Compatible multi-fuel engine system and control method thereof

Abstract

The invention discloses a compatible multi-fuel engine system and a control method thereof. The compatible multi-fuel engine system comprises an engine, a fuel tank, a fuel adding pipeline, a fuel analyzer and an engine controller. The fuel filling pipeline is used for conveying fuel to a fuel tank; the fuel analyzer is used for sampling fuel from the fuel filling pipeline, analyzing fuel types and sending fuel type analysis results to the engine controller; the engine controller determines an ignition mode of fuel according to the type of the fuel, and performs fuel ignition control on the engine: if the type of the fuel is spark ignition type fuel, the engine controller adopts the ignition mode, and the optimal gas inlet, ignition and fuel injection moments are adjusted; and if the fuel type is compression ignition type fuel, the engine controller adopts a compression ignition mode, and the optimal air inlet and fuel injection time is adjusted. According to the invention, the adaptability of the internal combustion engine automobile to different fuels can be improved, the limitation on the fuel added by a user is reduced, the user anxiety is reduced, and the user experience is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel engines, and in particular relates to a compatible multi-fuel engine system and a control method thereof. Background Art

[0002] With the increasingly stringent carbon emission requirements and the implementation of the carbon neutrality strategy, the task of carbon peak and carbon neutrality for automobile fuel engines is becoming increasingly arduous. In order to meet the needs of carbon peak and carbon neutrality, the use of carbon neutral fuel is one of the feasible routes. There are many types of actual carbon neutral fuels, including common ones such as hydrogen, ammonia, biomethanol, bioethanol, biodiesel, etc. Vehicles driven by engines that burn carbon neutral fuels are truly zero-carbon emission vehicles.

[0003] In real life, different regions provide different types of fuel due to differences in resource endowments. Different fuels have different combustion characteristics, which leads to large differences in ignition characteristics, knock performance, etc. in the engine. As a result, existing engines are often only allowed to use one or a few fuels with similar performance, which limits the convenience of vehicle use. Summary of the invention

[0004] In order to solve the problem that current vehicles equipped with internal combustion engines are not compatible with multiple fuels, the present invention provides a compatible multi-fuel engine system and a control method thereof, which can improve the adaptability of internal combustion engine vehicles to different fuels, reduce restrictions on the fuel added by users, reduce user anxiety, and improve user experience.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] In a first aspect, the present invention provides a compatible multi-fuel engine system, including an engine, a fuel tank, a fuel filling line, a fuel analyzer, and an engine controller;

[0007] The fuel filling pipeline is used to deliver fuel to the fuel tank;

[0008] The fuel analyzer is used to sample fuel from the fuel filling line and analyze the fuel type, and send the fuel type analysis result to the engine controller;

[0009] The engine controller determines the fuel ignition mode according to the fuel type and controls the fuel ignition of the engine.

[0010] Furthermore, the engine is an internal combustion engine, and the fuel undergoes a combustion reaction with oxygen in the air in the engine combustion chamber and is converted into mechanical energy.

[0011] Furthermore, the engine is a car engine.

[0012] Furthermore, a sampling port is provided on the fuel filling pipeline, and the fuel analyzer samples the fuel from the sampling port.

[0013] Furthermore, the engine controller determines the ignition mode of the fuel according to the fuel type. If the fuel type is a spark-ignition fuel, the engine controller adopts the ignition mode and adjusts the optimal intake, ignition and fuel injection timing so that the ignition strategy is suitable for the corresponding fuel; if the fuel type is a compression-ignition fuel, the engine controller adopts the compression-ignition mode and adjusts the optimal intake and fuel injection timing so that the ignition strategy is suitable for the corresponding fuel.

[0014] In a second aspect, the present invention also provides a control method for a compatible multi-fuel engine system, comprising the following steps:

[0015] S1. Fuel filling;

[0016] S2. Fuel sampling;

[0017] S3. Fuel type analysis;

[0018] S4. Determine the ignition mode and generate a corresponding engine ignition control strategy to control the engine ignition.

[0019] Furthermore, in step S2, the fuel analyzer samples the fuel through a sampling port provided on the fuel filling pipeline.

[0020] Furthermore, in step S3, the fuel analyzer determines the type of fuel by analyzing the fuel components.

[0021] Furthermore, the step S4 comprises:

[0022] S41. If the fuel type is ignition fuel, the ignition mode is used to adjust the optimal intake, ignition and fuel injection timing to control the engine ignition;

[0023] S42. If the fuel type is compression ignition fuel, the compression ignition mode is adopted to adjust the optimal intake and fuel injection timing to control the engine ignition.

[0024] The present invention has the following advantages:

[0025] The present invention provides a compatible multi-fuel engine system and a control method thereof. The system can identify the fuel type in advance through fuel composition analysis, and the engine mechanism can be controlled to adjust to a state matching the fuel used through a program preset in the controller, so that the engine works in a mode suitable for fuel combustion, ultimately achieving the purpose of making the vehicle compatible with multiple fuels and being able to be used by users in different regions.

[0026] The present invention can improve the adaptability of internal combustion engine vehicles to different fuels, reduce restrictions on the fuel added by users, reduce user anxiety, and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. 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 the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the composition principle of a compatible multi-fuel engine system according to Embodiment 1 of the present invention;

[0029] Figure 2 This is a flow chart of a control method for a compatible multi-fuel engine system described in Example 2 of the present invention. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly stipulated and limited, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them.

[0033] As used herein, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements that are inherent to such process, method, article, or apparatus.

[0034] Example 1

[0035] This embodiment is a compatible multi-fuel engine system, such as Figure 1 As shown, it includes an engine, a fuel tank, a fuel filling line, a fuel analyzer and an engine controller;

[0036] The fuel filling pipeline is used to deliver fuel to the fuel tank;

[0037] The fuel analyzer is used to sample fuel from the fuel filling line and analyze the fuel type, and send the fuel type analysis result to the engine controller;

[0038] The engine controller determines the fuel ignition mode according to the fuel type and controls the fuel ignition of the engine.

[0039] Furthermore, the engine is an internal combustion engine that can use a variety of fuels. The fuel undergoes a combustion reaction with oxygen in the air in the engine combustion chamber and is converted into mechanical energy.

[0040] The engine is a car engine.

[0041] Furthermore, a sampling port is provided on the fuel filling pipeline, and the fuel analyzer samples the fuel from the sampling port.

[0042] Furthermore, the fuel analyzer determines the type of fuel by analyzing the fuel components.

[0043] Furthermore, the engine controller determines the ignition mode of the fuel according to the fuel type. If the fuel type is a spark-ignition fuel, the engine controller adopts the ignition mode and adjusts the optimal intake, ignition and fuel injection timing so that the ignition strategy is suitable for the corresponding fuel; if the fuel type is a compression-ignition fuel, the engine controller adopts the compression-ignition mode and adjusts the optimal intake and fuel injection timing so that the ignition strategy is suitable for the corresponding fuel.

[0044] Example 2

[0045] This embodiment is a control method for a compatible multi-fuel engine system. Figure 2 As shown, the following steps are included:

[0046] S1. Fuel filling:

[0047] filling the fuel tank with fuel through the fuel filling line;

[0048] S2. Fuel sampling:

[0049] The fuel analyzer takes fuel samples through the sampling port on the fuel filling line;

[0050] S3. Fuel type analysis:

[0051] After the fuel analyzer takes a fuel sample, it analyzes the fuel composition, determines the type of fuel and sends the analysis results to the engine controller;

[0052] S4. Determine the ignition mode and generate the corresponding engine ignition control strategy to control the engine ignition:

[0053] S41. If the fuel type is ignition fuel, the ignition mode is used to adjust the optimal intake, ignition and fuel injection timing to control the engine ignition;

[0054] S42. If the fuel type is compression ignition fuel, the compression ignition mode is adopted to adjust the optimal intake and fuel injection timing to control the engine ignition.

[0055] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the protection scope of the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention. These simple variations all belong to the protection scope of the present invention.

[0056] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0057] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compatible multi-fuel engine system, characterized in that: Includes engine, fuel tank, fuel filling line, fuel analyzer and engine controller; The fuel filling pipeline is used to deliver fuel to the fuel tank; The fuel analyzer is used to sample fuel from the fuel filling line and analyze the fuel type, and send the fuel type analysis result to the engine controller; The engine controller determines the fuel ignition mode according to the fuel type and controls the fuel ignition of the engine.

2. A compatible multi-fuel engine system as claimed in claim 1, characterized in that: The engine is an internal combustion engine, and the fuel undergoes a combustion reaction with oxygen in the air in the engine combustion chamber and is converted into mechanical energy.

3. A compatible multi-fuel engine system as claimed in claim 1, characterized in that: The engine is a car engine.

4. A compatible multi-fuel engine system as claimed in claim 1, characterized in that: The fuel filling pipeline is provided with a sampling port, and the fuel analyzer samples the fuel from the sampling port.

5. A compatible multi-fuel engine system as claimed in claim 1, characterized in that: The engine controller determines the ignition mode of the fuel according to the fuel type. If the fuel type is a spark-ignition fuel, the engine controller adopts the ignition mode and adjusts the optimal intake, ignition and fuel injection timing so that the ignition strategy is suitable for the corresponding fuel; if the fuel type is a compression-ignition fuel, the engine controller adopts the compression-ignition mode and adjusts the optimal intake and fuel injection timing so that the ignition strategy is suitable for the corresponding fuel.

6. A control method for a compatible multi-fuel engine system as claimed in claim 1, characterized in that: The following steps are involved: S1. Fuel filling; S2. Fuel sampling; S3. Fuel type analysis; S4. Determine the ignition mode and generate a corresponding engine ignition control strategy to control the engine ignition.

7. A control method for a compatible multi-fuel engine system as claimed in claim 6, characterized in that: In step S2, the fuel analyzer samples the fuel through a sampling port provided on the fuel filling pipeline.

8. A control method for a compatible multi-fuel engine system as claimed in claim 6, characterized in that: In step S3, the fuel analyzer determines the type of fuel by analyzing the fuel components.

9. A control method for a compatible multi-fuel engine system as claimed in claim 6, characterized in that: The step S4 comprises: S41. If the fuel type is ignition fuel, the ignition mode is used to adjust the optimal intake, ignition and fuel injection timing to control the engine ignition; S42. If the fuel type is compression ignition fuel, the compression ignition mode is adopted to adjust the optimal intake and fuel injection timing to control the engine ignition.

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