http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
SPMD를 이용한 half-car 모델의 롤 운동 해석
박시준(Sijun Park),심재경(Jaekyung Shim),임득재(Deukjae Im),이재길(Jaekil Lee) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In this paper, I suggest a method of estimate half-car model’s roll capacity using the measured trace of kinematic roll center that is an instant center of velocity from a data of wheel motion, on fixed ground, with SPMD. The trace of roll center found out from proposed method, drew on the coordinate of reference fixed on the surface which called fixed centrode, and the trace of wheel drawn on the moving coordinate reference that fixed on a car body is called moving centrode. These are able to be seized the vehicle’s kinematical roll characteristic except compliance effects by bush of suspension system under the shape of fixed and moving centrodes. We verify availability of this paper with comparison between the roll center when suspension system geometry is given and another roll center using SPMD data which is proposed in this paper. Also, I compare with roll center which is measured from SPMD
조민석(Minseok Jo),심재경(Jaekyung Shim),곽승우(Seungwoo Kwak),임득재(Deukjae Im),나병철(Byungchul Na) (사)한국CDE학회 2013 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2013 No.8
A fuel injector is an automotive part that supplies fuel into the cylinders of an internal combustion engine. An injector, in general, consists of various parts such as control valve bodies, pistons, needles, nozzle bodies, and bodies inside of which have fuel passage where highly pressurized fuel passes through. The pressurized fuel inside the fuel passage causes stresses and deformations of the bodies and parts of the injector, which may result in the failure or malfunction of the injector. In this paper, the stress distribution and deformation of a 2,000bar diesel fuel injector bodies are analyzed using finite element method.
조민석(Minseok Jo),심재경(Jaekyung Shim),곽승우(Seungwoo Kwak),임득재(Deukjae Im),나병철(Byungchul Na) (사)한국CDE학회 2014 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2014 No.2
Diesel fuel injectors work by transferring fuel from the supply line to the fuel injector device which is attached to each cylinder where it is pressurized and then sprayed through a small nozzle into the cylinder"s combustion chamber. While a diesel fuel injector working, the highly pressurized fuel inside the fuel passage can cause the stress and deformation of parts of the injector and by extension, it may be a cause of malfunction of the injector. In this paper, the stress distribution and deformation of a 2,000bar diesel fuel injector model2 are analyzed using finite element method and compared with model1 for suggestion of better design.
임필혁(Peelhyuk Lim),심재경(Jaekyung Shim),권진욱(Jinwook Kwon),임득재(Deukjae Im) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In this paper, the method of type synthesis about variable 2 DOF mechanisms is developed by using kinematical graph theory. The method is applied to Continuously Variable Valve Lift mechanisms used in vehicle. Most of the Variable mechanisms that are able to control a relation between input and output under operating conditions have two degree of freedom. On the average, mechanisms with 2 DOF have more links and joints than mechanisms with 1 DOF and the number of graphs that are considered increases, so a type synthesis of 2 DOF mechanisms is difficult. To overcome these difficulties, the type synthesis is operated as follows in this study. Before anything else, graphs of 1 DOF mechanisms with up to 6 links and 2 or 3 independent loops are enumerated. After, by adding links and joints or changing the lower pair to the higher pair, we enumerate graphs of 2 DOF mechanisms which have up to 7 links and 2 or 3 independent loops and satisfy the condition of mechanisms for synthesis. Using formulated graphs, we are easily able to synthesize the CVVL mechanisms which are presently on a commercial scale. Moreover, it is possible to synthesize the new variable mechanisms.
이희성(Heesung Lee),심재경(Jaekyung Shim),권진욱(Jinwook Kwon),임득재(Deukjae Im) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Global environmental issues in recent years have brought more rigorous demands to improve the environmental performance of passenger car engines. The aim of this paper is to develop the kinematic skeleton of a Variable Compression Ratio(VCR) engine mechanism for automobiles. For this, types of two degrees of freedom (DOF) variable mechanisms are synthesized by using kinematic graph theory. In general, since a two DOF variable mechanism has more than one independent loop, the numbers of links and joints of a variable mechanism is higher than an one DOF mechanism; its kinematic synthesis is more difficult. In this paper, graphs of two DOF variable mechanism with up to two independent loops are enumerated and the result of type synthesis is applied to the synthesis of a VCR engine mechanism.
박미란(Miran Park),심재경(Jaekyung Shim),이재길(Jaekil Lee),권진욱(Jin Wook Kwon),임득재(Deukjae Im) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In this paper, the compliance screw axes of multi-link, double wishbone, and McPherson type suspensions are found by using the analytical method using screw theory. The compliance screw axis is obtained by the linear combination of the twist axes which are obtained by releasing the constraint wrench that acts through each link. Static analysis is performed to find the coefficients of the linear combination. The compliance screw axes of the multi-link, double wishbone, and McPherson suspension are compared with the kinematic steering axes of the systems.