Quote:
Originally Posted by Jffeijao
This has been done. Many EGR recalls and an SIB on intake clean up have been released. Issue is caused by low fuel quality allied with very tight NOx emissions limits in US.
All the discussion about alternatives to stop CBU are measures to throw in the atmosphere the un treated diesel burn by products. They are all against the law.
The reality is: all direct injection engines require carbon build up removal as preventive maintenance. With the low grade US fuel some applications will require a smaller interval between clean ups.
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It is my belief that overly strict NOx emissions requirements are due almost exclusively to the Los Angeles Valley in California being such a "smog trap" as there is evidence that during Native American times, smoke from fires would literally darken the air in the valley.
As a result of ignoring diesel engine advantages in all other aspects of air pollution, including small particulates as it turns out, we are saddled with a poorly conceived and executed public sanction against diesel engines. The lack of spine many politicians have against ill thinking environmentalists has arguably contributed to pollution and CO2 emissions more than if diesels had not been forced to comply with regulations designed for gasoline vehicles.
Removing our ability to cut NOx emissions would hardly make a difference, but if the tuning is right, could improve other aspects of diesel emissions now harmed by the poorly conceived regulations.
PL