Your Selections

Show Only


File Formats

Content Types











Amelioration of modular mobility by adopting split cell solar panel cleaning and cooling therof

Sri Krishna College of Engg. and Tech.-Soundararajan Ranganathan, Ajith Raja, Arunpragash Mohana Sundaram, Ashwanth Pranav Selvamani
  • Technical Paper
  • 2019-28-0078
To be published on 2019-10-11 by SAE International in United States
In photovoltaic system the efficiency of solar cells is determined in combination with latitude and climate. The electricity generation in photovoltaic cell is more in the morning time than in the afternoon time. This is due to the fact that an increase in solar cell temperature leads to a decrease in efficiency of the solar panel. This work aims to provide necessary cooling to the solar panel for favourable output during noon time. Normally electrical modular vehicles use non-split cell solar panels. In order to increase the efficiency, we are using split cell solar panel as it increases voltage by halving the size of the silicon chips. Thus, halving the cells results in increasing efficiency and lowering the operation temperature. The solar panel should be maintained at a particular temperature by adopting sprinkling of water method in solar panel for hybrid vehicles. The proposed system consists of storage tank, temperature sensor, water sprinkle jets attached to the hybrid vehicle. When the temperature increases beyond the limit, the temperature sensor provides signal to the water jets…

Aerodynamic Drag Reduction of a Intercity Bus through surface modifications- A Numerical Simulation

Mahindra & Mahindra, Ltd.-Mathialagan Velshankar
SRM Institute of Science and Technology-Sundararaj Senthilkumar, Budda Thiagarajan Kannan
  • Technical Paper
  • 2019-28-0045
To be published on 2019-10-11 by SAE International in United States
The maximum power produced by the Engine is utilized in overcoming the Aerodynamic resistance while the remaining has been used to overcome rolling and climbing resistance. Increasing emission and performance demands paves way for advanced technologies to improve fuel efficiency. One such way of increasing the fuel efficiency is to reduce the aerodynamic drag of the vehicle. Buses emerged as the common choice of transport for people in India. By improving the aerodynamic drag of the Buses the diesel consumption of a vehicle can be reduced by nearly about 10% without any upgradation of the existing engine. Though 60 to 70 % of pressure loads act on the frontal surface area of the buses, the most common techniques of reducing the drag in buses includes streamlining of the surfaces, minimizing underbody losses, reduced frontal area, pressure difference between the front & rear area and minimizing of flow separation & wake regions. As city buses won't have cargo storage constraints roof optimization can be done to reduce the drag coefficient value. A base model of the…

Analytical Model for Calibration Results Performances Enhancement, Resulting in Automated Prescription for Equipments

Airbus-Juan Manuel García Lasanta, Damian Mendez-Huelva
SAICA SL-Jose Enrique Garofano
  • Technical Paper
  • 2019-01-1878
To be published on 2019-09-16 by SAE International in United States
The current aeronautical manufacturing sector is characterized by the high level of competence and the required requirement in its production processes, based on the objectives of profitability and safety (airworthiness). In recent years, there is a real revolution in the sector, where the most advanced tools for the organization and optimization of production are given priority, supported by the latest massively used techniques of automatic data collection. , their organized storage and their analytical classification. Metrology plays a key role in ensuring the quality and reliability of the information generated in these productive cycles. The provision of an analytical model of flexible measurement systems, capable and easily adaptable to the dynamics of the company, is presented as one of the pillars in which this new conception of production is based. The provision of an analytical model of flexible measurement systems, capable and easily adaptable to the dynamics of the company, is presented as one of the pillars in which this new conception of production is based. At the Airbus plant in Puerto Real, and in…

Development of an Accelerated Test for Tire Flat-Spotting

NissanTechnical Center North America-Farokh Kavarana, Scott Fritz
Published 2019-06-05 by SAE International in United States
Tire flat-spotting occurs when tires remain in a loaded condition without rolling for an extended period of time, and can be temporary or permanent depending on the length of storage, vehicle loading and environmental factors. Tire non-uniformity caused from flat-spots often induce shake and shimmy vibration in vehicles due to increased tire-wheel force variation input into the chassis. This results in increased warranty costs for OEMs and tire suppliers and customer dis-satisfaction in third-party quality surveys such as J. D. Power IQS. Flat-spotting is of particular concern for slow-moving vehicle inventory parked for long periods at plants and/or dealership lots.OEMs often stipulate or recommend inventory storage practices for dealers that require physical movement of vehicles at some set duration to reduce the risk of tires developing permanent flat-spots. OEMs also provide component level flat-spotting requirements to tire manufacturers during sourcing and specification timing to secure their internal requirements and targets. The study in this paper initially determined real-world flat-spotting levels on an actual vehicle during the adverse summer months of Arizona. Tire uniformity measured on…
Annotation icon

The Adaptive Cycle Engine on Standard Duty Cycles

Illinois Institute of Technology-Francisco Ruiz
Published 2019-04-02 by SAE International in United States
Continuing research introduced at the 2018 WCX conference, this paper shows the result of simulations where a midsize sedan (1700 kg) fitted with an adaptive cycle engine and a CVT is operated over three standard duty cycles: US06, UDDS, and HWFET, and compared with the results obtained from other engine cycles installed on the same vehicle. Four different engine cycles are compared: conventional 4-stroke, 6-stroke cycle with no air storage, 6-stroke cycle with air storage, and fully adaptive cycle with air storage and a number of strokes determined by instantaneous demand and state of charge of the storage tank. Results show that the fully adaptive engine achieves a better mileage in all scenarios, closely followed by the partially adaptive 6-stroke cycle with storage. Gains over a conventional 4-stroke powerplant range from 3.4 mpg on the HWFET cycle, to 7.6 mpg on the UDDS cycle. Furthermore, air storage allows the adaptive cycle engine to be considerably downsized while still being able to supply sufficient power even on the demanding US06 cycle, resulting in mileage figures over…
Datasets icon
Annotation icon

Development of the Next Generation Flexible Tooling System

Larry Kirby, Ronald Weddle
Published 2019-03-19 by SAE International in United States
Flexible Tooling Systems have been developed as a reconfigurable part support system to enable trimming of multiple part geometries utilizing a single router or waterjet. The driver for this development has been improved part quality, elimination of ergonomic issues associated with manually trimming, and the elimination of cost for part number specific hard tooling and the associated cost for manufacturing, maintenance, and storage. This paper will briefly trace the evolution of aerospace parts trimming history. The remainder of the report will focus on the technical objectives associated with the development of the Next Generation Flexible Tooling System, how they were achieved including the process for validation of each support location in aircraft coordinates. This system is designed to increase part holding accuracy with specific support location validation, and significantly reduce system maintenance costs in wet or dry environments.
Annotation icon

Sublimable Propellant Source for Iodine-Fed Ion Propulsion System

  • Magazine Article
  • TBMG-33932
Published 2019-03-01 by Tech Briefs Media Group in United States

NASA Marshall has developed a system for generating iodine vapor from solid iodine for use as a propellant in a Hall or ion thruster propulsion system. Xenon has generally been the preferred propellant for these spacecraft ion propulsion systems but more recently, iodine-based systems have gained significant attention due to comparable performance to xenon, and the system-level advantages of low storage pressure and higher storage density with more propellant per unit volume.


Pilot-Assisted Check Valve for Low-Pressure Applications

  • Magazine Article
  • TBMG-33621
Published 2019-01-01 by Tech Briefs Media Group in United States

Check valves are traditionally designed as a simple poppet/spring system where the spring is designed to equal the force created from the sealing area of the valve seat multiplied by the cracking pressure. Since the valve seat diameter in these types of valves is relatively small (less than 0.5” diameter), a low cracking pressure required for back pressure relief devices results in a low spring preload. When sealing in the reverse direction, the typical 20 psid storage pressure of the cryogenic fluid is not enough pressure force to provide adequate sealing stress.


Method for Assessing the Cleanliness Level of New Hydraulic Fluid

CTTC C1, Hydraulic Systems
  • Ground Vehicle Standard
  • J1277_201810
  • Current
Published 2018-10-04 by SAE International in United States
To provide a method by which to assess the cleanliness of new hydraulic fluids. The method is applicable to new mineral and synthetic hydraulic fluids - regardless of packaging. This SAE Standard is not intended as a procedure for operating equipment.
Datasets icon
Annotation icon


E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • MA3454B
  • Current
Published 2018-09-17 by SAE International in United States
No Abstract Available.
Annotation icon