Body Air Leakage Improving Methods Research Of JMC V3

1,PrefaceCurrently the competition in the auto market is more and more severe, and one of the key accesses to improve the product competitiveness is to improve the vehicle ride comfort, among which the full vehicle air leakage improvement is the most basic and important way to improve the ride comfort. The paper provides an effective and systematic solution for body air leakage improvement according to the practice to improve JMC V3 vehicle body air leakage during the product development process, for which lots of tests are conducted2,Main ContentsThe paper focuses on the application study of the material and method for the body air leakage improvement, and evaluates according to the index of the body air leakage value.ChapterⅠ: The chapter describes the impact of the body air leakage to each body attribute, and looks into the future according to the history of the body air leakage study.ChapterⅡ: The chapter summarizes the classification of the frequently-used body air leakage material according to the three big processing of body, which are Body, Paint and TCF, and summarizes the application method, related performance requirement and measurement method to each kind of material according to the physical application experience.ChapterⅢ: The chapter explains and calculates in details to the air leakage test instruments and principle, and describes the air leakage test method according to Ford test specification.Chapter IV: The chapter summarizes the body air leakage improvement method during the physical experience in JMC V3 vehicle. It compares the advantage with disadvantage for each kind of sealing method between the side panel and floor; amounts of study and tests are conducted for the relationship between the clearance, which is between the B pillar sealing panel to the inner cavity, and the air leakage performance and e-coat quality, thus it gets the most reasonable compromising value; it studies the contact characteristics and force characteristics of the weather strip and builds the weather strip theoretical model; it studies the door weather strip and clearance, and gets the systematic and effective method to improve the door air leakage.ChapterⅤ: The chapter verifies the importance and effectiveness of the body air leakage improvement and its method by the comparison of the NVH performance, body erosion durability and AC performance between before and after JMC V3 vehicle body air leakage improvement.3,SignificanceThe paper verifies the importance of the body air leakage and effectiveness of its improvement method by the comparison of the NVH performance, body erosion durability and AC performance between before and after JMC V3 vehicle body air leakage improvement, and by lots of tests and study to improve the body air leakage during the physical work for the V3 vehicle, which is developed together by JMC and Ford. It provides the effective and systematic solution for the body air leakage improvement and vehicle quality improvement by the summary.