Bedlam wrote:
How many of you remember when the EPA started messing with gasser emission standards in the 70's? It wasn't just the smog pumps - People were peeved when carburetors were sealed to prevent rejetting or adjustments (you couldn't even get in to clean or rebuild them) and then the first generation of throttle body fuel injection started appearing. This eventually was better than the carburetors it replaced but is still a crude way to deliver fuel. Direct injection will help clean up the gasser, but I wouldn't be surprised to see EGR, DPF or even DEF work its way into the gassers as emissions get more stringent. At some point the complexity of any cleaner burning ICE will become costlier than electric vehicles even if the net emissions are the same or less than an EV.
Gas engines have used EGR for 40+ years. They do not need particulate filters, because they produce little or no soot. NOX reduction has already been figured out with no tacked-on urine-injection systems.
