This is SO NEW.. why did we not think of this?
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Do I detect some sarcasm here...the headline should have the important words Homogenous Charge in front of compression ignition, vastly different from our engines
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Model "diesel" engines (which don't run on diesel nor have a fuel injection system) are HCCI.
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I remember reading an article in a magazine (I think it was Popular Mechanics) back in the 90s regarding the development of compression-ignition petrol engines. The problem then (and I assume still applies now) was the generation of NOx due to the lean burn. Diesels are being slammed for their NOx production, the original Honda Insight with it's lean-burn engine was killed off due to NOx production, and I see nothing mentioned in the article how they're dealing with NOx...
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So to me they're basically running it lean and using a controlled form of detonation (spark ignites the fuel partly and causes a pressure and heat spike to ignite the rest of the charge?) wonder how strong the internals are. Not as strong as a real diesel I'd imagine. |
I wonder,this gasoline does not lubricate like diesel, so I don't expect million mile motors.
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And remember, a diesel " car " isn't any different than a gasoline " car " so don't expect the " car " portion to last any longer just because it is a diesel. |
This reminds me how formula 1 cars are starting to use pre chambers in their engines in order to run an air fuel mixture that is as lean as possible.
As the price for fuel goes up, lean air fuel mixes for gasoline cars will soon be king of the road, since they are very efficient. Then again, I'd imagine the cost of producing such engines to be more expensive than the regular gasser... |
The Honda CVCC (Compound Vortex Controlled Combustion) ran pre chambers and an extra intake valve to inlet a fuel rich mixture as needed. A friend had one and I dont ever remember him at a gas station with it. I had a 1972 Newport and was at the gas station quite a bit.
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I had an old ALL CAST IRON Briggs and Stratton engine which was used on a David Bradley walking tractor which used a prechamber....it was a gas engine....Even the Flywheel with fins was cast iron...
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Some 80's Mitsubishi 4 cylinders ( also found in Chrysler products ) used the same process called MCA Jet. It is far easier to light off a rich mixture than a lean one. On the Mitsu it really isn't a pre chamber, it is a nozzle that directs a small amount of a rich mixture towards the spark plug that is in the standard location. |
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So did the Honda cvcc run a rich fuel mixture in the prechambers, while the combustion chamber was extremely lean? Causing the spark from within the prechamber to ignite the cylinder? Funny how such "groundbreaking" technology has been around for ages, it's just that now we're able to hone in these combustion processes at very precise levels. Nobody is reinventing the wheel, just making sure it can roll a little bit better...
I've also read articles that stated cost of emission control devices will go up if these powerplants are implemented in mass. |
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