Gallery: GM’s Next-Gen Engine Boosts Fuel Efficiency by 15%


There’s little good news coming out of the American auto industry these days, but here and there we’re seeing glimmers of hope from major car manufacturers. GM has announced that it is developing a more efficient combustion engine that is designed to improve the performance of its vehicles by almost 15%. Dubbed the HCCI, the next generation engines work by compressing fuel rather than igniting it with a spark plug, resulting in both reduced gas consumption and increased mileage.

GM’s new engine employs a technology called homogeneous charge compression ignition. Unlike standard engines, which runs thanks to the spark generated by a battery, the engine compresses a mixture of fuel and air to ignite it. The HCCI engine is particularly useful for hybrid vehicles, as it is most efficient while the vehicle is being driven at high speeds for long periods of time.

GM believes that these engines are going to be necessary for the next generation of hybrids, and will help to ease the transition towards fully electric vehicles. The auto manufacturer already has a number of prototype vehicles running on this engine, and they are currently fine-tuning it for widespread release. General Motors is not the only vehicle manufacturer working on an HCCI engine – Mercedes Benz, Ford, Volkswagen and Honda are working on similar technologies.

+ General Motors

Via Wall Street Journal


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  1. stan131 May 12, 2010 at 3:32 pm

    missing the point….
    15% eff. improvement is not something to be snide about. Nor is an gasoline engine that somehow manages to control “detonation” and not end up with holes in the pistons, that’s actually pretty neat.

  2. antkm1 August 12, 2009 at 1:50 pm

    Good job GM, NOT! Look at VW’s diesel and get back to us when you’re operating in this century! Not that VW is anything to praise for being eco-friendly but at least they’re trying. This GM thing is cop-out!

  3. bryan June 1, 2009 at 5:40 pm

    … gm for the win. i invented a tube that lights up with electricity.

  4. scrogbot May 27, 2009 at 4:16 pm

    yup, that’s a diesel engine GM has “invented “in 2009. lets bail them out some more!

  5. iceburg May 26, 2009 at 3:38 pm

    Isn’t this basically a diesel engine? I guess the key issue is that they have applied diesel technology at higher pressures so that it works with gasoline.

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