Throttle split monitor for aircraft with intermixed engines

US5001644A · kind A · utility

Assignee

• The Boeing Company · US

Inventors

• Kenneth E. Goheen · Bellevue, US
• Douglas Jackson · Mercer Island, US

Key dates

• Filing date: Oct 19, 1989
• Grant date: Mar 19, 1991
• Expiry date: Oct 19, 2009

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02C9/42
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A throttle split monitor (11) for monitoring a multiple engine aircraft having an automatic throttle (A/T) control system is disclosed. The throttle split monitor (11) comprises a throttle angle section (13), a tachometer section (15) and a throttle limit section (17). The throttle angle section receives signals containing information representative of the positions of the throttles of an aircraft. Based on the throttle position information, the throttle angle section determines the throttle split angle between the positions of the throttles associated with similarly placed engines on opposite sides of the aircraft and adjusts said throttle split angle to compensate for throttle position differences associated with engines producing equal levels of thrust. The throttle angle section produces an A/T disengage signal when said adjusted throttle split angle exceeds a predetermined value. Similarly, the tachometer section receives signals containing information representative of the rate of change of the throttles of the aircraft. Based on the rate-of-change information, the throttle angle section determines the difference between the rate of change of the throttles associated with sim…