The SAE MOBILUS platform will continue to be accessible and populated with high quality technical content during the coronavirus (COVID-19) pandemic. x

Your Selections

Computer software and hardware
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Committees

Events

Magazine

Series

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

On-Board Post-Combustion CO2 Capture in Light-Duty and Heavy-Duty transport

Politecnico di Milano-Davide Bonalumi, Stefano Campanari
  • Technical Paper
  • 2020-37-0012
To be published on 2020-06-23 by SAE International in United States
The European Union set the CO2 emission limit in the transport sector that will decrease in the next years. The purpose of this work is to assess through technical analysis, a system that captures part of the CO2 from the exhaust gases of duty vehicles. Two distinct categories of vehicles are considered, those with a mass lower than 3.5 tons and those with a higher mass. For the light-duty category, the analysis is developed estimating the consumptions and emissions based on the WLTP homologation cycle by means of the software Excel. For the heavy-duty category, the consumptions and the emissions are determined by means of the software specifically developed by the European Union for heavy-duty vehicles named VECTO (Vehicle Energy Consumption calculation Tool). From a literature review, different technologies are considered. The most suitable technology is selected. A possible way is based on the adsorption through the metal-organic framework (MOF). A dedicated review to select the most promising material indicates which can assure the best performance. The performances are evaluated based on the features of…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

CAE Support to Vehicle Audio Installation Issues

Volvo Car Corporation-Andrzej Pietrzyk
  • Technical Paper
  • 2020-01-1575
To be published on 2020-06-03 by SAE International in United States
Audio CAE is an emerging area of interest for a vehicle OEM, despite the fact that the development of the audio system is often left to a specialized supplier. Especially the questions regarding early stages of the vehicle design, like choosing the possible positions for speakers, deciding the installation details that can influence the visual design, and integration of the low frequency speakers with the body & closures structure, are of interest. Therefore, at VCC, the development of the CAE methodology for audio applications has been undertaken. The long term goal is to enable performing subjective evaluation of sound in a virtual car, and integrating audio evaluation in the NVH simulator. The key to all CAE applications is the loudspeaker model made available in the vibro-acoustic software used within the company. Such a model has been developed, implemented and verified in different frequency ranges and different applications. The applications can be divided into the low frequency ones (concerning the installation of woofers and subwoofers), and the middle/high frequency ones (concerning the installation of midrange and…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Hybrid Approach for the Assessment of Paths in Pass by Manoeuver

Centro RIcerche Fiat S.C.p.A.-Domenico Amodeo
Centro Ricerche Fiat S.C.p.A.-Marco Danti, Massimo Biasiolo
  • Technical Paper
  • 2020-01-1550
To be published on 2020-06-03 by SAE International in United States
Current vehicle regulations demand for a challenging decrease in the overall exterior noise as a benefit for the health of citizens and road users. New limits have been implemented in UN R51.03 (based on ISO 362-1:2015) to reduce the emitted noise both at constant speed and in full load so as to cover most of the real urban driving conditions. In order to achieve those targets the carmakers have to refine the trim of their vehicle and an experimental approach can take place too late. This paper shows a method for the pass by noise simulation exploiting the numerical transfer functions and a library of experimentally characterized sources with the aim to reduce the noise and find out a better tradeoff between costs and effectiveness of the modifications. Moreover a simple software tool for the treatment of the data and to ease the workflow has been created and used for the rank assessment of the different paths.
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Effective Method for Active Sound Design

FEV Europe GmbH-Georg Eisele, Benedikt Streicher, Simon Lange, Christoph Steffens, Thomas Cazaux
  • Technical Paper
  • 2020-01-1539
To be published on 2020-06-03 by SAE International in United States
In modern vehicle acoustics, Active Sound Design (ASD) is a popular method to enhance the interior sound perception of a vehicle. In vehicles with a traditional internal combustion engine, the load dependency of the sound can be increased to give better dynamic feedback. Annoying small-band resonances can be attenuated by boosting the surrounding frequency content, and downsized-engines can be made to sound like the larger ones from former days. However, once a characteristic sound is designed for a specific vehicle, it is a tedious process to transfer this lead-sound to derivatives with a deviating equipment (e.g. same model but different exhaust or audio system). So far, sound designers must adapt the ASD-dataset manually – usually this takes several loops of measuring the car’s interior sound on a track and adjusting the ASD-settings back in the office. This paper introduces a new method of a semi-automated transfer of the interior sound from a sender to a receiver vehicle by using ASD where the sender and every receiver vehicle must be measured only once. The novel software…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Iterative study to improve Air flow distribution on ventilation unit duct using CFD analysis

Subros Limited-ANIT SEN
Subros Ltd-SOMNATH SEN, Arunkumar Goel
  • Technical Paper
  • 2020-28-0030
To be published on 2020-04-30 by SAE International in United States
The aim of this paper is to optimize ventilation unit to meet desirable flow distribution on various ports of the ventilation unit. The adapter is modified and simulation is done on the various design changes. CFD analysis is carried out on the ventilation unit with iterative design and achieved the target airflow and distribution. The analysis been carried out on star CCM+ software. The same been validated on the final proto part developed and tested.
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

A Performance Measurement and Analysis Method for Infotainment System

Hyundai Motor Company-Peace Lee
  • Technical Paper
  • 2020-01-1347
To be published on 2020-04-14 by SAE International in United States
The car infotainment system provides various functions such as navigation, DMB, and external device interworking. In the future, complex new technologies such as remote diagnosis and control, V2X communication, integrated display, and autonomous driving interworking should be reflected. Also, even after mass production, such as smartphones, software must be constantly updated to apply bug fixes and new functions. However, as the internal software modules work together in a complicated way, system performance problems tend to occur due to changes in the software, and if they are not managed from the development stage, more costs must be paid for improvement over time. Moreover, after mass production, the scope of improvement will be limited. Therefore, software must be verified and optimized from time to time to ensure system performance quality from the minimum development process. Generally, various tools are used to verify software performance. Currently, top, perf, strace, gdb, DLT, and bootchart are mainly used on Linux-based platforms. In addition, there is a lack of intuitive statistical information to analyze and judge the overall performance of the…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Leveraging real-world driving data sets for design and impact evaluation of energy efficient control strategies.

General Motors LLC-Bharatkumar Hegde, Steven E. Muldoon
National Renewable Energy Laboratory-Michael O'Keefe, Jeffrey Gonder
  • Technical Paper
  • 2020-01-0585
To be published on 2020-04-14 by SAE International in United States
Modeling and simulation are crucial in the development of advanced energy efficient control strategies. Utilizing real-world driving data as the underlying basis for control design and simulation lends veracity to projected real-world energy savings. Standardized drive cycles are limited in their utility for evaluating advanced driving strategies that utilize connectivity and on-vehicle sensing, primarily because they are non-causal and are typically intended for evaluating emission and fuel economy under controlled conditions. Real-world driving data, because of its scale, is a useful representation of various road types, driving styles, and driving environments. The scale of real-world data also presents challenges in effectively using it in simulations. A fast and efficient simulation methodology is necessary to handle the large number of simulations performed for design analysis and impact evaluation of control strategies. In this study, we present two methods of leveraging real-world data in both design optimization of energy efficient control strategies and in evaluating the real-world impact of those control strategies upon large-scale deployment. Through these methodologies, strategies with highest impact on energy savings were selected…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

A Co-Simulation Platform for Powertrain Controls Development

Hyundai-Kia America Technical Center Inc.-Shihong Fan, Yong Sun, Jason Hoon Lee, Jinho Ha
  • Technical Paper
  • 2020-01-0265
To be published on 2020-04-14 by SAE International in United States
With the advancement of simulation software development, the efficiency of vehicle and powertrain controls research and development can be significantly improved. Traditionally, during the development of a new control algorithm, dyno or on-road testing is necessary to validate the algorithm. Physical testing is not only costly, but also time consuming. In this study, a virtual platform is developed to reduce the effort of testing. To improve the simulation accuracy, co-simulation of multiple software is suggested as each software specializes in certain area. The Platform includes Matlab Simulink, PTV Vissim, Tass Prescan and AVL Cruise. PTV Vissim is used to provide traffic environment to PreScan. PreScan is used for ego vehicle simulation and visualization. Traffic, signal and road network are synchronized in Vissim and PreScan. Powertrain system is simulated in Cruise. MATALB/Simulink serves as master of this co-simulation, and integrates the different software together. It also includes human driver model and a powertrain control function. An ADAS-ISG (Idle Stop and Go) powertrain control algorithm is implemented in Simulink and tested by using the platform under different…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Improved Customer Experience through Electric Vehicle Sound Enhancement

General Motors LLC-Frank Valeri, Glenn Pietila
  • Technical Paper
  • 2020-01-1361
To be published on 2020-04-14 by SAE International in United States
Electric Vehicles are typically thought of as being quiet and refined, but they do come with some unique N&V challenges. Some of these challenges include a natural sound that can be undesirable due to its tonal nature, presence of high frequency, discontinuities in sound, and characteristics and levels that do not always naturally increase with motor torque and vehicle speed. One approach to address those challenges is Electric Vehicle Sound Enhancement (EVSE) which is a software feature embedded within the infotainment system. EVSE can be used to improve the perception of the vehicle by enhancing the preferred natural sounds of the vehicle, masking unusual and annoying components of the sound and aurally conveying information related to the vehicle performance. A jury study was conducted to better understand how EVSE can be used to accomplish this. This paper will summarize a typical EVSE system and highlight some of the tools and methods that can be used to develop an EVSE tuning that mitigates unpleasant sounds while enhancing the customer experience without completely changing the vehicle DNA.…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Test Bench for Static Transmission Error Evaluation in Gears

Politecnico di Torino-Carlo Rosso
Politecnico di Torino / GeDy TrAss-Tommaso Maggi, Claudio Marcellini, Fabio Bruzzone
  • Technical Paper
  • 2020-01-1324
To be published on 2020-04-14 by SAE International in United States
In this paper a test bench for measuring the Static Transmission Error of two mating gears is presented and a comparison with the results obtained with the code GeDy TrAss and a commercial Finite Element software are shown. Static Transmission Error is considered as the main source of overloads and Noise, Vibration and Harshness issues in mechanical transmissions. It is defined as the difference between the theoretical angular position of a gear under load in quasi-static conditions and the real one. This parameter strictly depends on the applied torque and the tooth macro and micro-geometry. The test bench illustrated in this work is designed to evaluate the actual Static Transmission Error of two gears under load in quasi-static conditions. In particular this testbed can be divided in two macro elements: the first one is the mechanism composed by weights and pulleys that generates a driving and a breaking torque up to 500 Nm. The second element is composed by two structures called “support”: one fixed to the floor and the other movable in order to…