With respect to «ivtec» specifically, it continuously controls
the timing of the intake valve.
A standard VVTi alters
the timing of the intake valves only and not the valve lift.....
VVT - i, introduced on the 1JZ - GTE / 2JZ - GTE engine in 1996, varies
the timing of the intake valves by adjusting the relationship between the camshaft drive (belt or chain) and intake camshaft.
In addition,
the timing of the intake valves is staggered and their lift asymmetric - creating a swirl effect within the combustion chambers.
The 4B11 2.0 - liter inline - 4 has been fitted with the Mitsubishi Innovative Valve timing Electronic Control system (MIVEC) to maximize power production, improve fuel efficiency and reduce exhaust emissions by continuously varying
the timing of the intake valves according to engine speed when it operates in Parallel Hybrid mode (the engine functions solely to generate electricity in Series Hybrid mode and is mainly used to provide motive force in Parallel Hybrid mode).
Starting from minimal intake - valve lift (i.e. idling), an increase in engine load causes the lift and
timing of intake valve 1 to increase faster than that of valve 2.
This Atkinson cycle - type engine reduces pumping loss by delaying the close
timing of the intake valve in the compression stroke, therefore maximizing the expansion ratio — it is the only Atkinson cycle engine to be combined with multi-port injection in the compact class.
Not exact matches
Some octopuses — and only some — will spend
time blowing pill bottles around their tank with their jet, «bouncing» the bottle back and forth on the stream
of water coming from the tank's
intake valve.
There should be a hardening
of engine note and a surge
of power as the revs rise; if not, then something is amiss with either the VTEC variable
valve -
timing and lift system or the VVIS variable - geometry
intake plumbing.
With Valvetronic variable
valve lift, VANOS variable
valve timing, and a three - stage
intake manifold, the 3.0 - liter engine in the 330i makes 255 hp at 6600 rpm, with 220 lb - ft
of torque at just 2750 rpm, up from 225 hp and 214 lb - ft in the outgoing 330i.
The naturally aspirated 6.5 - liter V - 12's revised variable
intake and
valve timing contribute 39 extra horsepower for a total
of 730.
This is Kia's second - generation Lambda V - 6 (the first was a 3.5 - liter displacement) and it makes use
of direct injection, dual continuously variable
valve timing, a three - phase
intake manifold that optimizes torque across a wide range
of engine speeds, and a unique downpipe that helps reduce the sounds
of the exhaust.
Hopefully not confusing the issue, I will tell you that the
intake valve remains open for a short
time during the beginning
of the compression cycle, as well as the exhaust
valve opening before the piston gets to the bottom
of the combustion cycle, but specifics
of why this happens is probably best left for another writ.
Direct fuel injection, nearly equal bore and stroke dimensions, a 10.0:1 compression ratio, variable
valve timing (
intake and exhaust), and a peak turbo boost
of 11.6 psi yield impressive output figures: 450 lb - ft
of torque at only 1750 rpm and 400 hp at a hearty 6400 rpm.
As it turns out, the three - cylinder configuration not only makes a bigger bang but also the exhaust scavenging from the combustion chamber is better, which improves both the efficiency
of the variable
valve timing (featured on both the
intake and exhaust side) and the ability
of the tiny, 1.5 - inch impeller
of the turbocharger to spool quickly up to its maximum speed
of 248,000 rpm.
You would never push part
of the new
intake charge through the exhaust
valve opening because the cylinder would be under vacuum at the
time.
Improvements include the addition
of variable
valve timing and an active short / long runner
intake.
Shell V - Power NiTRO + Premium Gasoline, with seven
times the cleaning agents required to meet federal standards, removes an average
of 60 %
of harmful
intake valve deposits left behind by lower quality premium gasoline, starting with the very first tank *.
We can probably assume that this engine was not one
of the original Gen III V - 10s, though, because it has DOD (Displacement on Demand — cylinder deactivation on the passenger bank that turns the V - 10 into an inline 5 - cylinder for fuel mileage) and VVT (variable
valve timing) like the Gen IV engines as well as an LS3 / L92 - style rectangular [
intake] port and [D - port exhaust] head.
Sequential Multi-port Electronic Fuel Injection (SEFI) Specific type
of multi-port injection that delivers fuel in more precisely
timed pulses corresponding to the opening
of each
intake valve, SEFI takes advantage
of the atomized fuel spray from the injectors to achieve a more precise combustion for better performance, often with improved fuel economy.
Specific type
of multi-port injection that delivers fuel in more precisely
timed pulses corresponding to the opening
of each
intake valve.
Rated at 278 hp and 265 lb - ft
of torque, it features direct and port injection, variable
valve timing with intelligent wider
intake — which means it uses the Atkinson cycle at cruising speed for better fuel efficiency and switches back to Otto - cycle when torque is necessary — and variable
valve timing with intelligent exhaust.
This involved hours
of painstaking work on the bench, balancing combustion chambers and
intake ports, gas - flowing the ports and developing a new camshaft to extend the
valve - opening
times.
The power improvement comes from a revision
of the turbo's compressor housing and a more aggressive muffler, and the power delivery is kept somewhat more linear through variable
intake valve timing / phasing.
Variable camshaft
timing helps maximize fuel economy by reducing the engine's pumping work via a delayed closing
of the
intake valve, which increases the expansion process
of the combustion event.
This aluminum - block engine is aided by i - VTEC, which takes Honda's system
of variable
valve timing and lift one step further: It makes the phasing
of the
intake camshaft completely variable across the rev range to increase power, improve fuel economy and reduce emissions.
Few
of the features comprises
of petrol particle filter, a twinscroll turbo, exhaust
valve timing, variable
intake, variable
valve intake drive, along with 200bar fuel injection pressure and stop & start system.
«VVT» stands for «Variable
Valve Timing,» a process implemented into engines today that controls the air intake valve of the engine, increasing performance and fuel eco
Valve Timing,» a process implemented into engines today that controls the air
intake valve of the engine, increasing performance and fuel eco
valve of the engine, increasing performance and fuel economy.
Valve timing is the control
of opening and closing the
intake and exhaust
valves in synchronization with the up / down movement
of the...
VVT - iE (Variable
Valve Timing - intelligent by Electric motor) is a version of Dual VVT - i that uses an electrically operated actuator to adjust and maintain intake camshaft t
Timing - intelligent by Electric motor) is a version
of Dual VVT - i that uses an electrically operated actuator to adjust and maintain
intake camshaft
timingtiming.
Further milestones in the development
of turbo engines include sequential turbocharging with two consecutive chargers (for the first
time in the super car 959), bi-turbo charging with two parallel chargers (for the first
time in the 911 Turbo, type 993) and adjustable
intake valves (for the first
time in the 911 Turbo, type 996).
Like the power plant in the upcoming Honda Civic Si hatchback, the RSX engines use Honda's latest technology, which maximizes power by varying the
timing of intake and exhaust
valves.
Utilizing a two - stage
intake manifold and double - VANOS variable
valve timing, the 4.8 - liter, all - aluminum DOHC V - 8 churns out 360 horsepower and 360 pound - feet
of torque without ever seeming strained.
This Chevrolet Impala features the following options: TRANSMISSION, 6 - SPEED AUTOMATIC (STD), SEATS, FRONT BUCKET (STD), REAR PARK ASSIST, LS PREFERRED EQUIPMENT GROUP includes Standard Equipment, LS CONVENIENCE PACKAGE includes (UD7) Rear Park Assist, (AYR) manual - foldable rear head restraints and (AP9) cargo convenience net, JET BLACK / DARK TITANIUM, PREMIUM CLOTH SEAT TRIM, HEAD RESTRAINTS, REAR, ADJUSTABLE, FOLDING, ENGINE, ECOTEC 2.5 L DOHC 4 - CYLINDER DI WITH VARIABLE
VALVE TIMING (VVT) And intake variable valve lift (ivvl) AND NEW AUTO STOP / START (196 hp [146.2 kW] @ 6300 rpm, 186 lb - ft of torque [251.1 N - m] @ 4400 rpm)(STD), CARGO CONVENIENCE NET, TRUNK, and B
VALVE TIMING (VVT) And
intake variable
valve lift (ivvl) AND NEW AUTO STOP / START (196 hp [146.2 kW] @ 6300 rpm, 186 lb - ft of torque [251.1 N - m] @ 4400 rpm)(STD), CARGO CONVENIENCE NET, TRUNK, and B
valve lift (ivvl) AND NEW AUTO STOP / START (196 hp [146.2 kW] @ 6300 rpm, 186 lb - ft
of torque [251.1 N - m] @ 4400 rpm)(STD), CARGO CONVENIENCE NET, TRUNK, and BLACK.
Six - cylinder aluminium power unit with cylinders in horizontallyopposed arrangement, water - cooled, engine block and cylinder heads made
of aluminium, forged titanium connecting rods, four overhead camshafts, four
valves per cylinder, variable
valve timing (VarioCam with infinite adjustment) on
intake and exhaust side, hydraulic
valve play compensation, four - stage variable
intake mani - fold, dry sump lubrication, twin - chamber exhaust system, two metal catalysts, two oxygen sensors with dual control, 12 litres /
Helping broaden the powerband while simultaneously improving fuel efficiency
of the latest 3.7 L V - 6 is a new 2 - rocker arm design VTEC ® (Variable
Valve Timing and Lift Electronic Control) system applied to the
intake valves.
The 12 - cylinder monstrosity produces 510 bhp and 63.2 kgm
of torque and has, to its aid, dual variable
valve timing, enlarged throttle bodies and a revised
intake manifold, all
of which ensure typically effortless motoring pleasure.
Through solenoid
valve opening and closing
time control, a wide range
of optimum
intake valve opening schedules can be easily obtained.
Helping broaden the powerband while simultaneously improving fuel efficiency
of the 3.7 L V - 6 is a unique 2 - rocker arm design VTEC ® (Variable
Valve Timing and Lift Electronic Control) valvetrain system applied to the
intake valves.
Other noteworthy features
of this engine family include acoustically equal runner lengths and a tumble control
valve for the
intake manifold, a «silent»
timing chain, mirror finished crankshaft and camshaft journals, and offset cylinder placement for an attempt in increased efficiency.
From a 2.0 - liter, all - aluminum, in - line four - cylinder configuration, Honda squeezes 197 horsepower and 132 pound - feet
of torque using a high - volume
intake manifold and iVTEC, which encompasses its full arsenal
of computer - controlled variable -
valve timing and lift - control programs.
Thanks to new cylinder - heads with electronic VVT - i
valve timing, higher compression (11.8 v 12.3:1), titanium
valves, revised
intake ports and reduced mechanical losses, the F division's oversquare, 90 - degree 308ci V8 now churns out 351kW
of power (up 12 per cent) at 7100rpm and 530Nm
of torque between 4800 and 5600rpm, which are impressive numbers by any standard.
The VVT - i system controls the
intake camshaft within a range
of 47 °
of Crankshaft Angle to provide
valve timing suited to the engine operating condition.
The «intelligent» portion
of the system is its ability to continuously vary the
timing of the
intake and exhaust camshafts using variable
valve timing control (VTC).
The system combines
intake and exhaust VTC (Variable
Valve Timing Control), which continuously adjusts the intake and exhaust camshaft phase, with Variable Valve Timing and Lift Electronic Control (VTEC), which changes valve lift, timing and duration of the exhaust va
Valve Timing Control), which continuously adjusts the intake and exhaust camshaft phase, with Variable Valve Timing and Lift Electronic Control (VTEC), which changes valve lift, timing and duration of the exhaust v
Timing Control), which continuously adjusts the
intake and exhaust camshaft phase, with Variable
Valve Timing and Lift Electronic Control (VTEC), which changes valve lift, timing and duration of the exhaust va
Valve Timing and Lift Electronic Control (VTEC), which changes valve lift, timing and duration of the exhaust v
Timing and Lift Electronic Control (VTEC), which changes
valve lift, timing and duration of the exhaust va
valve lift,
timing and duration of the exhaust v
timing and duration
of the exhaust
valves.
Instead
of variable
valve timing system VANOS, on S62 used Double - VANOS (
intake and exhaust camshafts).
Some engines are designed to open each
intake valve at a slightly different
time, which increases turbulence, improving the mixing
of air and fuel at low engine speeds.
We have a brand - new variable
valve timing system where the exhaust and the
intake are completely independent
of one another.»
For maximum efficiency the petrol engine uses a twin scroll turbocharger, high precision injection, and variable
valve timing and variable camshaft control on both the
intake and exhaust sides
of the engine.
Variable
valve timing technology alters the
timing of a cylinder's
intake and exhaust
valves to maximize power.