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A Method for Preventing Faults When Construction Machinery Starts

A technology for construction machinery and faults, applied in mechanical equipment, machines/engines, liquid variable-capacity machinery, etc., can solve problems such as the mismatch between the power of the diesel engine and the hydraulic main pump, the difficulty of starting the diesel engine, and the emission of black smoke. Solve the effect of black smoke, cost saving and load reduction

Active Publication Date: 2021-06-08
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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  • A Method for Preventing Faults When Construction Machinery Starts
  • A Method for Preventing Faults When Construction Machinery Starts
  • A Method for Preventing Faults When Construction Machinery Starts

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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 and 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 el...

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Abstract

The invention discloses a method for preventing faults when construction machinery is started. The start-up process is divided into two stages: in the first stage, the main controller controls the absorbed power of the hydraulic main pump to increase at a rate of k1 through an electric proportional control valve to 3-10% of its target power; in the second stage, the main controller controls the absorbed power of the hydraulic main pump to rise to its target power at a rate of k2 through the electric proportional control valve; the first stage is the first 0.6-10% of the start-up process 1s, the rate k2 is 2 to 6 times of the rate k1. The invention controls the absorbed power of the hydraulic main pump to match the power of the diesel engine during the starting process, reducing the initial load of the diesel engine, enabling the diesel engine to start normally, and avoiding black smoke when the diesel engine starts with load. Problem: The present invention does not need to modify the start-up control system of construction machinery, which saves the cost of modification.

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...

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Application Information

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Patent Type & Authority Patents(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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