GB/T 40711.2-2021 PDF EnglishUS$260.00 · In stock · Download in 9 seconds
GB/T 40711.2-2021: Off-cycle technology/device energy saving effects evaluation methods for passenger cars - Part 2: Idle start-stop system Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 40711.2-2021: Off-cycle technology/device energy saving effects evaluation methods for passenger cars - Part 2: Idle start-stop system---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/GBT40711.2-2021 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.020 CCS T 40 Off-cycle technology/device energy saving effects evaluation methods for passenger cars - Part 2: Idle start-stop system ISSUED ON: OCTOBER 11, 2021 IMPLEMENTED ON: MAY 01, 2022 Issued by: State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword ... 3 Introduction ... 5 1 Scope ... 7 2 Normative references ... 7 3 Terms and definitions ... 7 4 General requirements ... 8 5 Test procedures ... 8 6 Test results ... 12 Appendix A (Normative) Idle start-stop system test report ... 14 References ... 19 Off-cycle technology/device energy saving effects evaluation methods for passenger cars - Part 2: Idle start-stop system1 ScopeThis document specifies the evaluation methods for the energy saving effects of the idle start-stop system for passenger cars. This document applies to M1 vehicles with an idle start-stop system, of which the maximum design gross mass does not exceed 3 500 kg. This document applies to vehicles capable of burning gasoline or diesel, not to externally rechargeable hybrid electric vehicles.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document. GB 18352.6-2016, Limits and measurement methods for emissions from light-duty vehicles (CHINA 6) GB/T 19233-2020, Measurement methods of fuel consumption for light-duty vehicles GB 19578, Fuel consumption limits for passenger cars GB/T 19753-2021, Test methods for energy consumption of light-duty hybrid electric vehicles GB 27999, Fuel consumption evaluation methods and targets for passenger cars3 Terms and definitionsTerms and definitions defined in GB 27999, and the following ones apply to this document. 3.1 Idle start-stop system A system that is capable of automatically turning off the engine when the vehicle is stopped or about to stop and the engine is at idle speed, and restarting it based on driver actions or vehicle demand.4 General requirements4.1 The idle start-stop system, during the on-period, shall not affect the safe operation of the vehicle. 4.2 The automobile manufacturer or its authorized agent shall submit a vehicle representing the tested model to the inspection agency, and provide the following relevant information: a) description of suppliers and models of key components of the idle start- stop system; b) description of the function and method of use of the idle start-stop system, including the conditions for turning off and restarting the engine; c) engine idle speed; d) list of energy-saving devices that can be manually switched on and off, including device name and function descriptions. 4.3 The tested vehicle shall comply with the requirements of fuel consumption limits specified in GB 19578 and requirements on pollutant emission in GB 18352.6-2016 (or other applicable versions). 4.4 The test conditions shall meet the requirements in Chapter 5 of GB/T 19233- 2020; for non-off-vehicle chargeable hybrid electric vehicles (NOVC-HEV), the test conditions shall meet the requirements in Chapter 4 of GB/T 19753-2021. 4.5 Test the idle start-stop system in accordance with the requirements of Chapter 5; record the test vehicle parameters and test data in accordance with the provisions of Appendix A. Calculate the energy saving effects according to the requirements of Chapter 6; express the calculation result in liters per 100 kilometers (L/100 km); round (round up) to two decimal places.5 Test procedures5.1 Determination of fuel consumption of the idle start-stop system tS,WLTC – the idling duration of the vehicle during the test of the idle start-stop system in on-state according to WLTC, in seconds (s); 1/3600 – the conversion factor of the unit from seconds (s) to hours (h); FCCLTC-P,OFF – the fuel consumption of the vehicle in accordance with CLTC-P during the test of the idle start-stop system in off-state, in liters per 100 kilometers (L/100 km); FCCLTC-P,ON – the fuel consumption of the vehicle during the test of the idle start- stop system in on-state according to CLTC-P, in liters per 100 kilometers (L/100 km); dCLTC-P – the mileage of the vehicle during the test of the idle start-stop system in on-state according to CLTC-P, in kilometers (km); BS,CLTC-P – the idling fuel consumption rate of the vehicle during the test of the idle start-stop system in off-state according to CLTC-P, in liters per hour (L/h); tS,CLTC-P – the idle duration of the vehicle during the test of the idle start-stop system in on-state according to CLTC-P, in seconds (s). 5.1.7 Perform repeatability inspection on the test results according to the requirements of 5.2. If it can pass the repeatability inspection, calculate the arithmetic mean of the results of the three tests as the final result of each test. If a certain test fails the repeatability test, for the fuel consumption test where the idle start-stop system is turned on, the arithmetic mean of the results of the two tests of higher fuel consumption shall be used as the final result; for the fuel consumption test where the idle start-stop system is turned off, the arithmetic mean of the results of the 2 tests of the lower fuel consumption shall be used as the final result; for the idling duration test where the idle start-stop system is turned on, the arithmetic mean of the results of the 2 tests of the lower idling duration shall be used as the final result; for the idling fuel consumption rate test, the arithmetic mean of the 2 test results of the lower idling fuel consumption rate shall be used as the final result. 5.2 Repeatability inspection Calculate the standard deviation σ of the 95th percentile distribution of the three test results of each test according to Formula (2); compare the difference between the maximum value and the minimum value (ΔFmax) in the three test results with the σ value: a) If ΔFmax is not greater than σ, it is regarded as passing the repeatability inspection; ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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