Supercharger for internal-combustion engine

Abstract

Abstract PURPOSE:To provide a smooth torque curve throughout a whole range of an engine and to improve operation feeling, by a method wherein a supercharge pressure is switched in 3-stage according to a load condition by the use of 2 exhaust turbo superchargers. CONSTITUTION:When a load is below the first set value of an engine, a suction switching valve 30 on the low seed side and an exhaust switching valve 32 are closed, a suction switching valve 21 on the high speed side and an exhaust witching valve 23 are opened, and only a supercharger 12 on the low speed side is operated. When the load is increased to the first set value, the switching valves 30 and 31 are opened, the switching valves 21 and 23 are closed, and only a supercharger 15 on the high speed side is operated. When the load exceeds a second set value, the switching valves 30, 31, 21, and 23 are closed, and the supercharger 12 on the low speed side and the supercharger 15 on the high speed side are both operated.

Inventors

• 👤 Keiji Hatanaka
• 👤 畑中　啓治

Bibliographic Details