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JJF 1221-2009 English PDF

US$439.00 · In stock
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JJF 1221-2009: Calibration Specification for Chassis Dynamometers for Automobile Emissions Testing
Status: Valid

JJF 1221: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1221-2009	English	439	Add to Cart	4 days [Need to translate]	Calibration Specification for Chassis Dynamometers for Automobile Emissions Testing	Valid	JJF 1221-2009
JJF 1221-1990	English	199	Add to Cart	2 days [Need to translate]	O.T.N.of Temperature Secondary Primary Standard in the Range from 903.89 to 1337.58K	Obsolete	JJF 1221-1990

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Basic data

Standard ID	JJF 1221-2009 (JJF1221-2009)
Description (Translated English)	Calibration Specification for Chassis Dynamometers for Automobile Emissions Testing
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A53
Classification of International Standard	17.100
Word Count Estimation	19,178
Date of Issue	2009-07-10
Date of Implementation	2009-10-10
Quoted Standard	GB 18285-2005; GB 3847-2005
Regulation (derived from)	AQSIQ Announcement No. 78 of 2009
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This standard specifies the automobile exhaust emission testing on a chassis dynamometer (hereinafter referred to as the chassis dynamometer) of the metrological characteristics, calibration conditions, the calibration program and calibration methods. This standard applies to point tender engine car steady condition method, simple transient conditions and compression-ignition engine vehicles slow loading of exhaust emission testing on a chassis dynamometer calibration.

JJF 1221-2009: Calibration Specification for Chassis Dynamometers for Automobile Emissions Testing

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Calibration Specification for Chassis Dynamometers for Automobile Emissions Testing People's Republic of China National Metrology Technical Specifications Automobile exhaust pollutant detection chassis Dynamometer calibration specification Posted 2009-07-10 2009-10-10 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Automobile exhaust pollutant detection chassis Dynamometer calibration specification This specification by the State Administration of Quality Supervision, Inspection and Quarantine approved on July 10, 2009, and from From October 10, 2009 into effect. Focal point. the National Technical Committee of Legal Metrology measurement management Main drafting unit. Henan Institute of Metrology Participated in the drafting. Zhejiang Jiangjiang Xing Automobile testing equipment factory Zhejiang Institute of Metrology Beijing Institute of Metrology detection Shijiazhuang Huayan Transportation Technology Co., Ltd. Foshan City, South China Instrument Co., Ltd. This specification managed by the National Technical Committee of Legal Metrology measurement responsible for interpreting The main drafters of this specification. Liu Wei (Henan Institute of Metrology) Zhu Weimin (Henan Institute of Metrology) Zheng Li (Henan Institute of Metrology) Drafters participate. Zhoushen Sheng (Zhejiang Jiangjiang Xing Automobile testing equipment factory) Jin Yan (Zhejiang Institute of Metrology) Chen Xi (Beijing Institute of Metrology detection) Chen Nanfeng (Shijiazhuang Huayan Transportation Technology Co., Ltd.) Yang Yaoguang (Foshan City, South China Instrument Co., Ltd.)

1 Scope (1) 2. Referenced Documents (1) 3 Terms (1) 4 Overview (1) 5 Metrological characteristics (1) 5.1 roller apparatus (1) Speed 5.2 (1) Torque 5.3 (2) 5.4 Basic inertia (2) 5.5 Constant load loading coasting time (2) 5.6 Variable load loading coasting time (2) 5.7 Internal power loss (2) 5.8 load response time (2) Calibration Condition 6 (2) 6.1 environmental conditions (2) 6.2 Measurement Standard and calibration equipment (2) 7 calibration items and calibration methods (2) 7.1 calibration items (2) 7.2 Calibration method (3) 8 calibration results expression (9) 8.1 calibration certificate (9) 8.2 calibration measurement uncertainty (9) 9 Recalibration interval (9) Appendix A calibration certificate (10) Appendix B Uncertainty Analysis of Calibration Results (12) Automobile exhaust pollutant detection chassis dynamometer calibration specification

1 Scope

This specification provides automobile exhaust pollutant detection chassis dynamometer (hereinafter referred to as the chassis dynamometer) special metering Sex, calibration conditions, calibration items and calibration methods. This instruction applies to vehicles equipped ignition engine method transient operating conditions, transient conditions law and simple compression-ignition engine vehicles Loading condition reduction of exhaust emission detected by the chassis dynamometer calibration.

2 Citations

GB 18285-2005 ignition engine exhaust emission limits and measurement methods (two-speed idle and BASM) GB 3847-2005 vehicle measuring compression-ignition engines and compression-ignition engine vehicle exhaust and smoke emission limits method When using this specification it should be noted that using the currently valid version of the documents cited.

3 Terms

3.1 The basic chassis dynamometer inertia DIW (dynamometerinertiaweight) Inertia simulation device simulation cars Zhongping moment of inertia of the equivalent quality of the car, called the equivalent inertia; and chassis Equivalent inertia dynamometer all rotating parts equivalent called basic chassis dynamometer inertia. 3.2 main drum mainroler And power absorption drum coaxial connector device.

4 Overview

Chassis dynamometer is used to simulate the vehicle when the vehicle exhaust emission condition was detected when the actual traveling road Inertia and resistance of special measuring equipment. Chassis dynamometer consists of the following components. means (PAU) and its controller, drum power absorption device, Mechanical inertia, drive motor, synchronous devices, measuring devices, speed measuring device, lifting devices, the lateral spacing means Is set, the display device and the like.

5 Metrological characteristics

5.1 roller apparatus 5.1.1 main drum diameter tolerance. ± 0.5%. 5.1.2 master cylinder surface radial runout of not more than 0.2%. 5.1.3 parallel bus around rollers not more than 1mm/m. 5.2 speed Main drum line speed tolerance. ± 0.2km/h or ± 0.5%.

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