Tony D Posted October 7, 2011 Share Posted October 7, 2011 It's 'free' if you are using energy that is usually wasted (heat and velocity) to induce the amplification flow. An engine's exhaust on the way out the tailpipe is about as far down the 'work' ladder as you can get. Once it's out the pipe, you can never recover ANYTHING from it ever again. Why not use that last bit of heat and velocity energy to scavenge the surrounding airflow into a dilution scheme to mitigate fumes at least??? Caterpillar last year revealed an auxillary turbo-like device that takes a turbine wheel downstream of the turbocharger outlet, which turns through a geared reduction box and fluid coupling (like a torque converter) to impart exhaust gas energy back to the flywheel. It was between a 1 to 3% recovery. Doesn't seem like much, but it was money down the drain as wasted exhaust flow. Quote Link to comment Share on other sites More sharing options...
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