Systems and methods for controlling aircraft main engine speeds by adjusting compressed air flow from an APU
US9567906B2 · kind B2 · utility
7Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2013 |
| Grant date | Feb 14, 2017 |
| Priority date | — |
| Expiry date | Mar 20, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2270/306
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An aircraft engine system includes a main engine having a main engine speed; a starter coupled to the main engine and configured to drive the main engine with compressed air; and an auxiliary power unit (APU) system coupled to the starter and configured to provide the compressed air to the starter. The APU system includes an APU with a compressor to generate the compressed air, and an APU electronic control unit (ECU) coupled to the APU, the APU ECU configured to receive the engine speed of the main engine and to control operation of the APU to modify an amount of the compressed air to the starter based on the main engine speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.