Throttle split monitor for aircraft with intermixed engines

Details Throttle split monitor for aircraft with intermixed engines Throttle split monitor for aircraft with intermixed engines

1989-10-19

1991-03-19

Lall, Parshotam S.

Boots, shoes, and leggings

60224, G06F 1546

Patent

active

050016440

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 similarly placed engines located on opposite sides of the aircraft and adjusts said difference to compensate for throttle rate-of-change differences associated with engines producing equal levels of thrust. The tachometer section produces an A/T disengage signal when said adjusted throttle difference exceeds a predetermined value. The throttle limit section limits engine throttle commands such that the throttle angle section and the tachometer section will not produce A/T disengage signals under normal operation.

REFERENCES:
patent: 4212444 (1980-06-01), Stephan
patent: 4220993 (1980-09-01), Schloeman
patent: 4410948 (1983-10-01), Doniger et al.
patent: 4546353 (1985-10-01), Stockton
patent: 4569021 (1986-02-01), Larson et al.
patent: 4912642 (1990-03-01), Larsen et al.

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