US 12,377,989 B2
Environmental control system
Deepak Kumar, Bangalore (IN); Prashant Deshpande, Bangalore (IN); Muralidhar Manavalan, Bangalore (IN); and Prakash V S, Bangalore (IN)
Assigned to Honeywell International Inc., Charlotte, NC (US)
Filed by Honeywell International Inc., Charlotte, NC (US)
Filed on May 16, 2023, as Appl. No. 18/318,137.
Claims priority of application No. 202311012637 (IN), filed on Feb. 24, 2023.
Prior Publication US 2024/0286746 A1, Aug. 29, 2024
Int. Cl. B64D 13/08 (2006.01); B64D 13/06 (2006.01); B64D 27/02 (2006.01)
CPC B64D 13/08 (2013.01) [B64D 2013/0618 (2013.01); B64D 27/026 (2024.01)] 18 Claims
OG exemplary drawing
 
1. A system comprising:
a turbine comprising an input port and mechanically coupled to a motor-generator and a compressor, wherein the input port of the turbine is fluidically coupled to a low pressure bleed port of an engine, wherein the input port of the turbine is fluidically coupled to a high pressure bleed port of the engine via a bleed port valve; and
control circuitry configured to:
determine whether a pressure of a fluid at the input port of the turbine is less than or equal to than a threshold pressure;
in response to determining that the pressure of the fluid at the input port of the turbine is less than or equal to the threshold pressure, determine an operational state of a vehicle; and
in response to determining that the operational state of the vehicle is a first operational state, cause the bleed port valve to close to provide the fluid to the input port of the turbine via the low pressure bleed port and cause the motor-generator to operate in motor mode,
wherein the motor-generator is configured to be mechanically coupled to the compressor,
wherein the motor-generator is configured to provide mechanical energy to drive the compressor when operating in motor mode,
wherein the vehicle is an aircraft, and the first operational state comprises one of taking off, climbing, or cruising.