Search Results

In the automotive industry, thermal management plays a very important role to solve the problems of energy saving and emission. The under hood thermal management is one of the critical aspects in vehicle thermal management since it caters to critical aspects of engine cooling, charge air cooling, air conditioning and turbocharger cooling. The appropriate thermal management of these critical components is necessary for ensuring the appropriate performance by the vehicle. Hence, under-hood thermal management is the core of the integrated vehicle thermal management. In the thermal management analysis approaches, the numerical simulation is widely adopted as an important approach. Hence, in this paper a model is developed in MATLAB to handle 1D parametric analysis of the cooling system, while reducing the testing time and resources taken for the product development. The developed model can be used to evaluate multiple aggregate options for CAC, Radiator, Engine, Fan etc.

High currents flowing through various traces of a printed circuit boards (PCB) causes thermal run away and PCB warpage due to the occurrence of high heat density. The present study discusses on steady state thermal analysis performed in a PCB kept inside an enclosure. Thermal analysis allows PCB designer to quickly move and confirm the component’s placement by examining the temperature plots predicted on the PCB surface. A PCB particularly designed for automated manual transmission (AMT) application employed in Ashok Leyland electric vehicle (EV) trucks is used for this present study. The performed simulations are preliminary level and carried out with commercially available software Altair Simlab ElectroFlo 2022.3. Simlab is a PCB level EDA (Electronic Design Automation) software suite used for design and analysis, and thus helps in minimizing the development cycles.

The transmission adapts the output of the internal combustion engine to the drive wheels. For maximizing fuel economy and minimizing emissions, it is recommended to perform the integrated control of engine, motor and transmission by using an automated transmission. Further, in crowded cities, driving with a manual transmission creates stress to the driver due to constant gear shifts and clutch control. Today, several automated transmissions are developed such as an Automatic Transmission (AT), a Continuously Variable Transmission (CVT). But these transmissions are expensive. In manual transmission, due to variations in driving skills, gear utilization is not always optimal. Automation of manual transmission can help us maintain efficiency and reduce driver fatigue in city driving conditions. This paper presents design and developmental steps involved in the automation of shift-select mechanism of a manual transmission and also supplement as a proof of concept.

With growing fuel prices and global warming, fuel economy improvement and reduced emissions are becoming order of the day. Automobile manufacturers around the world are in increasing pressure to achieve the same, also keeping in account the stiff timelines required in the product developmental cycle. Condensed duty cycle that is representative of several days of actual real life running is developed for quicker fuel economy tuning on a chassis dynamometer. This paper presents a new methodology to obtain a synthetic drive duty cycle, which matches engine operating conditions of the actual real life cycle accurately and thereby providing a more accurate match in fuel economy. Drive duty cycle (vehicle velocity profile) used in this study is extracted from the instrumented vehicle in the real traffic condition (peak/lean hour) of major cities in India at different location/load conditions. Each recorded trip is further divided into micro trips.