VW’s New 2.0L Diesel Will Bring New Engine Tech to U.S. – Eventually - Engine Builder Magazine

VW’s New 2.0L Diesel Will Bring New Engine Tech to U.S. – Eventually

As a rejuvenation of the current VW 2.0L diesel found in the non-U.S. Passat, the new engine adds several salient new features and upgrades. Variable valve timing is a new feature, and so is a special start-stop system, which shuts off the engine in the event the car’s speed falls below 7 mph.

volkswagen-2-0-liter-diesel-with-electrically-driven-turbo-and-268-horsepower_100489617_l-e1416020772569Volkswagen’s 2.0L diesel 4-cylinder engine produces 268 horsepower and unspecified torque figure; most are anticipating the torque number to be well over 400 lbs. ft.

With a power to volume ratio of 134 horsepower per liter (more than Ford’s  renowned 1.0L EcoBoost) the Volkswagen 2.0L employs Formula 1 grade technology and reportedly achieves record efficiency.

As a rejuvenation of the current VW 2.0L diesel found in the non-U.S. Passat, the new engine adds several salient new features and upgrades. Variable valve timing is a new feature, and so is a special start-stop system, which shuts off the engine in the event the car’s speed falls below 7 mph.

The new 2.0L does add an interesting twist where fuel injection is concerned. Instead of employing the time-tested PD unit injector fuel delivery system, VW went with a common rail injection system, delivering fuel directly to each combustion chamber. The new common rail system delivers fuel at a very high rate, operating at nearly 36,000 psi, or 2,500 bar, which is higher than the current VW TDI engines utilizing unit injection.

A piezoelectric system is used in the fuel injection system. This technology uses quartz crystals situated within the injectors, which expand when electricity is applied. Because the voltage applied to each injector can be manipulated and fine tuned by the ECU, it heightens the precision and efficiency of the injection process.

Perhaps the most technologically advanced aspect of the engine is its turbocharger unit. The turbocharger employed here is Formula 1 grade. Stemming from Audi technology soon to be employed on the next R8, the design essentially uses an electric motor to drive the compressor at lower rpm ranges.

This design will employ an electric motor to drive the turbo at lower rpm, until engine output is sufficient to drive the turbo by exhaust gases. Now, instead of waiting for the exhaust gases to reach a suitable level, power is available almost instantaneously. In Formula 1, the power for this system comes from the KERS system.

Another curious aspect of VW’s improvisation of this turbocharger design is the fact that, in addition to being electrically driven at lower outputs, the engine employs a “twin-turbo” setup. The question of the function of the second turbo is a mystery. Given that the engine is a straight four, that rules out the possibility of a parallel setup, and a sequential setup would seem unlikely due to the presence of the electrical unit. Perhaps, drawing on efficiency concerns, one compressor may be driven electrically, while the second may be much larger and driven by an exhaust turbine; though the first compressor would then technically be reclassified as some sort of supercharger.

The engine will be coupled to Volkswagen’s new 10-speed, dual clutch transmission, pictured below. The 10-speed is of the direct shift gearbox design, which allows either automatic or semi-automatic modes of operation. It replaces the current line of six-speeds and constitutes part of VW’s efforts to drastically improve fuel efficiency across their model range.

Arriving within the next couple of years, this new engine will be one of the more advanced on the market. It represents Volkswagen’s continued commitment to building diesel engines for passenger cars – a trend which seems to have caught on everywhere but in the U.S.

Sterling Shriber

Speedville.com

You May Also Like

Shop Solutions January 2023

Next time you have set of large journal small block Chevy connecting rods to resize, consider honing the big ends of them for a +.002” outside diameter bearing that the LS engines with fracture cap rods use.

Engine and Machine Shop Tips and Tricks

DOUBLE BYPASS

For proper block cleaning, the oil bypass valves in Gen 5 and 6 big block Chevys need to be removed. We made a couple different sized “hook” tools for a slide hammer. This tool will easily pull the valves out of the block and sometimes without damaging them.

Top 10 Ken Block Gymkhana Films

Who doesn’t like a little bit of burnt rubber?

America’s Best Engine Shops 2022 | H&H Flatheads

Despite not being a fancy, state-of-the-art set up, Mike and his team at H&H have a great thing going. The equipment does exactly what it needs to, his team is experienced and the shop has built thousands of vintage engines for customers everywhere!

America’s Best Engine Shops 2022 | Choate Engineering Performance

This shop’s dedication to quality engine work, its growth, its machining capabilities and its impact in the diesel industry, all make Choate Engineering Performance well deserving of Engine Builder’s and Autolite’s 2022 America’s Best Diesel Engine Shop award.

America’s Best Engine Shops 2022 | 4 Piston Racing

The 4 Piston Racing facility in Danville, IN houses two buildings – one is 12,000 sq.-ft. and the other is 2,500 sq.-ft. The shop is very heavily focused on Honda cylinder heads and engine work to the tune of 300+ engines and 1,000 cylinder heads annually!

Other Posts

1,000 Horsepower LB7 Duramax Engine

Like many before him, Bryan Woitas got bit by the diesel bug after experimenting with some mild power-adders on his daily driver. Years later, he has a 1,000-horsepower LB7 Duramax to show off!

EB Takeover: W.O.T. Motorsports

We join W.O.T. Motorsports‘ co-owner Josh McCormack for a tour of his new diesel engine, transmission and truck maintenance/repair shop in Abingdon, VA, which he co-owns with David Petrick. Both Josh and David have been high-horsepower diesel mainstays in recent years, and the two recently joined forces to start this shop. See what they have

Twin-Turbo LB7 Duramax-Powered Z28 Camaro

At the 2022 Ultimate Callout Challenge, the Exergy booth had a Z28 Camaro parked in front. The car caught out attention, but our interest was piqued when we noticed it was a twin-turbo Duramax engine and not a gas engine sitting in the engine bay. We spoke to Lavon Miller of Firepunk Diesel, the shop

Dual Compound-Turbo 6.6L LBZ Duramax Engine

Not only does this 1954 Chevrolet 3100 house a hefty 6.6L LBZ Duramax engine, it boasts a quad-turbo setup and enough piping to blow your mind! Check it out!