
Check out the new Prius for highest fuel economy of any vehicle without a plug at Hooman Toyota TORRANCE, Calif., – In its fourth generation, the Toyota Prius is set to take on new markets with groundbreaking environmental performance, a stylish new design, and a fun-to-drive spirit. Today, Toyota is proud to unveil the technological advances that enable its hybrid flagship to break the mold while still remaining true to form. Toyota has made significant improvements in its new generation full hybrid powertrain, reducing losses, redesigning and relocating key components and reducing weight. Extensive changes to the transaxle, engine and combined hybrid system, generate an expected 10 percent improvement in EPA estimated MPG on core models, with an Eco model that will achieve an even greater improvement. Engine with Unprecedented Thermal Efficiency The new Prius retains the established 1.8-liter VVT-i gasoline engine, however, the engine has been completely re-engineered, with remarkable results in terms of performance, fuel economy, and reductions to size and weight. The new engine achieves a ground-breaking maximum thermal efficiency of 40 percent. This improvement was enabled in part through the use of a large-volume exhaust gas recirculation (EGR) system and improvements in combustion efficiency. Additionally, a redesigned air intake port improves airflow inside the combustion chamber, while the coolant passages have been redesigned to optimize internal engine temperature. The friction created by the piston skirts, rotating parts and the oil pump has been reduced, while the use of low-viscosity oil reduces friction between sliding engine components. Read More …








