Advancing technology can keep conventional engines humming for decades.
Combustion engines won't completely disappear any time soon, if ever. Certain transportation tasks or operating environments simply don't lend themselves to- or hydrogen-powered electric propulsion. A century and a half of research and development has greatly increased the efficiency of combustion engines, and engineers have loads of additional tricks up their sleeves that promise to extract even more work from a molecule of fuel while producing even fewer harmful emissions.
represents a sweet spot, above which producing/refining the fuel consumes more energy, decreasing the well-to-wheels energy/CO2 benefit.improves efficiency during less extreme driving situations by making a few cylinders work Davis Dam hard while the others do nothing. Dynamic Fuel Management can shut off any or all cylinders in GM's 5.3- and 6.2-liter V-8s to boost EPA fuel economy by up nearly 12 percent.
, where a smaller fuel efficiency payoff pays huge NOx dividends by maintaining exhaust temperatures needed to keep catalysts lit.An engine's power is limited by the amount of air it can ingest, which is why crankshaft-powered superchargers and exhaust-powered turbochargers were developed more than a century ago. Electric superchargers using recovered energy power the the
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