Crossover points between homogeneous and stratified mixtures produce semi-stratified air/fuel mixture for smooth torque transition Torque production in the low-and middle-speed ranges is improved by 10% over conventional engines while fuel economy in the Japanese 10-15 urban fuel economy test is improved by a significant 30% or better Moreover, Toyota claims the quicker response presented by the Di design improves 0 to 62 mph(0-100 km/h) and passing acceleration times by 10%Crossover points between homogeneous and stratified mixtures produce semi-stratified air/fuel mixture for "smooth torque transition." Torque production in the low- and middle-speed ranges is improved by 10% over conventional engines, while fuel economy in the Japanese 10-15 urban fuel economy test is improved by a significant 30% or better. Moreover, Toyota claims the quicker response presented by the DI design improves 0 to 62 mph (0-100 km/h) and passing acceleration times by 10%