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Technical Paper

Optimization of Performance and CO2 Emission of a Common Rail DI Diesel Operated Vehicle Using AVL Cruise

The global economy strives towards clean energy in the phase of climate change and the automotive industry is researching in improving the efficiency of automobiles. In respect to that, direct injection types of diesel engines are becoming popular. However, improving the performance and reducing the CO₂ emission of a vehicle is necessary in order to meet the fuel economy targets. A turbocharged common rail direct injection diesel engine is selected for investigation purpose to study its performance and average fuel consumption values over typical driving cycles (UDC, EUDC and BS IV). Experimental work is carried out to collect the vehicle performance and fuel economy test data. The simulation tools are used to speed up the product development process and to bring the new products into the market. The AVL Cruise simulation technique allows us to speed up the optimization of vehicle and powertrain parameters in an early stage of the product development process.
Technical Paper

Experimental Investigations on Performance and Emission Characteristics of Diesel Fuel Blended with 2-Ethoxy Ethyl Acetate and 2-Butoxy Ethanol

The demand for compression ignition engines is continuously growing due to their good fuel efficiency. But they cause lot of concern with regard to exhaust emissions. This concern sought to examine ways by which the composition of the fuel used by CI engines could be changed to reduce emissions. The addition of oxygen containing compounds to diesel fuel has been proposed as a method to complete the oxidation of carbonaceous particulate matter and associated hydrocarbons. In addition many oxygenate have high cetane number and their association with diesel results in high cetane number and hence lower exhaust emissions. Due to this advantages, there is growing interest in the introduction of oxygenates into diesel fuel. The performance and emission characteristics of two kinds of oxygenates 2-Ethoxy Ethyl Acetate, 2-Butoxy Ethanol with three different blends were investigated.
Technical Paper

Performance Fuel Economy and CO2 Prediction of a Vehicle using AVL Cruise Simulation Techniques

The determination of power train is one of the fundamental steps in any new vehicle development process. This process is generally iterative in manner and accurate prediction of performance and fuel consumption is required to achieve the different vehicle performance targets. The use of AVL cruise simulation techniques to improve the vehicle development process has been rapidly expanding over the last decade. This simulation technique allows us to speed up the optimization of vehicle and power train parameters (vehicle weights, frontal area, Cd, engine power, engine torque and gear ratios etc.,) in an early stage of the development process. This paper establishes the simulation model of a production vehicle through different stages of vehicle development process.
Technical Paper

Evaluation of Long Drain Gas Engine Oil on Heavy Duty Engine Using Hydrogen Blended CNG

The ever increasing demand of fuels for vehicles can only be met by use of alternate fuels like Compressed Natural Gas (CNG) and Hydrogen (H2). The 18 percent hydrogen enriched CNG fuel referred to as HCNG has the potential to lower emissions and is considered to be the first step towards promotion of a Hydrogen economy. While, automotive industry matures up with the usage of new engines, lubricant manufacturers are also moving on to the next stage by formulating oils to be used in gas engines such as CNG, HCNG etc. This paper presents the evaluation of gas engine oil on 6-cylinder heavy duty CNG engine using HCNG. The six cylinder engine was chosen due to its importance for urban bus transportation. The engine was optimized for using HCNG fuel. Initial performance of the engine using HCNG was compared vis-à-vis CNG and, thereafter, the engine was subjected to endurance test of 500 hours as per 8 mode engine simulated driving cycle.
Technical Paper

Implementation of Design Thinking, to Improvise the Engine Stop/Start System for Enhanced Benefits in Real Time Driving Conditions in India

Engine Stop/Start System (ESS) is a prominent subsystem in the Micro Hybrid Systems, and helps to reduce greenhouse gas emissions and fuel consumption. Fundamentally, ESS detects the idle running of the engine, and shuts it down autonomously, and allows the driver to restart the engine, with a routine action like pressing or releasing the clutch or brake pedal. When an engineer designs a system like ESS, typical approach to trigger the system functions is by establishing a sequence of events, detecting it, and enabling the triggers. Influence of the functions on other vehicle systems or vice versa is also considered, and system design is revised to achieve the functional safety. This results in a set of hard rules to be followed for the system functions to work.
Technical Paper

A Method for Estimating the Improvement in Fuel Economy, for a Vehicle with Intelligent Alternator Control, and Application in Connected Car Systems

Micro hybrid Systems are emerging as a promising solution to reduce the fuel consumption and greenhouse gas emissions in emerging markets, where the strict emission requirements are being enforced gradually. Micro hybrid Systems reduce the fuel consumption and greenhouse gas emissions in a conventional vehicle with 12 V electrical system, by optimizing the electrical energy generation, storage, and distribution, with functions like Intelligent Alternator Control, Engine Stop/Start, and Load Management. With the advent of Connected Car Systems, information about the vehicle is seamlessly provided to the customer not just through the Human Machine Interface systems within the vehicle, but to other mobile devices used by the customers.
Technical Paper

An Innovative Control Algorithm for Engine Stop/Start for Vehicles with Manual Transmission, Derived through Analysis of On-Road Test Data

Micro and Mild Hybrid Systems is a bracket term, which covers functions like Engine Stop/Start (ESS), Intelligent Alternator Control (IAC), and many others, which collectively aim at optimizing the fuel consumption by preventing the wasteful running of the engine. Engine Stop/Start system is the prominent part of the Micro/Mild hybrid systems and is the most significant contributor while reducing the fuel consumption and greenhouse gas emissions. In the previous work of the Authors, various issues related to ESS were discussed in detail. ESS is not so popular among the customers, due to the complexities of the system operation and poor integration of the system design with the customer behavior. In addition, due to various functional safety conditions, and the traffic conditions, the actual benefits of ESS are negatively impacted. Therefore, it becomes necessary to have a different approach to the design of the systems like ESS.