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Old 02-23-2010, 12:46 PM
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Injection system.

In my Diesel class we were going over all different injection systems for marine engines but they are the same as all diesels. is there any online reading about the 7.3 injection system? I know how a diesel injection system works but i want to read more in depth about it. what kind of system does a 7.3 have anyway?
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Old 02-23-2010, 01:32 PM
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Our injection system is somewhat unique. It uses engine oil to drive the injector and force the fuel into the cylinder. This eliminates the need for an injection pump like you've seen on other engines.

You'll see lots of talk here about the HPOP (High Pressure Oil Pump) that takes the engine oil from normal pressures and supplies the injectors with the energy needed to do the direct injection (where higher pressures are needed) over a gas engines simple fuel injection into the head.

The other unique thing Ford (International really) does is this "Split-fire" injection where a small amount of fuel is first injected to start the combustion process. Then while there is some heat & flash in the cylinder already it does a second shot with the full fuel needed and that is more efficiently ignited.

Pretty interesting stuff Do a Google search, there's lots of info out there, it's an old system already...

I got a question....... Does a gasoline engine, with Direct Injection, produce vacuum? OR does it, unlike a diesel, have a throttle plate of some sort that the engine "works against" to produce vacuum?
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