A method for controlling fuel injection amount of a methanol engine, an electronic control unit, and a vehicle
A fuel injection quantity, methanol engine technology, applied in the direction of fuel injection control, engine control, machine/engine, etc., can solve the problems affecting the reliability of the engine, and achieve the effect of avoiding the deterioration of emission indicators, avoiding power differences, and eliminating individual differences
Active Publication Date: 2021-08-13
ZHEJIANG GEELY HLDG GRP CO LTD +1
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[0003] However, in the electronically controlled injection system, the injection quantity of the fuel injector is controlled by the electronic control unit (ECU, Electronic Control Unit), and the injection quantity correction coefficient suitable for methanol fuel is not used as the control parameter adopted by the electronic control unit. At the same time, Considering that there are differences between individuals of fuel injectors, it will affect the reliability of the engine and limit the best performance of the engine to a certain extent
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0024] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features. Also, the terms "first", "second", etc. are used to distinguish similar items and not necessarily to des...
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The invention provides a method for controlling fuel injection amount of a methanol engine, an electronic control unit and a vehicle. The control method includes: determining the target injection quantity ε of the fuel injector according to the received input signal; using the following formula to calculate the current injection pressure difference X of the fuel injector i The injection pulse width of the fuel injector under α j : According to the calculated α j , to control the injection pulse width of the fuel injector; f(α j ) by fitting the injection pulse width α of multiple fuel injectors of the same type j The relationship with the corresponding injection pulse width correction coefficient is generated; g(X i ) by fitting the injection pressure difference X of multiple fuel injectors of the same type i A relationship with the corresponding injection pressure differential correction factor is generated. It improves the control accuracy of the injection quantity, reduces the possibility of cylinder knocking, and is beneficial to the best performance of the methanol engine.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a method for controlling fuel injection quantity of a methanol engine, an electronic control unit and a vehicle. Background technique [0002] With the rapid development of science and technology, automobiles have become an indispensable means of transportation in people's lives. With the increasing scarcity of petroleum resources and stricter vehicle emission regulations, the fuel requirements for vehicles are also becoming stricter. Methanol can be produced from coal and natural gas, its combustion speed is fast, it is smokeless, flameless, NO x Emissions are low, and methanol is easily transported relative to gaseous fuels such as natural gas. Therefore, considering the economy of use and reducing exhaust emissions, methanol is widely used as a fuel for vehicles as an alternative energy source. [0003] However, in the electronic control injection system, the injection ...
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IPC IPC(8): F02D41/30F02D29/02
Inventor李书福张利焘金先扬陶劲峰缪英超
OwnerZHEJIANG GEELY HLDG GRP CO LTD