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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.
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.
순간중심을 이용한 평면 3 자유도 자동차 모델의 롤 운동 해석
이재길(Jaekil Lee),심재경(Jaekyung Shim) 한국자동차공학회 2006 한국 자동차공학회논문집 Vol.14 No.4
In this paper, a planar car model with 3 degrees of freedom was analyzed using the concept of the roll center. To avoid ambiguity, force components which require experimental data were excluded. Only kinematic approach was used to find the position and orientation of the vehicle body and the position of the roll center. The roll center was found by the pole with infinitesimal movement and Kennedy-Aronhold theorem. Centrodes, which are the loci of instantaneous centers of planar motion, were constructed with analyzed results to show characteristics of vehicle body motion. To verify the presented analysis method in this paper, the locus of the roll center and the motion of a 3 D.O.F. planar car model were compared with those of the 1 D.O.F. model.
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.
순간중심을 이용한 평면 3 자유도 자동차 모델의 롤 운동 해석
이재길(Jaekil Lee),심재경(Jaekyung Shim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2
In this paper, a planar car model with 3 degrees of freedom was analyzed using the concept of the roll center. To avoid ambiguity, force components which require experimental data were excluded. Only kinematic approach was used to find the position and orientation of the vehicle body and the position of the roll center. The roll center was found by the pole with infinitesimal movement and Kennedy-Aronhold theorem. Centrodes, which are the loci of instantaneous centers of planar motion, were constructed with analyzed results to show characteristics of vehicle body motion. To verify the presented analysis method in this paper, the locus of the roll center and motion of the 3 D.O.F planar car model were compared with those of the 1 D.O.F model.