Newer engines that use DEF have a blue cap on the DEF tank, and most I have ever seen are a plastic tank, not saying for sure that all are though. The new Ford and Chevy diesel pickups are very quiet as well. To help with the emissions, modern diesel engines use a common rail where the fuel pressure last I knew was upwards of 35,000 PSI. Older diesel engines that have an injection pump with a line to each injector separately, give the engine 1 shot of fuel, resulting a a large explosion in the cylinder, causing the classic diesel knock. Now the new engines have all of the high pressure supplied to all of them at the same time through the aforementioned high pressure rail. The computer of the vehicle tells the injector when to open, injecting the fuel into the cylinder. And, last I knew, the tier 4 emission engines were injecting fuel up to 8-10 times per cycle of the engine. Ramping up the amount of delivery as it got closer to TDC, and then ramping back down after that, resulting in many tiny "explosions" in the cylinder, taking the knock out of it and burning the fuel more thoroughly with less "byproduct", or emissions. LOL, there's just a bit of the story , whether you wondered or not
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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