Search Results

Heavy-duty composite brake crack prediction Engineers used both analytical and dynamometer data to determine the damage tolerance of a selectively reinforced aluminum MMC brake drum, which provided some answers but left a lot of questions.

Optimizing brake-by-wire control An optimal control strategy is introduced that ensures minimum control effort that results in minimum actuator power consumption, while simultaneously providing efficient braking performance.

Hybrids step forward Electric and hydraulic systems trim fuel consumption and emissions, boost performance. Braking for safety Researchers developed a simplified ABS/EBS ECU test bench to research the brake force control function of the EBS system using HIL simulation technology. A metered look at dosing pumps High delivery accuracy, low weight, and dependably long life have made solenoid-operated pumps widely used in mobile applications.

Heavy-duty designs on aftertreatment The introduction of stringent EPA 2015 regulations for locomotive/marine engines and IMO 2016 Tier III marine engines precipitated the need to develop large diesel engine aftertreatment systems. Gaining control of damping Strong nonlinearities of hydraulic systems and the unpredictable operating conditions of the specific application (e.g., uneven ground, varying loads) are the main challenges to the development of satisfactory general vibration damping methods and controls. Getting real about test cycles Fuel consumption of working machines is strongly influenced by machine specification, working environment, and operator behavior, therefore a mix of several test cycles is necessary. The case for Class 8 hybrids Hybrid technology may not be the best solution for all heavy-truck applications, but a Caron Engineering expert explains how it can still benefit Class 8 vehicles.

Heavy-duty engine blender Researchers at Southwest Research Institute and Navistar exploring the feasibility of micro-pilot diesel-injection dual-fuel combustion at key part load conditions found it offers ultra-low smoke and NOx emissions while maintaining diesel-comparable fuel consumption and noise levels.

Biofuel opportunities and pitfalls Annual growth in biofuels has been strong but is expected to slow in the near future. User interfaces going mainstream Off-highway HMIs use consumer technologies to add functions, simplify tasks. Reducing the environmental impact of hydraulic systems OEMS and their suppliers are creating new hydraulic systems and components, using new fluids and remanufacturing to save energy and reduce the environmental impact of off-highway equipment. Multiple controllers add to EV complexity Model-based design has revolutionized the way products are developed, with design shifting from parts to the whole.

High-performance polymers and biofuel compatibility During the material selection process for engine components such as fuel rails, filter housings, and connectors, engineers need to take into account not only the basic tenets of metal-to-plastic conversion, but also the type of fuel and its impact on the performance of the materials.

Hydraulic architecture strategies Researchers compare two different rule-based power-management strategies, in terms of their resultant fuel consumptions, through a simulation study as applied to a hybrid hydraulic multi-actuator displacement controlled system.

Technology crosses industry borders Between the commercial- and military - vehicle markets, knowledge sharing and tech transfer benefit both in areas such as vehicle electrification and alternative fuels.

Tier 4 for large bore Engineers show that a pre-turbine aftertreatment system offers clear and distinct benefits in terms of compact, cost-effective emissions reductions. Programmed for safety and reliability The software that adds features and functions is becoming more reliable as standards and new techniques transform design processes. Electrohydraulics improve with new lift-control strategy Fuel consumption, torque delivery, and emissions can all be improved through flexible control of the valve timing, duration, and lift.

Losing weight with lost foam casting Equipment made with lightweight materials can improve fuel consumption and increase available payload capacity.

What we have here is a desire to communicate Telematic service and equipment providers are racing to gain market share in what's expected to become a solid long-term market. Sizing up accumulators No other feature of a hydraulic hybrid has more effect on the end performance of the powertrain than the accumulator. modeling helps to provide specific guidance with regard to establishing pre-charge pressure. Beating a path to biodiesel Multiple pathways are being pursued to increase biodiesel use, reduce dependence on petroleum, and improve the environment, but the best route is not yet known.

Enlisting aluminum The need for lighter weight and better efficiency has led to oncreased application of aluminum armor plate for military vehicles.

A quiet revolution Optimizing design, while minimizing NVH, in off-highway equipment and systems. Inferential sensing Engineers propose an onboard electronics hardware and software architecture that can deliver condition-based maintenance solutions in a low-cost platform. Lightweight but heavy duty A look at the design, analysis, testing, and application engineering performed to develop a selectively reinforced brake drum made of aluminum metal matrix composite. Shifting gears smoothly Ric Kleine, a 30-year veteran of Cummins Inc. and former SAE Commercial Vehicle VP, seeks continuity over change as he moves into SAE's driver's seat.

Cold metal transfer process picks up heat CMT, with its unique characteristics, is a process that was designed particularly for welding of thin materials while achieving high quality standards.

Still need steel? The use of ultra-high-strength steels is on the rise in a number of industries, including off-highway. But many alternatives are being considered, driven by the need of companies to be environmentally friendly.

The diesel engine diet Researchers correlate engine performance and durability with the properties of alternative fuels that consist of vegetable oils and animal fats. Looking at a safer future Software, other sensors will augment cameras as safety's role in the off-highway industry takes an upward spiral. Plastics expand their range From high-speed train exterior panels to powertrain components, plastics and composite materials are finding their way into more off-highway applications.

No stopping global design Global teams ride down the cyber highway. Engines play clean in the flight to meet increasing regulations Sensors, faster CPUs help reduce emissions while maintaining performance. Hydraulics have the power to control The latest generation of hydraulic systems provides an effective alternative to other forms of motion control. A home away from home Technology advances help to make equipment operators more comfortable- and more and more productive- in hte field, in the pit, and on the job site. Ryan's 'Research' put to good use The Southwest Research Institute engineer assumes SAE President duties for 2008. Biofuel effects As the off-highway industry in Europe prepares for the introduction of biofuel, specialists are attempting to anticipate potential mechanical and chemical problems it may bring to powertrain systems and component operation- and prepare the answers.

Making sense of engines Heavy-duty equipment is known for its ruggedness in harsh environments, but vehicles are not neglecting their sensitive side. The world's fastest digger gets closer JCB's Dieselmax goes 350 mph and teaches engineers much about engine capability, extreme testing, and program management. The whole system, and nothing but the system Properly implemented, an electrohydraulic system can add a great deal of automatic control, advanced performance, advanced diagnostics, and remote monitoring to a mobile application. Regenerative hydraulics The use of multiple hydraulic pumps can satisfy the needs of various circuits in off-highway equipment. The gas is greener Biofuels promise to help reduce petroleum cinsumption and CO2 emissions, but much of the potential depends on production and infrastructure investments. Material returns Effective use of materials information is important to engineers in development of parts and components.

Next-generation power Additional benefits for commercial customers may drive hybrid technology adoption. Shake and bake: a recipe for testing Vehicles, components endure much in-lab abuse before they enter the commercial-vehicle market. Fuel for thought The performance and emissions of a stationary single-cylinder diesel engine is evaluated using an ethanol blend with diesel and jet fuels.