD BS ISO 4010:1998 Diesel engines Calibrating nozzle, delay pintle type ICS 43.060.40BSISO 4010:1998 This British Standard, having been prepared under the directionof the Engineering SectorCommittee, was publishedunder the authority ofthe Standards Committee andcomes into effect on 15
2、December 1998 BSI 05-1999 ISBN 0 580 30928 2 National foreword This British Standard reproduces verbatim ISO4010:1998 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical CommitteeMCE/22, Engines for road vehicles, which has the responsibi
3、lity to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list o
4、f organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International
5、Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British S
6、tandard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO title page, pages ii to iv, pages 1 to 6 and a back cover. This standard has been updated (see copyright date) and may have had ame
7、ndments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO 4010:1998 BSI 05-1999 i Contents Page National foreword Inside front cover Foreword iii Text of ISO 4010 1ii blankBSISO 4010:1998 ii BSI 05-1
8、999 Contents Page Foreword iii 1 Scope 1 2 Normative reference 1 3 Designation and marking 1 4 Dimensions and tolerances 1 5 Test methods 2 Annex A (informative) Bibliography 6 Figure 1 Nozzle cross-section 2 Figure 2 Flow diagram 3 Figure 3 Measuring installation (schematic) with a floating body fl
9、owmeter 4 Figure 4 Measuring installation for N 2gas-flow method (schematic) 5 Table 1 Control values 3BSISO 4010:1998 BSI 05-1999 iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing I
10、nternational Standards is normally carried out through ISO technical committees. Each member body interested in a subject 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
11、 with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication a
12、s an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO 4010 was prepared by Technical Committee ISO/TC22, Road vehicles, SubcommitteeSC7, Injection equipment and filters for use on road vehicles. This second edition cancels and re
13、places the first edition (ISO4010:1977), which has been technically revised to include method2. Annex A of this International Standard is for information only. Descriptors: Road vehicles, internal combustion engines, diesel engines, injection pumps, test equipment, fuel injectors, specifications, fo
14、rm specifications, dimensions, designation.iv blankBSISO 4010:1998 BSI 05-1999 1 1 Scope This International Standard specifies a nozzle intended for the testing and setting of injection pumps on injection pump test benches. It specifies the dimensions and test methods for determining the clearance a
15、t the “pintle” of the needle (method1) and the clearance at the needle guide (method2). The exact limit of the application of the calibrating nozzle depends upon the test values specified for the injection pump. The applicability is to be verified in each case by the pump manufacturer and stated on
16、the pump test specification for each pump type. The typical range is up to150mm 3 /stroke. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated w
17、as 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 below. Members of IEC and ISO maintain registers of currently valid Internationa
18、l Standards. ISO 2697:, Road vehicles Fuel nozzles Size “S” 1) . 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 this International Standard; i.e.ISO4010. 4 Dimensions and tolerances Dime
19、nsions and tolerances are given inFigure 1. All other dimensions of the nozzle, except the clearance at the needle guide, shall be as specified in ISO2697 for type B. However, the two dowel holes are dropped. The clearance of the needle in its guide shall be determined by the method given in5.3. 1)
20、To be published. (Revision of ISO2697:1974)BSISO 4010:1998 2 BSI 05-1999 5 Test methods 5.1 General All measurements 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 ind
21、icated shall be used. 5.2 Test method 1: Clearance at the “pintle” Method 1 measures the clearance between the needle protrusion (pintle) and the nozzle hole in the nozzle body by air flow. Figure 1 Nozzle cross-sectionBSISO 4010:1998 BSI 05-1999 3 5.2.1 Flow characteristics for air When measuring w
22、ith the measuring installation given inFigure 3, the calibrating nozzle shall achieve the control values given inTable 1. Table 1 Control values The values indicated inTable 1 are based on an ambient pressure p aof0,98bar 2) ; an ambient air temperature t aof+20 C. A characteristic course of the air
23、 flow versus the needle lift is shown inFigure 2. 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 t
24、his always happens in practice, a pressure (p e ) of at least 0,6 bar 2)below the ambient pressure (p a ), shall always be available at the nozzle outlet when measuring. Needle lift Flow mm cm 3 /min l/h 0,1 120 to 220 0,35 600 Lift at maximum flow 228 to 238 End of lift 210 to 220 2) 1 bar = 10 5N/
25、m 2 Figure 2 Flow diagramBSISO 4010:1998 4 BSI 05-1999 At the needle lifts of0,1mm and0,35mm the pressure at the nozzle outlet shall be at least0,8bar 2)below the ambient pressure. The value indicated by the flowmeter depends upon the ambient conditions at the measuring site during the measurement (
26、pressure, air temperature). To obtain comparable results, the reading of the flowmeter shall be corrected to the calibrating conditions of the flowmeter manufacturer. This corrected value shall, in addition, be corrected to the conditions of thisInternational Standard upon which the diagram inFigure
27、 2 is based (pressure:0,98bar 2) ; temperature: +20 C) according to the laws of thermodynamics. 5.2.3 Measuring installation SeeFigure 3. Figure 3 Measuring installation (schematic) with a floating body flowmeterBSISO 4010:1998 BSI 05-1999 5 5.3 Test method 2: Clearance at the needle guide Method 2
28、determines the clearance of the needle within the nozzle body by the N 2gas-flow method. The schematic diagram of the measuring installation and the measuring conditions are shown inFigure 4. The conditions for N 2gas flow are the following: pressure p:20bar 0,1 bar 2) ; temperature t:+20 C at nozzl
29、e entrance. The gas flow of new nozzles, as well as of used ones, shall be between50ml/min and100ml/min. NOTEIt is recommended to repeat the measuring procedure for the clearance twice after, in each case, turning the needle within the nozzle body at about120 . All readings should be within the stat
30、ed tolerance. Figure 4 Measuring installation for N 2gas-flow method (schematic)BSISO 4010:1998 6 BSI 05-1999 Annex A (informative) Bibliography 1 ISO 7440-1:1991, Road vehicles Fuel injection equipment testing Part 1: Calibrating nozzle and holder assemblies.7 blankBS ISO 4010:1998 BSI 389 Chiswick
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