By National Research Council, Division on Engineering and Physical Sciences, Board on Energy and Environmental Systems, Committee on the Assessment of Technologies for Improving Light-Duty Vehicle Fuel Economy
A number of mixtures of commercially on hand applied sciences may possibly tremendously lessen gasoline intake in passenger automobiles, sport-utility autos, minivans, and different light-duty automobiles with out compromising car functionality or protection. evaluate of applied sciences for making improvements to mild responsibility motor vehicle gas economic system estimates the capability gas mark downs and prices to shoppers of accessible know-how mixtures for 3 sorts of engines: spark-ignition fuel, compression-ignition diesel, and hybrid. in accordance with its estimates, adopting the complete mixture of more advantageous applied sciences in medium and big automobiles and pickup vehicles with spark-ignition engines may well lessen gasoline intake via 29 percentage at an extra price of $2,200 to the shopper. exchanging spark-ignition engines with diesel engines and elements might yield gas rate reductions of approximately 37 percentage at an extra price of roughly $5,900 in line with automobile, and changing spark-ignition engines with hybrid engines and parts would scale back gasoline intake via forty three percentage at a rise of $6,000 in keeping with motor vehicle. The publication makes a speciality of gasoline consumption--the volume of gas fed on in a given using distance--because power rate reductions are at once relating to the volume of gas used. by contrast, gas economic system measures how a ways a motor vehicle will commute with a gallon of gas. simply because gasoline intake info point out funds stored on gasoline purchases and rate reductions in carbon dioxide emissions, the ebook unearths that motor vehicle stickers should still supply shoppers with gasoline intake info as well as gas economic system details.
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Additional resources for Assessment of Fuel Economy Technologies for Light-Duty Vehicles
For example, a 6-speed automatic transmission replaces a 5-speed, a compression- • • • 2 Learning by doing represents the increase in productivity and decrease in cost that occurs during a technology’s lifetime as a result of manufacturers’ gaining experience in producing the technology. The impacts of learning on costs can be represented as a volume-based learning where costs reductions occur with increasing production levels or as a time-based learning where cost reductions occur over time. • ignition (CI) engine replaces a spark-ignition (SI) engine, or a set of low-rolling-resistance tires replaces a set with higher rolling resistance.
Tires and tire pressure. Test tires and pressures do not generally match in-use vehicle operation. • Wind. There is no wind in the EPA certification testing. • Cold start. There is no cold start in the EPA CAFE certification testing. • Turns. There is no turning in the EPA certification testing. The measurement of the fuel economy of hybrid, plugin hybrid, and battery electric vehicles presents additional difficulties in that their performance on the city versus highway driving cycles differs from that of conventional vehicles.
The relevant measure of cost is the change in RPE in comparison to an equivalent vehicle without the particular fuel economy technology. More often than not, a fuel economy technology replaces an existing technology. For example, a 6-speed automatic transmission replaces a 5-speed, a compression- • • • 2 Learning by doing represents the increase in productivity and decrease in cost that occurs during a technology’s lifetime as a result of manufacturers’ gaining experience in producing the technology.