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2017-08-22
Article
The wheel rim consists of two aluminium (Al) parts, the inner Al carrier star with the Al brake disk and the outer Al rim well with the tyre. Unlike a conventional disc brake, the New Wheel Concept brake engages the Al disk from the inside. This allows it to have a particularly large diameter, enhancing braking performance.
2017-08-21
Article
The Activac system debuted on 2017MY Ford F-150s powered by the second-generation 3.5-L EcoBoost V6. Weighing 1.82 lb, the vacuum-generation system, including hoses, replaced a 2.27 lb cam-driven mechanical pump.
2017-08-17
Journal Article
2017-01-9683
Rui Ma, John B. Ferris, Alexander A. Reid, David J. Gorsich
Abstract Computationally efficient tire models are needed to meet the timing and accuracy demands of the iterative vehicle design process. Axisymmetric, circumferentially isotropic, planar, discretized models defined by their quasi-static constraint modes have been proposed that are parameterized by a single stiffness parameter and two shape parameters. These models predict the deformed shape independently from the overall tire stiffness and the forces acting on the tire, but the parameterization of these models is not well defined. This work develops an admissible domain of the shape parameters based on the deformation limitations of a physical tire, such that the tire stiffness properties cannot be negative, the deformed shape of the tire under quasi-static loading cannot be dominated by a single harmonic, and the low spatial frequency components must contribute more than higher frequency components to the overall tire shape.
CURRENT
2017-08-15
Standard
AS5714A
This SAE Aerospace Standard (AS) prescribes the Minimum Performance Standards (MPS) for wheel, brake, and wheel and brake assemblies to be used on aircraft certificated under 14 CFR Parts 23, 27, and 29. Compliance with this specification is not considered approval for installation on any aircraft.
CURRENT
2017-08-14
Standard
AMS7301J
This specification covers low-alloy steel springs made of annealed round wire heat treated after forming.
CURRENT
2017-08-14
Standard
J1204_201708
This SAE Recommended Practice provides uniform procedures and minimum performance requirements for fatigue testing ferrous and aluminum wheels intended for normal highway service on travel, camping, and boat and light utility trailers drawn by passenger cars, light trucks, and multipurpose vehicles. For procedures and minimum performance requirements for wheels used on trucks, see SAE J267, and for wheels used on passenger cars, see SAE J328. For the application of passenger car and light truck wheels (inset less than 0.10 m) to this trailer service, use this procedure. For the application of heavier truck wheels (inset 0.10 m (or more)) use SAE J267. Mobile home service is outside the scope of this document. There are two basic test procedures described, a cornering fatigue test and radial fatigue test. The cornering test is directed at the wheel disc; whereas the radial test also examines the rim and attachment portion of the wheel.
2017-08-11
Journal Article
2017-01-9379
John Thomas, Shean Huff, Brian West, Paul Chambon
Abstract Aggressive driving is an important topic for many reasons, one of which is higher energy used per unit distance traveled, potentially accompanied by an elevated production of greenhouse gases and other pollutants. Examining a large data set of self-reported fuel economy (FE) values revealed that the dispersion of FE values is quite large and is larger for hybrid electric vehicles (HEVs) than for conventional gasoline vehicles. This occurred despite the fact that the city and highway FE ratings for HEVs are generally much closer in value than for conventional gasoline vehicles. A study was undertaken to better understand this and better quantify the effects of aggressive driving, including reviewing past aggressive driving studies, developing and exercising a new vehicle energy model, and conducting a related experimental investigation.
2017-08-10
Article
New compact utility leverages Fuji Heavy Industries' latest global platform for improved ride, handling, NVH attenuation and crashworthiness. But power and torque are lacking.
2017-08-10
WIP Standard
AS6541
Defines the requirements for a typical aircraft wheel valve assembly. Required material, tolerance(s) and appropriate finishes are provided.
CURRENT
2017-08-07
Standard
AMSQQW428B
This specification covers uncoated, round, high carbon steel wire for the fabrication of mechanical springs and wire forms for general purpose use.
2017-08-03
WIP Standard
J3153
To develop a recommended practice for taking photographs of a damaged vehicle to preserve evidence.
2017-08-03
Magazine
Hacked! Is automotive ready for the inevitable? Cybersecurity experts talk defense strategies. Active Aero takes flight Reconfigurable "smart" aerodynamic aids are stretching performance-car envelopes in every direction. The motorcycle's balanced future With its Ride Assist technology, Honda R&D moves two-wheelers toward autonomous capability. Honoring lightweight innovation Chrysler, Toyota, Faurecia and AP&T recognized with the 2017 Altair Enlighten Award for their efforts to reduce vehicle weight.
2017-08-02
Article
The American Chemistry Council and researchers at Michigan State University have demonstrated that a new “reversible” adhesive for multi-material joining actually gets stronger after use and repair/rebonding.
2017-07-31
Article
Boeing and Tata Advanced Systems Limited announced delivery of the first crown and tailcone assembly for the Indian configuration of the CH-47F Chinook helicopter.
2017-07-27
WIP Standard
J1406
This SAE Recommended Practice covers the application of hydraulic brake hose (as defined by current issue of SAE J1401) as used to provide a flexible hydraulic connection between wheel end or axle brake system components on motor vehicles. The purpose of this document is to outline design, operating, and service factors in routing a hydraulic brake hose assembly to a vehicle. It is intended to serve as a recommended practice for original equipment manufacturers. Vehicle design circumstances may exist that prevent strict adherence to this document. Any deviations should have the concurrence of all engineering functions involved.
CURRENT
2017-07-26
Standard
J2452_201707
This SAE Recommended Practice is applicable to pneumatic Passenger Car "P" Type, Light Truck Metric, and Light Truck High Flotation tires, or similar tires approved by bodies other than Tire & Rim Association. The methodology is applicable within normal operating ranges of vertical load and inflation pressure, and for velocities between 115 km/h and 15 km/h (71 mph and 9 mph) during a relatively short duration event such as a coastdown. This procedure is applicable only to operation in the free-rolling mode at zero slip and camber angle for ambient temperatures between 20 °C and 28 °C (68 °F and 82 °F) and for surfaces with diameters of 1.2 m (48 in) diameter or greater. Details regarding the equipment, tires, and test methods used specifically for validation of this document are included in Appendix A.
2017-07-24
Article
The new DRiV damping system makes pickups and SUVs drive and ride as well as they haul and tow
CURRENT
2017-07-24
Standard
J2625_201707
This procedure is applicable to squeal type noise occurrences for passenger car and light truck type vehicles that are used under conventional operating conditions. For the purposes of this test procedure, squeal is defined as occurring between 900 and 18 000 Hz.
HISTORICAL
2017-07-19
Standard
J1939DA_201707
This document is intended to supplement the J1939 documents by offering the J1939 information in a form that can be sorted and search for easier use.
2017-07-18
WIP Standard
J2986
This Recommended Practice provides a common method to measure wear of friction materials (brake pad assemblies and brake shoes) and their mating part (brake rotor or brake drum). These wear measurements apply to brakes fitted on passenger cars and light trucks up to 4,540 kg of Gross Vehicle Weight Rating or vehicles category M1 on the European Community.
2017-07-18
WIP Standard
J3152
Define general taxonomy (classification) of the most common fixture designs. Provide general design, fabrication, and installation guidelines to improve repeatability, reproducibility of vehicle conditions (including preloading) of brake fixtures for inertia dynamometer NVH testing.
2017-07-18
WIP Standard
J3002
This procedure will outline the necessary test equipment (fixturing, dynamometer, data acquisition system, etc.) and test sequence required to test for low-frequency brake noise on a brake noise dynamometer. It is intended to complement SAEJ2521, which focuses on high-frequency brake squeal.
2017-07-14
Article
Designed in Japan with exterior surfacing finalized at Honda’s California studio, the 2018 Accord is up to 176 lb (89 kg) lighter than the outgoing model, depending on trim level. Key technical features include two new turbocharged gasoline engines, the first use of a 10-speed automatic transaxle (Honda’s own 10AT) in front-drive sedan, and the return to the low-cowl/thin pillar body architecture.
2017-07-14
Article
Audi's new active suspension uses a Mobileye monocular camera to generate vertical information from the road with a resolution of 1.2 to 6 inches. Combined with new all-wheel steering and an e-booster, the car greatly benefits from 48-V electrical power.
2017-07-10
Article
Reconfigurable aerodynamic aids are stretching performance-car envelopes in every direction.
2017-07-10
Technical Paper
2017-28-1926
Jos Frank, Sohin Doshi, Manchi Rao, Prasath Raghavendran
Abstract In today’s automotive scenario, noise vibration and harshness (NVH) has become a synonym for quality perception. This paper evaluates the problem of vibration and noise experienced in M2 category 40 seat bus and suggests the counter measures. Severe vibration is experienced on the bus floor, predominantly towards rear part of the bus. Vibration along with acoustic boom occurs prominently in 4th gear wide open throttle operating condition between 1300-1600 rpm of the engine. This paper focuses on reducing NVH levels by working on the transfer path with little modifications on power-train. Preliminary torsional measurements conducted on powertrain indicated high torsional excitation in the driveline during the problematic rpm zone. Further, Operational Deflection Shape (ODS) analysis revealed that the transfer path to the cabin is rear differential unit and suspension links. The dominant frequencies were identified along the transfer path and suitable modifications were done.
2017-07-10
Technical Paper
2017-28-1941
Anil Kumar Jaswal, Rajasekhar Madhurakavi, Pradeep Chandrasekaran
Abstract This paper details the methodology used to show the importance of Low rolling resistance tires in Electric Vehicles. Fuel efficiency and range is paramount with most of the electric vehicle buyers. Although many people are now becoming aware of low rolling resistance tires but its development started way back in 1990’s. It is always challenging to achieve low rolling resistance in smaller tires of size 12 inch or 13 inch along meeting the other critical vehicle parameters such as ride and handling, NVH, durability and many more. The reduction in rolling resistance can also affect the traction properties of tires. In case of very low rolling resistance tires the traction will be very less but it can badly affect the other vehicle parameters. Selection of tires further depend upon the RWUP (Real World Usage Profile). It means the vehicle is targeted for which region and what is the condition of roads there.
2017-07-10
Technical Paper
2017-28-1952
Utkarsh Sharma, Simson T. Wilson, Santosh Lalasure, K. Rajakumar
Abstract Today’s automotive industry in the process of better fuel efficiency and aiming less carbon foot print is trying to incorporate energy saving and hybrid technologies in their products. One of the trends which has been followed by Original Equipment Manufacturers (OEMs) is the usage of Electric Power Steering (EPS) system. This has been an effective option to target fuel saving as compared to hydraulically assisted power steering system. EPS has been already tested successfully, not only on system level but also on vehicle level for endurance and performance by OEMs as per their norms and standards. Over the decade, NVH (noise, vibration & harshness) have become one of the touch points for customer perception about vehicle quality. This leads us to a commonly perceived problem in EPS or manual type steering system i.e. rattle noise.
2017-07-10
Technical Paper
2017-28-1985
Hemasunder Banka, Radhika Muluka, Vikram Reddy
Abstract Conventional materials like steel, brass, aluminum etc will fail without any indication, cracks initiation, propagation, will takes place with a short span. Now-a-days to overcome these problem, conventional materials are replaced by hybrid composite material. Not only have this conventional material failed to meet the requirement of high technology applications, like space applications and marine applications and structural applications in order to meet the above requirements new materials are being searched. Hybrid composites materials found to the best alternative with its unique capacity of designing the materials to give required properties and light weight. This paper aims to preparing hybrid composite using artificial fibers. Epoxy as resin and glass fiber as fiber for artificial hybrid composite to make a laminate for preparing leaf spring.
2017-06-29
Book
Eduardo Galindo, David Blanco, Chris J. Brace, Edward Chappell, Richard Burke
The use of the chassis dynamometer test cells has been an integral part of the vehicle development and validation process for several decades, involving specialists from different fields, not all of them necessarily experts in automotive engineering. CHASSIS DYNAMOMETER TESTING: Addressing the Challenges of New Global Legislation (WLTP and RDE) sets out to gather knowledge from multiple groups of specialists to better understand the testing challenges associated with the vehicle chassis dynamometer test cells, and enable informed design and use of these facilities.
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