Engine power correction system, method and working machine based on diesel fuel category

Abstract

The application discloses a diesel product category-based engine power correction system and method and engineering machinery, which comprises an instrument, a fuel water content sensor and a controller. The instrument is used for inputting information of used diesel and transmitting the diesel information to the controller. The fuel water content sensor is used for detecting the water content of diesel and transmitting the diesel water content to the controller. The controller is used for receiving the diesel information and the diesel water content information, and comparing the diesel information with standard petrochemical diesel. The controller calculates corresponding power loss and calculates an injection quantity correction coefficient λ1 according to the power loss. The controller sends the injection quantity correction coefficient λ1 to the engine, and controls the engine to implement the injection quantity corrected by the correction coefficient λ1 into injection control. The controller collects real-time engine speed drop and load rate, and determines the corrected injection quantity W1 for iterative correction. The diesel product category-based engine power correction system can improve market competitiveness, improve product performance and ensure power performance.

Description

Technical Field

[0001] This invention relates to an engine power correction system, method, and engineering machinery based on diesel fuel, belonging to the field of engine technology. Background Technology

[0002] Biodiesel refers to fatty acid methyl esters or ethyl esters formed by esterification of vegetable oils (such as rapeseed oil, soybean oil, peanut oil, etc.), animal oils (such as fish oil, lard, etc.), waste oils, or microbial oils with methanol or ethanol. Due to variations in composition and content, biodiesel exhibits significant differences in calorific value and performance. Compared to petrochemical diesel, biodiesel has a slightly lower calorific value or density, resulting in a reduction in engine power: approximately 10% for mechanical engines and 3%-5% for electronically controlled engines. Because conventional engines cannot automatically identify the type of diesel fuel, using lower-performance biodiesel can lead to problems such as reduced engine power and decreased machine performance.

[0003] Existing construction machinery cannot compensate for the power of the biodiesel products it uses, partly because the characteristics of biodiesel have not been studied in depth enough, and partly because there is no suitable compensation mechanism. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides an engine power correction system, method, and engineering machinery based on diesel fuel.

[0005] To achieve the above objectives, the present invention employs an engine power correction system based on diesel fuel type, comprising:

[0006] The instrument is used to input the fuel information of the diesel fuel used and transmit the fuel information to the controller;

[0007] A fuel water content sensor is installed in an oil-water separator to detect the water content of diesel fuel and transmit the detected water content information to a controller.

[0008] The controller receives fuel information from the instrument and diesel water content information detected by the fuel water content sensor, compares it with standard petrochemical diesel, calculates the corresponding power loss, and calculates the injection quantity correction coefficient λ1 based on the power loss. The controller sends the injection quantity correction coefficient λ1 to the engine and controls the engine to implement the injection quantity corrected by the correction coefficient λ1 in the injection control. At the same time, the controller collects real-time engine speed drop and load rate, and determines the corrected injection quantity W1 based on the speed drop and load rate for iterative correction.

[0009] As an improvement, the oil information includes the density and calorific value of the diesel fuel used.

[0010] As an improvement, the power loss is:

[0011] (The difference between the heat generated by standard petrochemical diesel per unit volume and the heat generated by the used diesel per unit volume) / the heat generated by standard petrochemical diesel per unit volume;

[0012] That is, power loss=(Q1-Q2) / Q1, where Q1=ρ1×V1×q1, Q2=ρ2×V2×q2;

[0013] In the formula, Q1 is the heat generated by standard petrochemical diesel, q1 is the calorific value of standard petrochemical diesel, ρ1 is the density of standard petrochemical diesel, and V1 is the volume of standard petrochemical diesel (the unit volume is 1L); Q2 is the heat generated by the used diesel, q2 is the calorific value of the used diesel, ρ2 is the density of the used diesel, and V2 is the volume of the used diesel.

[0014] As an improvement, when Q1>Q2, the calculation method of the fuel injection quantity correction coefficient λ1 is λ1=(Q1-Q2) / Q2, 0<λ1.

[0015] As an improvement, when Q1<Q2, the calculation method of the fuel injection quantity correction coefficient λ1 is λ1=(Q1-Q2) / Q2, λ1<0.

[0016] In addition, the present invention also provides an engine power correction method based on diesel type, which adopts the above-mentioned engine power correction system based on diesel type, and comprises the following steps:

[0017] S1. The driver inputs the oil product information of the used diesel into the instrument, including the density and calorific value of the used diesel;

[0018] S2. The controller compares the input density and calorific value of diesel with the standard petrochemical diesel in combination with the diesel water content information detected by the fuel water sensor in the oil-water separator, so as to obtain the corresponding power loss;

[0019] S3. The controller calculates the fuel injection quantity correction coefficient λ1 according to the power loss;

[0020] S4. The engine applies the fuel injection quantity corrected by the fuel injection quantity correction coefficient λ1 to the fuel injection control;

[0021] S5. The controller collects the real-time engine speed drop and load rate;

[0022] S6. The controller jointly determines the corrected fuel injection quantity W1 according to the engine speed drop and the load rate to perform iterative correction.

[0023] As an improvement, in step S4, the engine implements the corrected fuel injection quantity into the fuel injection control, and the controller incorporates the fuel injection quantity correction coefficient λ1 into the fuel injection control strategy to precisely control the final fuel injection quantity.

[0024] As an improvement, in step S5, the controller collects real-time engine speed drop and load rate, and applies the compensated fuel injection quantity to the engine operation by correcting the fuel injection quantity through the fuel injection quantity correction coefficient λ1; at the same time, the controller adds a compensating fuel injection quantity to improve the engine responsiveness based on the actual engine speed drop value and engine load rate.

[0025] As an improvement, the compensated fuel injection quantity is obtained by looking up data in a calibrated table in the engine software. This table is determined by the engine speed drop value and the engine load rate. The compensated fuel injection quantity is the specific fuel injection quantity value, which is added to the final calculation result of the total fuel injection quantity.

[0026] Finally, the present invention also provides an engineering machinery, wherein the engineering machinery is equipped with the aforementioned diesel-based engine power correction system; or, the aforementioned diesel-based engine power correction method is used.

[0027] Compared with existing technologies, the diesel-based engine power correction system of the present invention can save energy, eliminate emissions pollution, be clean and environmentally friendly, enhance market competitiveness and product performance, and ensure power performance. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the process of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the present invention;

[0031] Figure 3 For the existing engine speed drop values ​​and engine load rate tables;

[0032] Figure 4 This describes the relationship between engine speed, power, and torque. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0034] like Figure 1 , Figure 2 As shown, an engine power correction system based on diesel fuel type includes an instrument, a fuel water content sensor, and a controller.

[0035] The instrument is used to input the fuel information of the diesel fuel, such as the density and calorific value of the diesel fuel, and transmit the fuel information to the controller; the fuel water content sensor is installed in the oil-water separator to detect the water content of the diesel fuel and transmit the detected water content information to the controller.

[0036] The controller receives fuel information from the instrument and diesel water content information detected by the fuel water content sensor, compares it with standard petrochemical diesel, calculates the corresponding power loss, and calculates the injection quantity correction coefficient λ1 based on the power loss. The controller sends the injection quantity correction coefficient λ1 to the engine and controls the engine to implement the injection quantity corrected by the correction coefficient λ1 in the injection control. At the same time, the controller collects real-time engine speed drop and load rate, and determines the corrected injection quantity W1 based on the speed drop and load rate for iterative correction.

[0037] As an improvement to the embodiment, the power loss is: (the difference between the heat generated by standard petrochemical diesel per unit volume and the heat generated by diesel per unit volume) / the heat generated by standard petrochemical diesel per unit volume.

[0038] That is, power loss = (Q1-Q2) / Q1, where Q1 = ρ1×V1×q1, Q2 = ρ2×V2×q2;

[0039] In the formula, Q1 is the heat generated by the standard petrochemical diesel, q1 is the calorific value of the standard petrochemical diesel, ρ1 is the density of the standard petrochemical diesel, and V1 is the volume of the standard petrochemical diesel (unit volume is 1L); Q2 is the heat generated by the diesel used, q2 is the calorific value of the diesel used, ρ2 is the density of the diesel used, and V2 is the volume of the diesel used.

[0040] As an improvement to the embodiment, when Q1>Q2, that is, when the combustion performance of the diesel fuel used is lower than that of standard petrochemical diesel fuel, the calculation method of the fuel injection quantity correction coefficient λ1 is λ1=(Q1-Q2) / Q2, 0<λ1;

[0041] When Q1<Q2, that is, when the combustion performance of the used diesel is higher than that of standard petrochemical diesel, the fuel injection quantity correction coefficient λ1 is calculated as λ1=(Q1-Q2) / Q2, and λ1<0.

[0042] In addition, as shown in Figure 1 , the present invention further provides an engine power correction method based on diesel category, which adopts the above-mentioned engine power correction system based on diesel category, and comprises the following steps:

[0043] S1. A driver inputs oil product information of the used diesel in an instrument, including the density and calorific value of the used diesel;

[0044] S2. A controller compares the input diesel density and calorific value with standard petrochemical diesel in combination with the diesel water content information detected by a fuel water-containing sensor in an oil-water separator, so as to obtain the corresponding power loss;

[0045] S3. The controller calculates the fuel injection quantity correction coefficient λ1 according to the power loss;

[0046] S4. The engine applies the fuel injection quantity corrected by the fuel injection quantity correction coefficient λ1 to fuel injection control;

[0047] S5. The controller collects real-time engine speed drop and load rate;

[0048] S6. The controller jointly determines the corrected fuel injection quantity W1 according to the engine speed drop and the load rate to perform iterative correction.

[0049] As an improvement of the embodiment, in step S4, the engine applies the corrected fuel injection quantity to the fuel injection control, and the controller embeds the fuel injection quantity correction coefficient λ1 into the fuel injection control strategy to precisely control the final fuel injection quantity.

[0050] As an improvement of the embodiment, in step S5, the controller collects the real-time engine speed drop and load rate, and the fuel injection quantity corrected and compensated by the fuel injection quantity correction coefficient λ1 is applied to the operation of the engine; at the same time, the controller adds a compensated fuel injection quantity according to the actual engine speed drop value and engine load rate to improve the engine responsiveness.

[0051] The fuel injection quantity compensation method exists in the prior art, and the compensated fuel injection quantity is obtained by looking up calibrated table data in the engine software, as shown in Figure 3 , the table is jointly determined by the engine speed drop value and the engine load rate, and the compensated fuel injection quantity is a specific fuel injection quantity value, which is superimposed on the final calculation result of the total fuel injection quantity.

[0052] Finally, the present invention further provides a construction machine, on which the above-mentioned engine power correction system based on diesel category is installed;

[0053] Regarding the aforementioned bench test data for construction machinery engines, it is evident that at the same engine speed, the engine outputs different power and corresponding torques depending on the load. This torque and power are determined by different fuel injection quantities. Figure 4 As shown;

[0054] Analysis shows that the use of biofuels will inevitably lead to differences in diesel performance. For example, the use of low-calorific-value biodiesel will result in a decrease in engine power due to its reduced calorific value. By increasing the amount of fuel injected to produce a calorific value comparable to that of ordinary petrochemical diesel, the reduced engine power can be compensated.

[0055] The engine power correction system based on diesel fuel of this invention can save energy, eliminate emissions pollution, be clean and environmentally friendly, enhance market competitiveness and product performance, and ensure power performance.

[0056] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

Claims

1. An engine power correction system based on diesel fuel type, characterized in that, comprising: a meter, configured to input oil product information of the diesel in use and transmit the oil product information to a controller; a fuel water content sensor, mounted in an oil-water separator, configured to detect the water content of the diesel and transmit the detected water content information of the diesel to the controller; the controller, configured to receive the oil product information input by the meter and the diesel water content information detected by the fuel water content sensor, compare the same with standard petrochemical diesel, calculate a corresponding power loss, and calculate a fuel injection quantity correction coefficient λ1 according to the power loss, wherein the controller transmits the fuel injection quantity correction coefficient λ1 to an engine, so as to control the engine to apply the fuel injection quantity corrected by the correction coefficient λ1 to fuel injection control; at the same time, the controller collects real-time engine speed drop and load rate, and jointly determines a corrected fuel injection quantity W1 according to the speed drop and the load rate for iterative correction; the power loss is: (difference between heat generated by the standard petrochemical diesel per unit volume and heat generated by the diesel in use per unit volume) / heat generated by the standard petrochemical diesel per unit volume; that is, the power loss=(Q1-Q2) / Q1, where Q1=ρ1×V1×q1, Q2=ρ2×V2×q2; in the formula, Q1 is the heat generated by the standard petrochemical diesel, q1 is the calorific value of the standard petrochemical diesel, ρ1 is the density of the standard petrochemical diesel, and V1 is the volume of the standard petrochemical diesel (the unit volume is 1L); Q2 is the heat generated by the diesel in use, q2 is the calorific value of the diesel in use, ρ2 is the density of the diesel in use, and V2 is the volume of the diesel in use.

2. The engine power correction system based on diesel type according to claim 1, characterized in that, The oil product information includes the density and calorific value of the diesel in use.

3. The engine power correction system based on diesel type according to claim 1, characterized in that, When Q1>Q2, the fuel injection quantity correction coefficient λ1 is calculated as λ1=(Q1-Q2) / Q2, 0<λ1.

4. The engine power correction system based on diesel type according to claim 1, characterized in that, When Q1<Q2, the fuel injection quantity correction coefficient λ1 is calculated as λ1=(Q1-Q2) / Q2, λ1<0.

5. A method for engine power correction based on diesel fuel type, characterized in that, An engine power correction method based on diesel categories, using the engine power correction system based on diesel categories according to any one of claims 1 to 4, comprising the following steps: S1: A driver inputs oil product information of the diesel in use into the meter, including the density and calorific value of the diesel in use; S2: The controller compares the input diesel density and calorific value in combination with the diesel water content information detected by the fuel water content sensor in the oil-water separator with the standard petrochemical diesel, so as to obtain the corresponding power loss; S3: The controller calculates the fuel injection quantity correction coefficient λ1 according to the power loss; S4: The engine applies the fuel injection quantity corrected by the fuel injection quantity correction coefficient λ1 to fuel injection control; S5: The controller collects real-time engine speed drop and load rate; S6: The controller jointly determines the corrected fuel injection quantity W1 according to the engine speed drop and the load rate for iterative correction.

6. The engine power correction method based on diesel type according to claim 5, characterized in that, In step S4, the engine applies the corrected fuel injection quantity to fuel injection control, and the controller embeds the fuel injection quantity correction coefficient λ1 into a fuel injection control strategy to accurately control the final fuel injection quantity.

7. The engine power correction method based on diesel type according to claim 5, characterized in that, In step S5, the controller collects real-time engine speed drop and load rate, and applies the corrected and compensated fuel injection quantity to the engine operation through the fuel injection quantity correction coefficient λ1; at the same time, the controller adds a compensation fuel injection quantity to improve the engine responsiveness based on the actual engine speed drop value and engine load rate.

8. The engine power correction method based on diesel type according to claim 7, characterized in that, The compensated fuel injection quantity is obtained by looking up data in a calibrated table in the engine software. This table is determined by the engine speed drop value and the engine load rate. The compensated fuel injection quantity is the specific fuel injection quantity value, which is added to the final calculation result of the total fuel injection quantity.

9. An engineering machinery, characterized in that, The engineering machinery is equipped with an engine power correction system based on diesel type as described in any one of claims 1-4; or, an engine power correction method based on diesel type as described in any one of claims 5-8 is used.

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