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System and method for starting and stopping protection of diesel engine of excavator

A diesel engine, shutdown protection technology, applied in the direction of machine/engine, engine control, mechanical equipment, etc., can solve problems such as damage, surge voltage damage, carbon deposition, etc., to avoid startup and shutdown, eliminate surge voltage, optimize The effect of the work environment

Active Publication Date: 2012-10-24
SUNWARD INTELLIGENT EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working environment of excavators is complex and changeable, and the working conditions are harsh
Due to the negligence and bad habits of the operator, the diesel engine runs at high speed at low temperature or directly turns off at high speed. Component damage due to surge voltage generated by the generator

Method used

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  • System and method for starting and stopping protection of diesel engine of excavator
  • System and method for starting and stopping protection of diesel engine of excavator
  • System and method for starting and stopping protection of diesel engine of excavator

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] Taking a 21-ton hydraulic excavator as an example, the rated speed of the machine is 2100 rpm, the low idle speed is 1000 rpm, the maximum torque is 550Nm, and the maximum torque corresponds to a speed of 1600 rpm.

[0027] see figure 1 As shown, in a specific embodiment of the present invention, the excavator diesel engine startup and shutdown protection system includes a diesel engine, a storage battery, an electromagnetic power switch, a speed sensor, a flameout motor, a flameout relay, a central controller, and a coolant temperature sensor. , Oil pressure sensor, key switch, engine throttle control system and electrical equipment. The rotational speed sensor, coolant temperature sensor, engine oil pressure sensor, and key switch are respectively connected to the input end of the central controller; the main electromagnetic power switch, flameout r...

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Abstract

The invention discloses a system and a method for starting and stopping protection of a diesel engine of an excavator. The system comprises a diesel engine, a storage battery, an electromagnetic battery main switch, a rotating speed sensor, a starting motor, a starting relay, a flameout relay, a central controller, a cooling liquid temperature sensor, an engine oil pressure sensor, a key switch, an engine throttle control system and the other electric equipment. The rotating speed sensor, the cooling liquid temperature sensor, the engine oil pressure sensor and the key switch are respectively connected with input ends of the central controller; the electromagnetic battery main switch, the flameout relay, the starting relay and the engine throttle control system are respectively connected with output ends of the central controller; and the central controller and the electric equipment are powered up by the storage battery. According to the method based on the system, the functions of low-speed starting, low-speed flameout and delay outage of the engine are realized, the diesel engine and the other electric equipment are protected, and reliability of the diesel engine and the electric equipment can be improved.

Description

technical field [0001] This patent belongs to the technical field of excavator control, and relates to an excavator diesel engine startup and shutdown protection system and method. technical background [0002] Excavator diesel engines are widely used in construction machinery because of their low-speed and high-torque characteristics. With the development of electronic technology and its wide application in construction machinery, the fully adjustable speed diesel engine controlled by motor has become the mainstream. The working environment of excavators is complex and changeable, and the working conditions are harsh. Due to the negligence and bad habits of the operator, the diesel engine runs at high speed at low temperature or directly turns off at high speed. Component damage due to surge voltage generated by the generator. Contents of the invention [0003] The technical problem to be solved in this patent is to propose an excavator diesel engine startup and shutdo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D43/00
Inventor 郝鹏胡剑平陶海军何耀军姜鹏
Owner SUNWARD INTELLIGENT EQUIP CO LTD
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