Method and device for detecting carbon deposition amount of exhaust passage

Abstract

The invention relates to a method and device for detecting the carbon deposition amount of an exhaust duct, and the method comprises the steps: collecting the emission of particulate matters in the exhaust of a target engine under the conditions of different rotating speeds and fuel injection amounts, and forming an exhaust particulate matter emission chart; calibrating the output power of the target engine under the conditions of different rotating speeds and fuel injection quantities to form an engine output power chart; according to the exhaust particulate matter emission chart and the engine output power chart, the accumulated emission amount of the exhaust particulate matter is calculated; calculating an exhaust passage particulate matter adhesion amount coefficient according to the particulate matter emission in the exhaust; and calculating the particulate matter adhesion mass in the exhaust passage according to the exhaust passage particulate matter adhesion amount coefficient and the accumulated emission amount of the exhaust particulate matters. The particulate matter cumulant in the exhaust gas can be scientifically calculated by actually collecting the exhaust particulate matter emission data under the conditions of different rotating speeds and fuel injection quantities, and the accuracy of a detection result is ensured.

Description

Technical Field

[0001] The present invention relates to the field of engine technology, and in particular to a method and device for detecting the amount of carbon deposits in an exhaust duct. Background Art

[0002] With the continuous advancement of modern automotive technology, engine performance and emission standards are becoming increasingly important factors affecting vehicle competitiveness. During daily use, the engine exhaust tract, exposed to long-term high temperatures and high pressures, gradually accumulates large amounts of particulate matter and carbon deposits. These deposits not only reduce exhaust flow capacity but also increase exhaust resistance, resulting in reduced intake airflow. This ultimately impacts overall engine performance, manifesting as insufficient power, increased fuel consumption, and excessive emissions.

[0003] Currently, there are relatively few methods for detecting and evaluating carbon deposits in engine exhaust tracts, often relying on experience or simple visual inspection. These methods lack accuracy and reliability, making it difficult to provide a scientific basis for engine maintenance and performance correction. Summary of the Invention

[0004] To solve the above problems, an object of the embodiments of the present invention is to provide a method and device for detecting the amount of carbon deposits in an exhaust duct.

[0005] A method for detecting the amount of carbon deposits in an exhaust duct, comprising:

[0006] Step 1: Collect the particulate matter emissions from the target engine at different speeds and fuel injection rates to generate an exhaust particulate matter emission chart;

[0007] Step 2: Calibrate the output power of the target engine at different speeds and fuel injection amounts to form an engine output power chart;

[0008] Step 3: Calculate the cumulative exhaust particulate matter emissions based on the exhaust particulate matter emission chart and the engine output power chart;

[0009] Step 4: Calculate the exhaust duct particulate matter adhesion coefficient based on the particulate matter emissions in the exhaust gas;

[0010] Step 5: Calculate the particle attachment mass in the exhaust duct based on the exhaust duct particle attachment coefficient and the cumulative exhaust particle emissions.

[0011] Preferably, in step 1, the exhaust particulate matter emission chart is constructed with the engine speed as the x-axis, the fuel injection amount as the y-axis, and the exhaust particulate matter emission as the z-axis.

[0012] Preferably, in step 2, the engine output power graph is constructed with the engine speed as the x-axis, the fuel injection amount as the y-axis, and the engine output power as the z-axis.

[0013] Preferably, in step 3, the cumulative emission of exhaust particulate matter is calculated as follows:

[0014] The cumulative emission of exhaust particulate matter = engine output power * particulate matter emission in exhaust * engine operating time.

[0015] Preferably, in step 4, the calculation formula for the exhaust duct particulate matter adhesion coefficient is:

[0016] Exhaust duct particulate matter adhesion coefficient = mass of particulate matter adhered to the exhaust duct per unit time / (mass of particulate matter adhered to the exhaust duct per unit time + particulate matter emissions in the exhaust per unit time).

[0017] Preferably, in step 5, the calculation formula for the mass of particulate matter attached in the exhaust duct is:

[0018] The mass of particulate matter attached in the exhaust duct = exhaust duct particulate matter attachment coefficient * cumulative exhaust particulate matter emissions.

[0019] The present invention also provides a device for detecting the amount of carbon deposits in an exhaust duct, comprising:

[0020] An exhaust particulate matter detection module is used to collect particulate matter emissions from the target engine at different speeds and fuel injection rates and generate an exhaust particulate matter emission chart; the exhaust particulate matter emissions include particulate matter attached to the exhaust duct and particulate matter discharged through the exhaust duct;

[0021] The engine output power calibration module is used to calibrate the output power of the target engine at different speeds and fuel injection amounts to form an engine output power chart;

[0022] a cumulative emission calculation module, configured to calculate cumulative exhaust particulate matter emissions based on an exhaust particulate matter emission chart and an engine output power chart;

[0023] An attachment coefficient calculation module is used to calculate the exhaust duct particle attachment coefficient based on the particle attachment amount in the exhaust duct;

[0024] The exhaust duct particulate matter adhesion detection module is used to calculate the particulate matter adhesion mass in the exhaust duct based on the exhaust duct particulate matter adhesion coefficient and the cumulative emission of exhaust particulate matter.

[0025] The present invention also provides an electronic device, comprising a bus, a transceiver, a memory, a processor, and a computer program stored in the memory and runnable on the processor, wherein the transceiver, the memory, and the processor are connected via the bus, and wherein the computer program, when executed by the processor, implements the steps in the above-mentioned method for detecting the amount of carbon deposits in the exhaust duct.

[0026] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps in the above-mentioned method for detecting the amount of carbon deposits in the exhaust duct.

[0027] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0028] The present invention relates to a method for detecting the amount of carbon deposits in the exhaust duct. Compared with the existing technology, the present invention can scientifically calculate the accumulated amount of particulate matter in the exhaust by actually collecting exhaust particulate matter emission data under different speeds and fuel injection amounts, thereby ensuring the accuracy of the detection results.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A flow chart of a method for detecting carbon deposits in an exhaust duct provided by the present invention;

[0032] Figure 2 This is a schematic diagram of the working principle of the engine provided by the present invention. DETAILED DESCRIPTION

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0035] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] See also Figure 1-2 , a method for detecting the amount of carbon deposits in an exhaust duct, comprising:

[0037] Step 1: Collect the particulate matter emissions from the target engine at different speeds and fuel injection rates to generate an exhaust particulate matter emission chart;

[0038] In actual applications, different engines, at different speeds, power, torque, and fuel injection rates, will also generate different combinations of exhaust temperature, exhaust flow, intake temperature, intake flow, and EGR rate. By using sensors to detect these parameters, the operating conditions of the target engine at different speeds and fuel injection rates can be determined.

[0039] When collecting particulate matter emissions in the exhaust, the present invention needs to install high-precision filter paper in the exhaust pipe after the engine turbine, so that particulate matter in the exhaust can be continuously collected. After each test is completed, the particulate matter accumulated in the filter paper is weighed in the high-precision particulate matter weighing equipment in the laboratory to obtain the mass of the particulate matter discharged from the exhaust pipe M_soot_exh (grams). At the same time, the exhaust duct of the engine is disassembled, and the particulate matter attached to the air duct is collected and weighed with high precision to obtain the mass of the particulate matter attached to the exhaust duct M_soot_exh_port. The sum of the two can obtain the particulate matter emissions in the exhaust = M_soot_exh + M_soot_exh_port.

[0040] By collecting the above experimental parameters, the present invention can construct an exhaust particulate matter emission chart with the engine speed as the x-axis, the fuel injection amount as the y-axis, and the particulate matter emission in the exhaust as the z-axis, as shown in Table 1-2.

[0041] Table 1: First exhaust particulate matter emission chart

[0042]

[0043] Table 2 Second exhaust particulate matter emission chart

[0044]

[0045]

[0046] Step 2: Calibrate the output power of the target engine at different speeds and fuel injection amounts to form an engine output power chart; the engine output power chart can be constructed with the engine speed as the x-axis, the fuel injection amount as the y-axis, and the engine output power as the z-axis, as shown in Table 3.

[0047] Table 3 Engine output power chart

[0048]

[0049] Step 3: Calculate the cumulative exhaust particulate matter emissions based on the exhaust particulate matter emission chart and the engine output power chart;

[0050] In step 3, based on the first two charts and combined with the engine usage time at different operating points, the cumulative engine exhaust particulate matter emissions m can be calculated as follows: Z in the first step * Z in the second step * usage time, that is, cumulative exhaust particulate matter emissions = engine output power * particulate matter emissions in the exhaust * engine operating time.

[0051] For example, if the engine works at 1000 rpm and 30 mg / cycle for 5 hours, the cumulative mass of particulate matter emissions = 13.55*0.09662025*5. Similarly, based on the operating conditions and time, the cumulative mass of particulate matter at different operating points can be obtained. Then, the sum of these masses is the cumulative mass of particulate matter emissions during the entire use process.

[0052] Step 4: Calculate the exhaust duct particulate matter adhesion coefficient based on the particulate matter emissions in the exhaust gas;

[0053] In step 4, the exhaust temperature is first obtained through the temperature sensor in the exhaust pipe, and then a chart 4 of exhaust temperature with speed and oil volume is calibrated. At the same time, the exhaust flow rate can be obtained by adding the intake flow rate (obtained by the charging efficiency model or Maf sensor test) and the injection amount, and then a chart 5 of exhaust particulate matter adhesion coefficient based on exhaust temperature and exhaust flow rate is calibrated.

[0054] Table 4 Exhaust gas temperature chart

[0055]

[0056] Table 5 Exhaust particulate matter adhesion coefficient chart

[0057]

[0058]

[0059] It should be noted that in step 4, the calculation formula for the exhaust duct particulate matter adhesion coefficient is:

[0060] Exhaust duct particulate matter adhesion coefficient = mass of particulate matter adhered to the exhaust duct per unit time / (mass of particulate matter adhered to the exhaust duct per unit time + particulate matter emissions in the exhaust per unit time).

[0061] Step 5: Calculate the particle attachment mass in the exhaust duct based on the exhaust duct particle attachment coefficient and the cumulative exhaust particle emissions.

[0062] In step 5, the calculation formula for the mass of particulate matter attached in the exhaust duct is:

[0063] The mass of particulate matter attached in the exhaust duct = exhaust duct particulate matter attachment coefficient * cumulative exhaust particulate matter emissions.

[0064] By actually collecting exhaust particulate matter emission data under different speeds and fuel injection amounts, the present invention can scientifically calculate the accumulated amount of particulate matter in the exhaust, ensuring the accuracy of the test results. When the mass of particulate matter attached in the exhaust duct exceeds a preset value, an alarm will also be issued to remind the staff to clean it to improve the engine's operating efficiency.

[0065] The present invention also provides a device for detecting the amount of carbon deposits in an exhaust duct, comprising:

[0066] An exhaust particulate matter detection module is used to collect particulate matter emissions from the target engine at different speeds and fuel injection rates and generate an exhaust particulate matter emission chart; the exhaust particulate matter emissions include particulate matter attached to the exhaust duct and particulate matter discharged through the exhaust duct;

[0067] The engine output power calibration module is used to calibrate the output power of the target engine at different speeds and fuel injection amounts to form an engine output power chart;

[0068] a cumulative emission calculation module, configured to calculate cumulative exhaust particulate matter emissions based on an exhaust particulate matter emission chart and an engine output power chart;

[0069] An attachment coefficient calculation module is used to calculate the exhaust duct particle attachment coefficient based on the particle attachment amount in the exhaust duct;

[0070] The exhaust duct particulate matter adhesion detection module is used to calculate the particulate matter adhesion mass in the exhaust duct based on the exhaust duct particulate matter adhesion coefficient and the cumulative emission of exhaust particulate matter.

[0071] Compared with the prior art, the beneficial effects of the device for detecting the amount of carbon deposits in the exhaust duct provided by the present invention are the same as the beneficial effects of the method for detecting the amount of carbon deposits in the exhaust duct described in the above technical solution, and will not be described in detail here.

[0072] The present invention also provides an electronic device, comprising a bus, a transceiver, a memory, a processor, and a computer program stored in the memory and runnable on the processor, wherein the transceiver, the memory, and the processor are connected via the bus, and is characterized in that when the computer program is executed by the processor, the steps in the above-mentioned method for detecting the amount of carbon deposits in the exhaust duct are implemented. Compared with the prior art, the beneficial effects of the electronic device provided by the present invention are the same as the beneficial effects of the method for detecting the amount of carbon deposits in the exhaust duct described in the above-mentioned technical solution, and will not be elaborated here.

[0073] The present invention also provides a computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps in the above-mentioned method for detecting the amount of carbon deposits in the exhaust duct are implemented. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present invention are the same as the beneficial effects of the method for detecting the amount of carbon deposits in the exhaust duct described in the above-mentioned technical solution, and will not be repeated here.

[0074] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technical solution that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A method for detecting the amount of carbon deposits in an exhaust duct, characterized in that: include: Step 1: Collect the particulate matter emissions from the target engine at different speeds and fuel injection rates to generate an exhaust particulate matter emission chart; Step 2: Calibrate the output power of the target engine at different speeds and fuel injection amounts to form an engine output power chart; Step 3: Calculate the cumulative exhaust particulate matter emissions based on the exhaust particulate matter emission chart and the engine output power chart; Step 4: Calculate the exhaust duct particulate matter adhesion coefficient based on the particulate matter emissions in the exhaust gas; Step 5: Calculate the particle attachment mass in the exhaust duct based on the exhaust duct particle attachment coefficient and the cumulative exhaust particle emissions.

2. The method for detecting the amount of carbon deposits in the exhaust duct according to claim 1, characterized in that: In step 1, the exhaust particulate matter emission graph is constructed with the engine speed as the x-axis, the fuel injection amount as the y-axis, and the exhaust particulate matter emission as the z-axis.

3. The method for detecting the amount of carbon deposits in the exhaust duct according to claim 2, characterized in that: In step 2, an engine output power graph is constructed with the engine speed as the x-axis, the fuel injection amount as the y-axis, and the engine output power as the z-axis.

4. The method for detecting the amount of carbon deposits in the exhaust duct according to claim 3, characterized in that: In step 3, the cumulative exhaust particulate matter emissions are calculated as follows: The cumulative emission of exhaust particulate matter = engine output power * particulate matter emission in exhaust * engine operating time.

5. The method for detecting the amount of carbon deposits in the exhaust duct according to claim 1, characterized in that: In step 4, the calculation formula for the exhaust duct particulate matter adhesion coefficient is: Exhaust duct particulate matter adhesion coefficient = mass of particulate matter adhered to the exhaust duct per unit time / (mass of particulate matter adhered to the exhaust duct per unit time + particulate matter emissions in the exhaust per unit time).

6. The method for detecting the amount of carbon deposits in the exhaust duct according to claim 5, characterized in that: In step 5, the calculation formula for the mass of particulate matter attached in the exhaust duct is: The mass of particulate matter attached in the exhaust duct = exhaust duct particulate matter attachment coefficient * cumulative exhaust particulate matter emissions.

7. A device for detecting the amount of carbon deposits in an exhaust duct, characterized in that: include: The exhaust particulate matter detection module is used to collect the particulate matter emissions from the exhaust of the target engine at different speeds and fuel injection rates, and generate an exhaust particulate matter emission chart; The particulate matter emissions in the exhaust gas include: particulate matter attached to the exhaust duct and particulate matter discharged through the exhaust duct; The engine output power calibration module is used to calibrate the output power of the target engine at different speeds and fuel injection amounts to form an engine output power chart; a cumulative emission calculation module, configured to calculate cumulative exhaust particulate matter emissions based on an exhaust particulate matter emission chart and an engine output power chart; An attachment coefficient calculation module is used to calculate the exhaust duct particle attachment coefficient based on the particle attachment amount in the exhaust duct; The exhaust duct particulate matter adhesion detection module is used to calculate the particulate matter adhesion mass in the exhaust duct based on the exhaust duct particulate matter adhesion coefficient and the cumulative emission of exhaust particulate matter.

8. An electronic device comprising a bus, a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the transceiver, the memory, and the processor are connected via the bus, wherein: When the computer program is executed by the processor, the steps of the method for detecting the amount of carbon deposits in the exhaust passage are implemented as claimed in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for detecting the amount of carbon deposits in the exhaust passage are implemented as claimed in any one of claims 1 to 6.

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