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Vehicle Interior cleanliness tracker

Aptiv Components India Pvt Ltd-Anitha Loganathan
Aptiv Components India Pvt, Ltd.-Vijayalakshmi kr
  • Technical Paper
  • 2019-28-2466
To be published on 2019-11-21 by SAE International in United States
The future of mobility is being driven towards fully autonomous driving. As a result, people spend majority of the time in vehicles for chores other than driving. The focus of automotive makers shifts towards providing best-in-class passenger comfort. One of the least focused area in passenger comfort is vehicle interior cleanliness which requires periodic human intervention. An intelligent vehicle can outsmart a human by self-caring to maintain the cleanliness elements on floor, seat and roof. This paper addresses subjects like wetness, dirt and stains in the vehicle interior utilizing the capability of Interior sensing platform. An internally mounted camera in the vehicle can capture images of the interior and apply image processing techniques to identify the subjects mentioned above. The wetness on the floor mats can lead to moldy odor, corrosion, failure of the electronic components in the car. Over a period, the vehicle upholstery or seats absorb the dirt and stains and lead to foul smell. HVAC can be used for drying the interior as appropriately detected by the system. A modern system to…
 

A novel method of Improving Ride Comfort of Two Wheeler by Optimization of Seat Parameters.

Carmel Polytechnic College-Francis Augustine Joseph
Saingits College of Engineering-Arun Kottayil Varghese
  • Technical Paper
  • 2019-28-0013
To be published on 2019-10-11 by SAE International in United States
Two-wheeler plays a significant role in personal transportation in India. People prefer two-wheelers, which has better fuel economy, comfort, and performance. It is vital to enhance comfort, as the seat is in direct contact with the user. Better user comfort improves the vehicle feel and behavior. Dynamic comfort analysis is necessary to understand and improve the vibration characteristics of the human-seat system. The vibration characteristics under analysis are Natural frequency, Maximum transmissibility, Attenuation frequency, and Transmissibility at 6 Hz. A test set-up was developed to collect data samples with different seat characteristics. The data collected from the seat are IFD, Hysteresis, Air-Permeability, Resilience, Thickness, and Mass. The relation between the seat parameters and vibration characteristic is established by statistically analyzing the data. Best seat was identified by ranking vibrational characteristics. Correlation analysis determines the best seat by subjective rating of the sample and seat vibration ranking. Keywords: Transmissibility, two-wheeler seat, Polyurethane foam, Comfort and fatigue, correlations, ride comfort, Vibration Isolation,Optimization.
 

Design for Adaptive Rear floor carpet for changing shapes and complex architecture

Mahindra & Mahindra, Ltd.-Praveen Kumar, Ramakrishna Nimmagadda, Harshad Bornare, Nareen Kinthala
  • Technical Paper
  • 2019-28-0004
To be published on 2019-10-11 by SAE International in United States
Floor carpets in vehicle find their use to hide the metal floor. It is primary designed to protect the floor of a vehicle from dirt, wear, BSR and salt corrosion. The paper presented here proposes an engineering solution for development of an adaptive carpet which can be commonly used across three variants. The three variants have different seating configurations and the mounting strategies are specifically designed to cater to the needs of the particular variant which requires the development of different rear carpets and underlay NVH felts. This requires heavy investment owing to the requirement of different tools. The paper demonstrates engineering one single Adaptive rear floor carpet meeting mounting requirement of all the three variants and also matching with the carryover front floor & carpet, door scuff plate, RQT and Rear Scuff plate. Single Underlay felt and single carpet is designed considering all three variants seat mounting configurations. It ensures easy identification of the carpet part in built shop and no compromise in the NVH perimeters from the underlay floor. Unique fixations identified for…
 
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Gaining Approval for Seats with Integrated Electronics in Accordance with AC21-49 Option 7b

Aircraft SEAT Committee
  • Aerospace Standard
  • AIR6448A
  • Current
Published 2019-08-07 by SAE International in United States

The primary purpose of this document is to provide roles, responsibilities and accountabilities to meet AC 21-49 Section 7.b ‘Type Certification using TSO-approved seat with electronic components defined in TSO design’. This document may be applied to all applicable seat TSOs (C39(), C127()…etc). The approval for the integration of the electronics will fall, in part or in full, under the type design authority of the Seat Installer rather than the Seat Supplier shipping the integrated seat. The defined responsibilities, areas of authority and accountability of each party, as well as necessary communication protocols, must ensure configuration management, design control and quality control. These definitions, controls and protocols are agreed (thru normal commerical agreements and binding contracts) and adhered to by all parties ensuring all parts in the supply chain remain approved (e.g. certified and conformed).

 

Towards a Quiet Vehicle Cabin Through Digitalization of HVAC Systems and Subsystems Aeroacoustics Testing and Design

Dassault Systèmes SIMULIA-Vincent Vidal, Adrien Mann, Jonas Verriere, Minsuk Kim
Valeo Thermal Systems-Fabrice Ailloud, Manuel Henner, Olivier Cheriaux
Published 2019-06-05 by SAE International in United States
With the rise of electric autonomous vehicles, it has become clear that the cabin of tomorrow will drastically evolve to both improve ride experience and reduce energy consumption. In addition, autonomy will change the transportation paradigm, leading to a reinvention of the cabin seating layout which will offer the opportunity to climate systems team to design quiet and even more energy efficient systems.Consequently, Heat and Ventilation Air Conditioning (HVAC) systems designers have to deliver products which perform acoustically better than before, but often with less development time. To success under such constraints, designers need access to methods providing both assessment of the system (or subsystems) acoustic performance, and identification of where the designs need to be improved to reduce noise levels. Such methods are often needed before a physical prototype is requested, and thus can only be achieved in a timely manner through digital testing. Previous studies have demonstrated the ability of a CFD/CAA approach based on the Lattice Boltzmann Method (LBM) to predict HVAC system noise including real and complex ducts, registers, mixing unit…
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Analyzing Field Environments to Understand Product Failure Causes

Vibration Research-Jade Vande Kamp
Published 2019-06-05 by SAE International in United States
Product failures often require expensive repairs or replacements. Over-engineering adds to recurring costs and its success is uncertain if the failure’s cause is not understood. Engineers need in-depth knowledge before attempting a re-design. This case study focuses on bus seat failures that occasionally occur in the field but are not predicted by current industry standard tests in the lab. The goal was to collect comprehensive field vibration data and analyze that data to understand the failure’s causes. The study used accelerometers placed at various points in multiple seating configurations and across multiple field environments. Analysis identified transmissibility issues between axes of motion, as well as a seat configuration with higher reliability.
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Comparison of Measurement Methods for Evaluating Displacement of Commercial Vehicle Seats

CVG-James Haylett
University of Washington-Peter Johnson
Published 2019-06-05 by SAE International in United States
Measuring the displacements in vehicle seat suspensions and the displacements the seat has to absorb may assist vehicle seat designers in better designing seats to absorb vibrations. Low frequency seat displacement is important in seat design to identify end-stop events and higher frequency shorter displacements are also important since seat components can be optimized to absorb these smaller displacements. Displacements can be directly measured with special instruments, but it would be less complicated if simple, compact accelerometers could be used to measure the seat displacements. This paper compares accelerometer-derived displacement measurements to known displacements derived from sinusoidal physics and field measured random displacements measured with potentiometers. Using known, controlled sinusoidal displacements, three lab-based experiments were conducted to determine how well accelerometers, using double integration, could measure displacements. In addition, using a vehicle travelling on four different road types, the capability of accelerometers measuring random displacement was assessed. In general, the accelerometer-derived displacements matched the known sinusoidal displacement in the lab settings and the potentiometer measured displacements in the field; however, limitations were identified. First, the…
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Protecting high-voltage circuits

Automotive Engineering: June 2019

Lindsay Brooke
  • Magazine Article
  • 19AUTP06_07
Published 2019-06-01 by SAE International in United States

Yazaki readies a new solution for arc suppression in circuits of 48V or more.

As OEMs develop their next-generation electrical architectures aimed at new hybrid, EV and autonomous vehicles, engineers are focused on delivering systems that are even more robust and “fail-safe” than those used today. Handling more power safely is a given, experts say, as more power-gobbling heated seats, electric turbos, active suspensions, lidars, on-board data processors and other safety sensors are added.

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H-Point Machine (HPM-II) - Procedure for H-Point Determination - Benchmarking Vehicle Seats

Human Accom and Design Devices Stds Comm
  • Ground Vehicle Standard
  • J4003_201904
  • Current
Published 2019-04-25 by SAE International in United States

Benchmarking is used to discover the design intent measurements for seating compartments in vehicles when these measurements are either unknown or are specified using differing measurement procedures.

 

Comparison Study of Malaysian Driver Seating Position in SAEJ1517 Accommodation Model

SAE International Journal of Passenger Cars - Mechanical Systems

PROTON Shah Alam, Malaysia-Zuli’zam Rashid
Universiti Teknologi Malaysia, Malaysia-Nooh Abu Bakar
  • Journal Article
  • 06-12-02-0006
Published 2019-04-08 by SAE International in United States
A key element in an ergonomically designed driver’s seat in a car is the correct identification of driver seating position and posture accommodation. Current practice by the automotive Original Equipment Manufacturer (OEM) is to utilize the Society of Automotive Engineering (SAE) J1517 standard practice as a reference. However, it was found that utilizing such guidelines, which were developed based on the American population, did not fit well with the anthropometry and stature of the Malaysian population. This research seeks to address this issue by comparing the SAE J1517 Model against Malaysian preferred driving position. A total of 62 respondents were involved for the driver seating position and accommodation study in the vehicle driver’s seat buck mockup survey and measurements. The results have shown that the Malaysian drivers prefer to sit forward as compared to the SAE J1517 Model and have shorter posture joint angle. This could significantly affect the design of the driver seat positions and layout of other driving elements, suggesting a need to reconsider its application, in particular for the Malaysian population.
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