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GB/T 18881-2009 (GBT 18881-2009)

GB/T 18881-2009_English: PDF (GBT18881-2009)
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GB/T 18881-2009English269 Add to Cart 3 days Catalyst for light-duty petrol vehicle exhaust purification GB/T 18881-2009 Obsolete GB/T 18881-2009

BASIC DATA
Standard ID GB/T 18881-2009 (GB/T18881-2009)
Description (Translated English) Catalyst for light-duty petrol vehicle exhaust purification
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G75
Classification of International Standard 71.100.40
Word Count Estimation 7,786
Date of Issue 2009-04-23
Date of Implementation 2010-02-01
Older Standard (superseded by this standard) GB/T 18881-2002
Drafting Organization Kunming Institute Catalysts LLC
Administrative Organization Rare National Standardization Technical Committee
Proposing organization National Standardization Technical Committee of Rare Earth
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the light-duty gasoline vehicle exhaust purification catalyst requirements, test methods, inspection rules and signs, packaging, transport and storage. This standard applies to cordierite honeycomb ceramic materials as a matrix and a load of rare earth, lightweight gasoline precious metals or other metals and other active ingredients vehicle exhaust purification catalyst.

GB/T 18881-2009
Catalyst for light-duty petrol vehicle exhaust purification
ICS 71.100.40
G75
National Standards of People's Republic of China
Replacing GB/T 18881-2002
Light gasoline vehicle exhaust gas purification catalyst
Posted 2009-04-23
2010-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 18881-2002 "gasoline vehicle exhaust gas purification catalyst."
This standard compared with GB/T 18881-2002, the main changes are as follows.
--- Standard name was changed to "light-duty gasoline vehicle exhaust purification catalyst";
--- Reference standard added "XB/T 505 gasoline vehicle exhaust gas purification catalyst carrier";
--- Deleted "JC/T 686 ceramic honeycomb" reference standard;
--- Deleted the definition of the oxidation catalyst, the requirements and test methods;
--- Increasing the catalyst of the same type of requirements;
--- Adjustment catalyst catalytic properties, physical properties requirements;
--- Adjust the vehicle catalytic catalyst performance and life requirements, test methods;
--- Remove Appendix A.
This standard by the National Standardization Technical Committee rare and centralized.
This standard by the Kunming Institute catalyst limited liability company, China Nonferrous Metals Industry Standards and Metrology Quality Research Institute, have your research Platinum Shares
Limited responsible for drafting.
The main drafters of this standard. Hexiao Kun, Yangdong Xia, namely Yongbo, Zhu Yuhua, Ko Lanta, Kang Jin-Wen, Wang Xianghong.
Light gasoline vehicle exhaust gas purification catalyst
1 Scope
This standard specifies the light gasoline vehicle exhaust gas purification catalyst requirements, test methods, inspection rules and signs, packaging, transportation and storage.
This standard applies to cordierite honeycomb ceramic material as the substrate and the active ingredient load of rare earth, precious metals or other light metals
Gasoline vehicle exhaust gas purification catalyst.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 2828.1 Sampling procedures for inspection - Part 1. by acceptance quality limit (AQL) retrieval batch inspection sampling plan
GB/T 5181 automobile emission terms and definitions
GB/T 8170 numerical rounding rules
GB 18352.3 light vehicle emission limits and measurement methods (China Ⅲ, Ⅳ stage)
Technical requirements GB/T 18377 conversion of petrol vehicles with catalytic converters and test methods
XB/T 505 gasoline vehicle exhaust gas purification catalyst carrier
3 Terms and Definitions
GB/T 5181 and established the following terms and definitions apply to this standard.
3.1
Means mounted in the exhaust system for gasoline vehicle catalytic converters to reduce emissions of the core, and its main role is catalytic oxidation
Reduction reaction to reduce emissions of petrol vehicles emit pollutants (carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NO x0)) of.
3.2
TWC
An oxidizing hydrocarbons and carbon monoxide while reducing nitrogen oxide catalyst. In order to obtain optimum conversion efficiency, engine
We must work in a very narrow range of air-fuel ratio (close to the stoichiometric state) inside.
3.3
It refers to a predetermined condition, the rate of change of the catalytic converter inlet and outlet concentrations of pollutants, according to equation (1).
Conversion efficiency (%) =
(1)
Where.
3.4
It means that the catalyst for catalytic conversion efficiency of a pollutant reaches 50% of the catalytic converter corresponding to the inlet gas temperature. Symbols