Recently, Audi released a new 2.0-liter TFSI gasoline direct-injection turbocharged high-efficiency engine at the 2015 Vienna Automotive Symposium. The engine demonstrates Audi's deep knowledge of engine technology. It uses a breakthrough combustion method with a fuel consumption of less than 5 liters/100 kilometers under the New European Driving Cycle (NEDC). At the same time, the engine has excellent power performance, the maximum power is 140 kW, the maximum torque is 320 Nm, and will be the first to apply to the next generation Audi A4.
More than a decade ago, Audi pioneered the application of turbocharged technology and in-cylinder direct injection technology to the production models, making it the leader in engine miniaturization and low-speed. Today, Audi has taken another critical step in the field of engine miniaturization. Professor Hakenberg, director of technology and R&D at Audi's management board, said: "The miniaturization of the Audi engine takes into account factors such as vehicle class, displacement, power, torque and efficiency, ensuring that users enjoy efficiency while still It has an excellent everyday car experience, and this new 2.0 TFSI engine is a model of Audi's 'Breakthrough Technology Enlighten the Future' brand concept."
The new 2.0 TFSI engine delivers up to 320 Nm of high torque in the 1,450 to 4,400 rpm range, delivering exceptional efficiency and power. The engine uses an innovative combustion method with a core principle comparable to the Miller cycle. Audi engineers have made improvements in the core of the engine to improve fuel efficiency, including:
The engine intake time is greatly shortened (the crank angle of 140 degrees replaces the crank angle of 190-200 degrees);
As the intake pressure increases, the engine can reach the optimum cylinder pressure in a shorter intake time;
The intake valve closes before the piston reaches bottom dead center, thereby reducing the medium pressure, resulting in a more efficient high compression ratio;
At partial load, the additional counter-current injection of the intake valve supplements the intake manifold and direct injection of the combustion chamber to achieve a more efficient mixed combustion gas;
The Audi Variable Valve Lift System (AVS) shortens the intake time for partial loads and increases the intake time for high loads.
Dr. Stefan Knirsch, Director of R&D at Audi Powertrain, said: "Thanks to the concept of Audi's miniaturized engine, this new engine has the efficiency of a small displacement engine at partial load, while also combining the dynamic performance of a large displacement engine. In other words, it has excellent fuel efficiency and performance throughout the engine's speed range."
In addition to the groundbreaking combustion method, this 140kg engine also uses a number of other efficient technologies. For example, coolant flow control that significantly reduces engine warm-up time, cylinder head integrated exhaust manifold, and low friction oil that reduces engine friction. A comprehensive high-tech solution gives the new 2.0 TFSI engine an unparalleled efficiency and once again sets a new benchmark for the market segment.
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