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Article
2014-01-15
Acoustic performance has become a key competitive factor for off-highway equipment due to an increasing focus on operator comfort and noise pollution as well as continuing regulatory pressure.
Magazine
2014-01-14
Picturing a brighter future Displays are becoming a central focus for automotive interior design, forcing engineers to examine myriad trade-offs related to size, resolution, and supporting electronics.
WIP Standard
2014-01-10
The intent of this standard is to establish a framework to assure that all evaporators for R-744 and R-1234yf mobile air conditioning (MAC) systems meet appropriate testing and labeling requirements. SAE J639 requires vehicle manufacturers to perform assessments to minimize reasonable risks in production MAC systems. The evaporator (as designed and manufactured) shall be part of that risk assessment and it is the responsibility of the vehicle manufacturer to assure all relevant aspects of the evaporator are included. It is the responsibility of all vehicle or evaporator manufacturers to comply with the standards of this document at a minimum. (Substitution of specific test procedures by vehicle manufactures that correlate well to field return data is acceptable.) As appropriate, this standard can be used as a guide to support risk assessments. With regard to certification, most vehicle manufacturers have established formal production part approval processes (PPAP) where compliance certification is established and formally documented.
WIP Standard
2014-01-09
This Standard is restricted to refrigeration circuits that provide air-conditioning for the passenger compartments of passenger and commercial vehicles. This Standard includes analytical and physical test procedures to evaluate concentration inside the passenger compartment. In the early phases of vehicle evaluation, usage of the analytical approach may be sufficient without performing physical tests. The physical test procedure involves releasing refrigerant from an external source to a location adjacent to the evaporator core (inside the HVAC-Module). An apparatus is used to provide a repeatable, calibrated leak rate. If the system has multiple evaporators, leakage could be simulated at any of the evaporator locations. This standard gives detail information on the techniques for measuring R-744 [CO2] and R-1234yf [HFO-1234yf], but the general techniques described here can be used for other refrigerants as well.
WIP Standard
2014-01-09
This Standard describes methods to understand the risks associated with vehicle mobile air conditioning [MAC] systems in all aspects of a vehicle’s lifecycle including design, production, assembly, operation and end of life. Information for input to the risk assessment is provided in the Appendices of this document. This information should not be considered to be complete, but only a reference of some of the data needed for a complete analysis of the risk associated with the use of refrigerants in MAC systems.
Article
2014-01-08
Dassault Aviation has built into its upcoming Falcon 5X flight controls and displays experience not only from the Falcon family of business jets but also from the Rafale multi-role combat fighter.
Article
2014-01-08
Color displays are transforming operator environments as human-machine interfaces make it easier for operators to understand complex tasks and diagnostic information.
Standard
2014-01-07
This document covers the general recommendations for cabin lighting in order to provide satisfactory illumination for, but not limited to: a. Boarding and deplaning b. Movement about the cabin c. Reading d. Use of lavatories e. Use of work areas f. Using stowage compartments, coat rooms, and closets g. Using interior stairways and elevators (lifts)
Standard
2014-01-07
This document presents a glossary of many of the terms that can be found in literature covering issues related to aviation oxygen systems and associated topics. Such a listing can never be all inclusive but the majority of important terms are anticipated to be included for reference.
Standard
2014-01-07
This specification covers the installation of aircraft interior lighting for military aircraft.
Article
2014-01-06
Its CalAmp-supplied module, which plugs into OBD II connector, can access vehicle data such as from the powertrain, but if given OE access, can offer more, including voice command of texting and browsing. With Access Via Mobile coming to Chrysler products later in 2014, popular smartphone apps also will be available on touchscreen.
Standard
2014-01-06
The practice described applies to textile and flexible plastic parts and materials used in automotive vehicles. Special care should be taken when high pile carpet samples are being evaluated. The intent of this SAE Recommended Practice is to specify procedures for the instrumental measurement of color differences brought about by the exposure of textile and flexible plastic automotive parts to various colorfastness tests. It may be used for the specification of limits of color differences which may be tolerated in a specific test.
Article
2013-12-19
As some features quiet children, others interfere with driver concentration on the road ahead, studies by AAA and MIT find. Toyota is testing transfer of tasks to passengers to relieve the driver of cognitive overload.
WIP Standard
2013-12-19
This SAE Standard covers hose and hose assemblies intended for conducting liquid and gaseous R134a and/or R-1234yf refrigerant in automotive air-conditioning systems. The hose shall be designed to minimize permeation of the refrigerant, contamination of the system, and to be functional over a temperature range of -30 to 125 °C. Specific construction details are to be agreed upon between user and supplier. A hose marked “J2064 - R134a”, “J2064 - R-1234yf” or “J2064 - R134a/R-1234yf” signifies that it has been coupled, tested, and has met the requirements of SAE J2064 for the marked refrigerant(s). A hose marked “J2064” without any reference to refrigerant signifies that it has been coupled, tested, and has met the requirements of SAE J2064 for R134a only. It is the hose assembly manufacturer’s responsibility to see that the assemblies meet the specified acceptance criteria for this specification.
WIP Standard
2013-12-10
This SAE Standard covers hose and hose assemblies intended for conducting liquid and gaseous R134a and/or R-1234yf refrigerant in automotive air-conditioning systems. It is the hose assembly manufacturer’s responsibility to see that the assemblies meet the specified acceptance criteria for this specification.
Article
2013-12-09
A collaborative effort of AVL, Eberspächer, Topsoe Fuel Cell, Volvo, and Forschungszentrum Jülich, called the DESTA project, is exploring the benefits of utilizing solid-oxide fuel-cell APUs to help meet heavy-duty truck anti-idling requirements. In 2014, a vehicle demonstration on board a U.S.-market Volvo Class 8 truck will be performed.
Article
2013-12-06
The system has a Tegra 2 graphics processor from Nvidia and Qualcomm Technologies module and can produce 3-D images and deliver download speeds up to 100 Mbps--seven times faster than previous 3G system.
WIP Standard
2013-12-06
1.1 This recommended practice describes two methods for determining the tendency of interior materials used in automobiles and other vehicles to (a) produce a light scattering deposit (fog) on a glass surface, or (b) produce a measurable deposit (mass) on aluminum foil. 1.2 This document is applicable to the measurement of a fog condensate on glass or aluminum foil surfaces within the limits of the test conditions. 1.3 It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to its use.
Article
2013-12-05
Bringing the aftermarket into advanced connected-car era raises technological and legal issues, but SEMA show exhibitors and forum speakers display ability to participate. Aisles of retrofit kits for electronic feature content show aftermarket's intent.
Technical Paper
2013-11-27
Gaurav Adke, Joseph Philip
The application of virtual simulations of crash has become an integral part of the vehicle development process. Virtual simulation offers opportunities to reduce development time and the number of physical prototypes consumed for design verification and validation. With the continuously increase of new accident and regulatory scenarios the dependency to virtual simulation and validation is becoming an inseparable factor in product development. This paper presents simulations that are performed to verify various safety aspects to ensure crashworthiness of the truck cabin. The cabin structure was evaluated for various load cases as per ECER 29 rev 2.0 safety regulation [1]. The FE model and simulation methodology was validated through physical testing and correlated for frontal impact test and roof strength test as per AIS 029/ECE-R 29 rev 2.0 [2]. Paper also discuss on the issue faced in correlation of test vs. Virtual validation using explicit solver.
Technical Paper
2013-11-27
Manali Brahme, Vivek S. Joshi
Automotive exterior lighting systems has several regulatory requirements & most of the manufactures have defined internal standards to achieve desired expectations based on vehicle category. Unavailability of such requirements for interior light illuminating systems has motivated the authors to generate test specifications & measurement methodology. There has been growing interest in automotive vehicle interior lighting for both functional and aesthetic requirements. The purpose of this study is to evaluate the Interior light illuminating devices in terms of “Light harmony”. The lighting harmony is “Maintain the color combination and light intensity level within users comfort zone”. In this study the lighting harmony is measured by means of two methods; one is Subjective evaluation & other is Objective evaluation. The details of these methods are discussed & the available results were analyzed to understand the acceptable limits of light intensity & color combination to achieve expected harmony.
Technical Paper
2013-11-27
Sunil raj, R Kamalanathan
CABIN design is continuously undergoing a huge change for reasons of customer comfort on for meeting regulatory requirement. Consequently the strategic design process will not only consider need for high strength structures but a pragmatic research based approach utilizing the latest technology. Though cab structure is built by a sheet metal blank as per the required dimensions, some locations encounter great amounts of stress and must be designed to withstand the same in a durable way. A possible simpler practice would be to add reinforcements in the high stress area or use high strength material for the entire part. However in this approach weight and cost of the component will be increased. As the weight of the Cabin, vehicle increases this will impact fuel efficiency. Attempts have been taken like using composite materials. This paper deals with the manufacturing of Cab parts like Floor and Floor structure by having tailor made blank using Laser weld technology called Tailor Welded blanks.
Technical Paper
2013-11-27
Rajesh Kashyap, Santhosh Kumar, Venkatesh G K
Mobile Air Conditioner's (MAC) are becoming part of every mobility solution, both for goods and people. Developed nations have started reigning in the side effects for inevitable use of refrigerants during usage and service. The most stringent and current regulation related to servicing of MAC is SAE J2788 for R134a refrigerant. This paper will discuss the parameters influencing AC service and challenges there by. The SAE J standard mandates recharge accuracy of ±15°g at 21 to 24°C temperature on Chevy Suburban for a target charge quantity of 1360 g. Though the standard is limited to testing condition at laboratory temperature, actual conditions in a service workshop would demand higher degree of fine tuning to meet efficient functioning of MAC, despite many controllable and uncontrollable variables. This paper would examine some of such variables and technological approaches adopted in achieving the above requirements. Typically non SAE certified AC Servicing machines may have accuracy of performance limited to certain operating conditions and standard physical constructions.
Technical Paper
2013-11-27
Nishith Verma, Prabhakaran Arumugam, Kaushal Kumar Jha
One of the most essential components of automotive HVAC system is compressor. In a vehicle it is directly mounted on the engine. It derives power from the engine feed system to keep refrigerant moving in the HVAC system of the vehicle. It is also essential to complete the vapor compression cycle. During the operation, it causes considerable load on the engine and thus results in lower fuel efficiency and higher pollution. There are several types of compressors available globally. According to construction it can be classified as reciprocating piston type, scroll type and rotary vane type. The reciprocating piston types of compressors are further classified as fixed displacement and variable displacement. Normally the fixed displacement compressors have good idling cooling performance, but it increases the load on the engine. To reduce the load on the engine and to have good idling cooling performance, generally a variable displacement compressor is used. The use of variable compressors has become impractical most of the time due to complex technology and high cost.
Technical Paper
2013-11-27
Sathish Kumar P, Manikandan M, Mahendra N
The objective of this work is to find cumulative fatigue damage of the truck cabin caused by proving ground data. Stresses in the cabin are derived by finite element analysis using inertia relief method. Multi body simulation software ADAMS was used to obtain the load history at cabin attachment points using measured proving ground data as input. The fatigue damage of the truck cabin was estimated by linear super position method with static results and load history. The calculated numerical fatigue damage results were compared with physical test results and correlated.
Technical Paper
2013-11-27
Sivapriya Balasubramanian, Santosh Gosavi
Vehicle floor vibration is the resultant of different road inputs damped through various transfer paths. Seat comfort, which depends on these floor vibrations, can be evaluated with a single input signal “Pink noise”; which constitutes various road inputs. Transmissibility of seat structure on a vibration shaker with pink noise input includes all possible responses of road inputs. Still, transmissibility profile at vehicle end and component level varies. This is due to the utilization of “dummy” on component level testing on vibration shaker, which acts as a dead weight with dissimilar damping characteristics of human. A transmissibility correlation between human and dummy is attained by replacing the dummy in place of human and actuating it to find the difference in contribution between them for different class of vehicles. This contribution extrapolation from the damping effects of human and dummy is applied on dummy transmissibility. This results in a complete solution for attaining real time vehicle level seat structure transmissibility at component level testing.
WIP Standard
2013-11-26
This document describes operational scenarios and examples of system operation based on the experience of different developers of airborne wake vortex safety systems. This information is intended to supplement the recommendations and guidance given in ARP 6267 “Airborne Wake Vortex Safety Systems” as well as facilitate the application of other wake vortex standards and guidance documents generated by SAE and RTCA.
Article
2013-11-25
As telecom suppliers and insurance companies strive to leverage connected-car technologies and increase revenues from autos, they’re also attempting to reduce the dangers of distracted driving. Sprint has focused on texting while driving, coming out with a tool that will block texting functions when the vehicle is in motion.
Article
2013-11-25
Infotainment systems often account for a solid portion of the 100 million or so lines of code on today’s vehicles. That’s prompting many product developers to turn to open-source software, which can trim the development cycle roughly in half.
Standard
2013-11-20
This SAE Standard applies to refrigerant identification equipment to be used for identifying refrigerant HFC-134a (R-134a) and HFO-1234yf (R-1234yf) refrigerant when servicing a mobile A/C system or for identifying refrigerant in a container to be used to charge a mobile A/C system. Identification of other refrigerants is the option of the equipment manufacturer, although it shall not misidentify refrigerants, per 3.2.
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