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Design optimization for Engine mount

Prateek Sharma
VE Commercial Vehicles Ltd-Mahendra Parwal
  • Technical Paper
  • 2019-28-2540
To be published on 2019-11-21 by SAE International in United States
The mounting of an engine plays important role in controlling the vibration transmissibility, alignment of transmission unit within specific limit. Design of any mounting system mainly depends on stiffness, allowed deformation and transmissibility of force, natural frequency and size w.r.t space constraints etc. This paper helps to study the behavior of engine mount with different layer of rubber with defer stiffness. Firstly the design of front engine mount with single rubber layer according to space constraint in vehicle and then analysis is done to determine the deformation and various results using CAE technique. As per the results, design is modified with varying layer of rubber pad and again analysis is done with same boundary condition followed by improved results.
 

REDUCTION OF STEERING VIBRATION WITH THE APPLICATION OF DYNAMIC TESTING AND ANALYSIS

John Deere India Pvt Ltd-amol pimpale, pankaj vaste, rohit pawar
John Deere India Pvt, Ltd.-Prashant Bardia
  • Technical Paper
  • 2019-28-2421
To be published on 2019-11-21 by SAE International in United States
KEYWORDS: Steering System, Engine Vibrations, Dynamics, Modal Testing, Modal Analysis, ABSTRACT - In modern agriculture, the tractor’s use is indispensable and essential for various operations like cultivation, soil preparation, pulverization and many more. However, despite being efficient machines, tractors may be subjected to different level of vibrations in various parts of their structure. The vibration often plays the key cause of invalidation and component failures and also, affecting the ride and comfort. Since it is known that such vibration factors can affect the behavior in many ways, an understanding of their dynamic response is warranted. In this paper, case study related to reduction of steering system vibration is presented. Objective and Background: Vibration reduction is linked with the reduction either at source or on path. For such, it is necessary to know the reality of machines, component and mechanisms to mitigate the vibration levels on the tractor. From the testing and analysis of the components, it is possible to calculate the dynamic properties and vibration average level. The vibration reduction decreases the damages caused by…
 

Development of Systematic Technique for Design of Electric Motor Mounting System in EV/ HEV Application

Automotive Research Association of India-Ravindra Kumar, Mayur Shimpi
  • Technical Paper
  • 2019-28-2508
To be published on 2019-11-21 by SAE International in United States
Last decade has been era of environmental awareness. Various programs have launched for making devices and appliances eco-friendly. This initiative has lead automobile industry toward hybridization and now total electrification of vehicles. Electric motor produce high frequency vibration along with high torque. Hence it needs to be isolated properly & carefully as these vibrations can damage other automobile parts. Dynamic response of electric motor is different from response of IC engines, so use of engine mounting design method is not suitable for designing mounting system for electric motor mounting system. In design of electric motor mounting, position and orientation of elastomeric mounts plays important role. Mounts used in passive vibration isolation are made up of elastomeric material which are stiff and resilient in nature. Ideal positions for elastomeric mounts are found by drawing free body diagrams (FBD) of force distribution on mount due to electric motor at various position in a single plane. Both 4- point and 3- point mounting system are designed and considered for analytical and experimental investigation of force and displacement transmissibility.…
 
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Elastomer Swell Behavior in 1-Propanol, Diisobutylene, Cyclopentanone, and a Furan Mixture Blended in E10 and a Blendstock for Oxygenate Blending (BOB)

SAE International Journal of Fuels and Lubricants

Oak Ridge National Laboratory, USA-Michael D. Kass, Christopher J. Janke, Raynella M. Connatser, Brian West
  • Journal Article
  • 04-12-03-0011
Published 2019-08-21 by SAE International in United States
The compatibility of four potential bio-derived blendstock molecules with infrastructure elastomers was determined by measuring the volume change following exposure. The blendstock molecules included 1-propanol, diisobutylene, cyclopentanone, and a furan mixture. The elastomers included two fluorocarbons, six nitrile rubbers (NBRs), and one each of fluorosilicone, neoprene, polyurethane, and silicone. The elastomers were exposed to the fuel molecules as blends ranging from 0 to 30 vol.% in both a blendstock for oxygenate blending (BOB) formulation and an E10 fuel. Silicone exhibited excessive swelling in each test fuel, while the other elastomers showed good compatibility (low swell) with diisobutylene, 1-propanol, and the furan mixture when BOB was used as the base fuel. The E10 base fuel produced high (>30%) swell in neoprene, polyurethane, and some nitrile rubbers. In most cases diisobutylene produced the least amount of volume expansion. In contrast, the addition of cyclopentanone produced unacceptably high swelling in each elastomer and is not considered suitable for use with these fuels. Analysis of the results showed that the swelling behavior is predominantly due to the polarity of…
 
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Synthetic Rubber, Hot Oil Resistant, High Swell, 45 - 55

AMS CE Elastomers Committee
  • Aerospace Material Specification
  • AMS3222J
  • Current
Published 2019-07-29 by SAE International in United States

This specification covers a synthetic rubber in the form of sheet, strip, tubing, extrusions, and molded shapes. This specification should not be used for molded rings, compression seals, O-ring cords, and molded in place gaskets for aeronautical and aerospace applications without complete consideration of the end use prior to the selection this material.

 
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Rubber: Butyl (IIR), Low Compression Set and Low Moisture/Gas Permeability, 65 to 75 Type A Hardness, for Seals in Desiccated or Other Systems Requiring Resistance to Gas and/or Water Vapor Permeation

AMS CE Elastomers Committee
  • Aerospace Material Specification
  • AMS7601
  • Current
Published 2019-07-18 by SAE International in United States

This specification covers a butyl rubber in the form of molded rings, compression seals, O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications. For sheet, strip, tubing, extrusions, and molded shapes use AMS3941 specification.

 
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Rubber: Butyl (IIR Abbreviation), Phosphate Ester Resistant, 65 to 75 Hardness, for Seals in Hydraulic Systems, etc.

AMS CE Elastomers Committee
  • Aerospace Material Specification
  • AMS7338A
  • Current
Published 2019-07-18 by SAE International in United States

This specification covers a butyl rubber in the form of molded rings, compression seals, o-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications. As AMS3238 is no longer valid for O-rings. For O-rings, the requirements of AMS7338 shall be met wherever AMS3238 is specified.

 
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O-Ring Molded from AMS7287 Material, Metric

A-6C2 Seals Committee
  • Aerospace Standard
  • MA3445A
  • Current
Published 2019-07-10 by SAE International in United States

Scope is unavailable.

 
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O-Ring Molded from AMS7273 Material, Metric

A-6C2 Seals Committee
  • Aerospace Standard
  • MA3434A
  • Current
Published 2019-07-10 by SAE International in United States

Scope is unavailable.

 
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O-Ring Molded from AMS7267 Material, Metric

A-6C2 Seals Committee
  • Aerospace Standard
  • MA3442A
  • Current
Published 2019-07-10 by SAE International in United States

Scope is unavailable.