Mr. Jack Keaton reports
WESTPORT UNVEILS ITS PROPRIETARY ENHANCED SPARK-IGNITED NATURAL GAS SYSTEM TARGETING MEDIUM-DUTY TRUCK APPLICATIONS
Westport Innovations Inc. today is unveiling its newest proprietary
technology, the first generation of enhanced spark-ignited (ESI)
natural gas system. Westport's new revolutionary approach to natural
gas combustion technology is designed to provide vehicle and engine
original manufacturers with a downsized natural gas solution
that is cost competitive while providing similar levels of power,
torque and fuel economy to a larger diesel engine. Using 100-per-cent
dedicated natural gas as fuel, Westport's new technology optimizes the
combustion and thermal efficiencies of the engine by taking advantages
of the positive properties of natural gas.
Developed to meet the highest level of OEM quality standards, Westport's
new combustion system and components have been undergoing testing and
offer ready integration into OEM applications globally. Its durability
and reliability levels are expected to meet an OEM's extensive engine
development program. The Westport ESI combustion system is targeted at
subnine-litre engines for Class 6 and 7 truck applications and is also
adaptable for subtwo-litre applications for use in automotive and
non-automotive applications.
"As gasoline and diesel engines progress, it is critical that OEMs offer
natural gas engines that retain their expected performance while
providing the environmental and economic benefits of natural gas," said
Jack Keaton, Westport vice-president of global spark ignited direct injection.
"Westport is taking its technology leadership to the next level by
introducing a long-term technology solution that allows improvements in
engine performance and fuel economy, thus offering highly attractive
operating costs and [a] low emissions profile. As the ESI technology
continues to be developed, Westport will incorporate competitive
performance upgrades to support the longevity of this system."
Key features of Westport ESI natural gas system:
- Optimized for spark-ignited engines:
- Improvements in combustion and
thermal management compared with typical spark-ignited natural gas
engines ultimately enhance the engine's reliability.
-
Designed to provide up to 10-per-cent improvement in power and torque over the
base diesel engine:
- Higher performance from a spark-ignited natural
gas engine compared with a diesel engine potentially allows a four-litre natural
gas engine to replace a six-litre diesel engine, which results in substantial
mass reduction.
- Comparable fuel economy with diesel engine:
- By taking advantage of the
positive properties of natural gas -- for example, natural gas has less
calorific energy compared with diesel -- Westport believes that it is able
to improve the fuel economy of a typical spark-ignited natural gas
engine. In addition, cooled exhaust gas recirculation is applied,
which is a known mechanism for improving fuel efficiency used
extensively in passenger vehicles.
- Designed to provide up to 40-per-cent brake thermal efficiency:
- Brake thermal
efficiency measures how much fuel is converted to useful energy.
Typical spark-ignited natural gas engines have approximately 25-per-cent to 30-per-cent
brake thermal efficiency, and diesel engines have approximately 41-per-cent
brake thermal efficiency.
-
Designed to provide up to 5-per-cent weight reduction compared with the base
diesel engine:
- Weight is a critical element for truck fleets, so any
reduction in engine weight equals an increase in payload.
- Fuel injection:
- The current system utilizes port injection, providing
better cylinder-to-cylinder control of the air fuel ratio. However, it
is designed for upgrades to future technologies.
- Incorporates key Westport engine components:
- This includes the Westport
WP580 engine management system and Westport fuel system components.
- Stoichiometric operation and three-way catalyst aftertreatment:
- Three-way catalysts are effective, simple devices packaged as part of the muffler
that provide consistent emission-control performance and are
maintenance free. By using 100 per cent natural gas, there is no requirement
for diesel-particulate-filter or selective-catalytic-reduction
systems. This allows cost and weight reduction over a base diesel
engine.
- Expected to meet the most rigorous emissions levels:
- Westport ESI is
designed to meet the latest emission regulations, including Euro VI and
United States Environmental Protection Agency 2014 standards.
- Compressed natural gas or liquefied natural gas capability:
- Every natural gas engine burns CNG. Ultimately, the customer will
decide which form of natural gas they wish to carry -- either high-pressure CNG or cold cryogenic LNG -- based on a number of variables,
including, but not limited to, weight of the load, weight of the fuel
storage system, range required by the vehicle and availability of CNG
and LNG.
Westport is currently in various stages of development and negotiation
with several vehicle and engine OEMs for ESI applications in
medium-duty truck and automotive applications.
We seek Safe Harbor.
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