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GB/T 28239-2020: Limits and Measurement Methods for Non-road Diesel Engine Specific Fuel Consumption Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 28239: Historical versions
Similar standardsGB/T 28239-2020: Limits and Measurement Methods for Non-road Diesel Engine Specific Fuel Consumption---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT28239-2020 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.020 J 91 Replacing GB/T 28239-2012 Limits and Measurement Methods for Non-road Diesel Engine Specific Fuel Consumption ISSUED ON: APRIL 28, 2020 IMPLEMENTED ON: NOVEMBER 1, 2020 Issued by: State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative References ... 5 3 Terms and Definitions ... 5 4 Standard Reference Status ... 6 5 Specific Fuel Consumption Evaluation Index ... 6 6 Diesel Engine Lineage and Source Engine ... 7 7 Limits of Weighted Specific Fuel Consumption ... 7 8 Test Methods ... 8 9 Production Consistency Inspection ... 12 10 Test Report ... 13 Appendix A (normative) Equipment and Auxiliary Devices to be Installed in Total Power Measurement of Non-road Diesel Engines ... 15 Appendix B (normative) A Description of Characteristics of Diesel Engine Lineage Source Engine ... 18 Appendix C (normative) A List of Models in Diesel Engine Lineage ... 24 Appendix D (informative) Table of Test Record for Test Cycle of 8 Operating Conditions ... 25 Appendix E (informative) Table of Test Record for Test Cycle of 6 Operating Conditions ... 28 Appendix F (informative) Table of Test Record for Test Cycle of 5 Operating Conditions ... 30 Appendix G (informative) Table of Test Record for Test Cycle of 4 Variable- speed Operating Conditions ... 32 Appendix H (informative) Table of Test Record for Test Cycle of 4 Constant- speed Operating Conditions ... 34 Limits and Measurement Methods for Non-road Diesel Engine Specific Fuel Consumption1 ScopeThis Standard specifies the limits and measurement methods for non-road diesel engine weighted specific fuel consumption. This Standard is applicable to non-road diesel engines whose rated power is not greater than 560 kW (hereinafter referred to as diesel engines); the used fuel is light diesel oil, excluding marine diesel engines that use heavy oil.2 Normative ReferencesThe following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB 20891-2014 Limits and Measurement Methods for Exhaust Pollutants from Diesel Engines of Non-road Mobile Machinery (China III, IV) GB/T 21404-2008 Internal Combustion Engine - Determination and Method for the Measurement of Engine Power - General Requirements3 Terms and DefinitionsWhat is defined in GB/T 21404 and GB 20891, and the following terms and definitions are applicable to this document. 3.1 Non-road Diesel Engine Non-road diesel engine refers to diesel engine for land use (except for road vehicles and three-wheeled vehicles), marine, agricultural and forestry tractors, agricultural machinery, construction machinery, generator sets and water pump sets, etc. 3.2 Weighted Specific Fuel Consumption Weighted specific fuel consumption refers to the ratio of the cumulative sum of the measured hourly fuel consumption of each operating condition respectively multiplied by its corresponding weighting coefficient to the cumulative sum of the power of each operating condition respectively multiplied by its corresponding weighting coefficient value 42,700 kJ/kg, expressed in [g(kwh)]; gewf---specific fuel consumption obtained during the measurement, expressed in [g(kwh)]; Huf---the low calorific value of fuel used in the measurement, expressed in (kJ/kg); Hub---reference low calorific value of fuel, namely, 42,700 kJ/kg.6 Diesel Engine Lineage and Source EngineThe definition of diesel engine lineage and source engine is shown in 3.8 and 3.9 of GB 20891-2014. The determination of parameters of diesel engine lineage and source engine selection are respectively shown in Chapter 8 and Chapter 9 of GB 20891-2014.7 Limits of Weighted Specific Fuel ConsumptionIn accordance with the rated power, the limits of weighted specific fuel consumption of diesel engine are divided into 10 gears. The manufacturer may choose to limit the diesel engine lineage to one power gear and verify the weighted specific fuel consumption of the power gear of diesel engine lineage. In the same lineage, it is allowed to select a representative model as the source engine for measurement and assessment. The limits of non-road diesel engine weighted specific fuel consumption are shown in Table 1. The limits of air-cooled diesel engine and condensing diesel engine are allowed to increase by 4%. Before the measurement of the specific fuel consumption, the diesel engine is allowed to run-in in accordance with the manufacturer’s regulations. All limits are the limits under the standard reference conditions specified in Chapter 5 of GB/T 21404-2008. During the measurement of non-road diesel engine rated power (total power), the equipment and auxiliary devices that shall be installed shall comply with the stipulations of Appendix A. 8.1.5 In accordance with the purpose of diesel engine, determine the applicable test cycle. In addition, in accordance with the rated power, rated speed, maximum torque and the speed of the diesel engine, determine the power, torque and speed of each operating condition in the corresponding test cycle. 8.1.6 After the operating condition of each test cycle reaches the steady state specified by the manufacturer, measure the power / torque, speed, specific fuel consumption per hour and intake air temperature at least twice. In addition, take the average value as the measured value of the operating condition; the torque does not exceed ±2% of the maximum torque at the test speed; the speed does not exceed 1% or ± 10 r/min; the difference between the two measured values of specific fuel consumption per hour does not exceed 2%. 8.1.7 The fuel used for the test is consistent with the fuel used for the four-stage emission measurement specified in the currently valid GB 20891-2014. If it is another designation (calorific value) of diesel, in accordance with Formula (2), convert the weighted specific fuel consumption. The engine oil used for the test is the engine oil specified by the diesel engine manufacturer and is indicated in the test report. 8.1.8 During the test, the temperature of the cooling medium and engine oil shall comply with the stipulations of 6.3.4.10 and 6.3.4.12 in GB/T 21404-2008. 8.1.9 When the laboratory air intake system is used, the air intake resistance under the calibrated operating condition shall be within 110% of the upper limit specified by the manufacturer. When the laboratory exhaust system is used, the difference between the back pressure under the calibrated operating condition and the upper limit specified by the manufacturer shall not exceed 1 kPa. 8.1.10 During the test, the fuel temperature shall comply with the stipulations of B.2.7 in GB 20891-2014. The fuel temperature at the inlet of the fuel injection pump shall be 306 K ~ 316 K (33 °C ~ 43 °C), or, comply with the manufacturer’s stipulations. 8.1.11 Adopt the mass method to measure the specific fuel consumption. When using a manual instrument for measurement, the duration of measurement shall be not less than 60 s; when using an automatic instrument for measurement, the duration of measurement shall be not less than 30 s. 8.2 Test Cycle Used for Measurement of Weighted Specific Fuel Consumption 8.2.1 In accordance with the purpose of diesel engine, it is divided into 5 test cycles, which are respectively shown in Table 2 ~ Table 6. 8.2.2 The land diesel engine used for variable speed shall be measured in accordance with Table 2. The measurement results shall be recorded in Appendix D.Appendix B(Normative) A Description of Characteristics of Diesel Engine Lineage Source Engine B.1 A Description of Diesel Engine B.1.1 Manufacturer: ___________________ B.1.2 Manufacturer’s engine No.: ___________________ B.1.3 Purpose: ___________________ B.1.4 Cycle: four-stroke / two-stroke1 B.1.5 Number of cylinders and arrangement: ___________________ B.1.6 Cylinder diameter: ___________________ mm B.1.7 Distance of travel: ___________________ mm B.1.8 Sequence of ignition: ___________________ B.1.9 Displacement: ___________________ cm3 B.1.10 Volume compression ratio2: ___________________ B.1.11 Combustion chamber and piston top diagram: ___________________ B.1.12 Minimum cross-sectional area of air intake and exhaust ports: _____________ B.1.13 Description of combustion system: ___________________ B.1.14 Idling speed: ___________________ r/min B.1.15 Rated speed: ___________________ r/min B.1.16 Rated power: ___________________ kW B.1.17 Maximum torque: ___________________ Nm B.1.18 Maximum torque speed: ___________________ r/min 1 Cross out the one that does not apply. 2 Indicate the tolerances.Appendix D(Informative) Table of Test Record for Test Cycle of 8 Operating Conditions When testing and measuring the weighted specific fuel consumption of non-road diesel engine under 8 operating conditions, use Table D.1 for recording. Table D.1 -- Table of Test Record of Weighted Specific Fuel Consumption of Non-road Diesel Engine (for 8 operating conditions) Diesel Engine Manufacturer: Dynamo- meter Model: Atmospheric Conditions Pressure: Fuel Designation Participant Model: No.: Dry Temperature: Engine Oil Designation No.: Power Formula: P = Relative Humidity: Location of Test Purpose: Atmospheric Factor: fa= Record: Applicable Test Cycle: Proofreading: Intermediate Speed (r/min): Test Item Operating Condition Speed Dynamo- meter Reading Power Torque Amount of Fuel Consumption Specific Fuel Consumption Air Intake Air Exhaust Engine Oil Cooling Water Temperature Actual Measure Actual Measure Oil Mass Oil Consumption Time Hourly Fuel Consumption Actual Measure Dry Temperature Temperature Pressure Temperature In Out r/min N kW Nm g s g/h g/(kWh) °C °C kPa °C °C °C Rated 1 Rated 100% Speed/ Rated Power Torque Ttq Speed Ttq Average Value 2 75% Ttq Average Value 3 50% Ttq Average Value 4 10% Ttq Average Value Inter- mediate/ Maxi- mum Torque Tmtq Inter- mediate Speed 100% Tmtq Average Value 6 75% Tmtq Average Value 7 50% Tmtq Average Value 8 Idling Speed 0 Average Value Calculation Result of Weighted Specific Fuel Consumption gew =Appendix E(Informative) Table of Test Record for Test Cycle of 6 Operating Conditions When testing and measuring the weighted specific fuel consumption of non-road diesel engine under 6 operating conditions, use Table E.1 for recording. Table E.1 -- Table of Test Record of Weighted Specific Fuel Consumption of Non-road Diesel Engine (for 6 operating conditions) Diesel Engine Manufacturer: Dynamo- meter Model: Atmospheric Conditions Pressure: Fuel Designation Participant Model: No.: Dry Temperature: Engine Oil Designation No.: Power Formula: P = Relative Humidity: Location of Test Purpose: Atmospheric Factor: fa= Record: Applicable Test Cycle: Proofreading: Test Item Operating Condition Speed Dynamo- meter Reading Power Torque Amount of Fuel Consumption Specific Fuel Consumption Air Intake Air Exhaust Engine Oil Cooling Water Temperature Actual Measure Actual Measure Oil Mass Oil Consumption Time Hourly Fuel Consumption Actual Measure Dry Temperature Temperature Pressure Temperature In Out r/min N kW Nm g s g/h g/(kWh) °C °C kPa °C °C °C Rated 1 Rated 100%Appendix G(Informative) Table of Test Record for Test Cycle of 4 Variable-speed Operating Conditions When testing and measuring the weighted specific fuel consumption of non-road diesel engine under 4 variable-speed operating conditions, use Table G.1 for recording. Table G.1 -- Table of Test Record of Weighted Specific Fuel Consumption of Non-road Diesel Engine (for 4 variable-speed operating conditions) Diesel Engine Manufacturer: Dynamo- meter Model: Atmospheric Conditions Pressure: Fuel Designation Participant Model: No.: Dry Temperature: Engine Oil Designation No.: Power Formula: P = Relative Humidity: Location of Test Purpose: Atmospheric Factor: fa= Record: Applicable Test Cycle: Proofreading: Intermediate Speed (r/min): Test Item Operating Condition Rated Speed (r/min) Dynamo- meter Reading Power / Rated Power (kW) Torque Amount of Fuel Consumption Specific Fuel Consumption Air Intake Air Exhaust Engine Oil Cooling Water Temperature Oil Mass Oil Consumption Time Hourly Fuel Consumption Actual Measure Dry Temperature Temperature Pressure Temperature In Out % N % Nm g s g/h g/(kWh) °C °C kPa °C °C °C ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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