Control method for oil-gas separator operating motor

Abstract

A control method for an oil-gas separator operating motor, to overcome the problem that existing oil-gas separator control strategies cannot, after regulation and control, implement the lowest possible operating rotation speed while meeting operation requirements. The method comprises: acquiring actual working parameters output when multiple groups of motors operate in a target working state, and, on the basis of the parameters, establishing mapping relationships, and associating each mapping relationship and drawing a relationship comparison table; collecting partial working parameters of a currently operating motor, querying the mapping relationships in the relationship comparison table, and using the other obtained parameters as a basis to adjust the corresponding parameter data, until the currently operating motor reaches a target working state.

Description

A method for controlling an oil-gas separator operating motor Technical Field

[0001] The present invention relates to the field of oil-gas separator motor control strategies, and in particular to a method for controlling an oil-gas separator operating motor. Background Art

[0002] With the continuous advancement of engine technology and the increasing intensity of engine operating conditions, oil vapor caused by the crankcase ventilation system has invaded the intake system, causing widespread carbon deposits in the engine. Therefore, oil-gas separators are widely used in the field of engine operation as an effective device to solve this problem. The oil-gas separator can keep the entire engine intake system, including the throttle, intake manifold, intake duct, and intake valve, dry and oil-free, fundamentally eliminating the formation of carbon deposits in the intake system. The motor speed operation control strategy in the oil-gas separator can control the oil-gas separator. However, the existing control strategy only relies on simple mechanical control methods. When the oil-gas separator is working, the method of simply changing the speed of the motor lacks a control basis, and it is difficult to guarantee the operating loss after control, which may accelerate component wear.

[0003] For example, a "gas-oil separator, engine and control method" disclosed in a Chinese patent document, with publication number CN114427488A, includes an gas-oil separator including a filter assembly, a base plate and a first drive assembly. The filter assembly includes a first baffle and a filter element. The first baffle and the filter element are spaced apart and arranged on the base plate, and the first baffle can rotate relative to the base plate. The first drive assembly drives the first baffle to rotate to adjust the angle between the first baffle and the filter element. The gas-oil separator in this embodiment of the scheme can also effectively separate water and oil in the airflow. However, this method only controls the operation of the gas-oil separator by physically driving the assembly through the drive setting. To a certain extent, it lacks an investigation into the factors affecting the different operating stages of the gas-oil separator. Therefore, it lacks a basis for regulation and control, and it is difficult to ensure that the regulation achieves the best effect. Technical issues

[0004] The present invention mainly solves the problem that the existing oil-gas separator control strategy cannot achieve the lowest possible operating speed after regulation while meeting the operating requirements; a method for controlling the oil-gas separator operating motor is proposed, which determines the actual working state of the engine according to the actual working parameter signal output by the motor operation, sets a relationship comparison table corresponding to each parameter, and combines the different influencing factors in each state through the comparison table to change the rotor speed, adjust the internal pressure of the engine, and ensure the pressure environment for normal operation of the engine; under the premise of meeting the product separation efficiency, the product operating speed is minimized to reduce unnecessary loss of parts. Technical Solutions

[0005] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0006] The present invention includes: obtaining the actual operating parameters output by several groups of motors when operating in a target operating state, establishing mapping relationships based on the parameters, associating the mapping relationships and drawing a relationship comparison table; collecting some operating parameters of the currently operating motor and querying the mapping relationships in the relationship comparison table, and using the obtained other parameters as a basis for adjusting the corresponding parameter data until the currently operating motor reaches the target operating state. By establishing a mapping relationship for each parameter of the motor during operation, various influencing factors are more comprehensively considered when calculating the operating speed; querying according to the pre-established relationship comparison table can improve the overall control efficiency, achieve rapid adjustment of the motor operating parameters, and obtain the optimal motor speed control result without affecting the separation efficiency.

[0007] Preferably, the actual operating parameters include, but are not limited to, motor speed, output torque, mean effective pressure, and blowby volume; mapping relationships are established for each of the aforementioned operating parameters, and data on influencing factors is collected and plotted as a relationship comparison table; based on the comparison table, the remaining parameters are queried and adjusted according to any two sets of parameters to achieve control of the currently operating motor's operating state. Based on a preset mapping relationship, the relationship comparison table searches for the remaining parameters that meet the requirements based on the currently selected parameters, and uses these parameters as target parameters, facilitating rapid location of the parameter target value and significantly improving control efficiency.

[0008] Preferably, the current motor speed and output torque are used as query parameters, and a predetermined blowby volume data is obtained based on a mapping relationship. The predetermined blowby volume data is then compared with the current blowby volume data, and the corresponding influencing factors are adjusted based on the comparison results, thereby adjusting the blowby volume difference to within a specified error threshold. Based on the corresponding relationship between speed, output torque, and blowby volume, the target blowby volume data is retrieved. This design allows the motor to control the blowby volume, assuming that the current speed and output torque meet the minimum standard requirements, thereby maximally meeting the motor's operating speed requirements.

[0009] Preferably, the influencing factors corresponding to the blowby amount include but are not limited to the motor temperature difference; the motor temperature before cooling is obtained and the difference between the current motor temperature is obtained to obtain the motor temperature difference; a coefficient relationship is established based on the oil temperature and the blowby amount, and the target oil temperature is obtained according to the established blowby amount and the coefficient relationship, and the oil temperature is adjusted and operated until it is detected that the difference between the current blowby amount and the established blowby amount is within the error threshold, and the adjustment is completed. The preset error threshold, once it reaches the threshold, the adjustment can be stopped. This design can effectively improve the adjustment efficiency and prevent a single adjustment from taking too much time, thereby affecting the separation efficiency of the oil-gas separator; in addition, when adjusting the temperature, it is necessary to adjust it in combination with the normal temperature range of the motor. If the target temperature is higher or lower than the temperature range of the motor's normal operation, the adjustment is stopped; the above settings can effectively ensure the safety of the motor operation.

[0010] Preferably, the current motor speed and mean effective pressure are used as query parameters, and the predetermined output torque data is obtained based on a mapping relationship. The predetermined output torque is then compared with the current output torque, and the corresponding influencing factors are adjusted based on the comparison results, thereby adjusting the output torque difference to within a specified error threshold. Based on the mapping relationship between the motor speed, mean effective pressure, and output torque, the output torque data is defined and adjusted, which can achieve the desired operating effect through output torque adjustment while maintaining the fixed pressure balance within the motor and the specified minimum speed.

[0011] Preferably, the factors influencing the output torque include, but are not limited to, an accelerator pedal signal; the current accelerator pedal signal of the engine is obtained to determine the engine torque; a related control module controls the rotation of a corresponding control valve based on the oil-gas separation flow rate and separation efficiency, thereby changing the accelerator pedal signal; and the adjustment is completed until the difference between the current output torque and the predetermined output torque falls within an error threshold. Adjustment of the output torque is inseparable from the oil-gas separation flow rate and separation efficiency. By adjusting the control valve angle, the current output torque is changed according to a preset target torque. Once the adjustment result reaches the error threshold, adjustment is stopped, ensuring adjustment efficiency.

[0012] Preferably, the current motor blowby volume and mean effective pressure are used as query parameters, and a predetermined speed data is obtained based on a mapping relationship. The predetermined speed data is then compared with the current speed, and the corresponding influencing factors are adjusted based on the comparison results, thereby adjusting the speed difference to within a specified error threshold. Based on the mapping relationship between blowby volume, mean effective pressure, and speed, and after defining the first two parameters, the minimum motor speed that meets the target operating effect is determined, which can significantly reduce the wear of related components and reduce device operating losses.

[0013] Preferably, the factors affecting the speed data include but are not limited to the motor speed level; if it is a stepless motor, it is directly adjusted to the predetermined speed; if it is a variable speed motor, the corresponding level of the variable speed motor is first determined based on the predetermined speed comparison, and the variable speed motor is adjusted to the target level after analysis; the target level is the lowest level among the several levels of the variable speed motor whose rated speed is not lower than the target speed. This solution analyzes the stepless motor and the stepped variable speed motor separately, which increases the flexibility and applicability of the overall solution; in addition, the speed of the motor is adjusted according to the predetermined blowby volume and average effective pressure, so that the adjustment can be stopped when the speed difference meets the maximum value of the error threshold. This design effectively achieves the adjustment goal of the motor running at the minimum speed under given conditions, minimizing motor losses.

[0014] Preferably, a floating threshold is set according to each parameter, and the current motor speed and average effective pressure data are input in sequence. The remaining parameters obtained by querying the relationship comparison table are compared with the corresponding current parameters. If the difference is within the floating range, the control process is judged to be terminated. If the difference is outside the floating threshold range, the adjustment is continued until the judgment is satisfied. The adjusted data is continuously tested until all parameters meet the standards, and then the adjustment can be stopped. This step can effectively prevent a single parameter from not meeting the target operating results. In addition, any two sets of data can be input according to the actual situation to query the correctness of the remaining parameters, which is convenient for re-adjustment. Beneficial effects

[0015] A method for controlling an oil-gas separator operating motor according to the present invention can adjust the remaining parameters within a minimum range according to the predetermined parameters of the oil-gas separator when the oil-gas separator is operating, so that the oil-gas separator can reach an optimal operating state while meeting the target operating conditions. This method can significantly reduce the loss of motor components, increase the service life of the motor, and ensure the control efficiency, thereby avoiding affecting the operating efficiency of the oil-gas separator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a flow chart of a method for controlling a cloud core motor of an oil-gas separator according to the present invention.

[0017] FIG2 is a schematic diagram of a method for controlling an oil-gas separator operating motor according to the present invention. Modes for Carrying Out the Invention

[0018] The technical solution of the present invention will be further specifically described below through embodiments and in conjunction with the accompanying drawings. Example

[0019] A method for controlling an oil-gas separator operating motor according to the present embodiment, as shown in FIG2 , includes obtaining actual operating parameters output by several groups of motors when operating in a target operating state, establishing mapping relationships based on the parameters, associating the mapping relationships and drawing a relationship comparison table; collecting some operating parameters of the currently operating motor and querying the mapping relationships in the relationship comparison table, and using the obtained other parameters as a basis for adjusting corresponding parameter data until the currently operating motor reaches the target operating state.

[0020] The actual working parameters of the motor mentioned above include but are not limited to the motor operating speed, output torque, average effective pressure and blowby volume; mapping relationships are established for the above working parameters respectively and the influencing factor data are collected and drawn into a relationship comparison table, which contains multiple mapping relationships for motor operating speed, output torque, blowby volume, motor operating speed, average effective pressure, output torque, blowby volume, average effective pressure, and motor operating speed; in addition, while recording the mapping relationship, all the common components of the peripheral factors that may be affected by the above parameters are added in the additional attributes as a relationship comparison table; when initiating adjustment, it is necessary to initiate a query operation based on any two sets of parameters based on the comparison table, and query the results in the table of the remaining parameters according to the relationship comparison table, and adjust the remaining parameters within the preset threshold as the target result to achieve control of the working status of the currently running motor.

[0021] Specifically, the adjustment process includes the following: using the current motor operating speed and output torque as query parameters, obtaining the established blowby volume data according to the mapping relationship, comparing the established blowby volume data with the current blowby volume data, and adjusting the corresponding influencing factors according to the comparison results, thereby adjusting the blowby volume difference to within the specified error threshold. Using the current motor operating speed and mean effective pressure as query parameters, obtaining the established output torque data according to the mapping relationship, comparing the established output torque with the current output torque, and adjusting the corresponding influencing factors according to the comparison results, thereby adjusting the output torque difference to within the specified error threshold. Using the current motor blowby volume and mean effective pressure as query parameters, obtaining the established speed data according to the mapping relationship, comparing the established speed data with the current speed, and adjusting the corresponding influencing factors according to the comparison results, thereby adjusting the speed difference to within the specified error threshold.

[0022] The above adjustment process is detailed as follows: factors influencing the blowby amount include, but are not limited to, motor temperature differences; the motor temperature before cooling is obtained and the difference between the current motor temperature is calculated to obtain the motor temperature difference; a coefficient relationship is established between the oil temperature and the blowby amount, and a target oil temperature is calculated based on the predetermined blowby amount and coefficient relationship. The oil temperature is adjusted and the system is operated until the difference between the current blowby amount and the predetermined blowby amount is within an error threshold, completing the adjustment. Factors influencing the output torque include, but are not limited to, the accelerator pedal signal; the current accelerator pedal signal of the engine is obtained to determine the engine torque; the relevant control module controls the rotation of the corresponding control valve based on the oil-gas separation flow rate and separation efficiency, thereby changing the accelerator pedal signal; the system is operated until the difference between the current output torque and the predetermined output torque is within an error threshold, completing the adjustment. Factors affecting the speed data include but are not limited to the motor speed level; if it is a stepless motor, it is directly adjusted to the established speed; if it is a variable speed motor, the corresponding level of the variable speed motor is first determined based on the established speed comparison, and after analysis, the variable speed motor is adjusted to the target level; the target level is the lowest level among several levels of the variable speed motor whose rated speed is not lower than the target speed.

[0023] After a single adjustment is completed, it is necessary to set floating thresholds for each parameter, input the current motor speed and average effective pressure data, or any other two sets of parameters in turn, and then compare the remaining parameters obtained from the query relationship table with the corresponding current parameters. If the difference is within the floating range, the control process is judged to be terminated. If the difference is outside the floating threshold range, the adjustment is continued until the judgment is met. The adjusted data is continuously tested until all parameters meet the standards, and then the adjustment can be stopped. This step can effectively prevent a single parameter from not meeting the target operating results. In addition, any two sets of data can be input according to the actual situation to query the correctness of the remaining parameters, which is convenient for further adjustment to prevent any parameters from being missed in detection or adjustment.

[0024] As shown in Figure 1, the process of this method is carried out in the following steps:

[0025] Step 1: Obtain the standard parameters of the motor in the target working state and establish a mapping relationship based on the preset order and influencing factors, and then draw a unified relationship comparison table;

[0026] Step 2: Collect any two sets of operating parameters of the current motor and use them as query parameters 1 and 2 to initiate a query.

[0027] Step 3: If query parameter 1 is the motor speed, go to step 4; otherwise go to step 5;

[0028] Step 4: If query parameter 2 is output torque, proceed to step 6; if query parameter 2 is mean effective pressure, proceed to step 7; otherwise, adjust the query parameter order and return to step 3;

[0029] Step 5: If query parameter 1 is the blowby amount and query parameter 2 is the mean effective pressure, proceed to step 8; otherwise, an error is reported.

[0030] Step 6: Obtain target blowby volume data from a table based on the motor's operating speed and output torque, adjust the blowby volume, and then proceed to Step 9;

[0031] Step 7: Obtain target output torque data from a table based on the motor speed and mean effective pressure, adjust the output torque, and then proceed to step 9;

[0032] Step 8: Obtain target motor speed data based on blowby volume and mean effective pressure by looking up the table and adjusting the motor speed, then proceed to step 9;

[0033] Step 9: Select any two groups of all the adjusted parameters as the review parameter query relationship comparison table, and then compare the remaining parameters with the target remaining parameters until the difference is within the range of n~m and stop adjusting.

[0034] A method for controlling an oil-gas separator operating motor in this embodiment can adjust the remaining parameters within a minimum range based on the established parameters when the oil-gas separator is working, so that it can reach the optimal operating state while meeting the target operating conditions. It can significantly reduce the loss of motor components, enhance the service life of the motor, and ensure the control efficiency, thereby avoiding affecting the operating efficiency of the oil-gas separator.

[0035] It should be understood that the embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

Claims

1. A method for controlling an oil-gas separator operating motor, characterized in that: include: Acquire actual working parameters output by several groups of motors when they are running in a target working state, establish mapping relationships according to the parameters, associate the mapping relationships and draw a relationship comparison table; Collect some working parameters of the currently running motor and query the mapping relationship in the relationship comparison table, and use the other parameters obtained as the basis to adjust the corresponding parameter data until the currently running motor reaches the target working state.

2. The oil-gas separator operation motor control method according to claim 1, characterized in that: The actual working parameters include but are not limited to the motor operating speed, output torque, mean effective pressure and blowby volume; mapping relationships are established for the above working parameters respectively and the influencing factor data are collected and drawn into a relationship comparison table; based on the comparison table, the remaining parameters are queried and adjusted according to any two groups of parameters to achieve control of the working status of the current running motor.

3. The oil-gas separator operation motor control method according to claim 2, characterized in that: Also includes: The current motor operating speed and output torque are used as query parameters, and the established blowby amount data is obtained according to the mapping relationship. The established blowby amount data is compared with the current blowby amount data, and the corresponding influencing factors are adjusted according to the comparison result, so as to adjust the blowby amount difference to within the specified error threshold.

4. The oil-gas separator operation motor control method according to claim 3, characterized in that: The influencing factors corresponding to the blowby amount include but are not limited to the motor temperature difference; the motor temperature before cooling is obtained and the difference between the current motor temperature is obtained to obtain the motor temperature difference; a coefficient relationship is established based on the oil temperature and the blowby amount, and the target oil temperature is obtained according to the established blowby amount and the coefficient relationship, and the oil temperature is adjusted and then operated until it is detected that the difference between the current blowby amount and the established blowby amount is within the error threshold, and the adjustment is completed.

5. The oil-gas separator operation motor control method according to claim 2, characterized in that: Also includes: The current motor speed and mean effective pressure are used as query parameters, and the predetermined output torque data is obtained according to the mapping relationship. The predetermined output torque is compared with the current output torque, and the corresponding influencing factors are adjusted according to the comparison result, so as to adjust the output torque difference to within the specified error threshold.

6. The oil-gas separator operation motor control method according to claim 5, characterized in that: The influencing factors of the output torque include but are not limited to the accelerator pedal signal; the current accelerator pedal signal of the engine is obtained to determine the engine torque; the relevant control module controls the rotation of the corresponding control valve according to the flow rate and separation efficiency of the oil and gas separation, thereby changing the accelerator pedal signal; and the operation is performed until the difference between the current output torque and the established output torque is within the error threshold, and the adjustment is completed.

7. The oil-gas separator operation motor control method according to claim 2, characterized in that: Also includes: The current motor blowby volume and mean effective pressure are used as query parameters, and the predetermined speed data is obtained according to the mapping relationship. The predetermined speed data is compared with the current speed, and the corresponding influencing factors are adjusted according to the comparison results, so as to adjust the speed difference to within the specified error threshold.

8. The oil-gas separator operation motor control method according to claim 7, characterized in that: The influencing factors of the speed data include but are not limited to the motor speed level; if it is a stepless motor, it is directly adjusted to the established speed; if it is a variable speed motor, the corresponding level of the variable speed motor is first determined according to the established speed comparison, and the variable speed motor is adjusted to the target level after analysis; the target level is the lowest level among several levels of variable speed motors whose rated speed is not lower than the target speed.

9. A method for controlling an oil-gas separator operating motor according to claim 4, 6 or 8, characterized in that: Also includes: Set the floating threshold according to each parameter, input the current motor speed and average effective pressure data in turn, compare the remaining parameters obtained by querying the relationship comparison table with the corresponding current parameters, and if the difference is within the floating range, the control process is judged to be over. If the difference is outside the floating threshold range, continue to adjust until the judgment is met.

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