The New Toyota 2.0-liter Inline 4-cylinder ESTEC D-4ST engine - turbocharged direct injection gasoline engine (English)

Aachen Colloquium Automobile and Engine Technology, 23, E65415, E65414, AK Fz + Motorentechnik 2014, Aachener Kolloquium Fahrzeug- und Motorentechnik, 23
; 2014
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Toyota has developed a new 2.0-liter inline 4-cylinder engine called the ESTEC D-4ST, a downsized turbocharged gasoline direct injection engine with superior thermal efficient combustion. This engine features a combination of a cylinder head with an integrated 4 into 2 exhaust manifold and a twin-scroll turbocharger, and achieves high-speed combustion using a fan spray direct and port injection system and a high in-cylinder tumble ratio. The engine also adopts the Atkinson cycle using Toyota's new center-spooled VVT with mid-position lock system (VVT-iW), crankcase ventilation using an ejector under boosted conditions, and heat management systems. This engine is capable of both seamless and invigorating acceleration while also ensuring good fuel economy. By taking advantage of these technologies, the engine achieves quick response and a high and wide torque band from low to high engine speeds, as well as larger operating regions in which excellent fuel economy and λ=1 combustion can be achieved. The resulting high levels of both fun-to-drive and environmental performance are the ideal expression of Toyota's next-generation engine development. In addition to basic structural elements such as the cylinder head, highly functional and critical components for engine performance, such as a twin-scroll turbocharger, VVT-iW, and a direct injection high-pressure fuel pump, were developed and fabricated in-house by Toyota. In this way, Toyota ensures high-quality for both the design and manufacture of this engine. The developed engine is compliant with emissions standards around the world, such as LEV III (ULEV 125) in North America, Euro 6, China 5, and J-SULEV. It is planend to adopt this engine in various models to meet the needs of customers all over the world.

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