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Power limit matching control system, method and device and engineering machine

A technology of limit power matching and control system, applied in electrical control, mechanical equipment, engine control, etc., can solve problems such as engine stalling, sudden increase of load torque, restricting product controllability and reliability, etc., to improve the stalling phenomenon , Improve the effect of handling and reliability

Active Publication Date: 2014-03-26
ZOOMLION HEAVY IND CO LTD
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  • Abstract
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Problems solved by technology

[0004] The inventors of the present application found that if the operating handle is too fast or the engine load torque suddenly increases due to other factors, the engine is still prone to flameout, which seriously restricts the handling and reliability of the product

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  • Power limit matching control system, method and device and engineering machine
  • Power limit matching control system, method and device and engineering machine
  • Power limit matching control system, method and device and engineering machine

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Embodiment Construction

[0035] In order to effectively improve the flameout phenomenon caused by engine power mismatch, and further improve the controllability and reliability of the product, the embodiments of the present invention provide a limit power matching control system, method, device and a construction machine. In the provided control system, when the engine speed is lower than the speed threshold corresponding to the current gear, the control device will output a speed adjustment control signal to the engine control module of the engine, so that the engine speed increases to the speed target, so that the engine power Matching the load power, this solution effectively improves the flameout phenomenon caused by the mismatch of engine power, and improves the controllability and reliability of the product. The present invention will be described in detail below with specific embodiments and in conjunction with the accompanying drawings.

[0036] like figure 1 and figure 2 As shown, the limi...

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Abstract

The invention relates to the technical field of engineering machinery and discloses a power limit matching control system, method and device and an engineering machine. The power limit matching control system, method and device and the engineering machine are used for effectively reducing the flameout phenomenon caused when the power of an engine is not matched, thereby improving the controllability and the reliability of products. The control system comprises an engine control module and a rotation speed controller. The control device is connected with the engine control module and the rotation speed controller through signals and used for obtaining a target engine rotation speed value which is matched with a load power according to the load power when the rotation speed of the engine is smaller than a rotation speed threshold value, corresponding to a current gear, of the rotation speed controller. The control device also outputs a rotation speed adjustment control signal to the engine control module so as to control the rotation speed of the engine to be increased to the target rotation speed value.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a limit power matching control system, method, device and construction machinery. Background technique [0002] In order to reduce the cost of the engine and save energy consumption, when selecting the engine type, it is usually not selected according to the maximum power demand of the engine, but according to the power demand that can meet most common working conditions, so that Under certain working conditions, the load power of the engine is greater than the maximum power of the engine. At this time, the engine may stall due to insufficient power. [0003] Ultimate power matching control is a control technology commonly used by construction machinery to prevent engine flameout at present. It can be implemented in various forms, most of which adjust the hydraulic system by changing the swash plate swing angle of the main pump in the load-sensitive variable pump. ...

Claims

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Application Information

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IPC IPC(8): F02D41/24F02D41/04
Inventor 李迎兵刘伟李英智
Owner ZOOMLION HEAVY IND CO LTD
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