QC/T 809-2009 English PDF (QCT809-2009)

This Standard specifies the technical requirements, test methods, inspection rules, mark, package, transportation, storage etc. of nozzle of gas-fired vehicle.

QC/T 809-2009
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
T47
Nozzle of gas-fired vehicle
ISSUED ON. NOVEMBER 17, 2009
IMPLEMENTED ON. APRIL 1, 2010
Issued by. Ministry of Industry and Information Technology
Table of Contents
Forward ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Requirements ... 6
5 Test method ... 8
6 Inspection rules ... 13
7 Mark, package, transportation and storage ... 14
8 Exit-factory documents ... 15
Annex A ... 17
Annex B ... 18
Annex C ... 20
Annex D ... 21
Forward
This Standard was proposed by National Technical Committee of Auto Standardization. This standard shall be under the jurisdiction of National Technical Committee of Auto Standardization.
Drafting organizations of this Standard. China Automotive Engineering Research Institute Co., Ltd., the First Jiefang Automobile Manufacturing Corp, United Automotive Electronic Systems Co. Ltd., Chongqing Guoneng Investment Co., Ltd.
Main drafters of this Standard. Li Kaiguo, Chen Wanying, Wang Yiguang, Jia Yu, Li Jingbo, Xie Jiming and Wang Kai.
This Standard is issued for the first time.
Nozzle of gas-fired vehicle
1 Scope
This Standard specifies the technical requirements, test methods, inspection rules, mark, package, transportation, storage etc. of nozzle of gas-fired vehicle (hereinafter referred to as nozzle).
This Standard is applicable to the gas-fired nozzle that, under the condition of environment temperature of -40 ~ 120°C, complies with the vehicle compressed natural gas of GB 18047 or that uses the vehicle liquefied petroleum gas in GB 19159 as the working medium.
2 Normative references
The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.
GB/T 191 Packaging - Pictorial Marking for Handling of Goods
GB/T 4942.2 Degrees of Protection Provided by Enclosures for Low-voltage Apparatus GB/T 7762 Rubber, Vulcanized or Thermoplastic - Resistance to Ozone
Cracking-Static Strain Test
GB 9969.1 General Principles for Preparation of Instructions for Use of Industrial Products
GB/T 10125 Corrosion Tests in Artificial Atmospheres - Salt Spray Tests GB/T 17895 Natural Gas Vehicle and Liquefied Petroleum Gas Vehicle – Vocabulary GB 18047 Vehicle Compressed Natural Gas
GB 19159 Automotive Liquefied Petroleum Gas
3.11 Fuel flow error variability
In a pulse width, the ratio OF difference BETWEEN a nozzle’s flow AND the flow average value of the nozzle group within this pulse width TO the average value. 4 Requirements
4.1 General requirements
4.1.1 The nozzle shall be manufactured according to the product drawings and technical documents that are approved by the specified procedure.
4.1.2 The rated voltage of the nozzle is DC 12V or DC 24V.
4.1.3 Minimum opening voltage. the minimum opening voltage, for DC 12V rated voltage, is DC 6V; and the minimum opening voltage, for DC 24V rated voltage, is DC 12V. 4.1.4 Maximum working voltage. the maximum working voltage, for DC 12V rated voltage, is DC 18V; and the maximum working voltage, for DC 24V rated voltage, is DC 36V. 4.1.5 When in power failure, the nozzle is in closing state.
4.1.6 The splash-proof performance of the nozzle shall conform to the regulations of GB/T 4942.2.
4.1.7 The material used for manufacturing nozzle shall be compatible with the fuel used. 4.1.8 The outer surface of the nozzle shall be smooth, without any scratching, etc. 4.2 Performance requirements
4.2.1 Pressure resistance. when the pressure resistance test is carried out according to the test method in 5.3, the leakage or crack is allowed; however, the fracture is not allowed before the leakage.
4.2.2 Electrical characteristics parameters
4.2.2.1 Minimum opening voltage. when it is tested according to the test method in 5.4.1, it shall work normally, without abnormal sound.
4.2.2.2 Maximum working voltage. when it is tested according to the test method in 5.4.2, it shall work normally, without abnormal sound.
4.2.2.3 Maximum response frequency. when it is tested according to the test method in 5.4.3, it must conform to the regulation of product standards of manufacturer. to the requirements of 4.2.3.1, 4.2.3.2 and 4.2.4.1.
4.2.8 Temperature resistance. when it is tested according to the test method in 5.10, it shall conform to the requirement of 4.2.4.
4.2.9 Corrosion resistance
4.2.9.1 After the brazen part in nozzle is tested according to the test method in 5.11.1, there is no obvious damage.
4.2.9.2 After it is tested according to the test method in 5.11.2, it must conform to the requirement of 4.2.4.1.
4.2.10 Ozone resistance. after the rubber part in the nozzle is tested according to the test method in 5.12, there is no crack.
4.2.11 Compatibility. after the nonmetal part in the nozzle is tested according to the test method in 5.13, the volume change rate is not greater than 20%; and the mass decrease rate is not greater than 5%.
4.2.12 Vibration resistance. after it is subjected to 6h of vibration test according to the test method in 5.14, it shall conform to the requirements of 4.2.3.1, 4.2.3.2, 4.2.4.1 and 4.2.6.1.
5 Test method
5.1 Test condition and instrument accuracy
5.1.1 Test condition. unless otherwise specified, the test environment condition and test medium shall conform to the following requirements.
a) Test environment temperature. 15 ~ 35°C;
b) Relative humidity is not greater than 85%;
c) The pressure is 86-106kPa;
d) The medium shall adopt clean dry-air or nitrogen.
5.1.2 Accuracy and range of test instrument. unless otherwise specified, the accuracy and range of the instrument shall conform to the following regulations.
a) Electrotechnical instrument. the accuracy is not lower than level-1.0, the range shall be 1.5 ~ 3 times of the measuring value;
b) Pressure instrument. the accuracy is not lower than level-1.5, the range shall be 1.5 5.5.2 Pulse width flow. the pulse width flow is tested according to the method regulated in annex B.
5.5.3 Flow consistency. the low consistency is tested according to the method regulated in annex C.
5.5.4 Relation between the response time and the voltage. the relation between the response time and the voltage is tested according to the method regulated in annex D. 5.6 Leakage test
The sample inlet is connected with the pneumatic supply by the shut-off valve; the pressure meter or leakage rate testing instrument is installed between the sample and the positive shut-off valve; fill the test gas with rated working pressure into the sample. After the temperature reaches to the test temperature, the positive shut-off valve is closed; the value of the pressure meter within 1min is checked, or 1min leakage rate is measured. The leakage test shall be subjected to external leakage test and internal leakage test. a) External leakage test. the sample outlet is sealed; and the rated power connected with the nozzle is turned on.
b) Internal leakage test. the sample outlet is opened; and the nozzle is not connected with the power.
5.6.1 Normal temperature leakage test. the test temperature is the environment temperature. 15 ~ 35°C;
5.6.2 High temperature leakage test. the test temperature is the high temperature. 120±2°C;
5.6.3 Low temperature leakage test. the test temperature is the low temperature. -40±2°C. 5.7 Drop test
The nozzle falls to the cement ground vertically and freely from 1m of elevation; and then the work characteristic test of the nozzle is carried out according to 5.5.1 and 5.5.2. 5.8 Insulation resistance test
5.8.1 Insulation resistance test. the nozzle is not accessed to the power; the wiring end of the coil is in short circuit; and the insulation resistance between the wiring end of the coil and the shell is measured according to the following condition.
a) The nozzle, of which the circuit is packed by synthetic material not exceeding 3.8mm thickness, is applied with 100V DC voltage; maintain for 60s;
The non-metal parts of nozzle contacting with the fuel are soaked in 23±2°C n-pen...