1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Part 3: Test measurementsICS 27.020Reciprocating internal combustion engines Performance BRITISH ST
2、ANDARDBS ISO 3046-3:2006BS ISO 3046-3:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2006 BSI 2006ISBN 0 580 48954 XCross-referencesThe British Standards which implement international publications referred to in this document may
3、 be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users ar
4、e responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 5 and a back cover.The
5、BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of organizations represented on this subcommittee can be obtained on request to its secretary. present to the responsible international/European
6、 committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.National forewordThis British Standard reproduces verbatim ISO 3046-3:2006 and implements it as the UK nation
7、al standard. It supersedes BS 5514-3:1990 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee MCE/14, Reciprocating internal combustion engines, to Subcommittee MCE/14/-/6, Performance, which has the responsibility to: aid enquirers to understand the text;
8、Reference numberISO 3046-3:2006(E)INTERNATIONAL STANDARD ISO3046-3Third edition2006-06-15Reciprocating internal combustion engines Performance Part 3: Test measurements Moteurs alternatifs combustion interne Performances Partie 3: Mesurages pour les essais BS ISO 3046-3:2006ii iiiForeword ISO (the I
9、nternational 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 subject for which a technical committee
10、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 (IEC) on all matters of electrotechnica
11、l standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bod
12、ies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any
13、 or all such patent rights. ISO 3046-3 was prepared by Technical Committee ISO/TC 70, Internal combustion engines. This third edition cancels and replaces the second edition (ISO 3046-3:1989), which has been technically revised. ISO 3046 consists of the following parts, under the general title Recip
14、rocating internal combustion engines Performance: Part 1: Declarations of power, fuel and lubricating oil consumption, and test methods Additional requirements for engines for general use Part 3: Test measurements Part 4: Speed governing Part 5: Torsional vibrations Part 6: Overspeed protection BS I
15、SO 3046-3:2006blank1Reciprocating internal combustion engines Performance Part 3: Test measurements 1 Scope This part of ISO 3046 specifies the common measurement techniques of the main performance parameters of reciprocating internal combustion engines, in addition to the basic requirements defined
16、 in ISO 15550. This is to ensure that the required accuracy of measurement is achieved for comparison of the measured values with those values specified by the engine manufacturer. Where necessary, individual requirements may be given for particular engine applications. This part of ISO 3046 applies
17、 to reciprocating internal combustion engines for land, rail-traction and marine use. It may be applied to engines used to propel road construction machines, industrial trucks, and for other applications where no suitable International Standards for these engines exist. 2 Normative references The fo
18、llowing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 15550:2002, Internal combustion engines Determinati
19、on and method for the measurement of engine power General requirements ISO 3046-1:2002, Reciprocating internal combustion engines Performance Part 1: Declarations of power, fuel and lubricating oil consumption, and test methods Additional requirements for engines for general use 3 Terms and definiti
20、ons For the purposes of this part of ISO 3046 the terms and definitions given in ISO 15550 apply. 4 Symbols For the symbols used in this part of ISO 3046, see Table 2 of ISO 15550. For subscript meanings, see Table 3 of ISO 15550. 5 Standard reference conditions The requirements Clause 5 of ISO 1555
21、0 apply. If an engine is tested using treated water (tcr= 29 C) then the resulting engine power established in accordance with 3.3.4 of ISO 15550 will be the same as if the engine had been tested using sea water (tcr= 25 C) or vice versa. BS ISO 3046-3:20062 For marine applications, the charge air c
22、oolant temperature (Tcr) for treated (fresh) water or sea water is defined as: Tcr= 302 K (tcr= 29 C) for treated (fresh) water; Tcr= 298 K (tcr= 25 C) for sea or raw water. Temperature Tcrtakes into account the influence of the coolant source. NOTE The charge air coolant temperatures given describe
23、 the influence of the coolant source at the air cooler inlet on supercharged engines. The engine designer and/or purchaser can select sea water or fresh water as the coolant. The charge air temperature after the cooler will be the same, whether sea water or fresh water is used. The air cooler shall
24、be specified by the engine designer according to the application coolant source. 6 Standard design conditions In marine applications supervised by a member body of the International Association of Classification Societies (IACS), the charge air coolant temperature for treated (fresh) water or sea or
25、 raw water is defined as: Tcr= 309 K (tcr= 36 C) for treated (fresh) water; Tcr= 305 K (tcr= 32 C) for sea or raw water. For nominal ambient conditions, see 11.4 of ISO 3046-1. The standard design conditions are the baseline to be used to establish the engine cooler capacity necessary to maintain th
26、e specified maximum charge air coolant temperature at the declared engine power established in accordance with the requirements of 3.3.4 of ISO 15550. NOTE Where IACS conditions are applied, the engine power remains unchanged when established in accordance with 3.3.4 of ISO 15550. 7 Requirements 7.1
27、 Measurement accuracy The requirements of 6.2.4.3.1 of ISO 15550 apply. 7.2 Operating conditions The requirements of 6.2.4.3.2 of ISO 15550 apply. 7.3 Measurement methods The requirements of 6.2.4.3.3 of ISO 15550 apply. 7.4 Permissible parameter deviation The requirements of 6.2.4.3.4 of ISO 15550
28、apply. BS ISO 3046-3:200637.5 Other regulations and requirements For engines used on board ships and offshore installations which have to comply with rules of a classification society, the additional requirements of the classification society shall be observed. If this applies, the classification so
29、ciety shall be stated by the customer before placing the order. For non-classed engines, such additional requirements are in each case subject to agreement between the manufacturer and customer. If special requirements from regulations of any other authority, for example inspecting and/or legislativ
30、e authorities, have to be met, the authority shall be stated by the customer before placing the order. Any further additional requirements for reference and/or design conditions shall be subject to agreement between the manufacturer and customer. 8 List of parameters The engine performance parameter
31、s measured during test are given in Table 4 of ISO 15550. Additional parameters are listed in Table 1. Table 1 List of parameters Parameter Definition Symbol Unit Permissible deviation Engine brake torque aMean torque delivered by the engine, measured at the extremity of the engine driving shaft. Ma
32、rine engines with a built in thrust bearing have no thrust load on the test bed. This is in contradiction to the torque measurements made on the propeller shaft on board ship. The engine designer may advise the customer of the torque absorbed in the thrust bearing. As a guide, a value of 0,5 % of th
33、e engine torque may be used. TtqkNm 2 % Boost pressure drop through the air cooler b, cThe pressure drop measured by a differential gauge at points before/after cooler as defined by the engine designer. pbakPa 10 % Lubricating oil pressure b, cOil pressure(s) measured at defined point(s) in the lubr
34、icating system(s) (e.g. in individual circuits, after the pump, before and after filters, coolers and gauge board). pokPa 5 % Charge air temperature d, eafter the pressure chargerAir temperature measured at the pressure charger outlet. TbK 4 K Lubricating oil temperature d, eOil temperature(s) measu
35、red at given point(s) in the lubricating system(s) (e.g. in individual circuits before and after cooler). ToK 2 K Fuel temperature d, eFuel temperature measured before the preheater and before the engine. TfK 5 K aMeasured by hydraulic brake, electric dynamometer or similar equipment. bThe permissib
36、le deviation of each pressure is given as a percentage of the gauge pressure. cThe unit bar may be used instead of kPa or MPa. dMeasured by electrical methods (resistance thermometers or a thermocouple with measuring apparatus) or fluid-type thermometers. eThe unit C may be used instead of K. BS ISO
37、 3046-3:20064 Annex A (informative) Example for calculating uncertainties A.1 Engine power The engine power is calculated from the torque and speed using Equation (A.1): tq9,549 3TnP= (A.1) where P is the engine power in kW; Ttqis the engine brake torque in kNm; n is the engine speed in revolutions
38、per minute. The torque and the speed are declared in accordance with the requirements of Table 4 of ISO 15550, each with a permissible deviation of 2 %. A.2 The total power uncertainty The total uncertainty in the engine power, A, is calculated using Equation (A.2): A = 22ab (A.2) where a is the per
39、missible deviation in engine brake torque; b is the permissible deviation in engine speed. A = 220,02 0,02+ = 0,028 3 % In Table 4, 1.5 of ISO 15550 the allowed engine power uncertainty is given as 3 %. A.3 Specific fuel consumption The specific fuel consumption is calculated from power and absolute
40、 fuel consumption using Equation (A.3): g = B/P (A.3) where g is the engine specific fuel consumption in g/kWh; BS ISO 3046-3:20065B is the engine absolute fuel consumption in kg/h; P is the engine power in kW. The absolute fuel consumption is declared in accordance with the requirements of Table 4,
41、 4.1 of ISO 15550 with a permissible deviation of 3 %. The engine power is declared in accordance with the requirements of Table 4, 1.5 of ISO 15550 with a permissible deviation of 3 %. The total uncertainty in the engine specific fuel consumption, B, is given by Equation (A.4): B = 22cd (A.4) where
42、 c is the permissible deviation in engine power; d is the permissible in absolute fuel consumption. B = 220,03 0,03+ = 0,042 4 % In ISO 15550, Table 4, 4.2, the total specific fuel consumption uncertainty is given as 3 %. To comply with the requirements of ISO 15550, measurement uncertainties for th
43、e absolute fuel consumption and engine power shall be selected so that the deviation of the final calculated specific fuel consumption complies with the permissible deviation of 3 %. BS ISO 3046-3:2006BS ISO BSI389 Chiswick High RoadLondonW4 4AL3046-3:2006BSI British Standards InstitutionBSI is the
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