US 11,987,375 B2
System and method for operating engines of an aircraft in an asymmetric operating regime
Patrick Manoukian, Saint-Laurent (CA); and Keith Morgan, Westmount (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed on Oct. 16, 2019, as Appl. No. 16/654,366.
Claims priority of provisional application 62/803,064, filed on Feb. 8, 2019.
Claims priority of provisional application 62/803,070, filed on Feb. 8, 2019.
Prior Publication US 2020/0255159 A1, Aug. 13, 2020
Int. Cl. B64D 31/10 (2006.01); B64D 31/14 (2006.01); F02C 9/00 (2006.01)
CPC B64D 31/10 (2013.01) [B64D 31/14 (2013.01); F02C 9/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for operating an aircraft having a first engine and a second engine, the method comprising:
receiving an engine availability confirmation when a set of engine parameters meet engine operating conditions for an asymmetric operating regime, the asymmetric operating regime being one in which the first engine is in an active mode to provide motive power to the aircraft and the second engine is receiving fuel and operating in a standby mode to provide substantially no motive power to the aircraft, the engine operating conditions including a difference in torque between the first engine and the second engine being less than a first threshold;
receiving an aircraft availability confirmation when a set of aircraft parameters meet aircraft operating conditions for the asymmetric operating regime;
outputting an availability message to a cockpit of the aircraft in response to receiving the engine availability confirmation and the aircraft availability confirmation;
receiving a pilot-initiated request to operate the first engine and the second engine in the asymmetric operating regime;
commanding the first engine and the second engine to operate in the asymmetric operating regime in response to the pilot-initiated request; and
delivering fuel to both the first engine and the second engine when the first engine and the second engine are operating in the asymmetric operating regime, to thereby obtain better fuel efficiency,
wherein the engine operating conditions include an environmental control system bleed load being disabled.