Patent ID: 9234707
Filing Date: 2016-01-12
CPC Classification: B64D,F02C,F28D,F28F

Claim Text:
1. A bypass pre-cooler comprising: a housing; an inlet configured to receive core engine airflow into the housing from one or more aircraft ducts; a heat exchanger within the housing; a bypass section within the housing having an airflow path separate from and surrounding the heat exchanger; a sleeve valve having an outer surface forming with the housing an annular inlet section of the bypass section, the sleeve valve coupled to the inlet and configured to switch airflow between the heat exchanger and the bypass section using circumferentially spaced ports; an outlet coupled to the heat exchanger and the bypass section; at least one processor; a pressure sensor coupled to the at least one processor, wherein the pressure sensor monitors an air pressure downstream from the housing; and an actuator coupled to the at least one processor and the sleeve valve to control opening and closing of the sleeve valve, wherein the at least one processor controls opening and closing of the sleeve valve based on the air pressure downstream of the housing as monitored by the pressure sensor.