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Method for preventing failure during engineering machine starting

A technology for construction machinery and faults, which is applied in the direction of mechanical equipment, machines/engines, liquid variable displacement machinery, etc., can solve problems such as black smoke, difficulty in starting diesel engines, and power mismatch between diesel engines and hydraulic main pumps, etc., to achieve The effect of reducing load, solving black smoke and saving cost

Active Publication Date: 2019-04-12
CHTC JOVE HEAVY IND
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preventing failures when construction machinery is started, so as to solve the problem that the power of the diesel engine and the main hydraulic pump do not match during the start-up process of the existing construction machinery, resulting in difficulty in starting the diesel engine and black smoke , to meet the start-up requirements of construction machinery

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  • Method for preventing failure during engineering machine starting
  • Method for preventing failure during engineering machine starting
  • Method for preventing failure during engineering machine starting

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Embodiment Construction

[0023] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims.

[0024] see figure 2 with image 3 , a method for preventing construction machinery from malfunctioning during start-up according to the present invention, wherein the start-up control system of the construction machinery includes an instrument display 1, a main controller 2, an engine controller (that is, an engine ECU) 3, an electronically controlled diesel engine 4 , The hydraulic main pump 5 and the electric proportional control valve 6, the instrument display and the engine controller are respectively connected with the main controller, the electronically controlled diesel engine is connected with the engine controller, and the input end of the hydraulic main pump is connected with the output end of the electronically controlled diesel engine , the e...

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Abstract

The invention discloses a method for preventing failure during engineering machine starting. The starting process is divided into two stages, specifically, in the first stage, a main controller controls the absorption power of a hydraulic main pump through an electric proportional control valve to be increased to 3-10% of the target power of the hydraulic main pump at the rate k1; in the second stage, the main controller controls the absorption power of the hydraulic main pump through the electric proportional control valve to be increased to the target power of the hydraulic main pump at therate k2; and the first stage is the former 0.6-1s of the starting process, and the rate k2 is 2-6 times of the rate k1. In the starting process, the absorption power of the hydraulic main pump is controlled to be matched with the power of a diesel engine, the load of the diesel engine in the initial stage of starting is reduced, thus the diesel engine can be started normally, and the problem of black smoke during load starting of the diesel engine is avoided; and a starting control system of an engineering machine does not need to be transformed, and the transformation cost is saved.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a method for preventing faults when the engineering machinery is started. Background technique [0002] At present, the power / torque of the main hydraulic pumps of construction machinery such as excavators, horizontal directional drilling rigs, and rotary drilling rigs have been set, so when the construction machinery starts, the absorbed power of the hydraulic pump will quickly ramp up to target power as figure 1 shown. However, under low temperature conditions or high altitude areas, due to reasons such as hydraulic oil viscosity or air density, construction machinery will have difficulty in starting and black smoke. [0003] Chinese patent application 201310098134.7 discloses a start-up control system and start-up control method for construction machinery engines. The starting control system of the engineering machinery engine includes: a power supply; a heate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D29/04F04B1/26
CPCF02D29/04F04B1/26
Inventor 刘祥彪刘健李国平
Owner CHTC JOVE HEAVY IND
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