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ive been 'gas' engine mechanic many years, now am reponsible to fix case 580 backhoe, this pump blows my mind, nothing like it on a gas engine, anyone who works on these has to be very intelligent, or something extraordinary, i dont understand why or how it is so complex and dificult to work on. what do i tell my boss? how long will it take to pull the pump and put it all back together?
That is a cool cross section of a supercharger, good to see what is going on inside. One correction though, air is trapped between the lobe and the inner wall of the supercharger body and travels around the outside, so the direction the supercharger is being spun here should be the other way.
You are 100% correct. Normally the eccentric cam that operates the mechanical fuel feed pump is part of the injection pump camshaft, unfortunately that particular eccentric cam is not illustrated in this model injection pump.
How does such an engine advance its timing, under light load or high speed? Like old-fashioned petrol engines, using vacuum or centrifugal advance. I can't see any way to do it. The injector camshaft is fixed.
It’s fixed. Like the 12 valve Cummins with a Bosch p7100. Factory is around 12.5 degrees for easy starting. For higher performance And efficiency more advanced timing is used. Downside is harder cold starts.
The injector timing is controlled by shims between the injector pump block which carries the injector pumps. Putting the pumps closer to the cam causes the pumps to raise pressure sooner in the cycle. More shims lifts the pumps away from the cams and retards the build of fuel pressure in the rotation cycle. The governor increases or decreases fuel delivery based on engine speed caused by load.
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Looks fantastic! You really know how to cut these machines up professionally. This could be a great exhibit in any university or community college, or science museum... Best, Paul
Hello Paul. Thank you for your feedback! This is one of our largest complete technical engines. Many agriculture and heavy-duty technology programs value this type of educational presentation.
Hello wasim6900. You are correct. The video is that of a BMW 6-Cylinder Gas Engine with Multipoint Electronic Injection. We are showing this engine as an example of what we offer for the L-Jetronic and K-Jetronic Injection. Thank you for you comment.
