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ENGINE AND EMISSIONS
ADAPTATION STRATEGY FOR EXHAUST GAS RECIRCULATION AND COMMON RAIL PRESSURE TO IMPROVE TRANSIENT TORQUE RESPONSE IN DIESEL ENGINES
Fuel injection limitation algorithms are widely used to reduce particulate matter (PM) emissions under transient states in diesel engines. However, the limited injection quantity leads to a decrease in the engine torque response under transient states. To overcome this issue, th...
ENGINE AND EMISSIONS
SIMULATION STUDY ON THERMAL MANAGEMENT STRATEGY TO ACHIEVE 99 % SCR EFFICIENCY OF A HEAVY-DUTY DIESEL ENGINE OVER A TRANSIENT CYCLE
In this study, NOx conversion characteristics of a urea selective catalytic reduction (SCR) system equipped on a heavy-duty diesel engine were evaluated through engine dynamometer bench tests over a scheduled world harmonized transient cycle (WHTC). Also, based on transient SCR ...
ENGINE AND EMISSIONS
EFFECT OF CHARGE DENSITY ON SPRAY CHARACTERISTICS, COMBUSTION PROCESS, AND EMISSIONS OF HEAVY-DUTY DIESEL ENGINES
In-cylinder charge density at top dead center is an important parameter of diesel engines and is influenced by intake pressure, intake temperature, and compression ratio. The effects of charge density on fuel spray, combustion process, and emissions were investigated by using a ...
ENGINE AND EMISSIONS
COMPARISON OF THE SPRAY AND THE SPRAY/WALL INTERACTION OF TWO GASOLINE INJECTORS
One important parameter influencing mixture formation and spray/wall interaction within engines is the geometry of the nozzle. In contrast to Diesel nozzles, the influence of the orifice geometry on spray formation has hardly be investigated for gasoline nozzles. In order to dem...
ENGINE AND EMISSIONS
EFFECT OF HEAVY-DUTY DIESEL ENGINE OPERATING PARAMETERS ON PARTICLE NUMBER AND SIZE DISTRIBUTION AT LOW SPEED CONDITION
Experiments and simulations were used to investigate the effect of a range of engine operating parameters and fuel characteristics on the particle size and particle number (PN) concentration at low speed and idle speed condition. The occurrence, size, and concentration of partic...
ENGINE AND EMISSIONS
GAUSSIAN PROCESS REGRESSION FEEDFORWARD CONTROLLER FOR DIESEL ENGINE AIRPATH
Gaussian Process Regression (GPR) provides emerging modeling opportunities for diesel engine control. Recent serial production hardwares increase online calculation capabilities of the engine control units. This paper presents a GPR modeling for feedforward part of the diesel en...
ENGINE AND EMISSIONS
POTENTIAL OF REAL-TIME CYLINDER PRESSURE ANALYSIS BY USING FIELD PROGRAMMABLE GATE ARRAYS
In this paper, a Field Programmable Gate Array (FPGA) was used to implement a real-time cylinder pressure analysis. The goal of the project was to improve the accuracy of calculated heat release and center of combustion calculations to enhance the precision of engine control fun...
VEHICLE DYNAMICS AND CONTROL
REAL-TIME LONGITUDINAL LOCATION ESTIMATION OF VEHICLE CENTER OF GRAVITY
The longitudinal location of a vehicle’s center of gravity (CG) is used as an important parameter for vehicle safety control systems, and can change considerably according to various driving conditions. Accordingly, for the better performance of vehicle safety control systems, ...
VEHICLE DYNAMICS AND CONTROL
PATH TRACKING FOR AUTONOMOUS RACE CAR BASED ON G-G DIAGRAM
Currently, the autonomous driving technique is attracting increasing research focus from all over the world. Generally, the control systems of an autonomous vehicle include environment perception, path planning and path tracking control systems. In this paper, the path tracking ...
VEHICLE DYNAMICS AND CONTROL
TIRE LATERAL FORCE ESTIMATION USING KALMAN FILTER
As for the tire analysis, lateral tire force is a fundamental factor that describes the stability of vehicle handling. Attempts to analyze the vehicle stability have been made based on various objective test methods and some specific factors such as yaw, lateral acceleration and...
VEHICLE DYNAMICS AND CONTROL
COMPARISON OF DYNAMIC MODELS OF MR DAMPER FOR HARDWARE IN THE LOOP SIMULATION OF LARGE-SIZED BUSES
The present study has focused on the comparison of MR damper dynamic models for the purpose of hardware in the loop simulation. A vehicle dynamic model for large-sized bus and a control logic for MR damper was built. Two typical MR damper models, viz. Bouc-Wen and hyperbolic tan...
VEHICLE DYNAMICS AND CONTROL
MODEL-BASED INTEGRATED CONTROL OF ENGINE AND CVT TO MINIMIZE FUEL USE
In this study, a model-based integrated control method for engines and continuous variable transmissions (CVTs) is developed. CVT refers to a type of transmission which allows an engine to be operated independently with respect to the vehicle speed, with the engine torque and CV...
FUELS AND LUBRICANTS
PARTICULATE MATTER AND PARTICLE-BOUND PAHS EMISSIONS FROM GASOLINE DIRECT INJECTION (GDI) ENGINE WITH METHANOL-GASOLINE BLENDED FUEL DURING START
The effects of coolant’s temperature on emissions of particulate matters (PM) and particle-bound polycyclic aromatic hydrocarbons (PAHs) from a gasoline direct injection (GDI) engine were studied during the start process using gasoline (M0) and gasoline mixed with methanol in 1...
ELECTRIC, FUEL CELL, AND HYBRID VEHICLE
DESIGN OF REGENERATIVE ANTI-LOCK BRAKING SYSTEM CONTROLLER FOR 4 IN-WHEEL-MOTOR DRIVE ELECTRIC VEHICLE WITH ROAD SURFACE ESTIMATION
This paper presents a regenerative anti-lock braking system control method with road detection capability. The aim of the proposed methodology is to improve electric vehicle safety and energy economy during braking maneuvers. Vehicle body longitudinal deceleration is used to est...
ELECTRIC, FUEL CELL, AND HYBRID VEHICLE
COMPONENT SIZING OF PARALLEL HYBRID ELECTRIC VEHICLE USING OPTIMAL SEARCH ALGORITHM
In designing a parallel hybrid electric vehicle, it is essential to select the optimal capacity of power sources and the optimal gear ratio of the torque coupler. The capacity of the power sources and the gear ratio of the torque coupler should be optimized simultaneously. Howev...
CONNECTED AUTOMATED VEHICLES AND ITS
TEST SCENARIO DESIGN FOR INTELLIGENT DRIVING SYSTEM ENSURING COVERAGE AND EFFECTIVENESS
Intelligent vehicle greatly benefits traffic safety, efficiency and driving comfortable. With the development of intelligent driving technology and its application, it is becoming increasingly important to do effective and comprehensive tests before putting on the market. Compre...
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