Having announced its new 2.0-liter TDI Clean Diesel engine in 2013, the Volkswagen Automotive Group is now rolling out the new oil burner across its global vehicle lineup. The new mill can be found in such models as the refreshed 2015 Jetta, among other VW vehicles, and features better fuel efficiency along with the Selective Catalytic Reduction (SCR) system. Here are the new engine’s most prominent features.
VW’s First New-Gen MDB Engine
The EA288 is also Volkswawgen’s first new-generation Modular Diesel System (MDB) engine in the U.S. Many components of the MDB engines are used in a modular way, such as components of the exhaust system as well as the injection system, turbocharging systems, and forced induction cooling within the intake manifold module.
The 2.0-liter EA288 TDI Clean Diesel is one of the most fuel-efficient engines in its class and conforms to the upcoming LEV3 emissions standard in the USA. Compared to its predecessor, the efficiency of this new-generation TDI was improved by eight percent.
The results are impressive: when equipped with a manual transmission, the 2015 Jetta TDI Clean Diesel delivers a manufacturer-estimated 32 MPG city, 45 MPG highway, and a combined 37 MPG, all while making 150 horsepower and 236 lb.-ft. of torque.
The new EA288 common rail TDI has two balancer shafts and is exceptionally comfortable and dynamic. In the Jetta, for instance, the motor develops its maximum 150 horsepower between 3500 to 4000 RPM, and the maximum 236 pound-feet of torque from just 1750 to 3000 RPM.
Selective Catalytic Reduction (SCR)
The EA288 also uses a complex exhaust gas recirculation system to conform to the current BIN5-ULEV2 emissions standard in the U.S., as well as the upcoming LEV3/TIER3 standard. In the 2015 Jetta TDI, the emissions control system includes Selective Catalytic Reduction (SCR) system located near the engine.
The layout enables extremely fast response by the oxidation catalytic converter and the SCR catalytic converter, with the latter significantly reducing oxides of nitrogen (NOx) using the AdBlue additive. Compared to the NOx storage catalytic converter (NSC) of the previous model, the use of the SCR catalytic converter not only further reduces emissions, but also improves fuel economy.
Reduced Internal Friction
On top of helping to reduce emissions, Volkswagen also designed the new TDI engine for minimal internal friction. One of the ways it has made this possible was by using piston rings with lower pretension and very low-friction camshaft bearings.
The engine’s energy efficiency has also been optimized by using an oil pump with volumetric control and two pressure levels, while an innovative thermal management system makes use of separate coolant loops for the cylinder head and the crankcase during the warm-up phase. The thermal management system also features a water pump that can be deactivated as appropriate.
First Available On 2015 Jetta (In U.S.)
The new EA288 has already been available in several VW models in Europe for several months. In the U.S., it will first become available on the 2015 Jetta in the third quarter of 2014, with will make its way to other TDI vehicles in the U.S. throughout the rest of the year.