Range extender vehicle engine control methods, devices, equipment and storage media

Abstract

This invention discloses a method, apparatus, device, and storage medium for controlling the engine of a range-extended vehicle, comprising: acquiring the voltage value of a power battery and the gas pressure value of a gas cylinder; if the voltage value is less than a minimum voltage value, then inflating the gas cylinder according to a target inflation pressure value, wherein the target inflation pressure value is greater than the minimum inflation pressure value required to trigger the engine to inflate the gas cylinder; if the gas pressure value is less than the minimum inflation pressure value, then charging the power battery according to a target charging voltage value, wherein the target charging voltage value is greater than the minimum charging voltage value required to trigger the engine to charge the power battery. This invention utilizes the overlapping operation of power battery charging and gas cylinder inflation, raising the lower limit of the inflation pressure during power generation and raising the lower limit of the charging voltage during inflation, allowing charging and inflation to occur simultaneously, reducing the number of engine starts and lowering vehicle fuel consumption.

Description

Technical Field

[0001] This invention relates to the field of engine control technology, and in particular to a method, device, equipment and storage medium for controlling an engine in a range-extended vehicle. Background Technology

[0002] The engine in a range extender vehicle is mainly used for generating electricity. When the battery has a sufficient charge, the engine will not run. When the battery has a low charge, the engine will start to charge the battery and will shut off when the battery reaches the set charge level. Insufficient compressed air in the gas cylinder will also trigger the engine to start to charge the gas, resulting in frequent engine starts and high fuel consumption. Summary of the Invention

[0003] The main objective of this invention is to provide a method, device, equipment, and storage medium for controlling the engine of a range-extended vehicle, aiming to solve the technical problem of high fuel consumption caused by frequent engine starts in the prior art.

[0004] To achieve the above objectives, the present invention provides a method for controlling the engine of a range-extended vehicle, the method comprising the following steps:

[0005] Obtain the voltage value of the power battery and the gas pressure value of the gas cylinder;

[0006] If the voltage value is less than the minimum voltage value, the gas cylinder is inflated according to the target inflation pressure value, which is greater than the minimum inflation pressure value that triggers the engine to inflate the gas cylinder.

[0007] If the air pressure value is less than the minimum air pressure value, the power battery is charged according to the target charging voltage value, which is greater than the minimum voltage value that triggers the engine to charge the power battery.

[0008] Optionally, the step of filling the gas cylinder according to the target filling pressure value if the voltage value is less than the minimum voltage value includes:

[0009] If the voltage value is less than the minimum voltage value, the engine is controlled to start to charge the power battery;

[0010] The pressure increase value of the gas cylinder is determined based on the current voltage value of the power battery during the charging process and the current gas pressure value of the gas cylinder.

[0011] The target air pressure value is determined based on the air pressure increase value and the minimum air pressure value, and the air cylinder is filled with air according to the target air pressure value.

[0012] Optionally, determining the pressure increase value of the gas cylinder based on the current voltage value during the charging process of the power battery and the current gas pressure value of the gas cylinder includes:

[0013] The first estimated charging time is determined based on the current voltage value and the target voltage value during the charging process of the power battery;

[0014] The first estimated inflation time is determined based on the current and target pressure values ​​of the gas cylinder.

[0015] The pressure increase value of the gas cylinder is determined based on the first estimated charging time and the first estimated inflation time.

[0016] Optionally, determining the pressure increase value of the gas cylinder based on the first estimated charging time and the first estimated filling time includes:

[0017] If the first estimated charging time is greater than the first estimated inflation time, then during the process of controlling the engine to charge the power battery, the first estimated charging time and the first estimated inflation time are updated.

[0018] If the updated first estimated charging time is less than or equal to the updated first estimated inflation time, then the pressure difference between the minimum pressure value and the pressure value corresponding to the updated first estimated inflation time shall be used as the pressure increase value of the gas cylinder.

[0019] Optionally, determining the pressure increase value of the gas cylinder based on the first estimated charging time and the first estimated filling time includes:

[0020] If the first estimated charging time is less than or equal to the first estimated inflation time, then the pressure difference between the current pressure value and the minimum pressure value is taken as the pressure increase value of the gas cylinder.

[0021] Optionally, the step of charging the power battery according to the target charging voltage value if the air pressure value is less than the minimum air pressure value includes:

[0022] If the air pressure value is less than the minimum air pressure value, the engine is started to output mechanical energy to the air compressor to fill the air cylinder;

[0023] The voltage boost value of the power battery is determined based on the current gas pressure value during the gas cylinder filling process and the current voltage value of the power battery.

[0024] The target voltage value is determined based on the voltage boost value and the minimum voltage value, and the power battery is charged according to the target voltage value.

[0025] Optionally, determining the voltage boost value of the power battery based on the current gas pressure value during the gas cylinder filling process and the current voltage value of the power battery includes:

[0026] The second estimated inflation time is determined based on the current pressure value and the target pressure value during the inflation process of the gas cylinder;

[0027] The second estimated charging time is determined based on the current voltage value and the target voltage value of the power battery;

[0028] The voltage boost value of the power battery is determined based on the second estimated inflation time and the second estimated charging time.

[0029] Furthermore, to achieve the above objectives, the present invention also proposes a range-extender vehicle engine control device, the device comprising:

[0030] The acquisition module is used to acquire the voltage value of the power battery and the gas pressure value of the gas cylinder;

[0031] An inflation module is used to inflate the gas cylinder according to a target inflation pressure value if the voltage value is less than the minimum voltage value, wherein the target inflation pressure value is greater than the minimum pressure value that triggers the engine to inflate the gas cylinder.

[0032] A charging module is used to charge the power battery according to a target charging voltage value if the air pressure value is less than the minimum air pressure value, wherein the target charging voltage value is greater than the minimum voltage value that triggers the engine to charge the power battery.

[0033] Furthermore, to achieve the above objectives, the present invention also proposes a range-extended vehicle engine control device, the device comprising: a memory, a processor, and a range-extended vehicle engine control program stored in the memory and executable on the processor, the range-extended vehicle engine control program being configured to implement the steps of the range-extended vehicle engine control method described above.

[0034] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a range-extended vehicle engine control program, which, when executed by a processor, implements the steps of the range-extended vehicle engine control method described above.

[0035] This invention proposes a method for controlling the engine of a range-extended vehicle, comprising: acquiring the voltage value of a power battery and the gas pressure value of a gas cylinder; if the voltage value is less than a minimum voltage value, then inflating the gas cylinder according to a target inflation pressure value, wherein the target inflation pressure value is greater than the minimum inflation pressure value required to trigger the engine to inflate the gas cylinder; if the gas pressure value is less than the minimum inflation pressure value, then charging the power battery according to a target charging voltage value, wherein the target charging voltage value is greater than the minimum charging voltage value required to trigger the engine to charge the power battery. This invention utilizes the overlapping operating conditions of power battery charging and gas cylinder inflation, raising the lower limit of the inflation pressure during power generation and raising the lower limit of the charging voltage during inflation, allowing charging and inflation to occur simultaneously, reducing the number of engine starts and lowering vehicle fuel consumption. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the range-extended vehicle engine control device in the hardware operating environment involved in the embodiments of the present invention;

[0037] Figure 2 This is a flowchart illustrating an embodiment of the range-extended vehicle engine control method of the present invention;

[0038] Figure 3 This is a flowchart illustrating another embodiment of the range-extended vehicle engine control method of the present invention;

[0039] Figure 4 This is a flowchart illustrating another embodiment of the range-extended vehicle engine control method of the present invention;

[0040] Figure 5 This is a structural block diagram of an embodiment of the range-extended vehicle engine control device of the present invention.

[0041] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0043] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of the range-extended vehicle engine control device in the hardware operating environment involved in the embodiments of the present invention.

[0044] like Figure 1 As shown, the range-extended vehicle engine control device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0045] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the engine control equipment of the range extender vehicle, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0046] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a range-extended vehicle engine control program.

[0047] exist Figure 1 In the range-extended vehicle engine control device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 can be set in the range-extended vehicle engine control device. The range-extended vehicle engine control device calls the range-extended vehicle engine control program stored in the memory 1005 through the processor 1001 and executes the range-extended vehicle engine control method provided in the embodiment of the present invention.

[0048] This invention provides a method for controlling the engine of a range-extended vehicle, referring to... Figure 2 , Figure 2 This is a flowchart illustrating an embodiment of the range-extended vehicle engine control method of the present invention.

[0049] In this embodiment, the range extender vehicle engine control method includes the following steps:

[0050] Step S1: Obtain the voltage value of the power battery and the gas pressure value of the gas cylinder.

[0051] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, or an electronic device, range-extended vehicle engine control device, range-extended vehicle engine controller, etc., capable of realizing the above functions. The following uses a range-extended vehicle engine controller (hereinafter referred to as the controller) as an example to illustrate this embodiment and the following embodiments.

[0052] Step S2: If the voltage value is less than the minimum voltage value, then inflate the gas cylinder according to the target inflation pressure value.

[0053] The target inflation pressure is greater than the minimum pressure required to trigger the engine to inflate the gas cylinder.

[0054] It is understandable that the minimum voltage value can be a preset voltage value used to trigger the engine to start and charge the power battery; the minimum air pressure value can be a preset air pressure value used to trigger the engine to start and fill the air cylinder; the target filling air pressure value can be an air pressure value obtained by increasing the minimum air pressure value; the minimum air pressure value can be obtained through calibration.

[0055] It should be noted that if the voltage value is less than the minimum voltage value, the engine is started to charge the power battery. At this time, if the gas pressure value of the gas cylinder is greater than the minimum gas pressure value, the gas cylinder will not be filled. In this embodiment, when the voltage value of the power battery is less than the minimum voltage value and the engine is started to charge the power battery, the gas cylinder is filled according to the target gas pressure value which is greater than the minimum gas pressure value. This can trigger the engine to charge the power battery and the gas cylinder at the same time, so that the filling condition and the charging condition coincide, thereby reducing the number of engine starts and reducing the engine fuel consumption.

[0056] As one implementation method, if the voltage of the power battery is lower than the minimum voltage, the engine is started to charge the power battery and the minimum air pressure of the gas cylinder is increased to obtain the target air pressure. If the current air pressure of the gas cylinder is lower than the increased target air pressure, the engine is controlled to output mechanical energy to the air compressor, which then fills the gas cylinder with air. This allows the power battery to be charged and the gas cylinder to be filled simultaneously, reducing the number of engine starts.

[0057] Step S3: If the air pressure value is less than the minimum air pressure value, then charge the power battery according to the target charging voltage value.

[0058] The target charging voltage value is greater than the minimum voltage value required to trigger the engine to charge the power battery.

[0059] It should be noted that currently, if the air pressure is lower than the minimum air pressure, the engine is started to fill the gas cylinder. At this time, if the voltage is higher than the minimum voltage, the power battery will not be charged. In this embodiment, when the air pressure is lower than the minimum air pressure and the engine is started to fill the gas cylinder, the power battery is charged according to the target voltage value which is higher than the minimum voltage. This can trigger the engine to fill the gas cylinder and charge the power battery at the same time, so that the charging condition and the filling condition overlap, thereby reducing the number of engine starts.

[0060] In one example: the controller acquires the voltage value of the power battery and the gas pressure value of the gas cylinder. If the voltage value of the power battery is lower than the minimum voltage value, triggering the engine to start, the controller starts the engine to charge the power battery and acquires a target gas pressure value greater than the minimum gas pressure value. If the current gas pressure value of the gas cylinder is less than or equal to the target gas pressure value, the controller simultaneously controls the engine to transfer mechanical energy to the air compressor to fill the gas cylinder. If the gas pressure value of the gas cylinder is lower than the minimum gas pressure value, triggering the engine to start the engine to fill the gas cylinder, the controller controls the engine to transfer mechanical energy to the air compressor to fill the gas cylinder and acquires a target voltage value greater than the minimum voltage value. If the current voltage value of the power battery is less than or equal to the target voltage value, the controller simultaneously controls the engine to charge the power battery.

[0061] In another example: the controller obtains the voltage value of the power battery and the gas pressure value of the gas cylinder. If the voltage value of the power battery is lower than the minimum voltage value, the engine is triggered to start charging the power battery and the minimum gas pressure value of the gas cylinder is increased. If the current gas pressure value of the gas cylinder is greater than the increased minimum gas pressure value, the gas cylinder is not charged. If the gas pressure value of the gas cylinder is lower than the minimum gas pressure value, the engine is triggered to start charging the gas cylinder and the minimum voltage value of the power battery is increased. If the current voltage value of the power battery is greater than the increased minimum voltage value, the power battery is not charged.

[0062] Furthermore, the charging process of the power battery and the filling process of the gas cylinder are carried out simultaneously to reduce the number of engine starts. Step S2 includes:

[0063] Step S21: If the voltage value is less than the minimum voltage value, control the engine to start to charge the power battery;

[0064] Step S22: Determine the pressure increase value of the gas cylinder based on the current voltage value of the power battery during the charging process and the current gas pressure value of the gas cylinder;

[0065] As one implementation method, the corresponding pressure boost value is looked up in a preset mapping table based on the current voltage value of the power battery and the current gas pressure value of the gas cylinder during the charging process. The preset mapping table stores the correspondence between voltage value, gas pressure value and pressure boost value. The preset mapping table can be obtained by calibration based on the overlap of the charging process and the inflation process to ensure that the charging process and the inflation process are carried out simultaneously.

[0066] Step S23: Determine the target air pressure value based on the air pressure increase value and the minimum air pressure value, and fill the gas cylinder with air according to the target air pressure value.

[0067] One approach is to add the pressure increase value and the minimum pressure value to obtain the target pressure value, and then fill the gas cylinder with gas according to the target pressure value.

[0068] As another implementation method, the air pressure increase value is multiplied by a preset increase coefficient, and the product is added to the minimum air pressure value to obtain the target air pressure value. Specifically, the preset increase coefficient can be determined according to the vehicle's driving conditions. If the vehicle's driving conditions consume a large amount of air, a larger preset increase coefficient is set accordingly, and vice versa. For example, the preset increase coefficient can be set to 0.7, 1, 3 or other values. This embodiment does not impose any restrictions here.

[0069] In one example, if the voltage of the power battery is lower than the minimum voltage, the engine is triggered to start and charge the power battery. Based on the current voltage of the power battery and the current air pressure of the gas cylinder, the air pressure boost value is looked up in the preset mapping table. The preset boost coefficient corresponding to the vehicle's driving conditions is determined to be 1. Then, the air pressure boost value is added to the minimum air pressure value to obtain the boosted minimum air pressure value.

[0070] This invention proposes a method for controlling the engine of a range-extended vehicle, comprising: acquiring the voltage value of a power battery and the gas pressure value of a gas cylinder; if the voltage value is less than a minimum voltage value, then inflating the gas cylinder according to a target inflation pressure value, wherein the target inflation pressure value is greater than the minimum inflation pressure value required to trigger the engine to inflate the gas cylinder; if the gas pressure value is less than the minimum inflation pressure value, then charging the power battery according to a target charging voltage value, wherein the target charging voltage value is greater than the minimum charging voltage value required to trigger the engine to charge the power battery. This invention utilizes the overlapping operating conditions of power battery charging and gas cylinder inflation, raising the lower limit of the inflation pressure during power generation and raising the lower limit of the charging voltage during inflation, allowing charging and inflation to occur simultaneously, reducing the number of engine starts and lowering vehicle fuel consumption.

[0071] refer to Figure 3 , Figure 3 This is a flowchart illustrating another embodiment of the range-extended vehicle engine control method of the present invention.

[0072] Based on the above embodiments, in this embodiment, step S22 includes:

[0073] Step S221: Determine the first estimated charging time based on the current voltage value and the target voltage value during the charging process of the power battery.

[0074] Understandably, the first estimated charging time can be the estimated time required for the power battery to rise from its current voltage value to the target voltage value; the target voltage value can be the voltage value at which charging of the power battery stops.

[0075] Step S222: Determine the first estimated inflation time based on the current gas pressure value and the target gas pressure value of the gas cylinder.

[0076] Understandably, the first estimated inflation time can be the estimated time required for the gas cylinder to rise from its current pressure value to the target pressure value; the target pressure value can be the pressure at which inflation of the gas cylinder stops.

[0077] Step S223: Determine the pressure increase value of the gas cylinder based on the first estimated charging time and the first estimated inflation time.

[0078] As one implementation method, the overlap time is determined based on the first estimated charging time and the first estimated inflation time, and the gas pressure increase value of the gas cylinder is determined based on the overlap time. Specifically, the maximum overlap time can be determined, and the gas pressure increase value is determined based on the gas pressure value of the gas cylinder corresponding to the maximum overlap time and the minimum gas pressure value.

[0079] Furthermore, in order to overlap the charging conditions of the power battery with the filling conditions of the gas cylinder to reduce the number of engine starts, step S223 includes: if the first estimated charging time is greater than the first estimated filling time, then during the process of controlling the engine to charge the power battery, the first estimated charging time and the first estimated filling time are updated; if the updated first estimated charging time is less than or equal to the updated first estimated filling time, then the pressure difference between the minimum gas pressure value and the gas pressure value corresponding to the updated first estimated filling time is used as the gas pressure increase value of the gas cylinder.

[0080] In one example: if the first estimated charging time is greater than the first estimated inflation time, then the first estimated charging time and the first estimated inflation time are updated during the charging process. If the first estimated charging time is less than or equal to the first estimated inflation time during the update process, then the gas pressure value of the gas cylinder corresponding to the updated first estimated inflation time at the current moment is obtained, and the gas pressure difference obtained by subtracting the lowest gas pressure value from the gas pressure value is used as the gas pressure increase value.

[0081] Furthermore, in order to overlap the charging conditions of the power battery with the filling conditions of the gas cylinder to reduce the number of engine starts, the step of determining the gas cylinder pressure increase value based on the first estimated charging time and the first estimated filling time includes: if the first estimated charging time is less than or equal to the first estimated filling time, then the pressure difference between the current gas pressure value and the minimum gas pressure value is used as the gas cylinder pressure increase value.

[0082] In one example, if the first estimated charging time is less than or equal to the first estimated inflation time, the difference between the current gas pressure value and the minimum gas pressure value is used as the gas pressure increase value.

[0083] In this embodiment, a first estimated charging time is determined based on the current voltage and target voltage during the charging process of the power battery; a first estimated filling time is determined based on the current and target gas pressure of the gas cylinder; and a gas pressure increase value for the gas cylinder is determined based on the first estimated charging time and the first estimated filling time. By determining the gas pressure increase value using the first estimated charging time and the first estimated filling time, the charging of the power battery and the filling of the gas cylinder can be performed simultaneously to the greatest extent possible, reducing the number of engine starts and allowing the engine to operate at its optimal operating point, thereby reducing vehicle fuel consumption.

[0084] refer to Figure 4 , Figure 4 This is a flowchart illustrating another embodiment of the range-extended vehicle engine control method of the present invention.

[0085] Based on the above embodiments, in this embodiment, step S3 includes:

[0086] Step S31: If the air pressure value is less than the minimum air pressure value, control the engine to start so as to output mechanical energy to the air compressor to fill the air cylinder.

[0087] Step S32: Determine the voltage boost value of the power battery based on the current air pressure value during the gas cylinder filling process and the current voltage value of the power battery.

[0088] Step S33: Determine the target voltage value based on the voltage boost value and the minimum voltage value, and charge the power battery according to the target voltage value.

[0089] As one implementation method, the corresponding voltage boost value is looked up in a preset mapping table based on the current gas pressure value of the gas cylinder and the current voltage value of the power battery during the gas cylinder filling process. The preset mapping table stores the correspondence between voltage value, gas pressure value and voltage boost value. The preset mapping table can be obtained by calibration based on the overlap of the charging process and the filling process to ensure that the charging process and the filling process are carried out simultaneously.

[0090] Furthermore, to overlap the charging conditions of the power battery with the filling conditions of the gas cylinder, thereby reducing the number of engine starts, the step of determining the voltage boost value of the power battery based on the current gas pressure value during the filling process of the gas cylinder and the current voltage value of the power battery includes: determining a second estimated filling time based on the current gas pressure value and the target gas pressure value during the filling process of the gas cylinder; determining a second estimated charging time based on the current voltage value and the target voltage value of the power battery; and determining the voltage boost value of the power battery based on the second estimated filling time and the second estimated charging time.

[0091] As one implementation method, the overlap time is determined based on the second estimated charging time and the second estimated inflation time, and the voltage boost value of the power battery is determined based on the overlap time. Specifically, the maximum overlap time can be determined, and the voltage boost value is determined based on the voltage value of the power battery corresponding to the maximum overlap time and the minimum voltage value.

[0092] It is understandable that the method for determining the voltage boost value of the power battery based on the second estimated inflation time and the second estimated charging time can be as follows: if the second estimated inflation time is greater than the second estimated charging time, then during the process of the air compressor inflating the gas cylinder, the second estimated charging time and the second estimated inflation time are updated; if the updated second estimated inflation time is less than or equal to the updated second estimated charging time, then the voltage difference between the minimum voltage value and the voltage value corresponding to the updated second estimated charging time is taken as the voltage boost value of the power battery.

[0093] In one example: if the second estimated charging time is greater than the second estimated inflation time, the second estimated charging time and the second estimated inflation time are updated during the inflation process. If the second estimated inflation time is less than or equal to the second estimated charging time during the update process, the voltage value of the power battery corresponding to the updated second estimated charging time at the current moment is obtained, and the voltage difference obtained by subtracting the lowest voltage value from the voltage value is used as the voltage boost value.

[0094] In another example, for instance: the minimum voltage is U1, the minimum air pressure is P1, the voltage boost is U2, and the air pressure boost is P2; if the voltage of the power battery is less than U1, triggering the engine to start and charge the power battery, then it is determined whether the current air pressure of the gas cylinder is less than or equal to (P1+P2). If so, the engine is simultaneously controlled to transmit mechanical energy to the air compressor, which inflates the gas cylinder. When the voltage of the power battery reaches the target voltage and the air pressure of the gas cylinder is greater than or equal to (P1+P2), the engine is controlled to stop. If the air pressure of the gas cylinder is less than P1, triggering the engine to start and charge the gas cylinder, then it is determined whether the current voltage of the power battery is less than or equal to (U1+U2). If so, the engine is simultaneously controlled to charge the power battery. When the air pressure of the gas cylinder reaches the target air pressure and the voltage of the power battery is greater than or equal to (U1+U2), the engine is controlled to stop.

[0095] In this embodiment, if the air pressure value is less than the minimum air pressure value, the engine is started to output mechanical energy to the air compressor to fill the gas cylinder; the voltage boost value of the power battery is determined based on the current air pressure value and the current voltage value of the power battery during the filling process; and the minimum voltage value of the power battery is increased based on the voltage boost value. In this embodiment, when the engine is triggered to fill the gas cylinder, the minimum voltage value is increased based on the voltage boost value determined by the current voltage and current air pressure, thereby enabling simultaneous power generation and filling, reducing the number of engine starts and lowering vehicle fuel consumption.

[0096] Furthermore, this embodiment of the invention also proposes a storage medium storing a range-extended vehicle engine control program, which, when executed by a processor, implements the steps of the range-extended vehicle engine control method described above.

[0097] Reference Figure 5 , Figure 5 This is a structural block diagram of an embodiment of the range-extended vehicle engine control device of the present invention.

[0098] like Figure 5 As shown, the range-extended vehicle engine control device proposed in this embodiment of the invention includes:

[0099] The acquisition module 10 is used to acquire the voltage value of the power battery and the gas pressure value of the gas cylinder;

[0100] The inflation module 20 is used to inflate the gas cylinder according to a target inflation pressure value if the voltage value is less than the minimum voltage value, wherein the target inflation pressure value is greater than the minimum pressure value that triggers the engine to inflate the gas cylinder.

[0101] The charging module 30 is used to charge the power battery according to a target charging voltage value if the air pressure value is less than the minimum air pressure value, wherein the target charging voltage value is greater than the minimum voltage value that triggers the engine to charge the power battery.

[0102] This invention provides an engine control device for a range-extended vehicle. It acquires the voltage value of the power battery and the gas pressure value of the gas cylinder. If the voltage value is less than a minimum voltage value, the gas cylinder is inflated according to a target inflation pressure value, which is greater than the minimum inflation pressure value required to trigger the engine to inflate the gas cylinder. If the gas pressure value is less than the minimum inflation pressure value, the power battery is charged according to a target charging voltage value, which is greater than the minimum charging voltage value required to trigger the engine to charge the power battery. This invention utilizes the overlapping operation of power battery charging and gas cylinder inflation. During power generation, the lower limit of the inflation pressure is increased; during inflation, the lower limit of the charging voltage is increased, allowing charging and inflation to occur simultaneously, reducing the number of engine starts and lowering vehicle fuel consumption.

[0103] Based on one embodiment of the range-extended vehicle engine control device of the present invention, another embodiment of the range-extended vehicle engine control device of the present invention is proposed.

[0104] In this embodiment, the inflation module 20 is further configured to: control the engine to start charging the power battery if the voltage value is less than the minimum voltage value; determine the pressure increase value of the gas cylinder based on the current voltage value during the power battery charging process and the current gas pressure value of the gas cylinder; determine the target gas pressure value based on the pressure increase value and the minimum gas pressure value, and inflate the gas cylinder according to the target gas pressure value. The inflation module 20 is also configured to: determine a first estimated charging time based on the current voltage value and the target voltage value during the power battery charging process; determine a first estimated inflation time based on the current gas pressure value and the target gas pressure value of the gas cylinder; and determine the pressure increase value of the gas cylinder based on the first estimated charging time and the first estimated inflation time.

[0105] The inflation module 20 is further configured to update the first estimated charging time and the first estimated inflation time during the process of controlling the engine to charge the power battery if the first estimated charging time is greater than the first estimated inflation time; and if the updated first estimated charging time is less than or equal to the updated first estimated inflation time, use the pressure difference between the minimum pressure value and the pressure value corresponding to the updated first estimated inflation time as the pressure increase value of the gas cylinder.

[0106] The inflation module 20 is further configured to use the pressure difference between the current pressure value and the minimum pressure value as the pressure increase value of the gas cylinder if the first estimated charging time is less than or equal to the first estimated inflation time.

[0107] The charging module 30 is further configured to: control the engine to start to output mechanical energy to the air compressor to inflate the gas cylinder if the gas pressure value is less than the minimum gas pressure value; determine the voltage boost value of the power battery based on the current gas pressure value and the current voltage value of the power battery during the gas cylinder inflation process; determine the target voltage value based on the voltage boost value and the minimum voltage value; and charge the power battery based on the target voltage value.

[0108] The charging module 30 is further configured to determine a second estimated charging time based on the current gas pressure value and the target gas pressure value during the gas cylinder charging process; determine a second estimated charging time based on the current voltage value and the target voltage value of the power battery; and determine the voltage boost value of the power battery based on the second estimated charging time and the second estimated charging time.

[0109] Other embodiments or specific implementations of the range-extended vehicle engine control device of the present invention can be referred to the above-described method embodiments, and will not be repeated here.

[0110] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0111] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0112] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory / random access memory, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0113] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for controlling an engine in a range-extended vehicle, characterized in that, The method includes: Obtain the voltage value of the power battery and the gas pressure value of the gas cylinder; If the voltage value is less than the minimum voltage value, the engine is controlled to start to charge the power battery, and the gas cylinder is filled with gas according to the target filling pressure value, which is greater than the minimum gas pressure value that triggers the engine to fill the gas cylinder. If the air pressure value is less than the minimum air pressure value, the engine is controlled to start to fill the air cylinder and the power battery is charged according to the target charging voltage value, which is greater than the minimum voltage value that triggers the engine to charge the power battery.

2. The method as described in claim 1, characterized in that, If the voltage value is less than the minimum voltage value, the engine is controlled to start to charge the power battery, and the gas cylinder is filled with gas according to the target filling pressure value, including: If the voltage value is less than the minimum voltage value, the engine is controlled to start to charge the power battery; The pressure increase value of the gas cylinder is determined based on the current voltage value of the power battery during the charging process and the current gas pressure value of the gas cylinder. The target air pressure value is determined based on the air pressure increase value and the minimum air pressure value, and the air cylinder is filled with air according to the target air pressure value.

3. The method as described in claim 2, characterized in that, Determining the pressure increase value of the gas cylinder based on the current voltage value during the charging process of the power battery and the current gas pressure value of the gas cylinder includes: The first estimated charging time is determined based on the current voltage value and the target voltage value during the charging process of the power battery; The first estimated inflation time is determined based on the current and target pressure values ​​of the gas cylinder. The pressure increase value of the gas cylinder is determined based on the first estimated charging time and the first estimated inflation time.

4. The method as described in claim 3, characterized in that, The step of determining the gas pressure increase value of the gas cylinder based on the first estimated charging time and the first estimated filling time includes: If the first estimated charging time is greater than the first estimated inflation time, then during the process of controlling the engine to charge the power battery, the first estimated charging time and the first estimated inflation time are updated. If the updated first estimated charging time is less than or equal to the updated first estimated inflation time, then the pressure difference between the minimum pressure value and the pressure value corresponding to the updated first estimated inflation time shall be used as the pressure increase value of the gas cylinder.

5. The method as described in claim 3, characterized in that, The step of determining the gas pressure increase value of the gas cylinder based on the first estimated charging time and the first estimated filling time includes: If the first estimated charging time is less than or equal to the first estimated inflation time, then the pressure difference between the current pressure value and the minimum pressure value is taken as the pressure increase value of the gas cylinder.

6. The method according to any one of claims 1-5, characterized in that, If the air pressure value is less than the minimum air pressure value, then the engine is controlled to start to fill the air cylinder, and the power battery is charged according to the target charging voltage value, including: If the air pressure value is less than the minimum air pressure value, the engine is started to output mechanical energy to the air compressor to fill the air cylinder; The voltage boost value of the power battery is determined based on the current gas pressure value during the gas cylinder filling process and the current voltage value of the power battery. The target voltage value is determined based on the voltage boost value and the minimum voltage value, and the power battery is charged according to the target voltage value.

7. The method as described in claim 6, characterized in that, The step of determining the voltage boost value of the power battery based on the current gas pressure value during the gas cylinder filling process and the current voltage value of the power battery includes: The second estimated inflation time is determined based on the current pressure value and the target pressure value during the inflation process of the gas cylinder; The second estimated charging time is determined based on the current voltage value and the target voltage value of the power battery; The voltage boost value of the power battery is determined based on the second estimated inflation time and the second estimated charging time.

8. A range-extender vehicle engine control device, characterized in that, The device includes: The acquisition module is used to acquire the voltage value of the power battery and the gas pressure value of the gas cylinder; The inflation module is used to control the engine to start charging the power battery if the voltage value is less than the minimum voltage value, and to inflate the gas cylinder according to the target inflation pressure value, wherein the target inflation pressure value is greater than the minimum pressure value that triggers the engine to inflate the gas cylinder. The charging module is used to control the engine to start and fill the gas cylinder if the gas pressure value is less than the minimum gas pressure value, and to charge the power battery according to the target charging voltage value, wherein the target charging voltage value is greater than the minimum voltage value that triggers the engine to charge the power battery.

9. A range-extender vehicle engine control device, characterized in that, The device includes a memory and a processor, the memory storing a range-extended vehicle engine control program executable on the processor, the range-extended vehicle engine control program being configured to implement the steps of the range-extended vehicle engine control method as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium stores a range-extender vehicle engine control program, which, when executed by a processor, implements the steps of the range-extender vehicle engine control method as described in any one of claims 1 to 7.

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