Supercharging pressure control method for sequential turbo engine

Abstract

Abstract PURPOSE:To facilitate a control in such a case where fuel having a different octan number is used by operating both turbo superchargeres at a high efficiency, in particular, in a twin turbo mode. CONSTITUTION:Waste gate valves 41, 51 are provided in both turbo superchargers 40, 50 so that may be opened and closed independenty by controlling a blower discharge pressure by means of duty solenoid valves 43, 53 to act on actuators 42, 52 after setting the volume of a primary turbo supercharger 40 to be small and that of a secondary turbo supercharger 50 to be large. In a twin turbo mode, the waste gate valve 51 of the secondary turbo supercharger 50 is fully closed, and only waste gate valve 41 of the primary turbo supercharger 40 having a large exhaust resistance is opened and closed, thereby boost pressures generated by the operation of both turbo superchargers 40, 50 are collectively controlled.

Inventors

• 👤 Minoru Nameki
• 👤 稔 行木

Bibliographic Details