Hybrid control method and system for vehicle natural gas engine and electronic equipment
By adjusting the load status and parameters of the natural gas engine when the motor battery power is lower than the preset value, and coordinating the motor output torque, the problems of complex working conditions of the natural gas engine and difficult to control the gas consumption are solved, and better gas consumption and power output are achieved .
Patent Information
- Application Number
- CN202411344526.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2024-12-24
AI Technical Summary
The working conditions of natural gas engines are complex during operation, and the gas consumption is difficult to control. Especially under small load conditions, the throttle opening leads to large throttle losses and insufficient power.
By controlling the natural gas engine to charge at different load states when the motor battery power is lower than the preset value, including low-speed medium load and medium-speed large load, adjusting the throttle opening and EGR rate, engine ignition angle, and motor and engine coordination Output torque to optimize gas consumption.
Reduce pump gas loss, optimize gas consumption, and improve power output, solving the problems of complex working conditions and difficult to control gas consumption.
Smart Images
Figure CN119176121A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of natural gas engines, and in particular to a hybrid control method, system and electronic equipment for a vehicle natural gas engine. Background Art
[0002] During the operation of the gas engine, the working conditions are complex and the gas consumption is difficult to control. At the same time, the gas engine uses a throttle to control the engine output. Under low load conditions, the throttle opening is small, the throttling loss is large, and the gas consumption will also be affected.
[0003] Since most gas engines use a mixer to mix fuel gas and fresh air, it takes a certain amount of time for the fuel gas to enter the cylinder, which can easily cause insufficient power during rapid acceleration. Summary of the invention
[0004] The present application provides a hybrid control method for a vehicle natural gas engine to at least solve the problems existing in the related art.
[0005] According to one aspect of an embodiment of the present application, a hybrid control method for a vehicle natural gas engine is provided, wherein the vehicle includes a natural gas engine and a motor, and the hybrid control method includes: when the battery power of the motor is lower than a first preset value, controlling the natural gas engine to charge the battery and controlling the natural gas engine to be in a low-speed and medium-load state; when the battery power of the motor is lower than a second preset value, controlling the natural gas engine to charge the battery and controlling the natural gas engine to be in a medium-speed and high-load state; the first preset value is greater than the second preset value.
[0006] As an optional implementation, when the battery power of the motor is lower than a first preset value, controlling the natural gas engine to charge the battery and controlling the natural gas engine to be in a low-speed and medium-load state includes: increasing the throttle opening, increasing the target pressure ratio before and after the throttle, and reducing the throttle pressure loss before and after the throttle.
[0007] As an optional implementation, when the battery power of the motor is lower than a second preset value, controlling the natural gas engine to be in a medium-speed and high-load state includes: controlling the engine to generate electricity within a fuel consumption economy zone; increasing the engine EGR rate and increasing the engine ignition angle output.
[0008] As an optional implementation, it also includes: when the vehicle has a short-term high load demand, controlling the natural gas engine and the motor to output torque simultaneously.
[0009] As an optional implementation, when the vehicle has a short-term high load demand, controlling the natural gas engine and the motor to output torque simultaneously includes: the engine adopts a small ignition angle and a small EGR rate; controlling the motor to output supplementary torque; and reducing the supplementary torque according to the increase in the engine output torque.
[0010] As an optional implementation, it also includes: during the starting process, controlling the motor to start and controlling the engine to be in an idle standby state.
[0011] As an optional implementation, during the starting process, controlling the motor to start and controlling the engine to be in an idle standby state includes: determining whether the vehicle speed is greater than a preset speed limit; if the vehicle speed is greater than the preset speed limit, reducing the intervention of the ignition angle on the torque.
[0012] According to another aspect of an embodiment of the present application, a hybrid control system for a vehicle natural gas engine is provided, comprising: a first power judgment module, used to control the natural gas engine to charge the battery and control the natural gas engine to be in a low-speed and medium-load state when the battery power of the motor is lower than a first preset value; a second power judgment module, used to control the natural gas engine to charge the battery and control the natural gas engine to be in a medium-speed and high-load state when the battery power of the motor is lower than a second preset value; the first preset value is greater than the second preset value.
[0013] According to another aspect of the embodiment of the present application, there is provided an electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus, and the memory is used to store a computer program; and the processor is used to execute the steps of the hybrid control method for the vehicle natural gas engine by running the computer program stored in the memory.
[0014] According to another aspect of the embodiment of the present application, a computer-readable storage medium is provided, characterized in that a computer program is stored in the storage medium, wherein the computer program is configured to execute the steps of the hybrid control method of the vehicle natural gas engine when running.
[0015] In an embodiment of the present application, a hybrid control method for a vehicle natural gas engine is provided, wherein the vehicle includes a natural gas engine and a motor, and the hybrid control method includes: when the battery power of the motor is lower than a first preset value, controlling the natural gas engine to charge the battery and controlling the natural gas engine to be in a low-speed medium-load state; when the battery power of the motor is lower than a second preset value, controlling the natural gas engine to charge the battery and controlling the natural gas engine to be in a medium-speed high-load state; the first preset value is greater than the second preset value. When the battery power of the motor is lower than the first preset value, it is necessary to start the engine to charge the battery, and then control the engine to be in a steady-state condition of low speed and medium load. When the battery power of the motor is lower than the second preset value, it is necessary to charge the engine with a greater load; or the motor torque cannot meet the driving demand, and the engine needs to provide power in a steady-state condition. Pumping gas loss is reduced, gas consumption is optimized, and the problem of complex working conditions and difficult control of gas consumption during the operation of the gas engine is solved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0018] Figure 1 It is a flow chart of an optional hybrid control method for a vehicle natural gas engine provided according to an embodiment of the present application. DETAILED DESCRIPTION
[0019] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.
[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0021] like Figure 1 As shown, in order to solve the above technical problems, an embodiment of the present application provides a hybrid control method of a natural gas engine of a vehicle, wherein the vehicle includes a natural gas engine and a motor, and the hybrid control method includes:
[0022] S1: when the battery power of the motor is lower than a first preset value, controlling the natural gas engine to charge the battery and controlling the natural gas engine to be in a low speed and medium load state;
[0023] S2: when the battery power of the motor is lower than a second preset value, controlling the natural gas engine to charge the battery and controlling the natural gas engine to be in a medium speed and high load state;
[0024] The first preset value is greater than the second preset value.
[0025] Specifically, when the battery power of the motor is lower than the first preset value, the engine needs to be started to charge the battery, and the engine is controlled to be in a steady-state condition of low speed and medium load. When the battery power of the motor is lower than the second preset value, the engine needs to be charged at a higher load; or the motor torque cannot meet the driving needs, and the engine needs to provide power in a steady-state condition. Reducing pump air loss and optimizing gas consumption solves the problem of complex working conditions and difficult to control gas consumption during the operation of gas engines.
[0026] As an optional implementation, when the battery power of the motor is lower than a first preset value, controlling the natural gas engine to charge the battery and controlling the natural gas engine to be in a low-speed and medium-load state includes: increasing the throttle opening, increasing the target pressure ratio before and after the throttle, and reducing the throttle pressure loss before and after the throttle.
[0027] Specifically, increasing the throttle opening, increasing the target pressure ratio before and after the throttle, and reducing the throttle pressure loss before and after the throttle can reduce pumping loss and reduce gas consumption; at the same time, the engine intake pressure is controlled by the supercharger, and the manifold pressure can also be controlled by adjusting the supercharger bleed valve. Moreover, for example, the target pressure ratio can be obtained by calibration, and the throttle loss is correspondingly reduced when the throttle opening is increased.
[0028] As an optional implementation, when the battery power of the motor is lower than a second preset value, controlling the natural gas engine to be in a medium-speed and high-load state includes: controlling the engine to generate electricity within a fuel consumption economy zone; increasing the engine EGR rate and increasing the engine ignition angle output.
[0029] Specifically, when the battery power of the motor is lower than the second preset value, it can be considered that the engine needs to be charged at a greater load; or the motor torque cannot meet the driving needs, and the engine needs to provide power in a steady-state condition. On the premise of meeting the engine power demand output, the engine can be controlled to operate under medium speed and high load conditions, and the engine can be controlled to generate electricity in the fuel consumption economy zone; the engine's EGR rate is gradually increased, the engine ignition angle output is increased, the engine efficiency is improved, and the gas consumption is reduced. Among them, illustratively, the medium speed and high load state can refer to a state with a speed of 1100r / min to 1500r / min and a load rate of 80% to 100%.
[0030] As an optional implementation, it also includes: when the vehicle has a short-term high load demand, controlling the natural gas engine and the motor to output torque simultaneously.
[0031] As an optional implementation, when the vehicle has a short-term high load demand, controlling the natural gas engine and the motor to output torque simultaneously includes: the engine adopts a small ignition angle and a small EGR rate; controlling the motor to output supplementary torque; and reducing the supplementary torque according to the increase in the engine output torque.
[0032] Specifically, when the vehicle has a short-term high load demand, the engine and the motor need to output torque at the same time. The engine adopts a small ignition angle and a small EGR rate to improve responsiveness. At the same time, due to the hysteresis of the natural gas engine response, the motor is used to make up for the torque missing from the engine according to the required torque obtained from the pedal torque, that is, the supplementary torque is output; as the engine torque increases, the supplementary torque issued by the motor is gradually reduced.
[0033] As an optional implementation, it also includes: during the starting process, controlling the motor to start and controlling the engine to be in an idle standby state.
[0034] As an optional implementation, during the starting process, controlling the motor to start and controlling the engine to be in an idle standby state includes: determining whether the vehicle speed is greater than a preset speed limit; if the vehicle speed is greater than the preset speed limit, reducing the intervention of the ignition angle on the torque.
[0035] By using the hybrid system charging conditions and the motor to provide power, the engine torque can be distributed, the engine can run in the economic fuel consumption area, improve engine efficiency, and reduce gas consumption. At the same time, under transient conditions, the participation of the motor can make up for the general slow response of natural gas engines and improve power.
[0036] According to another aspect of an embodiment of the present application, a hybrid control system for a vehicle natural gas engine is provided, comprising: a first power judgment module, used to control the natural gas engine to charge the battery and control the natural gas engine to be in a low-speed and medium-load state when the battery power of the motor is lower than a first preset value; a second power judgment module, used to control the natural gas engine to charge the battery and control the natural gas engine to be in a medium-speed and high-load state when the battery power of the motor is lower than a second preset value; the first preset value is greater than the second preset value.
[0037] According to another aspect of the embodiment of the present application, there is provided an electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus, and the memory is used to store a computer program; and the processor is used to execute the steps of the hybrid control method for the vehicle natural gas engine by running the computer program stored in the memory.
[0038] According to another aspect of the embodiment of the present application, a computer-readable storage medium is provided, characterized in that a computer program is stored in the storage medium, wherein the computer program is configured to execute the steps of the hybrid control method of the vehicle natural gas engine when running.
[0039] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.
[0040] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling one or more electronic devices (such as personal computers, servers, or network devices) to perform all or part of the steps of the methods described in the various embodiments of the present application.
[0041] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.
[0042] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.
[0043] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in this embodiment.
[0044] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
[0045] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.
[0046] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A hybrid control method for a vehicle natural gas engine, characterized in that: The vehicle includes a natural gas engine and a motor, and the hybrid control method includes: When the battery power of the motor is lower than a first preset value, the natural gas engine is controlled to charge the battery and the natural gas engine is controlled to be in a low speed and medium load state; When the battery power of the motor is lower than a second preset value, the natural gas engine is controlled to charge the battery and the natural gas engine is controlled to be in a medium speed and high load state; The first preset value is greater than the second preset value.
2. The hybrid control method of a vehicle natural gas engine according to claim 1, characterized in that: When the battery power of the motor is lower than a first preset value, controlling the natural gas engine to charge the battery and controlling the natural gas engine to be in a low speed and medium load state includes: Increase the throttle opening, improve the target pressure ratio before and after the throttle, and reduce the throttling pressure loss before and after the throttle.
3. The hybrid control method of a vehicle natural gas engine according to claim 1, characterized in that: When the battery power of the motor is lower than a second preset value, controlling the natural gas engine to be in a medium speed and high load state includes: Control the engine to generate electricity within the fuel consumption economic zone; Increase the engine EGR rate and increase the engine ignition angle output.
4. The hybrid control method of a vehicle natural gas engine according to claim 1, characterized in that: Also includes: When the vehicle has a short-term high load demand, the natural gas engine and the motor are controlled to output torque simultaneously.
5. The hybrid control method of a vehicle natural gas engine as claimed in claim 4, characterized in that: When the vehicle has a short-term high load demand, controlling the natural gas engine and the motor to output torque simultaneously includes: The engine uses a small ignition angle and a small EGR rate; Control the motor to output supplementary torque; The supplemental torque is reduced in accordance with an increase in the engine output torque.
6. The hybrid control method of a vehicle natural gas engine as claimed in claim 1, characterized in that: Also includes: During the starting process, the control motor starts and the engine is placed in an idle standby state.
7. The hybrid control method of a vehicle natural gas engine as claimed in claim 6, characterized in that: During the starting process, controlling the motor to start and controlling the engine to be in an idle standby state includes: Determine whether the vehicle speed is greater than a preset speed limit; If the vehicle speed is greater than the preset vehicle speed limit, the intervention of the ignition angle on the torque is reduced.
8. A hybrid control system for a vehicle natural gas engine, characterized in that: include: A first power judgment module, used for controlling the natural gas engine to charge the battery and controlling the natural gas engine to be in a low speed and medium load state when the battery power of the motor is lower than a first preset value; The second power judgment module is used to control the natural gas engine to charge the battery and control the natural gas engine to be in a medium speed and high load state when the battery power of the motor is lower than a second preset value; the first preset value is greater than the second preset value.
9. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein: The processor, the communication interface and the memory communicate with each other via the communication bus, wherein: The memory is used to store computer programs; The processor is used to execute the steps of the hybrid control method for a vehicle natural gas engine according to any one of claims 1 to 7 by running the computer program stored in the memory.
10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program is configured to execute the steps of the hybrid control method for a vehicle natural gas engine according to any one of claims 1 to 7 when running.