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Design optimization for Engine mount

Prateek Sharma
VE Commercial Vehicles, Ltd.-Mahendra Parwal
  • Technical Paper
  • 2019-28-2540
Published 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.
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AUTOMOTIVE VEHICLE TRANSMISSION SYSTEMS

Academic Center-Nitin Kumar Waghmare
  • Technical Paper
  • 2019-28-2521
Published 2019-11-21 by SAE International in United States
Abstract:At present there are a few types of transmission system available in automated industry, there might some variation in transmission system but the basic working and principle is still the same. Many big automotive manufacturers use different technologies in their transmission system but they still use the same basic principle in their transmission systems. This new technology which is brought by Koenigsegg has changed the way people think about transmission system. This new transmission system is known as Koenigsegg Direct Drive and is currently used by one automotive manufacturer and in one vehicle only, but it soon might change the way it is now.
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Design & Development of Advanced 48 V Electrified Powertrain for Meeting Future CO2 Emission Requirements

Mercedes-Benz R&D India Pvt Ltd.-Chandrakant Palve, Pushkaraj Tilak
  • Technical Paper
  • 2019-28-2487
Published 2019-11-21 by SAE International in United States
Environmental Protection Agency (EPA) study indicates that a typical passenger vehicle emits about 4.6 metric tons of carbon dioxide per year. ICCT (International Council on Clean Transportation) establishing fleet-average emissions targets of 95 g & 175 g CO2 per kilometer for passenger cars & light commercial vehicles respectively. In view of the same, extensive work has been executed for implementation of 48 V electrified drivetrain technology, which plays an important role to meet stringent CO2 emission norms. A 3-phase permeant magnet Electric Motor and associated inverter, including the Packaging of the battery, for a P3 hybrid rear drive vehicle was developed. The requirements, relating to design of 48 V drivetrain technology, power and duty cycle has been extensively addressed in the paper. The Objective of paper to propose low cost, lightweight & compact solution to Global Automotive industry, which will play an important role to mitigate stringent CO2 emission norms defined by EPA agency. The permanent magnet compact size Electric motor having rated capacity of 28 kW & torque of 74 Nm supplied by a…
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Investigation of Transmissibility of an all-terrain vehicle with spring and damper tuning.

ARAI Academy-Rajat Girish Kanade, Mohammad Rafiq Agrewale, Kamalkishore Vora
  • Technical Paper
  • 2019-28-2423
Published 2019-11-21 by SAE International in United States
The application in ride and handling development has been mostly subjective or intuitive. Suspension settings are based on the opinions of experts. The product of this research will enable to quantify the performance of a suspension in terms of its ability to minimize the transmission of road irregularities to the chassis and achieve good mechanical grip with the road surface. This work presents a dynamical analysis of the transmissibility of an off-road vehicle suspension, developed in VIT Vellore for Baja SAE India competition. A baseline spring rates curve for ride is developed to provide a solid foundation to tune from. The shock absorbers used for testing are Fox Float Evol R air shock absorbers with progressive damping. A thorough data acquisition of the force curves for shocks from a test rig is done. A detailed characteristic of the air shocks is obtained at various loading conditions. The basic damping curve is modified towards the desired ideal nature with the data obtained. The speculated optimum setting is validated on the ATV vehicle with ultrasonic sensors and…
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Equivalent Radiated Power driven optimization for driveline housings using simulation tools to cut-down the project time

VE Commercial Vehicles, Ltd.-Suresh Kumar Kandreegula, Hemant Nishad, Dheeraj Singh, Kunal Kamal
  • Technical Paper
  • 2019-28-2533
Published 2019-11-21 by SAE International in United States
In the field of Automotive industry, being competitive makes you succeed. Industry is moving towards advancement day by day. New technologies to improve fuel efficiency, crash resistance, vehicle noise levels have been trending. At VECV, we have traditionally worked on CAE of driveline housings (clutch housing & transmission housing) based on static, dynamic and transient loadings. Currently, weight optimization technique depends on the structural and dynamic loading conditions, but do not consider acoustic concerns. Powertrain housings are highly prone to vibrations and leads to high level of noise. Noise has been constant issue in the casting components associated to driveline. There have been lot of research going on to reduce the level of noise and vibrations in the vehicle driveline, which ultimately leads to fuel efficiency and ergonomic benefits. Low noise generation can also lead to saving of lot of resources deployed to dampen the noises. In order to capture the acoustic responses of the system and to improve the design based on acoustic responses, a comprehensive analysis of newly developed driveline housings (clutch housing…
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Miniaturized and sleek protective device

Mahindra & Mahindra, Ltd.-Priyanka Marudhavanan
  • Technical Paper
  • 2019-28-2535
Published 2019-11-21 by SAE International in United States
A miniaturized and sleek protective device M. Priyanka, Mahindra&Mahindra, India D. Boobala Krishnan*, Mahindra&Mahindra, India T.Vijayan, Mahindra& Mahindra, India Keywords-Fuse, Lightweight. Research and/or Engineering Questions/Objective: Now-a-days there is lot of advancement coming in automobiles. Earlier the electronics were used in engine and engine compartment areas. Now all hydraulics and transmission have been operated by electronics. The role of electronics like sensors, actuators increasing day by day for lifting and moving operations. With increase in electronics circuit, there is complex in wiring harness and packaging space for fuse box is premium Limitations: Limitations of placing other devices. Occupy more space and weight in the vehicle. Packing constraint due to vibration and thermal management issues. Methodology: Two different fuse of same rating can be given in one fuse and we can reduce the wire size. By this method we can save many fuses and reduce the fuse box size. An optimized fuse box minimizes the length of circuit. It translates the system into less plastics. This type of system is highly useful in systems such as ECU…
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Design and Analysis of Hydrostatic Transmission (HST) system for OFF-Highway vehicle

ARAI Academy-Rakesh Vilasrao Mulik, Ramdasi Sushil S, Neelkanth V Marathe
RIT-Siddhant Jadhav, Sanjaykumar Gawade
  • Technical Paper
  • 2019-28-2453
Published 2019-11-21 by SAE International in United States
The development of any country depends on capital energy consumption. Due to technological advancements, people want more comfort and performance with the tractors and at the same time less fatigue and reduced fuel consumption. At present, most of the tractors uses conventional Manual Transmission (MT) as main driveline, though there is research going on, with implementation in few cases, for shifting from conventional MT to advanced transmissions. A Continuously Variable Transmission (CVT) provides Step Lesley an infinite number of effective gear ratios between maximum to minimum value. Hydrostatic Transmission (HST) is one of the types of CVT. HST can improve the fuel efficiency and smooth drivability than a MT without compromising vehicle performance. The development of HST in tractor is less costly as several existing components such as clutch, large number of gears in transmission system can be removed along with reducing of driver fatigue. HST has the ability to adjust engine speed at the point of maximum fuel efficiency for given speed and power requirement. HST includes the combination of at least one hydrostatic…
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Hybrid Transmission for Optimizing Input Machine Operation

SAE International Journal of Alternative Powertrains

University of Split, Croatia-Damir Jelaska, Milan Perkušić, Srdjan Podrug, Vjekoslav Tvrdić
  • Journal Article
  • 08-08-02-0008
Published 2019-11-14 by SAE International in United States
The hybrid transmission with a single energy source is presented in this article, which has the ability to, under certain constraints, transfer the energy from the input shaft with arbitrary variable speed onto the output shaft with the variable speed required for an output machine or propelling member operation - without a control system. The transmission is in a way similar to a power-split transmission for HEVs, but without a driving battery and control system. By adding the control system, the optimal run of the input machine is enabled. As an example, the transmission is designed for a passenger automobile. For the chosen automobile type, the power train is modeled in MATLAB/Simulink. In drive simulations during the single New European Driving Cycle (NEDC), the powertrain efficiency and fuel consumption are obtained and compared with two comparable vehicles: the conventional one and the advanced HEV. The competitiveness of the proposed transmission is proven.
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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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Damage Matching Criterion for Development of Accelerated Duty Cycle from Road Load Data, and Achieving Right Duty Cycle to Determine Gear and Bearing Durability

Romax Solutions-Amol Korde
Published 2019-10-11 by SAE International in United States
While designing the transmission, designer needs to have a duty cycle which is a set of load cases against which he wants to confirm the durability of the same. This is done through data acquisition by running a vehicle on various terrains and converting those data points to a concise set of load cases which we term as duty cycle. This concise set of load cases required because data acquired has millions of data points giving value of torque and RPM at every millisecond which cannot be directly used to assess the fatigue durability of gears and bearings. Converting these millions of road load data points into fewer number of load cases is always a challenge. For a transmission designer, it is being a major hurdle to determine as what is the scientific way of converting these millions of data points into a concise duty cycle. The road load data is taken for few hundred or few thousand kilometres covering enough types of terrains on which vehicle is expected to run. The methods available with…
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