阅读说明：本技术 一种电控发动机的转速控制方法和工程机械 (Rotating speed control method of electric control engine and engineering machinery ) 是由 王新富 钟志兴 苏永志 曾超 黄福东 韦开焕 廖江正 谢业俊 韦光明 于 2021-08-17 设计创作，主要内容包括：本发明涉及工程机械技术领域,尤其涉及一种电控发动机的转速控制方法和工程机械,电控发动机的转速控制方法包括如下步骤：S1、启动发动机按照初始转速和初始扭矩工作,并使发动机按照设定的转速控制方式工作设定时间；S2、采集在设定时间内发动机的转速和扭矩；S3、求得设定时间内,发动机的平均转速和平均扭矩,从而求得发动机的平均功率；S4、根据初始转速和初始扭矩获得初始功率,对应初始功率获得初始比油耗,对应平均功率获得平均比油耗；S5、根据初始比油耗和平均比油耗确定油耗路径；S6、根据发动机的燃油经济区优化油耗路径；S7、按照优化后的油耗路径对发动机的转速进行控制。本发明能够充分利用发动机的燃油特性。(The invention relates to the technical field of engineering machinery, in particular to a rotating speed control method of an electric control engine and the engineering machinery, wherein the rotating speed control method of the electric control engine comprises the following steps: s1, starting the engine to work according to the initial rotating speed and the initial torque, and enabling the engine to work for a set time according to a set rotating speed control mode; s2, collecting the rotating speed and the torque of the engine within a set time; s3, obtaining the average rotating speed and the average torque of the engine within the set time, thereby obtaining the average power of the engine; s4, obtaining initial power according to the initial rotating speed and the initial torque, obtaining initial specific oil consumption corresponding to the initial power, and obtaining average specific oil consumption corresponding to the average power; s5, determining a fuel consumption path according to the initial specific fuel consumption and the average specific fuel consumption; s6, optimizing a fuel consumption path according to a fuel economy area of the engine; and S7, controlling the rotating speed of the engine according to the optimized fuel consumption path. The invention can make full use of the fuel characteristics of the engine.)

1. A method for controlling the rotating speed of an electric control engine is characterized by comprising the following steps:

s1, starting the engine to work according to the initial rotating speed and the initial torque, and enabling the engine to work for a set time according to a set rotating speed control mode;

s2, collecting the rotating speed and the torque of the engine within the set time;

s3, calculating the average rotating speed and the average torque of the engine in the set time, and calculating the average power of the engine;

s4, obtaining initial power according to the initial rotating speed and the initial torque, obtaining initial specific oil consumption corresponding to the initial power, and obtaining average specific oil consumption corresponding to the average power;

s5, determining a fuel consumption path according to the initial specific fuel consumption and the average specific fuel consumption;

s6, optimizing a fuel consumption path according to a fuel economy area of the engine;

and S7, controlling the rotating speed of the engine according to the optimized oil consumption path.

2. A rotation speed control method of an electronically controlled engine according to claim 1, wherein in step S1, the set rotation speed control mode is a constant rotation speed control mode or a constant throttle control mode.

3. The method of claim 1, wherein a speed sensor is provided on the engine, and the speed sensor is used for acquiring the speed of the engine.

4. The method of claim 1, wherein a torque sensor is provided on the engine, and the torque sensor is used for acquiring torque of the output of the engine.

5. A rotation speed control method of an electrically controlled engine according to claim 1, wherein the initial power is on an equal power curve.

6. The method of claim 1, wherein in step S3, the average power is corrected so that the average power is on an equal power curve.

7. The method of claim 6, wherein in step S4, the engine is tested on an engine bench, specific oil consumption corresponding to different powers is obtained, a specific oil consumption chart is prepared, and the initial specific oil consumption and the average specific oil consumption corresponding to the initial power and the average power are obtained by searching the initial power and the average power.

8. The method of claim 1, wherein in step S5, a fuel consumption path is determined by connecting the point of the initial specific fuel consumption and the point of the average specific fuel consumption.

9. The method of claim 1, wherein in step S6, the fuel consumption path is optimized by using a fuel consumption MAP obtained by calibrating the engine on an engine bench, so that the fuel consumption path is located in the fuel economy zone.

10. A construction machine, characterized in that an electronically controlled engine of the construction machine is controlled using the rotational speed control method of an electronically controlled engine according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a rotating speed control method of an electric control engine and the engineering machinery.

Background

With the gradual increase of the usage amount of fossil fuel, the fossil fuel is greatly consumed, and in order to save the fossil fuel, engineers continuously improve the energy-saving characteristic of the engine.

The engineering machinery is a main use object of fossil energy, and in the prior art, the rotation speed control of an electrically controlled engine of the engineering machinery generally comprises fixed throttle control speed regulation rate and fixed rotation speed control speed regulation rate. The two types of rotating speed control are single and are widely applied to the engine industry. However, the two methods have poor adaptability to working conditions, and the fuel characteristics of the engine cannot be fully utilized, so that the oil consumption is high, the fuel cost is high, and the market requirements cannot be met.

Therefore, a method for controlling the rotation speed of an electronically controlled engine and a construction machine are needed to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a rotating speed control method of an electric control engine and engineering machinery, which can make full use of the fuel oil property of the engine, thereby reducing the oil consumption of the engine and meeting the market demand.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for controlling the rotating speed of an electric control engine comprises the following steps:

s1, starting the engine to work according to the initial rotating speed and the initial torque, and enabling the engine to work for a set time according to a set rotating speed control mode;

s2, collecting the rotating speed and the torque of the engine within the set time;

s3, calculating the average rotating speed and the average torque of the engine in the set time, and calculating the average power of the engine;

s4, obtaining initial power according to the initial rotating speed and the initial torque, obtaining initial specific oil consumption corresponding to the initial power, and obtaining average specific oil consumption corresponding to the average power;

s5, determining a fuel consumption path according to the initial specific fuel consumption and the average specific fuel consumption;

s6, optimizing a fuel consumption path according to a fuel economy area of the engine;

and S7, controlling the rotating speed of the engine according to the optimized oil consumption path.

In step S1, the set rotation speed control method is a constant rotation speed control rate adjustment control method or a constant throttle control rate adjustment control method.

Further, a rotating speed sensor is arranged on the engine and used for collecting the rotating speed of the engine.

Further, a torque sensor is arranged on the engine and used for collecting the torque output by the engine.

Further, the initial power is located on an equal power curve.

Further, in step S3, the average power is corrected so that the average power is located on an equal power curve.

Further, in the step S4, the engine is tested on an engine bench, the specific oil consumption corresponding to different powers is obtained, a specific oil consumption chart is prepared, and the initial specific oil consumption and the average specific oil consumption corresponding to the initial power and the average power are obtained by searching the initial power and the average power.

Further, in step S5, a fuel consumption path is determined by connecting the point of the initial specific fuel consumption and the point of the average specific fuel consumption.

Further, in the step S6, the fuel consumption path is optimized by using a fuel consumption MAP obtained by calibrating the engine on an engine mount, so that the fuel consumption path is located in the fuel economy zone.

A construction machine controls an electric control engine of the construction machine by using the rotating speed control method of the electric control engine.

The invention has the beneficial effects that:

the invention provides a rotating speed control method of an electric control engine, which comprises the steps of firstly starting the engine to work, working for a set time, collecting the rotating speed and the torque of the engine within the set time, obtaining the average rotating speed and the average torque of the engine, obtaining the average power of the engine, obtaining the corresponding average specific oil consumption and the corresponding initial specific oil consumption according to the average power and the initial power of the engine, obtaining an oil consumption path, optimizing the oil consumption path by utilizing a fuel economy area of the engine, and controlling the rotating speed of the engine according to the optimized oil consumption path. The average rotating speed and the average torque are obtained by operating the engine within the set time and collecting the rotating speed and the torque of the engine, so that the average power is obtained, the average power can effectively reflect the performance of the engine within the set time, an oil consumption path is obtained according to the average specific oil consumption and the initial specific oil consumption, the oil consumption path is optimized according to a fuel economy area, and a rotating speed control mode with low oil consumption is selected, so that the fuel consumption characteristic of the engine can be fully utilized while the output power of the engine is ensured, the oil consumption of the engine is reduced, and the market requirements are met.

According to the engineering machinery provided by the invention, the electric control engine is controlled by adopting the rotating speed control method of the electric control engine, so that the engine can meet the operating requirement of working condition load, the adaptability of the working condition is improved, meanwhile, the fuel oil characteristic of the engine is fully utilized, the fuel oil consumption of the engine is reduced, and the fuel oil economy is improved.

Drawings

FIG. 1 is a flow chart of a method of controlling rotational speed of an electronically controlled engine in accordance with the present invention;

fig. 2 is a diagram of the relationship between the engine speed and the torque in the method for controlling the engine speed according to the invention.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The engineering machinery needs a large amount of use in the daily infrastructure process, and the oil consumption required by the engineering machinery with a large working load is very large, so that how to effectively ensure the output power of the engine and simultaneously reduce the oil consumption of the engine is a technical problem. In order to fully utilize the fuel characteristics of an engine, reduce the fuel consumption of the engine, improve the fuel economy and meet the market demand, as shown in fig. 1-2, the invention provides a rotating speed control method of an electric control engine. The method for controlling the rotating speed of the electronic control engine comprises the following steps:

s1, starting the engine to work according to the initial rotating speed and the initial torque, and enabling the engine to work for a set time according to a set rotating speed control mode;

s2, collecting the rotating speed and the torque of the engine within a set time;

s3, obtaining the average rotating speed and the average torque of the engine within the set time, thereby obtaining the average power of the engine;

s4, obtaining initial power according to the initial rotating speed and the initial torque, obtaining initial specific oil consumption corresponding to the initial power, and obtaining average specific oil consumption corresponding to the average power;

s5, determining a fuel consumption path according to the initial specific fuel consumption and the average specific fuel consumption;

s6, optimizing a fuel consumption path according to a fuel economy area of the engine;

and S7, controlling the rotating speed of the engine according to the optimized fuel consumption path.

The average rotating speed and the average torque are obtained by operating the engine within the set time and collecting the rotating speed and the torque of the engine, so that the average power is obtained, the average power can effectively reflect the performance of the engine within the set time, an oil consumption path is obtained according to the average specific oil consumption and the initial specific oil consumption, the oil consumption path is optimized according to a fuel economy area, and a rotating speed control mode with low oil consumption is selected, so that the fuel characteristics of the engine can be fully utilized while the output power of the engine is ensured, the oil consumption of the engine is reduced, and the market requirements are met.

Further, in step S1, the rotational speed control method to be set is a rotational speed control method in which the rotational speed control rate is fixed or a throttle control rate is fixed. That is to say, when the engineering machinery starts to work, the fuel consumption path is not obtained at this time, so the traditional rotating speed control mode of controlling the speed regulation rate at the fixed rotating speed or the control mode of controlling the speed regulation rate at the fixed throttle are adopted for working, and the rotating speed and the torque of the engine within the set time are convenient to acquire. Specifically, the rotation speed control mode of the fixed rotation speed control rate adjustment or the control mode of the fixed throttle control rate adjustment is the prior art, and will not be described herein in detail.

Furthermore, a rotating speed sensor is arranged on the engine and used for collecting the rotating speed of the engine. The rotating speed sensor can detect the rotating speed output by the engine in real time, so that a curve of the rotating speed output by the engine can be obtained within set time, and then the average rotating speed within the set time can be obtained by using the curve of the rotating speed output. By the mode, the average torque obtained in the set time can accurately reflect the rotating speed output state of the engine.

Further, a torque sensor is arranged on the engine and used for collecting the torque output by the engine. The torque sensor can detect the torque output by the engine in real time, so that a curve of the torque output by the engine can be obtained within a set time, and then the average torque within the set time can be obtained by using the output curve of the torque. By the mode, the average torque obtained in the set time can accurately reflect the torque output state of the engine.

Further, the point corresponding to the initial power is located on the equal power curve. The initial power is adopted by the point on the equal power curve, so that the output power of the engine is unchanged, and the output capacity of the engine is ensured when the engine works within the set time, thereby ensuring the working efficiency within the set time.

Further, in step S3, the average power is corrected so that the average power is on the equal power curve. The average power is adjusted to the equal power curve, so that the specific oil consumption of the engine under the corresponding power can be conveniently obtained according to the test of the engine on the engine pedestal, the difficulty of data processing is reduced, and the accuracy can be ensured by using the data obtained by the test when the engine leaves a factory.

Further, in step S4, the engine is tested on the engine mount to obtain the corresponding specific oil consumption under different powers and to make a specific oil consumption chart, and the corresponding initial specific oil consumption and average specific oil consumption can be obtained by searching the initial power and the average power. Because the engine is tested on the engine rack in advance of the actual work of the engine, when the engineering machinery is actually used, the corresponding numerical value can be obtained by directly searching the specific oil consumption chart according to the initial power and the average power, the operation is convenient and quick, and the actual work of the engineering machinery is not influenced.

Further, in step S5, the fuel consumption path is determined by connecting the point of the initial specific fuel consumption and the point of the average specific fuel consumption. By the method, a specific oil consumption path can be simply determined, and then calculation optimization is carried out according to the fuel economy area to determine an optimized path.

Further, in step S6, the fuel consumption path is optimized by using the fuel consumption MAP obtained by calibrating the engine on the engine mount, so that the fuel consumption path is located in the fuel economy area. The points on the oil consumption path can be optimized by searching the oil consumption MAP, so that the points on the oil consumption path are positioned in the fuel economy area as much as possible, and the fuel economy of the optimized oil consumption path is better.

By analyzing fig. 2, it can be seen that the initial power in the high oil consumption area is adjusted to the target power in the low oil consumption area by optimizing the path, so that the oil consumption is reduced on the premise of ensuring that the output torque of the engine is not changed. In this embodiment, the target power is only a point on the isopower curve located in the low fuel consumption area, and may be adjusted according to the needs of the driver, which is not limited herein. By the mode, the optimal fuel economy is realized by optimizing the specific fuel consumption passing path of the operating working condition point and selecting the rotating speed control mode of low specific fuel consumption. The engine can meet the operating requirement of working condition load, and can obtain good fuel economy, and the working condition adaptability is strong.

The embodiment also provides the engineering machinery, the electronic control engine of the engineering machinery is controlled by using the rotating speed control method of the electronic control engine, and the fuel oil characteristic of the engine can be fully utilized, so that the oil consumption of the engine is reduced, and the market requirement is met. In this embodiment, the construction machine includes a road roller, a bulldozer, an excavator, and the like.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.