Hydraulics still in control of off-highway
Engineers continue to master electronic controllers and software to
help systems manage engine speeds and boost efficiency, to the
ultimate benefit of both OEMs and end-users.
Off-highway calibration challenges-big and
As the final set of Tier 4 regulations kick in for engines greater
than 750 hp (560 kW), calibration efforts must contend with complex
engine and aftertreatment systems. Engine manufacturers and service
providers deal with this complexity, but does it need to be
DEF delivery modelling for SCR systems
Researchers characterize a 0-D model of a urea delivery module,
oriented to model-based control and to the simulation of the system
response to fault injections finalized to diagnosis
Development trends for heavy engines
Downsizing engine displacement, new materials, friction reduction,
and advanced boosting and fuel-injection technologies have
demonstrated potential in light-duty vehicles, and implementation
is under way. FEV experts provide an outlook of how these
technologies can improve the base engine for commercial
applications with regard to future emissions and fuel-efficiency
Rotary SI/CI combustion engines: A thing of the
The internal combustion engine enjoys widespread use as an
inexpensive and reliable power conversion system. While piston
engines date back 150 years, various alternative engine
architectures and cycles have been considered.
Aftertreatment comes with challenging
Diagnosing engine and aftertreatment systems is forcing design
teams to look at new ways to diagnose problems over long vehicle
Taking on NVH reduction techniques
A look at the enhanced durability benefits obtained by changing the
polymer composition, manufacturing methods, and design optimization
of a powertrain mount for an off-highway vehicle.
Making virtual vehicle design a reality
A new virtual design approach for commercial vehicle concepts
allows for purposeful design and integration of new concepts and
technologies on the component level in an existing product
portfolio, while not neglecting the need for standardization and
Calibration and complexity
Off-highway engine applications continue to increase in complexity
to meet emissions regulations and fuel economy targets as well as
to take advantage of advances in electrification and mechatronics.
The model-based calibration process has become the industry
ECU advances take many paths
Controllers are evolving rapidly, with a range of microcontrollers
distributed throughout the vehicle
A new electrohydraulic steering technology that offers energy
efficiency improvement, increased productivity, enhanced safety,
and adaptability to operating conditions also has the capacity to
support remote operation of a compact wheel loader.
Putting lightweighting to the test
Material laws and orientation information are coupled in a single
finite element analysis to predict the performance of the hybrid
composite beam under a dynamic three point bending load.
Screens, cameras provide new look in
Video inputs are another option showing up on displays that
increasingly offer touch control.
Big performance in small packages
By regulating light-duty engine variable speed fans based on heat
rejection demands and ambient temperature, consistent power savings
over the entire operating spectrum can be achieved.
Off-highway engines advance beyond Tier
With Tier 4 Final/Stage IV needs met, engine OEMs direct their
focus and competitive energies toward optimizing competitive
solutions. At the same time, they need to keep a weather eye out
for future regulations, which many expect.
Autonomous vehicle challenges span many
Many of the challenges faced by military and commercial design
teams are similar.
With a quiet cab at the top of many tractor buyers' wish lists,
agricultural equipment manufacturers are pursuing every opportunity
possible to shed decibels.
Off-highway industry executives write about some of the challenges
and trends facing the industry over the next 20 years, and the
innovation that will be required to stay competitive and
Annual product guide
A product roundup showcasing the newest and most innovative
supplier technologies in a variety of areas such as Powertrain
& Energy, Electronics, Hydraulics, Materials, Testing &
Simulation, Body and Chassis, and Interiors.
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
Gearshift actuator dynamics in a dual clutch
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
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.
What's New at ConExpo/IFPE
A preview of some of the 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.
Injection strategies for improving emissions
Premixed charge compression ignition reduces NOx and soot
emissions, but requires the optimization of the injection timing
and pressure, fuel mass in pilot injection, and EG R rate.
Systems that talk together, are efficient
Design teams take a holistic view, linking engines, transmissions,
hydraulics, and aftertreatment systems to boost efficiency and
Managing the deluge of data
The model-based development (MBD) process has been a key enabler of
technical advancement in the transportation industry; however, the
MBD process leads to the generation of large volumes of data
artifacts and work products. To maintain efficiency while
continuously improving the quality of products, it is necessary to
be able to manage this data in an efficient manner.
A vision for SAE's future
Longtime GM engineering executive and STEM education supporter
Daniel M. Hancock brings a focused approach to his term as SAE
Tackling biodiesel's technical
Caterpillar researchers are working to mitigate biodiesel's
negative effects on engine components and aftertreatment
More for less
Telematic systems are offering more features and functions for
Improving actuation speed and
With high-speed hydraulic proportional valves, the performance of
existing cam phasing systems can be improved or the actuation
mechanisms can be applied directly to engine valve actuation.
Heavy-duty composite brake crack
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.
Simulating off-highway hybrids
With customers squeezed by fuel costs, off-highway OEMs are showing
some interest in developing hybrid equipment. CAE simulation tools
are needed because of lack of experience with such devices. Their
functional complexity requires control system simulation throughout
A hose is a hose is a hose
Researchers develop a method for the precise mounting of a
hydraulic hose model.
Integrity sensing for safety
Researchers from Purdue developed a capacitance-based method for
monitoring the integrity of tires, hoses, and other polymeric
products during manufacturing and throughout the useful product
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.