阅读说明：本技术 一种电控发动机的节能控制方法和工程机械 (Energy-saving 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 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节能控制方法和工程机械,电控发动机的节能控制方法包括如下步骤：启动发动机按照设定的初始转速工作；控制发动机按照设定的转速控制方式工作设定时间,并采集在设定时间内发动机的转速和扭矩；求得发动机的平均功率,根据驾驶员对发动机需求的目标工作转速在等功率曲线上得到目标功率；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,对应目标功率得到目标比油耗；根据初始比油耗和平均比油耗确定油耗路径；根据发动机的燃油经济区优化油耗路径；按照优化后通过目标比油耗的油耗路径对发动机进行控制。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 an energy-saving control method of an electric control engine and the engineering machinery, wherein the energy-saving control method of the electric control engine comprises the following steps: starting the engine to work according to the set initial rotating speed; controlling the engine to work for a set time according to a set rotating speed control mode, and collecting the rotating speed and the torque of the engine within the set time; obtaining the average power of the engine, and obtaining the target power on an equal power curve according to the target working speed required by a driver for the engine; obtaining initial specific oil consumption corresponding to the initial power, obtaining average specific oil consumption corresponding to the average power, and obtaining target specific oil consumption corresponding to the target power; determining a fuel consumption path according to the initial specific fuel consumption and the average specific fuel consumption; optimizing a fuel consumption path according to a fuel economy area of the engine; and controlling the engine according to the optimized fuel consumption path of the target specific fuel consumption. The invention can make full use of the fuel characteristics of the engine.)

1. An energy-saving control method of an electric control engine is characterized by comprising the following steps:

s1, starting the engine to work according to the set initial rotating speed;

s2, judging whether the load of the engineering machinery is increased, if so, executing a step S3, and if not, continuing working according to a set rotating speed control mode;

s3, controlling the engine to work for a set time according to a set rotating speed control mode, and collecting the rotating speed and the torque of the engine within the set time;

s4, obtaining the average rotating speed and the average torque of the engine within the set time, thus obtaining the average power of the engine, and obtaining the target power on an equipower curve according to the target working rotating speed required by the driver for the engine;

s5, obtaining initial power on an equal power curve according to the initial rotating speed of the engine, obtaining initial specific oil consumption corresponding to the initial power, obtaining average specific oil consumption corresponding to the average power, and obtaining target specific oil consumption corresponding to the target power;

s6, determining a fuel consumption path according to the initial specific fuel consumption and the average specific fuel consumption;

s7, optimizing a fuel consumption path according to a fuel economy area of the engine;

s8, adjusting the optimized oil consumption path according to the target specific oil consumption, so that the oil consumption path passes through the target specific oil consumption;

and S9, controlling the engine according to the optimized fuel consumption path of the target specific fuel consumption.

2. The energy-saving control method of an electrically controlled engine according to claim 1, wherein in said step S2 and said step S3, said set speed control mode is a fixed speed control mode, a fixed throttle control mode or a fixed throttle control multi-rate control mode.

3. The energy-saving control method of the electric control engine according to claim 1, wherein a rotation speed sensor is arranged on the engine and used for acquiring the rotation speed of the engine.

4. The energy-saving control method of the electric control engine according to claim 1, wherein a torque sensor is provided on the engine, and the torque sensor is used for acquiring the torque of the output of the engine.

5. The energy-saving control method of an electrically controlled engine according to claim 1, wherein in step S4, the average power is corrected so that the average power is on an equal power curve.

6. The energy-saving control method of an electric control engine according to claim 5, wherein in step S5, according to a specific fuel consumption chart obtained by testing the engine on an engine bench to obtain corresponding specific fuel consumption under different powers, the initial specific fuel consumption and the average specific fuel consumption can be obtained by searching the initial power and the average power.

7. The energy-saving control method of an electric control engine according to claim 1, wherein in step S6, 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.

8. The energy-saving control method of an electric control engine according to claim 1, wherein in the step S7, the oil consumption path is optimized by using oil consumption MAP obtained by calibrating the engine on an engine bench, so that the oil consumption path is located in the fuel economy zone.

9. The energy-saving control method of the electric control engine according to claim 1, wherein the fuel consumption path is re-planned when the engine is restarted after being stopped.

10. A construction machine, characterized in that an electronically controlled engine of the construction machine is controlled using the energy saving 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 an energy-saving 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 the 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, fixed rotation speed control speed regulation rate and fixed throttle control multi-speed regulation rate. The three types of rotating speed control are single and are widely applied to the engine industry. However, the three methods have poor adaptability to the working conditions, once the working conditions change, the load of the engineering machinery changes, the economical efficiency of oil consumption is difficult to be considered, 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, an energy-saving control method for an electronically controlled engine and a construction machine are needed to solve the above technical problems.

Disclosure of Invention

The invention aims to provide an energy-saving control method of an electric control engine and engineering machinery, which can fully utilize the fuel characteristics of the engine and also can give consideration to the economical efficiency of oil consumption after the load of the engineering machinery is changed, thereby reducing the oil consumption of the engine.

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

an energy-saving control method of an electric control engine comprises the following steps:

s1, starting the engine to work according to the set initial rotating speed;

s2, judging whether the load of the engineering machinery is increased, if so, executing a step S3, and if not, continuing working according to a set rotating speed control mode;

s3, controlling the engine to work for a set time according to a set rotating speed control mode, and collecting the rotating speed and the torque of the engine within the set time;

s4, obtaining the average rotating speed and the average torque of the engine within the set time, thus obtaining the average power of the engine, and obtaining the target power on an equipower curve according to the target working rotating speed required by the driver for the engine;

s5, obtaining initial power on an equal power curve according to the initial rotating speed of the engine, obtaining initial specific oil consumption corresponding to the initial power, obtaining average specific oil consumption corresponding to the average power, and obtaining target specific oil consumption corresponding to the target power;

s6, determining a fuel consumption path according to the initial specific fuel consumption and the average specific fuel consumption;

s7, optimizing a fuel consumption path according to a fuel economy area of the engine;

s8, adjusting the optimized oil consumption path according to the target specific oil consumption, so that the oil consumption path passes through the target specific oil consumption;

and S9, controlling the engine according to the optimized fuel consumption path of the target specific fuel consumption.

Further, in the step S2 and the step S3, the set rotation speed control method is a rotation speed control method of a constant rotation speed control rate, a control method of a constant throttle control rate, or a control method of a constant throttle control multi rate.

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, in step S4, the average power is corrected so that the average power is located on an equal power curve.

Further, in the step S5, according to a specific oil consumption chart obtained by testing the engine on an engine bench to obtain corresponding specific oil consumption under different powers, the corresponding initial specific oil consumption and the corresponding average specific oil consumption can be obtained by searching the initial power and the average power.

Further, in step S6, 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 S7, 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.

Further, when the engine is started again after being stopped, the oil consumption path is planned again.

The engineering machinery controls the electric control engine of the engineering machinery by using the energy-saving control method of the electric control engine.

The invention has the beneficial effects that:

the invention provides an energy-saving control method of an electric control engine, which comprises the steps of firstly starting the engine to work according to a set initial rotating speed, judging whether a load is increased or not, if not, proving that the working condition is not changed, meeting the existing control mode, and continuing to work according to the set rotating speed control mode; if the load is increased, firstly working for a set time according to a set rotating speed control mode, acquiring the rotating speed and the torque of the engine within the set time, obtaining the average power of the engine according to the average rotating speed and the average torque within the set time, obtaining initial power and target power according to an equipower curve, then obtaining initial specific oil consumption, average specific oil consumption and target specific oil consumption, obtaining an oil consumption path according to the initial specific oil consumption and the average specific oil consumption, optimizing the oil consumption path by using a fuel economy area of the engine, simultaneously adjusting the optimized oil consumption path according to the target specific oil consumption to enable the oil consumption path to pass through the target specific oil consumption, and finally controlling the engine according to the optimized oil consumption path passing through the target specific oil consumption. The average rotating speed and the average torque are obtained by working 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 the target specific oil consumption obtained by combining the target power required by a driver is adjusted, so that the oil consumption path passes through the target specific oil consumption. By selecting the rotating speed control mode with low oil consumption, the output power of the engine is ensured, the fuel oil characteristic of the engine can be fully utilized, the oil consumption of the engine is reduced, and the market requirement is met.

According to the engineering machinery provided by the invention, the electronic control engine is controlled by adopting the energy-saving control method of the electronic control engine, the fuel oil characteristic of the engine can be fully utilized, and the economical efficiency of oil consumption can be considered after the load of the engineering machinery is changed, so that the oil consumption of the engine is reduced.

Drawings

FIG. 1 is a flow chart of an energy saving control method of an electronically controlled engine of the present invention;

FIG. 2 is a diagram of the relationship between the engine speed and the engine torque in the energy-saving control method of the electric control engine.

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, the oil consumption required by the engineering machinery with larger working load is very large, and the load of the engineering machinery can change, 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 and also take into account the economical efficiency of fuel consumption after the load of engineering machinery is changed, so as to reduce the fuel consumption of the engine, as shown in fig. 1-2, the invention provides an energy-saving control method of an electric control engine. The energy-saving control method of the electric control engine comprises the following steps:

s1, starting the engine to work according to the set initial rotating speed;

s2, judging whether the load of the engineering machinery is increased, if so, executing a step S3, and if not, continuing working according to a set rotating speed control mode; specifically, a load sensor is arranged on the engineering machinery, when the load of the engineering machinery changes, the load sensor is used for detecting in time, and in other embodiments, the opening degree of an accelerator can be monitored to judge whether the load is increased;

s3, controlling the engine to work for a set time according to a set rotating speed control mode, and collecting the rotating speed and the torque of the engine within the set time;

s4, obtaining the average rotating speed and the average torque of the engine within the set time, thus obtaining the average power of the engine, and obtaining the target power on an equal power curve according to the target working rotating speed required by the driver for the engine;

s5, obtaining initial power on an equal power curve according to the initial rotating speed of the engine, obtaining initial specific oil consumption corresponding to the initial power, obtaining average specific oil consumption corresponding to the average power, and obtaining target specific oil consumption corresponding to the target power;

s6, determining a fuel consumption path according to the initial specific fuel consumption and the average specific fuel consumption;

s7, optimizing a fuel consumption path according to a fuel economy area of the engine;

s8, adjusting the optimized oil consumption path according to the target specific oil consumption, so that the oil consumption path passes through the target specific oil consumption;

and S9, controlling the engine according to the optimized fuel consumption path of the target specific fuel consumption.

If the rotating speed is not increased, the working condition is proved to be unchanged, the existing control mode can be met, and the operation is continued according to the set rotating speed control mode; if the load is increased, the engine works within the set time, and the rotating speed and the torque of the engine are collected to obtain the average rotating speed and the average torque, 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 the target specific oil consumption obtained by combining the target power required by a driver is adjusted, so that the oil consumption path passes through the target specific oil consumption. By selecting the rotating speed control mode with low oil consumption, the output power of the engine can meet the requirements of a driver, the fuel oil characteristics of the engine can be fully utilized, the oil consumption of the engine is reduced, and the market requirements are met.

Further, in step S2 and step S3, the rotational speed control method to be set is a rotational speed control method of a constant rotational speed control rate, a control method of a constant throttle control rate, or a control method of a constant throttle control multi rate. That is, when the construction machine starts to operate, if the load is not increased, it is proved that the existing control method can meet the requirement. Therefore, the traditional rotating speed control mode of controlling the speed regulation rate at a fixed rotating speed, the control mode of controlling the speed regulation rate at a fixed throttle or the control mode of controlling the multi-speed regulation rate at a fixed throttle are adopted for working, the fuel economy can be ensured, the control mode is mature, the control logic is simple, and the requirement under the working condition can be met.

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, in step S4, 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. Specifically, the corresponding power on the equal power curve may be determined according to the average speed, may also be determined according to the average torque, or may be determined according to both the average torque and the average rotation speed.

Further, in step S5, according to a specific fuel consumption chart obtained by testing the engine on the engine mount to obtain corresponding specific fuel consumption under different powers, the corresponding initial specific fuel consumption and average specific fuel 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 S6, 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 S7, 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.

Further, when the engine is started again after being stopped, the oil consumption path is planned again. After the engine is stopped and restarted, new work can be executed, so that the adaptability of the working condition can be improved in the replanning mode, and the economical efficiency of fuel can be ensured on different application occasions by the engineering machinery.

The embodiment also provides the engineering machinery, the electronic control engine of the engineering machinery is controlled by using the energy-saving control method of the electronic control engine, the fuel oil characteristic of the engine can be fully utilized, and the economical efficiency of fuel consumption can be considered after the load of the engineering machinery is changed, so that the fuel consumption of the engine is reduced.

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.