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Mold in Color Diamond White ASA Material for Automotive Exterior Application

Mahindra & Mahindra, Ltd.-Karthik Govindaraj, K V Balaji, Murukesan Vimalathithan, Gandhi Samir, Ladhe Rajesh
  • Technical Paper
  • 2019-28-2562
Published 2019-11-21 by SAE International in United States
In this paper, mold in color diamond white ASA material has been explored for front bumper grill, fender arch extension, claddings and hinge cover applications. Other than aesthetic requirements, these parts have precise fitment requirement under sun load condition in real world usage profile. Structural durability of the design was validated by virtual engineering. Part design and material combinations with better tooling design iterations were analyzed by using mold flow analysis. Complete product performances were validated for predefined key test metrics such as structural durability, thermal aging, cold impact, scratch resistance, and weathering criteria. This part met required specification. This mold in color ASA material-based parts has various benefits such as environmentally friendly manufacturing by eliminating environmental issues of coating, easily recycled, and faster part production because intended color achieved in one step during molding. Also, it lowers overall production energy footprint, less scrap with no secondary painting, and lower final part cost by eliminating secondary operations.
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High Durable PU Metallic Monocoat System for Tractor Sheet Metal Application

Mahindra & Mahindra, Ltd.-Rahul Lalwani, Sudhir Sawant, Yogesh keskar, Nitin Pagar
Mahindra Research Valley-Vinay Kumar
  • Technical Paper
  • 2019-28-2541
Published 2019-11-21 by SAE International in United States
In sheet metal painting for various applications like tractor and automobiles, most attractive coating is metallic paints. It is widely applied using 3 coat 2 bake or 3 coat 1 bake technology. Both options, results in high energy consumption, higher production through put time and lower productivity in manufacturing process. During various brainstorming and sustainability initiatives, paint application process was identified to reduce burden on environment and save energy. Various other industry benchmarking and field performance requirement studies helped to identify critical quality parameters. There was collaboration with supplier to develop monocoat system without compromising any performance and aesthetic properties. This resulted in achieving better productivity, elimination of two paint layers, substantial reduction in volatile organic content, elimination of one baking cycle and energy saving.Metallic mono-coat formulated using strong polyurethane resins and latest technology pre-coated aluminum pigment for achieving metallic effect in finish. With new resin technology, further reduction in baking temperature and energy is possible.
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Realtime Tuning and optimization of EV traction motors with controllers on E-motor testbench

ARAI Academy-Manoj Desai
Automotive Research Association of India-Monishram Venkataram
  • Technical Paper
  • 2019-28-2478
Published 2019-11-21 by SAE International in United States
The need for dedicated development of indigenous electric power-train is becoming much essential in the recent times with upcoming trends and policies. Hence, The validation and optimization of the newly developed electric power-train becomes much crucial in order to ensure smooth real world operation. This can be only possible in E-motor test benches with dedicated equipment for thorough evaluation. Also, there are no practical limitations to check the peak characteristics in a controlled laboratory environment. Initially, the motor is setup by mechanically coupling with the dynamo-meter and the controller in the open loop method with constant parameters to check steady state operability without load or external parameters that affect the torque production and speed of the drive. Then progresses to closed loop method incorporating the feedback control and external parameters including torque loading at the shaft from the dynamo-meter. The output torque is primarily estimated from phase currents and forms as the feedback to alter the input to the drives. In closed loop control, the electric power train is run with either speed control or…
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Acrylonitrile Butadiene (NBR) Rubber Aromatic Fuel Resistant 65 - 75

AMS CE Elastomers Committee
  • Aerospace Material Specification
  • AMS3215N
  • Current
Published 2019-11-05 by SAE International in United States
This specification covers a nitrile (NBR) rubber in the form of sheet, strip, tubing, extrusions, and molded shapes.
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Titanium Alloy Welding Wire 5Al - 2.5Sn

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS4953H
  • Current
Published 2019-11-05 by SAE International in United States
This specification covers a titanium alloy in the form of welding wire.
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ACeDrive consortium plans more-efficient EV powertrain

Automotive Engineering: November/December 2019

Stuart Birch
  • Magazine Article
  • 19AUTP11_03
Published 2019-11-01 by SAE International in United States

Led by GKN, the ACeDrive consortium is developing lighter and more-efficient EV propulsion, targeting volume production in 2023.

It's called ACeDrive, which may sound innocuous for an auto-industry project. But the consortium that formed it has announced that it seeks to develop the world's lightest and most efficient volume electric vehicle (EV) powertrain. Involving two major suppliers, a research university and the UK government-backed Advanced Propulsion Centre (APC), the aggressive targets for the ACeDrive (Advanced Cooling and Control of high speed e-Drive) include a 25% reduction in cost, a 25% reduction in packaging size and a 20% reduction in weight combined to deliver a 10% increase in efficiency.

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SUPPLIER EYE

Automotive Engineering: November/December 2019

  • Magazine Article
  • 19AUTP11_07
Published 2019-11-01 by SAE International in United States

The automotive industry has reached a strategic inflection point, where significant structural change is driving greater levels of instability on one hand, and opportunity (for some) on the other. That's the conclusion I'm hearing in discussions with suppliers and OEMs.

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Mahle reveals modular, scalable integrated hybrid powertrain

Automotive Engineering: November/December 2019

Stuart Birch
  • Magazine Article
  • 19AUTP11_10
Published 2019-11-01 by SAE International in United States

Mahle is developing a complete “fits all, off-the-shelf” modular hybrid-drive propulsion system for a wide range of automakers' models, designed to cut costs, improve packaging and provide a level of electrified-vehicle commonality not seen before in the auto industry.

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Chevy reveals 2020 Corvette Stingray convertible, C8.R racer

Automotive Engineering: November/December 2019

Bill Visnic
  • Magazine Article
  • 19AUTP11_14
Published 2019-11-01 by SAE International in United States

Reinforcing the Corvette's long association with astronauts, Chevrolet unveiled the convertible version of its all-new, mid-engine-layout 2020 Corvette Stingray in Cape Canaveral in early October. Executive chief engineer Tadge Juechter, underscoring the car's no-compromises performance and comparatively affordable price, called it a “no-lose proposition” for enthusiasts considering the new Corvette but also desiring a more open-top experience. When it goes into production in the first quarter of 2020, the Corvette Stingray convertible will start at $67,495 - $7,500 more than the 2020 Stingray coupe, which was widely celebrated for its aggressive $59,995 base price.

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A Method for Improvement in Data Quality of Heat Release Metrics Utilizing Dynamic Calculation of Cylinder Compression Ratio

SAE International Journal of Engines

Kistler AG, Switzerland-Mario Nahkle, David R. Rogers, Janko Meier
University of Stuttgart, Germany-Hubert Fusshoeller, Michael Bargende
  • Journal Article
  • 03-13-02-0010
Published 2019-10-29 by SAE International in United States
One of the key factors for accurate mass fraction burned and energy conversion point calculations is the accuracy of the compression ratio. The method presented in this article suggests a workflow that can be applied to determine or correct the compression ratio estimated geometrically or measured using liquid displacement. It is derived using the observation that, in a motored engine, the heat losses are symmetrical about a certain crank angle, which allows for the derivation of an expression for the clearance volume [1]. In this article, a workflow is implemented in real time, in a current production engine indicating system. The goal is to improve measurement data quality and stability for the energy conversion points calculated during measurement procedures. Experimental and simulation data is presented to highlight the benefits and improvement that can be achieved, especially at the start of combustion. The method calculated a compression ratio correction of 0.3 and 0.25 on two different gasoline engines, respectively. At 2000 rpm a deviation in the 5% and 10% energy conversion angles (CA05 and CA10) of…
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