A speed control method of construction machinery engine

A technology for engine controllers and construction machinery, applied in engine control, machines/engines, combustion engines, etc., can solve problems such as large fluctuations in engine speed, poor action coordination, and poor dynamic response, so as to improve operation coordination , Renovation cost is low, and the effect of saving fuel costs

CN103541825BInactive Publication Date: 2016-03-02SHANGHAI SANY HEAVY IND
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-03-02
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for controlling the revolving speed of engineering mechanical engines and belongs to the field of mechanical control. The method comprises the steps that by judging load increase which is smaller than or equal to the range of 50-70%, a main controller 1 sends a constant revolving speed control method to an engine controller 2, and a gas engine 3 keeps the revolving speed unchanged; if the load does not increase or increase larger than the range of 50-70%, the main controller 1 sends a constant throttle control method to the engine controller 2, and the revolving speed of the gas engine 3 decreases according to a speed regulation curve. According to the method, different control methods are adopted according to hydraulic load changes, overlarge speed decrease of loading is prevented, overlarge speed increase of unloading is prevented, stationarity of the revolving speed of an excavator during the whole operation is ensured, and therefore, operation coordination of the integral machine is ensured.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of mechanical equipment control, and relates to a control method, in particular to a speed control method suitable for construction machinery engines of excavators. Background technique

[0002] In recent years, with the increasing requirements for environmental protection and energy saving, gas fuel engines have been re-emphasized and developed, especially for vehicles fueled by compressed natural gas (CNG), liquefied natural gas (LNG) and liquefied petroleum gas (LPG). Countries all over the world have been promoted very quickly, and also promoted the progress of gas fuel engine technology. Studies have shown that the emissions of CO, CO2, PM (soot particles) and NMHC (unburned hydrocarbons other than methane) produced by gaseous fuel engines have been greatly reduced, and NOx has also been improved to varying degrees (depending on the differences of different engines, the mixture The quality of the gas formed, the...

Examples

Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0031] Embodiments of the present invention will be specifically explained below in conjunction with the accompanying drawings.

[0032] figure 1 It is the schematic diagram of electronically controlled engine control. The main controller (MC) 1 collects the output load rate of the gas engine 3 ...