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VEHICLE DYNAMICS AND CONTROL
DEVELOPMENT OF PREVIEW ACTIVE SUSPENSION CONTROL SYSTEM AND PERFORMANCE LIMIT ANALYSIS BY TRAJECTORY OPTIMIZATION
The main role of the suspension system is to achieve ride comfort by reducing vibrations generated by the road roughness. The active damper is getting much attention due to its reduced cost and ability to enhance ride comfort especially when the road ahead is measurable by an ...
BODY AND SAFETY
REDUCTION IN THE HEAD INJURY LEVEL DUE TO JUNIOR HIGH SCHOOL CYCLISTS WEARING HELMETS
We assessed the effect of wearing a junior-high-school helmet when the frontal or lateral part of a helmet impacted the upper part and lower part of the A-pillar of a vehicle at 35 km/h (212 J). The head injury criterions (HICs) of the headform impactor without a helmet were r...
BODY AND SAFETY
VARIABLE CROSS-SECTION RECTANGULAR BEAM AND SENSITIVITY ANALYSIS FOR LIGHTWEIGHT DESIGN OF BUS FRAME
Timoshenko beam element of variable cross-section rectangular tube is developed and applied in the lightweight design of bus frame in this paper. Firstly, the finite element formulations of variable cross-section beam (VCB) are derived under the loadsteps of axial deformation,...
BODY AND SAFETY
DESIGN FOR HEADREST INCLUDING GUIDES SLOT TO REDUCE THE NECK FORCE IN REAR END IMPACT
Whiplash injuries are one of the most common injuries reported in automotive rear end collisions. Automobile seat back and head restraints play a role in reducing neck injuries during low speed rear end collisions. Currently, many studies are being conducted on ways to reduce ...
FUELS AND LUBRICANTS
EVALUATION AND MEASUREMENT THE RECOVERED ENERGY FROM AUTOMOBILE SUSPENSION IN THE OPERATION CONDITIONS
The purpose of this paper is to verify if it is possible to recover the energy from automobile suspensions, using a system who replace the shock absorber. The system consists of an electric generator, a mechanical system for transforming the translation of body car in rotation...
MATERIALS AND RECYCLING
CREEP LIFE PREDICTION OF ALLOY 718 FOR AUTOMOTIVE ENGINE MATERIALS
This study was carried out to investigate the creep life at the high temperature of the Alloy 718 for automotive engine components using the initial strain parameter method (ISPM). Creep tests have performed at elevated temperatures in the range of 550 oC to 700 oC in this wor...
ELECTRIC, FUEL CELL, AND HYBRID VEHICLE
NEW OPTIMAL POWER MANAGEMENT STRATEGY FOR SERIES PLUG-IN HYBRID ELECTRIC VEHICLES
Recently Plug-in hybrid electric vehicles (PHEVs) have gained increasing attention due to their ability to reduce the fuel consumption and emissions. In this paper a new efficient power management strategy is proposed for a series PHEV. According to the battery state of charge...
ELECTRIC, FUEL CELL, AND HYBRID VEHICLE
DISTURBANCE OBSERVER-BASED SIDESLIP ANGLE CONTROL FOR IMPROVING CORNERING CHARACTERISTICS OF IN-WHEEL MOTOR ELECTRIC VEHICLES
In this paper, a robust sideslip angle controller based on the direct yaw moment control (DYC) is proposed for in-wheel motor electric vehicles. Many studies have demonstrated that the DYC is one of the effective methods to improve vehicle maneuverability and stability. Previo...
ELECTRIC, FUEL CELL, AND HYBRID VEHICLE
OPTIMIZATION OF GEAR RATIO OF IN-WHEEL MOTOR VEHICLE CONSIDERING PROBABILISTIC DRIVER MODEL
A reduction gear of an in-wheel motor vehicle is mounted between a traction motor and wheel, to increase the wheel torque and decrease the rotational speed. To improve the energy efficiency of a vehicle, the determination of the optimal gear ratio is an important factor in the...
CONNECTED AUTOMATED VEHICLES AND ITS
ELECTRICALLY ASSISTED INTERNAL COMBUSTION ENGINES: A COMPARATIVE ANALYSIS
An electrically assisted internal combustion engine is obtained by combining a conventional engine and one or more electrical motors of considerably smaller size. A key feature of such an innovative vehicle hybridization approach is that the torque generated by electric machin...
HEAT TRANSFER, FLUID AND THERMAL ENGINEERING
COOLING EFFICIENCY ACCORDING TO SHAPE CHANGES TO THE STRAIGHT VENTILATION HOLE IN CARBON-CERAMIC BRAKE DISKS
In this study, in order to examine the cooling efficiency of a carbon-ceramic brake disk, the temperature distribution of the disk, depending on the AMS (Auto-Motor-Sport) Fade mode, was analyzed using a numerical method. Two brake disks with different straight ventilation hol...
ENGINE AND EMISSIONS
EFFECT OF HYDROTHERMAL AGING OVER A COMMERCIAL DOC ON NO2 PRODUCTION AND SUBSEQUENT SCR EFFICIENCY
In this study, the effect of hydrothermal aging over a commercial diesel oxidation catalyst (DOC) on deterioration in nitrogen dioxide (NO2) production activity has been experimentally investigated based on a micro-reactor DOC experiment. Through this experimental result, the ...
HEAT TRANSFER, FLUID AND THERMAL ENGINEERING
AERODYNAMIC DESIGN OF A SOLAR ROAD VEHICLE
Solar road vehicles have very specific design requirements. This makes their aerodynamic characteristics quite different from classic sedan vehicles. In the present study, the computational model of a typical solar road vehicle was developed to investigate its aerodynamic forc...
CHASSIS
DC MOTOR CURRENT CONTROL ALGORITHM USING PROPORTIONAL-INTEGRAL LQT WITH DISTURBANCE OBSERVER
This paper proposes a DC motor current control algorithm using a proportional-integral linear quadratic tracking (LQT) controller with a disturbance observer for the electronic stability control (ESC) brake system. Previously researched algorithms related to current control us...
CHASSIS
FUNCTION INTEGRATION FOR LIGHTWEIGHT CHASSIS BASED ON AXIOMATIC DESIGN AND DESIGN STRUCTURE MATRIX
Function integration is the way used commonly to achieve the lightweight design system. To realize the design successfully by combing two systems multifaceted issues in need to be considered. The potential functional conflicts between the existing systems are the major unfavor...
VEHICLE DYNAMICS AND CONTROL
ACOUSTICAL CHARACTERISTICS OF THE AIR FILTER IN THE ENGINE INTAKE AIR CLEANER
Linear acoustic theory is used for estimating the acoustical performance of the air cleaner box composed of the porous filter and encasing box in the engine intake system. The pleated filter structure is modeled as coupled multiple ducts having permeable micro-perforated walls...
VEHICLE DYNAMICS AND CONTROL
ESTIMATION OF ROAD BANK ANGLE AND VEHICLE SIDE SLIP ANGLE USING BAYESIAN TRACKING AND KALMAN FILTER APPROACH
A lateral acceleration is considered to be a significant sensor signal for an estimation of a side slip angle. Due to the fact that a characteristic of a lateral G sensor, the sensor has a technical issue when a road bank angle has presented. In order to resolve the issue, thi...
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