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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Transactions of the Korean Society of Automotive Engineers
Journal Basic Information
Journal DOI :
The Korean Society of Automotive Engineers
Editor in Chief :
Volume & Issues
Volume 13, Issue 6 - Nov 2005
Volume 13, Issue 5 - Sep 2005
Volume 13, Issue 4 - Jul 2005
Volume 13, Issue 3 - May 2005
Volume 13, Issue 2 - Mar 2005
Volume 13, Issue 1 - Jan 2005
Selecting the target year
A Study on Contact Deformation of Automotive Door Weatherstrip Using Non-linear Finite Element Method
Kim Byung Soo ; Moon Byung-Young ; Kim Kwang-Hoon ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 1~7
In vehicle door system, weatherstrip seals protect passengers form noise, dust, rain and wind out of the vehicle. The higher efficient a weatherstrip is, the more durable it is in contact between the door and body frame. In this study, nonlinear finite element(FE) analysis is performed to obtain cauchy-stresses, displacements and reaction forces of the weatherstrip. Mechanical properties of the weatherstrip is obtained by uniaxial tension test. The MARC which is a commercial software for the nonlinear analysis of a flexible FE model is used. Twenty-one cases of the FE model are developed by using Ogden-foam formulation. In the results of nonlinear FE analysis, the most valuable deformation of the weatherstrip occurred when displacement control value reaches 7.2mm. Severe deformation is observed as the displacement control value become more increased. When the weatherstrip is designed, it would be considered that the displacement value of the weatherstrip has to be less than 7.2mm.
Pedestrians Trajectory Characteristic for Vehicle Configuration and Pedestrian Postures
Yoo Jangseok ; Park Gyung-Jin ; Chang Myungsoon ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 8~18
Pedestrians involved in traffic accidents manifest unique trajectory characteristics depending on the collision speed, vehicle configuration, and pedestrian postures. However, the existing analytical models for pedestrian movements do not fully include the rotational characteristics of the pedestrians because they assume a two dimensional parabolic trajectory. This faulty assumption in the development of these models limits their applicability and reliability This study investigated the pedestrians movement at collision by computer simulation. The simulations are carried out by using HADYMO, which is a special simulation software system for dynamic movement analysis. Vehicles and pedestrians are modeled and verified via real crash worthiness experiments. Simulations are performed for various collision speeds, vehicle configuration, and pedestrian postures. Since the simulation uses multi-body dynamics, It can express irregular phenomena of the bodies quite well. The results can be exploited for vehicle design and traffic accident reconstruction.
Development of Vision-based Lateral Control System for an Autonomous Navigation Vehicle
Rho Kwanghyun ; Steux Bruno ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 19~25
This paper presents a lateral control system for the autonomous navigation vehicle that was developed and tested by Robotics Centre of Ecole des Mines do Paris in France. A robust lane detection algorithm was developed for detecting different types of lane marker in the images taken by a CCD camera mounted on the vehicle.
that is a software framework far developing vision and data fusion applications, especially in a car was used for implementing lane detection and lateral control. The lateral control has been tested on the urban road in Paris and the demonstration has been shown to the public during IEEE Intelligent Vehicle Symposium 2002. Over 100 people experienced the automatic lateral control. The demo vehicle could run at a speed of 130km1h in the straight road and 50km/h in high curvature road stably.
Study on the Parameters to Decrease the Torque in ITR Part
Choi Seogou ; Kim In Ho ; Lim Seong Joo ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 26~31
ITR(Inne. Tie Rod) is one of the core parts in an automobile steering system. The front wheels are connected to the steering system, which are controlled by steering wheel through the ITR. Improvement of assembling ITR is needed f3r drivers' satisfaction. Therefore, the parameters influencing the rotational torque were studied and analyzed. The useful results can be obtained, and could be applied to manufacture ITR. Through these manufacturing technologies, high quality ITR have been manufactured with high productivity.
A Study on Development of Test Methodology and Test of No Spin Differential for Off-road Vehicle
Pyoun Youngshik ; Jang Youngdo ; Park Jeonghyeon ; Cho Inho ; Lee Youngchun ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 32~38
Two No Spin Differential(NSD) models were benchmarked for a project of Dual-Use Technology The Axiomatic approach was utilized to evaluate two models and to derive an evolutionary design from the evaluated results. Test methodology is developed and used to evaluate the mobility, steerability, durability and noise of the newly developed sample. The test results of NSD sample on the test methodology are very positive regarding functional performances.
Finite Element Analysis of Engine Cylinder Block and Main Bore for Reliable Design
Yang Chulho ; Han Moonsik ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 39~48
Finite element analyses have been performed for the purpose of obtaining the robust and reliable design of engine cylinder block. Fatigue under high cycle operating loads is a primary concern and is evaluated by a probabilistic method. The robust and reliable design by a probabilistic method can provide satisfactory design conditions for the performance of the system under the influence of noise factors. Therefore, the design by this method will be desensitized to the uncontrollable noise factors. The simple methodology evaluates the distortion of main bore is proposed for the purpose of maintaining a well-controlled clearance between the crankshaft and main bores. The proposed methodology has proven a capability of predicting the distortion of the main bore under assembly, thermal, and firing loads. The calculated results are correlated well with the experimental ones.
Numerical Analysis of Flow Characteristics in Swirl Chamber Type Diesel Engine
Kwon Taeyun ; Choi Gyeungho ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 49~57
In this study, in-cylinder flow of the swirl chamber type diesel engine numerically simulated by VECTIS code. The flow fields during the intake and compression process were also investigated in detail. Numerical results revealed that the generation and distortion of the swirling, tumbling vortices and those influences on turbulence kinetic energy by shape of the jet passage, angle and area. It was also found that flow characteristics were affected by inflow velocity that depends on change of the jet passage shape. Swirl ratio was increased according to decrease of jet passage area, and was affected by piston motion according to increase of jet passage angle. Tumbling vortices had the similar in various cases, but tumble ratio was increased with the inflow velocity. The generation of turbulence kinetic energy was considerably influenced by complex effects of swirling and tumbling vortices.
Measuring Angular Speed and Angular Acceleration for Automotive Windshield Wiper Pivot
Lee Byoungsoo ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 58~65
A method measuring angular speed and estimating angular acceleration of an automotive wind shield wiper pivot with limited resources has been proposed. Limited resources refer to the fact that processes cannot be operated in real-time with a regular notebook running a Microsoft Windows. Also, they refer to the fact that data acquisition cards have only two general purpose counters as many generic cards do. An optical incremental encoder has been employed for measuring angular motion. To measure the angular speed of the pivot, periods for the encoder's output pulses have been measured as the speed is related to the reciprocal of the period. Since only information acquired from one counter channel is the magnitude of the angular speed, sign correction is necessary. Also the information for the exact time when a pivot passes left and right dead points is also missing and the situation is inherent to the hardware setup. To find out the zero-crossing time of the angular speed, a linear interpolation technique has been employed. Lastly, to overcome the imperfection of the mechanical encoders, the angular speed has been curve fitted to a spline. Angular acceleration can be obtained by a differentiation of the angular speed.
Computational Analysis of Flow Characteristics of a PCV Valve
Lee Jong Hoon ; Choi Yoon Hwan ; Lee Yeon Won ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 66~73
A great deal of exhaust gas inside a combustion room goes out through exhaust pipe. But residual gas 'Blowby gas' enters the crankcase through a small gap between the piston and the cylinder wall. Here, if the blowby gas isn't vented, this causes many bad efffcts such as lubricant oil contamination, corrosion by that and crankcase explosion by rising pressure. So most automobiles are constituted with a PCV(Positive Crankcase Ventilation) system to prevent previous problems. PCV valve is the most important part in this ventilation system. When companies are manufacturing new cases, engineers are designing it depending on their experiments than theoretical knowledges. Much efforts and times are needed for new development. This study will show quantitative results to increase the possibilities for the optimal design.
A Study on the Improvement of Misfire Detection Method with Vibration by using the Weight Factor
Lim Jihoon ; Lee Taeyeon ; Kim Ealgoo ; Hong Sungrul ; Sung Jinho ; Park Jaehong ; Yoon Hyungjin ; Park Jinseo ; Kim Dongsun ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 74~80
This paper presents a misfire monitoring method by using the weight factor. According to OBD II(On-Board Diagnostics) regulations of the CARB (California Air Resources Board), an ECU (Electronic Control Unit) should detect misfires which occur in the internal combustion engine. A misfire is 1311owe4 by post-oscillations for short duration. Sometimes, the amplitude of oscillations may be as high as misfire and can be falsely detected as another misfire. To prevent this, the software designers do not attempt to detect another misfire for this short duration, during which the post oscillations exist. Because of this, ECU does not detect all the misfires and hence, the unstable state of automobile cannot be detected. If this happens for a long time, automobile may get damaged. To solve these problems, this paper suggests a new algorithm to detect misfire by using weighting factor Weighting factor is a concept to distinguish the misfire with the post oscillation and to improve the detection rate. This value of weighting factor is used for counting the misfire. This paper also shows the result of experiment done on a automobile using this software. The software is implemented using ASCET-SD which is preferred in the design of engine control. This paper's result show the possibility of improving the misfire detection by implementing this algorithm.
Design Optimization of Auto-body Members for Crashworthiness Enhancement with the Response Surface Method
Na Sungyul ; Song Junghan ; Huh Hoon ; Kim Hyunsub ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 81~89
The response surface method is the statistical method which can be applied to the non-sensitivity based optimization. The response surface which is constructed by the least square method contains only the polynomial terms so that the global maximum and minimum points are easily obtained. In this paper, this response surface method is utilized to optimize the crashworthiness of auto-body members. As the first step, the thickness of a simple circular tube is optimized to confirm the application of the response surface method to the crashworthiness. Optimization of the thickness on the front side member is, then, performed with the constructed response surface of the absorbed energy and deformation. Optimization results demonstrate that the absorbed energy and the deformation pattern of the front side member is improved in the viewpoint of enhancement of the crashworthiness.
Exhaust Gas Temperature and Combustion Stability Variation due to Changes in Spark and Exhaust Valve Timings
Kim Duksang ; Park Youngjoon ; Yang Changsuck ; Cho Yong-Seok ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 90~96
The improvement of combustion stability is very important because it is closely related to the exhaust emission concentrations as well as the fuel consumption during the cold start of SI engine. In our previous studies, the spark and exhaust valve timings were retarded individually from the baseline case to increase the exhaust gas temperature far fast warmup of a close-coupled catalyst. In the study, it was found that combustion stability during cold start becomes worse when the valve timing is retarded from the baseline conditions. The spark and valve timings were simultaneously changed from the baseline conditions to find out the variation of combustion stability during cold start of an Sl engine. Through the study. retarded spark timing by
CA helps improvement of
increase of exhaust temperature. Retarded exhaust valve timing makes the exhaust gas temperature increase by
, but it also deteriorates the
Development of A Vision-based Lane Detection System with Considering Sensor Configuration Aspect
Park Jaehak ; Hong Daegun ; Huh Kunsoo ; Park Jahnghyon ; Cho Dongil ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 97~104
Vision-based lane sensing systems require accurate and robust sensing performance in lane detection. Besides, there exists trade-off between the computational burden and processor cost, which should be considered for implementing the systems in passenger cars. In this paper, a stereo vision-based lane detection system is developed with considering sensor configuration aspects. An inverse perspective mapping method is formulated based on the relative correspondence between the left and right cameras so that the 3-dimensional road geometry can be reconstructed in a robust manner. A new monitoring model for estimating the road geometry parameters is constructed to reduce the number of the measured signals. The selection of the sensor configuration and specifications is investigated by utilizing the characteristics of standard highways. Based on the sensor configurations, it is shown that appropriate sensing region on the camera image coordinate can be determined. The proposed system is implemented on a passenger car and verified experimentally.
Nonlinear Dynamic Simulation using SIMULINK
Kim Seong Keol ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 105~112
Analyses of dynamic models which were one and two degrees of freedom, and had the nonlinear springs and dampings with certain polynomial functions were performed from SIMULINK in MATLAB. Those consisted of 12 programs and were built on the basis of the preceding programs fur the linear dynamic simulations. However the programs for the nonlinear simulations were quite different from those f3r the linear ones, and showed the results of the analyses in real time with animating. It was found that the programs would help us to solve any kind of nonlinear dynamic simulation with one and two degrees of freedom. Especially, the simulations for 1 DOF system with cubic nonlinear spring farce showed the results for Duffing's equation, of which phenomena were jump-up and jump-down. It will be applied to the dynamic simulation of the car seat vibration with a passenger, of which model has the equivalent nonlinear springs and is two degrees of freedom.
An Experimental Study on the Characters of Bullet Proof for Al and Ti Alloy
Sohn Se Won ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 113~120
In order to investigate the characteristics of penatration and the effect of surface treatment in A15052-H34, Al5082-Hl31 and titanium alloy laminates which were treated by anodizing and PVD(Physical Vapor Desposition) method, ballistic tests were conducted. Thickness of surface membrane in A15052-H34, Al5082-Hl31, were
and that of titanium
respectively. Surface hardness test was conducted using micro Vicker's hardness tester. Resistance to penetration is determined by the protection ballistic limit(V50), a statistical velocity with
probability for complete penetration. Fracture behaviors and ballistic tolerance, described by penetration modes, are observed from the results of V50 test and Projectile Through Plate(PTP) test at velocities greater than protection ballistic limit, respectively. Present experimental results derived from this research help to optimize laminate impact behavior by varing the laminate thickness and surface treated materials.
Analysis of Ride Comfort for an Automobile with flexible Vehicle Body
Kim Junghoon ; Choi Kwangsung ; Park Sungyong ; Lee Jangmoo ; Kang Sangwook ; Kang Juseok ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 121~128
In most researches on the ride comfort analysis of passenger vehicles, the flexibility of the vehicle body has been not considered as an important factor, because the resonance frequencies of the vehicle body related to pitching, yawing and rolling motions are below 10Hz while the resonance frequencies of the vehicle body related to the flexibility are above 20Hz approximately. Nevertheless, the paper shows that the consideration of the local flexibility (or local stiffness) of the 4 corners on which shock absorbers are mounted influences the ride comfort. A simple beam model is devised to qualitatively examine the effect of the change of the local stiffness of the vehicle body on the ride comfort. Based on the results obtained from the analysis of the one-dimensional model, multi-body dynamic analysis considering the flexibility of the vehicle body is performed using ADAMS and MSC/NASTRAN. Natural frequencies and mode shapes computed by MSC/NASTRAN are used as input data for multi-body dynamic analysis in ADAMS. Through simulations using ADAMS, it has been found that the ride comfort can be improved by changing the local stiffness of the vehicle body and that the simulation results agree with experiment results.
Crushing Test of the Double Hat-shaped Members of Dissimilar Materials by Seining Methods
Lee Myeong-Han ; Park Young-Bae ; Kim Heon-Young ; Oh Soo-Ik ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 129~134
There is a strong industrial demand for the development of light-weight vehicle to improve fuel efficiency and dynamic performance. The effective method of achieving the weight reduction is to use low-density materials such as aluminum and magnesium. In applying these materials to the vehicle, it is often required to join dissimilar materials such as aluminum and steel. However, conventional joining method, namely resistance spot welding cannot be used in joining dissimilar materials. Self·piercing rivet(SPR) and adhesive bonding is a good alternative to resistance spot welding. In this study, the impact test of double hat-shaped member made by resistance spot welding, SPR and adhesive bonding was performed. As a result, various parameters of crashworthiness were analyzed and evaluated. Also, the applicability of SPR and adhesive bonding as an alternative to resistance spot welding was suggested.
Effects of Intake Swirl and Combustion Parameters on the Performance and Emission in a V8 Type Turbocharged Intercooler Diesel Engine
Yoon Junkyu ; Cha Kyungok ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 135~144
The Effects of intake swirl and combustion parameters on the performance and emission characteristics in a V8 type turbocharged intercooler D.I. diesel engine of the displacement
were studied experimentally in this paper. Generally the swirl in the combustion process of diesel engine promotes mixing of the injection fuel and the intake air. Also, TCI diesel engine is put to practically use intercooler in order to increase boost efficiency which is cooled boost air. As a result of steady flow test, when the swirl ratio is increased, the mean flow coefficient is decreased, whereas the Gulf factor is increased. And through engine test, its can be effected to meet performance and emission by optimizing the main parameters; the swirl ratio is 2.25, compression ratio is 17.5, combustion bowl is re-entrant
, nozzle hole diameter is
, injection timing is BTDC
and turbocharger is T02 model which are compressor 0.6A/R+46trim and turbine 1.0A/R+57trim.
Performance Characteristics of CNG Engine at Various Compression Ratios
Kim Jin-young ; Ha Jong-yul ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 145~151
Natural gas is one of clean fuels that can replace petroleum-based fuels, because it has low exhaust emission, comparatively high thermal efficiency and abundant deposits. In this addition, owing to high octane number and wide lean flammability limit, it has a strong point to increase the compression ratio. For this reason, the research is being actively executed to increase the generating power and thermal efficiency of the engine by raising the compression ratio through utilization of high octane number relevant to development of CNG engine. In this study, 0.63L single cylinder diesel engine has been used to alter easily compression ratio. Compression ratio has gotten under control by modifying the thickness of gasket between cylinder head and block without major structural modifications. As the result, as compression ratio has increased, generating power and fuel consumption ratio have been improved. As for emission concentration, as compression ratio has increased, THC concentration has been decreased while exhause concentration of NOx increased. In case compression ratio has excessively increased, brake output decrease and cycle variation have been increased. As the result acquired by analyzing brake output, fuel consumption ratio, cycle variation and exhaust, the engine driving condition has acquired
as the optimal compression ratio in this study
The Developement of Moving Bandpass Filter for Improving Noise Reduction of Automative Intake in Rapid Acceleration Using ANC
Jeon Kiwon ; Oh Jaeeung ; Lee Choonghui ; Abu Aminudin ; Lee Jungyun ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 152~159
The method of induction noise reduction can be classified by using passive control or active control method. However, the passive control method has a demerit to reduce the effect of noise reduction to low frequency (below) 500Hz) range and to be limited in a space of the engine room. Whereas, the active control method can overcome the demerit of passive control method. The algorithm of active control is mostly used in LMS (Least-Mean-Square) algorithm because it can obtain the complex transfer function easily in real-time. Especially, Filtered-X LMS (FXLMS) algorithm is applied to an ANC system. However, the convergence performance of LMS algorithm could not match if the FXLMS algorithm is applied to an active control of the induction noise under rapidly accelerated driving conditions. So, in order to solve the problem in this study, the Moving Bandpass Filter(MBPF) was proposed and implemented. The ANC using MBPF for the reduction of the induction noise shows that more noise reduction as 4dB than without MBPF.
Strength Analysis of Luggage Intrusion into Recreational Vehicle Seat
Bae Jinwoo ; Kang Sungjong ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 160~166
In recent, recreational vehicles, which efficiently provide wide inner space for various utilities, are highly preferred in automobile market. Though those vehicles enable to load much luggage in space behind the last seat, in case of frontal impact with high velocity the luggage strongly collides into the seat back and the passengers in. the last seat could be severely injured. Therefore, high strength against luggage intrusion is required for the last seat, and it is regulated by law of ECE R17. In this study, for a recreational vehicle under developing, an analysis technique for simulating seat crash in accordance with luggage intrusion test of ECE R17 was investigated. The results exhibited good correlation with the test ones.
A Study on the Combustion Optimization of a Common Rail Direct Injection Diesel Engine for Regeneration of the Diesel Particulate Filter
Kang Jung Whun ; Kim Man Young ; Youn Gum Joong ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 167~173
Thermal regeneration means burning-off and cleaning-up the particulate matters piled up in DPF(diesel particulate filter), and it requires both high temperature
and appropriate concentration of oxygen at DPF entrance. However, it is not easy to satisfy such conditions because of the low temperature window of the HSDI(high speed direct injection) diesel engine(approximately
at cycle). Therefore, this study is focused on the method to raise temperature using the trade-off relation between temperature, oxygen concentration, and the influence of many parameters of common rail injection system including post injection. After performing an optimal mapping of the common rail parameters for regeneration mode, the actual cleaning process during regeneration mode is investigated and evaluated the availability of the regeneration mode mapping through regenerating soot trapped in the DPF.
Fatigue Crack Growth Characteristics of
Alloy Composites for Automotive Structures
Koh Seungkee ; Lee Haemoo ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 174~181
In order to investigate the behavior of fatigue crack growth of SiC-particulate- reinforced Al-Si alloy composites, fatigue tests using single edge notched tension(SENT) specimens were performed. Composite materials were manufactured by using both permanent die casting and extrusion processes with different volume fractions of
Al-Si composites showed the increased levels of threshold stress intensity factor range,
, for the increased volume fractions of SiC particles, which implies the increased fatigue crack growth resistance at the threshold or low
levels, compared to the unreinforced Al-Si alloy. In the Paris region, however, the composites showed the increased rate of crack growth resulting in the unfavorable effects on the fatigue crack growth resistance. Critical stress intensity factor range at unstable crack growth leading to final fracture decreased as the volume fraction of SiC particle increased, because of the reduced fracture toughness of the composites. Extruded materials showed higher threshold and critical values than the cast materials.
Effect of Premixed Fuels Charge on Exhaust Emission Characteristics of HCCI Diesel Engine
Kim Myung Yoon ; Yoon Young Hoon ; Hwang Suk Jun ; Kim Dae Sik ; Lee Chang Sik ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 182~189
In order to investigate the effect of premixed gasoline, diesel fuel, and n-heptane charges on the combustion and exhaust emission characteristics in a direct injection (DI) diesel engine, the experimental studies are performed. The premixed fuels are injected into the premixing chamber that installed upstream of the intake port in order to minimize the inhomogeneity effect of premixed charge. The injection nozzle for directly injected fuel is equipped in the center of the combustion chamber. The air temperature control system is equipped in the intake manifold to examine the effect of air temperature. The experimental results of this study show premixing fuel is effective method to reduce the NOx and soot emissions of diesel engine. NOx emissions are linearly decreased with increasing premixed ratio for the three kinds of premixed fuels. The heating of intake air
reduced the deterioration of BSFC in high premixed ratio, because it promotes evaporation of premixed diesel droplet in the premixing chamber.
A Study on the Estimation of Separation Forces of a Power Steering Hose Assembly
Kim Hyungje ; Kim Byungtak ; Yoon Moonchul ;
Transactions of the Korean Society of Automotive Engineers, volume 13, issue 4, 2005, Pages 190~196
The power steering hose assembly is usually manufactured through the swaging process, which is conducted to connect a hose with metal fittings. In this process the hose is inserted into metal components, the sleeve and the nipple, and compressed in the radial direction by the jaws to clamp the hose with metal components. In case that the clamping force is small, the oil in the hose can leak locally under the severe operating conditions. To confirm the clamping force requirements, the measurement of separation force in longitudinal direction of the hose is usually performed. In this study, the swaging process of a hose is simulated with the finite element method, to investigate the effect of friction coefficient on the separation fDrce. The results interpretations are ffcused on the inner rubber component, and also a formula is proposed to estimate the separation farces with respect to friction coefficients.