Compact low-cost multi-point pressure difference acquisition system of engine intercooling high-pressure filter integrated system

Abstract

The invention discloses a compact low-cost multi-point pressure difference acquisition system of an engine intercooling high-pressure filter integrated system. The compact low-cost multi-point pressure difference acquisition system comprises five pressure acquisition heads, a single differential pressure gauge Px, a plurality of pressure measuring pipelines and 8 / 12 electromagnetic switches, the pressure collecting head is installed in a power cabin and obtains static pressure of the front end, the rear end, left and right outlets of a high-pressure secondary filter element and the front end of an intercooler. The differential pressure gauge and the electromagnetic switch are intensively arranged outside the cabin and are connected through an air pipe; the system provides two working conditions: 1, single-side high pressure resistance of the differential pressure gauge: eight electromagnetic switches are switched in a time-sharing manner, and filter element differential pressure, inlet-front end differential pressure and inlet-left and right outlet differential pressure are measured in sequence; 2, the two sides of the differential pressure gauge are only resistant to differential pressure, namely 12 electromagnetic switches, the pressure at the two ends of the differential pressure gauge is balanced firstly and then measured, and high-pressure impact is avoided; multi-point collection is achieved through the single differential pressure gauge, high-pressure-intolerant elements are compatible, the cost is remarkably reduced, the arrangement space is saved, and the device is suitable for real vehicle and rack testing.

Description

Technical Field

[0001] This invention belongs to the field of engine intake air filtration technology, specifically relating to a compact, low-cost, multi-point differential pressure acquisition system for an integrated intercooler high-pressure filter system for engines. Background Technology

[0002] The intercooler-high-pressure two-stage filter integrated system is a unique intake system for high-power-density diesel engines. To achieve ultra-high power density, the secondary filter is placed at the rear end of the compressor and intercooler. Due to the reduced volumetric airflow after compression, the secondary filter volume can be significantly reduced, thus achieving high power density in the powertrain. Building upon this, the intercooler-high-pressure two-stage filter integrated system integrates the intercooler and high-pressure secondary filter into a single unit, eliminating the connecting flange between the two. This further improves the system's integration and power density, but also increases the complexity of its aerodynamic characteristics and reduces its reliability.

[0003] To address the increased complexity of the aerodynamic characteristics of the aforementioned system and to maximize its reliability, comprehensive monitoring of the aerodynamic characteristics of the intercooler high-pressure secondary filter integrated system is required in both real-vehicle and experimental settings. This necessitates collecting pressure differentials from multiple components of the system for analysis and decision-making, such as the pressure differential of the high-pressure secondary filter element, the pressure differential between the intercooler inlet and the front end of the high-pressure secondary filter element, the pressure differential between the intercooler inlet and the left outlet of the high-pressure secondary filter, and the pressure differential between the intercooler inlet and the right outlet of the high-pressure secondary filter. However, in real-vehicle data acquisition, multi-point pressure differential acquisition systems face numerous challenges, including the requirement for high-pressure-resistant differential gauges, the large number of gauges needed, high costs, and compact system layout. These issues negatively impact the high power density and fuel economy of diesel engines. Therefore, it is necessary to propose a compact, low-cost, and low-pressure differential acquisition system suitable for engine intercooler high-pressure secondary filter integrated systems that is compatible with differential gauges that are not resistant to high pressure. Summary of the Invention

[0004] In view of this, the present invention provides a compact and low-cost multi-point differential pressure acquisition system for an integrated intercooled high-pressure filter system in an engine. It can achieve the function of acquiring multiple sets of differential pressure data using only a single differential pressure gauge, and can complete the acquisition using a single-sided differential pressure gauge that is not resistant to high pressure. This solves many problems faced by multi-point differential pressure acquisition systems in actual vehicle acquisition, such as the requirement for high pressure resistance of differential pressure gauges, the large number required, high cost, and compact space for acquisition system layout. It effectively supports the high power density and economic indicators of diesel engines.

[0005] The technical solution for implementing the present invention is as follows:

[0006] The engine intercooler high-pressure filter integrated system is a compact, low-cost, multi-point differential pressure acquisition system, including:

[0007] Five pressure acquisition heads (A, B, C, D, E);

[0008] Several pressure testing lines and air pipe connectors;

[0009] A differential pressure gauge Px;

[0010] And electromagnetic switch assembly;

[0011] in:

[0012] Pressure sensor A is located at the rear end of the high-pressure secondary filter element to collect pressure P. A ;

[0013] Pressure sensor B is located at the front end of the high-pressure secondary filter element to collect pressure P. B ;

[0014] Pressure sensor C is located at the left outlet of the high-pressure secondary filter, and it collects pressure P. C ;

[0015] Pressure sensor D is located at the right outlet of the high-pressure secondary filter, and it collects pressure P. D ;

[0016] Pressure sensor E is located at the front end of the intercooler to collect pressure P. E ;

[0017] The differential pressure gauge and electromagnetic switch are both located outside the engine room and are connected to the pressure acquisition heads located inside the engine room via pressure measurement pipelines and air pipe connectors.

[0018] The electromagnetic switch group is configured as follows:

[0019] In the first operating condition, it consists of 8 electromagnetic switches; or in the second operating condition, it consists of 12 electromagnetic switches.

[0020] The electromagnetic switch assembly uses a selective switching method to cause the differential pressure gauge to measure sequentially:

[0021] High-pressure secondary filter element pressure difference P1 = P B -P A ;

[0022] The pressure difference between the intercooler inlet and the front end of the high-pressure secondary filter element, P2 = P E -P B ;

[0023] The pressure difference between the intercooler inlet and the left outlet of the high-pressure secondary filter, P3 = P E -P C ;

[0024] The pressure difference between the intercooler inlet and the right outlet of the high-pressure secondary filter, P4 = P E -P D .

[0025] Furthermore, the first operating condition is that the differential pressure gauge can withstand the system high pressure on one side. Under the first operating condition:

[0026] The 8-channel electromagnetic switch includes:

[0027] S1-, S2-, S3-, S4-, one end of each is connected to pressure acquisition heads A, B, C, and D respectively, and the other end is connected to the low-pressure end of differential pressure gauge Px;

[0028] S1+, S2+, S3+, and S4+ are each connected at one end to pressure acquisition heads B, E, E, and E respectively, and at the other end to the high-pressure end of differential pressure gauge Px.

[0029] The electromagnetic switches are controlled sequentially to allow the differential pressure gauge Px to obtain the differential pressures P1, P2, P3, and P4 in a time-division manner.

[0030] Furthermore, the data acquisition method under the first operating condition includes:

[0031] Step 1: Turn off all electromagnetic switches, power on differential pressure gauge Px and zero it, start the intercooler high-pressure two-stage filter integrated system to the predetermined operating condition;

[0032] Step 2: Turn on S1+ and S1- in sequence, read the differential pressure gauge Px value as P1, and then turn off S1+ and S1-.

[0033] Step 3: Turn on S2+ and S2- in sequence, read the differential pressure gauge Px value as P2, and then turn off S2+ and S2-.

[0034] Step 4: Turn on S3+ and S3- in sequence, read the differential pressure gauge Px value as P3, and then turn off S3+ and S3-.

[0035] Step 5: Turn on S4+ and S4- in sequence, read the differential pressure gauge Px value as P4, and then turn off S4+ and S4-.

[0036] Furthermore, in the second operating condition, the differential pressure gauge can only withstand the system differential pressure on both sides and cannot withstand the system high pressure on one side. Under the second operating condition:

[0037] The 12-channel electromagnetic switch includes:

[0038] S1-, S2-, S3-, S4-, one end of each is connected to pressure acquisition heads A, B, C, and D respectively, and the other end is connected to the low-pressure end of differential pressure gauge Px;

[0039] S1+, S2+, S3+, and S4+ are each connected at one end to pressure acquisition heads B, E, E, and E respectively, and at the other end to the high-pressure end of differential pressure gauge Px.

[0040] S10, S20, S30, and S40 are each connected across the low-pressure end and the high-pressure end of the differential pressure gauge Px.

[0041] The electromagnetic switches are controlled sequentially so that the differential pressure gauge Px achieves pressure balance at both ends through corresponding S10 / S20 / S30 / S40 before each measurement, and then the differential pressures P1, P2, P3, and P4 are obtained in time-division manner.

[0042] Furthermore, the data acquisition method under the second operating condition includes:

[0043] Step 1: Turn off all electromagnetic switches, power on differential pressure gauge Px and zero it, start the intercooler high-pressure two-stage filter integrated system to the predetermined operating condition;

[0044] Step 2: Turn on S10, then turn on S1+ and S1- in sequence, turn off S10, and read the differential pressure gauge Px reading as P1; turn on S10 again and then turn off S1+ and S1-.

[0045] Step 3: Turn on S20, then turn on S2+ and S2- in sequence, turn off S20, and read the differential pressure gauge Px reading as P2; turn on S20 again and then turn off S2+ and S2-.

[0046] Step 4: Turn on S30, then turn on S3+ and S3- in sequence, turn off S30, and read the differential pressure gauge Px reading as P3; turn on S30 again and then turn off S3+ and S3-.

[0047] Step 5: Turn on S40, then turn on S4+ and S4- in sequence, turn off S40, and read the differential pressure gauge Px reading as P4; turn on S40 again and then turn off S4+ and S4-.

[0048] Furthermore, the electromagnetic switch can be replaced by a manual valve switch, a pneumatic valve switch, or other switching elements that can open or close a fluid passage.

[0049] Furthermore, the intercooler high-pressure secondary filter integrated system is a test object under actual vehicle conditions or test bench conditions.

[0050] Beneficial effects:

[0051] 1. This invention replaces the traditional design that requires an independent differential pressure gauge for each measuring point by using a single differential pressure gauge in conjunction with an electromagnetic switch for time-division multiplexing, thus significantly reducing the number of differential pressure gauges (only 1 is needed) and thereby significantly reducing hardware procurement costs.

[0052] 2. This invention uses only one differential pressure gauge, avoiding the need to install multiple differential pressure gauges in the compact engine compartment, effectively alleviating the space constraint problem and supporting the high power density design of diesel engines.

[0053] 3. This invention proposes two compatible solutions for high-voltage environments in actual vehicles:

[0054] Case 1 (High-pressure differential pressure gauge): The measuring points are switched directly via an 8-channel electromagnetic switch;

[0055] Case 2 (Differential pressure gauge not resistant to high pressure): Add 12 electromagnetic switches (including P10-P40 balance switches) to avoid damage to the differential pressure gauge caused by transient high pressure on one side, and expand the applicability of low pressure differential pressure gauge in high pressure system.

[0056] 4. The electromagnetic switch of the present invention can be replaced with any type of switch such as manual / pneumatic valve, and is compatible with both real vehicle and bench test conditions, adapting to different scenario requirements and enhancing the versatility and maintainability of the system. Attached Figure Description

[0057] Figure 1 This is a schematic diagram of a multi-point differential pressure acquisition system to enable differential pressure gauges to withstand high pressure.

[0058] Figure 2 This is a schematic diagram of a multi-point differential pressure acquisition system when the differential pressure gauge cannot withstand high pressure. Detailed Implementation

[0059] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0060] This invention provides a compact, low-cost, multi-point differential pressure acquisition system for an engine intercooler high-pressure filter integrated system. The differential pressure acquisition system comprises pressure acquisition heads A, B, C, D, and E, several pressure measuring lines, several air pipe connectors, one differential pressure gauge, and 8 or 12 electromagnetic switches. The pressure acquisition heads A, B, C, D, and E are installed on the intercooler high-pressure secondary filter integrated system, located in the engine compartment, and collect the static pressure inside the intercooler high-pressure secondary filter integrated system. The electromagnetic switches and differential pressure gauge are located outside the engine compartment and connected to the pressure acquisition heads inside the engine compartment via air pipe connectors and pressure measuring air pipes. Pressure acquisition head A is located at the rear end of the high-pressure secondary filter element, and the pressure is denoted as P. A Pressure sensor B is located at the front end of the high-pressure secondary filter element, and the pressure is denoted as P. B Pressure sensor C is located at the left outlet of the high-pressure secondary filter, and the pressure is denoted as P. C Pressure sensor D is located at the right outlet of the high-pressure secondary filter, and the pressure is denoted as P. D The pressure sensor E is located at the front end of the intercooler, and the pressure is denoted as P. E The pressure difference P1 of the high-pressure secondary filter element is P. B -P A The pressure difference P2 between the intercooler inlet and the front end of the high-pressure secondary filter element is P. E -P B The pressure difference P3 between the intercooler inlet and the left outlet of the high-pressure secondary filter is P.E -P C The pressure difference P4 between the intercooler inlet and the right outlet of the high-pressure secondary filter is P. E -P D .

[0061] The electromagnetic switch can be replaced by any type of switch, such as a manual valve switch or a pneumatic valve switch. The intercooler high-pressure secondary filter integrated system can be tested under actual vehicle conditions or under test bench conditions.

[0062] The multi-point differential pressure acquisition system has two arrangement methods, each applicable to two different situations: Situation (1): The differential pressure gauge used can withstand the high pressure of the intercooler high-pressure secondary filter integrated system on one side; Situation (2): The differential pressure gauge used cannot withstand the high pressure of the intercooler high-pressure secondary filter integrated system on one side, and can only withstand the system differential pressure on both sides. Figure 1 As shown, case (1) includes 8 electromagnetic switches, such as Figure 2 As shown, case (2) includes 12 electromagnetic switches. In both cases, the electromagnetic switches are connected to the pressure acquisition head side on one side and the differential pressure gauge side on the other side.

[0063] The specific layout of case (1) is as follows: Electromagnetic switch S1 is connected to pressure acquisition head A via an air tube and an air tube connector on one side, and to the low-pressure end of differential pressure gauge Px on the other side; Electromagnetic switch S2 is connected to pressure acquisition head B via an air tube and an air tube connector on one side, and to the low-pressure end of differential pressure gauge Px on the other side; Electromagnetic switch S3 is connected to pressure acquisition head C via an air tube and an air tube connector on one side, and to the low-pressure end of differential pressure gauge Px on the other side; Electromagnetic switch S4 is connected to pressure acquisition head D via an air tube and an air tube connector on one side, and to the low-pressure end of differential pressure gauge Px on the other side. The low-pressure end of the electromagnetic switch S1+ is connected to the pressure acquisition head B via an air tube and an air tube connector, and the other side is connected to the high-pressure end of the differential pressure gauge Px; the high-pressure end of the electromagnetic switch S2+ is connected to the pressure acquisition head E via an air tube and an air tube connector, and the other side is connected to the high-pressure end of the differential pressure gauge Px; the high-pressure end of the electromagnetic switch S3+ is connected to the pressure acquisition head E via an air tube and an air tube connector, and the other side is connected to the high-pressure end of the differential pressure gauge Px; the high-pressure end of the electromagnetic switch S4+ is connected to the pressure acquisition head E via an air tube and an air tube connector, and the other side is connected to the high-pressure end of the differential pressure gauge Px.

[0064] The specific data collection method for situation (1) is as follows:

[0065] Step 1: In the initial state, all electromagnetic switches are in the off state. Then, power on the differential pressure gauge, zero the differential pressure gauge Px, and then turn on the intercooler high-pressure secondary filter integrated system to achieve the predetermined pressure ratio and mass flow rate.

[0066] Step 2: Turn on the electromagnetic switches S1+ and S1- in sequence. At this time, the reading of the differential pressure gauge Px is the differential pressure P1 of the high-pressure secondary filter element. Then turn off the electromagnetic switches S1+ and S1- in sequence.

[0067] Step 3: Turn on the electromagnetic switches S2+ and S2- in sequence. At this time, the reading of the differential pressure gauge Px is the pressure difference P2 between the inlet of the intercooler and the front end of the high-pressure secondary filter element. Then turn off the electromagnetic switches S2+ and S2- in sequence.

[0068] Step 4: Turn on the electromagnetic switches S3+ and S3- in sequence. At this time, the reading of the differential pressure gauge Px is the pressure difference P3 between the inlet of the intercooler and the left outlet of the high-pressure secondary filter. Then turn off the electromagnetic switches S3+ and S3- in sequence.

[0069] Step 5: Turn on the electromagnetic switches S4+ and S4- in sequence. At this time, the reading of the differential pressure gauge Px is the pressure difference P4 between the inlet of the intercooler and the right outlet of the high-pressure secondary filter. Then turn off the electromagnetic switches S4+ and S4- in sequence.

[0070] The specific layout of scenario (2) is as follows: one side of electromagnetic switch S1- is connected to pressure acquisition head A via an air tube and an air tube connector, and the other side is connected to the low-pressure end of differential pressure gauge Px; one side of electromagnetic switch S2- is connected to pressure acquisition head B via an air tube and an air tube connector, and the other side is connected to the low-pressure end of differential pressure gauge Px; one side of electromagnetic switch S3- is connected to pressure acquisition head C via an air tube and an air tube connector, and the other side is connected to the low-pressure end of differential pressure gauge Px; one side of electromagnetic switch S4- is connected to pressure acquisition head D via an air tube and an air tube connector, and the other side is connected to the low-pressure end of differential pressure gauge Px; one side of electromagnetic switch S1+ is connected to pressure acquisition head B via an air tube and an air tube connector. One side of the electromagnetic switch S2+ is connected to the pressure acquisition head E via an air tube and an air tube connector, and the other side is connected to the high-pressure end of the differential pressure gauge Px. The other side of the electromagnetic switch S3+ is connected to the pressure acquisition head E via an air tube and an air tube connector, and the other side is connected to the high-pressure end of the differential pressure gauge Px. The other side of the electromagnetic switch S4+ is connected to the pressure acquisition head E via an air tube and an air tube connector, and the other side is connected to the high-pressure end of the differential pressure gauge Px. Electromagnetic switches S10, S20, S30, and S40 are all connected to the low-pressure end of the differential pressure gauge Px on one side and to the high-pressure end of the differential pressure gauge Px on the other side.

[0071] The specific data collection method for situation (2) is as follows:

[0072] Step 1: In the initial state, all electromagnetic switches are in the off state. Then, power on the differential pressure gauge, zero the differential pressure gauge Px, and then turn on the intercooler high-pressure two-stage filter integrated system to achieve the predetermined pressure ratio and mass flow rate.

[0073] Step 2: First, turn on electromagnetic switch S10, then turn on electromagnetic switches S1+ and S1- in sequence. After electromagnetic switch S1+ is turned on, the two sides of the differential pressure gauge Px are connected, and the reading of differential pressure gauge Px is 0. After electromagnetic switch S1- is turned on, pressure sampling head A and pressure sampling head B are connected. A small airflow will be formed between pressure sampling head A, electromagnetic switch S1+, electromagnetic switch S10, electromagnetic switch S1-, and pressure sampling head B. At this time, the reading of differential pressure gauge Px is the micro-pressure difference caused by this micro-airflow passing through electromagnetic switch S10. Then turn off electromagnetic switch S10. At this time, the reading of differential pressure gauge Px is the pressure difference P1 of the high-pressure secondary filter element. Then turn on electromagnetic switch S10 again, and then turn off electromagnetic switches S1+ and S1- in sequence.

[0074] Even if the drive signals of electromagnetic switches S1+ and S1- are synchronized, due to batch limitations and spring characteristics of the solenoid valve body, their actual opening process is not strictly synchronized, inevitably resulting in an opening time difference. Without electromagnetic switch S10, if electromagnetic switch S1+ is activated at the instant before electromagnetic switch S1- is activated, one side of the differential pressure gauge Px will be at atmospheric pressure while the other side directly experiences the high pressure from the pressure acquisition head of the intercooler's high-pressure secondary filter integrated system, leading to damage to the differential pressure gauge that is not resistant to high pressure on one side. Electromagnetic switch S10 can pre-balance the air pressure, preventing the differential pressure gauge from directly contacting the high pressure of the intercooler's high-pressure secondary filter integrated system.

[0075] Step 3: First, turn on solenoid switch S20, then turn on solenoid switches S2+ and S2- in sequence, and then turn off solenoid switch S20. At this time, the reading of differential pressure gauge Px is the pressure difference P2 between the intercooler inlet and the front end of the high-pressure secondary filter element. Then turn on solenoid switch S20 again, and then turn off solenoid switches S2+ and S2- in sequence.

[0076] Step 4: First, turn on solenoid switch S30, then turn on solenoid switches S3+ and S3- in sequence, and then turn off solenoid switch S30. At this time, the reading of differential pressure gauge Px is the pressure difference P3 between the inlet of the intercooler and the left outlet of the high-pressure secondary filter. Then turn on solenoid switch S30 again, and then turn off solenoid switches S3+ and S3- in sequence.

[0077] Step 5: First, turn on solenoid switch S40, then turn on solenoid switches S4+ and S4- in sequence, and then turn off solenoid switch S40. At this time, the differential pressure gauge reading Px is the pressure difference P4 between the intercooler inlet and the right outlet of the high-pressure secondary filter. Then turn on solenoid switch S40 again, and then turn off solenoid switches S4+ and S4- in sequence.

[0078] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A compact, low-cost, multi-point differential pressure acquisition system for an engine intercooled high-pressure filter integrated system, characterized in that: include: Five pressure acquisition heads (A, B, C, D, E); Several pressure testing lines and air pipe connectors; A differential pressure gauge Px; And electromagnetic switch assembly; in: A is located at the rear end of the high-pressure secondary filter element, collecting pressure P. A ; B is located at the front end of the high-pressure secondary filter element, collecting pressure P. B ; C is located at the left outlet of the high-pressure secondary filter, collecting pressure P. C ; D is located at the right outlet of the high-pressure secondary filter, collecting pressure P. D ; E is located at the front end of the intercooler, collecting pressure P. E ; The differential pressure gauge and electromagnetic switch are both located outside the engine room and are connected to the pressure acquisition heads located inside the engine room via pressure measurement pipelines and air pipe connectors. The electromagnetic switch group is configured as follows: In the first operating condition, it consists of 8 electromagnetic switches; or in the second operating condition, it consists of 12 electromagnetic switches. The electromagnetic switch assembly uses a selective switching method to cause the differential pressure gauge to measure sequentially: High-pressure secondary filter element pressure difference P1 = P B -P A ; The pressure difference between the intercooler inlet and the front end of the high-pressure secondary filter element, P2 = P E -P B ; The pressure difference between the intercooler inlet and the left outlet of the high-pressure secondary filter, P3 = P E -P C ; The pressure difference between the intercooler inlet and the right outlet of the high-pressure secondary filter, P4 = P E -P D .

2. The system according to claim 1, characterized in that, The first operating condition is that the differential pressure gauge can withstand the high pressure of the system on one side. Under the first operating condition: The 8-channel electromagnetic switch includes: S1-, S2-, S3-, S4-, one end of each is connected to pressure acquisition heads A, B, C, and D respectively, and the other end is connected to the low-pressure end of differential pressure gauge Px; S1+, S2+, S3+, and S4+ are each connected at one end to pressure acquisition heads B, E, E, and E respectively, and at the other end to the high-pressure end of differential pressure gauge Px. The electromagnetic switches are controlled sequentially to allow the differential pressure gauge Px to obtain the differential pressures P1, P2, P3, and P4 in a time-division manner.

3. The system according to claim 2, characterized in that, The data acquisition methods under the first operating condition include: Step 1: Turn off all electromagnetic switches, power on differential pressure gauge Px and zero it, start the intercooler high-pressure two-stage filter integrated system to the predetermined operating condition; Step 2: Turn on S1+ and S1- in sequence, read the differential pressure gauge Px value as P1, and then turn off S1+ and S1-. Step 3: Turn on S2+ and S2- in sequence, read the differential pressure gauge Px value as P2, and then turn off S2+ and S2-. Step 4: Turn on S3+ and S3- in sequence, read the differential pressure gauge Px value as P3, and then turn off S3+ and S3-. Step 5: Turn on S4+ and S4- in sequence, read the differential pressure gauge Px value as P4, and then turn off S4+ and S4-.

4. The system according to claim 1, characterized in that, The second operating condition is that the differential pressure gauge can only withstand the system differential pressure on both sides and cannot withstand the system high pressure on one side. Under the second operating condition: The 12-channel electromagnetic switch includes: S1-, S2-, S3-, S4-, one end of each is connected to pressure acquisition heads A, B, C, and D respectively, and the other end is connected to the low-pressure end of differential pressure gauge Px; S1+, S2+, S3+, and S4+ are each connected at one end to pressure acquisition heads B, E, E, and E respectively, and at the other end to the high-pressure end of differential pressure gauge Px. S10, S20, S30, and S40 are each connected across the low-pressure end and the high-pressure end of the differential pressure gauge Px. The electromagnetic switches are controlled sequentially so that the differential pressure gauge Px achieves pressure balance at both ends through corresponding S10 / S20 / S30 / S40 before each measurement, and then the differential pressures P1, P2, P3, and P4 are obtained in time-division manner.

5. The system according to claim 4, characterized in that, The data acquisition methods under the second operating condition include: Step 1: Turn off all electromagnetic switches, power on differential pressure gauge Px and zero it, start the intercooler high-pressure two-stage filter integrated system to the predetermined operating condition; Step 2: Turn on S10, then turn on S1+ and S1- in sequence, turn off S10, and read the differential pressure gauge Px reading as P1; turn on S10 again and then turn off S1+ and S1-. Step 3: Turn on S20, then turn on S2+ and S2- in sequence, turn off S20, and read the differential pressure gauge Px reading as P2; turn on S20 again and then turn off S2+ and S2-. Step 4: Turn on S30, then turn on S3+ and S3- in sequence, turn off S30, and read the differential pressure gauge Px reading as P3; turn on S30 again and then turn off S3+ and S3-. Step 5: Turn on S40, then turn on S4+ and S4- in sequence, turn off S40, and read the differential pressure gauge Px reading as P4; turn on S40 again and then turn off S4+ and S4-.

6. The system according to any one of claims 1 to 5, characterized in that, The electromagnetic switch can be replaced by a manual valve switch, a pneumatic valve switch, or other switching elements that can open or close a fluid passage.

7. The system according to claim 6, characterized in that, The intercooler high-pressure two-stage filter integrated system is a test object under actual vehicle conditions or test bench conditions.

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