Skip to main content

ads1

Volkswagen Brings Fuel Shut-Off To The Four Cylinder Engine


Cylinder deactivation isn’t a new idea; the technology was first implemented (with only moderate success) in the days following World War II. Over the past ten years, cylinder deactivation has become mainstream, and manufacturers routinely employ this on their V-6 and V-8 engines to boost fuel economy up to 20 percent.

No manufacturer has deployed the technology on a four-cylinder engine, at least until now. Volkswagen has announced that their 1.4-liter TSI engine, used on the European market Golf, Jetta, Scirocco and Tiguan, will utilize cylinder deactivation beginning in 2012.

The results of Volkswagen’s testing are impressive. On the European test cycle, cylinder deactivation is expected to improve fuel economy by some 2.5 miles per gallon; when combined with start / stop functionality, that figure will increase to around 3.9 miles per gallon.

The European test cycle for fuel economy is somewhat more optimistic than our own EPA testing, which typically delivers results 10 to 20 percent lower, but the potential fuel savings are still significant.

Cylinder shut-off will only occur under constant-throttle conditions, with the engine speed between 1,400 and 4,000 rpm. When the gas pedal position sensor detects a sudden change in throttle setting, the system instantly deactivates and the engine resumes running on all four cylinders. Volkswagen estimates that, based on the European fuel economy driving cycle, cylinder shut-off will be employed for 70 percent of a driver’s time behind the wheel.

Volkswagen will begin using cylinder deactivation on their 1.4-liter TSI engine for European market vehicles in 2012. There are no plans to bring this engine to the United States at the current time, but it stands to reason that Volkswagen may eventually  deploy cylinder deactivation across their engine range as a way of boosting Corporate Average Fuel Economy.


Comments

Popular posts from this blog

1966 Volvo Amazon Custom Coupe by Bo Zolland

(from Bo Zolland) This a custom VolvoCoupe design by Bo Zolland for a custom car and Volvo collector in Arizona.

1966 Amazon 2 Door is the base, but with added custom tricks and coupe roof. The front and grille are little modified due to identification visibility. The car will have a Volvo 2004 S-80 T-6 engine/trans and rear wheel drive, modern brakes etc. Air ride suspension and a mix of modern Volvo and Vette components in chassis.

2012 Audi TT & TTS Coupe & Roadster review

The new 2012 Audi TT & TTS The Audi TT continues to define the sports coupe and convertible segments. Its iconic, bold styling sends a clear message of performance and dynamic handling, while its turbocharged engine delivers class-leading power and efficiency. 2012 Audi TTS Roadster 2.0 TFSI photo Inside, occupants are treated to an interior built with the same high quality materials found in the A8 flagship. 2012 Audi TTS Coupe 2.0 TFSI photo The Audi TT Coupe and Roadster are powered by the award-winning 2.0-liter TFSI® engine for the 2012 model year. The inline-four generates 211 hp and 258 lb-ft of torque between 1,600 and 4,200 rpm. Complete with the Audi valvelift system, direct fuel injection, two balance shafts and a high compression ratio of 9.6:1, the engine contributes fuel efficiency and performance, a rarity in a true performance sports car. 2012 Audi TTS Roadster 2.0 TFSI photo Fitted with a six-speed S tronic® dual clutch transmission that also can be actuated by two …

Audi A1 S-line : 2012

Audi is extending the A1 family – the A1 Sportback is coming in early 2012. The five-door model is emotional and individual, communicative and youthful, sporty and efficient. The A1 Sportback hopes to build on the success of the three-door A1. 2012 Audi A1 S-line. The S line exterior package option has smart and sporty details. The accessories program for the A1 Sportback will later include kits with aerodynamic add-on parts and colorful decal sets. Upon request, Audi will paint the roof line – the roof arch, the roof and the roof spoiler – in one of three contrasting colors. A choice of 12 paint finishes are available, including the new color Samoa Orange, which is exclusive to the A1 Sportback. The Audi A1 Sportback is 3.95 meters (12.96 ft) long and has a wheelbase of 2.47 meters (8.10 ft), just like the three-door model. It is six millimeters (0.24 in) wider and taller than the three-door model, however, at 1.75 meters (5.74 ft) and 1.42 meters (4.66 ft), respectively. Its aerodyn…