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ARTICLE
ASYMMETRIC HARDENING BEHAVIOR OF AZ31B MAGNESIUM ALLOY SHEET WITH LARGE STRAIN AT VARIOUS STRAIN RATES
This paper investigates asymmetric hardening behavior of the magnesium alloy sheet of AZ31B at different strain rates when deformation is large. Tensile tests are carried out at the quasi-static state of 0.001 s–1 and the intermediate strain rate of 100 s–1 utilizing the In...
ARTICLE
VEHICLES FRONTAL IMPACT ANALYSIS USING COMPUTER SIMULATION AND CRASH TEST
Reconstruction of car accidents is a complex task, with many unknown variables. Among the parameters used to assess the accident severity, in case of a frontal collision between two vehicles, are the change in velocity (delta-v) and the Energy Equivalent Speed (EES). The EES i...
ARTICLE
OPTIMAL SUPERVISORY CONTROL STRATEGY FOR A TRANSMISSION-MOUNTED ELECTRIC DRIVE HYBRID ELECTRIC VEHICLE
This paper proposes a novel supervisory control for a parallel hybrid electric vehicles (HEVs) with a transmission-mounted electric drive (TMED). The proposed control includes an optimal power distribution algorithm that uses a modified equivalent consumption minimization stra...
ARTICLE
LPV/H∞ CONTROLLER DESIGN FOR PATH TRACKING OF AUTONOMOUS GROUND VEHICLES THROUGH FOUR-WHEEL STEERING AND DIRECT YAW-MOMENT CONTROL
This paper focuses on the path-tracking controller design for autonomous ground vehicles (AGVs) using fourwheel steering (4WS) and direct yaw-moment control (DYC) systems. In order to deal with the parametric uncertainties, a linear parameter-varying (LPV) H∞ controller is de...
ARTICLE
SAFE TECHNOLOGY WITH A NOVEL REAR COLLISION AVOIDANCE SYSTEM OF VEHICLES
This study aims to reduce the severity of injuries caused by and the frequency of rear-end vehicle collisions. A better collision prediction method is proposed by means of millimeter-wave radar sensors able to rapidly detect potential collisions and alert drivers. Implementati...
ARTICLE
INFLUENCE OF BIODIESEL BLENDED IN GASOLINE-BASED FUELS ON MACROSCOPIC SPRAY STRUCTURE FROM A DIESEL INJECTOR
This research investigates the spray characteristics of gasoline-biodiesel blended fuels (GB), which expected to be utilized in a gasoline compression ignition engine. Commercial gasoline blended with 0 ~20 % by volume of biodiesel, called GB00 - GB20, were used to experimen...
ARTICLE
EGO-VEHICLE SPEED PREDICTION USING A LONG SHORT-TERM MEMORY BASED RECURRENT NEURAL NETWORK
For predictive powertrain control, accurate prediction of vehicle speed is required. As vehicle speed prediction is affected by the driver’s response to numerous driving conditions under uncertainty, the development of an accurate model is quite challenging. This paper propos...
ARTICLE
AERODYNAMIC CHARACTERISTICS OF MIRA FASTBACK MODEL IN EXPERIMENT AND CFD
The lasting high fuel cost has recently inspired the resurgence in drag reduction research for vehicles, which calls for a thorough understanding of the vehicle wake. The acknowledged MIRA fastback vehicle model is characterized by similar real vehicle geometry, thus it is esp...
ARTICLE
MULTI-SPEED TRANSMISSION MECHANISM USING A COMPOUND PLANETARY GEAR SET AND BRAKES
Today, the use of electric vehicles (EVs) is increasing. Electric motors, which are used as the power source in EVs, have better torque-speed characteristics than traditional engines. However, electric motors also have a low speed torque limitation; moreover, their energy effi...
ARTICLE
NOVEL STEEL AND ARAMID/PHENOL COMPOSITE GEAR FOR A TRANSMISSION WITH OPTIMUM DESIGN AND FEM VIBRATION ANALYSIS
Hybrid gears made of steel and fiber-reinforced polymeric composite material are recently attracting electric vehicle designers’ attention due to their possible advantages such as lightweight and lessened transfer of noise and vibration for automotive transmissions. Polymeric...
ARTICLE
CUMULATIVE LIGHT INTENSITY OF AUTOMOTIVE GLASS: A COMPARATIVE STUDY ON COMBINATION OF OPTICAL FILTER FOR ACCELERATED WEATHERING TEST
The aim of this study was to establish a test method with improved reliability and reproducibility for the accelerated weathering test of automotive interior materials. For this purpose, this study measured the spectral power distribution (SPD) of the glass used in actual vehi...
ARTICLE
EFFECTS OF WHEEL CONFIGURATION ON THE FLOW FIELD AND THE DRAG COEFFICIENT OF A PASSENGER VEHICLE
The effects of wheel rotation, rim coverage area, fan spokes, spoke sharpness, and tread pattern on the flow field and drag coefficient of a passenger vehicle were investigated. Force measurements and wake surveys were taken on a 1/ 5th scale passenger vehicle at a Reynolds nu...
ARTICLE
DIESEL ENGINE MODEL WITH MULTI-MODEL CORRECTION OF INTAKE MANIFOLD PRESSURE
A simulation model of a diesel engine is widely applied to evaluate the engine controller before a vehicle test because controller error can be observed by the engine model. For diesel engine modeling, an adiabatic model is commonly used to express intake manifold pressure bec...
ARTICLE
SIMULATING TIRE INFLATION PRESSURE LOSS RATE TEST BY THE IDEAL MATERIAL METHOD
Tire Inflation Pressure Loss Rate (IPLR) test is a widely accepted test method to evaluate the tire pressure retention performance, which helps increase fuel economy and prevent premature tire failures. At present, an IPLR test usually lasts for several months, which greatly r...
ARTICLE
PROPER RADIAL SPOKES OF NON-PNEUMATIC TIRE FOR VERTICAL LOAD SUPPORTING BY FINITE ELEMENT ANALYSIS
This research aimed to develop the 3D finite element model of non-pneumatic tire (NPT) for designing the proper radial spoke. The NPT was cut using waterjet cutting technique to prepare the appropriate test specimens. The hyperelastic constitutive models were used to model the...
ARTICLE
THERMO-MECHANICAL COUPLED ANALYSIS OF HOT PRESS FORMING WITH 22MnB5 STEEL
This paper mainly concerns the thermo-mechanical analysis to evaluate the process parameters in the hot press forming with the 22MnB5 sheet such as the austenitization temperature, transport and quenching time for enhancing the efficiency in the production cycle. It is noted t...
ARTICLE
ANALYSIS OF STEERING RETURNABILITY AND COMPENSATION LOGIC DEVELOPMET IN LIMIT CORNERING CONDITION
This paper describes steering returnability by analyzing forces applied to kingpin axis in limit cornering conditions. The steering returnability is related to forces applied to kingpin axis. These forces are classified by its source: Tire force and steering force. Tire force ...
ARTICLE
THEORETICAL AND EXPERIMENTAL STUDY ON FLOW CHARACTERISTICS OF A DIAPHRAGM PUMP FOR UREA-SCR SYSTEMS
Urea selective catalytic reduction (SCR) is the primary technology used to reduce the nitrogen oxides (NOx) of diesel engine exhaust. To meet the requirements of an SCR system, a novel type of miniature diaphragm pump was designed. Based on the theory of large deflection of an...
ARTICLE
DEVELOPMENT OF A SINGLE-SUCTION DOUBLE-DISCHARGE AUTOMATIC TRANSMISSION OIL PUMP FOR POWER-CONSUMPTION REDUCTION
The high power consumption of the automatic transmission oil pump has led to the undertaking of efficiency improvement studies over a number of decades. For the unique idea of the present paper, a single automatic transmission oil pump was adopted to satisfy the requirements o...
ARTICLE
EFFECT OF COMBUSTION REACTION BASED ON CAPACITIVE DISCHARGE IGNITION IN AIR-PROPANE EQUIVALENCE RATIO
The main purpose of this research work is to demonstrate the effective plasma of capacitive discharge ignition (CDI) comparing with conventional ignition discharge. A constant volume combustion chamber (CVCC) with a volume of 450 cm3 is developed to study thermochemical combusti...
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