- back, out from the cylinder,
polluting the
intake manifold with
exhaust.
Early variable valve timing systems used
discrete (stepped) adjustment. For example...
-
engine speeds. A cut open VGT
turbocharger (VW Golf, Diesel)
Exhaust side with
variable-geometry
guide vanes charge air side with
compressor wheel Turbo...
-
sport package With
sport package Without variable exhaust All-season
tires Summer tires With
variable exhaust "Form
meets function: The G70
Shooting Brake...
- red)
Transparent exhaust manifold and
turbo scrolls on a
Hyundai Gamma engine,
showing the
paired cylinders (1 & 4 and 2 & 3)
Variable-geometry turbochargers...
- View
showing engine variable exhaust nozzle...
- fuel injection. Most
versions feature continuously variable cam
phasing on both
intake and
exhaust valves and
electronic throttle control.
Other features...
-
systems are used on
intake and
exhaust camshafts.
Since 2001,
VANOS is
often used in
conjunction with the
Valvetronic variable valve lift system.
VANOS is...
- and
exhaust cams have
three cam
lobes per cylinder. However, the
valvetrain has the
added benefit of
roller rockers and VTC
continuously variable intake...
-
scavenger pumps Variable intake:
butterfly valve in
carbon fibre intake manifold closed at low rpm, open at high rpm
Variable exhaust:
butterfly valve...
- The
engine was
updated in 2005 as the VQ35DE Rev-Up. It
included variable exhaust timing, a
higher rev limit, and a
revised oil pump,
boosting the output...