Method for obtaining fuel injection advance angle of diesel engine with protection and delay compensation
A fuel injection advance angle, diesel engine technology, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problems of low combustion efficiency, engine fragility, and increased fuel injection consumption of the engine, so as to reduce the emission of pollutants, The effect of improving fuel injection accuracy and improving combustion efficiency
Active Publication Date: 2022-07-26
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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Problems solved by technology
[0004] In order to solve the problems that the existing methods cannot meet the control requirements of the fuel injection advance angle under the full working conditions of the engine and abnormal conditions, resulting in increased fuel injection consumption of the engine, low combustion efficiency, relatively high emissions, and engine damage, etc., the present invention provides A method for obtaining fuel injection advance angle of diesel engine with protection and delay compensation
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[0046] like figure 1 As shown, the present invention provides a method for obtaining fuel injection advance angle of a diesel engine with protection and delay compensation, and the specific implementation steps are as follows:
[0047] Step 1: Set up the lookup table
[0048] Set up lookup table MAP1, lookup table MAP2, lookup table MAP3, lookup table MAP4 and lookup table MAP5 according to the engine model and injector model, and import them into the engine controller;
[0049] Lookup table MAP1 represents the engine speed N speed and total fuel injection Fuel total and the initial injection advance angle SOI ref the relationship between the three;
[0050] Look-up table MAP2 represents the engine speed N speed and total fuel injection Fuel totaland the maximum output advance angle SOI max the relationship between the three;
[0051] The look-up table MAP3 indicates that the engine speed N is included speed and total fuel injection Fuel total and the minimum output ...
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The invention discloses a method for obtaining fuel injection advance angle of a diesel engine with protection and delay compensation. The method meets the control requirements of the fuel injection advance angle under all engine operating conditions and abnormal states, and effectively improves the diesel engine's fuel injection advance angle. Combustion efficiency and fuel economy improve power performance and reduce pollutant emissions. The main implementation steps include: 1. Setting the lookup table; 2. Reading the current engine operating parameters; 3. Looking up the table to obtain the initial fuel injection advance angle; 4. Calculating the compensation fuel injection advance angle; 5. Limiting the output range of the fuel injection advance angle ; 6. Obtain the expected fuel injection advance angle; 7. Calculate the fuel injector delay time; 8. Calculate the fuel injector opening delay angle; 9. Calculate the actual fuel injection advance angle.
Description
technical field [0001] The invention belongs to the field of power control of an electronically controlled diesel engine, in particular to a method for obtaining a fuel injection advance angle of a diesel engine with protection and delay compensation. Background technique [0002] Diesel engines have the advantages of large output torque and good economic performance, and are more and more widely used. However, environmental pollution caused by diesel engine emissions has attracted increasing attention. There are many factors affecting diesel engine emissions, and the influence of fuel injection advance angle on diesel engine economy, power and emission performance is more significant than other parameters. If the fuel injection advance angle is too early or too late, it will directly affect the degree of complete combustion of the fuel, which in turn affects the output power of the diesel engine; inappropriate fuel injection advance angle will increase the fuel consumption ...
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IPC IPC(8): F02D41/38F02D41/40
CPCF02D41/38F02D41/401F02D2200/101
Inventor 于正同赵刚毛宁王骥超王雅荟时培燕
Owner XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA