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Injection control method and control device for methanol engine and vehicle

A control method and engine technology, applied in the fields of control devices, vehicles, and injection control methods, can solve the problems of high power requirements of heavy-duty methanol engines, large latent heat value of methanol fuel vaporization, and short spray evaporation time, so as to solve the problem of fuel vaporization mist. The effect of shortening the mixing time, reducing the phenomenon of wet wall in the cylinder, and improving the mixing effect

Active Publication Date: 2022-02-25
ZHEJIANG GEELY HLDG GRP CO LTD +1
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Problems solved by technology

[0004]However, the latent heat of vaporization of methanol fuel is large, and heavy-duty methanol requires high power performance, large fuel injection quantity, and generally long injection pulse width (measured by crankshaft angle) , using a closed-valve injection strategy that defines the cut-off time of fuel injection, all operating conditions have short spray evaporation time and severe wet walls in the cylinder, which are unfavorable to cylinder liner wear and combustion

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  • Injection control method and control device for methanol engine and vehicle
  • Injection control method and control device for methanol engine and vehicle
  • Injection control method and control device for methanol engine and vehicle

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Embodiment Construction

[0038] figure 1 is a flowchart of an injection control method according to an embodiment of the present invention. figure 2 is an injection timing chart of an injection control method according to an embodiment of the present invention. Such as figure 1 As shown, in one embodiment, the injection control method for methanol engine of the present invention comprises:

[0039] Step S100, calculating the fuel injection duration corresponding to each load condition.

[0040] The load working conditions refer to working conditions corresponding to different loads of the methanol engine, such as working at full load, working at 50% load, and so on.

[0041] Specifically, for each load condition, the corresponding air-fuel ratio can be calculated through the engine load value and the engine speed, and then the single-cylinder fuel injection quantity of each intake cycle of the engine can be calculated according to the air-fuel ratio, and then according to The crank angle can be c...

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Abstract

The invention provides an injection control method and control device for a methanol engine and a vehicle, and belongs to the technical field of methanol engine control. The injection control method comprises the steps that: the oil injection duration corresponding to each load working condition is calculated; a target oil injection starting moment is determined according to the maximum value in each oil injection duration and engine performance parameters; and an oil injector is controlled to inject oil according to the target oil injection starting time and the target oil injection duration corresponding to the current load working condition. The invention further provides a control unit for executing the injection control method and a vehicle comprising the control unit. According to the injection control method and control device and the vehicle, the adverse effects of short spray evaporation time and serious wall wetting in the cylinder on abrasion and combustion of a cylinder sleeve can be improved, the calculation process is simplified, and the calculation time is saved.

Description

technical field [0001] The invention belongs to the technical field of methanol engine control, and in particular relates to an injection control method, a control device and a vehicle for a methanol engine. Background technique [0002] Methanol fuel is currently known as clean energy, and heavy-duty pure methanol fuel (M100) engines have the advantages of high efficiency, energy saving, and environmental protection. Methanol fuel is liquid at room temperature, has a low cetane number, high auto-ignition temperature, and is difficult to compression ignite. Similar to the gasoline engine, the M100 engine adopts the spark plug ignition method, and its fuel injection control method is the same as that of the gasoline engine. In order to form a homogeneous combustible mixture (fuel and air, etc.) Spray for good spray evaporation. [0003] At present, spark-ignited gasoline engines and pure methanol fuel engines basically adopt the sequential injection of electronically contro...

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Application Information

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IPC IPC(8): F02D41/30
CPCF02D41/30Y02T10/30
Inventor 蒋海勇苏茂辉卢瑞军沈玉芳
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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