1 Scope
This standard specifies the durability requirements and test procedures for emission control systems for heavy-duty vehicles.
This standard is applicable to the durability assessment of emission control systems for the type approval and production conformity inspection of category M2, M3, N2 and N3 motor vehicles fitted with exhaust after-treatment devices and at a design speed of more than 25 km/h, as well as category M1 motor vehicles with a total mass greater than 3,500 kg.
When the type approval and the production conformity inspection are carried out on motor vehicles fitted with exhaust after-treatment devices in accordance with GB 14762-2002, Phase II of GB 17691-2001 or Phase III of GB 17691-2005, they shall meet the durability requirements of emission control systems stipulated in this standard.
This standard may be executed for the exhaust after-treatment device, which uses a variety of independent techniques to carry out the type approval.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Fuel for Use in Test
5 Durability Requirements and Test
6 Expansion Relating to the Durability of the Pollution Control Device
7 Application for a Durability Test
8 Implementation of the Standard
Appendix A (Normative) Durability Test Procedures of Emission Control Systems for Heavy-Duty Vehicles
Appendix AA (Normative) Durability Test Cycle
1 Scope
This standard specifies the durability requirements and test procedures for emission control systems for heavy-duty vehicles.
This standard is applicable to the durability assessment of emission control systems for the type approval and production conformity inspection of category M2, M3, N2 and N3 motor vehicles fitted with exhaust after-treatment devices and at a design speed of more than 25 km/h, as well as category M1 motor vehicles with a total mass greater than 3,500 kg.
When the type approval and the production conformity inspection are carried out on motor vehicles fitted with exhaust after-treatment devices in accordance with GB 14762-2002, Phase II of GB 17691-2001 or Phase III of GB 17691-2005, they shall meet the durability requirements of emission control systems stipulated in this standard.
This standard may be executed for the exhaust after-treatment device, which uses a variety of independent techniques to carry out the type approval.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies
Contents of GB 20890-2007
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Fuel for Use in Test
5 Durability Requirements and Test
6 Expansion Relating to the Durability of the Pollution Control Device
7 Application for a Durability Test
8 Implementation of the Standard
Appendix A (Normative) Durability Test Procedures of Emission Control Systems for Heavy-Duty Vehicles
Appendix AA (Normative) Durability Test Cycle
