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Global Front wheel drive 6 speed Automatic Transmission GEN2소개
최준혁(JunHyuk Choi),권경문(KyungMun Kwon) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Global Front wheel drive 6-speed automatic transmission family(GF6) was launched globally in 2007 from Korea market. Now in average every 15 second GF6 transmission is built in one of the 5 transmission plants in Korea, China, Mexico, Canada and the United States. In recent years, many automotive Company have been striving to increase fuel economy and to decrease CO2 emission. The reduction of CO2 emissions and improvement of fuel economy can be seen as a general market need. With facing this demand, the GF6 family of General Motors transmission has been analyzed for market demand. The second generation of the GF6(GF6 GEN2) can be divided into two major portion. The first upgrade for GF6 GEN2 is control changes. This upgrade is aiming at improving shift quality and fuel economy with multiple changes to the control system and clutches. And, the second upgrade is hardware such as clutch and hydraulic circuit. It had its debut in the Unites states from 2012 and now will be rolled out in over 100 GM vehicle applications with including Korea market.
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미분변환에 의한 가변밀도를 갖는 가변단면 봉의 진동해석
신영재,권경문 국립7개대학공동논문집간행위원회 2001 공업기술연구 Vol.1 No.-
In this paper the Differential Transformation technique is applied to analyze the longitudinal vibration of non - uniform rod with continuously varying density. The governing equation of motion of the non-uniform bar with continuously varying density is derived. The concept of differential transform is briefly introduced. Numerical calculations are carried when the density and area are given by polynomial functions and the natural frequencies of the bar were obtained and analyzed under various boundary conditions by using the differential transformation solutions.
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