Aircraft piston engine load coordinating and controlling method

Abstract

The invention discloses an aircraft piston engine load coordinating and controlling method. The method is based on an engine load coordinating and controlling system. The engine load coordinating and controlling system comprises an FADEC control system, an electronic throttle body and an electric propeller pitch changing system, wherein the electronic throttle body and the electric propeller pitch changing system are separately connected with the FADEC control system; and the FADEC control system comprises a measurement sensor, a controller and an actuator. The sensor is used for measuring the rotating speed of an engine, the position of an operating lever, and parameters of the percentage of an electronic throttle. The electric propeller pitch changing system is used for mechanical decoupling of the operating lever and the rotating speed of a propeller; and the electronic throttle body is used for the mechanical decoupling of the operating lever and the percentage the throttle valve. The actuator is used for realizing oil injection and ignition of the engine. According to the method, an optimal algorithm is figured out through the operating condition of the engine based on a request for flight thrust power, so that an operating point is obtained through calculation; the expected throttle percentageand the rotating speed of the propeller at present are determined; and the throttle percentage and blade angles are adjusted through a closed-loop control system.

Description

technical field [0001] The invention belongs to the technical field of piston-type aero-engine control, and in particular relates to a load coordination control method of a piston-type aero-engine. Background technique [0002] Power drive systems based on piston engines and propeller propellers are widely used in light and ultralight fixed-wing general aviation aircraft. The traditional three-lever operating system uses the throttle lever to adjust the engine throttle opening, the pitch change lever to adjust the propeller speed, and the mixture ratio lever to adjust the engine mixture concentration. During the flight, the driver needs to cooperate with the three levers to operate, which is highly complex and difficult. The single-lever operating system using FADEC technology realizes the adjustment of throttle opening, propeller speed and engine mixture concentration through one joystick, which greatly simplifies the complexity and difficulty of operation and has obvious ...

AI Technical Summary

Problems solved by technology

The joystick is rigidly connected to the engine throttle body and the propeller speed setting mechanism. Once the position of the joystick is determined, the corresponding throttle opening and propeller speed are uniquely determined. Although the propeller pitch can be adjusted within a certain flight speed range The angle of the blade ensures the efficient operation of the propeller, but in the case of a certain position of the joystick, the free combination and best matching selection of the engine speed and throttle opening cannot be realized

Images