Mobilis 2008 - A4 : High Pressure Direct Injection of Natural Gas
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Transcript of Mobilis 2008 - A4 : High Pressure Direct Injection of Natural Gas
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Westport InnovationsHigh Pressure Direct Injection of Natural Gas
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Westport & Alternative Fuels
Westport Innovations is a public company started in 1995 as a spin-off from research at the University of British ColumbiaThe company has specialized in alternative fuels, with an emphasis on Natural Gas
Core technology is High Pressure Direct Injection (HPDI) of natural gasConsiderable research into Hot Surface Ignition of high pressure natural gas on a diesel cycle engineWork also continues with hydrogen Direct Injection (supporting Ford and BMW programs)
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Mid-Range Truck/Bus
Industrial Hydrogen Research
Heavy Duty Truck
Primary Westport Products, Activities, and Partners
LNG Tanks
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HPDI System
Common-raildiesel
fuel pumphydraulicpump (drives LNG Pump)
fuel conditioningmodule
control units(chassis mounted)
fuel injectors(under valve
cover)
LNG tank and pump(chassis mounted)
warm, high-pressure
natural gas
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HPDI Technology
Pilot diesel injected just prior to natural gas to provide energy for auto-ignition of gas injectionNatural gas injected at high pressure at end of compression stroke (no pre-mixed air/fuel)Low diesel usage under all conditions
Average of 6% diesel over vehicle operating cycle
Diesel Engine Performance remainsSame high power and torqueSame or higher efficiency
Robust combustion over wide range of fuel composition (no premixed air/fuel so no chance of detonation)
Typical Emission Reductions(Australian Targets)30% lower NOx60% lower PM20% lower GHG
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Common-rail style injectorDirectly replaces diesel injectorCapable of independently injecting diesel and gas at up to 30 MPa injection pressureDiesel used as an ignition source, actuation fluid, lubricant, and coolant Diesel HPDI
High Pressure Direct Injection
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HPDI Trucks