KDog Trucking Posted April 16, 2018 Share Posted April 16, 2018 I read an article about a variable compression engine, with the statement that this technology could kill the diesel engine. It's basically a gas engine that can change it's compression ratio on the fly. (Ranges from 8:1 all the way up to 14:1). "The ingenuity of VC-T engine technology lies in its ability to transform itself and seamlessly raise or lower the height the pistons reach. As a consequence, the displacement of the engine changes and the compression ratio can vary anywhere between 8:1 (for high performance) and 14:1 (for high efficiency). The sophisticated engine control logic automatically applies the optimum ratio, depending on what the driving situation demands." Just thought this was cool and wondering for anyone who has a deep understanding of mechanical workings, is this really a breakthrough that could threaten the diesel engine or is this just hype? The full article can be found here: https://jalopnik.com/worlds-first-variable-compression-ratio-engine-could-ki-1785295848 Quote Link to comment https://www.bigmacktrucks.com/topic/53118-the-worlds-first-variable-compression-ratio-engine-could-kill-diesel-forever/ Share on other sites More sharing options...
Rob Posted April 16, 2018 Share Posted April 16, 2018 Been talked about and worked with for over 30 years I know of. Don't see it in the marketplace yet so I'm going to abstain from true belief at this point. 2 Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/53118-the-worlds-first-variable-compression-ratio-engine-could-kill-diesel-forever/#findComment-396773 Share on other sites More sharing options...
Mack Technician Posted April 16, 2018 Share Posted April 16, 2018 Can’t imagine them reaching the torque per pound ratio. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53118-the-worlds-first-variable-compression-ratio-engine-could-kill-diesel-forever/#findComment-396804 Share on other sites More sharing options...
HeavyGunner Posted April 16, 2018 Share Posted April 16, 2018 We don’t have good enough gas to run 14:1 either. 2 Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment https://www.bigmacktrucks.com/topic/53118-the-worlds-first-variable-compression-ratio-engine-could-kill-diesel-forever/#findComment-396837 Share on other sites More sharing options...
KDog Trucking Posted April 17, 2018 Author Share Posted April 17, 2018 Good points. I guess I'll still have a job for a while longer. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53118-the-worlds-first-variable-compression-ratio-engine-could-kill-diesel-forever/#findComment-396910 Share on other sites More sharing options...
Mack Technician Posted April 17, 2018 Share Posted April 17, 2018 To get the torque they would have to be able to add fuel to the cylinders, when the valves are closed, to shape the cylinder pressure when the crank and rod are at 90 degrees. Doesn't look like they have done anything but make a heavy engine. Clever idea though. Quote Link to comment https://www.bigmacktrucks.com/topic/53118-the-worlds-first-variable-compression-ratio-engine-could-kill-diesel-forever/#findComment-396926 Share on other sites More sharing options...
Mack Technician Posted April 17, 2018 Share Posted April 17, 2018 1 hour ago, kamp_dogg said: Good points. I guess I'll still have a job for a while longer. We're going to be burning liquefied dinosaur brains well into your retirement. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53118-the-worlds-first-variable-compression-ratio-engine-could-kill-diesel-forever/#findComment-396927 Share on other sites More sharing options...
james j neiweem Posted April 17, 2018 Share Posted April 17, 2018 Looks like more parts and pieces. Quote Link to comment https://www.bigmacktrucks.com/topic/53118-the-worlds-first-variable-compression-ratio-engine-could-kill-diesel-forever/#findComment-396933 Share on other sites More sharing options...
KDog Trucking Posted April 18, 2018 Author Share Posted April 18, 2018 I agree the number of moving parts/gears and potential for things to go wrong seems to be much greater in this more complex design. The youtube videos (1-4) were really good and help you to see how they are achieving this. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53118-the-worlds-first-variable-compression-ratio-engine-could-kill-diesel-forever/#findComment-397022 Share on other sites More sharing options...
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