CN112081678B - Smoke intensity control method for small excavator - Google Patents
Smoke intensity control method for small excavator Download PDFInfo
- Publication number
- CN112081678B CN112081678B CN202010886549.0A CN202010886549A CN112081678B CN 112081678 B CN112081678 B CN 112081678B CN 202010886549 A CN202010886549 A CN 202010886549A CN 112081678 B CN112081678 B CN 112081678B
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- Prior art keywords
- engine
- vecu
- complete machine
- pressure value
- machine controller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3082—Control of electrical fuel pumps
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2025—Particular purposes of control systems not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/003—Measuring variation of fuel pressure in high pressure line
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses a smoke intensity control method for a small excavator, and belongs to the field of smoke intensity control methods. The method comprises the following steps: the complete machine controller VECU acquires the pressure value of an LS port or a hydraulic pump on the main valve, compares the acquired pressure value with a system set trigger value and confirms whether the acquired pressure value exceeds the system set trigger value or not; if the system setting value is exceeded, the complete machine controller VECU sends a load signal to the engine controller EECU; after receiving the load signal, the engine controller EECU transmits a set current signal to the electronic speed regulator; the electronic speed regulator of the engine controls the holding and recovering time of the rack of the fuel injection pump according to the received current signal, so that the fuel injection time of the engine is delayed. The invention can realize that the smoke intensity emission of the engine meets the requirements of regulations, the cost of the whole engine is basically unchanged, and the problem of poor performance of the whole engine caused by greatly reducing the pump power of the original design scheme is solved.
Description
Technical Field
The invention belongs to a smoke intensity control method, and particularly relates to a smoke intensity control method of a small excavator.
Background
At present, most of engines used by the small excavator are mechanical engines, but not electric control engines. The electronic control engine can accurately adjust the oil injection time through the electronic control ECU of the engine to control the oil injection quantity, so that the engine can constantly work in a black smoke limiting area. The mechanical engine that present small-size excavator used satisfies the emission requirement through increasing electronic governor and electricity accent controller, nevertheless along with the implementation of smoke intensity restriction law, this kind of engine can't be according to the accurate control fuel injection quantity of load, and when complete machine load increases or sudden change, engine fuel injection pump can increase the fuel injection quantity for satisfying the load demand, consequently has the problem that black cigarette exceeds standard to produce often. Aiming at the problem, the whole machine often reduces black smoke by greatly reducing the power of the hydraulic pump, but at the same time, the operation efficiency of the whole machine is obviously reduced, and the operation performance of the whole machine is influenced.
Disclosure of Invention
The invention aims to provide a smoke intensity control method for a small excavator, which aims to overcome the defects that the smoke intensity of the whole excavator is obviously reduced and the operation performance of the whole excavator is influenced because the power of a hydraulic pump is reduced to reduce the smoke when the problem of the standard exceeding of the smoke intensity of the small excavator in the prior art is solved.
The invention is realized by adopting the following technical scheme:
a smoke intensity control method for a small excavator comprises the following specific steps:
step one, a complete machine controller VECU acquires a pressure value of an LS port or a hydraulic pump on a main valve, and the complete machine controller VECU compares the acquired pressure value with a system set trigger value to determine whether the acquired pressure value exceeds the system set trigger value or not;
step two, if the system pressure value exceeds the system set value, the complete machine controller VECU sends a load signal to the engine controller EECU;
step three, after receiving the load signal, the engine controller EECU transmits a set current signal to the electronic speed regulator;
and step four, controlling the holding and recovering time of the oil injection pump rack by the electronic speed regulator of the engine according to the received current signal, and delaying the oil injection time of the engine.
And step two, if the system pressure value exceeds the set value of the system, the complete machine controller VECU transmits a control current signal to the hydraulic pump electromagnetic valve according to the internal setting of the complete machine controller VECU after receiving the system pressure value signal.
And step four, the hydraulic pump adjusts the power of the hydraulic pump and the response time of the hydraulic pump according to a current signal transmitted by the complete machine controller VECU, so that the load of the engine is reduced and slowly changed.
Compared with the prior art, the invention has the beneficial effects that: according to the scheme, the complete machine controller VECU communicates with the engine ECU to transmit a complete machine load signal, the complete machine controller VECU adjusts the corresponding time and the absorbed power of the hydraulic pump, the engine controller EECU controls the maintaining and recovering time of the oil injection rack by adjusting the current of the electronic speed regulator at the same time, the black smoke emission of the complete machine is reduced, the smoke emission of the engine can meet the regulation requirement, the cost of the complete machine is basically unchanged, the maximum benefit is realized, and the problems of poor complete machine performance and the like caused by the fact that the pump power is greatly reduced in the original design scheme are solved.
Drawings
FIG. 1 is a flow chart of the operation of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in figure 1, the smoke intensity control method of the small excavator, disclosed by the invention, is characterized in that a complete machine load signal is transmitted through the communication between a complete machine controller VECU and an engine ECU, the complete machine controller VECU adjusts the corresponding time and absorbed power of a hydraulic pump, and an engine controller EECU realizes the reduction of the black smoke emission of the complete machine by adjusting the current of an electronic speed regulator and controlling the maintaining and recovering time of an oil injection rack at the same time, and comprises the following specific steps:
step one, the complete machine controller VECU collects pressure values of an LS port or a hydraulic pump on a main valve, and the complete machine controller VECU compares the collected pressure values with a system set trigger value to determine whether the collected pressure values exceed the system set trigger value.
Step two, if the system pressure value exceeds the system set value, the complete machine controller VECU sends a load signal to the engine controller EECU; meanwhile, after the complete machine controller VECU receives the system pressure value signal, the control current signal is transmitted to the hydraulic pump electromagnetic valve according to the internal setting of the complete machine controller VECU.
And step three, after receiving the load signal, the engine controller EECU transmits a set current signal to the electronic speed regulator.
Fourthly, the electronic speed regulator of the engine controls the keeping and recovering time of the rack of the fuel injection pump according to the received current signal, so that the fuel injection time of the engine is delayed, and the black smoke problem caused by the sharp increase of the fuel injection quantity is reduced; meanwhile, the hydraulic pump adjusts the power of the hydraulic pump and the response time of the hydraulic pump according to a current signal transmitted by the complete machine controller VECU, so that the load of an engine is reduced and slowly changed, the increase of the fuel injection quantity of the fuel injection pump caused by the load change is reduced, and the discharge of black smoke is reduced.
Claims (3)
1. A smoke intensity control method for a small excavator is characterized by comprising the following steps: the method comprises the following specific steps:
step one, a complete machine controller VECU acquires a pressure value of an LS port or a hydraulic pump on a main valve, and the complete machine controller VECU compares the acquired pressure value with a system set trigger value to determine whether the acquired pressure value exceeds the system set trigger value or not;
step two, if the system pressure value exceeds the system set value, the complete machine controller VECU sends a load signal to the engine controller EECU;
step three, after receiving the load signal, the engine controller EECU transmits a set current signal to the electronic speed regulator;
and step four, controlling the holding and recovering time of the oil injection pump rack by the electronic speed regulator of the engine according to the received current signal, and delaying the oil injection time of the engine.
2. The method of claim 1, wherein the method further comprises: and step two, if the system pressure value exceeds the set value of the system, the complete machine controller VECU transmits a control current signal to the hydraulic pump electromagnetic valve according to the internal setting of the complete machine controller VECU after receiving the system pressure value signal.
3. The method of claim 2, wherein the method further comprises: and step four, the hydraulic pump adjusts the power of the hydraulic pump and the response time of the hydraulic pump according to a current signal transmitted by the complete machine controller VECU, so that the load of the engine is reduced and slowly changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010886549.0A CN112081678B (en) | 2020-08-28 | 2020-08-28 | Smoke intensity control method for small excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010886549.0A CN112081678B (en) | 2020-08-28 | 2020-08-28 | Smoke intensity control method for small excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112081678A CN112081678A (en) | 2020-12-15 |
| CN112081678B true CN112081678B (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010886549.0A Active CN112081678B (en) | 2020-08-28 | 2020-08-28 | Smoke intensity control method for small excavator |
Country Status (1)
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3708563B2 (en) * | 1993-11-04 | 2005-10-19 | 日立建機株式会社 | Drive control device for hydraulic construction machine |
| US5468126A (en) * | 1993-12-23 | 1995-11-21 | Caterpillar Inc. | Hydraulic power control system |
| CN1995721A (en) * | 2005-12-31 | 2007-07-11 | 卡特彼勒公司 | Device and method for controlling fuel jet signal |
| CN103321272A (en) * | 2013-06-27 | 2013-09-25 | 龙工（上海）挖掘机制造有限公司 | Hydraulic excavator power control method in plateau mode |
| CN106762294B (en) * | 2016-11-22 | 2019-03-05 | 天津大学 | A kind of method of flexible control engine combustion mode |
| CN110644564B (en) * | 2019-09-11 | 2021-07-13 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator control system and method |
| CN110820840A (en) * | 2019-11-08 | 2020-02-21 | 雷沃工程机械集团有限公司 | Control method and system for automatically adjusting smoke intensity of excavator |
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2020
- 2020-08-28 CN CN202010886549.0A patent/CN112081678B/en active Active
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| CN112081678A (en) | 2020-12-15 |
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