The transmission efficiency and wide ratio spread improve fuel economy by
operating at a lower engine rpm in both city and highway environments.
Compact and lightweight, the transmission is designed to withstand maximum torque values up to 350 N · m. With six gears, the transmission is designed to
operate at a low engine rpm to provide maximum fuel economy.
Not exact matches
The overdrive gear allows the
engine to
operate at lower rpm while maintaining the given vehicle speed, thus requiring less fuel because the
engine is doing less work.
Though the literal power band covers most of the
operating RPM range, particularly in first gear (as there is no
lower gear to shift down to, and no «flat spot» in which the
engine does not produce any power), the effective band changes in each gear, becoming the range limited
at the upper end by either the limiter, or a point roughly located between peak power and the redline where power drops off, and
at the
lower end the
engine's idling speed.
The switch - down back from high to
low RPM cams is set to occur
at a
lower engine speed than the switch - up (representing a hysteresis cycle) to avoid a situation in which the
engine is asked to
operate continuously
at or around the switch - over point.
It offers expanded valve opening angles (Wide) which enables the
engine to
operate in a modified - Atkinson cycle
at low rpm for improved economy and
lower emissions, and in the Otto cycle
at high
rpm for better performance, while delivering high torque throughout the
rpm band.
When
operating at lower rpm, the new
engine uses less fuel.
With a two - speed system, the higher gear allows the e-motor to
operate at a
lower and more efficient
RPM at high driving speeds, using the same principles as a conventional gearbox with a combustion
engine.
While
operating on
engine alone, the Panamera S e-Hybrid seemed more than content to putt around
at 100 km / h in eighth gear
at a very
low 1,900
rpm.
By
operating the
engine at higher load and
at lower rpm, optimal efficiency can be obtained.
The pump is programmed to
operate as needed, staying in
low - pressure mode
at rpms below 3,500, and then bumping up pressure as demand follows
engine speed.