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Viewing 1 to 30 of 10739
2017-01-10
Technical Paper
2017-26-0340
Sarang Bire, Prashant R Pawar, M Saraf
Air suspension systems been used specially in buses and trucks since the 1950s. Now a days these systems are used as a standard fitment and widely used to improve the ride comfort, handling stability and also serves as a medium for better cargo protection, with its feasibility of adjusting height and spring pressure according to the driving conditions and loading scenario as per driver's intent. These system are very well developed for Trucks and buses and have feasibility for adapting for wide range of configuration of suspension system and axle. At same time development of air suspension system for different category of vehicle other than this such as SUV or pickup trucks is not accelerated to extent expected. This work describe realistic approach for development of air suspension for pickup category of vehicle which takes into consideration integrated approach of on road testing and virtual MBD tools.
2017-01-10
Technical Paper
2017-26-0344
Kartheek Nedunuri, Vivekanand Patnaik, Santosh Lalasure, K. Rajakumar, Rajiv Modi
A 4 wheeled vehicle with X-split brake configuration, in hydraulic circuit failed condition will have a behavior of induced sway due to braking force variation in the front and rear. This paper proposes a novel approach & methodology to predict the effect of brake force distribution variation on the vehicle swaying behavior during circuit failed braking condition. This Study will quantify vehicle sway, caused due to imbalance in brake force distribution during a circuit failed braking event on X Split configuration vehicles. It briefly discusses on a case study about most feasible solution to reduce the vehicle sway by altering the brake force distribution in circuit failed condition alone, without having any change in brake force distribution during service brake condition. It also provides a positive correlation & confirmation through actual vehicle testing.
2016-11-30
WIP Standard
J1706
This SAE Recommended Practice is intended to provide basic recommended practices for aid in the development and use of safe and efficient practices for all operations involving the production, handling, and dispensing of SAE J1703 Motor Vehicle Brake Fluids and SAE J1704 Borate Ester Based Brake Fluids.
CURRENT
2016-11-21
Standard
J1102_201611
This SAE Standard covers the chemical, metallurgical and mechanical requirements for two types of passenger car and truck wheel bolts, as follows: (a) Nonserrated shank bolts which are heat treated and (b) Serrated shank bolts which are case hardened.
2016-11-18
WIP Standard
AIRA5C1116
This is a blank form that customers can download in order to record pertinent data after a tire incident using a standardized method.
CURRENT
2016-11-18
Standard
J1102M_201611
This SAE Standard covers the chemical, metallurgical, and mechanical requirements for two types of passenger car and truck wheel bolts, as follows: a. Nonserrated shank bolts which are heat treated b. Serrated shank bolts which are case hardened
CURRENT
2016-11-18
Standard
J2828_201611
This SAE Informational report applies to tires used on off-road, rubber-tired work machines as identified in SAE J1116. This SAE document provides general guidelines for proper handling of potential and actual off-road tire fires and possible related explosions.
2016-11-16
Article
BWI is developing what it believes will be a cost-effective system that would improve ride quality at lower cost than employing magneto-rheological (MR) suspension units.
2016-11-16
Magazine
Focus on advanced safety systems and human-factor interventions The impact of REACH on the aviation sector Considered the most comprehensive chemical-regulation legislation to date, REACH presents serious ramifications for the aircraft industry. Lightweighting: What's Next? Experts weigh in on the challenges and future enablers in the battle to reduce vehicle mass. The best of COMVEC 2016 Autonomous vehicles and improved fuel efficiency via advanced powertrain solutions are pressing topics detailed in this select group of technical papers from the SAE Commercial Vehicle Engineering Congress. Optimizing waste heat recovery for long-haul trucks Autonomous solutions in agriculture Downsizing a HD diesel engine for off-highway applications Zero-emissions electric aircraft: Theory vs. reality
2016-11-16
WIP Standard
J2707
This SAE Recommended Practice specifies a dynamometer test procedure to be used for the measurement of automotive service brake linings and disc brake pads wear. Special motor vehicles and motorcycles are excluded from the application. Trailers with nominal Gross Combination Weight Rating exceeding 40 tons are also excluded from this Recommended Practice.
2016-11-15
Article
Hyliion's electric-drive system hybridizes the trailer portion of the tractor-trailer combination and uses regenerative braking to capture power, possibly saving the trucking industry billions in fuel costs. The company recently won the grand prize in the 2016 "Create the Future" Design Contest for the technology.
CURRENT
2016-11-10
Standard
J2318_201611
This procedure provides test performance requirements for service, spring applied parking, and double diaphragm combination air brake actuators with respect to durability, function, and environmental performance when tested in accordance to SAE J1469.
2016-11-08
Technical Paper
2016-32-0025
Govardan Daggupati, Bapanna Dora Karedla, Chandan Bansilal Chavan, Gagandeep Singh Risam
Abstract In two wheelers the front suspension system is mounted on chassis by two steering bearings which are lubricated ball type angular contact bearings with significant radial force components. These bearings are designed to withstand maximum vehicle loads for target durability. Maximum load carrying capacity depends on the number and size of the balls, bearing size and material. For target durability with designed load carrying capacity, the ball contact pressure, bearing preload plays a major role as compared to other design parameters. Geometry parameters and maximum load defines contact pressure for given bearing design. But in two wheelers due to nature of usage and road conditions, the peak loads are dynamic and geometry based design calculations may not yield the most optimal bearing design. In this work the bearing ball race profile design is optimized by using dynamic bearing contact profiles by using nonlinear Finite Element Analysis.
2016-11-08
Technical Paper
2016-32-0054
Barath Mohan, KVM Raju, Sai Praveen Velagapudi, Chandramouli Padmanabhan
The aim of the present study is to develop feasible test methods to measure the lateral force characteristics of motorcycle tires. In this work, new experimental procedures are developed to estimate the lateral friction coefficient and lateral stiffness characteristics of motorcycle tires. A fairly accurate tire model is developed using the measured lateral force characteristics. Based on this tire model, the steer behavior and the cornering limits of the motorcycle are estimated using an analytical model of the vehicle. The results are validated with experimental data. The test methods proposed are shown to be adequate to estimate tire characteristics that are important for tire development and is less expensive compared to the standard testing facilities available.
2016-11-08
Technical Paper
2016-32-0053
Hisato Tokunaga, Kazuhiro Ichikawa, Takumi Kawasaki, Akiyuki Yamasaki, Tatsuo Ichige, Tomoyuki Ishimori, Yoichi Sansho
Abstract Owing to the recent developments in sensors with reduced size and weight, it is now possible to install sensors on a body of a motorcycle to monitor its behavior during running. The analysis of maneuverability and stability has been performed based on the data resulted from measurements by these sensors. The tire forces and moments is an important measurement item in maneuverability and stability studies. However, the tire forces and moments is difficult to measure directly, therefore, it is a common practice to measure the force and the moment acting on the center of the wheel. The measuring device is called a wheel forces and moments sensor, and it is widely used for cars. The development of a wheel forces and moments sensor for motorcycles has difficulty particular to motorcycles. First, motorcycles run with their bodies largely banked, which restricts positioning the sensors.
2016-11-08
Journal Article
2016-32-0051
Keisuke Terada, Takayuki Sano, Kenichi Watanabe, Takashi Kaieda, Kazuhisa Takano
Abstract In recent years three-wheel camber vehicles, with two wheels in the front and a single rear wheel, have been growing in popularity. We call this kind of vehicle A “Leaning Multi Wheel category Vehicle” (hereinafter referred to as a “LMWV”). A LMWV has various characteristics, but one of them stands out in particular. When a LMWV is cornering, if one of the front wheels passes over a section of road surface with a low friction coefficient, there is very little disturbance to the vehicle’s behavior and can continue to be driven as normal. However, there has been no investigation into why these vehicles have this particular characteristic. Consequently, in this paper an investigation was carried out in order to determine the behavior of a LMWV in this situation. First, measurements were taken using an actual vehicle to confirm the situation described above.
2016-11-03
WIP Standard
AIR6805
This document will outline existing best practices in the instrumentation of landing gears for in-service operation (including flight test, operational loads monitoring, etc.).
CURRENT
2016-11-01
Standard
J2580_201611
This Recommended Practice covers air braked trucks, truck-tractors, trailers and buses. It enumerates the identification and installation of the air brake components not covered in other SAE recommended practices and standards.
CURRENT
2016-10-25
Standard
J2690_201610
This SAE Recommended Practice establishes uniform test procedures for friction based parking brake components used in conjunction with hydraulic service braked vehicles with a gross vehicle weight rating greater than 4500 kg (10 000 lb). The components covered in this document are the primary actuation and the foundation park brake. Various peripheral devices such as application dashboard switches or indicators are not included. These test procedures include the following: a. Brake Related Tests 1. Brake Functional Performance 2. Brake Dynamic Torque Performance 3. Brake Corrosion Resistance 4. Brake Endurance with Torque 5. Brake Endurance without Torque 6. Vibration Resistance 7. Brake Ultimate Static Load 8. Brake Lining Wear Adjuster Function b. Actuation Related Tests 1. Mechanical Actuator Functional Performance 2. Mechanical Actuator Endurance 3. Mechanical Actuator Quick Release 4. Mechanical Actuator Ultimate Load 5. Spring Apply Actuator Functional Performance 6.
CURRENT
2016-10-21
Standard
ARP1619B
This SAE Aerospace Recommended Practice (ARP) defines recommended planning and substantiation procedures and associated reviewing and approval processes to confirm that proposed changes do not compromise the demonstrated safety of the originally certified aircraft, and performance and aircraft compatibility are appropriately addressed in aircraft documentation. Successful demonstration also requires that failure modes be identified and mitigation provided for each. These procedures apply to modifications made by the original component or assembly supplier as well as approval of an alternate supplier.
2016-10-20
Article
Leveraging junior racing to interest youngsters in engineering careers gets a boost in Europe as Renault launches a UK Clio Cup Junior Championship for 2017.
2016-10-17
Technical Paper
2016-01-2233
Matthew C. Robinson, Nigel N. Clark
Abstract The free piston engine combined with a linear electric alternator has the potential to be a highly efficient converter from fossil fuel energy to electrical power. With only a single major moving part (the translating rod), mechanical friction is reduced compared to conventional crankshaft technology. Instead of crankshaft linkages, the motion of the translator is driven by the force balance between the engine cylinder, alternator, damping losses, and springs. Focusing primarily on mechanical springs, this paper explores the use of springs to increase engine speed and reduce cyclic variability. A numeric model has been constructed in MATLAB®/Simulink to represent the various subsystems, including the engine, alternator, and springs. Within the simulation is a controller that forces the engine to operate at a constant compression ratio by affecting the alternator load.
2016-10-13
Article
Ram's latest concept truck, the Rebel TRX, is clearly aimed at Ford's production 2017 Raptor which features a new twin-turbocharged 3.5-L V6.
2016-10-12
WIP Standard
J379
Gogan hardness, a nondestructive (a penetrator causes shallow surface deformation) method of measuring compressibility, is used as a quality control check of the consistency of formulation and processing of brake lining. Gogan hardness alone shows nothing about a lining's ability to develop friction or to resist fade when used as a friction element in brakes. Gogan hardness varies with formulation, contour, and thickness of the lining. The Gogan hardness and the range of Gogan hardness are peculiar to each formulation, thickness, and contour and, therefore, the acceptable values or range must be established for each formulation and part configuration by the manufacturer.
2016-10-12
WIP Standard
J2581
This SAE Information report defines the thermal transport properties important in the assessment of heat management capability of brake lining, shoe, disc and drum materials. The report discusses thermal diffusivity, specific heat capacity, thermal conductivity and thermal expansion. Measurement techniques for the appropriate ASTM standards are identified. The thermal transport properties discussed are material sample properties, not the properties of entire components such as pad assemblies.
2016-10-12
WIP Standard
J380
Specific gravity is a nondestructive test used as a quality control check of the consistency of formulation and processing of brake lining. The specific gravity and the range of specific gravity are peculiar to each formulation and, therefore, the acceptable values or range must be established for each formulation by the manufacturer. Specific gravity alone shows nothing about a materials in use performance. The specific gravity of sintered metal powder friction materials, particularly those which have steel backing members, is usually determined somewhat differently. Reference ASTM B 376. Purpose To establish a uniform procedure for determining the specific gravity of brake friction material.
2016-10-10
Article
Nachi America’s automotive hydraulics division has developed a 2-way automatic transmission valve that supports the increased OE demands for large volumes of transmission fluid.
2016-10-10
WIP Standard
J238
This SAE Standard covers general, dimensional data, and methods of test for two types of general purpose nut and conical spring washer assemblies, designated Type LN and Type HN, intended for mass production and other operations where speed and convenience are paramount factors.
2016-10-07
Magazine
The Best of COMVEC 2016 Autonomous vehicles, improved fuel efficiency and thermal management are among the pressing topics detailed in this select group of technical papers from the SAE Commercial Vehicle Engineering Congress. Autonomous solutions in agriculture Pneumatically shifted air suspension loading on 6x2 trucks Optimizing waste heat recovery for long-haul trucks Downsizing a HD diesel engine for off-highway applications Fan-shroud optimization for enhanced thermal performance Touch takes hold, switches lend a hand Touch screens are becoming the norm, but knobs and switches are often used to improve operator comfort. U.S. Army marches toward driverless future TARDEC targets vehicle autonomy with new V2V / V2X test bed in Michigan.
2016-10-06
Article
Peugeot used the 2016 Paris Show for the public launch of the 3008 and 5008 models, now re-defined as SUVs. Both models use the PSA Efficient Modular Platform 2 (EMP2).
Viewing 1 to 30 of 10739

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