Ford's answers to the NHTSA 6.7 Investigation
There was a request for a link to Ford's answer's to the NHTSA investigation posted on a previous thread, since closed. Here is the link: Ford's NHTSA Answers to the 6.7 investigation This PDF i...
Forum Discussion
Could there be a hydrostatic phenomena there as the pump and the injectors set up standing waves at certain frequencies / rpms?
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An experimental study on the rail pressure fluctuation characteristics of high-pressure common rail fuel system
Authors: Liu, Xinghua1 ; Fan, Zhiqiang1 ; Gao, Zhuo1
Author affiliation:
1 School of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Beijing 100081, China
Corresponding author: Liu, X.
Source title: Qiche Gongcheng/Automotive Engineering
Abbreviated source title: Qiche Gongcheng
Volume: 32
Issue: 7
Issue date: July 2010
Publication year: 2010
Pages: 575-578
Language: Chinese
ISSN: 1000680X
CODEN: QIGOE4
Document type: Journal article (JA)
Publisher: Society of Automotive Engineers of China (SAE-China), Room 1202, No.1 Baiyunlu, Xicheng District, Beijing, 100045, China
Abstract: By experimental measurement and using fast Fourier transform, the frequency characteristics of rail pressure fluctuation of high-pressure common rail fuel system BOSCH CR under different load conditions are investigated. The results show that with the increase in engine load, the amplitude at the triple frequency of fuel pump rotation frequency increases and will be dominant among all frequency components caused by fuel supply; when load is low, the fuel delivery in each of 3 plungers is slightly different to each other; but when the load goes up, the fuel delivery in 3 plungers tends to be the same.
--------------
An experimental study on the rail pressure fluctuation characteristics of high-pressure common rail fuel system
Authors: Liu, Xinghua1 ; Fan, Zhiqiang1 ; Gao, Zhuo1
Author affiliation:
1 School of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Beijing 100081, China
Corresponding author: Liu, X.
Source title: Qiche Gongcheng/Automotive Engineering
Abbreviated source title: Qiche Gongcheng
Volume: 32
Issue: 7
Issue date: July 2010
Publication year: 2010
Pages: 575-578
Language: Chinese
ISSN: 1000680X
CODEN: QIGOE4
Document type: Journal article (JA)
Publisher: Society of Automotive Engineers of China (SAE-China), Room 1202, No.1 Baiyunlu, Xicheng District, Beijing, 100045, China
Abstract: By experimental measurement and using fast Fourier transform, the frequency characteristics of rail pressure fluctuation of high-pressure common rail fuel system BOSCH CR under different load conditions are investigated. The results show that with the increase in engine load, the amplitude at the triple frequency of fuel pump rotation frequency increases and will be dominant among all frequency components caused by fuel supply; when load is low, the fuel delivery in each of 3 plungers is slightly different to each other; but when the load goes up, the fuel delivery in 3 plungers tends to be the same.
