Method for testing performance of electrically controlled silicone oil water pump clutch

Abstract

The application relates to a performance test method of an electric control silicon oil water pump clutch, which comprises the following steps: controlling the electric control silicon oil water pump through PID+feedforward table closed loop control, so that the silicon oil water pump rotating speed is stably kept at 65%+ / -5 of the engagement degree, thereby realizing that the electric control silicon oil water pump is heated as soon as possible; and the performance of the electric control silicon oil water pump clutch is verified through the control open loop control or the PID+feedforward table closed loop control of PWM variation.

Description

TECHNICAL FIELD

[0001] The present application relates to an electric control silicon oil water pump clutch, in particular to a performance test method of an electric control silicon oil water pump clutch. BACKGROUND

[0002] The electric control silicon oil water pump of the automobile is an important part of the cooling system of the automobile engine, and its main function is to replace the direct connection water pump to reduce the energy consumption of the whole vehicle. Whether the electric control silicon oil water pump clutch can meet the requirements of the automobile cooling system needs to verify the performance of the electric control silicon oil water pump clutch.

[0003] At present, there is no method for quickly verifying the performance test of the electric control silicon oil water pump clutch, so a method for verifying the performance of the electric control silicon oil water pump clutch needs to be developed. SUMMARY

[0004] To solve the above problems, the present application provides a performance test method of an electric control silicon oil water pump clutch, which can quickly, efficiently and accurately verify the response performance, modulation performance and closed-loop calibration performance of the electric control silicon oil water pump clutch.

[0005] The technical scheme adopted by the present application is: a performance test method of an electric control silicon oil water pump clutch, including response performance test, modulation performance test and closed-loop calibration test,

[0006] The specific steps of the response performance test are as follows:

[0007] A) Install the electric control silicon oil water pump clutch on the equipment, then connect the water pump pipeline with the equipment pipeline, and connect the wire harness connector with the equipment;

[0008] B) Input the required input speed and the required voltage value of the solenoid coil in the equipment, and then preheat the clutch;

[0009] C) Input the main shaft running speed and run the equipment;

[0010] D) Ensure that the initial value of the pulse duty cycle is 0%, and the silicon oil water pump impeller can be stabilized at the idle speed condition, and start recording data;

[0011] E) Adjust the pulse duty cycle from 0% to 100% directly, ensure that the pulse duty cycle is 100% for 60s, and then decrease from 100% to 0% directly until the water pump impeller speed is stabilized at the lowest speed;

[0012] The specific steps of the modulation performance test are as follows:

[0013] A) Install the electric control silicon oil water pump clutch on the test equipment, then connect the water pump pipeline with the equipment pipeline, and connect the wire harness connector with the equipment;

[0014] B) Input the required input speed and the required voltage value of the solenoid coil in the equipment, then preheat the clutch;

[0015] C) Input the required running speed, and run the equipment;

[0016] D) Ensure that the initial value of the pulse duty cycle is 0%, and the impeller of the silicon oil pump can be stabilized at the idle speed condition, and start recording the data;

[0017] E) Automatically adjust the pulse duty cycle from 0% to 100% at a constant speed, and then from 100% to 0% at a constant speed;

[0018] The specific steps of the closed-loop calibration test are as follows:

[0019] A) Install the electric control silicon oil pump clutch on the equipment, then connect the pump pipeline with the equipment pipeline, and connect the wire harness connector with the equipment;

[0020] B) Input the required input speed and the required voltage value of the solenoid coil in the equipment, then preheat the clutch;

[0021] C) Calibrate the feedforward table:

[0022] First, input the required input speed, then set the target speed of the pump impeller, then perform a step test on the pump impeller speed, at this time the pump impeller speed will automatically reach the set speed and remain stable, record the PWM value at this time, fill in the table, adjust the next pump impeller speed, wait for the pump impeller speed to remain stable, and record the PWM value at this time in the table, until all values in the table are completed; adjust the engine to the next speed, set the pump impeller speed as above, record the PWM value, until all values in the table are completed;

[0023] D) Calibrate the PID value:

[0024] First, set P = 0.005, I = 0, D = 0, the engine speed is constant, the target speed of the pump impeller is stepped up, and the actual speed of the pump impeller is observed whether it can reach the target speed, if not, increase the P value; if overshoot, decrease the P value; the actual speed of the silicon oil pump impeller can reach the target speed ± 200 rpm each time, at this time the P value is fixed;

[0025] Set P = the value determined in the previous step, I = 0.005, D = 0, the engine speed is constant, the target speed of the pump impeller is stepped up, and the actual speed of the pump impeller is observed whether it can reach the target speed; if not, increase the I value; if overshoot, decrease the I value; the actual speed of the silicon oil pump impeller can reach the target speed ± 100 rpm each time, at this time the I value is fixed;

[0026] Set P = the value determined in the previous step, I = the value determined in the previous step, and D = 0.05. With the engine speed constant, the target speed of the water pump impeller increases stepwise. Observe whether the actual speed of the water pump impeller can reach the target speed. If it cannot, decrease the value of D; if it overshoots, increase the value of D. The actual speed of the silicone oil water pump impeller can reach the target speed ±100 rpm each time, and the value of D is fixed at this time.

[0027] The pump impeller speed was controlled according to the above feedforward table and PID parameters to verify the stability of the pump impeller speed.

[0028] E) Input the required speed from the customer. The impeller target speed increases by 100 rpm every 90 seconds from the lowest controllable speed until the impeller speed is fully engaged. Then the speed decreases by 100 rpm every 90 seconds until the impeller speed reaches the lowest controllable speed. Record the impeller speed, input the speed, impeller target speed and PWM value.

[0029] This invention can quickly, efficiently, and accurately verify the response performance, modulation performance, and closed-loop calibration performance of an electronically controlled silicone oil water pump clutch.

[0030] The beneficial effects achieved by this invention are: by using PID + feedforward table closed-loop control of the electronically controlled silicone oil water pump, the speed of the silicone oil water pump is stabilized at 65%±5 of the meshing degree, thereby enabling the electronically controlled silicone oil water pump to warm up quickly; by controlling the open-loop control or PID + feedforward table closed-loop control of PWM changes, the performance of the electronically controlled silicone oil water pump clutch can be quickly verified to meet the requirements. Attached Figure Description

[0031] Figure 1 For response performance test curves;

[0032] Figure 2 Modulation performance test curve;

[0033] Figure 3 Calibrate the feedforward curve;

[0034] Figure 4 This is the closed-loop calibration curve. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] like Figures 1-4 As shown, the performance testing method for the electronically controlled silicone oil water pump clutch of the present invention includes response performance testing, modulation performance testing, and closed-loop calibration testing.

[0037] The response performance test procedure is as follows:

[0038] A) Install the electronically controlled silicone oil water pump clutch on the equipment, then connect the water pump pipeline to the equipment pipeline, and connect the wiring harness connector to the equipment.

[0039] B) Input the required input speed and the required voltage value of the solenoid coil into the equipment. Then preheat the clutch (impeller speed is 65% ± 5 of the input speed, run for about 2 minutes, the running time is adjustable);

[0040] C) Input the spindle speed and start the equipment;

[0041] D) Ensure the initial pulse duty cycle is 0%, and that the silicone oil water pump impeller is stable at idle speed before starting data recording;

[0042] E) Adjust the pulse duty cycle from 0% directly to 100%, and maintain the pulse duty cycle at 100% for 60 seconds (holding time T). D (Adjustable), then decrease directly from 100% to 0% until the pump impeller speed stabilizes at the lowest speed, such as Figure 1 t: engagement time, T: disengagement time;

[0043] The modulation performance test procedure is as follows:

[0044] A) Install the electronically controlled silicone oil water pump clutch on the test equipment, then connect the water pump pipeline to the equipment pipeline, and connect the wiring harness connector to the equipment;

[0045] B) Input the required input speed and the required voltage value of the solenoid coil into the equipment; then preheat the clutch (the impeller speed is 65%±5 of the input speed, run for about 2 minutes, the running time is adjustable);

[0046] C) Input the required operating speed and run the equipment;

[0047] D) Ensure the initial pulse duty cycle is 0%, and that the silicone oil water pump impeller is stable at idle speed before starting data recording;

[0048] E) Automatically adjust the pulse duty cycle to rise uniformly from 0% to 100%, and then decrease uniformly from 100% to 0% (each rise and fall phase takes 20 minutes; if there are special requirements for the test input conditions, follow those requirements). Figure 2 ;

[0049] The closed-loop calibration performance test procedure is as follows:

[0050] A) Install the electronically controlled silicone oil water pump clutch on the equipment, then connect the water pump pipeline to the equipment pipeline, and connect the wiring harness connector to the equipment;

[0051] B) Input the required input speed and the required voltage value of the solenoid coil in the device, then preheat the clutch (the impeller speed is 65% ± 5 of the input speed, and the running time is about 2 minutes, which can be adjusted);

[0052] C) Calibrate the feedforward table:

[0053] First, input the required input speed, then set the target speed of the water pump impeller, and then perform a step test on the water pump impeller speed, see Figure 3 . At this time, the water pump impeller speed will automatically reach the set speed and remain stable (the difference between the water pump impeller speed and the target speed is ± 100 rpm), and the PWM value at this time is recorded and filled in the feedforward table. Adjust the next water pump impeller speed, wait for the water pump impeller speed to remain stable, and record the PWM value at this time in the table until all values in the table are completed. Adjust the engine to the next speed, set the water pump impeller speed as above, and record the PWM value until all values in the table are completed;

[0054] D) Calibrate the PID value:

[0055] First, set P = 0.005, I = 0, and D = 0. The engine speed is constant, the target speed of the water pump impeller is stepped up, and the actual speed of the water pump impeller is observed to see if it can reach the target speed. If not, increase the P value; if overshoot, decrease the P value. The actual speed of the silicon oil water pump impeller can reach the target speed (± 200 rpm) each time, and the P value is fixed at this time.

[0056] Set P = the value determined in the previous step, I = 0.005, and D = 0. The engine speed is constant, the target speed of the water pump impeller is stepped up, and the actual speed of the water pump impeller is observed to see if it can reach the target speed. If not, increase the I value; if overshoot, decrease the I value. The actual speed of the silicon oil water pump impeller can reach the target speed (± 100 rpm) each time, and the I value is fixed at this time.

[0057] Set P = the value determined in the previous step, I = the value determined in the previous step, and D = 0.05. The engine speed is constant, the target speed of the water pump impeller is stepped up, and the actual speed of the water pump impeller is observed to see if it can reach the target speed. If not, decrease the D value; if overshoot, increase the D value. The actual speed of the silicon oil water pump impeller can reach the target speed (± 100 rpm) each time, and the D value is fixed at this time.

[0058] Control the water pump impeller speed according to the above feedforward table and PID parameters to verify the stability of the water pump impeller speed, as shown in Figure 4 :

[0059] E) Input customer required input speed, impeller target speed from the lowest controllable speed every 90s increase 100rpm until the impeller speed fully engaged, then the speed every 90s decrease 100rpm until the impeller speed reaches the lowest controllable speed. Record the impeller speed, input speed, impeller target speed, PWM value.

[0060] The basic principle and main structural features of the present application are shown and described above. The present application is not limited by the above examples, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for testing the performance of an electronically controlled silicone oil water pump clutch, characterized in that: This includes response performance testing, modulation performance testing, and closed-loop calibration testing. The specific steps for the response performance test are as follows: A) Install the electronically controlled silicone oil water pump clutch on the equipment, then connect the water pump pipeline to the equipment pipeline, and connect the wiring harness connector to the equipment; B) Input the required input speed and the required voltage value of the solenoid coil into the equipment, and then preheat the clutch; C) Input the spindle speed and start the equipment; D) Ensure the initial pulse duty cycle is 0%, and that the silicone oil water pump impeller is stable at idle speed before starting data recording; E) Adjust the pulse duty cycle from 0% directly to 100%, ensuring the pulse duty cycle is 100% for 60 seconds, and then decrease it directly from 100% to 0% until the pump impeller speed stabilizes at the minimum speed. The specific steps of the modulation performance test are as follows: A) Install the electronically controlled silicone oil water pump clutch on the test equipment, then connect the water pump pipeline to the equipment pipeline, and connect the wiring harness connector to the equipment; B) Input the required speed and voltage value of the solenoid coil into the equipment; then preheat the clutch. C) Input the required operating speed and run the equipment; D) Ensure the initial pulse duty cycle is 0%, and that the silicone oil water pump impeller is stable at idle speed before starting data recording; E) Automatically adjust the pulse duty cycle to rise uniformly from 0% to 100%, and then decrease uniformly from 100% to 0%; The specific steps of the closed-loop calibration test are as follows: A) Install the electronically controlled silicone oil water pump clutch on the equipment, then connect the water pump pipeline to the equipment pipeline, and connect the wiring harness connector to the equipment; B) Input the required speed and voltage value of the solenoid coil into the equipment; then preheat the clutch. C) Calibrate the feedforward table: First, input the required speed, then set the target speed of the water pump impeller. Next, perform a step test on the water pump impeller speed. The impeller speed will automatically reach the set speed and remain stable. Record the PWM value at this time and fill it into the table. Adjust the next water pump impeller speed and wait for it to stabilize. Record the PWM value at this time into the table. Repeat this process until all values ​​in one row of the table are complete. Then, adjust the engine to the next speed and set the water pump impeller speed using the same method, recording the PWM value. Repeat this process until all values ​​in the table are complete. D) Calibrate the PID value: First, set P = 0.005, I = 0, D = 0. With the engine speed constant, the target speed of the water pump impeller increases stepwise. Observe whether the actual speed of the water pump impeller can reach the target speed. If not, increase the P value; if there is overshoot, decrease the P value. The actual speed of the silicone oil water pump impeller can reach the target speed ±200 rpm each time, at which point the P value is fixed. Set P = the value determined in the previous step, I = 0.005, D = 0, with the engine speed constant, the target speed of the water pump impeller increases stepwise, and observe whether the actual speed of the water pump impeller can reach the target speed; if not, increase the value of I; if there is overshoot, decrease the value of I; the actual speed of the silicone oil water pump impeller can reach the target speed ±100 rpm each time, at which point the value of I is fixed; Set P = the value determined in the previous step, I = the value determined in the previous step, and D = 0.

05. With the engine speed constant, the target speed of the water pump impeller increases stepwise. Observe whether the actual speed of the water pump impeller can reach the target speed. If it cannot, decrease the value of D; if it overshoots, increase the value of D. The actual speed of the silicone oil water pump impeller can reach the target speed ±100 rpm each time, and the value of D is fixed at this time. The pump impeller speed was controlled according to the above feedforward table and PID parameters to verify the stability of the pump impeller speed. E) Input the required speed from the customer. The impeller target speed increases by 100 rpm every 90 seconds from the lowest controllable speed until the impeller speed is fully engaged. Then the speed decreases by 100 rpm every 90 seconds until the impeller speed reaches the lowest controllable speed. Record the impeller speed, input the speed, impeller target speed and PWM value.

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