Not exact matches
The lightweight, alert impression given
at low speeds remains as you start to extend the
engine and
work the simply fabulous carbon - ceramic brakes.
Aside from the slight power increase, chief engineer Dr. Hermann - Joseph Storp says that they
worked on the V - 8's sound quality
at higher rpm; indeed, when it crosses 3000 rpm the
engine emits a muted burble, while
at lower engine speeds it's barely audible.
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.
The gear ratios of the six -
speed transmission allow the
engine to
work more efficiently
at lower speeds, providing the foundation for a spirited driving experience.
The five -
speed manual transmission
works well enough and gives the car a sportier feel, though we wish it had a 6th gear to
lower engine speed while cruising
at higher
speeds.
As with most small capacity, turbo petrol motors, this 1.2 - litre 108bhp
engine has loads of turbo - lag below 2200rpm and you have to constantly
work the gearbox to keep it in the meat of the powerband especially
at low speeds.
A lot of
work was focused on what occurs inside the
engine's cylinders, in a bid to reliably extract more performance and response, and this has also resulted in smoother running
at low speeds.
Port injection
works at low speeds, its quiet operation keeping the
engine from rattling, while the direct injection takes over when the
engine is
working hard, road sounds masking the injector rattle.
Unlike the supercharger that supplies instant boost down
low, the turbocharger
works best
at higher
engine speeds and takes a few milliseconds to make boost.
The Cummins 5.0 L V8 Turbo Diesel in the upcoming 2016 Nissan TITAN XD features a unique Cummins M ² ™ Two - Stage Turbocharger is configured to
work well
at both
low and high
engine speeds.
The
engine has enough torque on the move and responds rapidly to throttle, but the gearing is too high for
low -
speed work (idling along in bumper - to - bumper traffic, for instance, or negotiating street corners
at sensible
speed without dropping back to first).
This allows the CTA system to
work more efficiently
at all
engine speeds and it requires a smaller oil pump, which equates to
lower parasitic energy loss.
In addition, it includes a pulse convertor exhaust that
works by using pressure waves to enhance the torque
at lower engine speeds.
Two of those electric motors are located under the hood and
work in concert with the gasoline
engine, providing power and regeneration
at low speeds, and handling the stopping and restarting of the gasoline
engine as necessary.
Combined — or compounded — the two turbos
work to quickly spool
at lower engine revs but deliver big boost pressures
at higher
engine speeds.
Oversize
engines designed to operate
at low working loads with high efficiency, producing less
engine noise and vibration
at normal cruising
speed.