JJF 1221-2009 (English Version) PDF

Standard No.: JJF 1221-2009
Language: Chinese, Available in English version
Release Date: 2009
Published By: National Metrological Technical Specifications of the People's Republic of China
Latest: JJF 1221-2009

Scope: This specification specifies the measurement characteristics, calibration conditions, calibration items and calibration methods of the chassis dynamometer for automobile exhaust pollutant detection (hereinafter referred to as the chassis dynamometer). This specification is applicable to the calibration of chassis dynamometers for exhaust pollutant detection using the steady-state operating condition method, the simple transient operating condition method, and the loading and deceleration operating condition method for compression-ignition engine vehicles.

JJF 1221-2009 Referenced Document

GB 18285-2005 Limits and measurement methods for exhaust pollutants from vehicles equipped ignition engine under two-speed idle conditions and simple driving mode conditions
GB 3847-2005 Limits and measurement methods for exhaust smoke from C.I.E. (Compression Ignition Engine) and vehicle equiped with C.I.E.

2009 JJF 1221-2009 Calibration Spectification for Chassis Dynamometers for Automobile Emission Testing
1970 JJF 1221-1990 903.89~1337.58K temperature sub-reference operation technical specification