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Transactions of the Korean Society of Automotive Engineers
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Journal DOI :
The Korean Society of Automotive Engineers
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Volume & Issues
Volume 17, Issue 6 - Nov 2009
Volume 17, Issue 5 - Sep 2009
Volume 17, Issue 4 - Jul 2009
Volume 17, Issue 3 - May 2009
Volume 17, Issue 2 - Mar 2009
Volume 17, Issue 1 - Jan 2009
Selecting the target year
Path Tracking Motion Control using Fuzzy Inference for a Parking-Assist System
Kim, Seung-Ki ; Chang, Hyo-Whan ; Kim, Chang-Hwan ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 1~9
A parking-assist system is defined that a driver adjusts vehicle velocity through brake pedal operation and parking-assist system controls the motion of the vehicle to follow a collision-free path. In this study, a motion control algorithm using Fuzzy inference is proposed to track a maneuvering clothoid parallel path. Simulations are performed under SIMULINK environments using MATLAB and CarSim for a vehicle model. As the vehicle model in MATLAB a bicycle model is used including lateral dynamics. The simulation results show that the path tracking performance is satisfactory under various driving and initial conditions.
The Effect of Flow Distribution on Transient Thermal Behaviour of CDPF during Regeneration
Jeong, Soo-Jin ; Lee, Jeom-Joo ; Choi, Chang-Ho ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 10~19
The working of diesel particulate filters(DPF) needs to periodically burn soot that has been accumulated during loading of the DPF. The prediction of the relation between an uniformity of gas velocity and soot regeneration efficiency with simulations helps to make design decisions and to shorten the development process. This work presents a comprehensive combined 'DOC+CDPF' model approach. All relevant behaviors of flow fluid are studied in a 3D model. The obtained flow fields in the front of DPF is used for 1D simulation for the prediction of the thermal behavior and regeneration efficiency of CDPF. Validation of the present simulation are performed for the axial and radial direction temperature profile and shows goods agreement with experimental data. The coupled simulation of 3D and 1D shows their impact on the overall regeneration efficiency. It is found that the flow non-uniformity may cause severe radial temperature gradient, resulting in degrading regeneration efficiency.
Effect of Alternator Control on Vehicle Fuel Economy
Cho, Guen-Jin ; Wi, Hyo-Seong ; Lee, Jong-Hwa ; Park, Jin-Il ; Park, Kyoung-Seok ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 20~25
For many years there has been a trend to increased electrical energy consumption in cars caused by the replacement of mechanical parts by electronic or mechanical devices as well as the introduction of new electronic features. Whereas the number of electrical consumers continues to increase, the battery is still the only passive power source available. Because of this reason, needs for driving power of the engine accessories such as alternator system have increased. Usually, conventional alternator system is directly driven by the crankshaft of engine with belt. Since this increase bring about additional fuel economy. To improve this system automobile makers develops new controled alternator system. This paper focuses on fuel economy improvement according to control of alternator. In this paper, researches are performed on effect of type of Alternator system on fuel economy by experiment. And it is also calculated the effect on vehicle fuel economy using computer simulation with AVL cruise software. As a result, 0.64% of vehicle fuel economy improvement can be achieved in a vehicle with controled Alternator system compared to a vehicle with conventional Alternator system in NEDC mode.
A Study on Workload of Using Telematics while Driving
Koo, Tae-Yun ; Kim, Bae-Young ; Ji, Sung-Ho ; Bae, Chul-Ho ; Park, Jung-Hoon ; Suh, Myung-Won ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 26~33
New equipment that is useful for driving is developing every day. Navigation is one of the most popular equipment among them. Telematics market including navigation is getting bigger and bigger. However, traffic accident from using telematics equipment is also increasing. Drivers may lose glance using navigation, and driver's workload will also grow by driver's distraction. This thesis is base on the study about the influence on the drivers' workload by using the telematics equipment. Previous study of drivers' workload used psychological method and behavior test method, but it was less connection with telematics equipment. The main object of this thesis is measuring the workload according to the telematics usage by HMI (Human Machine Interface) in the virtual reality. Therefore, we developed GPS simulator, and made an experiment of whether using the navigation or not on the highway and an experiment of the location of navigation in downtown. The result of these experiments is that workload when driver used navigation was higher than when driver didn't use navigation. In addition, workload was different according to the location, and HUD (Head-Up Display) was especially higher than other locations but also its information delivery ability was the best.
Development of the Blind Spot Detecting System for Vehicle
Yoon, Moon-Young ; Kim, Se-Hun ; Son, Min-Hyuk ; Yun, Duk-Sun ; Boo, Kwang-Seok ; Kim, Heung-Seob ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 34~41
The latest vehicle yields a superior safety and reduction of driving burden by monitoring the driving state of vehicle and its environment with various sensors. To detect other vehicles and objects of the rear left and right-side blind spot area of driver, provide the information about a existence of objects inside the blind spot, and give a signal to avoid collision, this study proposes the intelligent outside rear-view mirror system. This task has substantially complicated several factors. For example, the size, geometry and features of the various vehicles which might enter the monitored zone is varied widely and therefore present various reflective characteristics. This study proposes the optimal specification and configuration of optical system and IR array sensor of blind spot detection system, and shows the results of the performance evaluation of developed system.
Effect of Inlet Valve Angle on In-Cylinder Swirl. Generation Characteristics(II)
Ohm, In-Yong ; Park, Chan-Jun ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 42~48
This paper is the second of 2 companion papers which investigate in-cylinder swirl generation characteristics according to inlet valve angle. Two DOHC 4 valve engines, one has wide intake valve angle and the other has narrow valve angle, were used to compare the characteristics of swirl motion generation in the cylinder. One intake port was deactivated to induce swirl flow. A PIV (Particle Image Velocimetry) was applied to measure in-cylinder velocity field according to inlet valve angle during intake stroke. The results show that the flow patterns of narrow valve engine are much more stable and well arranged compared with the normal engine over the entire intake and compression stroke except early intake stage, and very strong swirl motion is generated at the end of compression stage in this engine nevertheless using straight port which is unfavorable for swirl generating. In the wide valve angle one, however, strong swirl motion induced during intake stroke is destroyed as the compression progresses.
A Study on the Side Collision Accident Reconstruction Using Database of Crush Test of Model Cars
Sohn, Jeong-Hyun ; Park, Seok-Cheon ; Kim, Kwang-Suk ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 49~56
In this study, a side collision accident reconstruction using database based on the deformed shape information from the collision test using model cars is suggested. A deformation index and angle index related to the deformed shape is developed to set the database for the collision accident reconstruction algorithm. Two small size RC cars are developed to carry out the side collision test. Several side collision tests according to the velocity and collision angles are performed for establishing the side collision database. A high speed camera with 1000fps is used to capture the motion of the car. A side collision accident reconstruction algorithm is developed and applied to find the collision conditions before the accident occurs. Two collision cases are tested to validate the database and the algorithm. The results obtained by the reconstruction algorithm show good match with original conditions with regard to the velocity and angle.
The Steering Characteristics of Military Tracked Vehicles with Considering Slippage of Roadwheel
Lim, Won-Sik ; Yoon, Jae-Seop ; Kang, Sang-Wook ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 57~66
In this paper, the steering characteristics of tracked vehicles are studied for the improvement of steering performance. The important design factor of military vehicles is high mobility. It is influenced by weight of a vehicle, engine capacity, power-train, and steering system. The military vehicle, which is equipped with caterpillar, has unique steering characteristics and is quite different from that of a wheeled vehicle. The steering of tracked vehicles is operated in the power pack due to different speeds of both sprockets. Under cornering conditions, power split and power regeneration are happened in the power pack. In case of power regeneration, power is transferred outside track after adding engine power and power inputted inside track from the ground. However, excessive power regeneration is transferred in the power pack. It damages mechanical elements. Therefore, it is necessary to analyze the steering system and check mentioned problem above. In this study, the detailed dynamic model of steering system is presented, which includes slippage between track and roadwheel, inertia force, and inertia moment. Finally, our model is compared with the Kitano model and we verified the validity of the model.
Optimization of Multi-component Injection Molding Process Based on Core-back System
Choi, Dong-Jo ; Park, Hong-Seok ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 67~74
Injection molding have been used for manufacturing various fields of automotive interior trims for years. The demands on the injection molding technique are grown with the further development of the automobile technique and the design presentations for cost reduction and environment-friendly. This paper shows that multi-component injection conditions are different from general injection, also shows how to optimize part design and mold design and how to manufacturing through the efficient use of multi-component injection in development process using core back system. To fulfill this purpose, all influential process parameters related to the quality of automobile parts were analyzed in terms of the correlation between them. Base on that, a innovative process will be developed by injection engineers to implement it in practice.
Characteristics of SMD and Volume Flux of Two-phase Jet Injected into Cross-flow with Various Gas-liquid Ratio and Reynolds Number
Kim, Jong-Hyun ; Lee, Bong-Soo ; Koo, Ja-Ye ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 75~81
A study was performed to investigate the characteristics of two-phase jet injected into subsonic cross-flow using the external mixed gas blast two-phase nozzle. The shadowgraph method was adopted for the cross-flow jet visualization and PDPA system was used to measure droplet size, velocity, and volume flux. The atomization of two-phase jet is initially determined according to gas to liquid mass flow-rate ratio and the Reynolds number of cross-flows. The highest penetration trajectories of two-phase jet injected into cross-flow are governed by the momentum ratio at subsonic cross-flow. As GLR of two-phase jet injected into cross-flow increases, the droplet size decreases and the distribution area of volume flux increases. The distribution of volume flux that influenced by the counter vortex pair at the downstream of cross-flow is symmetric in shape of horseshoe.
Spray Characteristics of Biodiesel Fuel by Blending Bioethanol and Diesel Fuel in a Common Rail Injection System
Park, Su-Han ; Suh, Hyun-Kyu ; Kim, Hyung-Jun ; Lee, Chang-Sik ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 82~89
In order to investigate the spray characteristics according to diesel and bioethanol blending with biodiesel fuel, macroscopic spray characteristics were analyzed from the comparison of the effect of the injection pressure, ambient pressure and density on the spray tip penetration and spray cone angle. In addition, spray atomization characteristics were studied with local and overall Sauter mean diameter (SMD) and the contour map of SMD distribution at various injection conditions. It was revealed that the spray tip penetration of biodiesel fuels blended with diesel and ethanol was shorter than that of an undiluted biodiesel fuel at low injection pressure. However, the difference of spray tip penetration among three test fuels reduces at a high injection pressure. Increase of the ambient gas density leads to the decrease of the spray tip penetration of three test fuels. When diesel and ethanol fuels add to an undiluted biodiesel fuel, spray cone angle increases due to the decrease of the fuel density at the same ambient pressure condition. On the other hand, the droplet mean diameter decreases due to the reduction of the kinematic viscosity and surface tension.
A Study on Injury Characteristics of Elderly in Car-to-Car Frontal Crashes
Hong, Seung-Jun ; Cho, Kyoung-Keun ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 90~97
One of the most important factors that affect a person's risk of injury in a motor vehicle crash is the age of the person. This study investigates the characteristics of crash injuries among young, middle-aged and older drivers and occupants. Based on the comprehensive claim data from automobile insurance from 2000 to 2007, this study examines in great detail the drivers and occupants injury body regions and severity by age in car-to-car frontal crashes. It has been shown that elderly drivers and occupants suffer more injuries at a chest region compared to the middle-aged group. This research calls attention to the need for design to make vehicles more protective for older drivers in car-to car frontal crashes.
Hydro-forming and Simulation of Cross Member Parts for Automotive Engine Cradle
Kim, Kee-Joo ; Lee, Yong-Heon ; Bae, Dae-Sung ; Sung, Chang-Won ; Baik, Young-Nam ; Sohn, Il-Seon ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 98~103
The environment and energy related problem has become one of the most important global issues in recent years. One of the most effective ways of improving the fuel efficiency of automobiles is the weight reduction. In order to obtain this goal the hydroforming technology has been adapting for the high strength steel and its application is being widened. In present study, the chassis components (mainly cross members of engine cradle) simulation and development by hydroforming technology to apply high strength steel having tensile strength of 440 MPa grade is studied. In the part design stage, it requires feasibility study and process design aided by CAE (Computer Aided Design) to confirm hydroformability in details. Overall possibility of hydroformable chassis parts could be examined by cross sectional analyses. Moreover, it is essential to ensure the formability of tube material on every forming step such as pre-bending, performing and hydroforming. In the die design stage, all the components of prototyping tool were designed and interference with press was investigated from the point of geometry and thinning.
Optimization of Frontal Crashworthiness for the Weight Reduction Design of an Auto-body Member with the Advanced High Strength Steels
Kim, Kee-Poong ; Kim, Se-Ho ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 104~111
In this paper, optimization for frontal crashworthiness is carried out for the weight reduction design of an auto-body member with the advanced high strength steels(AHSS) such as 780TRIP and 780DP. The frontal crashworthiness is evaluated in order to optimize thicknesses for the front rail member of the ULSAB-AVC, Thicknesses of the front rail member with AHSS are optimized by comparison of crushing distance, absorbed energy and the deceleration for the auto-body with the response surface methodology. The results demonstrate that the crashworhiness of the front rail member with the optimum thicknesses of the AHSS is similar to analysis results obtained from the ULSAB-AVC project. The results also show that the weight reduction design is performed by substituting the AHSS for conventional structural steels such as 440E in the auto-body members.
Durability Improvement of High Pressure Seal for ISU under the Track Vibration
Han, In-Sik ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 112~117
The new suspension, called ISU(In-arm suspension system) was developed for Infantry Fighting Vehicle. During vehicle field test, early failure of ISU's sealing system was occurred after driving the paved road. From the failure analysis, ISU's displacement data was obtained. In analysis of PSD data, track induced vibration which has high frequency and small amplitude characteristics, was dominant. Such track vibration would result in early seal failure because of friction increase and lack of lubrication. To simulate track vibration environment in laboratory, seals were tested under the condition of 20Hz,
amplitude. The same type of seal failure occurred in vehicle test, was reproduced in the lab test under
amplitude. From the test results, the durability of improved seal was increased by 2.5 times compared with the previous one.
Cylinder Pressure based Real-Time IMEP Estimation of Diesel Engines
Kim, Do-Hwa ; Oh, Byoung-Gul ; Ok, Seung-Suk ; Lee, Kang-Yoon ; SunWoo, Myoung-Ho ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 118~125
Calculation of indicated mean effective pressure(IMEP) requires high cylinder pressure sampling rate and heavy computational load. Because of that, it is difficult to implement in a conventional electronic control unit. In this paper, a cylinder pressure based real-time IMEP estimation method is proposed for controller implementation. Crank angle at 10-bar difference pressure(
) and cylinder pressure difference between
) are used for IMEP estimation. These pressure variables can represent effectively start of combustion(SOC) and fuel injection quantity respectively. The proposed IMEP estimation method is validated by transient engine operation using a common-rail direct injection diesel engine.
Comparative Evaluation of the Cooling and Heating Performance of a
Heat Pump System for Vehicles
Kim, Sung-Chul ; Kim, Min-Soo ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 126~131
heat pump system was designed for both cooling and heating in the cabin of electric vehicles, hybrid vehicles or fuel cell vehicles, In this study, the performance characteristics of the heat pump system without any supplementary heating device were analyzed and the heating performance was compared with the cooling performance for various operating conditions. Experiments were carried out by changing the speed of electric drive compressor, the air flow rate of interior heat exchanger and the air inlet temperature and speed of exterior heat exchanger. Therefore, the cooling/heating capacities and the corresponding COPs are quantified. Also, the heat pump system showed an improved performance for the cooling operation and the heating operation. In this study, the experimental results can be used to evaluate the effect of system design changes on system performance as well as the development of a highly efficient heat pump system.
A Study on the DME Application Performance of a High Pressure Fuel Pump for an Electric Controlled Common-rail Compression Ignition Engine
Chung, Jae-Woo ; Kim, Nam-Ho ; Kang, Jung-Ho ; Park, Sang-Wook ; Lee, Ho-Kil ; Choi, Seung-Kyu ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 132~140
Recently, the interest in the development of high efficiency Diesel engine technology using alternative fuel has been on the rise and related studies are being performed. Therefore, the DME(Dimethyl Ether), an oxygen containing fuel as an alternative fuel for light oil that can be used for diesel engines since it generates very little smoke. But it is unavoidable that the modification of a fuel supply system in an engine to application of the DME fuel because of DME fuel properties. So, in this study, a DME high pressure pump for a common-rail fuel supply system has been composed and the test results of the pump have been presented. As the results of the tests, it is confirmed that DME pump inlet pressure, pump speed and common-rail pressure effects on the volumetric efficiencies of the pump. Finally, it is defined that the optimum plunger volume of a DME pump has to be extended to the minimum 150% compared to a Diesel pump plunger volume considering DME fuel properties and volumetric efficiencies characteristics at same specifications of the high pressure pump.
Dynamic Stiffness and Frequency Response Analysis for the Development of Magnesium Oil Pans
Shin, Hyun-Woo ; Chung, Yeon-Jun ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 141~149
The oil pan is an important factor for the noise behavior of the engine system. In this paper a new Magnesium oil pan was designed and analyzed to replace the current Aluminium oil pan. Dynamic stiffness and sound pressure level of the newly designed Mg oil pan were compared with the AI oil pan using the finite element method. NVH characteristics of the Mg oil pan is slightly insufficient when we changed the material of the oil pan from Al to Mg without modifying the design. Some design modifications of the Mg oil pan resulted in equal or superior characteristics compared to the Al oil pan. New ribs were added to stiffen the structure of the Mg oil pan. Thickness of thin plate area was increased to reduce the radiated noise. Through the changes of shape, higher dynamic stiffness than the current Al oil pan were achieved. Results of frequency response analysis show that we can reduce the sound pressure level of the oil pan if we increase the thickness of the thin plate area. It is shown that the new Mg oil pan could reduce the weight of the engine system and improve NVH quality of an automobile.
Reducing Vibration of a Centrifugal Turbo Blower for FCEV Using Vibrational Power Flow
Kim, Yoon-Seok ; Lee, Sang-Kwon ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 150~158
A centrifugal turbo blower is one of the part to generate electric power of fuel cell electric vehicle(FCEV). In order to generate the electric power of FCEV, the centrifugal turbo blower operates at very high speed above 30,000rpm in order to increase the pressure of the air, which supplied to a stack of FCEV, using rotation of its impeller blades. Vibration which originated from the blower is generated by unbalance of mechanical components, rotation of bearings and rotating asymmetry that rotate at high speed. The vibration is transmitted to receiving structure through vibration isolators and it can causes serious problems in the noise, vibration and harshness(NVH) performance. Thus, the study about reducing this kind of vibration is an important task. Quantifying the effectiveness of vibration isolation can be effectively accomplished by using vibrational power flow because relative contributions of each isolator to the total vibration transmission can be easily represented. In this paper, vibrational power flow is applied to the centrifugal turbo blower mounted on FCEV in order to analyze the most dominant vibration transmitting path. As a result, the main contributor among four isolators is a mount #3 of the blower. Also, a 30 percent lowering of the mount #3 stiffness shows 34 percent decrement of vibrational power flow by the simulation.
A Study on Heat Exchange Efficiency of EGR Cooler for Diesel Hybrid
Lee, Joon ; Moon, Jeon-Il ; Kim, Yeon-Hee ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 159~164
Cooled EGR system is an effective method for the reduction of
emission and PM emission from a diesel engine. Proper choice of wavy cooling fins and gas tubes is a key factor of cooled EGR system. As a part of solutions for energy crisis and environmental problems, hybrid vehicles mounted with diesel engines are under development globally. This study investigates the cooled EGR systems for hybrid diesel engine with the specifications of both optimized wavy cooling fins and improved shape of structure to verify the heat exchange efficiency, outlet temperature and gas pressure drop of cooler by means of numerical analyses and rig performance tests. The output of this study will be applied to a 2.0L hybrid diesel engine which is being developed for domestic and overseas market.
Experimental Study on the Hydraulic Power Steering System Noise
Lee, Byung-Rim ; Choi, Young-Min ; You, Chung-Jun ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 165~170
Pressure ripple, vibration and noise level are measured in each parts of the power steering system. MD(Mahalanobis Distance) is calculated by using MTS(Mahalanobis Taguchi System) with measured data, and noise sensitive components are selected. The components applied detail design parameters are made and data is measured. After that MD is calculated also. Mean value and SN ratio can be obtained from the MD. Effective noise reduction technique and dominant design parameters in hydraulic power steering system are introduced.
An Experimental Study on Application Characteristics of the Vortex Tube for Substitution of the Intercooler in a Common-rail Diesel Engine
Im, Seok-Yeon ; Lee, Ho-Kil ; Jung, Young-Chul ; Choi, Doo-Seuk ; Ryu, Jeong-In ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 171~179
An object of this study is to confirm application characteristics of the vortex tube apparatus for substitution of the intercooler in a common-rail diesel engine. The turbo pressure, the intake air mass flow rate and the charging air cooling ratio of the intercooler were measured in an experimental engine. The vortex tube apparatus was made after confirmation of the geometric phenomena in fundamental experiments. The vortex tube designed with fundamental data was applied to a conventional common-rail diesel engine instead of the intercooler. Its application characteristics, engine performances and emissions were investigated. From this experimental results, we suggested the vortex tube can be applied to a conventional common-rail diesel engine throughout extra complement. We can also expect the higher cooling effect, if we consider the application of the vortex tube in supercharging diesel engine without the intercooler.
Experimental Study on DeNOx Characteristics of Urea-SCR System
Ham, Yun-Young ; Lee, Seong-Ho ; Jung, Hong-Seok ; Shin, Dong-Hyun ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 180~186
To meet the NOx limit without a penalty of fuel consumption, urea SCR system is currently regarded as promising NOx reduction technology for diesel engines. SCR system has to achieve maximal NOx conversion in combination with minimal
slip. In this study, as a basic research to develop an algorithm for urea injection control, the characteristics of engine out NOx emission and behavior of NOx reduction during steady-state and transient conditions were investigated using 2L DI diesel engine. Test results show that on increasing the catalyst temperature the variations in the outlet NOx concentration are faster and maximal allowable
storage exponentially decreases. For change from a low to high engine load, it can be seen that a few seconds after load-step is required to reach full NOx conversion and the adsorbed amount of
at lower temperature desorb during the next temperature increase, causing
slip. Engine out NOx emission needs to be corrected because NOx emissions just after step load is lower than that of steay state condition.
Finite Element Analysis for Fastening Process of Snap Ring
Ryu, Il-Hun ; Lim, Young-Hun ;
Transactions of the Korean Society of Automotive Engineers, volume 17, issue 2, 2009, Pages 187~192
A snap ring is a kind of metal spring with open ends which can be installed into a groove to prevent lateral movement. In this study a nonlinear finite element analysis model is developed to simulate the fastening process of a snap ring connecting the constant velocity joint and the transmission. Insert load, disengage load and breakage are three important issues. They are analyzed using the developed model. The load histories of simulations are similar to those of tests and the differences of maximum load are around 10%. Bending of the entire ring and unfolding of the end section are major contributors of the fastening load. The load variations caused by the angular position of spline tooth are about 50%. Breakage is highly sensitive to the position of a snap ring.