Unlock instant, AI-driven research and patent intelligence for your innovation.

Control method for engine speed of digger machine

A technology of engine speed and control method, which is applied in the direction of engine control, machine/engine, electrical control, etc. It can solve the problems of insufficient adjustment force and unsatisfactory effect, so as to improve the control effect, facilitate technical transformation, improve service life and reliability effect

Inactive Publication Date: 2007-08-15
SANY HEAVY MACHINERY
View PDF0 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the excavator is working under load, all control handles return to the neutral position. At this time, the engine load drops sharply and approaches the no-load state, and the engine speed will be close to the maximum no-load speed. Most or even all of the speed range, so the ESS is not strong enough to adjust the trend of the engine approaching the maximum speed of no load, and the effect is not ideal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Control method for engine speed of digger machine
  • Control method for engine speed of digger machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: A method for controlling the engine speed of an excavator, setting the target engine speed corresponding to the throttle gear, using the engine speed sensing system to control the engine speed, setting at least one warning speed point according to the engine power curve, and controlling the engine speed. The actual speed is detected online. When the actual speed exceeds the minimum warning speed point, the engine throttle signal is overridden, and the throttle opening is adjusted to reduce the target speed of the engine.

[0022] During implementation, referring to the accompanying drawing 2, the main controller of the excavator engine is provided with an ESS control module and a no-load maximum speed control module. When the actual engine speed exceeds the warning speed, the no-load maximum speed control module provides The control signal of the throttle opening has a priority higher than that of the ESS control module, and can perform over-authorization c...

Embodiment 2

[0032] Embodiment 2: A method for controlling the engine speed of an excavator, setting the engine target speed corresponding to the throttle gear, using the engine speed sensing system to control the engine speed, setting at least one warning speed point according to the engine power curve, and controlling the engine speed. The actual speed is detected online. When the actual speed exceeds the minimum warning speed point, the engine throttle signal is overridden, and the throttle opening is adjusted to reduce the target speed of the engine.

[0033] In this embodiment, a two-dimensional fuzzy controller is used to realize the speed control, and the degree of exceeding the warning speed and the change trend of the speed are used as the input of the fuzzy controller, and the adjustment value of the target speed is given by fuzzy control, and according to the target The rotational speed determines the adjustment value of the throttle opening.

Embodiment 3

[0034] Embodiment 3: A method for controlling the engine speed of an excavator, setting the target engine speed corresponding to the throttle gear, using the engine speed sensing system to control the engine speed, setting at least one warning speed point according to the engine power curve, and detecting the engine online The actual speed, main pump pressure, main pump displacement and throttle position parameters, when the actual speed exceeds the minimum warning speed point, calculate the change trend of the actual speed according to the actual speed and the above parameters to determine the adjustment value of the target speed, according to Give the adjustment control signals of the throttle position and the displacement of the main pump, adjust the opening of the throttle and the displacement of the main pump, and reduce the target speed of the engine.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for controlling the rotation speed of digger engine, which uses engine rotation speed sensation system, according to the target speed relative to the shift of throttle to control the speed of engine. The invention is characterized in that based on the power curvature, designing at least one alarm speed point, online checking the real speed of engine, when the real speed is over the minimum alarm speed point, controlling the throttle signal, adjusting the throttle and reducing the target speed of engine. The invention limits the engine speed away from idle maximum speed to reduce the noise level and oil consumption, without affecting the function of engine, to improve service life and reliability of engine.

Description

technical field [0001] The invention relates to a method for controlling the rotational speed of an engine used in engineering machinery, in particular to a method for controlling the rotational speed of an excavator engine, in particular to a method for controlling the maximum rotational speed of the engine at no load. Background technique [0002] Small excavators are widely used in foundation excavation of housing construction and cleaning after completion, urban pipeline laying, farmland water conservancy construction, etc., and have the advantages of flexible construction and high efficiency. [0003] During the working process of the excavator, it is necessary to control the engine speed of the excavator. The traditional excavator engine speed control method is: set the engine target speed corresponding to the throttle gear, and the engine performance at the target speed is optimal under certain conditions (such as maximum output power or lowe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F02D29/00F02D41/14
Inventor 曹显利
Owner SANY HEAVY MACHINERY