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.
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,
Reducing the environmental impact of hydraulic
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
Model-based design has revolutionized the way products are
developed, with design shifting from parts to the whole.
Digital engineering for Tier 4
With the final phase-in of the U.S. EPA Tier 4 emissions standard
set to take effect by 2015, off-highway engine developers are
accelerating product introductions. Design challenges remain for
manufacturers even after the final phase-in while CAE software
providers improve technology.
Polymeric engine bearings for stop-start
Gaining momentum on passenger vehicles, hybrid and stop-start
technologies are expected to find more application in commercial
vehicles. Mahle has developed a proprietary lead-free polymer
overlay for bearings that's suitable for this aggressive
The big engine that could
With the stringent EPA 2015 regulations on large diesel engines for
locomotive, marine, and stationary generator applications, the need
for NOx reduction via urea SCR catalyst arises given the proven
performance of urea SCR.
Component producers and vehicle service providers offer their views
of hydraulic diagnostics as the industry moves toward real-time,
intelligent health monitoring, predictive failure software
algorithms, and wireless notification.
Engine management expands from minute movements to full
Electronic controls grow in complexity as engine designers extend
their scope to include hydraulics.
Quiet in the cab
As NVH gains importance in the quality of off-highway machines'
performance and operator comfort, it is essential to understand
every aspect of the machine noises and its annoyance effect to the