CN116447054A - Automobile air inlet system and ash leakage detection method thereof - Google Patents

Automobile air inlet system and ash leakage detection method thereof Download PDF

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Publication number
CN116447054A
CN116447054A CN202310233516.XA CN202310233516A CN116447054A CN 116447054 A CN116447054 A CN 116447054A CN 202310233516 A CN202310233516 A CN 202310233516A CN 116447054 A CN116447054 A CN 116447054A
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China
Prior art keywords
air
preset
air inlet
engine
dust concentration
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Application number
CN202310233516.XA
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Chinese (zh)
Inventor
梁志秀
许家毅
方有虎
池家明
傅汉喜
林建强
黄云羽
周小刚
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Dongfeng Liuzhou Motor Co Ltd
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Dongfeng Liuzhou Motor Co Ltd
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Priority to CN202310233516.XA priority Critical patent/CN116447054A/en
Publication of CN116447054A publication Critical patent/CN116447054A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
    • F02M35/09—Clogging indicators ; Diagnosis or testing of air cleaners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10157—Supercharged engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10373—Sensors for intake systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention discloses an automobile air inlet system and an ash leakage detection method thereof, wherein the automobile air inlet system comprises an air filter, a supercharger, an intercooler, an engine, a post-processor, two dust concentration sensors and a control device, the supercharger comprises an air compressor and a turbine, an air inlet of the air compressor is communicated with an air outlet of the air filter, an air inlet of the intercooler is communicated with an air outlet of the air compressor, an air inlet of the engine is communicated with an air outlet of the intercooler, an air outlet of the engine is communicated with an air inlet of the turbine, an air inlet of the post-processor is communicated with an air outlet of the turbine, an air outlet of the post-processor is used for being communicated with the outside, the two dust concentration sensors are respectively arranged at the air inlet and the air outlet of the air filter, and the control device is electrically connected with the two dust concentration sensors, so that in an initial stage of ash leakage of the automobile air inlet system can be reminded of timely repair of a driver, early abrasion of the engine is avoided, the service life of the engine is influenced, and the purpose of ensuring reliable operation of the engine is achieved.

Description

Automobile air inlet system and ash leakage detection method thereof
Technical Field
The invention relates to the technical field of automobiles, in particular to an automobile air inlet system and an ash leakage detection method thereof.
Background
In a typical air inlet system of a heavy-duty car in the market, dust is filtered through an air filter, an air filter blocking sensor is arranged on a pipeline after air filtering, an alarm is given after an air filter element is blocked by the dust, or the filter element is cleaned or replaced when the air filter element is blocked by a method for periodically maintaining the air filter element, so that the air inflow of an engine is ensured. However, the air inlet system can only ensure that sufficient air is supplied to the engine, when ash leakage occurs due to breakage of the air filter element, the air inlet system cannot be found in time so as to remind a driver to overhaul, oil burst caused by abrasion of a supercharger, increased engine oil consumption of the engine, acceleration blockage of an engine post-processor and other faults are easily caused, and early abrasion of the engine is caused when the faults are serious, so that the service life of the engine is influenced.
Disclosure of Invention
The invention mainly aims to provide an automobile air inlet system and a ash leakage detection method thereof, and aims to solve the problems that in the prior art, when ash leakage occurs due to breakage of an air filter element, the air filter element cannot be found timely so as to remind a driver to overhaul, oil leakage caused by abrasion of a supercharger is easy to occur, engine oil consumption of an engine is increased, PDF (portable document format) is accelerated to block after-treatment of the engine, and the like, and when serious, early abrasion of the engine is caused, the service life of the engine is influenced and the like.
In order to achieve the above object, the present invention provides an air intake system for an automobile, comprising: an air filter;
the supercharger comprises a compressor and a turbine, and an air inlet of the compressor is communicated with an air outlet of the air filter;
the air inlet of the intercooler is communicated with the air outlet of the air compressor;
the air inlet of the engine is communicated with the air outlet of the intercooler, and the air outlet of the engine is communicated with the air inlet of the turbine;
the air inlet of the post-processor is communicated with the air outlet of the turbine, and the air outlet of the post-processor is communicated with the outside;
the two dust concentration sensors are respectively arranged at the air inlet and the air outlet of the air filter; the method comprises the steps of,
and the control device is electrically connected with the two dust concentration sensors.
Optionally, the air filter is communicated with the air compressor through a first pipeline;
the automobile air inlet system further comprises an air flow meter electrically connected with the control device, and the air flow meter is arranged on the first pipeline; and/or the number of the groups of groups,
the automobile air inlet system further comprises a liquid level sensor electrically connected with the control device, and the liquid level sensor is arranged in an oil pan of the engine; and/or the number of the groups of groups,
the automobile air inlet system further comprises a pressure difference sensor electrically connected with the control device, and the pressure difference sensor is installed on the postprocessor and used for detecting the pressure difference value of the air inlet and the air outlet of the postprocessor.
The invention also provides a method for detecting ash leakage of the automobile air inlet system, which comprises the following steps:
respectively obtaining a first dust concentration value of an air inlet of the air filter and a second dust concentration value of an air outlet, and calculating the actual filtering efficiency of the air filter according to the first dust concentration value and the second dust concentration value;
comparing the second dust concentration with a preset dust concentration, and comparing the actual filtering efficiency of the air filter with a preset filtering efficiency;
and when the second dust concentration is larger than the preset dust concentration and the actual filtering efficiency is smaller than the preset filtering efficiency, sending out an air filter filtering abnormality signal.
Optionally, setting the preset filtering efficiency as P, wherein the preset filtering efficiency is set as P, and P is more than or equal to 99.5%; and/or the number of the groups of groups,
setting the preset dust concentration C1, wherein: c1 is less than or equal to 0.02mg/m 3 。
Optionally, the air inlet system of the automobile further comprises a gas output flow path communicated with the air outlet of the air compressor, and the intercooler, the engine, the turbine and the after-processor are all positioned on the gas output flow path;
when the second dust concentration is greater than the preset dust concentration and the actual filtering efficiency is less than the preset filtering efficiency, the step of sending out the air filter abnormal filtering signal further comprises the following steps:
acquiring actual control parameters of the gas output flow path;
and comparing the actual control parameter with a preset control condition to determine the ash leakage position.
Optionally, the branch flow path comprises an inter-cooling air inlet flow path arranged between the supercharger and the inter-cooling air conditioner, and the inter-cooling air inlet flow path is provided with an oil gas content sensor electrically connected with the control device;
a liquid level sensor electrically connected with the control device is arranged in the oil pan of the engine;
the post processor is provided with a differential pressure sensor electrically connected with the control device;
the actual comparison parameters comprise the actual oil gas content of the intercooling air inlet flow path and/or the actual engine oil consumption of the engine and/or the actual differential pressure value of the air inlet and the air outlet of the after-treatment device in unit time.
Optionally, the air filter is communicated with the air compressor through a first pipeline;
the step of comparing the actual control parameter with a preset control condition to determine the ash leakage position comprises the following steps:
when the ratio of the actual engine oil consumption to the preset engine oil consumption of the engine meets a first preset condition, determining that the air filter leaks ash and/or the first pipeline leaks ash; and/or the number of the groups of groups,
optionally, the air filter is communicated with the air compressor through a first pipeline;
the step of comparing the actual control parameter with a preset control condition to determine the ash leakage position comprises the following steps:
and when the ratio of the actual pressure difference value to the preset pressure difference value of the air inlet and the air outlet of the post-processor in unit time meets a second preset condition, determining that the air filter leaks ash and/or the first pipeline leaks ash.
Optionally, the actual oil consumption is set to be H1, the preset oil consumption is set to be H2, and the first preset condition includes:
H1/H2≥1.2。
optionally, setting the actual differential pressure value as P D1 The preset differential pressure value is P D2 The second preset condition includes:
P D1 /P D2 ≥1.2。
according to the technical scheme, the automobile air inlet system comprises an air filter, a supercharger, an intercooler, an engine, a postprocessor, two dust concentration sensors and a control device, wherein the supercharger comprises an air compressor and a turbine, an air inlet of the air compressor is communicated with an air outlet of the air filter, an air inlet of the intercooler is communicated with an air outlet of the air compressor, an air inlet of the engine is communicated with an air outlet of the intercooler, an air outlet of the engine is communicated with an air inlet of the turbine, an air inlet of the postprocessor is communicated with an air outlet of the turbine, an air outlet of the postprocessor is communicated with the outside, the two dust concentration sensors are respectively arranged at the air inlet and the air outlet of the air filter, and the control device is electrically connected with the two dust concentration sensors, so that dust concentrations of the air inlet and the air outlet of the air filter are respectively measured, whether the air inlet of the air filter is abnormal or not can be effectively analyzed, and therefore an early stage of ash leakage of the automobile air inlet system can be reminded, the engine is timely repaired, the abrasion of the engine can be avoided, and the purpose of timely repairing the engine is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of an air intake system for an automobile according to the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a method for detecting ash leakage in an air intake system of an automobile according to the present invention;
fig. 3 is a schematic flow chart of a second embodiment of the ash leakage detection method of an air intake system of an automobile.
Reference numerals illustrate:
reference numerals Name of the name Reference numerals Name of the name
100 Automobile air intake system 7 Engine with a motor
1 First pipeline 8 Control device
3 Air filter 9 Dust concentration sensor
4 Supercharger 10 Air flowmeter
41 Air compressor 110 Oil gas content sensor
42 Turbine engine 120 Liquid level sensor
5 Post-processor 130 Differential pressure sensor
6 Intercooler 140 Display screen
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
In a typical air inlet system of a heavy-duty car in the market, dust is filtered through an air filter, an air filter blocking sensor is arranged on a pipeline after air filtering, an alarm is given after an air filter element is blocked by the dust, or the filter element is cleaned or replaced when the air filter element is blocked by a method for periodically maintaining the air filter element, so that the air inflow of an engine is ensured. However, the air inlet system can only ensure that sufficient air is supplied to the engine, when ash leakage occurs due to breakage of the air filter element, the air inlet system cannot be found in time so as to remind a driver to overhaul, oil burst caused by abrasion of a supercharger and increased engine oil consumption are easily caused, and faults such as PDF acceleration blockage and the like are processed after the engine, and early abrasion of the engine can be caused when the faults are serious, so that the service life of the engine is influenced.
The invention provides an automobile air intake system, fig. 1 is a schematic diagram of an embodiment of the automobile air intake system provided by the invention, and fig. 2 to 3 are flowcharts of an embodiment of a method for detecting ash leakage of the automobile air intake system provided by the invention.
Referring to fig. 1, an air intake system 100 of an automobile includes an air filter 3, a supercharger 4, an intercooler 6, an engine 7, a post-processor 5, two dust concentration sensors 9 and a control device 8, wherein the supercharger 4 includes a compressor 41 and a turbine 42, an air inlet of the compressor 41 is communicated with an air outlet of the air filter 3, an air inlet of the intercooler 6 is communicated with an air outlet of the compressor 41, an air inlet of the engine 7 is communicated with an air outlet of the intercooler 6, an air outlet of the engine 7 is communicated with an air inlet of the turbine 42, an air inlet of the post-processor 5 is communicated with an air outlet of the turbine 42, an air outlet of the post-processor 5 is communicated with the outside, the two dust concentration sensors 9 are respectively arranged at the air inlet and the air outlet of the air filter 3, and the control device 8 is electrically connected with the two dust concentration sensors 9.
In the technical scheme provided by the invention, an automobile air inlet system 100 comprises an air filter 3, a supercharger 4, an intercooler 6, an engine 7, a post-processor 5, two dust concentration sensors 9 and a control device 8, wherein the supercharger 4 comprises an air compressor 41 and a turbine 42, an air inlet of the air compressor 41 is communicated with an air outlet of the air filter 3, an air inlet of the intercooler 6 is communicated with an air outlet of the air compressor 41, an air inlet of the engine 7 is communicated with an air outlet of the intercooler 6, an air outlet of the engine 7 is communicated with an air inlet of the turbine 42, an air inlet of the post-processor 5 is communicated with an air outlet of the turbine 42, the gas outlet of the post-processor 5 is used for being communicated with the outside, two dust concentration sensors 9 are respectively arranged at the gas inlet and the gas outlet of the air filter 3, the control device 8 is electrically connected with the two dust concentration sensors 9, and the dust concentration of the gas inlet and the gas outlet of the air filter 3 is respectively measured through the two dust concentration sensors 9, so that whether the air filter 3 is abnormal in filtration can be effectively analyzed, and a driver can be reminded of timely repair at the initial stage of ash leakage of the automobile gas inlet system 100, early abrasion of the engine 7 is avoided, the service life of the engine 7 is influenced, and the purpose of ensuring reliable operation of the engine 7 is achieved.
Further, since the measurement accuracy of the dust concentration sensor 9 is limited by the gas flow speed and the measurement accuracy of the equipment, in order to avoid misjudgment, according to the bad result caused by ash leakage of the air-filtered pipeline, the air filter 3 is communicated with the air compressor 41 through the first pipeline 1, the automobile air intake system 100 further comprises an air flow meter 10 electrically connected with the control device 8, the air flow meter 10 is arranged on the first pipeline 1, and the current air intake flow of the engine 7 is collected through the air flow meter 10.
Further, since the measurement accuracy of the dust concentration sensor 9 is limited by the gas flow speed and the measurement accuracy of the equipment, in order to avoid erroneous judgment, according to the bad results caused by ash leakage of the air-filtered pipeline, the automobile air intake system 100 further comprises a liquid level sensor 120 electrically connected with the control device 8, wherein the liquid level sensor 120 is arranged in the oil pan of the engine 7, and the oil consumption of the engine 7 is collected through the liquid level sensor 120.
Further, since the measurement accuracy of the dust concentration sensor 9 is limited by the gas flow speed and the measurement accuracy of the equipment, in order to avoid erroneous judgment, according to the bad results caused by ash leakage from the air-filtered pipeline, the air intake system 100 of the automobile further comprises a differential pressure sensor 130 electrically connected with the control device 8, the differential pressure sensor 130 is installed in the post-processor 5, and the differential pressure value of the air inlet and the air outlet of the post-processor 5 is detected by the differential pressure sensor 130, so as to collect the blocking condition of the post-processor 5.
It should be noted that, the air flow meter 10, the liquid level sensor 120, and the differential pressure sensor 130 may be alternatively or simultaneously set, and when a plurality of types are simultaneously set, the accuracy of the detection result is greatly improved.
In order to facilitate the operator to obtain the working state of the air intake system 100, the air intake system 100 further includes a display screen 140, wherein the display screen 140 is installed in the cab, and the display screen 140 is electrically connected to the control device 8, so as to allow monitoring personnel to observe in real time.
The present invention also provides a method for detecting ash leakage of an air intake system 100 of an automobile, referring to fig. 2, in a first embodiment of the method for detecting ash leakage of an air intake system 100 of an automobile provided by the present invention, the method for detecting ash leakage of an air intake system 100 of an automobile comprises the following steps:
step S10, respectively obtaining a first dust concentration value of an air inlet of the air filter 3 and a second dust concentration value of an air outlet, and calculating the actual filtering efficiency of the air filter 3 according to the first dust concentration value and the second dust concentration value;
step S20, comparing the second dust concentration with a preset dust concentration, and comparing the actual filtering efficiency of the air filter 3 with a preset filtering efficiency;
and step S30, when the second dust concentration is larger than the preset dust concentration and the actual filtering efficiency is smaller than the preset filtering efficiency, sending out an abnormal filtering signal of the air filter 3.
Specifically, in step S30:
the preset filtering efficiency is set to be P, wherein P is more than or equal to 99.5%, and the dust content is reduced, the abrasion of the supercharger 4 is avoided, and the service life of the engine 7 is prolonged.
Setting the preset dust concentration C1, wherein: c1 is less than or equal to 0.02mg/m 3 Thus, the problem of abnormal filtration of the erroneous air judgment filter 3 due to low dust concentration in the ambient air is avoided.
It should be noted that, the above range of preset filtration efficiency and the range of preset dust concentration may be alternatively or simultaneously satisfied, and when both are satisfied, the effect is best.
Specifically, the automobile air inlet system further comprises a gas output flow path communicated with the air outlet of the air compressor, wherein the intercooler, the engine, the turbine and the aftertreatment device are all positioned on the gas output flow path; referring to fig. 3, step S30 further includes, after the step of sending out the air filter 3 abnormal filtering signal when the second dust concentration is greater than the preset dust concentration and the actual filtering efficiency is less than the preset filtering efficiency:
step S40, acquiring actual comparison parameters of the gas output flow path;
and S50, comparing the actual control parameters with preset control conditions to determine the ash leakage position.
Specifically, a liquid level sensor 120 electrically connected to the control device 8 is provided in the oil pan of the engine 7;
the post processor 5 is provided with a differential pressure sensor 130 electrically connected with the control device 8;
in step S50, the actual comparison parameters include the actual engine oil consumption of the engine 7 and/or the actual pressure difference between the air inlet and the air outlet of the post-processor 5 in unit time, so as to transmit the actual engine oil consumption of the engine 7 and/or the actual pressure difference between the air inlet and the air outlet of the post-processor 5 in unit time to the control device 8, and compare the preset filtering efficiency of the air filter 3, the preset engine oil consumption of the engine 7 and the theoretical blocking amount of the post-processor 5 according to the accumulated air amount of the engine 7 for a period of time, thereby determining the ash leakage position, and early warning the ash leakage to remind the driver to detect and repair in time, avoiding early wear of the engine 7, affecting the service life of the engine 7, and achieving the purpose of ensuring reliable operation of the engine 7.
The air filter is communicated with the air compressor through a first pipeline 1; step S50 compares the actual reference parameter with a preset reference condition to determine a position of ash leakage, including:
step S501b, when the ratio of the actual oil consumption of the engine 7 to the preset oil consumption satisfies a first preset condition, determining that the air filter 3 leaks ash and/or the first pipeline 1 leaks ash;
it should be noted that, when the air filter 3 leaks ash and/or the air post-filtration pipeline 11 leaks ash, dust goes to the engine 7, which may cause an increase in the oil consumption of the engine 7, in this step, the actual oil consumption is set to be H1, the preset oil consumption is set to be H2, and the first preset condition includes 1.2 being less than or equal to H1/H2, that is, when the actual oil consumption is increased by 20% compared with the preset oil consumption, the control device 8 analyzes that the air filter 3 leaks ash and/or the first pipeline 1 leaks ash in combination with the air post-filtration dust concentration, and reminds the driver of an ash leakage fault, so as to remind the driver to overhaul.
The air filter is communicated with the air compressor through a first pipeline 1; step S50 compares the actual reference parameter with a preset reference condition to determine a position of ash leakage, including:
step S501c, when the ratio of the actual differential pressure value between the air inlet and the air outlet of the post-processor 5 and the preset differential pressure value in unit time meets a second preset condition, determining that the air filter 3 leaks ash and/or the first pipeline 1 leaks ash.
When the air filter 3 leaks ash and/or the first pipeline 1 leaks ash, dust is burned by the engine 7 and discharged into the post-processor 5 along with the exhaust pipe, so that the post-processor 5 is accelerated to be blocked, and in the step, the actual differential pressure value is set to be P D1 The preset differential pressure value is P D2 The second preset condition comprises P which is less than or equal to 1.2 D1 /P D2 . According to the method, the pressure change quantity of the differential pressure sensor 130 of the post-processor 5 is combined with the accumulated air inflow of the engine 7, when the pressure increase speed of the differential pressure sensor 130 is increased by 20% -40% compared with the theoretical value, the control device 8 analyzes ash leakage of the air filter 3 and/or ash leakage of the first pipeline 1 by combining the dust concentration after air filtration, and reminds a driver of ash leakage faults and reminds the driver of maintenance.
Further, the step S501a, the step S501b, and the step S501c may be provided alternatively or simultaneously, and when they are provided simultaneously, the accuracy of the detection is improved, and the effect is good.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims (10)

1. An automotive air intake system, comprising:
an air filter;
the supercharger comprises a compressor and a turbine, and an air inlet of the compressor is communicated with an air outlet of the air filter;
the air inlet of the intercooler is communicated with the air outlet of the air compressor;
the air inlet of the engine is communicated with the air outlet of the intercooler, and the air outlet of the engine is communicated with the air inlet of the turbine;
the air inlet of the post-processor is communicated with the air outlet of the turbine, and the air outlet of the post-processor is communicated with the outside;
the two dust concentration sensors are respectively arranged at the air inlet and the air outlet of the air filter; the method comprises the steps of,
and the control device is electrically connected with the two dust concentration sensors.
2. The air intake system of claim 1, wherein the air filter is in communication with the compressor via a first conduit;
the automobile air inlet system further comprises an air flow meter electrically connected with the control device, and the air flow meter is arranged on the first pipeline; and/or the number of the groups of groups,
the automobile air inlet system further comprises a liquid level sensor electrically connected with the control device, and the liquid level sensor is arranged in an oil pan of the engine; and/or the number of the groups of groups,
the automobile air inlet system further comprises a pressure difference sensor electrically connected with the control device, and the pressure difference sensor is installed on the postprocessor and used for detecting the pressure difference value of the air inlet and the air outlet of the postprocessor.
3. A method for detecting ash leakage of an automotive air intake system according to any one of claims 1 to 2, characterized by comprising the steps of:
respectively obtaining a first dust concentration value of an air inlet of the air filter and a second dust concentration value of an air outlet, and calculating the actual filtering efficiency of the air filter according to the first dust concentration value and the second dust concentration value;
comparing the second dust concentration with a preset dust concentration, and comparing the actual filtering efficiency of the air filter with a preset filtering efficiency;
and when the second dust concentration is larger than the preset dust concentration and the actual filtering efficiency is smaller than the preset filtering efficiency, sending out an air filter filtering abnormality signal.
4. The ash leakage detection method according to claim 3, wherein the preset filtration efficiency is set to be P, wherein P is more than or equal to 99.5%; and/or the number of the groups of groups,
setting the preset dust concentration C1, wherein: c1 is less than or equal to 0.02mg/m 3 。
5. The ash leak detection method as defined in claim 3 wherein the automotive air intake system further includes a gas output flow path in communication with the compressor air outlet, the intercooler, the engine, the turbine, and the aftertreatment device being all in the gas output flow path;
when the second dust concentration is greater than the preset dust concentration and the actual filtering efficiency is less than the preset filtering efficiency, the step of sending out the air filter abnormal filtering signal further comprises the following steps:
acquiring actual control parameters of the gas output flow path;
and comparing the actual control parameter with a preset control condition to determine the ash leakage position.
6. The ash leakage detection method according to claim 5, wherein a liquid level sensor electrically connected to the control device is provided in an oil pan of the engine;
the post processor is provided with a differential pressure sensor electrically connected with the control device;
the actual control parameters include the actual oil consumption of the engine and/or the actual differential pressure of the air inlet and the air outlet of the aftertreatment device per unit time.
7. The ash leakage detection method according to claim 6, wherein the air filter is communicated with the air compressor through a first pipeline;
the step of comparing the actual control parameter with a preset control condition to determine the ash leakage position comprises the following steps:
and when the ratio of the actual engine oil consumption to the preset engine oil consumption of the engine meets a first preset condition, determining that the air filter leaks ash and/or the first pipeline leaks ash.
8. The ash leakage detection method according to claim 6, wherein the air filter is communicated with the air compressor through a first pipeline;
the step of comparing the actual control parameter with a preset control condition to determine the ash leakage position comprises the following steps:
and when the ratio of the actual pressure difference value to the preset pressure difference value of the air inlet and the air outlet of the post-processor in unit time meets a second preset condition, determining that the air filter leaks ash and/or the first pipeline leaks ash.
9. The ash leakage detection method according to claim 7, wherein the actual engine oil consumption is set to H1, the preset engine oil consumption is set to H2, and the first preset condition includes:
H1/H2≥1.2。
10. as claimed inThe method for detecting ash leakage according to claim 7, wherein the actual differential pressure value is set to be P D1 The preset differential pressure value is P D2 The second preset condition includes:
P D1 /P D2 ≥1.2。
CN202310233516.XA 2023-03-10 2023-03-10 Automobile air inlet system and ash leakage detection method thereof Pending CN116447054A (en)

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