阅读说明：本技术 一种柴油机限负荷功能的方法 (Method for load limiting function of diesel engine ) 是由 郝红光 李福海 孙培涛 马群 李生业 陶有武 于 2019-09-20 设计创作，主要内容包括：本发明公开了一种柴油机限负荷功能的方法,包括如下步骤：S1：柴油机与油缸连接的管道上加装负荷电磁阀,限负荷电磁阀内安装有油尺位移传感器,柴油机内旋转的叶轮上安装的测速传感器与限负荷电磁阀被控制器控制,并与外部带有显示屏的检测器以及检测数据的监控仪,每个柴油机的叶轮转速点对应一个油尺位移上限；每个转速点对应一个油尺位移上限,用计划调度与算法调度结合的控制方法,弥补了单纯算法不足,当达到该转速点对应的上限后,限负荷电磁阀方可进行工作,当实际油尺位移大于当前转速对应的油尺位移上限时,限负荷电磁阀工作,同时限负荷指示灯以及蜂鸣器工作,限负荷电磁阀不会一直带电。(The invention discloses a method for limiting the load function of a diesel engine, which comprises the following steps: s1: a load electromagnetic valve is additionally arranged on a pipeline which is connected with an oil cylinder of the diesel engine, a dipstick displacement sensor is arranged in the load limiting electromagnetic valve, a speed measuring sensor and the load limiting electromagnetic valve which are arranged on an impeller rotating in the diesel engine are controlled by a controller, and correspond to a detector with a display screen and a monitor for detecting data, and the rotating speed point of the impeller of each diesel engine corresponds to an upper limit of the dipstick displacement; each rotating speed point corresponds to an upper limit of displacement of the oil dipstick, the shortage of a pure algorithm is overcome by a control method combining planning scheduling and algorithm scheduling, the load limiting electromagnetic valve can work after the upper limit corresponding to the rotating speed point is reached, when the actual displacement of the oil dipstick is larger than the upper limit of the displacement of the oil dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, the load limiting indicating lamp and the buzzer work, and the load limiting electromagnetic valve cannot be electrified all the time.)

1. A method for limiting the load function of a diesel engine is characterized by comprising the following steps:

s1: a load electromagnetic valve is additionally arranged on a pipeline which is connected with an oil cylinder of the diesel engine, a dipstick displacement sensor is arranged in the load limiting electromagnetic valve, a speed measuring sensor and the load limiting electromagnetic valve which are arranged on an impeller rotating in the diesel engine are controlled by a controller, and correspond to a detector with a display screen and a monitor for detecting data, and the rotating speed point of the impeller of each diesel engine corresponds to an upper limit of the dipstick displacement;

s2: during bench test, the recording array displays parameters of rotating speed-displacement of the oil dipstick on a display screen after analog-to-digital conversion in a detector according to analog signals measured by a speed measuring sensor and an oil dipstick displacement sensor, records the parameters of the rotating speed and the displacement of the oil dipstick in real time, sets the parameters of the upper limit of the rotating speed-displacement of the oil dipstick according to the parameters, and selects four groups of data to input into a monitor;

s3: the monitor calculates the linear relation of the rotation speed and the displacement upper limit of the dipstick according to the four groups of data input in the step S2, and determines the displacement upper limit of the dipstick corresponding to each input rotation speed data when the rotation speed is lower than the set rotation speed;

s4: when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, the load limiting indicator lamp and the buzzer work, after the upper limit corresponding to the rotating speed is reached, the load limiting electromagnetic valve can work as a condition to be set as a planning condition, the load limiting electromagnetic valve is set, when the diesel engine is lower than the set rotating speed, the condition that the displacement of the dipstick is not higher than the upper limit is set as an algorithm condition, the priority of the planning condition is higher than that of the algorithm condition, and when the triggering condition of the planning condition is met, the instruction of the planning condition is preferentially;

s5: the triggering conditions of the planning conditions and the algorithm conditions include, but are not limited to, time, rotation speed, current, temperature and other related variables, and also include combination conditions, and the planning conditions are prioritized over the algorithm conditions as long as a triggering process meeting the planning conditions occurs.

2. The method for limiting the load of the diesel engine according to claim 1, wherein in step S2, for the "rotation speed-dipstick displacement" parameter: the actual parameters of the rotating speed and the maximum load at the current rotating speed.

3. The method of claim 1, wherein in step S2, a representative parameter "upper limit of speed-dipstick displacement" is selected in step S2.

4. The method for load limiting function of diesel engine according to claim 1, wherein for the "rotation speed-dipstick displacement upper limit" parameter in step S3: and (4) alarming parameters of the displacement of the dipstick at the rotating speed and the current rotating speed.

5. The method of claim 1, wherein the control of the planning conditions in step S5 includes an oil absorption process, an oil injection process, a speed measurement process, and a rotation process.

Technical Field

The invention relates to the technical field of diesel engine load functions, in particular to a method for limiting the load function of a diesel engine.

Background

When the diesel engine is started or the load is overlarge, the speed regulator can drive the rocker arm to act according to mechanical characteristics in order to meet the requirement of the rotating speed of the diesel engine, and before the actual rotating speed is lower than the set rotating speed, the oil dipstick is controlled to increase the displacement of the oil dipstick all the time, so that the oil supply amount is increased all the time, and poor emission can be caused.

The load limiting electromagnetic valve is configured, when the diesel engine is lower than a set rotating speed, the load limiting electromagnetic valve is electrified to work, so that the displacement of the oil dipstick is not higher than the upper limit, when the diesel engine is lower than the set rotating speed for a long time, the load limiting electromagnetic valve works all the time, the service life of the electromagnetic valve can be influenced, and meanwhile, the load limiting indicating lamp and the buzzer can work to influence the work of operators.

Disclosure of Invention

In order to solve the problems, each rotating speed point corresponds to an upper limit of displacement of the dipstick, the load limiting electromagnetic valve can work after the upper limit corresponding to the rotating speed point is reached, when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, the load limiting indicating lamp and the buzzer work, the load limiting electromagnetic valve cannot be electrified all the time, and the service life of the electromagnetic valve is prolonged; when the rotating speed is between the operating rotating speed and the set rotating speed, the overload alarming function is realized,

to this end, according to one aspect of the present invention, there is provided a method for a load limiting function of a diesel engine, comprising the steps of:

s1: a load electromagnetic valve is additionally arranged on a pipeline which is connected with an oil cylinder of the diesel engine, a dipstick displacement sensor is arranged in the load limiting electromagnetic valve, a speed measuring sensor and the load limiting electromagnetic valve which are arranged on an impeller rotating in the diesel engine are controlled by a controller, and correspond to a detector with a display screen and a monitor for detecting data, and the rotating speed point of the impeller of each diesel engine corresponds to an upper limit of the dipstick displacement;

s2: during bench test, the recording array displays parameters of rotating speed-displacement of the oil dipstick on a display screen after analog-to-digital conversion in a detector according to analog signals measured by a speed measuring sensor and an oil dipstick displacement sensor, records the parameters of the rotating speed and the displacement of the oil dipstick in real time, sets the parameters of the upper limit of the rotating speed-displacement of the oil dipstick according to the parameters, and selects four groups of data to input into a monitor;

s3: the monitor calculates the linear relation of the rotation speed and the displacement upper limit of the dipstick according to the four groups of data input in the step S2, and determines the displacement upper limit of the dipstick corresponding to each input rotation speed data when the rotation speed is lower than the set rotation speed;

s4: when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, the load limiting indicator lamp and the buzzer work, after the upper limit corresponding to the rotating speed is reached, the load limiting electromagnetic valve can work as a condition to be set as a planning condition, the load limiting electromagnetic valve is set, when the diesel engine is lower than the set rotating speed, the condition that the displacement of the dipstick is not higher than the upper limit is set as an algorithm condition, the priority of the planning condition is higher than that of the algorithm condition, and when the triggering condition of the planning condition is met, the instruction of the planning condition is preferentially;

s5: the triggering conditions of the planning conditions and the algorithm conditions include, but are not limited to, time, rotation speed, current, temperature and other related variables, and also include combination conditions, and the planning conditions are prioritized over the algorithm conditions as long as a triggering process meeting the planning conditions occurs.

In some embodiments, for the "rotation speed-dipstick displacement" parameter in step S2: the actual parameters of the rotating speed and the maximum load at the current rotating speed.

In some embodiments, a representative "speed-dipstick displacement upper limit" parameter is selected for step S2.

In some embodiments, for the "rotation speed-dipstick displacement upper limit" parameter in step S3: and (4) alarming parameters of the displacement of the dipstick at the rotating speed and the current rotating speed.

In some embodiments, the control of the planning condition includes an oil suction process, an oil injection process, a speed measurement process, and a rotation process in step S5.

Compared with the prior art, the invention has the beneficial effects that: according to the method for limiting the load of the diesel engine, each rotating speed point corresponds to an upper limit of displacement of the dipstick, the defect of pure algorithm is overcome by a control method combining planning scheduling and algorithm scheduling, on the basis of the original algorithm, the increase of planning conditions is manually set in advance to overcome the defect of algorithm scheduling, when the upper limit corresponding to the rotating speed point is reached, the load limiting electromagnetic valve can work, when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, a load limiting indicator lamp and a buzzer work, the load limiting electromagnetic valve cannot be electrified all the time, and the service life of the electromagnetic valve is prolonged; when the rotating speed is between the operating rotating speed and the set rotating speed, the overload alarming function is achieved.

Drawings

Fig. 1 is a flowchart of a method for limiting the load of a diesel engine according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 schematically shows a flow chart of a method for limiting the load of a diesel engine according to the present invention, and as shown in fig. 1, the present embodiment comprises the following steps:

s1: the load electromagnetic valve is additionally arranged on a pipeline which is connected with the diesel engine and the oil cylinder, the oil gauge displacement sensor is arranged in the load-limiting electromagnetic valve, the oil gauge displacement data detected by the oil gauge displacement sensor can control the on-off state of the load-limiting electromagnetic valve, the speed measuring sensor and the load-limiting electromagnetic valve which are arranged on the rotating impeller in the diesel engine are controlled by the controller, and the speed measuring sensor and the load-limiting electromagnetic valve are connected with a detector with a display screen and a monitor for detecting data;

s2: when bench test, record array shows the parameter of "rotational speed-dipstick displacement", rotational speed-dipstick displacement "parameter through the analog-to-digital conversion back in the detector according to the analog signal that speed sensor and dipstick displacement sensor surveyed: actual parameters of the rotating speed and the maximum load at the current rotating speed are recorded in real time, parameters of rotating speed-displacement upper limit of the oil dipstick are set according to the parameters, four groups of data are selected to be input into a monitor, and representative parameters of rotating speed-displacement upper limit of the oil dipstick, 3000r/min, 3500r/min, 4000r/min and 4500r/min are selected;

s3: the monitor calculates the linear relation of the rotating speed and the upper limit of displacement of the dipstick according to the data of 3000r/min, 3500r/min, 4000r/min and 4500r/min input in the step S2, and the parameter of the rotating speed and the upper limit of displacement of the dipstick is: the method comprises the steps that a parameter for alarming the large displacement of the dipstick at the rotating speed and the current rotating speed determines the upper limit of the displacement of the dipstick corresponding to each input rotating speed data when the rotating speed is lower than a set rotating speed, and the rotating speed interval in which a load-limiting electromagnetic valve can work is between the operating rotating speed and the set rotating speed;

s4: when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load limiting electromagnetic valve works, and meanwhile, the load limiting indicator lamp and the buzzer work, after the upper limit corresponding to the rotating speed is reached, the load limiting electromagnetic valve can work as a condition to be set as a planning condition, the load limiting electromagnetic valve is set, when the diesel engine is lower than the set rotating speed, the condition that the displacement of the dipstick is not higher than the upper limit is set as an algorithm condition, the priority of the planning condition is higher than that of the algorithm condition, and when the triggering condition of the planning condition is met, the instruction of the planning condition is preferentially;

s5: the triggering conditions of the plan condition and the algorithm condition include but are not limited to time, rotating speed, current, temperature and other related variables, and also include a combination condition, as long as a triggering process meeting the plan condition occurs, the plan condition takes precedence over the algorithm condition, and the control of the plan condition comprises an oil suction process, an oil injection process, a speed measurement process and a rotation process.

Each rotating speed point corresponds to an upper limit of displacement of the dipstick, the shortage of a pure algorithm is made up by a control method combining planning scheduling and algorithm scheduling, on the basis of the original algorithm, a planning condition is increased and manually set in advance to make up the defect of algorithm scheduling, when the upper limit corresponding to the rotating speed point is reached, the load-limiting electromagnetic valve can work, when the actual displacement of the dipstick is larger than the upper limit of the displacement of the dipstick corresponding to the current rotating speed, the load-limiting electromagnetic valve works, and meanwhile, the load-limiting indicator light and the buzzer work, the load-limiting electromagnetic valve cannot be electrified all the time, and the service life of the electromagnetic valve is prolonged; when the rotating speed is between the operating rotating speed and the set rotating speed, the overload alarming function is achieved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.