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Comment: Re:Cool, but... (Score 1) 379

by 3waygeek (#31418364) Attached to: 50% Efficiency Boost From New Fuel Injection System

Those issues can be addressed by particulate filters and urea injection, as the current diesels from VW/Audi, BMW and Mercedes demonstrate. I'm familiar with the VW/Audi technology, having just bought an A3 TDI -- their 2.0l TDI engine uses a particulate filter & is 50-state legal. Their larger engines use urea injection, as do the BMW/Mercedes -- the urea reacts with NOx to produce CO2 and NH3 -- the NH3 is subsequently catalytically reacted to produce N2 and H2O.

Comment: Re:NOx and emissions? (Score 1) 379

by 3waygeek (#31418268) Attached to: 50% Efficiency Boost From New Fuel Injection System

NOx can be handled the same way it is in the newer "clean diesel" engines -- either through particulate filters or selective catalytic reduction (SCR -- basically injecting urea into the exhaust stream to convert the NOx into CO2 and NH3, which is then converted catalytically to N2 and H2O).

Never test for an error condition you don't know how to handle. -- Steinbach

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