CMMS Fleet Maintenance
Software for Fleet, Vehicle, & Equipment Maintenance
190 million barrels per year. Automobiles also are predominantly gasoline-powered, and they
account for almost 200 million barrels equivalent per year. While total elimination of friction
and wear obviously is impossible, eliminating even a small fraction would have tremendous
benefits, and a significant reduction certainly appears to be achievable.
As shown in Figure 3, the largest sources of frictional losses are pistons, rings, and connecting
rods. For heavy-duty vehicles, these components account for 40 million barrels per year; for
light trucks, about 60 million barrels per year; and for automobiles, over 90 million barrels per
year (see Table 5).
Figure 3. Percentage Energy Losses in Various Engine
This Information is Reprinted From U.S. DEPARTMENT OF COMMERCE
National Institute of Standards and Technology
Manufacturing Engineering Laboratory
Factory Automation Systems Division
Gaithersburg, MD 20899