"Cylinder deactivation" refers to a process in engines where some cylinders are temporarily shut off to improve fuel efficiency. This means that a few cylinders stop working when there is less demand for power, allowing the engine to conserve fuel while still maintaining performance.
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One of the most important would be the 1.8 - liter four - pot petrol engine
with cylinder deactivation system, the one that can already be seen on the Audi's A3 hatch.
Despite the fact that it only has three cylinders, the all - aluminum 1.5 - liter unit features
cylinder deactivation technology for further reduced fuel consumption and CO2 emissions — Ford estimates 114 g / km.
The next generation C - Class will be powered by 4 - cylinder engines
featuring cylinder deactivation technology making the cylinders run on two cylinders and saving crucial amount of fuel.
In the Bentayga it makes 600 horsepower and 664 pounds - feet of torque, plus it's fitted with
cylinder deactivation for better efficiency.
It still uses direct injection and Chevrolet's Active Fuel Management
cylinder deactivation tech but doesn't seem to be Flex Fuel compatible.
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The engine is mounted longitudinally and has features such
as cylinder deactivation on light throttle load and a stop / start system.
The engine gets Merc's AMG Cylinder
Management cylinder deactivation system which deactivates four of the eight cylinders of the engine under partial load to aid fuel efficiency.
Though this emphasis on efficiency might seem somewhat in conflict with the idea of luxury and excess, new eight - speed automatic transmissions and gas - saving features like
cylinder deactivation on the twin - turbo V - 6 should give the Cadillac competitive efficiency numbers, an increasingly important criteria for the global luxury market.
The new trucks maximize the use
of cylinder deactivation with improved engine mounts, electronic throttle control, adaptive exhaust systems, improved aerodynamics, low - rolling resistance tires, and other technologies that help the engines operate in four - cylinder mode for longer periods of time, further increasing efficiency.
Ford includes
cylinder deactivation in the new ST, which kills fuel and shuts the valves on one cylinder in an effort to help the small hot hatch sip more fuel.
The big news under the hood is that the Fiesta's popular 1.0 - liter EcoBoost three - cylinder engine is available with a fuel -
saving cylinder deactivation system.
Adding
cylinder deactivation helps highway fuel economy rise by 1 mpg, to 29 mpg for front - wheel - drive models and 28 mpg for all - wheel - drive models.
Revised direct injection, updated variable valve timing, and
new cylinder deactivation technology make up the engine improvements.
Over the previous model, the high output valve timing contributes to the engine's output increase of 9 percent, while the
added cylinder deactivation reduces pumping losses by 66 percent to help improve electrical regeneration capability by 1.7 times.
And all this from a twin - turbocharged version of the venerable 6.75 - litre V8, which has been brought up to date with
cylinder deactivation while at a steady - state cruise.
«Fuel - efficiency and CO2 emissions from both EcoBoost petrol engines are enhanced using Ford's industry -
first cylinder deactivation system for a three - cylinder engine, which can automatically stop one of the engine's cylinders when full capacity is not needed, such as when coasting or cruising with light demand on the engine,» the automaker says.
The rear cylinder bank's valve gear can also leave all intake and exhaust valves closed to maximize fuel efficiency
during cylinder deactivation.
Up front (and up high) is a 5.3 - litre V8 used in other GMC trucks, pushing out 355bhp and 383 lb ft.. The two upgrades are, for efficiency, a 3.0 - litre Duramax diesel or a 6.2 - litre petrol V8 with 420bhp and 460 lb ft.. Both petrols have
clever cylinder deactivation tech that can allow the AT4 to burble along on as little as one cylinder.
The fuel efficiency rating has been aided
by cylinder deactivation technology, direct injection and continuous variable valve timing.
The V8
got cylinder deactivation as standard as part of the 2011 facelift, but in 2015 the W12 was also given the ability to run on six cylinders when power demands are low.
The engine features
standard cylinder deactivation for more efficiency and is mated to the AMG Speedshift MCT (Multi Clutch Technology) 9 - speed automatic transmission with paddle shifters.
Incidentally, despite the sensational power and torque output, the new engine is surprisingly fuel efficient and implements an electronically
controlled cylinder deactivation system.
The engine features Fuel
Saver cylinder deactivation technology, cooled exhaust gas recirculation, variable valve timing, a high - volume oil cooler, oil jets for piston cooling, and aircraft - grade stainless steel gaskets and fasteners for improved durability at high temperatures.
This means they all come with variable valve timing, direct fuel injection, and Active Fuel Management, otherwise
called cylinder deactivation.
The high output valve timing contributes to the engines increase in output of 9 percent, while the added
cylinder deactivation reduces pumping losses by 66 percent to help improve electrical regeneration capability by 1.7 times.
Both the Flying Spur V8 and the Continental GT V8 feature
intelligent cylinder deactivation tech on the V8 engine, which uses only four of the eight cylinders (hence making it a V4) at cruising speeds, in order to minimize fuel wastage.
That engine with
cylinder deactivation dropped into the Mustang would probobly bring it from 19 / 28mpg to 21/31 no mods and have more power then the standard V8's of just 8 years ago.
Paired with a seven - speed automatic transmission, the new engine also features
cylinder deactivation so it should be more fuel efficient than the V - 10 it replaces... but that's only if you can resist the temptation to let «er rip.
Fuel consumption values of the EA211 engines were reduced by 8 to 10 %, in part due to reduced internal friction, lower weight and optimized thermal management; in conjunction with the new
ACT cylinder deactivation system, the savings potential can be as much as 20 %.
Amazingly, thanks to a stout six - speed automatic, direct injection, variable valve timing and a truly
seamless cylinder deactivation system, the 6.2 achieves 15 mpg city and 21 mpg highway on two - wheel drive models.
Turbocharged and
utilising cylinder deactivation tech and a petrol particulate filter, it makes a sturdy 161bhp with 184 lb ft of torque, delivered through either a six - speed manual or seven - speed
Aside from a very lovely windmill farm, this is perhaps the least exciting stretch of highway in the Midwest, so I get into the right lane, set cruise control to 77 mph, put the Corvette into Eco mode, and let
cylinder deactivation turn the V - 8 engine into a V - 4.
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