Browse Topic: Quality, Reliability, and Durability

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Testing a loooooooooooooooooooooooong alternateExternalId - 7ARP07182025-7-0000000000000000001 (Current)07/18/2025
Testing a loooooooooooooooooooooooong alternateExternalId - 7
A-5B Gears, Struts and Couplings CommitteeNEW
The Logistic Lasso and Ridge Regression Algorithm-Based Airline Passenger Satisfaction Prediction Model2025-01-716803/19/2025
Airline passenger satisfaction is important for airline operation service quality management. When airline companies carry out advertisement campaigns or plan a marketing strategy, the resources and budgets are not unlimited. Thus, an airline can only focus on improving a few factors that drive passenger satisfaction. To understand the key satisfies for the young and the old adults, respectively, we leverage five airline passenger satisfaction methods to identify the key factors that explain the airline service satisfaction of different passengers. In particular, we investigate and compare the ridge and the Lasso regularization in terms of the resulting model’s sparsity and computational efficiency. The top three important factors that influence the old’s satisfaction are departure and arrival time convenience, legroom service, and baggage handling. Our findings indicate that the young people place a higher value on entertainment, while the old adults place a higher value on usefulness
Ma, Jie, Hu, Song, Wang, Haipeng
Short-Term Prediction of Highway Visibility Level Based on Attention Mechanism LSTM2025-01-721202/21/2025
To improve the accuracy and reliability of short-term prediction of highway visibility level in key scenarios such as short duration and fast changing speed, this paper proposes a short-term prediction method for highway visibility level based on attention mechanism LSTM. Firstly, XGBoost and SHAP methods are used to analyze the factors affecting highway visibility, determine the importance ranking of different influencing factors, and select the factors that have a greater impact on visibility as inputs for the visibility level prediction model. Secondly, based on LSTM as the model foundation network and innovative coupling attention mechanism, a visibility level prediction model based on attention mechanism LSTM is constructed, which can dynamically update the correlation between meteorological feature information at each historical time point and the visibility level at the current prediction time, thereby dividing the importance of information and flexibly capturing important
Ding, Shanshan, Xiong, Zhuozhi, Huang, Xu, Li, Yurong
Intelligent Courier Delivery Scheduling Based on XGBoost Feature Selection and Reinforcement Learning: A Case Study Using Chongqing Cainiao Express Data2025-01-717602/21/2025
This study tackles the issue of order delays in logistics using XGBoost for feature analysis and reinforcement learning for intelligent courier scheduling. Pickup order data from May 1 to October 31, 2023, in Chongqing is analyzed using spatio-temporal statistical methods. Key findings include that order placement peaks at 9:00 a.m., delays peak at 10:00 a.m., and the delay rate is 8.6%. A significant imbalance exists between the regional daily average of dispatchable couriers and order volumes.XGBoost is employed to predict order delays, revealing that pickup location is the most influential factor (27%), followed by courier pickup location (22%). These factors and their relationships are identified as key drivers of delays.To address these issues, a reinforcement learning-based courier scheduling optimization model is developed. The model defines courier location, current time, and pending orders as state variables and adopts an epsilon-greedy strategy for action selection
Wang, Manjun, Yu, Xinlian
Arinc Automation Document - Standard Information Report - PageCount 101 - 150KJH005 (Current)12/19/2024
Arinc Automation Document - Standard Information Report - PageCount 101 - 150
Flight Simulator Engineering and Maintenance Committee
Arinc Automation Document - - Characteristic - PageCount 45 – 100KJH004 (Current)12/19/2024
Arinc Automation Document - - Characteristic - PageCount 45 – 100
Aviation Maintenance Committee
Arinc Automation Document - Standard Information Report - PageCount 151 - 209 KJH006 (Current)12/19/2024
Arinc Automation Document - Standard Information Report - PageCount 151 - 209
Aviation Maintenance Committee
Arinc Automation Document - Standard Specificiation - PageCount 210 - 475KJH007 (Current)12/19/2024
Arinc Automation Document - Standard Specificiation - PageCount 210 - 475
Airlines Electronic Engineering Committee
Arinc Automation Document - Standard Specificiation - PageCount Greater than 475KJH008 (Historical)12/19/2024
Arinc Automation Document - Standard Specificiation - PageCount Greater than 475
Airlines Electronic Engineering Committee
Arinc Automation Document - Standard Characteristic - PageCount less than 45KJH003 (Current)12/19/2024
Arinc Automation Document - Standard Characteristic - PageCount less than 45
Aviation Maintenance Committee
Advancing Implantable Medical Device Reliability with Enhanced Laser Joining TechnologyTBMG-5217712/01/2024
DC-DC Converters for High Reliability eVTOL Auxiliary Power SystemsTBMG-5214712/01/2024
Maximizing the Potential of TPU Extrusion in Medical Tubing ApplicationsTBMG-5216412/01/2024
Whether for vascular catheters or implantable devices, medical tubing must meet tough standards for flexibility, strength, and biocompatibility. That’s why more manufacturers are turning to thermoplastic polyurethanes (TPUs) that strike the ideal balance between these key properties, making them an excellent choice for high-performance medical tubing. Unlocking the best that TPUs have to offer means optimizing the extrusion process. This article looks at why TPUs are a top pick, the common obstacles in extrusion, and the ways manufacturers can fine-tune their process to get the most out of different grades.
Experimental Study on Quality Control and Variable Valve Timing Strategy of Hydrogen Engine for High Efficiency and Low Emission at Low Load2024-01-509510/15/2024
In order to reduce the pumping loss of low loads and maximize the lean combustion advantage of hydrogen, the paper proposes a load control strategy based on hydrogen mass, called quality control, for improving thermal efficiency and emissions at low loads. The advantages of quality control and the effect of VVT on the combustion performance of hydrogen internal combustion engines under low loads were discussed. The results show that when the relative air–fuel ratio (λ) increases to more than 2.5, the NOx emissions are reduced to less than 3.5 g/kW · h at the brake mean effective pressure (BMEP) below 8 bar, especially when the BMEP is less than 5 bar, the NOx is within 0.2 g/kW · h. Compared to quantity control based on air mass, the quality control strategy based on hydrogen mass achieves over a 2.0% reduction in pumping loss at BMEP levels lower than 4.4 bar. Furthermore, it enhances thermal efficiency by up to 5% at low loads, while maintaining NOx emissions within 0.2 g/kW · h at
Li, Yong, Chen, Hong, Fu, Zhen, Du, Jiakun, Wu, Weilong
An eleventh one for CUR-1174PC11-CUR-1174 (Current)04/02/2024
Italic
Flight Simulator Engineering and Maintenance Committee
Integrated testing at lab from road by doing conversion and correlation between Subjective to objective assessment on ride comfort parameter of gear shifting quality in Two- wheeler.2024-26-032701/16/2024
The evaluations of ride comfort in gear shifting have been known as one of the dominant factors for vehicle quality assessment. However, those factors have not been assessed and analyzed objectively in-depth in conjunction and integration with general ride and handling parameters. In recent, the criteria set by customer have changed on account of heightened expectations, resulting in a growing demand for enhanced ride comfort. the quality of gear shifting experienced by a customer is evaluated subjectively on road leads to difficulty in arriving inferences and taking decisions due to variation in responses of people on the same situation. This study is involved the process of conversion from subjective to objective assessment on gear shifting quality by identifying the objective parameters for contributing the quality of gear shifting feel. Measuring and analyzing those parameters like lever travel, lever effort, and noise while shifting during dynamic condition at vehicle level on
Manoranjan, R., K S, Sreekanth
Characterization and Prediction of Interior Noise Quality in Electric Vehicles through Drive Unit End-of-Line Testing (EOLT)2025-01-003905/05/2023
This paper addresses the critical aspect of interior noise quality in electric vehicles (EVs), focusing on the characterization and prediction methodologies employed during drive unit end-of-line testing. The electric drive unit plays a pivotal role in determining the overall Noise, Vibration, and Harshness (NVH) quality of the final product. This study explores the impact of drive unit assembly process variation and individual component tolerance on the NVH characteristics of electric drive units, emphasizing their direct effect on overall vehicle acoustic quality and customer comfort. The research delves into the intricate relationship between drive unit vibrational response, vehicle interior noise, and customer subjective perception, providing valuable insights into their correlation and how they collectively influence user experience and satisfaction. It aims to enhance the understanding of how electric drive unit characteristics contribute significantly to the interior noise
Arvanitis, Anastasios, Parbat, Aniket, Jadhav, Prashant, Raphael, Andrew
Localisation of Ultra-short Sound Emissions from Automotive Components by Using the Sound Field Scanning Method2025-01-009205/05/2023
Design verification and quality control of automotive components require the analysis of the source location of ultra-short sound events, for instance the engaging event of an electromechanical clutch or the clicking noise of the aluminium frame of a passenger car seat under vibration. State-of-the-art acoustic cameras allow for a frame rate of about 100 acoustic images per second. Considering that most of the sound events introduced above can be far less than 10ms, an acoustic image generated at this rate resembles an hard-to-interpret overlay of multiple sources on the structure under test along with reflections from the surrounding test environment. This contribution introduces a novel method for visualizing impulse-like sound emissions from automotive components at 10x the frame rate of traditional acoustic cameras. A time resolution of less than 1ms eventually allows for the true localization of the initial and subsequent sound events as well as a clear separation of direct from
Rittenschober, Thomas
Research on the control strategy of active gear shifting sound quality in the vehicle2025-01-001905/05/2023
The active sound synthesis system of electric vehicles plays an important role in improving the sound perception and transmission of working condition information inside the vehicle. Nowadays, the active sound synthesis system inside the vehicle has become standard in electric vehicles of major Major automobile manufacturing plants to meet the user groups' demand for driving and riding experience. Starting from the existing in-vehicle active sound synthesis algorithm, this paper designs a gear shift control strategy suitable for all working conditions. During acceleration, in order to achieve the gear shifting effect, the motor speed signal is obtained to bias the speed at the shift point. During deceleration, in order to prevent a sudden increase at the shift point, the speed of the deceleration condition is linearly interpolated to make the shifting process of the deceleration condition smoother. During acceleration after deceleration, in order to avoid the uneven sound jump at the
xilong, zhou, Liu, Zhien, Xie, Liping, Lu, Chihua, Yu, Shangbo, GAO, XIANG, yongsheng, wang
angular upgrade testSAE-PP-0782804/11/2023
testing upgrade
Rickard, Christopher
test 03/01auto testauto testauto testauto testauto testauto testauto testauto testauto testauto testauto testSAE-PP-0780701/03/2023
abc test
Mutagaana, Festo
abc test 30/12auto testauto testauto testauto testauto testauto testauto testauto testauto testauto testauto testauto testauto testSAE-PP-0780612/30/2022
Mutagaana, F., "QE Testing 11/2-10 jms edit," SAE MobilityRxiv™ Preprint, submitted November 2, 2022, https://doi.org/10.47953/SAE-PP-07790.
Mutagaana, Festo
SAE TOMORROW TODAY: What Role Do Electric Utilities Have in the EV Space?1336811/17/2022
As demand for EVs grows, so too does the role of electric utilities. From powering the grid to ensuring the reliability of EV charging stations, the electric utility industry plays a pivotal role in accelerating EV adoption. For more than a century, Duquesne Light Company (DLC) has delivered electricity to more than 600,000 customers in the Pittsburgh region. Currently, there are more than 6,000 EVs in DLC's service territory -- and they expect that number to grow to more than 23,000 by the end of 2025. With this projected growth, DLC is not only providing reliable power, but EV information analysis and incentives like a Community Charging Program and Electric Fleet Advisory Service Program. We sat down with Sarah Olexsak, Senior Manager, Transportation Electrification, to discuss the role of electric utilities and how DLC is supporting EV adoption in Western Pennsylvania.
Hineman, Marcie
Why Cleanroom Assembly of Plastic Medical and Electronic Devices Requires Ultrasonic Welding TechnologyTBMG-4646409/01/2022
For years, ultrasonic welding has been used in cleanrooms where plastic components are assembled to complete medical and electronic devices. That is unlikely to change. What is changing, however —rapidly — is the sophistication and complexity of these products and the level of precision and quality required to complete their assembly.
A DFSS approach to optimize the Hood design parameters to improve durability performance2022-01-092303/29/2022
ABSTRACT In the Vehicle front closure development process, it is very important to meet the durability functional attributes such as Fit and finish, slam event and ease of closing effort. Conventionally softer seal & bump-stop stiffness properties are required for better flushness, but a stiffer seal & bump-stop will help to arrest the hood over travel during the slam event. It is always a challenging and iterative process to arrive at an optimum combination of these design parameters to meet both the flushness and slam targets. This paper highlights the six sigma approach to identify the effect of various control factors like Seal & Bump stop stiffness, latch position, bump-stop design clearance to meet the durability functional attributes. This approach suggests optimum design which is less sensitive to noise factors such as build tolerances on the latch position and the bump-stop design clearance. The learnings from this paper will help to improve design at the early stages of the
VS, Krishnaraj, Golla, Rama Raju
Integrated Evaluation of Constant Amplitude Life Tests Towards SN Curves and Endurance Limit 2022-01-030003/29/2022
Establishing SN curves from constant amplitude life tests and locating the endurance limit are indispensable tasks in durability engineering. For both regimes, finite life and endurance limit, there are many approaches available, like linear regression or maximum likelihood. Especially on low load levels, tests may run very long and one may suspend them before failure. Especially the stair case method for evaluating the endurance limit systematically produces almost 50 percent suspended results. Hence, when data for both regimes is available, those run-outs need to be considered in a statistically proper way. If both regimes are evaluated separately it is often ambiguous if a single observations may be used for estimating the endurance limit or for the finite life re-gime. In this paper, we present an integrated approach, for simultaneous evaluation of both regimes. Every single ob-servation is mapped to one of the regimes with certain probabilities. Even more general, our model
Feth, Sascha
A study on editing method of road load spectrum of automobile rubber isolator using time-frequency domain methods2022-01-031403/29/2022
In order to enhance the efficiency of durability testing of automobile parts, a time-frequency domain accelerated editing method of road load spectrum of rubber mount on powertrain was discussed. Based on Stockwell Transform (ST) method and Accumulative Power Spectral Density (APSD), a new time-frequency domain accelerated editing method (ST-APSD) was proposed. The accumulative power spectral density was obtained by ST of the load spectrum signal of automobile powertrain rubber mounting force which is acquired by the real vehicle in the test field. Based on the accumulative power spectral density, the threshold value was proposed to identify and delete the small damage load fragments, and then the acceleration spectrum was obtained. At the same time, the already existed time-frequency domain accelerated editing methods (short-time Fourier transform and wavelet transform) were used to edit the force load spectrum to shorten the length of the spectrum, and the editing effects of the
Zhu, Xijun, Shi, Wei, Qian, Xuepeng, Wang , Fei
Development of a CAE Modeling Technique for Heavy Duty Cargo Weight using a DFSS Methodology2022-01-092503/29/2022
Cargo box is one of the indispensable structures of a pickup truck which makes it capable of transporting heavy cargo weights. This heavy cargo weight plays an important role in durability performance of the box structure when subjected to road load inputs. Finite element representation for huge cargo weights is always challenging, especially in a linear model under dynamic proving ground road load durability analysis using a superposition approach. Any gap in virtual modeling technique can lead to absurd cargo box modes and hence durability results. With the original computer aided engineering (CAE) approach, durability results could not correlate much with physical testing results. It was crucial to have the right and robust CAE modeling technique to represent the heavy weight to provide the right torsional mode of the cargo box and good durability results. As there were multiple variables owing to heavy cargo weight, Design for Six Sigma (DFSS) methodology was used to develop a
Pankaj, Ananta Vijaya, Nazir, Fazil, Zhang, Weidong, Guo, Mingchao
Computation integration2022-01-094703/29/2022
This invention combines optical technology of nanotechnology to produce accessible and reliable data processing. The invention increase security by demanding three key chips to access it. The key chips are the central controls and powersouce of the invention. The invention will revolutionize the way computers are used. The technology suggests advancement of previous computer technology to simplicity. It uses wireless technology to provide greater accessibility. The main claim of this invention is to provide simple data processing. Images (2)
Primous, Matthew
Recycled Personal Protective Equipment (PPE) in Automotive Components: A World-First to Reduce Single-Use Medical Plastic Waste2022-01-090703/29/2022
The Covid-19 pandemic has significantly increased the amount of single-use plastic, especially as personal protective equipment (PPE) like gloves, disinfecting wipes, and medical-grade facemasks have become common among the general public. The need for public health, however, has ushered in a pandemic of another kind: one of environmental harm. Although efforts have been made to prolong use or otherwise reduce waste of these items, many areas have already seen negative effects of both properly discarded and littered PPE. It is estimated 89 million masks are used globally per month, and in the U.S. alone, the healthcare system generates 5 million tons of medical waste annually, not including drastic scale-up during the pandemic. Other countries have up to eighteen times that amount, far exceeding capacity at disposal facilities. To reduce the environmental threat from these items, which have become necessary to maintain public health, the Hyundai-Kia Materials Development Department
Nummy, Amanda
The Study of Time-frequency Domain Accelerated Editing Method for Road Load Spectrum of Automobile Rubber Isolator2022-01-073803/29/2022
In order to improve the efficiency of durability testing of automobile parts, a time-frequency domain accelerated editing method of road load spectrum of rubber mount on powertrain was discussed. Based on Stockwell Transform (ST) theory and Accumulative Power Spectral Density (APSD), a new time-frequency domain accelerated editing method (ST-APSD) was proposed. The accumulative power spectral density was obtained by ST of the load spectrum signal of automobile powertrain rubber mounting force collected by the real vehicle in the test field. Based on this, the threshold value was set to identify and delete the small damage load fragments, and the acceleration spectrum was obtained. At the same time, the existing time-frequency domain accelerated editing methods (short-time Fourier transform and wavelet transform) were used to accelerate the editing of the force load spectrum, and the editing effects of the three time-frequency domain editing methods were compared and analyzed from four
Zhu, Xijun
Development of a Built-in Type Dashboard Camera with Reliability and Usability 2022-01-012003/29/2022
Dashcam, which is considered essential parts of vehicles in Korea, are installed in most vehicles for reasons such as accidents, evidence of threatened driving of other vehicles, and insurance premiums. Aftermarket dashcam have been developed with many improvements such as higher resolution camera and LCD application, but still have problems in usability and durability. The first problem is a separate device mounted on the top of the windshield, which obstructs the driver's view and may injure the driver due to a collision impact. In addition, the connection of the power supply may cause a vehicle breakdown such as a fire due to a worker's mistake or a product defect. Secondly, in order to view the stored video, it is troublesome to remove the SD card and check it on the computer. Moreover, since the LCD is so small, it is difficult to search and play the desired video from the list in many saved files. The third problem is durability and reliability, when operating in the high
Jeong, DongHyuk
Enhanced SAE 3 link Leaf Spring Model to Generate Durability Virtual Loads2022-01-034003/29/2022
Heavy-duty truck vehicles are generally equipped with leaf spring suspensions. Conventionally, beam elements are used in multibody software to build the leaf spring model to calculate virtual loads. Beam elements require a high computation time due to their numerous degrees of freedoms and force components introduced by beam connections, interleaf contacts, friction, etc. Again, in these simulations, solvers frequently fail in durability loads analysis due to sudden spike in accelerations, high suspension articulation coming from severe road profiles. These drawbacks lead to the use of simplified three-link mechanism models to simulate the leaf spring’s behavior, which is computationally faster. However, the current approach is less accurate as compared to the beam element model because this model has only a torsional spring which accounts for vehicle bounce condition. In reality, the leaf spring suspension system is also subjected to cornering and braking while running on road
Dixit, Navnit, Venkatesan, Dhanasekar, Pardeshi, Ravasaheb
Evaluation of the Impact of Driving Cycle and Driving Habits on the Fuel Consumption of Commercial Vehicles2022-01-064003/29/2022
The goal of this study was to evaluate the effect of driving cycle and various driving habits on fuel efficiency. The track tests were conducted based on the SAE J 1321 Fuel Consumption Test Procedure-Type II, with various vehicles in various loading states. Several duty cycles were replicated on the track, such as a local delivery cycle developed based on the operational data, urban school bus cycle, and an aggressive stop-and-go cycle. Drivers were allowed to accelerate and decelerate according to their assigned driving techniques. Therefore, the drivers using moderate driving techniques followed the drive cycle, while the drivers using aggressive and eco-friendly techniques used the speed steps as targets, with varying acceleration and deceleration profiles. For some tests, the drivers noted that for the tests with loaded vehicles, it was difficult to simulate the aggressive technique, the acceleration pedal was not responding well, and there were delays in engaging the gears. The
Surcel, Marius-Dorin
AS13100 Quality Foundations Learning AssessmentC2112.LA02/15/2022
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Steel, Bars, Forgings, Mechanical Tubing and Forging Stock 0.50Cr - 0.12Mo (0.89 - 1.01C)AMS6476F (Current)11/09/2021
This specification covers a low-alloy steel in the form of bars, forgings, mechanical tubing, and forging or tubing stock.
AMS E Carbon and Low Alloy Steels Committee
Inspection, Ultrasonic Product Over 0.5 Inch (12.7 mm) ThickAMS2630E (Current)11/09/2021
This specification covers procedures for ultrasonic inspection, by pulse-echo procedures, of flat, rectangular, round, cylindrical, and contoured products having a thickness or cross-sectional dimension greater than 0.5 inch (12.7 mm), using either contact or immersion methods, and using the longitudinal-wave or shear-wave modes or combinations of the two, as necessary. This specification may apply to testing finished machined parts provided the parts can meet the basic testability requirements, such as size, contour, metallurgical structure, and thickness.
AMS K Non Destructive Methods and Processes Committee
Inspection, Ultrasonic Product Over 0.5 Inch (12.7 mm) ThickAMS2630E-TEST-REC (Historical)11/09/2021
This specification covers procedures for ultrasonic inspection, by pulse-echo procedures, of flat, rectangular, round, cylindrical, and contoured products having a thickness or cross-sectional dimension greater than 0.5 inch (12.7 mm), using either contact or immersion methods, and using the longitudinal-wave or shear-wave modes or combinations of the two, as necessary. This specification may apply to testing finished machined parts provided the parts can meet the basic testability requirements, such as size, contour, metallurgical structure, and thickness.
AMS K Non Destructive Methods and Processes Committee
Steel, Bars, Forgings, Mechanical Tubing and Forging Stock 0.50Cr - 0.12Mo (0.89 - 1.01C)AMS6476F-TEST-REC (Historical)11/09/2021
This specification covers a low-alloy steel in the form of bars, forgings, mechanical tubing, and forging or tubing stock.
AMS E Carbon and Low Alloy Steels Committee
Brake Lining Quality Test ProcedureJ661_202110 (Current)10/26/2021
The purpose of this SAE Recommended Practice is to establish a uniform laboratory procedure for securing and reporting the friction and wear characteristics of brake linings. The performance data obtained can be used for in-plant quality control by brake lining manufacturers and for the quality assessment of incoming shipments by the purchasers of brake linings.
Brake Linings Standards Committee
Low-Alloy Steel, Heat-Resistant, Bars, Forgings, Mechanical Tubing, and Forging Stock 0.95Cr - 0.55Mo - 0.30V (0.40 - 0.50C)AMS6304N (Current)10/22/2021
This specification covers an aircraft-quality, low-alloy, heat-resistant steel in the form of bars, forgings, mechanical tubing, and forging stock.
AMS E Carbon and Low Alloy Steels Committee
Low-Alloy Steel, Heat-Resistant, Bars, Forgings, Mechanical Tubing, and Forging Stock 0.95Cr - 0.55Mo - 0.30V (0.40 - 0.50C)AMS6304N-TEST-REC (Historical)10/22/2021
This specification covers an aircraft-quality, low-alloy, heat-resistant steel in the form of bars, forgings, mechanical tubing, and forging stock.
AMS E Carbon and Low Alloy Steels Committee
Test Slabs, Chloroprene (CR) 70 - 80AMS3217/3D (Current)10/01/2021
This specification covers a standard chloroprene (CR) rubber stock in the form of molded test slabs.
AMS CE Elastomers Committee
Inspection and Test Quality Systems, Requirements for Aviation, Space, and Defense OrganizationsAS9003B09/30/2021
Price increases in effect for this document as of January 2017 reflect a new copyright agreement for use of ISO 9001:2009. This standard includes selected quality system requirements from ISO 9001:2008[1] and AS9100:2009 applicable to noncomplex products and associated manufacturing processes. ISO 9001 text incorporated into this standard appears in standard font; while aviation, space, and defense industry additional requirements, definitions, and notes are presented in bold, italic text. The requirements of this standard are intended to be applied in whole, without any exclusions. Compliance with all corresponding AS9100 requirements is considered to meet/exceed compliance with the requirements of this standard. The requirements specified in this standard are complementary (not alternative) to contractual and applicable statutory and regulatory requirements. Should there be a conflict between the requirements of this standard and applicable statutory or regulatory requirements, the
G-14 Americas Aerospace Quality Standards Committee (AAQSC)
Air Quality improvement in air conditioner bus saloon through Carbon activated filters2021-26-031209/22/2021
India being a developing nation, there is significant improvement in road infrastructure across the country as well as the spending power and earnings of the common man. This leads to the new trend of customers become health and comfort conscious and willing to pay more for better and improved transportation. To satisfy these demands, OEM's are developing more numbers of AC buses. Although the OEM's are meeting this demand of quantity, the quality of air from air conditioner is still subpar. One of the main reasons for this poor air quality is because of the ineffectiveness of conventional air conditioner air filters to control particulate materials i.e. PM2.5, biological pollutants i.e microbes, bacteria, viruses, and gaseous pollutants i.e. CO, CO2, SO2, NOX, O3 & VOCs in air. As per various researches, health problems associated with bus occupant compartment air quality appear more frequently. In this paper, research is shown on bus air quality improvement with respect to
Dwivedi, Ajay Kumar, Pahade, Atul, Thakur, Jitendra
Study of Fuel in Oil Dilution Due to Aftertreatment Regeneration in Automotive Diesel Engine2021-26-018409/22/2021
The Bharat Stage VI emission norms in India is driving the use of more complex after treatment systems for diesel engines. The after-treatment system typically includes DOC, DPF and SCR to reduce the engine out hydrocarbon, particulates & NOx respectively. For a durable functioning of the after-treatment system, cleaning of these components at regular intervals is required. One such method is to burn the diesel fuel inside DOC, to clean the DPF and SCR, a process called regeneration. Regeneration involves using extra diesel fuel injected into the exhaust stream, which gets oxidized in the DOC thereby regenerating the DPF or SCR. Present technology uses the existing injectors in the diesel engine for regeneration which is cost effective and simpler compared to the external hydrocarbon dosing system. In-cylinder hydrocarbon dosing is associated with the risk of fuel getting mixed with engine oil. This happens because the regeneration fuel is injected in the exhaust stroke where the
Vinay P, Ashwyn, Verma, Utkarsh, Goswami, Imon, Suresh, Swathy
Bump steer and Brake steer optimization in steering linkages through TAGUCHI method DOE analysis2021-26-007909/22/2021
Due to recent infrastructural development and emerging competitive automotive markets in India, there is seen a huge shift in customer’s demand and vehicle drivability pattern in commercial vehicle industry. Now apart from ensuring better vehicle durability and best in class tyre life and fuel mileage, a vehicle manufacturer also has to focus on other key attributes like driver’s safety and ride comfort. Thus, for ensuring enhanced drivability, key parameters for ensuring better vehicle handling includes optimization of bump steer and brake steer. Both bump steer and brake steer are vehicle’s undesirable phenomenon where a driver is forced to constantly make steering wheel correction in order to safely maneuver the vehicle in the desired path. Since both bump steer and brake steer are caused due to the interactions of several vehicle parameters such as – drop arm and steering arm hard point, suspension stiffness, suspension eye and shackle position, caster angle, draglink length etc
Chopra, Nitin, P, Mahadevan
Mitigation of Engine Sub-system Noise in Two Wheeler Using Crank Angle Domain Analysis2021-26-030609/22/2021
One of the main objective of manufacturer is to achieve high productivity with low cost while increasing the customer satisfaction. With increased competition in the automotive sector the product quality is defined not only from fuel economy and durability perspective but also Noise, Vibration and Harshness (NVH), which plays a vital role in attracting the customers. In two wheeler, engine is dominant noise source and its quality improvement is utmost priority. Now a days, several signal processing and sensing techniques are developed for noise source identification of an engine but precise source identification can be achieved only by advanced analysis technique. This paper focuses on a procedure for noise source identification from engine sub-system viz. valve operation and its generation mechanism using crank angle domain analysis in two wheeler engine. Baseline noise measurements were carried out for critical frequency identification. Further, vibro-acoustic measurements were
Jagdale, Yogeshwar Pundlik, Askhedkar, Amlesh, Arimboor, Kuriyan
Implementation of Lean Operation User ManualJ4001_202109 (Current)09/21/2021
SAE J4001 provides instruction for evaluating levels of compliance to SAE J4000. Component text (Sections 4 to 9) from SAE J4000 is included for convenience during the evaluation process. Applicable definitions and references are contained in SAE J4000. SAE J4000 tests lean implementation within a manufacturing organization and includes those areas of direct overlap with the organization’s suppliers and customers. If applied to each consecutive organizational link, an enterprise level evaluation can be made. SAE J4001 relates the following approximate topic percentages to the implementation process as a whole: SAE J4001 is to be applied on a specific component basis. Each of the 52 components tests part of, one, or multiples of the specific requirements of lean implementation. Implementation throughout an organization may be measured by evaluating all of the components. The level of compliance for each component relative to best practice may be used as a reference by an organization to
Automotive Quality and Process Improvement Committee
Evolution and Future Development of Vehicle Fuel Specification in China2021-01-120109/21/2021
Fuel quality has a significant influence on the combustion engine operation. In recent years the increasing concerns about environmental protection, energy saving, energy security and the requirements of protecting fuel injection and aftertreatment systems have been major driving forces for the Chinese fuel specification evolution. The major property changes in the evolution of Chinese national gasoline and diesel standards are introduced and the reasons behind these changes are analyzed in this paper. The gasoline fuel development from State I to State VI-B involved a decrease of sulfur, manganese, olefins, aromatics and benzene content. The diesel fuel quality improvement from State I to State VI included achieving low sulfur fuels and a cetane number (CN) increase. Provincial fuel standards, stricter than corresponding national standards, were implemented in economically developed areas in the past. Currently only Beijing is still implementing regional standards with national
Guo, Zexian, Liu, Zemin, Shuai, Shijin
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