Ask An Engineer: Natural Gas For Dummies

Westport Innovations has just signed a second deal with General Motors to produce light duty natural gas engines, and it’s probably not the last time we’ll be seeing these kind of partnerships forming. Natural gas vehicles have been explored previously on TTAC, but the technology hasn’t been fully explored in-depth, aside from some well-informed comments in various articles.

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Ask An Engineer: GDI Problems In A Nutshell

“Ask an Engineer” is hosted by Andrew Bell, a mechanical engineer and car enthusiast. Andrew has his MASc in Mechanical Engineering from the University of Toronto, and has worked on Formula SAE teams, as well as alternative fuel technologies in Denmark and Canada. Andrew’s column will explore engineering topics in the most accessible manner possible.

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  • Lou_BC Fire Fain? The only way to "fire" an elected official is at the ballot box or with better aim.
  • AZFelix This article does not appear to address non-functional exhaust tip segments attached to the muffler body. When stopped behind certain cars (especially at night), I have noticed that in some cars with dual tips projecting from a single muffler unit, one is fake. The functioning one is dark and sooty while the other has a clean and shiny inside with the solid back panel of the muffler being visible. I have seen this on a Camry and possibly an Accord and BMW if I recall correctly, and am certain these were all OEM exhausts. Feel free to chime in with other confirmed sightings. I also recall reading somewhere that Ford designed an exhaust system where the gasses were vented downwards through a hole proximal to the end of the tail pipe. This prevents discoloration of the metal and soot from building up on the exhaust tips. It was done to address complaints from owners.
  • Ajla Fair enough. He could have used more precision in his words.
  • ToolGuy I AM PLACING [sic] NICELY. There is NO NEED TO BAN ME. Personally I do lots of things which DON'T MAKE SENSE, sometimes to myself, often to others. WHO ELON MUSK ENDORSES is really kind of NONE OF MY BUSINESS. It is a FREE COUNTRY, in some ways, still. I wish I knew how to FORMAT MY COMMENT better. I USED TO KNOW HOW, maybe I am losing it slowly (lot of that going around, JUST SAYING).
  • Aja8888 I can't read those whole thread without throwing up....