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Hydrostatic transmissions in conventional envelopes Kubota designed a hydrostatic transmission for a compact tractor to improve operator control and increase efficiency and productivity. Design of a hydraulic free-piston engine Dutch companies Noax and Innas have developed an engine in which nearly all combustion energy is directly converted into hydraulic energy. Optimizing tractive performance Canadian researchers correlate analytical predictions and experimental data to determine that the proper matching of front- and rear-tire sizes, aswell as careful control of inflation pressure and normal load of the tires, is necessary to achieve optimum tractive performance of four-wheel-drive tractors. Actively suspending off-road vehicles The University of Texas Center for Electromechanics evaluated a retrofit electromechanical active suspension that s hows promise of improved cross-country mobility for military vehicles.

Changing demands reshape hydraulic components In a world of shrinking margins, fierce competition, and increasing regulations, equipment owners want nothing less than stellar performance from their equipment. Contact stress in valvetrains Engineers from Mahle compared FEA and Hertzian equations for the calculation of contact stress in a roller-follower valvetrain system. High-fidelity agricultural tires Researchers from Goodyear and John Deere developed finite element tire models capable of generating quasi-static spindle forces and moments for prescribed displacements over irregular terrain. Ag-equipment development challenges An engineer in the field discusses the need to tread carefully during the agricultural product-development process.

Huge loader: huge tire Tire technology retains a direct controlling influence over wheeled machine mass and application requirements. Getting engineers off the streets Hands-on experience and career-long training are widely employed to equip engineers with a skill set more varied than just technical know-how. Driving blind Industry, government, and academia have their eyes on autonomous off-highway vehicles. Introducing Duane Tiede, SAE President for 2004 With over 35 years of diverse experience in the off-highway industry, Duane Tiede steps up to a new challenge-leading SAE into its 100th year.

Communicating without drivers Autonomous vehiclesrely on data communications. A big plan for small engines The design procesas for Perkins' 400 Series is driven by choice via continuous product improvements, not just by regulations. Bringing field to lab Mahindra & Mahindra cuts testing and evaluation time with new test system and statistical tools. Planning new wheels for the Army The ambitious Future Tactical Truck Systems program aims to leverage commercial sector know-how to make safer, more capable military vehicles.

Engineering Ford's future Product platform and operations chief Hau Thai-Tang on navigating the microchip shortage, compact-unibody trucks, EV and AV challenges, and driving engineering efficiencies amid the lockdown. NAWA aims for 5-minute EV charge A new nano-based carbon electrode is key to reducing electric-vehicle charging time. Hemphill's mission: Support the innovation ecosystem Schaeffler America CTO Jeff Hemphill brings impressive technical chops and well-honed communication skills to his new role as 2021 SAE International president.

Steering activated Vehicles are increasingly taking the wheel and steering themselves, with the promise of improved comfort, handling, and safety. Reflections of a product-development revolutionary Bob Lutz revitalized GM's PD process by challenging its protocols- while following his instincts for making compelling vehicles. Commercial success Technology transfer, a Class 8 hybrid, and lightweighting efforts highlight ArvinMeritor's innovation push in the commercial-vehicle space. EcoBoost, DCTs, and stop-start for the masses High-value, high-volume technologies are driving Ford's near-term conventional powertrain strategy, explains engineering chief Barb Samardzich. Breathing new life into Chrysler Engineering Engineering VP Scott Kunselman talks about working with Fiat, taking the lead in vehicle-electrification, and putting the mojo back into Chrysler's product-development team. Watching the charge The fusion of diagnostics and telematics may help boost electric vehicles.

Drivetrains: Challenging the design philosophy A researcher from the Southwest Research Institute focuses on one of the most immediate and dramatic changes of powertrain design: the introduction of CVTs. Elastohydrodynamic lubricants for CVTs In metal-to-metal continously variable transmissions, EHLs momentarily become part of the machinery, allowing for a much higher traction coefficient than is possible with hydrodynamic fluids. Hybrid vehicle dynamics Toyota engineers combined electronic control of the Estima minivan's breaking and driving functions to create its new Vehicle Dynamics Management system, resulting in improved environmental and vehicle performance. Jeep Commander 2 Chrysler Group engineers provide an inside look at one of the pioneering methanol fuel reforming fuel-cell concept vehicles. Improving SUV fuel economy Delphi is pursuing a strategy of engine shutdown and adding torque from an electric motor with its new 42-V integrated starter-generator.

Everything but the engine While an economical engine is the heart of a fuel-efficient vehicle, all other components contribute as well. From tires to body styles, here is a look at vehicles technologies that save fuel. Getting personal Electronics suppliers are developing systems for cars that help automakers adapt more functions to each driver's preferences. The lithium-ion charge is on Multiple engineering trade-offs define the capabilities and limitations of the latest lithium-ion batteries for next-generation hybrid, plug-in, and pure-electric vehicles. Braking forces Braking distance is one of the least important criteria when comparing braking systems, even for high-performance applications.

eAxles gain traction OEMs are developing and testing axles with integrated electric powertrains to electrify trucks of all sizes. Securing CAN networks in commercial vehicles A CAN transceiver with built-in security functions can avoid the complexity of end-to-end security solutions that are especially hard to implement on CVs. Electrification is the future for defense vehicles Despite infrastructure challenges, electrified and automated military vehicles will save fuel and lives, said Allison's VP of Defense Programs at SAE COMVEC 2022. Editorial Hiring talent to meet high-tech demands Allison's now open for hydrogen testing Electrification's impact on commercial-vehicle chassis design Harbinger prepares to enter commercial market with novel eAxle ZF, Freudenberg developing integrated 'Powerpack' fuel cell and e-drive Freightliner's medium-duty makeover for M2 and SD models Toyota's hydrogen fuel-cell powertrain provides an electrifying ride

Shed a few joules with better aerodynamics A team of engineering students from Laval University has managed to reduce the energy demand due to wind resistance of its Supermileage vehicle by 10% after carefully designing a new vehicle body with a 25% larger frontal area. Telemetry helps Formula SAE team close the loop on design Once a year, a team of students at Virginia Tech get to do something that ought to put a grin on any aspiring engineer's face: build a racecar. Unconventional steel wheel designs The drawings done by collegiate students for a steel wheel design competition had industry professionals thinking about future production possibilities.

The Nano in retrospect A senior graduate student in the Department of Mechanical Engineering at the Indian Institute of Technology looks at the development of the world's cheapest car and its effect on Indian car users. A different riff on your basic two-seat electric car Markus Lienkamp, Chair of Automotive Engineering at the Technical University of Munich, is leading the Visio.M project, a German government-supported R&D effort to produce a low-cost, high-utility electric car that might attract the interest of the middle European mass market. Materials lead the way to vehicle mass reduction Reducing a vehicle's mass opens the door for a downsized engine and transmission, a lighter cradle and body structure, smaller wheels and brakes, as well as a weight-slimmed suspension. The start point for this ripple effect is materials.

The row about rare earths Rare-earth elements are key to applications as varied as traction motors, catalytic converters, and wind turbines, but high prices and supply shortages have the auto industry grappling with design changes and other alternatives.

Risk, adventure, and learning from the past The Cal Poly 2009 Formula hybrid car with the funny wheels took first place in the "Hybrid in Progress" category. North American international auto show concepts The most significant vehicles features either full- or hybrid-electric powertrains, signaling the industry's intent to further electrify the new car world. Collaboration, innovation on agenda SAE 2010 World Congress to offer more focused technology and cost-saving solutions.

Steering a better path New mechanisms developed by NIT Warangal are simpler than the Ackermann type and allow all four wheels to undergo pure rolling. Monitoring fine particle concentrations A robust and versatile system has been developed by Pegasor Oy to measure engine exhaust particulate mass and number more accurately. New rules shuffle the F1 deck New turbocharged hybrid-electric power units and revised aerodynamics may scramble the familiar order in Formula One for 2014.

Powdered tires Researchers quantify several environmental benefits associated with using ultra-fine scrap tire rubber powders in virgin and recycled rubber and plastics compounds.

What's New at ConExpo/IFPE More new products and technologies that companies plan to showcase at this year's ConExpo-Con/Agg, which is co-located with the IFPE fluid-power event in Las Vegas from March 4-8, are previewed. Gearshift actuator dynamics in a dual clutch transmission The emergence of tougher environmental and fuel efficient legislations have triggered exploration and advance toward new and better vehicle transmission technologies. Software makes solid impact Programs are helping hydraulic systems do more while reducing operator workloads. Damping out booming noise NVH improvement techniques are gaining traction with the goal to improve the quality perception of off-highway equipment performance and operator comfort.

Tackling NVH one dB per day New tools and technologies are helping engineers reduce vehicle Noise, Vibration and Harshness. Artificial intelligence becomes a reality Automakers could be among the leaders in deploying AI in free-standing, high-reliability environments. But developers must determine how to mitigate undesirable side-effects. Lidar: autonomy's mission-critical component Automated-driving capability likely won't happen without Lidar. But what technology-and at what price? Formula One goes longer, lower, wider for 2017 New rules make the cars faster and more aggressive-looking, with a wider track, wider tires and bigger wings. Editorial: Core Ford, New Ford...OneFord? SAE Standards News Seeking a common language for vehicle automation Supplier Eye Are you innovating for NVH?

Level Zero hero Jeep's iconic Wrangler is all-new-and unapologetically analog. Fusing sensors for the automated-driving future Complex processing architectures, faster networks and even more sophisticated software are vital for 100% accurate Level 4 and 5 systems. Who wants Afreecar? One billion people globally survive on less than $2/day but desperately need personal mobility and electric power. One of the auto industry's most creative minds offers what could be a unique and sustainable solution. Dana opens new chapter on CVTs A dedicated development center is hustling the unique VariGlide "spherical traction drive" toward 2020 production. Plastics key to mobility innovations The 2017 SPE Innovation Awards highlight the design, engineering and materials-science collaborations between vehicle OEMs and their tier suppliers.