Drag Reduction by Application of Different Shape Designs in a Sport Utility Vehicle

Road vehicles drag is a direct consequence of a large wake area generated behind. This area is created owing to the vehicle shape, which is determined by the class, functional and aesthetic of the vehicle. Aerodynamic characteristics are a ramification and not the reason for the vehicle architecture. To enhance pressure recovery in the wake region, hence reduce drag, three different passive flow control techniques were applied to sport-utility-vehicle (SUV). A three-dimensional SUV was designed in CATIA, and a numerical flow simulation was conducted using Ansys-Fluent to evaluate the aerodynamic effectiveness of the proposed flow control approaches. A closed rectangular flap as an add-on device modifies the wake vortex system topology, enhances vortex merging, and increases base pressure which leads to a drag reduction of 15.87%. The perforated roof surface layer was used to delay flow separation. The measured base pressure values indicate a higher-pressure recovery, which globally reflected in a drag reduction of 19.82%. Finally, air guided through side rams was used as steady blowing. A steady passive air jet introduced at the core of the longitudinal trailing vortices leads to a confined wake area. The net effects appear in a global increase in the base pressure values and the pronounced drag reduction of 22.67%.

Sport-utility vehicle prediction based on machine learning approach

Data mining and machine learning analytics in manufacturing field is one of the major research fields in Information Technology with a lot of challenges. The goal of this research is to design a categorical solution to decide whether a customer is eligible and interested to purchase a sport-utility vehicle (SUV) based on the available data from the previous records collected from the banks. The data from different customers across various ages who have purchased the sport-utility vehicle earlier are collected and used in building a solution for this logistic model. A range of age and an estimated salary across different ages are the dependent factors in building this model. In addition, this model will predict the binary logistic outcome to show whether a customer can purchase a sport-utility vehicle or not. By enhanced cloud platform with larger volume of data keeping the algorithm remains the same using machine learning deployment for predicting the customer mindset in purchasing a sport-utility vehicle.

PEMILIHAN TORQUE CONVERTER UNTUK MENINGKATKAN PERFORMA KENDARAAN TRANSMISI OTOMATIS

Pengalaman berkendara atau di industri otomotif dikenal dengan istilah driving experience adalah merupakan satu aspek yang perlu diperhatikan untuk keberhasilan dalam meningkatkan jumlah penjualan kendaraan. Oleh sebab itu, tidak jarang perusahaan otomotif meluncurkan model dengan pengalaman berkendara yang berbeda untuk pengguna yang berbeda pula, sebagai contoh kendaraaan jenis SUV ( Sport Utility Vehicle), untuk pengendara yang ingin kendaraan yang bersifat responsif, lincah (agile) and presisi. Perusahaan Otomotif sangat menyadari hal ini, oleh sebab itu berusaha untuk meningkat inovasi dalam hal teknologi dengan melakukan uji coba terhadap peningkatan performa kendaraan diantaranya yaitu mesin, roda gigi, berat dan aerodinamis. Didalam penelitian ini akan di fokuskan pada penelitian dengan 3(tiga) jenis torque converter yang diuji coba di lapangan menggunakan kendaraan jenis prototipe akan dibandingkan dengan data yang didapatkan dari simulasi. Pada ahir penelitian akan didapatkan sebuah torque converter yang memiliki Full Load Acceleration yang sesuai untuk kendaraan transmisi otomatis dengan sport driving experience.

Gazing Characteristics of a Driver during Vehicle Backing

We investigated a driver’s gazing time during backing vehicle maneuvers in a 90-degree reverse parking system for the phase from start to the 5-m point (start phase) and the phase from backing from the 5-m point to stop (stop phase). The objective of this study was to elucidate the driver’s gaze while approaching the parking area and in the parking area during backing. We used a sport utility vehicle with the driver’s seat at the right-hand side. We modified the vehicle with four technological conditions: no-tech vehicle, sonar vehicle, backup-camera vehicle, and backup camera with sonar vehicle. The monitor, rearview mirror, left-side mirror, and right-side mirror were designated as the area of interest (AOI) in the gaze. For the start phase, there were no significant differences in the total gazing time of all the AOIs in the four technologies. For the stop phase, however, the total gazing time of all the AOIs for the vehicle with a backup camera was significantly longer than that of the vehicle without a backup camera owing to the increase in the gazing time of the monitor. The results obtained from these experiments will form a basis for the future development of vehicle camera systems.

Engineering design of a manipulator for mounting an air suspension compressor to a car chassis

This article is aimed at the engineering design of a manipulator, which is pneumatically controlled. It will serve for mounting the compressor of an air suspension system to the chassis of a sport utility vehicle (SUV) produced in the Slovak Republic. The manipulator will be used on an assembly line, on which SUVs are assembled. The designed device belongs to a group of dedicated devices, which are not produced within a serial production, however, it is the only functional prototype. Together with the manipulator structure, a pneumatic part of the assembly line including individual components, schemes and the pneumatic system will be proposed. Within the project process, all necessary customer demands, technical and safety standards have to be met. Moreover, ergonomic requirements for handling the device and other acts on the workplace have to be considered.

Experimental investigation on wake flow structures of Motor Industry Research Association square-back model

Since the oil crisis of the last century, drag reduction for vehicles has become the focus of researchers. Currently the world’s major car brands have to seize the sport utility vehicle market. However, the sport utility vehicle models usually have a larger frontal area which brings challenges to drag reduction. This requires a better understanding of flow around sport utility vehicle models. The Motor Industry Research Association square-back vehicle model is similar to the sport utility vehicle geometry and can reflect the typical characteristics of aerodynamics of sport utility vehicle models. In this article, the wake flow structures of a 1/8 Motor Industry Research Association model is measured by particle image velocimetry. The results indicate that there is an obviously “n” type backflow vortex behind the vehicle. In the vertical direction, the vortex rotates from the outside to the inside, meanwhile the vortex rotates from the inside to the outside in the longitudinal direction. There is a velocity deficit region between the vortex and the back of the model which is an important source of drag force. This article summarizes the results of particle image velocimetry measurements from the model tests and obtains a picture of the structures of the wake vortex finally which can provide a theoretical basis for the drag reduction research in the future.