Alliedsignal Inc.

The Garrett Corporation

James E Strang

Dan S Matulich

Robert C Kinsell

Kim E Linnett

Michael P Saba

An environmental control system includes an air cycle machine, an electrical machine coupled to the air cycle machine, and a controller for the electrical machine. The controller can cause electrical energy to be extracted from the electrical machine whenever cooling capacity and/or airflow rate of the air cycle machine are greater than necessary. The electrical machine can also be operated as a motor to increase the airflow rate and cooling capacity of the air cycle machine.

Environmental control system including air cycle machine and electrical

Working fluid from a source thereof and which is to be conditioned in heat exchangers and fluid conditioning means is admitted lastly to the passageways of a heat exchanger and to a bypass around the passageways to provide to the point of use a fluid from the passageways in a final condition tempered by the bypassed fluid.

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Fountain Valley, CA, United States of America

James E Strang