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GB 19756-2005 English PDF (GB19756-2005)

GB 19756-2005 English PDF (GB19756-2005)

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GB 19756-2005: Limits and measurement methods for exhaust pollutants from diesel engines of tri-wheel and low-speed goods vehicles

This standard specifies the emission limits and measurement methods of exhaust pollutants from diesel engines of tri-wheel & low-speed goods vehicles. This standard is applicable to diesel engines which are installed in tri-wheel & low-speed goods vehicles, as well as their vehicles. If the diesel engines, which are installed in tri-wheel & low-speed goods vehicles, have passed the type approval, according to GB 17691-2001 "Limits and measurement methods for exhaust pollutants from compression ignition (C.I.) engines of vehicles", THEN, the diesel engines installed in these vehicles do not need to be type approved in accordance with this standard.
GB 19756-2005
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 13.040.50
Z 64
Limits and measurement methods for exhaust pollutants
from diesel engines of tri-wheel & low-speed goods vehicles
ISSUED ON: MAY 30, 2005
IMPLEMENTED ON: JANUARY 01, 2006
Issued by: State Environmental Protection Administration;
General Administration of Quality Supervision, Inspection and
Quarantine of PRC.
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Application and approval of type approval ... 9
5 Test classification and test method ... 11
6 Exhaust pollutant emission limits ... 11
7 Additional requirements for tri-wheel & low-speed goods vehicles ... 13 8 Diesel engine family and source engine ... 14
9 Implementation of standards ... 15
Appendix A (Normative) Materials for type approval application ... 16
Appendix B (Normative) Test procedure ... 28
Appendix C (Normative) Type approval certificate ... 72
Limits and measurement methods for exhaust pollutants
from diesel engines of tri-wheel & low-speed goods vehicles
1 Scope
This standard specifies the emission limits and measurement methods of exhaust pollutants from diesel engines of tri-wheel & low-speed goods vehicles. This standard is applicable to diesel engines which are installed in tri-wheel & low- speed goods vehicles, as well as their vehicles.
If the diesel engines, which are installed in tri-wheel & low-speed goods vehicles, have passed the type approval, according to GB 17691-2001 "Limits and measurement methods for exhaust pollutants from compression ignition (C.I.) engines of vehicles", THEN, the diesel engines installed in these vehicles do not need to be type approved in accordance with this standard.
2 Normative references
The provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard; however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.
GB 252-2000 Light diesel fuels
GB 7258 Safety specifications for power-driven vehicles operating on roads GB 17691-2001 Limits and measurement methods for exhaust pollutants from compression ignition (C.I.) engines of vehicles
GB/T 17692-1999 Measurement methods of net power for automotive engines GB/T 19147-2003 Automobile diesel fuels
GB 18322 Limits and measurement methods for smoke at free acceleration from agricultural vehicles
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1 Tri-wheel & low-speed goods vehicles
According to the provisions of GB 7258-2004:
Tri-wheel vehicles refer to freight vehicles, which have three wheels whose maximum design speed is less than or equal to 50 km/h.
Low-speed goods vehicles refer to freight vehicles, which have four wheels whose maximum design speed is less than 70 km/h.
3.2 Type approval of vehicle
It refers to the approval of a vehicle type for the emission level of exhaust pollutants. 3.3 Type approval of diesel engine
It refers to the approval of a diesel engine model for the emission level of diesel engine's exhaust pollutants.
3.4 Diesel engine models
It refers to the same type of diesel engines, which have no difference in the basic characteristic parameters of the diesel engine, as listed in Annex AA.
3.5 Diesel engine family
Refers to a group of diesel engines, which are designed by the manufacturer in accordance with the provisions of Annex AB. These diesel engines have similar exhaust emission characteristics; all diesel engines in the same family must meet the corresponding emission limits.
3.6 Source engine
It refers to a diesel engine, which is selected from a diesel engine family, that can represent the emission characteristics of the diesel engine family.
3.7 Exhaust pollutants
It refers to the gaseous pollutants and particulate matter, which is discharged from the exhaust pipe of a diesel engine.
3.8 Gaseous pollutants
It refers to carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx) in 4 Application and approval of type approval
4.1 Application for type approval
Manufacturers of tri-wheel & low-speed goods vehicles OR diesel engines for tri-wheel & low-speed goods vehicles shall make application for the type approval, from the emission type approval department, which is responsible for the emission of vehicle, (hereinafter referred to as the "type approval authority"), on the exhaust pollutant emission levels of the tri-wheel & low-speed goods vehicles and the diesel engines, that meet the applicable scope of this standard.
4.1.1 Application for type approval of diesel engines for tri-wheel & low-speed goods vehicles
4.1.1.1 Manufacturers of diesel engines for tri-wheel & low-speed goods vehicles shall apply for type approval of the exhaust pollutant emission levels of diesel engines for tri-wheel & low-speed goods vehicles.
4.1.1.2 Relevant technical materials for type approval shall be submitted, in accordance with the requirements of Appendix A of this standard, including the description of the diesel engine type or diesel engine family, that needs type approval (see Annex AA and Annex AB for details).
4.1.1.3 It shall submit a diesel engine, that meets the characteristics of the "diesel engine type" or "source engine", as described in Appendix A, to the inspection authority, which is responsible for the type approval test; complete the test content specified in Article 5.2 of this standard.
4.1.2 Application for type approval of tri-wheel & low-speed goods vehicles 4.1.2.1 Application for type approval of models equipped with non-type approved diesel engines
4.1.2.1.1 Manufacturers of tri-wheel & low-speed goods vehicles shall apply for type approval, for the emission levels of exhaust pollutants, for the models which are equipped with diesel engines or diesel engine families that have not been type-approved. 4.1.2.1.2 The relevant technical data for type approval shall be submitted, in accordance with the requirements of Appendix A of this standard, including the type approval vehicle type, its vehicle parts related to the diesel engine, the description of the diesel engine model or diesel engine family (if applicable) ( See Annex AA, Annex AB, Annex AC for details).
4.1.2.1.3 A diesel engine conforming to the characteristics of the "diesel engine type" and "source engine", which is described in Appendix A, shall be submitted to the inspection authority, which is responsible for the type approval test, to complete the test content specified in Article 5.2 of this standard.
4.1.2.1.4 At the same time, the relevant materials of the test, in accordance with the requirements of GB 18322, shall be submitted for the vehicle type approval. 4.1.2.2 Application for type approval for models equipped with type approved diesel engines
4.1.2.2.1 Manufacturers of tri-wheel & low-speed goods vehicles shall apply for type approval of the tri-wheel & low-speed goods vehicles, which are equipped with diesel engines, that have been type-approved in terms of their exhaust pollutant emission levels.
4.1.2.2.2 The relevant technical data for type approval shall be submitted, according to the requirements of Appendix A of this standard, including the description of the type approval vehicle type and the vehicle parts related to the diesel engine (see Appendix AC for details).
4.1.2.2.3 A copy of the type approval certificate of the diesel engine type (or diesel engine family) shall be submitted, at the same time.
4.1.2.2.4 At the same time, the relevant materials of the test, in accordance with the requirements of GB 18322, shall be submitted for the vehicle type approval. 4.2 Approval of type approval
Diesel engines, that meet the requirements of Article 4.2.1 and Article 4.2.2 of this standard, OR tri-wheel & low-speed goods vehicles, that meet Article 4.2.3 and Article 4.2.4 of this standard, shall be granted type approval and issued with the type approval certificate, in accordance with Appendix C.
4.2.1 The diesel engine (source engine) shall be tested according to the provisions of Appendix B of this standard. The exhaust pollutant emission shall meet the requirements in Table 1 of Article 6.1 of this standard.
4.2.2 Discharge approval for family members
4.2.2.1 Except for the cases mentioned in Article 4.2.2.2, the type approval of the source engine can be extended to all members of the family, without further testing. 4.2.2.2 Diesel engines for secondary inspection. For a type approval application for a certain diesel engine, OR a diesel engine belonging to a certain diesel engine family installed in a vehicle, if the competent authority for type approval considers that the source engine selected for the application cannot fully represent the diesel engine family, which is defined in Annex AB, the competent authority for type approval shall select another diesel engine. If necessary, it may select an additional representative diesel engine for testing.
Appendix A
(Normative)
Materials for type approval application
When applying for type approval of a new model (or diesel model), the following materials, including the content table of contents, shall be provided in electronic documents.
Schematic diagrams, if any, shall be of adequate detail and to a suitable scale. They shall be A4 in format, OR folded to that size. Photographs, if available, shall show their details. If the system, component or independent technical assembly is controlled by microprocessor, its performance data shall be provided.
Model/source engine/diesel model 2):
A.1 Overview
A.1.1 Brand (commercial name of the manufacturer): _____________________ A.1.2 Model and commercial general description: _____________________
A.1.3 Model (or model) identification: _____________________
A.1.4 Vehicle category (if applicable): _____________________
A.1.5 Diesel engine category: _____________________
A.1.6 Name and address of the manufacturer: _____________________
A.1.7 Position and fixing method of identification plate and nameplate: ___________ A.1.8 Address of final assembly plant: _____________________
A.2 Accompanying documents
A.2.1 The basic characteristics of the diesel engine (Original engine) and relevant test data.
A.2.2 Basic characteristics of diesel engine family.
A.2.3 Basic characteristics of each diesel model within the family.
A.2.4 Characteristics of vehicle components related to diesel engines (if any) 2) Cross out those that do not apply. [Translator?€?s note: Footnote numbering is incremented as per MS-Word?€?s formatting]
B.2.1.2 Test validity
The test is considered valid, when the parameter F meets the following conditions: B.2.2 Diesel engine intake system
A diesel engine intake system shall be adopted, which can control the intake vacuum degree, when the engine is running at the maximum rated power and full load speed, so that it is within the range of ??100 Pa of the specified upper limit.
B.2.3 Diesel engine exhaust system
A set of exhaust system shall be used, which can control the exhaust back pressure of the diesel engine, when it is running at the maximum rated power and full load speed, so that it is within the range of ??1000 Pa of the specified upper limit. The volume of the system is within the range of ??40% of the volume, which is specified by the manufacturer. If the exhaust system of the test room can represent the actual operating conditions of the diesel engine, the exhaust system of the test room may be used. The exhaust system shall meet the requirements for exhaust sampling. Such as Article BA.3.4, as well as the description of "exhaust pipe" in Articles BD.2.1.1 and BD.2.2.2. B.2.4 Cooling system
The diesel engine's cooling system used shall have sufficient capacity, to maintain the diesel engine at the normal operating temperature, which is specified by the manufacturer.
B.2.5 Lubricating oil
According to the provisions of Article AA.6.1, record the specifications, etc. of the lubricating oil, which is used during the test
B.2.6 Fuels
The type approval test shall use diesel oil, which complies with the provisions of GB/T 19147-2003. The production consistency inspection test shall use the diesel oil, which complies with the provisions of GB 252-2000.
The fuel temperature and measuring point shall be specified by the manufacturer; it shall be within the limits given in Article AA.1.15.5; the fuel temperature shall not be lower than 306 K (33 ??C). If not specified, the temperature at the inlet of the fuel pump shall be 311 K ?? 5 K (38 ??C ?? 5 ??C).
B.2.7 Determining the setting value of dynamometer
The full-load torque curve must be measured, through the test, so as to calculate the shall then be stored in a closed but not airtight petri dish OR in a sealed filter paper holder, until required for testing. If the filter paper (pair) is not used, within 1 h after it is taken out of the weighing chamber, it must be re-pretreated and weighed before use. B.3.2 Installation of measuring equipment
Install instruments and sampling probes as required. When the exhaust gas is diluted by a full-flow dilution system, the exhaust tailpipe of the diesel engine shall be connected to the system.
B.3.3 Start dilution system and diesel engine
The dilution system and diesel engine shall be started and preheated, until all temperatures and pressures have stabilized at maximum power, as recommended by the manufacturer and proven engineering experience.
B.3.4 Start the particulate sampling system
The particulate sampling system shall be started and run in bypass.
B.3.5 Adjust the dilution ratio
The setting of the dilution air shall ensure that, under any working conditions, the temperature of the diluted exhaust air immediately before the primary filter paper of particulate matter is not higher than 325 K (52 ??C), meanwhile the dilution ratio (q) is not less than 4.
For systems that control the dilution ratio, by measuring the CO2 or NOx concentration, the CO2 or NOx content of the dilution air shall be measured, at the beginning and end of each test. The background values of CO2 or NOx in the diluted air, which is measured before and after the test, shall be within 100 pm or 5 ppm, respectively. B.3.6 Check analyzer
The zero and span points of the exhaust gas analyzer shall be calibrated. B.3.7 Test cycle
B.3.7.1 The operation of the test diesel engine on the dynamometer shall follow the cycle of 13 working conditions, which are listed in Table B.1.
B.3.7.2 Test sequence
Run the test program. The test shall be carried out in the sequence of working condition numbers listed in Article B.3.7.1. The diesel engine runs for 6 minutes, in each working condition; the working condition conversion of the diesel engine's speed and load is completed within 1 minute. The speed specified in each working condition shall be kept within ??50 r/min; the specified torque shall be kept within ??2% of the maximum torque, Annex BA
(Normative)
Measurement and sampling procedures
BA.1 Overview
Exhaust pollutants from diesel engines, which are submitted for testing, shall be measured, using a system of the principle described in Annex BD. Annex BD respectively describes the recommended gaseous pollutant analysis system (see Article BD.1) and the recommended particle dilution and sampling system (see Article BD.2). Gaseous pollutants shall be measured in the raw exhaust. If a full-flow dilution system is used to measure particulate matter, gaseous pollutants can also be measured in the diluted exhaust. Particulate matter can be measured by both full-flow and partial-flow dilution systems.
BA.2 Dynamometer and test equipment
The diesel engine emission test, which is carried out on the engine dynamometer, shall use the following equipment.
BA.2.1 Engine dynamometer
The test cycle, which is described in Annex B3.7, shall be carried out using an engine dynamometer, which has appropriate characteristics. The accuracy of the speed measuring system shall be ??2% of reading. The accuracy of the torque measuring system shall be ??3% of reading, in the range greater than 20% of full range; it shall be ??0.6% of full range, in the range of less than or equal to 20% of full range. BA.2.2 Other instruments
Measuring instruments for fuel consumption, air consumption, coolant and oil temperature, exhaust pressure, air intake manifold vacuum, exhaust temperature, intake air temperature, atmospheric pressure, humidity, fuel temperature shall be used, if necessary. These instruments shall meet the requirements given in Table BA.1: In order to calculate the emissions in the diluted exhaust, using a full-flow dilution system, it is necessary to know the flow rate of the diluted exhaust (see Article BC.1.1.4). The total mass flow rate (GTOT) of the diluted exhaust gas shall be measured by PDP or CFV (Article BD.2.1.1). The accuracy of the measuring equipment shall be ??2% of reading or better, which shall be determined in accordance with Article BD.2.1. BA.3 Measurement of gaseous components
BA.3.1 General technical specifications of analyzers
The analyzer shall have a suitable range, which can meet the accuracy, which is required for measuring the concentration of gaseous pollutants (see Article BA.3.1.1). It is recommended that the analyzer work according to the principle that ?€?the concentration of the measured gas pollutants shall be 15% ~ 100% of its full range?€?.
Measurements may also be made, if the readout system (computer, data logger) can provide sufficient accuracy and resolution below 15% of full range. At this time, it is necessary to add at least 4 equally spaced points for calibration (except the zero point) to ensure the accuracy of the calibration curve, which is obtained in accordance with Article BB.1.5.5.2.
The electromagnetic compatibility (EMC) of the equipment shall be such that additional errors are minimized.
BA.3.1.1 Measurement error
The total measurement error, including cross effects on other gases (see Article BB.1.9), shall not exceed ??5% of reading or ??3.5% of full range (whichever is smaller). For concentrations lower than 100 ppm, the measurement error shall not exceed ??4 ppm. BA.3.1.2 Repeatability
Definition of repeatability: 2.5 times the standard deviation of the 10 repeated response values for a given calibration gas or span gas. For calibration gas or span gas, which is greater than 155 ppm (or ppm C), its repeatability shall not exceed ??1% of the full-scale concentration of the range; for calibration gas or span gas, which is below 155 ppm (ppm C), the repeatability shall not exceed ??2% of the full-scale concentration of the span concentration.
BA.3.1.3 Noise
Or for all ranges used, the peak-to-peak response value of the analyzer, for any 10 s period of zero gas, calibration gas or span gas, shall not exceed ??2% of full range. BA.3.1.4 Zero drift
For the lowest range used, the zero drift during 1 h shall be less than ?? 2% of full range. The sampling probe must be installed upstream from the outlet of the exhaust system, at least 0.5 m or three times the diameter of the exhaust pipe (whichever is greater), a...

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