초록 ▼

An emergency pressurization system for an aircraft having an air pump that is powered by bleed air from an engine of the aircraft. Although the air pump is powered by engine bleed air, the air pump draws ambient fresh air from outside the aircraft, compresses the fresh air to a predetermined pressur

An emergency pressurization system for an aircraft having an air pump that is powered by bleed air from an engine of the aircraft. Although the air pump is powered by engine bleed air, the air pump draws ambient fresh air from outside the aircraft, compresses the fresh air to a predetermined pressure and pumps compressed fresh air into the pressurized cabin of the aircraft without ever exposing the compressed fresh air to the engine air. The speed of the air pump is selectively controlled as a function of cabin pressure and/or bleed air pressure. In this manner, the cabin is maintained at a constant safe pressure.

대표청구항 ▼

What is claimed is: 1. In an aircraft having a cabin with an internal pressure and an engine that produces compressed engine air, an emergency pressurization system for pressurizing the aircraft should said internal pressure fall below a threshold pressure, said system comprising:a regulator that re

What is claimed is: 1. In an aircraft having a cabin with an internal pressure and an engine that produces compressed engine air, an emergency pressurization system for pressurizing the aircraft should said internal pressure fall below a threshold pressure, said system comprising:a regulator that receives said compressed engine air from said engine, said regulator passing a first output flow of compressed air only if said internal pressure fall below said threshold pressure, wherein said first output flow has a flow rate proportional to a pressure difference between said internal pressure and said threshold pressure;a limiting valve controlled by said first output flow of said regulator, said limiting valve receiving said compressed engine air from said engine and passing a second output flow of compressed air, wherein said second output flow is governed by said first output flow received from said regulator; andan air pump powered by said second output flow, wherein said air pump draws ambient fresh air from outside the aircraft, compresses the fresh air to a predetermined pressure and pumps compressed fresh air into the cabin of the aircraft, therein raising said internal pressure without contaminating the fresh air with the compressed engine air.