JB/T 7761.2-1995 Performance test method for automatic advancer of fuel injection pump for diesel engines

JB/T 7761.2-1995 Diesel engine fuel injection pump fuel supply angle automatic advancer performance test method JB/T7761.2-1995 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7761.2-95
Diesel Engine Fuel Injection Pump
Automatic Fuel Supply Angle Advancer
Performance Test Method
Published on 1995-06-16
Ministry of Machinery Industry of the People's Republic of China
Implemented on 1996-07-01
Mechanical Industry Standard of the People's Republic of China
Diesel Engine Fuel Injection Pump
Automatic Fuel Supply Angle Advancer
Performance Test Method
1 Subject Content and Scope of Application
JB/T7761.295
ZBJ94 003—87
This standard specifies the performance test method for the mechanical centrifugal automatic fuel supply angle advancer (hereinafter referred to as advancer) directly connected to the diesel engine injection ticket.
This standard applies to advancers for diesel engine injection pumps. 2 Reference standards
GB3821
GB5770
JB/T50063
ZBJ94016
ZBJ94017bZxz.net
3 Test conditions
Light nest oil
Method for determination of cleanliness of small and medium power internal combustion engines Technical conditions for plunger injection pump assembly of diesel engine Technical conditions for injection pump assembly of automotive diesel engine Diesel engine injection ticket Fuel supply angle automatic advancer assembly Reliability assessment method, bench test method, fault classification and judgment rules
Technical conditions for injection test bench
Technical conditions for standard injector assembly for injection pump test bench3.1 The test bench equipment shall comply with the provisions of ZBJ94016 and ZBJ94017.3.2 The injection pump assembly used for the advancer performance test shall have the same model, number of cylinders and related parameters as the injection pump assembly matched with the advancer, or be tested according to the injection ticket agreed upon by the supply and demand parties.3.3 The injection pump assembly shall comply with the requirements of GB5770 or JB3597.1.3.4 The tester used for the advancer performance test shall be able to ensure the accuracy of the test results, and the test error shall not be greater than 0.2°.3.5 The accuracy of the air pressure gauge used for the sealing test shall not be lower than level 1.5, and the range shall be 0.5MPa. 3.6 The coupling and transmission flange matched with the advancer shall not have any gap in the transmission, and the coaxiality error with the axis of the injection pump after installation shall not exceed 0.20mm
4 Test method
4.1 Sealing test
Introduce 0.10MPa compressed air into the refueling port of the separate lubricating advancer and immerse it in the No. 0 light diesel oil specified in GB252. No leakage shall be allowed within 15s.
4.2 Cleanliness determination
Cleanliness determination method According to the provisions of Chapters 2, 3, 4 and 5 of GB3821, the filter element adopts a filter with a mesh number of 00385. 4.3 Determination of advance angle
Approved by the Ministry of Machinery Industry on June 16, 1995
Implemented on July 1, 1996
JB/T7761.295
4.3.1 The advancer is connected to the injection pump and installed on the injection pump test bench. The lubricating oil used as specified is injected, and the injection pump is placed in the calibrated oil supply position.
4.3.2 The advancer is run-in from the starting speed to the calibrated speed, and then from the calibrated speed to the starting speed. The number of cycles is 5, and the cycle time is 2 minutes each, for a total of 10 minutes. The zero position of the advance angle is set at 200 to 300 r/min lower than the starting speed of the advancer. 4.3.3 When measuring the advance angle, the measurement is carried out in sequence from the starting speed to the calibrated speed, and then from the calibrated speed to the starting speed. When moving to the measuring point, the speed must rise and fall in one direction.
4.3.4 Draw the advance characteristic curve. The curve test points shall be no less than 5 points, including the action point and the calibration point [see Appendix A (reference part)
5 Reliability test
The reliability test method and fault judgment of the advancer shall be in accordance with the provisions of JB/T50063. 2
Additional instructions:
JB/T7761.2—95
Appendix A
Advance characteristic curve of advancer
(reference part)
1 06200300400500600700800900100110012001300Speed ​​t/min
Figure A1 Advance characteristic curve of advance device
This standard is proposed and managed by Wuxi Oil Pump and Nozzle Research Institute of the Ministry of Machinery Industry. This standard is jointly drafted by Wuxi Oil Pump and Nozzle Research Institute of the Ministry of Machinery Industry and Longkou Oil Pump and Nozzle Co., Ltd. The main drafters of this standard are Cao Huirong, Shang Ruiyun, Liu Jianguo, 3
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