Affiliations: [a] Institute of Automotive Engineering, University of
Shanghai for Science and Technology, Shanghai, China | [b] College of Automotive Engineering, Shanghai University
of Engineering Science, Shanghai, China
Correspondence:
[*]
Corresponding author: Zhendong Zhang, Institute of Automotive
Engineering, University of Shanghai for Science and Technology, Shanghai
200093, China. Tel.: +86 21 5527 5287; Fax: +86 21 5527 0456; E-mail: usstzzd@126.com
Abstract: A new near-net-shape technology (MIM Technology) has been first
introduced to GDI injector processing expected to solve the problems of
inefficiency, low machining accuracy, low material utilization rate and
unstable performance that exist in traditional processes. In order to improve
the comprehensive performance of GDI injector Fe-based Nano-crystalline, soft
magnetic alloy material has been used, and some structures of the magnetic
circuit parts have been optimized. The excellent machinability, physicochemical
properties, materials applicable of the MIM technology has been analyzed by
tracking test. The comprehensive performances of different GDI injector samples
have been analyzed by simulation analysis and experimental validation. As a
result, the samples which were processed by the MIM technology reduce the skin
effect and eddy current loss by 9.8%, accelerate the starting current rise
rate by 2.5% and shorten the dynamic response time by 14.2%. The dynamic
injection quantity increases by about 2.5%, and the linear range of dynamic
fuel injection quantity is expanded about 9.6%.
