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rv:diesel [2023/08/31 02:06] princess_fluffypants [Known Good Engines] |
rv:diesel [2023/08/31 02:09] princess_fluffypants [Exhaust Soot] |
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===== Exhaust Soot ===== | ===== Exhaust Soot ===== | ||
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- | Diesels put out a ton of soot, this is what gives diesel exhaust its characteristic big black clouds when under heavy load. To get rid of it, manufacturers use a particulate trap that collects the soot and uses extra-injected fuel to burn it away in a process that that can go over 2800 degrees. This works okay in vehicles that are driven hard all the time, like semi-trucks (Well the chambers eventually plug up, but it takes a while). | + | Diesels put out a ton of soot, this is what gave pre-emission |
But passenger vehicles’ light duty cycles don’t allow for automatic burning, so sometimes they have to perform forced burn cycles when the vehicle is parked. This uses a ton of extra fuel and upsets the owner, who doesn’t understand why their vehicle is running at a fast idle by itself and has superheated exhaust pouring out the back. Some early light trucks actually caught their plastic rear bumpers on fire. | But passenger vehicles’ light duty cycles don’t allow for automatic burning, so sometimes they have to perform forced burn cycles when the vehicle is parked. This uses a ton of extra fuel and upsets the owner, who doesn’t understand why their vehicle is running at a fast idle by itself and has superheated exhaust pouring out the back. Some early light trucks actually caught their plastic rear bumpers on fire. | ||
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These chambers also get plugged up easily, [[https:// | These chambers also get plugged up easily, [[https:// | ||
- | To top it off, some early light diesels did a terrible job integrating the extra fuel delivery required - instead of adding an extra injector, they just cheaped out and had the last injector in the engine shoot extra fuel during the exhaust stroke, which caused internal engine issues (The 6.4L V-8 used in the [[rv: | + | To top it off, some early light diesels did a terrible job integrating the extra fuel delivery required - instead of adding an extra injector, they cheaped out and had the last injector in the engine shoot extra fuel during the exhaust stroke, which caused internal engine issues (The 6.4L V-8 used in the [[rv: |
===== Fuel Injection | ===== Fuel Injection | ||
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===== Looking forward | ===== Looking forward | ||
- | Over time as manufactures have figured out what works/ | + | Over time as manufactures have figured out what works/ |
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+ | However for light-duty cycles such as seen in vans and consumer-oriented trucks, we can expect to see manufacturers realizing that diesels no longer make sense outside of perhaps the largest 1+ ton trucks. |