ISO INTERNATIONAL 3046-3 STANDARD Third edition 2006-06-15 Reciprocating internal combustion enginesPerformance: Part 3: Test measurements Moteurs alternatifsa combustion interne-Performances- Partie3:Mesuragespourlesessais Reference number ISO 3046-3:2006(E) TSO ii Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies non-governmental, in liaison with isO, also take part in the work. iso collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization The main task of technical committees is to prepare International Standards. 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 memberbodies casting a vote. 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 Reciprocating internal combustion engines - Performance: Part1:Declarations of power,fuel and lubricating oil consumption, and test methods -Additional requirementsforenginesforgeneraluse Part3:Test measurements Part 4:Speed governing Part 5:Torsional vibrations Part6:Overspeedprotection ii blank ReciprocatinginternalcombustionenginesPerformance- Part 3: Test measurements 1 Scope This part of isO 3046 specifies the common measurement techniques of the main performanceparameters of toensurethattherequiredaccuracyof measurementisachievedforcomparisonofthe measuredvalueswith for particular engine applications. This part of isO 3046 applies 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. Normative references The following 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-Determination and method for the measurement of engine power-Generalrequirements fuelandlubricating oil consumption,andtestmethodsAdditional requirementsforenginesforgeneraluse 3Terms and definitions For the purposes of this part of ISO 3046 the terms and definitions given in ISO 15550 apply. Symbols For the symbols used in this part of iSO 3046, see Table 2 of iSO 15550. For subscript meanings, see Table 3 ofiSO15550. 5Standard referenceconditions TherequirementsClause5of IsO15550apply (tcr = 25 °C) or vice versa. 1 For marine applications, the charge air coolant temperature (Tcr) for treated (fresh) water or sea water is definedas Tcr = 302 K (tcr = 29 C) for treated (fresh) water; Temperature Tcrtakes intoaccount the influence of the coolant source. NOTE The charge air coolant temperatures given describe the influence of the coolant source at the air cooler inlet charge air temperature after the cooler will be the same, whether sea water or fresh water is used. The air cooler shall 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 raw water is defined as: Tcr = 305 K (tcr = 32 °C) for sea or raw water. Fornominal ambient conditions, see 11.4ofisO 3046-1. 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 Measurement accuracy The requirements of 6.2.4.3.1 of ISO 15550 apply. 7.