Helicopter engine cold start control circuit

Abstract

The invention relates to a cold start control circuit, in particular to a helicopter engine cold start control circuit. The flight control and slowing control end of a start control switch (1) is connected with the input end of an engine start control module (2). The stop end of the start control switch is connected with the input end of an engine cold start control button. A direct current power source controls working of an engine start ignition device (6) and a start generator (8) through a contactor of a rotation speed control module (4) and a contactor of the start control module (2). The helicopter engine cold start control circuit is characterized in that the engine cold start control button (7) is connected to the stop control end of the engine start control switch (1). Start control and engine stop control are connected together, thus, engine cold start control during normal working of an engine can be effectively avoided on the premise that normal start control of the engine is not affected, and normal working of a helicopter is not affected even if a pilot operates incorrectly.

Description

technical field [0001] The invention relates to a cold start control circuit, in particular to a helicopter engine cold start control circuit. Background technique [0002] The current helicopter engine start control circuit can be found in figure 1 , which consists of engine start and stop control switch 1, start control module 2, stop control module 3, speed control module 4, stop solenoid valve 5, engine start ignition device 6, engine cold start control button 7, and starter generator 8. The flight control and idle control terminals of the start control switch 1 are connected to the input terminal of the engine start control module 2, the start control module 2 controls the contactor to be turned on, and the DC power controls the engine start and ignition through the speed control module 4 and the contactor of the start control module 2 The work of the device 6 and the starter generator 8 drives the engine of the helicopter to start. When the helicopter detects that the...

AI Technical Summary

Problems solved by technology

[0004] Its disadvantage is: under normal circumstances, after the engine starts normally, the starter generator acts as a generator

This state does not require cold start of the engine, and the cold start only needs to run under the engine stop state. After the engine starts normally, the driver may misoperate the cold start control. In this case, turn on the start generator The starting function of the helicopter may cause overheating of the starter generator, which will affect the normal operation of the starter generator and affect the safety margin of the helicopter.

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