<story><title>“Super Engine” may fundamentally change the way internal combustion engines work</title><url>http://www.anl.gov/articles/argonne-achates-power-and-delphi-automotive-investigate-new-approach-engines</url></story><parent_chain></parent_chain><comment><author>Torkel</author><text>I&amp;#x27;m assuming the purpose of developing a more efficient engine is to reduce emissions and thus &amp;quot;saving the planet&amp;quot;? That may seem commendable, but from what I have read it is actually a wasted effort, unless you can make it 99%+ more efficient (which you cannot). So, even if this engine is all that it claims (which most other comments here seems to question), it still uses oil and therefore is part of the problem and not the solution. (Wrote abit about this a while back with more references: &lt;a href=&quot;http:&amp;#x2F;&amp;#x2F;torkeldanielsson.se&amp;#x2F;reducing-emissions-is-not-enough&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;torkeldanielsson.se&amp;#x2F;reducing-emissions-is-not-enough&lt;/a&gt;)&lt;p&gt;Edited comment: Man, I don&amp;#x27;t get hacker news... Why do you downvote this? I thought I was adding a valid and important point - that an increase in efficiency is fighting the wrong battle. I even added references via link. I would be super happy if I could be informed of what in this post is offending or off topic!</text></comment>
<story><title>“Super Engine” may fundamentally change the way internal combustion engines work</title><url>http://www.anl.gov/articles/argonne-achates-power-and-delphi-automotive-investigate-new-approach-engines</url></story><parent_chain></parent_chain><comment><author>kenOfYugen</author><text>There is this guy who has made some similar engine prototypes in this field of efficient opposed piston engines.&lt;p&gt;PatOP: Single-Crankshaft Opposed-Piston Engine&lt;p&gt;&lt;a href=&quot;http:&amp;#x2F;&amp;#x2F;www.pattakon.com&amp;#x2F;pattakonPatOP.htm&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;www.pattakon.com&amp;#x2F;pattakonPatOP.htm&lt;/a&gt;&lt;p&gt;OPRE: Opposed piston Pulling Rod Engine&lt;p&gt;&lt;a href=&quot;http:&amp;#x2F;&amp;#x2F;www.pattakon.com&amp;#x2F;pattakonOPRE.htm&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;www.pattakon.com&amp;#x2F;pattakonOPRE.htm&lt;/a&gt;&lt;p&gt;&lt;pre&gt;&lt;code&gt;  &amp;gt; A 500cc two stroke can easily make some 80 Nt*m (8 Kp*m) torque.
  &amp;gt; At 6000 rpm this torque makes some 50 KW (70 PS).
  &amp;gt; 50 KW from 20 Kp means 0.4 Kp per KW.
  &amp;gt; And 0.4 Kp&amp;#x2F;KW with direct injection Diesel efficiency sounds interesting, especially for an engine with such a low cost.&amp;quot;&lt;/code&gt;&lt;/pre&gt;</text></comment>