PCU pressure control module and control method thereof

Abstract

The invention provides a PCU pressure control module and a control method thereof, and relates to the technical field of pressure control, the PCU pressure control module comprises a power supply module and a hydraulic module, the hydraulic module is provided with a first oil inlet and a second oil inlet, a first main path is provided with a pressure increasing valve I, a second main path is provided with a pressure increasing valve II, and the oil outlet end of the first main path is provided with a first oil outlet; a balance oil way is arranged between the inlet end of the first main way and the inlet end of the second main way, a balance valve is arranged on the balance oil way, a pressure sensor is arranged at the tail end of the balance oil way, a first branch is arranged on the first main way in a communicating mode, a second branch is arranged on the second main way in a communicating mode, and a first pressure reducing valve is arranged on the first branch. The second branch is provided with a second pressure reducing valve, the oil outlet end of the first branch and the oil outlet end of the second branch communicate with the output oil way, the oil outlet end of the output oil way is provided with a second oil outlet, and the power supply module is used for supplying power to the hydraulic module. The defects that in the prior art, pressure adjustment is not accurate, and response lags behind are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure control, and in particular to a PCU pressure control module and its control method. Background Art

[0002] With the continuous development of automotive electrification and intelligence, the development demand for electro-mechanical-hydraulic servo braking systems is increasing. Among them, the PCU (Pressure Control Unit) hydraulic control module is the core component of the entire system.

[0003] In hydraulic or pneumatic systems, pressure control is an important guarantee for system stability and safety. Traditional pressure control methods usually rely on simple mechanical valves or relatively primitive electrical control methods, and often have problems such as inaccurate regulation and reaction lag. Summary of the Invention

[0004] The present invention provides a PCU pressure control module and its control method to solve the defects of inaccurate pressure regulation and reaction lag in the prior art.

[0005] On the one hand, the present invention provides a PCU pressure control module, including a power supply module and a hydraulic module. The hydraulic module is provided with a first oil inlet and a second oil inlet. The first oil inlet is arranged on the first main path, and the second oil inlet is arranged on the second main path. A first pressure increasing valve is arranged on the first main path, and a second pressure increasing valve is arranged on the second main path. The oil outlet end of the first main path is provided with a first oil outlet. The oil outlet end of the second main path is communicated with the first main path. A balance oil path is arranged between the inlet end of the first main path and the inlet end of the second main path. A balance valve is arranged on the balance oil path, and a pressure sensor is arranged at the end of the balance oil path. A first branch is communicated and arranged on the first main path, and a second branch is communicated and arranged on the second main path. A first pressure reducing valve is arranged on the first branch, and a second pressure reducing valve is arranged on the second branch. The oil outlet ends of the first branch and the second branch are both communicated with the output oil path. The oil outlet end of the output oil path is provided with a second oil outlet. The power supply module is used to supply power to the hydraulic module.

[0006] Preferably, the power supply module includes a housing, an upper cover, five groups of power supply components, a circuit board, and an electrical connector socket. The upper cover is adhesively bonded to the upper end of the housing. The circuit board is installed inside the housing. The five groups of power supply components are all installed on the lower bottom surface of the housing. The power supply components are electrically connected to the circuit board. The electrical connector socket is installed inside the housing.

[0007] Preferably, a coil support seat is further arranged between the power supply component and the lower bottom surface of the housing. The coil support seat includes: a support body, on which an installation hole is arranged for installing the power supply component. Two groups of elastic parts are symmetrically arranged on the front and rear sides of the support body, and bumps are fixedly connected to the elastic parts.

[0008] On the other hand, the present invention also provides a control method for a PCU pressure control module, including: Step S1: Obtain the real-time output pressures of the first oil outlet and the second oil outlet; Step S2: Correct the pressure output values of the first oil outlet and the second oil outlet based on the target pressures of the first oil outlet and the second oil outlet; Step S3: Judge the running safety of the pressure control module according to the pressure correction situation.

[0009] Preferably, step S2 includes: Step S21: Compare the real-time output pressures of the first oil outlet and the second oil outlet with the target pressures of the first oil outlet and the second oil outlet to determine the first pressure output deviation values of the first oil outlet and the second oil outlet; ; where is the first pressure output deviation value of the i-th oil outlet; is the target pressure of the i-th oil outlet; is the real-time output pressure of the i-th oil outlet; is the absolute value symbol; Step S22: Initially correct the pressure output values of the first oil outlet and the second oil outlet respectively to obtain the pressure correction coefficients; Step S23: Complete the correction of the pressure output values of the first oil outlet and the second oil outlet based on the pressure correction coefficients.

[0010] Preferably, step S22 includes: Step S221: Adjust the pressure output values of the first oil outlet and the second oil outlet respectively with the corresponding first correction amount as the pressure adjustment value. The first correction amount is less than the first pressure output deviation value of the corresponding oil outlet, and obtain the adjusted pressure output values of the first oil outlet and the second oil outlet; Step S222: Calculate the pressure correction coefficients of the first oil outlet and the second oil outlet respectively; ; where is the pressure correction coefficient of the i-th oil outlet; is the adjusted actual pressure output value of the i-th oil outlet; is the actual pressure output value of the i-th oil outlet before adjustment; is the first correction amount of the i-th oil outlet.

[0011] Preferably, step S23 includes: Step S231: Calculate the first pressure output deviation values of the first oil outlet and the second oil outlet; ; where is the second pressure output deviation value of the i-th oil outlet; is the target pressure of the i-th oil outlet; is the adjusted actual pressure output value of the i-th oil outlet; Step S232: Calculate the second correction amounts of the first oil outlet and the second oil outlet; ; where is the second correction amount of the i-th oil outlet; is the pressure correction coefficient of the i-th oil outlet; Step S233: Correct the pressure output values of the first oil outlet and the second oil outlet based on the second correction amounts of the first oil outlet and the second oil outlet.

[0012] Preferably, Step S3 includes: Step S31: Obtain the pressure fluctuation data during the pressure regulation process; Step S32: Calculate the safety factor of the pressure control module; ; where is the static safety factor of the pressure control module; is the average pressure fluctuation value of the i-th oil outlet in the steady state; is the target pressure of the i-th oil outlet; is the maximum pressure deviation value of the i-th oil outlet during the current pressure regulation process; is the theoretical pressure regulation value of the i-th oil outlet during the current pressure regulation process; is the standard deviation of the pressure fluctuation of the i-th oil outlet in the steady state; is the standard deviation of the noise of the pressure sensor; is the pressure correction coefficient of the i-th oil outlet; is the time length for the i-th oil outlet to reach the steady state; is the unit time length; is the unit pressure value; Step S33: When the safety factor of the pressure control module is less than a preset first threshold, perform a safety alarm to remind the staff to repair the pressure control module.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This technical solution adopts a dual main circuit design, and through the configuration of the booster valve and the pressure reducing valve, it can accurately adjust the pressure of each main circuit and its branches, so as to meet the pressure requirements under different loads and working conditions. By forming a closed-loop control with the pressure sensor and the solenoid valve, the accuracy of pressure control is improved. Description of the Drawings

[0014] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the attached drawings required for the description of the embodiments or the prior art. Obviously, the attached drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these attached drawings.

[0015] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic working principle diagram of the hydraulic module of the present invention; Figure 3 is an exploded schematic structural diagram of the present invention; Figure 4 is a schematic structural diagram of the coil support seat of the present invention.

[0016] Reference numerals: 1, power supply module; 2, hydraulic module; 3, first oil inlet; 4, second oil inlet; 5, first main path; 6, second main path; 7, first pressure increasing valve; 8, second pressure increasing valve; 9, first oil outlet; 10, balance oil circuit; 11, balance valve; 12, pressure sensor; 13, first branch; 14, second branch; 15, first pressure reducing valve; 16, second pressure reducing valve; 17, second oil outlet; 18, housing; 19, upper cover; 20, power supply assembly; 21, circuit board; 22, electrical connector socket; 23, support body; 24, mounting hole; 25, elastic part; 26, convex block; 27, coil support seat. Detailed implementation manners

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the attached drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0018] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0019] Embodiment 1 An embodiment of the present invention provides a PCU pressure control module, including a power supply module 1 and a hydraulic module 2. A first oil inlet 3 and a second oil inlet 4 are provided on the hydraulic module 2. The first oil inlet 3 is provided on a first main path 5, and the second oil inlet 4 is provided on a second main path 6. A first pressure increasing valve 7 is provided on the first main path 5, and a second pressure increasing valve 8 is provided on the second main path 6. A first oil outlet 9 is provided at the oil outlet end of the first main path 5. The oil outlet end of the second main path 6 is communicated with the first main path 5. A balance oil path 10 is provided between the inlet end of the first main path 5 and the inlet end of the second main path 6. A balance valve 11 is provided on the balance oil path 10, and a pressure sensor 12 is provided at the end of the balance oil path 10. A first branch 13 is communicatively provided on the first main path 5, and a second branch 14 is communicatively provided on the second main path 6. A first pressure reducing valve 15 is provided on the first branch 13, and a second pressure reducing valve 16 is provided on the second branch 14. The oil outlet ends of the first branch 13 and the second branch 14 are both communicated with an output oil path. A second oil outlet 17 is provided at the oil outlet end of the output oil path. The power supply module 1 is used to supply power to the hydraulic module 2.

[0020] Preferably, the power supply module 1 includes a housing 18, an upper cover 19, five groups of power supply components 20, a circuit board 21, and an electrical connector socket 22. The upper cover 19 is adhesively bonded to the upper end of the housing 18. The circuit board 21 is installed inside the housing 18. The five groups of power supply components 20 are all installed on the lower bottom surface of the housing 18. The power supply components 20 are electrically connected to the circuit board 21. The electrical connector socket 22 is installed inside the housing 18.

[0021] Preferably, a coil support base 27 is further provided between the power supply component 20 and the lower bottom surface of the housing 18. The coil support base 27 includes: a support main body 23. An installation hole 24 is provided on the support main body 23 for installing the power supply component 20. Two groups of elastic parts 25 are symmetrically provided on the front and rear sides of the support main body 23. A convex block 26 is fixedly connected to the elastic part 25.

[0022] The beneficial effects of the above technical solutions are: This technical solution adopts a dual main - circuit design, and through the configuration of a pressure - increasing valve and a pressure - reducing valve, it can precisely adjust the pressure of each main circuit and its branches, thereby meeting the pressure requirements under different loads and working conditions. By forming a closed - loop control with the pressure sensor 12 and the solenoid valve, the accuracy of pressure control is improved.

[0023] The power - supply module 1 is designed with a combination of a housing 18 and an upper cover 19, which can effectively protect the internal circuit board 21 and the power - supply components 20 from the influence of the external environment, improving the safety and durability of the entire system.

[0024] A coil support base 27 is arranged between the power - supply component 20 and the lower bottom surface of the housing 18, which can effectively support the power - supply component 20 and ensure its good thermal - management performance. When the hydraulic module 2 is not installed, the coil will protrude above the housing 18 under the action of the bump 26. When the hydraulic module 2 is installed, the coil will be squeezed by the plane of the hydraulic module 2 until the plane of the housing 18 is completely fitted with the hydraulic module 2. At this time, the coil and the solenoid - valve magnet can be in the position with the maximum electromagnetic force. At this time, the elastic part 25 is compressed and deformed. When the hydraulic module 2 is disassembled, the elastic part 25 will return to its original state, facilitating repeated use.

[0025] Embodiment 2 The embodiment of the present invention also provides a control method for a PCU pressure - control module, which is used to control a PCU pressure - control module as described in Embodiment 1, including: Step S1: Obtain the real - time output pressures of the first oil outlet 9 and the second oil outlet 17; Step S2: Correct the pressure output values of the first oil outlet 9 and the second oil outlet 17 based on the target pressures of the first oil outlet 9 and the second oil outlet 17; Step S3: Judge the operation safety of the pressure - control module according to the pressure - correction situation.

[0026] Preferably, step S2 includes: Step S21: Compare the real - time output pressures of the first oil outlet 9 and the second oil outlet 17 with the target pressures of the first oil outlet 9 and the second oil outlet 17 to determine the first pressure - output deviation values of the first oil outlet 9 and the second oil outlet 17; ; where, is the first pressure - output deviation value of the i - th oil outlet; is the target pressure of the i - th oil outlet; is the real - time output pressure of the i - th oil outlet; is the absolute - value symbol; Step S22: Respectively perform preliminary corrections on the pressure output values of the first oil outlet 9 and the second oil outlet 17 to obtain the pressure - correction coefficients; Step S23: Based on the pressure correction coefficient, correct the pressure output values of the first oil outlet 9 and the second oil outlet 17.

[0027] Preferably, step S22 includes: Step S221: Adjust the pressure output values of the first oil outlet 9 and the second oil outlet 17 respectively with the corresponding first correction amount as the pressure adjustment value. The first correction amount is less than the first pressure output deviation value of the corresponding oil outlet, and obtain the adjusted pressure output values of the first oil outlet 9 and the second oil outlet 17; Step S222: Calculate the pressure correction coefficients of the first oil outlet 9 and the second oil outlet 17 respectively; ; where is the pressure correction coefficient of the i-th oil outlet; is the adjusted actual pressure output value of the i-th oil outlet; is the actual pressure output value of the i-th oil outlet before adjustment; is the first correction amount of the i-th oil outlet.

[0028] Preferably, step S23 includes: Step S231: Calculate the first pressure output deviation values of the first oil outlet 9 and the second oil outlet 17; ; where is the second pressure output deviation value of the i-th oil outlet; is the target pressure of the i-th oil outlet; is the adjusted actual pressure output value of the i-th oil outlet; Step S232: Calculate the second correction amounts of the first oil outlet 9 and the second oil outlet 17; ; where is the second correction amount of the i-th oil outlet; is the pressure correction coefficient of the i-th oil outlet; Step S233: Based on the second correction amounts of the first oil outlet 9 and the second oil outlet 17, correct the pressure output values of the first oil outlet 9 and the second oil outlet 17.

[0029] The beneficial effects of the above technical solutions are: By obtaining the real-time output pressures of the first oil outlet 9 and the second oil outlet 17 and comparing them with the target pressure, the pressure output deviation values can be accurately determined. This precise pressure monitoring mechanism ensures that the pressure control module can make precise adjustments according to actual needs, improving the control accuracy and stability of the system.

[0030] By making preliminary corrections and calculating the actual pressure change amount generated based on the preliminary corrections, the pressure correction coefficients of the first oil outlet 9 and the second oil outlet 17 are obtained, thereby realizing the calculation of the corresponding relationship between the set value adjustment value and the actual pressure change value, improving the accuracy of the final correction of the pressure output value, reducing the number of pressure adjustments, avoiding repeated adjustments, and preventing the situation of lag in pressure adjustment response. This optimized pressure adjustment process can reduce fluctuations and overshoots during the adjustment process, and improve the response speed and stability of the system.

[0031] Embodiment 3 Based on Embodiment 2, step S3 includes: Step S31: Obtain the pressure fluctuation data during the pressure adjustment process; Step S32: Calculate the safety factor of the pressure control module; ; where is the static safety factor of the pressure control module; is the average pressure fluctuation value of the i-th oil outlet in the steady state; is the target pressure of the i-th oil outlet; is the maximum pressure deviation value of the i-th oil outlet during the current pressure adjustment process; is the theoretical pressure adjustment value of the i-th oil outlet during the current pressure adjustment process; is the standard deviation of the pressure fluctuation of the i-th oil outlet in the steady state; is the standard deviation of the noise of the pressure sensor 12; is the pressure correction coefficient of the i-th oil outlet; is the time length for the i-th oil outlet to reach the steady state; is the unit time length; is the unit pressure value; Step S33: When the safety factor of the pressure control module is less than the preset first threshold, perform a safety alarm to remind the staff to repair the pressure control module.

[0032] In this embodiment, the steady state of the oil outlet refers to the state where the actual pressure output value reaches a stable state after the pressure set value is adjusted.

[0033] In this embodiment, the theoretical pressure adjustment value during the pressure adjustment process is the difference between the original pressure set value and the target pressure.

[0034] The beneficial effects of the above technical solutions are: By comprehensively considering multiple key factors, such as the average pressure fluctuation value at the oil outlet, the target pressure, the maximum pressure deviation value, the theoretical pressure adjustment value, the standard deviation of pressure fluctuation, the noise standard deviation of pressure sensor 12, the pressure correction coefficient, the time length to reach the steady state, etc. Through this comprehensive calculation of multiple factors, the safety performance of the pressure control module can be evaluated more scientifically and accurately, making the evaluation results more reliable and persuasive.

[0035] A preset first threshold is set. When the safety factor of the pressure control module is less than this threshold, the system will automatically give a safety alarm. This mechanism can timely remind the staff of potential safety hazards in the pressure control module, prompting the staff to repair it as soon as possible, thus effectively avoiding safety accidents caused by the failure of the pressure control module, ensuring the safe and stable operation of the system, and reducing safety risks and potential losses.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A PCU pressure control module, characterized in that, It includes a power supply module (1) and a hydraulic module (2). The hydraulic module (2) is provided with a first oil inlet (3) and a second oil inlet (4). The first oil inlet (3) is arranged on the first main path (5), and the second oil inlet (4) is arranged on the second main path (6). A first booster valve (7) is arranged on the first main path (5), and a second booster valve (8) is arranged on the second main path (6). The oil outlet end of the first main path (5) is provided with a first oil outlet (9). The oil outlet end of the second main path (6) is communicated with the first main path (5). A balance oil path (10) is arranged between the inlet end of the first main path (5) and the inlet end of the second main path (6). A balance valve (11) is arranged on the balance oil path (10), and a pressure sensor (12) is arranged at the end of the balance oil path (10). A first branch (13) is communicatively arranged on the first main path (5), and a second branch (14) is communicatively arranged on the second main path (6). A first pressure reducing valve (15) is arranged on the first branch (13), and a second pressure reducing valve (16) is arranged on the second branch (14). The oil outlet ends of the first branch (13) and the second branch (14) are both communicated with the output oil path. The oil outlet end of the output oil path is provided with a second oil outlet (17). The power supply module (1) is used to supply power to the hydraulic module (2).

2. The PCU pressure control module according to claim 1, characterized in that, The power supply module (1) includes a housing (18), an upper cover (19), five groups of power supply components (20), a circuit board (21) and an electrical connector socket (22). The upper cover (19) is adhesively bonded to the upper end of the housing (18). The circuit board (21) is installed inside the housing (18). The five groups of power supply components (20) are all installed on the lower bottom surface of the housing (18). The power supply components (20) are electrically connected to the circuit board (21). The electrical connector socket (22) is installed inside the housing (18).

3. The PCU pressure control module according to claim 1, characterized in that, A coil support seat (27) is further arranged between the power supply component (20) and the lower bottom surface of the housing (18). The coil support seat (27) includes: a support body (23). An installation hole (24) is arranged on the support body (23) for installing the power supply component (20). Two groups of elastic parts (25) are symmetrically arranged on the front and back sides of the support body (23). A convex block (26) is fixedly connected to the elastic part (25).

4. A control method for a PCU pressure control module, which is used to control a PCU pressure control module as described in any one of claims 1-3, characterized in that, It includes: Step S1: Obtain the real-time output pressures of the first oil outlet (9) and the second oil outlet (17). Step S2: Correct the pressure output values of the first oil outlet (9) and the second oil outlet (17) based on the target pressures of the first oil outlet (9) and the second oil outlet (17). Step S3: Judge the operation safety of the pressure control module according to the pressure correction situation.

5. The control method of a PCU pressure control module according to claim 4, characterized in that, Step S2 includes: Step S21: Compare the real-time output pressures of the first oil outlet (9) and the second oil outlet (17) with the target pressures of the first oil outlet (9) and the second oil outlet (17) to determine the first pressure output deviation values of the first oil outlet (9) and the second oil outlet (17). ; wherein, is the first pressure output deviation value of the i-th oil outlet; is the target pressure of the i-th oil outlet; is the real-time output pressure of the i-th oil outlet; is the absolute value symbol; Step S22: Preliminarily correct the pressure output values of the first oil outlet (9) and the second oil outlet (17) respectively to obtain the pressure correction coefficients. Step S23: Based on the pressure correction coefficient, complete the correction of the pressure output values of the first oil outlet (9) and the second oil outlet (17).

6. The control method of a PCU pressure control module according to claim 5, characterized in that, Step S22 includes: Step S221: Respectively adjust the pressure output values of the first oil outlet (9) and the second oil outlet (17) with the corresponding first correction amount as the pressure adjustment value. The first correction amount is less than the first pressure output deviation value of the corresponding oil outlet, and obtain the adjusted pressure output values of the first oil outlet (9) and the second oil outlet (17); Step S222: Calculate the pressure correction coefficients of the first oil outlet (9) and the second oil outlet (17) respectively; ; wherein, is the pressure correction coefficient of the i-th oil outlet; is the adjusted actual pressure output value of the i-th oil outlet; is the actual pressure output value of the i-th oil outlet before adjustment; is the first correction amount of the i-th oil outlet.

7. The control method of a PCU pressure control module according to claim 5, characterized in that, Step S23 includes: Step S231: Calculate the first pressure output deviation values of the first oil outlet (9) and the second oil outlet (17); ; wherein, is the second pressure output deviation value of the i-th oil outlet; is the target pressure of the i-th oil outlet; is the adjusted actual pressure output value of the i-th oil outlet; Step S232: Calculate the second correction amounts of the first oil outlet (9) and the second oil outlet (17); ; wherein, is the second correction amount of the i-th oil outlet; is the pressure correction coefficient of the i-th oil outlet; Step S233: Based on the second correction amounts of the first oil outlet (9) and the second oil outlet (17), correct the pressure output values of the first oil outlet (9) and the second oil outlet (17).

8. The control method of a PCU pressure control module according to claim 6, characterized in that, Step S3 includes: Step S31: Obtain the pressure fluctuation data during the pressure adjustment process; Step S32: Calculate the safety factor of the pressure control module; ; wherein, is the static safety factor of the pressure control module; is the average pressure fluctuation value of the i-th oil outlet under the steady state; is the target pressure of the i-th oil outlet; is the maximum pressure deviation value of the i-th oil outlet during the current pressure regulation process; is the theoretical pressure regulation value of the i-th oil outlet during the current pressure regulation process; is the standard deviation of the pressure fluctuation of the i-th oil outlet under the steady state; is the standard deviation of the noise of the pressure sensor (12); is the pressure correction coefficient of the i-th oil outlet; is the time length for the i-th oil outlet to reach the steady state; is the unit time length; is the unit pressure value; Step S33: When the safety factor of the pressure control module is less than the preset first threshold, perform a safety alarm to remind the staff to repair the pressure control module.

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