<story><title>How a Car Engine Works</title><url>http://jacoboneal.com/car-engine/</url></story><parent_chain><item><author>sitharus</author><text>It&amp;#x27;s worth noting that the engine illustrated is a gasoline direct injection engine, which are fairly common on new cars but historically not so.&lt;p&gt;Until the early 2000s most fuel injected gasoline engines were multi-point injection - the fuel was injected in to the incoming air stream immediately before the cylinder, and before that indirect injection which injected where the carburettor was.&lt;p&gt;Then there are carburettor engines.&lt;p&gt;Most diesel engines have been direct injection for many decades now, due to the behaviour of the fuel.</text></item></parent_chain><comment><author>jcampbell1</author><text>Direct injection implies the fuel is injected at the top of compression stroke, but the animation shows the fuel being added during the intake stroke.  This is just an inaccurate drawing showing the injector attached to the cylinder rather than the intake manifold.&lt;p&gt;Interestingly, this could be a drawing of a ultra modern gas direct injection system running in classic mode.  Ford&amp;#x27;s EcoTech will, under certain conditions, operate like this picture, though I am sure that is not what the author had in mind.</text></comment>
<story><title>How a Car Engine Works</title><url>http://jacoboneal.com/car-engine/</url></story><parent_chain><item><author>sitharus</author><text>It&amp;#x27;s worth noting that the engine illustrated is a gasoline direct injection engine, which are fairly common on new cars but historically not so.&lt;p&gt;Until the early 2000s most fuel injected gasoline engines were multi-point injection - the fuel was injected in to the incoming air stream immediately before the cylinder, and before that indirect injection which injected where the carburettor was.&lt;p&gt;Then there are carburettor engines.&lt;p&gt;Most diesel engines have been direct injection for many decades now, due to the behaviour of the fuel.</text></item></parent_chain><comment><author>elnate</author><text>The other difference is Diesel engines ignite the fuel by compressing it rather than with a spark.&lt;p&gt;(Also Diesel is the engine type not the fuel &lt;a href=&quot;http://en.wikipedia.org/wiki/Diesel_engine&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Diesel_engine&lt;/a&gt;)</text></comment>