What does dci engine mean?

Answer 1

An engine with DCI has Direct Common-rail Injection. It evolved from both the Direct Injection systems many cars have today and the Common Rail system designed in the 60's with the first working and mounted system made in Japan by Denso and installed on the Hino heavy duty truck.

Direct Injection systems delivery pressurized fuel directly into combustion chambers allowing for more effective and effient ignition and allowing the auto industry to begin using turbo chargers on higher compression engines such as the turboed Cobalt SS from 09 that has 9.2:1 compression and, with the installtion of stage 1, can push around 15-20 lbs of boost, something we could only wish for in the 80's and 90's.

The DI systems feed the pressurized fuel through a single line to the injectors that feed directly into the chambers as opposed to dumping the fuel into the ports in the intake manifold and letting the air flow carry it through the final twists of turns to reach the head's ports then to finally arrive in the appropriate chamber.

DCI takes this one step further. Rather than sending pressurized fuel down the fuel constantly, DCI sends the fule to the Common-rail where it is pressurized to the appropriate amount. From there an array of sensors work with the CPU to map just how much of the highly pressurized fuel needs to go into which chamber at what point in time to get the maximum amount of ignition and power out of the fuel/air mix. Once it's time, the computer directs the appropriate injector to open and squirt what is essentially atomized fuel into the chamber where it almost immediately closes off and ignites to end that cylinders power stroke and move to the next.

With DI and DCI systems, we now get far more efficient combustion which translates into less vapor escaping with the exhaust as well as maximized power potential from seemingly 'flawless' ignitions. We are also capable of increasing the compression ratio of engines; which also increases efficiency and effectiveness of fuel consumption, ignition and power generation all of which, again, innately reduces emmissions since the more efficient the ignition and the more complete the burn, the more inert emissions there are and the less active emissions which are the emissions we want to tro to reduce.

I'll be honest with you, I had to do a little searching to find out what exactly DCI is. There were lots of mentions of Diesel xxx xxx and the like. However, these all were talking about the Common Rail system that has been used since the 90's. DCI, however, is not a fuel specific system, it is valid for use with both diesel and gasoline/petrol.

Hope this helps.