Speaking of turbocharging technology, it has a history of 100 years. 1905, Dr. Alfred Butch applied for the patent of the first turbocharger-the power-driven axial-flow turbocharger. 196 1, the supercharger was tentatively installed in the car, but the effect after installation was not ideal due to the huge pressure and heat generated instantly. Saab from northern Europe and Sweden is the first automobile manufacturer to apply turbocharger to automobile products. Saab Saab 99, which came out in 1977, really made the application of turbocharging technology in automobile engines mature, and its arrival also announced the birth of a new era in automobile industry. Turbocharging technology rewrites the traditional concept that "displacement determines power".