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SAE Off-Highway Engineering 2000-04-01

2000-04-01
Simulating cab noise and vibration Researchers at kubota and Doshisha University have established a prediction method for the engine-idling state using statistical energy analysis. Manufacturing cost estimating Caterpillar's ACT Group uses Micro Estimating Systems' computer-aided estimating program to increase efficiency and decrease operating costs in powder-metal part manufacturing. In search of greener pastures Agricultural OEMs are looking at the total life cycle to develop more environmentally conscious products and processes. Emissions and lubrication More stringent diesel emissions legislation is placing an increased burden on engine lubricant in the form of soot loading.
Magazine

SAE Off-Highway Engineering 2004-10-01

2004-10-01
Beyond batteries the reinvention of a 100-year old electrical energy-storage device could transform heavy-duty hybrid drive systems. Pumping down the volume The design evolution of low-noise spur and helical gear pumps. Tackling Tier 3 Both Cummins and Caterpillar choose the in-cylinder approach to reducing emissions. The telematics fix Diagnostics may be the key to keeping telematics viable and affordable. Complete and intelligent systems SAE 100 Future look: The future of mobile hydraulics can be seen today. Modern mobile hydraulics of today and tomorrow consists of complete system solutions with integrated electronics, which make off-highway machinery more efficient and, at the same time, reduce life-cycle costs. The next step in hydraulics and electronics SAE 100 Future Look: As we celebrate 100 years of SAE's contributions to our industry, it seems very appropriate to look forward at the next few years and assess where we will be.
Magazine

SAE Off-Highway Engineering 2003-11-01

2003-11-01
Electronics invade the cab Joysticks and displays lead the transitions from mechanical links. Developing alternatives According to Ford Power Products, hydrogen-powered engines can be a reality, but while waiting for them to be economical with a developed infrastructure, other alternatives to diesel and gasoline are available. Optimization of structural components Researchers from Dana present a new design methodology to develop structural components using computer-aided engineering tools.
Magazine

SAE Off-Highway Engineering 2001-09-01

2001-09-01
Bridging the power gap An alliance between Cummins and Komatsu provides an intriguing prospect to the industrial engine market with the new QSK78 industrial engine. Large eddy simulation in hydraulic valves Cavitation in hydraulic spool valaves involves large-scale vortical structures in an unsteady submerged jet. According to engineers from Purdue University, curent CFD approaches do not accurately predict these unsteady vortices, nor do they properly account for bubble-dynamics/flow-structure interactions. Proving heavy-vehicle performance The Nevada Automotive Test Center and Mechanical Dynamics joined forces to redesign and improve the drivetrain, frame, steering, and other subsystems of a heavy-duty military-vehicle for the USMC. Tying it all together GPS. Engine diagnostics. Wireless communications. So much technology. So many voices. Is it a chorus of the Tower of Babel?
Magazine

SAE Off-Highway Engineering 2008-10-01

2008-10-01
Tying it all together Networks link control modules to bring more features and functions to the job site. Collaboration tools spread a wide net PLM suppliers are offering new tools that aid collaboration, expanding on core offerings in PDM, CAD, and CAE. The drive toward a hybrid transmission In-wheel hydraulic motors, hydraulic transformers, and a common pressure rail with accumulators put new meaning in the word drivetrain. A deep dive into metallurgical failure Even with the best engineering processes and quality planning, deviations can occur with the incoming material, things can go wrong during the manufacturing process, and service conditions can be different than expected. Standards and 'coopetition' In the heavy-duty vehicle arena, adoption of standards for networking benefits everyone.
Magazine

SAE Off-Highway Engineering 2000-09-01

2000-09-01
Simulating air-conditioning performance A computer program developed by Modine Climate Systems and Modelogics helps determine and optimize air-conditioning system performance. Reduced mass haul-truck design concepts Liebherr Mining trucks adopted a reduced structural mass approach to convert unladen weight directly into payload, while simultaneously incorporating state-of-the-art driveline technology. Optimizing a tractor frame for improved cabin NVH To address an aging agricultural workforce and modern ergonomic guidelines, researchers at Doshisha University and Kubota modeled medium- and large-sized agricultural tractors to reduce vibration and noise and increase comfort. Applying 3d-CAD to turbocharger development Ishkawajima-Harima Heavy Industries has developed a 3d-CAD system for turbochargers. satisfying requirements for digital mockup development.
Magazine

SAE Off-Highway Engineering 2006-09-01

2006-09-01
Integration helps fuel push for conservation As rising fuel prices and looming environmental regulations bring fuel economy to the fore, hydraulic system developers are pitching in to improve efficiency and help conserve precious resources. Simulating hydraulic valve pressure drop CFD software is being used more and more frequently during the design of off-highway systems and components. 2006 Commercial Vehicle Congress Preview International Truck and Engine executives head the charge for "positive industry change" at SAE's third Congress for the on-and off-highway communities. Position sensing in machine controls As performance requirements for off-highway equipment become more demanding, the need for greater control of motion and power grows as well.
Magazine

SAE Off-Highway Engineering 2008-09-01

2008-09-01
Shrinking hydraulics The push to conserve fuel and reduce emissions is prompting major changes in system design. Aftertreatment temperature control Regeneration of a DPF burns off soot, but also raises exhaust gas temperature. Speed thrills: doing more tests in less time Quicker data gathering, simulation keep quality high despite time crunch. Green engineering The quest to alleviate environmental and efficiency pressures turns up 'small' material solutions with big benefits. A global forum Cummins executives lay the groundwork for a lively and informative discussion at this year's Commercial Vehicle Engineering Congress & Exhibition.
Magazine

SAE Off-Highway Engineering 2009-08-01

2009-08-01
Bosch Rexroth Executive Viewpoints-Vehicle Development Insights from Industry: Off-Highway 2020 and Beyond- - Insights from the inside. Briggs & Stratton Executive Viewpoints-Vehicle Development Insights from Industry: Off-Highway 2020 and Beyond- Collaborations will drive success in the future. Cummins Executive Viewpoints-Vehicle Development Insights from Industry: Off-Highway 2020 and Beyond- Achieving more for less. Dana Executive Viewpoints-Vehicle Development Insights from Industry: Off-Highway 2020 and Beyond- Off-highway realities. Delphi Executive Viewpoints-Vehicle Development Insights from Industry: Off-Highway 2020 and Beyond- Communicating 2020 style. Eaton Executive Viewpoints-Vehicle Development Insights from Industry: Off-Highway 2020 and Beyond- My electronic crystal ball is full of hydraulic fluid.
Magazine

SAE Off-Highway Engineering 2007-04-01

2007-04-01
Help from above Cell towers and satellites enable people to keep equipment running. Cleaner and quieter diesels To meet tightening regulations, engineers are tasked with adding more and more components and systems to take away more and more emissions. Connecting sensors Suppliers and road construction OEMs have teamed to develop an application profile for sensor interfaces.
Magazine

SAE Off-Highway Engineering 2002-04-01

2002-04-01
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.
Magazine

SAE Off-Highway Engineering 2001-04-01

2001-04-01
Operator station innovations Off-highway engineers work hard to provide comfort, ease of operation, and reliability to users. As an added challenge, they must design for operators who can spend an entire day working hard in their cab. Designing online Major developments in internet-based technologies are profoundly changing the engineering/design process, revolutionizing the way OEMs and suppliers do business, and speeding the industry's time-to-market. FEA simulation of an electrohydraulic system Researchers from the Milwaukee School of Engineering provide an accurate model of a typical magentic actuator Predicting injury in forklift upsets Researchers from the Biomechanics Institute present test results that demonstrate operators can prevent ejection and injury from a forklift if they are lap-belted and have either a winged seat or hip restraint.
Magazine

SAE Off-Highway Engineering 2007-02-01

2007-02-01
Designs on electronics On-chip memories and new architectures change control functions. Seeing green Environmental and cost benefits are driving the adoption of bio-based and other 'eco' materials. Closing the loop on marine propulsion design Researchers develop tools for rapid prototyping and analysis of distributed safety-critical systems. Promoting from within After serving a three-year term as Vice President-Automotive, Rich Schaum, Chrysler's former product development chief, becomes the new face of SAE International.
Magazine

SAE Off-Highway Engineering 2002-02-01

2002-02-01
Evolution of ac-drive technology The introduction of inverter drives has stimulated development of the ultra-class haul trucks in operation today. Hydraulics in the age of specialization Today's hydraulics are to earlier systems as Sim City is to Lincoln Logs. Increasing sophistication has changed the way companies such as Eaton and Caterpillar build equipment, while users' expectations and regulators' demands keep rising. IT-tool for intelligent motion control A Danish mechatronic research program focused on intelligent motion control for rapid prototyping of fluid-power components and systems.
Magazine

SAE Off-Highway Engineering 2004-12-01

2004-12-01
Body building Caterpillar takes it upon itself to design a body for payload, performance, and durability. Getting on board with simulation Digital development is becoming more widespread and moving into areas and industries that have other long-established traditional design methods. 2004 technology in review A look back at some of the msot significant technological innovations in the news over the past year. Tradition, transition, and transformation SAE 100 Future Look: SAE reflects on a proud and rich transportation industry.
Magazine

SAE Off-Highway Engineering 2007-12-01

2007-12-01
Economies of (drivetrain) scale Emissions challenges continue, but engine and transmission technology is advancing solutions and improving vehicle systems intergration. Searching for real-world responses Prototype testing is constantly changing as electronic technologies help transform equipment; design processes adjust as digital development evolves. Hydraulic brakes on one hand, air brakes on the other Building a better brake system had continued to challenge engineers for more than a century, as a changing world has demanded correspondingly advanced brake technology. Top technologies of 2007 A look back at some of the most significant technological innovations during the past year.
Magazine

SAE Off-Highway Engineering 2005-12-01

2005-12-01
Delivering simulation benefits Product-development software tools are being put to good use in many off-highway industry segments. Movingalong with stationary power Performance, reliability, and cleanliness are just a few of the golden rules for all engines, whether they are propelling a tractor or powering a barn. Frames adapt to changing environments Heavy-equipment frames do not often get a lot of attention from customers, due mainly to the fact that they get plenty of attention during the design cycle. 2005 technology in review A look back at some of the most significant technological innovations in the news during the past year, as deemed by readers and editors.
Magazine

SAE Off-Highway Engineering 2003-12-01

2003-12-01
Top technologies of 2003 A review of the 10 most significant stories published in SAE Off-Highway Engineering over the past years, as selected by the magazine's readers and editors. manufacturing gets a makeover Supply-chain management and automation add efficiency to the process. Simulation goes off road The off-highway industry is using computer modeling to reduce cost and save time in a variety of ways. Full-throttleflexibility Design, engineering, supply-chain management, and other factors pave the way for "manufacturing-that-can-turn-on-a-dime" capability at Oshkosh Truck Corp. High-speed-hauling system The global market for articulated dump trucks continues to be increasingly competitive with a seemingly endless stream of new model introductions.
Magazine

SAE Off-Highway Engineering 2000-02-01

2000-02-01
Hydrostatic drives in heavy equipment The benfits of using modern hydrostatic components in conjunction with shiftable gearboxes and computer controls include a large control range, precise control of traction effort and speed, and high efficiency. Dynamic simulation of tracked vehicles Researchers from Purdue University, the Federal University of Vicosa, and Caterpillar, have developed a soil/track interface simulation program to model mechanical and hydraulic powertrains commonly found in tracked vehicles.
Magazine

SAE Off-Highway Engineering 2004-02-01

2004-02-01
heavy-duty visions MTU and DDC devoted engineers toward the development of engine technology for future military-vehicle applications. Smooth operation The interface between man and the machine can be made more comfortable, not to mention more productive, via the use of electronics. History of gerotor hydraulics The first part in a retrospective of the development of gerotor technology, the engineers behind the breakthroughs, and an acquisition here and there. Advances in fuel injection Engineers from Delphi address drive-circuit modeling and analysis of electronically controlled fuel injectors for heavy-duty diesel engines. CAE in hydraulics Analysis solves problems dealing with NVH and complicated dynamics inherent in check-valve design, development, and organization.
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