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.
Advanced insulation packages, solar reflective film, and other
thermal-management technologies enable heavy vehicles to reduce
idle climate control loads, as demonstrated by NREL's CoolCab
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
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
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.
Oil spatter cooling shows promise in heavy-duty tractor
Research conducted at Tractors and Farm Equipment Ltd. finds a
distinct advantage of oil spatter technology over dry clutch
technology in severe-duty applications.