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Approach for standardization of Advanced Driving Assistance System (ADAS) in India

International Centre For Automotive Tech.-Aditi Sethi
  • Technical Paper
  • 2019-28-2464
To be published on 2019-11-21 by SAE International in United States
Authors: Aditi Sethi1, Siddhanta Shrivastava2, Madhusudan Joshi3 Organization: 1,2,3 International Centre for Automotive Technology, Manesar Introduction: With the increasing utilization of electronics in Indian automobile industry, there is an essential requirement for standardizing the functional safety of sub-systems that constitute advanced driving assistance system (ADAS) as it would be the foundation stone for the automated vehicles in future. These systems assist the driver and the driving process, further increasing the car safety and road safety, subsequently reducing human error. Due to interaction of several electronic control units (ECUs) in a vehicle and complexity of the system, electronic stability plays a vital role. Therefore, the standards shall be more performance oriented and technology neutral. They shall also cover validation tests associated with safety, mechanical rigidity, durability, environmental protection and electromagnetic compatibility. Standardization of ADAS would authenticate the quality, regulate and smoothen the uniform implementation of these sub-systems. Interestingly the standardization of ADAS is in progress at the international level. It is therefore pertinent to consider adoption, formulation or both of international standards as a part of…

Miniaturized and sleek protective device

Mahindra & Mahindra, Ltd.-Priyanka Marudhavanan
  • Technical Paper
  • 2019-28-2535
To be published on 2019-11-21 by SAE International in United States
A miniaturized and sleek protective device M. Priyanka, Mahindra&Mahindra, India D. Boobala Krishnan*, Mahindra&Mahindra, India T.Vijayan, Mahindra& Mahindra, India Keywords-Fuse, Lightweight. Research and/or Engineering Questions/Objective: Now-a-days there is lot of advancement coming in automobiles. Earlier the electronics were used in engine and engine compartment areas. Now all hydraulics and transmission have been operated by electronics. The role of electronics like sensors, actuators increasing day by day for lifting and moving operations. With increase in electronics circuit, there is complex in wiring harness and packaging space for fuse box is premium Limitations: Limitations of placing other devices. Occupy more space and weight in the vehicle. Packing constraint due to vibration and thermal management issues. Methodology: Two different fuse of same rating can be given in one fuse and we can reduce the wire size. By this method we can save many fuses and reduce the fuse box size. An optimized fuse box minimizes the length of circuit. It translates the system into less plastics. This type of system is highly useful in systems such as ECU…

Improved update-over-the-air solution through standardization of ‘software/firmware package format and flash jobs’

Elektrobit India-Pavithra Kumaraswamy
  • Technical Paper
  • 2019-28-2435
To be published on 2019-11-21 by SAE International in United States
This paper investigates and proposes the possibilities of standardizing the software/firmware package format and flash jobs in order to provide the possibility of productizing the update-over-the-air solution regarding on-board vehicle components and make use of it in all OEMs with minimum configuration changes and customization. The update-over-the-air solution in the automotive sector is provided by various suppliers and needs to be customized to meet various OEMs requirements. Possible Variants of OEM requirements are: • Variant 1 o Customer Portal + Backend + vehicle on-board components solution from supplier • Variant 2 o Customer Portal + Backend solution from OEM o Vehicle on-board components from supplier • Variant 3 o Backend from OEM o Customer Portal + vehicle on-board components from supplier ODX, VBF, and many other formats from OEMs include software/firmware packages. With variant 1, these different formats are converted into one supplier proprietary format and is saved in backend and understood by the vehicle on-board components for re-programming of target ECUs. With variant 2 and variant 3, these different OEM formats have to be…

Parametric Calculation and Significance of Engine Dynamic Torque in Performance Benchmarking of a Vehicle

Mahindra Research Valley-Praveen Kumar Ramani, Bharathraj Jayaraman, Sangeetha Ramasamy Thiruppathi
  • Technical Paper
  • 2019-28-0028
To be published on 2019-10-11 by SAE International in United States
The automotive industries around the globe is undergoing massive transformation towards technological capability to meet stringent legislative norms on fuel economy and emission. It is a challenging process to meet the regulatory standards without compromising on performance. The torque delivered by the engine at wide open throttle position in a transient condition from low idle to higher engine rpm is known as dynamic torque, which always need not to follow the defined FTP curve. The engine dynamic torque plays a crucial part in performance benchmarking of a vehicle as a visualization parameter to set the project targets. There exist a few methodologies to measure the engine brake torque like direct measurement using torque transducer which adds complexity and cost to the vehicle, ECU measured torque based on amount of fuel injection and empirical calculation using known engine speed. Since every method is having their own capabilities, limitations and none of them are efficient to capture real transient torque behavior of an engine. This work elaborates about the role of dynamic torque on performance improvement and…

Braking Requirements for Optimizing Autonomous Emergency Braking Performance

Applus IDIADA-Álvaro Esquer Molina, Jordi Bargallo
  • Technical Paper
  • 2019-01-2127
To be published on 2019-09-15 by SAE International in United States
Vehicle technology new developments have contributed to improve vehicle structural performance and therefore passive protection, but also the inclusion of electronic control units has provided new opportunities to expand active safety systems. This is the case for systems like anti-lock braking systems (ABS), electronic stability control (ESC) and brake assist (BA) among others. A more advanced generation of active systems includes sensorial units that monitor vehicle’s surrounding and detect potential hazards, such as an imminent collision, and performs an automatically and commanded emergency braking to lessen or mitigate the consequences of the impending accident. For this latest system, the so-called autonomous emergency braking (AEB), various consumer testing protocols, such as Euro NCAP protocols [1], propose and periodically update test catalogues in order to evaluate the performance of such systems and later to inform potential consumers.The aim of this study is to investigate the means of improving AEB performance in terms of efficiency and driver acceptance. For this, performance of current AEB system will be studied and compared with the limits of vehicle’s braking capabilities.

Virtual Chassis Dyno for Diesel Engine Tuning and Calibration

RENAULT SAS-Damien Maroteaux
  • Technical Paper
  • 2019-24-0076
To be published on 2019-09-09 by SAE International in United States
Since WLTP introduction, Exhaust Emission standards are now based on real driving conditions. The tuning and calibration work for Engine-out Emissions and Exhaust After-treatment Systems must therefore include all driving conditions in real life use of the vehicle. This includes temperature conditions, altitude, vehicle load and driving style. As a consequence the workload, cost and duration of the engine and after treatment system calibration activities, based on physical tests as today , are no more compatible with realistic development targets. The purpose of the methodology described in this paper is to replace chassis dyno vehicle tests by Hardware in the Loop, using only the Engine Electronic Control Unit as physical part. The vehicle, driver, engine, gearbox are all modeled by 0D/1D simulation running in real time. The methodology used to build the simulation models is described. A Design of Experiment Approach based mainly on steady state engine testing is used to build the engine-out emission model. A very extensive work has been done to validate the method, by comparing results from the model with vehicle…

Potential of 1D Thermo-Fluid Dynamic Modeling in Reducing the Experimental Effort Through the Comparison of the Achievable Calibration Performance

Teoresi Spa-Francesco de Nola, Andrea Molteni, Roberto Tortora lng
Universita di Napoli Federico II-Giovanni Giardiello, Alfredo Gimelli, Massimiliano Muccillo
  • Technical Paper
  • 2019-24-0013
To be published on 2019-09-09 by SAE International in United States
Over the last decades, internal combustion engines have undergone a continuous evolution to achieve better performance, lower pollutant emissions and fuel consumption. This evolution involved changes in the engine architecture needed to perform advanced management strategies. Therefore, Variable Valve Actuation, Exhaust Gas Recirculation, Gasoline Direct Injection, turbocharging and powertrain hybridization have wide application in the automotive field. However, the effective management of a such complex system is due to the contemporaneous development of the on-board engine electronic control unit (EECU). In fact, the additional degrees of freedom available for the engine regulation highly increased the complexity of engine control and management, resulting in a very expensive and long calibration process. To overcome the drawbacks related to extensive calibration process, this study proposes an effective methodology based on the adoption of 1D thermo-fluid dynamic modelling. In particular, a 1D CFD engine model, properly calibrated starting from a reduced number of experimental data adopted to solve specific vector optimization problems, is used as in a virtual test bench to provide a detailed engine data sheet and then…

Recommended Practice for Pass-Thru Vehicle Programming

Vehicle E E System Diagnostic Standards Committee
  • Ground Vehicle Standard
  • J2534_201907
  • Current
Published 2019-07-29 by SAE International in United States

This SAE Recommended Practice provides the framework to allow reprogramming software applications from all vehicle manufacturers the flexibility to work with multiple vehicle data link interface tools from multiple tool suppliers. This system enables each vehicle manufacturer to control the programming sequence for electronic control units (ECU’s) in their vehicles, but allows a single set of programming hardware and vehicle interface to be used to program modules for all vehicle manufacturers.


Accelerated Secure Boot for Real-Time Embedded Safety Systems

SAE International Journal of Transportation Cybersecurity and Privacy

Rhein-Waal University of Applied Sciences-Kleve, Germany-Wonder Gumise
University of Michigan-Dearborn, USA-Ahmad M.K. Nasser, Di Ma
  • Journal Article
  • 11-02-01-0003
Published 2019-07-08 by SAE International in United States
Secure boot is a fundamental security primitive for establishing trust in computer systems. For real-time safety applications, the time taken to perform the boot measurement conflicts with the need for near instant availability. To speed up the boot measurement while establishing an acceptable degree of trust, we propose a dual-phase secure boot algorithm that balances the strong requirement for data tamper detection with the strong requirement for real-time availability. A probabilistic boot measurement is executed in the first phase to allow the system to be quickly booted. This is followed by a full boot measurement to verify the first-phase results and generate the new sampled space for the next boot cycle. The dual-phase approach allows the system to be operational within a fraction of the time needed for a full boot measurement while producing a high detection probability of data tampering. We propose two efficient schemes of the dual-phase approach along with calibratable parameters to achieve the desired tamper detection probability. We evaluate the tampering detection accuracy within a simulation environment. Then we build a…
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Electromechanical Actuators Specification Guide

A-6B3 Electro-Mechanical Actuation Committee
  • Aerospace Standard
  • ARP5754
  • Current
Published 2019-06-10 by SAE International in United States
This Aerospace Recommended Practice (ARP) provides general characteristics, requirements, and design data to be recommended for inclusion in a procurement technical specification of an electromechanical actuator (EMA), including its control and monitoring.
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