Mobilis 2008 - A4 : High Pressure Direct Injection of Natural Gas

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Support utilisé lors de l'atelier A4 "L’utilisation du GNV" lors des rencontres Mobilis 2008 (Belfort 18&19 nov 08). Intervenant : David Mumford (WESTPORT INNOVATIONS, Canada)

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Mobilis 2008 - A4 : High Pressure Direct Injection of Natural Gas

  1. 1. Westport Innovations High Pressure Direct Injection of Natural Gas
  2. 2. Westport & Alternative Fuels <ul><li>Westport Innovations is a public company started in 1995 as a spin-off from research at the University of British Columbia </li></ul><ul><li>The company has specialized in alternative fuels, with an emphasis on Natural Gas </li></ul><ul><ul><li>Core technology is High Pressure Direct Injection (HPDI) of natural gas </li></ul></ul><ul><ul><li>Considerable research into Hot Surface Ignition of high pressure natural gas on a diesel cycle engine </li></ul></ul><ul><ul><li>Work also continues with hydrogen Direct Injection (supporting Ford and BMW programs) </li></ul></ul>
  3. 3. Primary Westport Products, Activities, and Partners Mid-Range Truck/Bus Industrial Hydrogen Research Heavy Duty Truck LNG Tanks
  4. 4. HPDI System Common-rail diesel fuel pump hydraulic pump (drives LNG Pump) fuel conditioning module control units (chassis mounted) fuel injectors (under valve cover) LNG tank and pump (chassis mounted) warm, high-pressure natural gas
  5. 5. HPDI Technology <ul><li>Pilot diesel injected just prior to natural gas to provide energy for auto-ignition of gas injection </li></ul><ul><li>Natural gas injected at high pressure at end of compression stroke (no pre-mixed air/fuel) </li></ul><ul><li>Low diesel usage under all conditions </li></ul><ul><ul><li>Average of 6% diesel over vehicle operating cycle </li></ul></ul><ul><li>Diesel Engine Performance remains </li></ul><ul><ul><li>Same high power and torque </li></ul></ul><ul><ul><li>Same or higher efficiency </li></ul></ul><ul><li>Robust combustion over wide range of fuel composition (no premixed air/fuel so no chance of detonation) </li></ul><ul><li>Typical Emission Reductions (Australian Targets) </li></ul><ul><ul><li>30% lower NOx </li></ul></ul><ul><ul><li>60% lower PM </li></ul></ul><ul><ul><li>20% lower GHG </li></ul></ul>
  6. 6. <ul><li>Common-rail style injector </li></ul><ul><li>Directly replaces diesel injector </li></ul><ul><li>Capable of independently injecting diesel and gas at up to 30 MPa injection pressure </li></ul><ul><li>Diesel used as an ignition source, actuation fluid, lubricant, and coolant </li></ul>High Pressure Direct Injection Diesel HPDI
  7. 7. HPDI Trucks

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