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Ride- Comfort Analysis for Commercial Truck using MATLAB Simulink.

ARAI Academy.-Sarnab Debnath
Automotive Research Association of India-Mohammad Rafiq Agrewale
  • Technical Paper
  • 2019-28-2428
To be published on 2019-11-21 by SAE International in United States
Ride Comfort forms a core design aspect for suspension and is to be considered as primary requirement for vehicle performance in terms of drivability and uptime of passenger. Maintaining a balance between ride comfort and handling poses a major challenge to finalize the suspension specifications. The objective of this project it to perform ride- comfort analysis for a commercial truck using MATLAB Simulink. First, benchmarking was carried out on a 4x2 commercial truck and the physical parameters were obtained. Further, a mathematical model is developed using MATLAB Simulink R2015a and acceleration- time data is collected. An experimentation was carried out on the truck at speeds of 20 kmph, 30 kmph, 40 kmph and 50 kmph over a single hump to obtain actual acceleration time domain data. The model is then correlated with actual test over a single hump. This is followed by running the vehicle on Class A, B & C road profiles to account for random vibrations. Similarly, a simulation is done on MATLAB Simulink and a correlation is established between simulated and actual…

Review of architecture and control strategies of Hybrid Electric and Fuel Cell Technology for Automotive Application

ARAI-Rakesh Vilasrao Mulik
VIT Universtity-Senthil Kumar Senthilkumar
  • Technical Paper
  • 2019-28-2509
To be published on 2019-11-21 by SAE International in United States
Well-functioning and efficient transport sector is a requirement for economic and social development in the 21st century. Another side of this transport sector is responsible for a many negative social and environmental effects, like a significant contribution to global greenhouse gas emissions, air pollution and reduction in fossil fuels resources. It is need of time to shift to a greener and low carbon economy and for that it is necessary to improve the ways in which energy is produced and used. Other energy sources like battery, fuel cells (FC), supercapacitors (SC) and photovoltaic cells (PV) are the alternative solutions to the conventional internal combustion engines (ICE) for automobiles. Development of Hybrid electric vehicles (HEV) along with other cleaner vehicle technologies like Fuel cell electric vehicles (FCV), battery electric vehicles are continuously increasing in the list of green energy options. This paper presents a comprehensive review on various control strategies and Energy Management Systems (EMS) proposed and developed for HEVs. This paper revisits architecture of HEVs and different types of HEVs. An optimum control strategy for…

Effect of Gasoline-Ethanol blends on GDI engine to reduce cost of vehicle ownership

Mahindra & Mahindra-Karthikeyan N Krishnan
Mahindra & Mahindra Ltd-Kartick Ramakrishnan, Padmavathi Ramadandi
  • Technical Paper
  • 2019-28-2379
To be published on 2019-11-21 by SAE International in United States
A major challenge for combustion development is to optimize the engine for improved fuel economy, reduce greenhouse gases. Stringent CAFÉ and emission norms require the customer to pay higher capital on vehicles. To offset the cost of ownership- cheaper and alternative energy sources are being explored. Ethanol blend with regular Gasoline and CNG are such alternative fuels. The study was carried on turbo-charged gasoline direct injection engine. The effect of ethanol on engine and vehicle performance is estimated and simulated numerically. The work is split into three stages: first the base 1D engine performance model was calibrated to match the experimental data. In parallel, vehicle level Simulink model was built and calibrated to match the NEDC cycle performance. Second, the thermal efficiency of the ethanol blend is calculated as a linear function of theoretical Otto cycle efficiency. The engine performance for varying compression ratio & ethanol gasoline blend is studied for vehicle level using a MATLAB code. Third, 1D code was run to simulate the high-speed exhaust temperature & low speed knock intensity, this is…


Research & Devlopment Institute-JAGANNATHAN VASU
  • Technical Paper
  • 2019-28-2531
To be published on 2019-11-21 by SAE International in United States
A DIGITALIZED VALIDATION APPROACH FOR REAL TIME AND REMOTE MONITORING OF AN OFF-HIGHWAY VEHICLE PERFORMANCE V.Jagannathan 1.a* , B.Jaiganesh 2.b & S.Sudarsanam 3.c Mahindra & Mahindra Limited, Mahindra Research Valley, Mahindra World City, Anjur PO, TN, India Corresponding author Email- Validation of agricultural tractors is necessary to ensure that these machines perform to their expected potential and are aptly matched with implements. Testing these machineries in real-time while performing activities in the field allows a bigger picture to be seen; the performance data incorporates the effects of many external factors (Soil, Climate etc.). Tractor Performance data apprehending is the vital part of validation. Data acquisition of key performance parameters during field validation in different application/different countries is of utmost importance. Most prevailing methodology in Tractor validation is by capturing the performance parameters such as Fuel consumption, Area coverage, Wheel slip, Engine rpm drop, implement depth of cut, Tractor speed etc. in manual and physical way. These methodologies of capturing performance parameters are tedious, time consuming, involves manpower, not so secured or safe. The readings…

An Energy Harvesting E-SHOCK for Future Mobility

Schaeffler Group-Prajod Ayyappath
Schaeffler India Ltd-PS SATYANARAYANA, Kalyan Bhairi
  • Technical Paper
  • 2019-28-2506
To be published on 2019-11-21 by SAE International in United States
India has emerged as the world’s biggest market for Two-wheelers and Four-wheeler. Besides rising incomes and growing infrastructure in all areas, one big reason for the spurt in sales has been ease of zipping in and out of chaotic city traffic along with road irregularities and potholes. Furthermore, the efficiency increase in the Shock absorber within the vehicle have high demands to use of regenerative solutions, in which e-system can be employed as to recover part of the energy otherwise dissipated in form of heat. The Smart e-Shock can charge battery and illuminate accessories of vehicle. Also, the e-shock can provide the various damping characteristics by changing the Electric load on to it to make system as Semi-Active Suspension. This Smart e-Shock system is based on unique and patented concept of constraining the reciprocating motion of the shock absorber in to a single sense of rotation of e-system and the energy is recuperated and given to the battery from the e-system. This retrofittable design can provide better vehicle dynamics-with various driving modes (Comfort, Normal, Sport,…

IOT based Battery Diagnostics for Battery swapping station.

College of Engineering Pune-Rushikesh Subhashchandra Kshirsagar, Dipali Dange
  • Technical Paper
  • 2019-28-2441
To be published on 2019-11-21 by SAE International in United States
An electric vehicle is significantly promoted by government and industry to reduce carbon footprint and effective energy management. IC engines get replaced by the battery and diagnosis parameters of engine also need to replace with battery parameters. Main objective is to provide analysis of battery to battery swapping stations. State of charge and state of health plays important role in battery management system and vehicle performance. State of health estimation has many techniques, but large equipment needs for it and become costlier and bulkier. Batteries internal resistance increases as it gets degraded, proposed technique based on adaptive method which didn’t need any extra hardware, this technique identifies the health based on degraded capacity. Cloud platform is used to store the data and process it and display to users and swapping station. Status updating unit located on battery is connected to cloud and it gives complete analysis of battery to vehicle users. Analysis of battery parameter can be observed at battery swapping station with corresponding ID on a cloud server. This system proposed complete analysis of…

Steering and Handling Performance Optimization Through Correlation of Objective - Subjective Parameters and Multi-body Dynamics Simulation

Mahindra & Mahindra Ltd-Deva Ranjit Kumar rajarajan, Vinothprakash rajasekar, Shraddhesh rasal, Baskar Anthonysamy, Visweswara LENKA.
  • Technical Paper
  • 2019-28-2412
To be published on 2019-11-21 by SAE International in United States
RESEARCH OBJECTIVE: Automobile Industry has driven through the ages with continuous development with innovative technologies and frugal engineering. Expectation of customer is also increasing through the generations. To meet the customer demand for performance and be best in market, OEM needs to deliver best performance of vehicle with cost effective and short development process. Steering and Handling of vehicle is one of major customer touchpoints and needs to be tuned to achieve various conflicting requirements. The objective of this research is to optimize the steering and handling using correlation between three major methods of evaluation. METHODOLOGY: Methodology for optimization of steering and handling performance using correlation between subjective evaluation, objective measurement and multi-body-dynamic simulation is presented. In first phase, correlation of objective steering & handling parameters is established with subjective evaluation, based on evaluation of various vehicles in SUV segment. The objective parameters which give highest correlation are selected for target setting process. In second phase, Multi-body dynamic(MBD) model is developed in MSC ADAMS and is validated through physical kinematic and compliance data. Components such…

Aerodynamic analysis on under body drag and vehicle performance of active front spoiler for high CG vehicles

Vellore Institute of Technology-Shikhar Chaudhary, Prabu Krishnasamy, Rishabh Kothari, Govindasamy Rajamurugan
  • Technical Paper
  • 2019-28-0025
To be published on 2019-10-11 by SAE International in United States
Vehicle aerodynamic drag reduction is the effective technique to enhance the fuel economy, performance and top speed of a vehicle. The contribution of the under body parts like wheels, wheel arch and wheel housing accounts for about 40-50% of the total drag of a car, which further increases in case of vehicles with higher CG. Thus, it seems logical to focus attention on the under body aerodynamic drag reduction. In this study an active spoiler is placed towards the front end of the vehicle which will divert the air flow from front towards the radiator. The active spoiler revolves according to the signals received from the radar sensors placed at the lower end to detect obstacles which will prevent it from damage. The objective of this study is to examine the effect of the air flow diversion on under body drag. The effect of air flow diversion on fuel consumption, radiator effectiveness and top speed is numerically evaluated. A Renault Duster model is considered for the study as base model designed in DS Solidworks 2018…

Performance Analysis of an Automated Manual Transmission Controller for Two-wheeler

ARAI Academy-Kiran Pralhad Wani
CoEP-ARAI Academy-Saurabh Sunil Patil
  • Technical Paper
  • 2019-28-0125
To be published on 2019-10-11 by SAE International in United States
This research paper presents controller development and performance analysis for the two-wheeler. The comparison for different performance parameters is carried out with and without automated manual transmission (AMT) controller. The AMT considered, in this case, includes a conventional manual transmission gear-box with a conventional clutch pedal. It is equipped with clutch actuation with the help of linear actuator and the gear shifting using a servo motor. The upshift and downshifting of the gears and the clutch actuation is done through the decisions of the controller. The results generated during the engine dynamometer test are used as input creating a two-wheeler vehicle model using AVL cruise software. This vehicle model is used to predict vehicle performance. These vehicle performance results are validated with chassis dynamometer test data. The vehicle model is modified for the generation of gear shifting plot. AlsoGear shift program (GSP) is generated using the GSP generation module of AVL cruise software. The two criteria used for GSP generation are fuel economy and vehicle acceleration performance. The simulation results include generation of gear shifting…

Combined Optimization of Energy and Battery Thermal Management control for a Plug-in HEV

FEV Italia S.R.L.-Michele Caggiano
University of Bologna-Gabriele Caramia, Nicolo Cavina, Alessandro Capancioni, Stefano Patassa
  • Technical Paper
  • 2019-24-0249
To be published on 2019-10-07 by SAE International in United States
This paper presents an optimization algorithm, based on discrete dynamic programming, that aims to find the best control inputs both for energy and thermal management control strategies of a Plug-in Hybrid Electric Vehicle, in order to minimize the energy consumption over a given driving mission. The chosen vehicle has a complex P1-P4 architecture, with two electrical machines on the front axle and an additional one directly coupled with the engine, on the rear axle. In the first section the algorithm structure is presented, including the cost-function definition, the disturbances, the state variables and the control variables chosen for the optimal control problem formulation. The second section reports the simplified quasi-static analytical model of the powertrain, which has been used for the backward optimization. For this purpose, only the vehicle longitudinal dynamics have been considered. In order to validate the algorithm, the quasi-static model has been simulated in a forward-facing approach, using as control inputs the results of the backward optimization. The third section describes the Model-in-the-Loop environment of the vehicle, implemented in Simulink. In particular,…