quote: Hybrids may rule city/start-stop driving, but a diesel engine is just more efficient than petrol on highways.
quote: I own a 2011 Elantra and EPA says 29/40 MPG however I typically get 25 MPG and I drive 50/50 city and highway
quote: but a diesel engine is just more efficient than petrol on highways.
quote: why didn't they add the hybrid system to a diesel engine?
quote: I wish they had more details about what that couple did to accomplish that incredible feat.
quote: Why didn't they add the hybrid drive to the TDI engine??
quote: The 50-state light-duty vehicle limit for emissions of nitrogen oxides is 0.07 grams per mile. In Western Europe, the limit is 0.29. Reducing NOx to nitrogen and oxygen is much harder with a diesel engine because the exhaust is typically cooler and contains less oxygen compared to a gas engine. To meet U.S. regulations, diesel engines are required to use complicated--and expensive--high-pressure fuel injection and after-treatment systems that in some cases inject an aqueous urea solution to handle the NOx.