Electronic control device for engineering machinery and working method

Abstract

The invention discloses an electronic control device for engineering machinery and a working method. A controller is connected with a parking brake switch, a handle meso-position switch, an accelerator idle switch, a starting switch, a starting relay contact, an engine ECU (electronic control unit) and a flameout switch. The engine ECU is connected with an engine and a starting relay coil, one endof the starting relay contact is connected with the controller, the other end of the starting relay contact is connected with a starter, and the controller is further connected with a brake valve. The emergency flameout switch and a power forced recovery switch are further connected between the controller and the engine ECU, and an emergency brake switch is further arranged to control a power supply of the whole electronic control device. Damage to the engine and a pressurizer caused by improper operation in the starting and flameout process of the engine can be avoided, damage to the starterand a storage battery caused by improper operation in the starting process is avoided, emergency brake of the whole machinery can be realized, emergency flameout of the engine can be realized, poweris recovered in a forced manner under perilous working conditions, and safety and reliability of the whole machinery are greatly improved.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to an electric control device for construction machinery and a working method. Background technique [0002] The current construction machinery can start and stop the engine under high throttle, but this will cause damage to the engine, especially the damage to the supercharger; the engine does not have a good safety protection system before starting, and the safety and reliability of the whole vehicle is not good. High; during the starting process of the engine, the control and protection of the starting process is insufficient, resulting in damage to the starter and the battery; moreover, when the engine fails and the power is reduced, if the whole machine is on a ramp or in a dangerous area at this time, there is no Good countermeasures can cause great harm. Contents of the invention [0003] In order to solve the deficiencies in the prior art, the present inven...

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Problems solved by technology

[0003] In order to solve the deficiencies in the prior art, the present invention provides an electric control device and working method for construction machinery, which solves the problem that the engine and supercharger are easily damaged when the existing engine is started at non-idling speed, and the engine is turned off, and the engine is damaged due to improper operation during the start-up process. The starter and the battery are damaged, the engine fails or the power is reduced, and there are technical problems without safety protection measures

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