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The opposite of direct injection on diesel motors?

A

Anonymous-0

Well-known Member
Hey folks,
My little tractor has a preheat chamber for the glowplugs (translates to swirl chamber). Any idea what I'm talking about? Some here swear by the system and some wouldn't have it. Any experience from you folks would be interesting. I found a tractor the same series as what I have now with a 4cyl motor and 36HP (which is enough).

Dave
 
Lanova precumbustion chamber is what AC called it. Had lots of purty pictures in the sales brochures. In reality, not so close to Eden...
 
Hello dave2,
Just another design of pre fuel injection system.
Lots of older engines use it.
Caterpillar calls it a preconbustion chamber.
Some time the glow plug is right in the middle of the chamber.
The idea is to get the fire started before injecting the fuel to the cylinder.
Guido
 
its old tecnology!! benifit was is wasn't so noisy and was used in most diesel cars up to about 10 years ago, now we have direct injecion controled by electronics the noise is less and its more effcient as well as cleaner the small diesel cars like the ford fiesta are great, good performance and 60+mpg...
 
Not necessarily better or worse? One thing I see is, if the GP's don't work and you don't have ether, it's "No starty starty GI"

Dave
 
I believe what you have is probably correctly termed a 'turbulence cell'. It's located on one side of the head with the glow plug and the injector is located on the other side pointing at the cell.
A 'pre-combustion' chamber as it's generally known are located in the upper part of the head and the injector and glow plug are both located in the pre chamber. The idea being that it's easier to start a fire in a small area than a large one. In theory. They were also supposed to be better for controlling emissions but I've always been highly skeptical of that claim. Seems those things spew more black smoke than most direct inject engines...
Personally it's not something that I care to have... but I do have a skid steer with a jap prechamber engine. It works fine... but I do prefer open combustion chamber, direct inject engines.

Rod
 
Indirect is not necessarily better or worse . . .just different. The most popular system is the Ricardo Comet, but there are several others also in use. Most USA and Britsh tractors, along with USA cars and trucks during hte 80s-90s used Ricardo Comet. Mercedes had a different system and so did Allis Chalmers with their Buda diesels.

Main drawback to indirect injection is energy loss due to excess heat transfer. Not a big one, though. Indirect diesels need bigger cooling systems then equal-powered direct-injected diesels. My IH tractors (3414, B275, and B414) all have Ricardo Comet systems. So does my Allis Chalmers ED-40. So does my Deere 2010, Chevy 6.2s and Ford-IH 7.3s.
 
Either type of engine can be good. Direct injection is usually easier to start and has better fuel economy. The Kubota in my 94 skid steer is indirect injection and needs glow plugs to start even if it's 25 deg.C outside. It's very good engine but the updated version is direct injection and starts much easier. I also think direct injection has less emissions. Dave
 
lanova system was pretty much junk in my view very hard stating in cold weather fairly low commpression and dont even let it smell the eather can, it will lock up. allis case and oliver all used it on early models
 
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