Westport™ HESI 1.0 offers a revolutionary approach to diesel-engine-derived natural gas combustion technology. It builds on the simplicity of stoichiometric natural gas combustion with cooled EGR and 3-way catalyst to deliver the same power, torque, and fuel economy of a larger diesel engine with reduced complexity and cost. Westport™ HESI 1.0 technology does this by removing the constraint of carrying over the diesel engine cylinder head, which was not designed for Otto-cycle spark-ignited combustion. By re-architecting the combustion chamber geometry, developing a unique cylinder head based on proven techniques use in state-of-the-art gasoline engines, and combining it with the robust bottom end of the diesel engine, the combustion and thermal management of the engine can be fully optimize to take full advantage of the ultra-high octane properties of natural gas.
Westport™ HESI 1.0 is targeted at sub 10L engines for medium-duty truck applications and is also adaptable for use in light-duty automotive and non-automotive applications.
Westport’s next generation HESI technology is a solution that reduces transportation costs while meeting both climate change and urban air quality challenges by offering ultra-low emissions and operating on cost effective, low carbon and renewable fuels.
According to the Global Transportation Energy and Climate Roadmap (International Council For Clean Transportation, 2012), in the absence of policies to reduce emissions, well to wheels CO2 equivalent emissions from heavy duty vehicles are expected to more than double from year 2000 levels by 2030. Even with the policy actions in the pipeline, emissions are expected to grow significantly from 2010 to 2030.
Couple this with the challenge of increased urbanization and ultra-low vehicle emissions solutions for cities will become increasingly important to maintain or improve air quality and public health.
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The Maruti Suzuki WagonR S-CNG has emerged as the highest selling natural gas vehicle in the country, as this greener and safer factory-fitted CNG model has surpassed 300,000 units in sales.
While much attention has shifted to the potential for battery-electric or hydrogen vehicles, another technology with a vast infrastructure — renewable natural gas — is gaining traction among fleet managers.
Egypt has launched an ambitious plan to shift the primary fuel for vehicles in its jurisdiction from petrol and diesel to compressed natural gas.
Natural gas vehicles (NGV) may get a boost as power markets and renewable equipment production are seen as potential casualties.