GB 18176-2002 Emission limits and measurement methods for exhaust pollutants from light motorcycles (operating condition method)

GB 18176-2002 Emission limits and measurement methods for exhaust pollutants from light motorcycles (operating condition method) GB18176-2002 standard download decompression password: www.bzxz.net

ICS13.040.50
National Standard of the People's Republic of China
GB18176-—2002
Replaces GB18176.·-2000
Exhaust Pollutants from Mopeds
Emission Limits and Measurement Methods
(Working Condition Method)
Limits and measurement methods for exhaust emissionsfrom mopeds under running modePromulgated on November 18, 2002
State Environmental Protection Administration
General Administration of Quality Supervision, Inspection and Quarantine
Implementation on January 1, 2003
GB18176-—2002bZxz.net
This standard is formulated to implement the Environmental Protection Law of the People's Republic of China and the Law of the People's Republic of China on the Prevention and Control of Air Pollution, control the pollution caused by exhaust pollutants from mopeds and improve the quality of ambient air. The test methods and limits of this standard are equivalent to the part of the working conditions of mopeds in Appendix 1 of Chapter 5 of 97/24/EC issued by the European Union (EU) in 1997, which is applicable to mopeds. The control strength has reached the level of Europe in the late 1990s.
This standard specifies the emission limits and measurement methods of exhaust pollutants from mopeds, and puts forward durability requirements for pollution control devices emitted by mopeds.
From the date of implementation of this standard, GB18176---2000 "Limits and Test Methods for Exhaust Pollutants from Mopeds" will be abolished. Appendix A, Appendix B and Appendix C of this standard are all appendices to the standard. This standard was proposed by the Science and Technology Standards Department of the State Environmental Protection Administration. The main drafting units of this standard are: Tianjin Motorcycle Technology Center and National Motorcycle Quality Supervision and Inspection Center. This standard was approved by the State Environmental Protection Administration on June 14, 2002. This standard is interpreted by the State Environmental Protection Administration. 556
1 Scope
Exhaust pollutants from light motorcycles
Emission limits and measurement methods
(Working conditions method)
GB 18176—2002
This standard specifies the emission limits and measurement methods for carbon dioxide (CO), hydrocarbons (HC) and nitrogen oxides (NO) in the exhaust pollutants emitted by light motorcycles.
This standard applies to two-wheeled or three-wheeled light motorcycles equipped with spark ignition engines with a curb weight of less than 400kg, an engine displacement of no more than 50mL, and a maximum design speed of no more than 50km/h. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB17930--1999 Unleaded gasoline for vehicles
GB/T5359.5-1996 Terminology of motorcycles and mopeds Two-wheeled vehicle mass GB/T5359.6--1996 Terminology of motorcycles and mopeds Three-wheeled vehicle mass GB/T4570-1995 Durability test method for motorcycles and mopeds GB/T5374-1995 Reliability test method for motorcycles and mopeds 3 Definitions
This standard adopts the following definitions:
3.1 Reference mass
Refers to the curb weight of a moped (according to GB/T5359.5 and GB/T5359.6) plus the mass of the driver of 75kg. 3.2 Exhaust pollutants
Refers to carbon dioxide (CO), hydrocarbons (HC) and nitrogen oxides (NO) expressed as nitrogen dioxide equivalent emitted from the exhaust pipe of a moped.
3.3 Diluted exhaust
refers to the homogeneous mixture of the exhaust of a moped diluted with ambient air. 3.4 Pollution control device
refers to the device on a moped that controls or limits exhaust emissions. 3.5 Engine crankcase
refers to the internal or external space of the engine, which is connected to the oil pan through an internal or external passage, through which gas or steam can escape.
4 Test classification
According to the nature of the test, it is divided into type approval test and production consistency inspection test. 4.1 During the type approval test, the manufacturer shall submit a representative vehicle of the model for the test specified in Article 5. 557
GB18176—-2002
4.2 During the production consistency inspection test, one vehicle is randomly selected from the mass-produced vehicles that have passed the type approval test of this standard and is subjected to the test specified in Article 6.
5 Type Approval Test
5.1 Overview
The design, manufacture and assembly of components that affect the emission of exhaust pollutants shall ensure that the light motorcycle meets the requirements of this standard under normal use conditions even if it is subject to vibration. 5.2 Test Description
5.2.1 The light motorcycle shall be subjected to the following test 5.2.1.1 This method is used to verify the emission of exhaust pollutants of light motorcycles under working conditions. 5.2.1.1.1 The light motorcycle shall be placed on a dynamometer equipped with a power absorption device and an inertia simulation device. One test lasts 448s and consists of four consecutive running cycles. Each cycle consists of seven stages (rapid, acceleration, constant speed and deceleration, etc.). During the test, the exhaust gas shall be diluted with air and the volume flow of the mixed gas shall be kept constant. During the test, a continuous mixed gas sampling flow is sent to the sampling bag to determine the concentration of carbon monoxide (CO), unburned hydrocarbons (HC) and nitrogen oxides (NO.) in turn (taking the test average value), and determine their total volume. At the end of the test, the accumulated number of revolutions of the tachometer on the drum shall be used to determine the actual distance traveled by the moped. 5.2.1.1.2 The test shall be carried out in accordance with the method specified in Appendix C of this standard, and various gases shall be collected and analyzed using the specified method. 5.2.1.1.3 Except as provided in 5.2.1.1.4 below, the test shall be carried out three times. The measured values ​​of carbon monoxide, hydrocarbons and nitrogen oxides obtained in each test shall be lower than the limit values ​​in Table 1. Table 1 Emission limits of exhaust pollutants of mopeds and their implementation date limit value/(g/km)
Exhaust pollutants
Phase I
Two-wheeled mopeds
Three-wheeled mopeds
Phase II
Two-wheeled mopeds
Three-wheeled mopeds
Note 1: The first phase type approval test shall be implemented from January 1, 2003, and the production consistency inspection test shall be implemented from January 1, 2004. Note 2: The second phase type approval test shall be implemented from January 1, 2005, and the production consistency inspection test shall be implemented from January 1, 2006. For each of the above pollutants, when the arithmetic mean of the three measurement results is lower than the prescribed limit, one of the three measurement results is allowed to exceed the corresponding prescribed limit, but shall not exceed 110% of the limit. For more than one pollutant exceeding the prescribed limit, it is allowed whether it occurs in the same test or in different tests. 5.2.1.1.4 Under the following specific conditions, the number of tests specified in 5.2.1.1.3 may be reduced. For each pollutant mentioned in 5.2.1.1.3, V, is the result of the first measurement, V2 is the result of the second measurement, and L is the limit value of each pollutant specified in Table 1. 5.2.1.1.4.1 If each pollutant satisfies V,≤0.70L, only one test is required. 5.2.1.1.4.2 If one or more pollutants have V,>0.70L, and each pollutant satisfies V,≤0.85L, a second test is required. If V,≤0.85L,
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