This standard specifies the limits and measurement methods for exhaust pollutants from diesel engines of urban vehicles (WHTC).
This standard is applicable to the type approval, production conformity inspection and in-service conformity inspection of urban vehicles with the total mass greater than 3,500 kg and their diesel engines.
2 Normative References
This standard makes reference to the following documents and the provisions in them, for undated references, the latest editions are applicable to this standard.
GB 17691-2005 Limits and Measurement Methods for Exhaust Pollutants from Compression Ignition and Gas Fuelled Positive Ignition Engines of Vehicles (III IV V)
HJ 437-2008 Technical Specification for On-board Diagnostic (OBD) System of Compression Ignition and Gas Fuelled Positive Ignition Engines of Vehicles
HJ 438-2008 Durability of Emission Control Systems of Compression Ignition and Gas Fuelled Positive Ignition Engines of Vehicles
HJ 439-2008 In-service Conformity of Compression Ignition and Gas Fuelled Positive Ignition Engines of Vehicles
The modification plan of [2008 No.24] Announcement of the Ministry of Environmental Protection "Limits and Measurement Methods for Exhaust Pollutants from Compression Ignition and Gas Fuelled Positive Ignition Engines of Vehicles (III IV V)" (GB 17691-2005), hereinafter referred to as "Modification Plan".
3 Terminologies and Definitions
For the purpose of this standard, the following terminologies and definitions and those established in GB 17691-2005 apply.
3.1
WHTC test (World Harmonized Transient Cycle test)
It refers to the transient cycle including 1,800 working conditions transforming second by second in the Appendix A of this standard.
3.2
Urban vehicles
It refers to the buses, mail cars and sanitation trucks operating in the city.
