Supercharging pressure control device

Abstract

According to the supercharging pressure control device of the present invention, the speed of the turbocharger 10 of an internal combustion engine 1 for aircraft is controlled by adjusting the opening of a wastegate valve 26. The control device of the internal combustion engine detects the outlet air pressure of the turbocharger compressor 16 and the turbocharger speed, and based on these values switches between PD control for maintaining the outlet air pressure constant and NT control for maintaining the turbocharger speed constant. That is, if the compressor outlet pressure exceeds a reference value during PD control, NT control is started, while if the compressor outlet pressure exceeds a reference value during NT control, the PD control is started. This enables a drop in the speed of the supercharger to be suppressed and the engine to be operated using its performance to the full extent regardless of changes in atmospheric pressure.

Dependencies are inferred from the claim text.