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Ride- Comfort Analysis for Commercial Truck using MATLAB Simulink.

ARAI Academy-Sarnab Debnath
Automotive Research Association of India-Mohammad Rafiq Agrewale
  • Technical Paper
  • 2019-28-2428
To be published on 2019-11-21 by SAE International in United States
Ride Comfort forms a core design aspect for suspension and is to be considered as primary requirement for vehicle performance in terms of drivability and uptime of passenger. Maintaining a balance between ride comfort and handling poses a major challenge to finalize the suspension specifications. The objective of this project it to perform ride- comfort analysis for a commercial truck using MATLAB Simulink. First, benchmarking was carried out on a 4x2 commercial truck and the physical parameters were obtained. Further, a mathematical model is developed using MATLAB Simulink R2015a and acceleration- time data is collected. An experimentation was carried out on the truck at speeds of 20 kmph, 30 kmph, 40 kmph and 50 kmph over a single hump to obtain actual acceleration time domain data. The model is then correlated with actual test over a single hump. This is followed by running the vehicle on Class A, B & C road profiles to account for random vibrations. Similarly, a simulation is done on MATLAB Simulink and a correlation is established between simulated and actual…
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Multi body dynamic simulation of tyre traction trailer

International Centre for Automotive Technology-Gopal Singh Rathore
  • Technical Paper
  • 2019-28-2430
To be published on 2019-11-21 by SAE International in United States
Tyre Traction Trailer is a device designed to find the Peak Brake co-efficient of C2 and C3 tyre as per ECE R117. The trailer is towed by the truck and is braked suddenly to evaluate braking co-efficient of specimen tyre. It is a single wheel trailer equipped with load cell to capture tire loads (Normal and longitudinal)while braking. Traction Trailer is modelled in MSC Adams and rigid body simulation is carried out for static stability of the system. Dynamic simulations were performed to understand locking of wheels during braking. Body frame was further modelled as flex body to perform structural analysis of the frame. The paper contains stress and deformation plots of trailer Structure under various loading conditions, change in Centre of gravity, weight transfer and forces on springs during braking and cornering, plots of tractive and normal load on tyre during braking.
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A novel approach on range prediction of a hydrogen fuel cell electric truck

VE Commercial Vehicles, Ltd.-C Venkatesh Chandrasekar, L R Amruth Kumar
  • Technical Paper
  • 2019-28-2514
To be published on 2019-11-21 by SAE International in United States
A novel approach on range prediction of a hydrogen fuel cell electric truck C.Venkatesh - Manager - Product Development, Sustainable Mobility & Advanced Technologies Abstract: A novel approach on range prediction of a hydrogen fuel cell electric vehicle Abstract: Today's growing commercial vehicle population creates a demand for fossil fuel surplus requirement and develops highly polluted urban cities in the world. Hence addressing both factors are very much essential. Battery electric vehicles are with limited vehicle range and higher charging time. So it is not suitable for the long-haul application. Hence the hydrogen fuel cell based electric vehicles are the future of the commercial electric vehicle to achieve long range, zero emission and alternate for reducing fossil fuels requirement. The hydrogen fuel-cell electric vehicle range, it means the total distance covered by the vehicle in a single filling of hydrogen into the onboard cylinders. And here the prediction of the driving range is essential based on optimal parameters (vehicle acceleration, speed, trip time etc.) before the start of the trip. If the driver starts the…
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Parking Brake Drawbar Pull Test Procedure - Truck and Bus

Truck and Bus Brake Systems Committee
  • Ground Vehicle Standard
  • J1729_201910
  • Current
Published 2019-10-17 by SAE International in United States

This SAE Recommended Practice provides a test method and instructions for measuring performance of parking brakes on air- or hydraulic-braked vehicles equipped with in-wheel or drive-line parking brakes. This procedure applies to truck tractors, trailers, trucks, and buses.

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Transformational Technologies Reshaping Transportation - An Academia Perspective

Ohio State University-Giorgio Rizzoni, Qadeer Ahmed, Mukilan Arasu, Pradeep Sharma Oruganti
Published 2019-10-14 by SAE International in United States
This paper and the associated lecture present an overview of technology trends and of market and business opportunities created by technology, as well as of the challenges posed by environmental and economic considerations. Commercial vehicles are one of the engines of our economy. Moving goods and people efficiently and economically is a key to continued industrial development and to strong employment. Trucks are responsible for nearly 70% of the movement of goods in the USA (by value) and represent approximately 300 billion of the 3.21 trillion annual vehicle miles travelled by all vehicles in the USA while public transit enables mobility and access to jobs for millions of people, with over 10 billion trips annually in the USA creating and sustaining employment opportunities.Commercial vehicles provide access to work and leisure time for millions of people every day and deliver and distribute the goods that make our economy move, from raw materials, to components, to finish products, as well as providing a multitude of services and support functions. While on-road trucks and buses represent only part…
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Smart 24 V Battery Switch for a Reliable Redundant Power Supply in Commercial, Construction, and Agriculture Vehicles (CAV)

Infineon Technologies AG-Vincent Usseglio, Andre Mourrier
Published 2019-10-11 by SAE International in United States
For highly automated driving, commercial vehicles require an Electric/Electronic (E/E) architecture, which - in addition to sensor fusion - ensures safety-critical processes such as steering and braking at all times. Among other things, a redundant 24 V supply with corresponding disconnection is required. The battery switch is a key component. Commercial, construction, and agricultural vehicles (CAV) need to operate at the highest possible availability and the lowest possible cost of ownership. This is why automated and autonomous driving has the potential to revolutionize the CAV sector. Driverless machines can be operated around the clock and almost non-stop. Platooning allows automated, interconnected trucks to drive in a convoy and very close to each other. Platooning saves fuel. The North American Council for Freight Efficiency has calculated the following:In a scenario with two virtually connected trucks, the fuel consumption of the front vehicle is reduced by 4.5%, and by 10% in the rear vehicle, due to reduced aerodynamic drag on all of the vehicles.In a scenario with three connected trucks, platooning even leads to an average savings…
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Attenuation of Aeroacoustic Noise of a Typical Van Using Passive Devices through CFD Simulation

SRM Institute of Science and Technology-Sundararaj Senthilkumar, Budda Thiagarajan Kannan
Vel Tech Institute of Science and Technology-Mukundan Manikandan
Published 2019-10-11 by SAE International in United States
The present numerical analysis aims at studying the effect of changes in profile of van on aero-acoustic noise and aerodynamic drag. The numerical analysis is carried out using commercial CFD software, ANSYS Fluent, with k-epsilon & Large Eddy Simulation turbulence models. In present study five models of truck are analysed, including baseline model at different Reynolds numbers, namely 0.391, 0.415 and 0.457 million. In order to reduce the aero-acoustic noise, various profile modifications have been adapted on existing van model by adding a top and bottom diffuser at the rear of the truck. The comparison has been done with respect to coefficient of drag, coefficient of pressure, pressure contours for all four cases. It is observed from the simulation results among different modifications of truck, adding a top and bottom diffuser of 15 degrees at the rear end of truck gives the maximum reduction in aero-acoustic noise up to 9.4% and aerodynamic drag reduction of 3.8 % as compared to baseline model, at a speed of 81 km/h.
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Antilock Brake Systems Energy Consumption Test Procedure for Air-Brake-Equipped Truck Tractors, Buses, Trailers, and Dollies

Truck and Bus Brake Systems Committee
  • Ground Vehicle Standard
  • J2255_201910
  • Current
Published 2019-10-07 by SAE International in United States

This SAE Recommended Practice provides instructions and test procedures for measuring air consumption of air braked vehicles equipped with Antilock Brake Systems (ABS) used on highways.

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ERRATUM

Université de Lyon-Charlotte Fossier, Christophe Changenet, Fabrice Ville
Volvo Group-Denis Barday, Vincent Berier
  • Journal Article
  • 03-11-01-0004.1
Published 2019-10-07
No Abstract Available.
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EDITORIAL: Word on the street at COMVEC

SAE Truck & Off-Highway Engineering: October 2019

Editor-in-Chief-Ryan Gehm
  • Magazine Article
  • 19TOFHP10_06
Published 2019-10-01 by SAE International in United States

Last month's SAE COMVEC technical conference in Indianapolis welcomed many high-level engineering leaders who spoke to show-goers about a range of important topics impacting on- and off-highway vehicles.

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