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Antirodent Corrugated tube Development for Fuel tube Rat bite

Hyundai Motor India Engineering Pvt Ltd.-Gurupackiam Lakshmanaraj
  • Technical Paper
  • 2019-28-2536
To be published on 2019-11-21 by SAE International in United States
Rat damages in automobiles/food crops/house hold things are extensive in India. Cases of Rat damages to Car Fuel tubes (plastic) and subsequent fuel leak problems are increasing in India.To protect the Fuel tube from rat bite , a more robust and easy assemble protection method is discussed. Hence Antirodent corrugated tubes are considered to protect fuel tube from rat bite. Antirodent masterbatch (3% ) were added to the corrugated tubes and lab test were done in CAZRI. Antirodent corrugated tubes tested with 2 different species showed better results compared to standard corrugated tubes
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Spring and damper tuning of an ATV to reducing transmissibility

ARAI Academy-Rajat Girish Kanade, Mohammad Rafiq Agrewale, Kamalkishore Vora
  • Technical Paper
  • 2019-28-2401
To be published on 2019-11-21 by SAE International in United States
The application in vehicle ride and handling has been mostly subjective or intuitive. There are several methods to improve vehicle stability and handling. One of the methods is suspension tuning. The objective of this work is to perform dynamical analysis of suspension by spring and damper tuning to reduce transmissibility for an all-terrain vehicle. A baseline spring rate data is used for tuning to provide better ride. The Fox air shock absorbers with progressive damping are used for testing. First the dynamics simulation is carried out by using ADAMS CAR tool. A detailed characteristic of the air shocks is obtained at various loading conditions by experimentation using test rig. Based on it, the simulation has been carried out for desired tuning parameters of spring and damper to improve stability. The speculated optimum setting is validated on an all-terrain vehicle (ATV) using ultrasonic sensors and accelerometers, by varying vehicle speed and bump heights to evaluate the transmissibility of the suspension. The acquired data shows behaviour of the suspension and the influence of the main parameters in…
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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
To be published on 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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Transient Response Analysis and Synthesis of an FSAE Vehicle using Cornering Compliance

SRM Institute of Science and Technology-Nanthakumar Ajd, Pranav Suresh, Shubham Subhnil, Vasanthkumar CH
  • Technical Paper
  • 2019-28-2400
To be published on 2019-11-21 by SAE International in United States
OBJECTIVE Race vehicles are designed to achieve higher lateral acceleration arising at cornering conditions. A focused study on the steady state handling of the car is essential for the analysis of such conditions. The transient response analysis of the car is also equally important to achieve best driver-car relationship and to quantify handling in the range suitable for a racing car. This research aims to investigate the design parameters responsible for the transient characteristics and optimize those design parameters. This research work examines the time-based analysis of the problem to truly capture the non-linear dynamics. Apart from tires, chassis can be tuned to optimize vehicle handling and hence the response times. METHODOLOGY To start with, the system is modelled with governing parameters and simulation is carried out to set baseline configurations. Steady state and transient handling simulations run independent of each other with independent logic, coded on MATLAB. The static testing of the chassis is carried over using a Kinematic & Compliance (K & C) testing rig to get Compliance Budget and hence the calculated…
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Methodology for failure simulation Using 4 corner 6 DOF Road load simulator of Overhanging Components: An Experimental Approach

Maruti Suzuki India, Ltd.-Naveen Malik, Ayan Bhattacharya, Sahil Jindal, Sayed Zergham Ali Naqvi
  • Technical Paper
  • 2019-28-2404
To be published on 2019-11-21 by SAE International in United States
Nowadays, Road Load Simulators are used by automobile companies to reproduce the accurate and multi axial stresses in test parts to simulate the real loading conditions. The road conditions are simulated in lab by measuring the customer usage data by sensors like Wheel Force transducers, accelerometers, displacement sensors and strain gauges on the vehicle body and suspension parts. The acquired data is simulated in lab condition by generating ‘drive file’ using the response of the above mentioned sensors. For generation of proper drive file, not only good FRF but ensuring stability of inverse FRF is also essential. Stability of the inverse FRF depends upon the simulation channels used. In this paper, an experimental approach was applied for focused failure simulation of engine mount, one of such low correlation zone, with known history of failure. Methodology was established to simulate proving ground loads on engine mount along with simulation of loads at wheel center using a 4 corner 6 DOF road load simulator. Result was verified by endurance run on test rig and matching the nature…
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Requirements for Accreditation of Testing Laboratories for Organic Coatings

AMS G8 Aerospace Organic Coatings Committee
  • Aerospace Standard
  • AS5505A
  • Current
Published 2019-10-28 by SAE International in United States

This document provides interpretation of ISO/IEC 17025 and establishes additional requirements for accreditation of testing laboratories for evaluating organic coatings.

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Wheel and Wheel Trim Weathering Testing for Paint Coatings

Wheel Standards Committee
  • Ground Vehicle Standard
  • J2633_201910
  • Current
Published 2019-10-21 by SAE International in United States
This SAE lab test procedure should be used when performing the following specialized weathering tests for wheels; Florida Exposure, QUV, Xenon and Carbon Weatherometer. In addition to these procedures, some additional post-weathering tests may be specified. Please refer to customer specifications for these requirements.
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Corrosion Test Master Establishment

Wheel Standards Committee
  • Ground Vehicle Standard
  • J2636_201910
  • Current
Published 2019-10-21 by SAE International in United States
This SAE lab recommended practice may be applied to corrosion test methods such as salt spray, filiform, Corrosion creep back, etc. This procedure is intended to permit corrosion testing to be assessed between Laboratories for correlation purposes.
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Systematic Work Flow for Fatigue Life Prediction of Automotive Components

Mahindra & Mahindra, Ltd.-Nitin Kumar Khanna, Baskar Anthonysamy, Krishna Shettipally, Manohar Kalal
Published 2019-10-11 by SAE International in United States
Fatigue life estimation of automotive components is a critical requirement for product design and development. Automotive companies are under tremendous pressure to launch new vehicles within short duration because of customer’s changing preferences. There is a necessity to have a comprehensive virtual simulation and robust validation process to evaluate durability of vehicle as per customer usage. Test track and field test are two of the most time-consuming activities, so there is a need of simulation process to substitute these requirements. This paper summarizes the overall process of Accelerated Durability Test with measured road loads. Based on category of vehicle, type road profiles and the customer usage pattern, the wheel forces, strains and acceleration are measured which is used to derive the equivalent duty cycles on proving ground. The wheel force transducers (WFT) are used to derive loads for fatigue life estimation. A full vehicle model is prepared in ADAMS CAR and validated through Physical testing. The loads on suspension hard points extracted from the validated MBD model. These loads at various hardpoint locations, are used…
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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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