Quote from the book
"Most manufacturers OTA interviewed had similar expectations for tire rolling resistance
reduction over the next decade. The expectation was that an overall reduction of 30 percent was
feasible by 2005, resulting in normal tires with an RRC of 0.0065 (if the current average is 0.009).
Most also believed the H-rated or V-rated tires would have similar percentage reductions in
rolling resistance so that they would have RRCs of 0.009 to 0.01 by 2005. Very similar
percentage reductions in RRC for light truck tires were also expected. A 30 percent reduction in
rolling resistance can translate to a 5 percent improvement in fuel economy, if the design is
optimized for the tire. Manufacturers were unwilling (or unable) to estimate additional RRC
reductions in the post-2005 time frame, possibly owing to their unfamiliarity with tire
technologies in the research stage at this time.
These 30 percent reductions are expected to be achieved with virtually no loss in handling
properties or in traction and braking. Manufacturers suggested that some loss in ride quality may
occur because of the higher tire pressure, but this could be offset by suspension improvements or
the use of semiactive suspension systems. However, manufacturers expected noise and tire life to
be somewhat worse than those for current tires. Both of these factors are highly important--noise
may represent a special problem because the improved aerodynamics and, possibly, electric
drivetrains of advanced vehicles will reduce other sources of noise."
download advenced automotive technology visions of a super efficient family car
"Most manufacturers OTA interviewed had similar expectations for tire rolling resistance
reduction over the next decade. The expectation was that an overall reduction of 30 percent was
feasible by 2005, resulting in normal tires with an RRC of 0.0065 (if the current average is 0.009).
Most also believed the H-rated or V-rated tires would have similar percentage reductions in
rolling resistance so that they would have RRCs of 0.009 to 0.01 by 2005. Very similar
percentage reductions in RRC for light truck tires were also expected. A 30 percent reduction in
rolling resistance can translate to a 5 percent improvement in fuel economy, if the design is
optimized for the tire. Manufacturers were unwilling (or unable) to estimate additional RRC
reductions in the post-2005 time frame, possibly owing to their unfamiliarity with tire
technologies in the research stage at this time.
These 30 percent reductions are expected to be achieved with virtually no loss in handling
properties or in traction and braking. Manufacturers suggested that some loss in ride quality may
occur because of the higher tire pressure, but this could be offset by suspension improvements or
the use of semiactive suspension systems. However, manufacturers expected noise and tire life to
be somewhat worse than those for current tires. Both of these factors are highly important--noise
may represent a special problem because the improved aerodynamics and, possibly, electric
drivetrains of advanced vehicles will reduce other sources of noise."
download advenced automotive technology visions of a super efficient family car