ENGINE EQUIPPED WITH EXHAUST TURBOSUPERCHARGER

摘要

PURPOSE:To improve the output in high-speed region without incurring the reduction of the output in low speed region by installing the second bypass passage separately from a bypass passage into an exhaust passage and reducing the dimension of a waiste gate valve. CONSTITUTION:The first valve 9a opens at the number N1 of engine revolution, and the opening degree gradually increases with the increase of the number of engine revolution, and the valve 9a is perfectly opened at the number N2 of engine revolution. The second valve 9b is switched from the perfect opening to the perfect closing when the number of revolution of the engine 9b reaches N2. A waiste gate valve 5 gradually increases its opening degree with the increase of the number of engine revolution after the number N2 of engine revolution is reached.