Speed regulation method and device of engine of vehicle, storage medium and processor

Abstract

The application discloses a speed regulation method and device of an engine of a vehicle, a storage medium and a processor. The method comprises the following steps: acquiring a current speed of the engine of the vehicle; determining a speed regulation strategy of the engine based on the current speed and a target speed of the engine; determining a first output power of a generator of the vehicle based on the speed regulation strategy; and adjusting the speed of the engine from the current speed to the target speed based on the first output power and a second output power of the engine, wherein the first output power is used to represent the power generation power of the generator in a unit of time, and the second output power is used to represent the output power of the engine in a unit of time. The application solves the technical problem that the speed of the engine cannot be adjusted by the motor due to insufficient allowable power capacity of a high-voltage battery.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, in particular to a speed regulation method and device of an engine of a vehicle, a storage medium and a processor. BACKGROUND

[0002] In a vehicle, due to the fast response rate and high response accuracy of the motor, the speed of the engine of the hybrid vehicle is generally adjusted by the motor. However, in the process of motor speed regulation, the size of the motor speed regulation power is directly affected by the allowable power capacity of the high-voltage battery, thereby causing the technical problem that the speed of the engine cannot be adjusted by the motor due to insufficient allowable power capacity of the high-voltage battery.

[0003] At present, no effective solution has been proposed for the technical problem that the speed of the engine cannot be adjusted by the motor due to insufficient allowable power capacity of the high-voltage battery. SUMMARY

[0004] The embodiments of the present application provide a speed regulation method and device of an engine of a vehicle, a storage medium and a processor to at least solve the technical problem that the speed of the engine cannot be adjusted by the motor due to insufficient allowable power capacity of the high-voltage battery.

[0005] According to an aspect of the embodiments of the present application, a speed regulation method of an engine of a vehicle is provided. The method comprises: obtaining a current speed of the engine of the vehicle; determining a speed regulation strategy of the engine based on the current speed and a target speed of the engine, wherein the speed regulation strategy is used to represent a rule for regulating the speed of the engine according to a mapping relationship among an output power of a device of the vehicle, the current speed and the target speed; determining a first output power of a generator of the vehicle based on the speed regulation strategy; and adjusting the speed of the engine from the current speed to the target speed based on the first output power and a second output power of the engine, wherein the first output power is used to represent the power generation power of the generator in a unit of time, and the second output power is used to represent the output power of the engine in a unit of time.

[0006] Optionally, determining the speed regulation strategy of the engine based on the current speed and the target speed of the engine comprises: determining a first speed difference between the current speed and the target speed; and determining the speed regulation strategy based on the first speed difference.

[0007] Optionally, the determining the speed regulation strategy based on the first speed difference comprises: in response to the first speed difference being greater than a first threshold and less than or equal to a second threshold, determining the speed regulation strategy as a first speed regulation strategy, wherein the first threshold is less than the second threshold, and the first speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among the third output power of the accessory of the vehicle, the current speed and the target speed; and in response to the first speed difference being greater than the second threshold, determining the speed regulation strategy as a second speed regulation strategy, wherein the second speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among the first output power, the current speed and the target speed.

[0008] Optionally, the determining the first output power of the generator of the vehicle based on the speed regulation strategy comprises: in response to the speed regulation strategy being the first speed regulation strategy, determining a remaining output power of the second output power except for the third output power of the accessory of the vehicle, the fourth output power of the drive motor of the vehicle and the fifth output power of the battery of the vehicle as the first output power, wherein the first speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among the third output power of the accessory of the vehicle, the current speed and the target speed; and in response to the speed regulation strategy being the second speed regulation strategy, determining a coefficient of a second speed difference between the current speed and the target speed, and determining the first output power based on at least the coefficient and the target speed regulation power, wherein the second speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among the first output power, the current speed and the target speed.

[0009] Optionally, the determining the first output power based on at least the coefficient and the target speed regulation power comprises: determining a first output power threshold of the generator; performing a difference calculation on the first output power threshold and a product of the coefficient and the target speed regulation power to obtain a difference between the first output power threshold and the product; and determining the difference as the first output power.

[0010] Optionally, the adjusting the speed of the engine from the current speed to the target speed based on the first output power and the second output power of the engine comprises: in response to the first output power being greater than the second output power, adjusting the speed of the engine from the current speed to the target speed.

[0011] Optionally, the method further comprises: in response to the first output power being less than or equal to the second output power, adjusting the first output power, so that the speed of the engine is adjusted from the current speed to the target speed in a case that the adjusted first output power is greater than the second output power.

[0012] Optionally, the obtaining the current speed of the engine of the vehicle comprises: monitoring a signal of the engine to obtain a monitoring result; and extracting the current speed from the monitoring result.

[0013] According to an aspect of an embodiment of the present application, a speed regulation device of an engine of a vehicle is provided. The device can include: an obtaining unit configured to obtain a current speed of the engine of the vehicle; a first determining unit configured to determine a speed regulation strategy of the engine based on the current speed and a target speed of the engine, wherein the speed regulation strategy is configured to represent a rule of regulating the engine according to a mapping relationship among an output power of an equipment of the vehicle, the current speed and the target speed; a second determining unit configured to determine a first output power of a generator of the vehicle based on the speed regulation strategy; and an adjusting unit configured to adjust the speed of the engine from the current speed to the target speed based on the first output power and a second output power of the engine, wherein the first output power is configured to represent a power generation power of the generator in a unit time, and the second output power is configured to represent an output power of the engine in a unit time.

[0014] According to another aspect of an embodiment of the present application, a processor is also provided. The processor is configured to run a program, wherein the program, when run by the processor, performs the speed regulation method of the engine of the vehicle of the embodiments of the present application.

[0015] According to another aspect of an embodiment of the present application, an electronic device is also provided. The electronic device includes: a memory configured to store an executable program; and a processor configured to run the program, wherein the program, when run, performs the speed regulation method of the engine of the vehicle of the embodiments of the present application.

[0016] According to another aspect of an embodiment of the present application, a computer readable storage medium is also provided. The computer readable storage medium includes a stored program, wherein the program, when run, controls a device in which the computer readable storage medium is located to perform the speed regulation method of the engine of the vehicle of the embodiments of the present application.

[0017] According to another aspect of an embodiment of the present application, a computer program product is also provided. The computer program product includes a computer program, wherein the computer program, when executed by a processor, implements the speed regulation method of the engine of the vehicle of the embodiments of the present application.

[0018] According to another aspect of an embodiment of the present application, a computer program product is also provided. The computer program product includes a non-volatile computer readable storage medium configured to store a computer program, wherein the computer program, when executed by a processor, implements the speed regulation method of the engine of the vehicle of the embodiments of the present application.

[0019] According to another aspect of an embodiment of the present application, a computer program is also provided. The computer program, when executed by a processor, implements the speed regulation method of the engine of the vehicle of the embodiments of the present application.

[0020] In the embodiment of the present application, when the engine of the vehicle is regulated, the current speed of the engine of the vehicle can be obtained. According to the obtained current speed and the target speed of the engine, the regulation strategy of the engine can be determined, that is, the regulation rule of the engine according to the mapping relationship among the output power of the device of the vehicle, the current speed and the target speed can be determined. According to the determined regulation strategy, the first output power of the generator of the vehicle can be determined, and according to the first output power of the generator and the second output power of the engine, the speed of the engine can be adjusted from the current speed to the target speed, so as to achieve the purpose that the size of the motor regulation power is not directly affected by the allowable power capacity of the high-voltage battery, solve the technical problem that the speed of the engine cannot be adjusted by the motor due to the insufficient allowable power capacity of the high-voltage battery, and achieve the technical effect that the speed of the engine can be adjusted by the motor. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0022] Figure 1 is a flow chart of a regulation method of an engine of a vehicle according to an embodiment of the present application;

[0023] Figure 2 is a flow chart of an engine regulation control method in an extremely low temperature environment according to an embodiment of the present application;

[0024] Figure 3 is a schematic diagram of a regulation strategy according to an embodiment of the present application;

[0025] Figure 4 is a schematic diagram of another regulation strategy according to an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of a regulation device of an engine of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] 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 described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and the above-described accompanying drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] Embodiment 1

[0030] According to an embodiment of the present application, a speed regulation method of an engine of a vehicle is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that herein.

[0031] Figure 1 is a flowchart of a speed regulation method of an engine of a vehicle according to an embodiment of the present application, which can include the following steps:

[0032] Step S101, obtaining a current speed of an engine of a vehicle.

[0033] In the technical solution provided by the above step S101 of the present application, the current speed can be used to represent the actual speed of the engine at the current time.

[0034] In this embodiment, the current speed of the engine of the vehicle is obtained, which can be the actual speed of the engine at the current time. Alternatively, the embodiment monitors the signals of the engine of the vehicle in real time, and from the monitored signals of the engine, the actual speed of the engine at the current time can be determined.

[0035] Step S102, determining a speed regulation strategy of the engine based on the current speed and a target speed of the engine.

[0036] In the technical solution provided by the above step S102 of the present application, the speed regulation strategy can be used to represent the rule of regulating the speed of the engine according to the mapping relationship between the output power of the device of the vehicle, the current speed and the target speed. The output power of the device of the vehicle can at least include: a first output power of a generator of the vehicle and a third output power of an accessory of the vehicle. For example, the accessory of the vehicle can be, but is not limited to, a high-voltage accessory, which is only used as an example and is not limited specifically.

[0037] In this embodiment, after obtaining the current speed of the engine of the vehicle, the speed regulation strategy of the engine is determined based on the current speed and the target speed of the engine. That is, on the basis of obtaining the current speed of the engine of the vehicle, the difference between the current speed of the engine and the target speed of the engine can be determined, and the relationship between the obtained difference and the threshold value is judged, to determine whether the speed regulation strategy of the engine is the first speed regulation strategy or the second speed regulation strategy. The first speed regulation strategy can be used to represent the rule of regulating the speed of the engine according to the mapping relationship between the third output power of the accessory of the vehicle and the current speed and the target speed, and the second speed regulation strategy can be used to represent the rule of regulating the speed of the engine according to the mapping relationship between the first output power and the current speed and the target speed.

[0038] It should be noted that the above-mentioned threshold value can include a first threshold value and a second threshold value, wherein the first threshold value can be less than the second threshold value. For example, the first threshold value can be 180 rpm, and the second threshold value can be 200 rpm, which is only exemplified and not specifically limited.

[0039] In step S103, the first output power of the generator of the vehicle is determined based on the speed regulation strategy.

[0040] In the technical solution provided by the above-mentioned step S103 of the application, the speed regulation strategy can be the first speed regulation strategy or the second speed regulation strategy, which is only exemplified and not specifically limited.

[0041] In this embodiment, after determining the speed regulation strategy of the engine based on the current speed and the target speed of the engine, the first output power of the generator of the vehicle is determined based on the speed regulation strategy. That is, on the basis of determining the speed regulation strategy of the engine, it is judged whether the speed regulation strategy is the first speed regulation strategy or the second speed regulation strategy. If it is judged that the speed regulation strategy is the first speed regulation strategy, the first output power of the generator is determined according to the second output power of the engine, the third output power of the accessory of the vehicle, the fourth output power of the drive motor of the vehicle and the fifth output power of the battery of the vehicle; if it is judged that the speed regulation strategy is the second speed regulation strategy, the first output power of the generator is determined according to the coefficient of the difference between the current speed and the target speed of the engine.

[0042] In step S104, the speed of the engine is adjusted from the current speed to the target speed based on the first output power and the second output power of the engine.

[0043] In the technical solution provided in the step S104 of the present application, the first output power can be used to represent the power generation of the generator in a unit of time, and the second output power can be used to represent the output power of the engine in a unit of time.

[0044] In this embodiment, after determining the first output power of the generator of the vehicle based on the speed regulation strategy, the speed of the engine is adjusted from the current speed to the target speed based on the first output power and the second output power of the engine. That is, based on the determination of the first output power of the generator, the relationship between the first output power of the generator and the second output power of the engine is judged. If it is judged that the first output power of the generator is greater than the second output power of the engine, the speed of the engine is adjusted from the current speed to the target speed, thereby achieving the purpose of regulating the speed of the engine of the vehicle.

[0045] The steps S101 to S104 of the present application can obtain the current speed of the engine of the vehicle when regulating the speed of the engine of the vehicle. According to the obtained current speed and the target speed of the engine, the speed regulation strategy of the engine can be determined, that is, the rule of regulating the speed of the engine according to the mapping relationship between the output power of the equipment of the vehicle and the current speed and the target speed can be determined. According to the determined speed regulation strategy, the first output power of the generator of the vehicle can be determined, and according to the first output power of the generator and the second output power of the engine, the speed of the engine can be adjusted from the current speed to the target speed, thereby achieving the purpose of avoiding that the size of the motor speed regulation power is directly affected by the allowable power capacity of the high-voltage battery, solving the technical problem that the speed of the engine cannot be adjusted by the motor due to insufficient allowable power capacity of the high-voltage battery, and achieving the technical effect that the speed of the engine can be adjusted by the motor.

[0046] The above method of this embodiment will be further introduced below.

[0047] As an optional embodiment, in the step S102, the speed regulation strategy of the engine is determined based on the current speed and the target speed of the engine, including: determining a first speed difference between the current speed and the target speed; and determining the speed regulation strategy based on the first speed difference.

[0048] In this embodiment, after obtaining the current speed of the engine of the vehicle, a first speed difference between the current speed and the target speed is determined; based on the first speed difference, the speed regulation strategy is determined. That is, on the basis of obtaining the current speed of the engine of the vehicle, the first speed difference between the current speed of the engine and the target speed of the engine can be determined, and the relationship between the obtained first speed difference and the first threshold value and the second threshold value is judged, so as to determine whether the speed regulation strategy of the engine is the first speed regulation strategy or the second speed regulation strategy. If it is judged that the obtained first speed difference is greater than the first threshold value and less than or equal to the second threshold value, it can be determined that the speed regulation strategy of the engine is the first speed regulation strategy, and if it is judged that the obtained first speed difference is greater than the second threshold value, it can be determined that the speed regulation strategy of the engine is the second speed regulation strategy.

[0049] As an optional embodiment, based on the first speed difference, the speed regulation strategy is determined, including: in response to the first speed difference being greater than the first threshold value and less than or equal to the second threshold value, determining that the speed regulation strategy is the first speed regulation strategy; and in response to the first speed difference being greater than the second threshold value, determining that the speed regulation strategy is the second speed regulation strategy.

[0050] In this embodiment, the first threshold value can be less than the second threshold value, the first speed regulation strategy can be used to represent a rule for regulating the speed of the engine according to a mapping relationship among the third output power of the accessory of the vehicle, the current speed and the target speed, and the second speed regulation strategy can be used to represent a rule for regulating the speed of the engine according to a mapping relationship among the first output power, the current speed and the target speed.

[0051] In this embodiment, after determining the first speed difference between the current speed and the target speed, in response to the first speed difference being greater than the first threshold value and less than or equal to the second threshold value, the speed regulation strategy is determined as the first speed regulation strategy; and in response to the first speed difference being greater than the second threshold value, the speed regulation strategy is determined as the second speed regulation strategy. That is, on the basis of determining the first speed difference between the current speed and the target speed, the relationship between the obtained first speed difference and the first threshold value and the second threshold value is judged, so as to determine whether the speed regulation strategy of the engine is the first speed regulation strategy or the second speed regulation strategy. If it is judged that the obtained first speed difference is greater than the first threshold value and less than or equal to the second threshold value, it can be determined that the speed regulation strategy of the engine is the first speed regulation strategy, and if it is judged that the obtained first speed difference is greater than the second threshold value, it can be determined that the speed regulation strategy of the engine is the second speed regulation strategy.

[0052] Optionally, the first speed regulation strategy can be implemented by the following formulas (1) and (2), and the second speed regulation strategy can be implemented by the following formulas (3) and (4):

[0053] P HVAcc =k1*P HVAcc(1)

[0054] k1=f(n Eng -n EngTgt ) (2)

[0055] P GMRegCap =P GMRegCap -k2*P SpdRsv (3)

[0056] k2=f(n Eng -n EngTgt ) (4)

[0057] Wherein, P HVAcc may be used to represent the high-pressure accessory power, n Eng may be used to represent the actual speed of the engine, n EngTgt may be used to represent the target speed of the engine, k1may be used to represent the accessory power speed regulation reserve coefficient, n Eng -n EngTgt The greater the difference, the smaller the value of k1, and the minimum limit is 0. P GMRegCap may be used to represent the maximum power generation capability of the generator, k2may be used to represent the forced speed regulation reserve coefficient, P SpdRsv may be used to represent the forced speed regulation reserve power.

[0058] Optionally, if the difference is 190 rpm, the first threshold is 180 rpm, and the second threshold is 200 rpm, it is determined that the difference of 190 rpm is greater than the first threshold of 180 rpm, and less than or equal to the second threshold of 200 rpm, so the speed regulation strategy of the engine can be determined as the first speed regulation strategy, which is only used as an example and is not limited.

[0059] Optionally, if the difference is 210 rpm, the first threshold is 180 rpm, and the second threshold is 200 rpm, it is determined that the difference of 210 rpm is greater than the second threshold of 200 rpm, so the speed regulation strategy of the engine can be determined as the second speed regulation strategy, which is only used as an example and is not limited.

[0060] As an optional embodiment, in step S103, based on the speed regulation strategy, the first output power of the generator of the vehicle is determined, including: in response to the speed regulation strategy being the first speed regulation strategy, determining the remaining output power of the second output power except for the third output power of the accessories of the vehicle, the fourth output power of the drive motor of the vehicle and the fifth output power of the battery of the vehicle as the first output power; in response to the speed regulation strategy being the second speed regulation strategy, determining a coefficient of the second speed difference between the current speed and the target speed, and determining the first output power based on at least the coefficient and the target speed regulation power.

[0061] In this embodiment, the first speed regulation strategy can be used to represent a rule for regulating the speed of the engine according to a mapping relationship among the third output power of the accessory of the vehicle, the current speed and the target speed, and the second speed regulation strategy can be used to represent a rule for regulating the speed of the engine according to a mapping relationship among the first output power, the current speed and the target speed.

[0062] In this embodiment, after determining the speed regulation strategy of the engine based on the current speed and the target speed of the engine, it is determined whether the speed regulation strategy is the first speed regulation strategy or the second speed regulation strategy. If it is determined that the speed regulation strategy is the first speed regulation strategy, the remaining output power of the second output power except for the third output power of the accessory of the vehicle, the fourth output power of the drive motor of the vehicle and the fifth output power of the battery of the vehicle is determined as the first output power. If it is determined that the speed regulation strategy is the second speed regulation strategy, a coefficient of a second speed difference between the current speed and the target speed is determined, and the first output power of the generator is determined according to at least the coefficient and the target speed regulation power.

[0063] It should be noted that the coefficient of the second speed difference can be a forced speed regulation reserved coefficient, and the target speed regulation power can be a forced speed regulation reserved power, which are only used as examples and are not limited in particular.

[0064] As an optional embodiment, the determination of the first output power based on at least the coefficient and the target speed regulation power includes: determining a first output power threshold of the generator; performing difference calculation on the first output power threshold and a product of the coefficient and the target speed regulation power to obtain a difference between the first output power threshold and the product; and determining the difference as the first output power.

[0065] In this embodiment, the first output power threshold can be used to represent the maximum power generation of the generator.

[0066] In this embodiment, after determining the coefficient of the second speed difference between the current speed and the target speed, the first output power threshold of the generator is determined; difference calculation is performed on the first output power threshold and a product of the coefficient and the target speed regulation power to obtain a difference between the first output power threshold and the product; and the difference is determined as the first output power. That is, based on the determination of the coefficient of the second speed difference between the current speed and the target speed, the first output power threshold of the generator can be calculated by the following formula (5). The difference between the first output power threshold and the product of the coefficient and the target speed regulation power can be obtained by performing difference calculation on the obtained first output power threshold and the product through the above formulas (3) and (4), and the difference between the first output power threshold and the product is determined as the first output power of the generator.

[0067]

[0068] wherein T GMRegCap may be used to represent the allowable power generation capability of the generator, P GMRegCap may be used to represent the maximum power generation capability of the generator, n GM may be used to represent the actual rotation speed of the generator.

[0069] As an optional embodiment, the step S104 of adjusting the rotation speed of the engine from the current rotation speed to the target rotation speed based on the first output power and the second output power of the engine comprises: adjusting the rotation speed of the engine from the current rotation speed to the target rotation speed in response to the first output power being greater than the second output power.

[0070] In this embodiment, after determining the first output power of the generator of the vehicle based on the speed regulation strategy, the rotation speed of the engine is adjusted from the current rotation speed to the target rotation speed in response to the first output power being greater than the second output power. That is, on the basis of determining the first output power of the generator, the relationship between the first output power of the generator and the second output power of the engine is judged, and if it is judged that the first output power of the generator is greater than the second output power of the engine, the rotation speed of the engine is adjusted from the current rotation speed to the target rotation speed, so as to achieve the purpose of regulating the speed of the engine of the vehicle.

[0071] Optionally, the maximum power capability of the engine can be calculated according to the following formula (6):

[0072]

[0073] wherein P EngDrvCap may be used to represent the maximum power capability of the engine, T EngDrvCap may be used to represent the allowable power generation capability of the generator, n EngTgt may be used to represent the target rotation speed of the engine.

[0074] Optionally, the power of the engine can be limited by the following formula (7):

[0075] P Eng ≤{P EngDrvCap =min{P TMDrv +P HVAcc +P Bat_chrg , P GMRegCap , P EngDrvCap}} (7)

[0077] wherein P TMDrv may be used to represent the actual power of the driving motor, P SpdPwrRsv may be used to represent the speed regulation power of the generator.

[0078] As an optional embodiment, the method further comprises: in response to the first output power being less than or equal to the second output power, adjusting the first output power so that the adjusted first output power is greater than the second output power, and adjusting the speed of the engine from the current speed to the target speed.

[0079] In this embodiment, in response to the first output power being less than or equal to the second output power, the first output power is adjusted so that the adjusted first output power is greater than the second output power, and the speed of the engine is adjusted from the current speed to the target speed. That is, on the basis of determining the first output power of the generator, the relationship between the first output power of the generator and the second output power of the engine is judged, and if it is judged that the first output power of the generator is less than or equal to the second output power of the engine, the first output power of the generator is adjusted so that in the case that the adjusted first output power is greater than the second output power, the speed of the engine can be adjusted from the current speed to the target speed.

[0080] As an optional embodiment, the step S101 of acquiring the current speed of the engine of the vehicle comprises: monitoring the signal of the engine to obtain a monitoring result; and extracting the speed from the monitoring result to obtain the current speed.

[0081] In this embodiment, the signal of the engine is monitored to obtain a monitoring result, and the speed is extracted from the monitoring result to obtain the current speed. That is, the signal of the engine of the vehicle is monitored in real time to obtain a monitoring result, and the feature of the speed is extracted from the obtained monitoring result to obtain the actual speed of the engine at the current time.

[0082] In the embodiment of the application, when the speed of the engine of the vehicle is adjusted, the current speed of the engine of the vehicle can be acquired. According to the acquired current speed and the target speed of the engine, the speed adjustment strategy of the engine can be determined, that is, the rule of adjusting the speed of the engine according to the mapping relationship among the output power of the equipment of the vehicle, the current speed and the target speed can be determined. According to the determined speed adjustment strategy, the first output power of the generator of the vehicle can be determined, and according to the first output power of the generator and the second output power of the engine, the speed of the engine can be adjusted from the current speed to the target speed, thereby achieving the purpose of avoiding that the size of the motor speed adjustment power is directly affected by the allowable power capacity of the high-voltage battery, solving the technical problem that the speed of the engine cannot be adjusted by the motor due to insufficient allowable power capacity of the high-voltage battery, and achieving the technical effect that the speed of the engine can be adjusted by the motor.

[0083] Embodiment 2

[0084] The technical solutions of the embodiments of the application will be described below in combination with preferred embodiments.

[0085] In a hybrid vehicle, the speed of the engine of the hybrid vehicle is generally adjusted by the motor due to the fast response rate and high response accuracy of the motor. However, in the process of motor speed adjustment, the size of the motor speed adjustment power is directly affected by the allowable power capacity of the high-voltage battery, thereby causing the technical problem that the speed of the engine cannot be adjusted by the motor due to insufficient allowable power capacity of the high-voltage battery.

[0086] To solve the above technical problem, the embodiment of the application provides a speed adjustment method for an engine of a vehicle, which determines a speed adjustment strategy for adjusting the speed of the engine according to the current speed and the target speed of the engine of the vehicle. The speed of the engine is adjusted according to the output power of the generator determined according to the speed adjustment strategy, thereby achieving the purpose of avoiding that the size of the motor speed adjustment power is directly affected by the allowable power capacity of the high-voltage battery, solving the technical problem that the speed of the engine cannot be adjusted by the motor due to insufficient allowable power capacity of the high-voltage battery, and realizing the technical effect that the speed of the engine can be adjusted by the motor.

[0087] In this embodiment, the speed of the engine of the vehicle can be adjusted by the engine speed adjustment control method suitable for an extremely low temperature environment. For example, Figure 2 is a flowchart of an engine speed adjustment control method in an extremely low temperature environment according to the embodiment of the application, as Figure 2 shown, the method can include the following steps:

[0088] In step S201, the power and the like information of the high-voltage battery, the engine, the generator and the high-voltage accessories are obtained.

[0089] In the technical solution provided in the above step S201 of the application, the allowable charging power capacity of the high-voltage battery, the actual speed of the engine, the allowable power generation capacity of the engine, the target speed of the engine, the allowable power generation capacity of the generator and the power of the high-voltage accessories are obtained.

[0090] In this embodiment, the allowable charging power capacity (P Bat_chrg ) of the high-voltage battery can be reported by a battery management system (BMS), the actual speed (n Eng ) of the engine and the allowable power generation capacity (T EngDrvCap ) of the engine can be reported by an engine management system (EMS), the target speed (n EngTgt ) of the engine and the power (P HVAccThe allowable power generation capability (T GMRegCap The high-voltage accessory power can be the sum of DCDC power and air conditioner high-voltage power, and the target engine speed can be obtained by looking up the target engine power on the optimal power economy line.

[0091] In this embodiment, the maximum power generation capability of the generator can be calculated by formula (5), and the maximum power capability of the engine can be calculated by formula (6).

[0092] After obtaining the power information of the high-voltage battery, the engine, the generator and the high-voltage accessory, the process proceeds to step S202 and step S203 to calculate the difference between the actual engine speed and the target engine speed, and determine whether the difference is greater than n △0 .

[0093] If the difference is less than or equal to n △0 , the speed regulation process is ended, and if the difference is greater than n △0 , the process proceeds to step S204 to determine whether the difference is greater than n △1 .

[0094] If the difference is greater than n △1 , the process proceeds to step S205, step S206 and step S207 to activate the second speed regulation strategy, correct the high-voltage accessory power, and regulate the engine and the generator in coordination, and if the difference is less than or equal to n △1 , the process proceeds to step S208 and step S209 to activate the first speed regulation strategy and correct the maximum power capability of the engine.

[0095] In this embodiment, n △0 can be set to 180 rpm, and n △1 can be set to 200 rpm, which are only examples and are not limited.

[0096] In this embodiment, when the actual engine speed gradually exceeds the target engine speed, the engine capability is gradually reduced to leave a power interval for motor speed regulation, and when the actual engine speed gradually approaches the target engine speed, the engine capability is gradually restored to the normal calculated value. The engine power can be limited by formula (7).

[0097] It should be noted that when the speed of the engine is regulated by the generator, the difference between the power of the engine and the power of the generator is the regulating power. When it is required to regulate the speed of the engine in the small direction, the power generation of the generator is increased (the symbol is negative), and if the power generation of the generator after the increase is greater than the power of the engine, the speed of the engine can be lowered, that is, the process of regulating the engine is completed.

[0098] In this embodiment, the engine of the vehicle can be regulated by the first regulating strategy. For example, Figure 3 is a schematic diagram of a regulating strategy according to an embodiment of the present application, as shown in Figure 3 , the allowable charging power of the high-voltage battery and the power of the high-voltage accessories are adjusted by increasing the power of the generator, so that the speed of the engine can be adjusted.

[0099] In this embodiment, the engine of the vehicle can be regulated by the second regulating strategy. For example, Figure 4 is a schematic diagram of another regulating strategy according to an embodiment of the present application, as shown in Figure 4 , the power of the engine is corrected by increasing the power of the generator, and the speed of the engine is adjusted according to the corrected power of the engine.

[0100] In this embodiment, after obtaining the power information of the high-voltage battery, the engine, the generator and the high-voltage accessories, the difference between the actual speed of the engine and the target speed of the engine is calculated, and it is judged whether the difference is greater than n △0 . If the difference is greater than n △0 , it is judged whether the difference is greater than n △1 . If the difference is greater than n △1 , the second regulating strategy is activated, and the power of the high-voltage accessories is corrected, and if the difference is less than or equal to n △1 , the first regulating strategy is activated, and the maximum power capability of the engine is corrected, so that the purpose that the size of the motor regulating power is not directly affected by the allowable power capability of the high-voltage battery is achieved, the technical problem that the speed of the engine cannot be adjusted by the motor due to the insufficient allowable power capability of the high-voltage battery is solved, and the technical effect that the speed of the engine can be adjusted by the motor is achieved.

[0101] Embodiment 3

[0102] According to an embodiment of the present application, a regulating device for an engine of a vehicle is also provided. It should be noted that the regulating device for the engine of the vehicle can be used to execute the regulating method for the engine of the vehicle in embodiment 1.

[0103] Figure 5is a schematic diagram of a speed regulation device of an engine of a vehicle according to an embodiment of the present application. As shown in Figure 5 The speed regulation device 500 of the engine of the vehicle can include an obtaining unit 501, a first determining unit 502, a second determining unit 503 and an adjusting unit 504.

[0104] The obtaining unit 501 is configured to obtain a current speed of the engine of the vehicle.

[0105] The first determining unit 502 is configured to determine a speed regulation strategy of the engine based on the current speed and a target speed of the engine, wherein the speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among an output power of an accessory of the vehicle, the current speed and the target speed.

[0106] The second determining unit 503 is configured to determine a first output power of a generator of the vehicle based on the speed regulation strategy.

[0107] The adjusting unit 504 is configured to adjust the speed of the engine from the current speed to the target speed based on the first output power and a second output power of the engine, wherein the first output power is used to represent a power generation power of the generator in a unit time, and the second output power is used to represent an output power of the engine in a unit time.

[0108] Optionally, the first determining unit 502 can include a first determining module configured to determine a first speed difference between the current speed and the target speed, and a second determining module configured to determine the speed regulation strategy based on the first speed difference.

[0109] Optionally, the second determining module can include a first determining sub-module configured to determine the speed regulation strategy as a first speed regulation strategy in response to the first speed difference being greater than a first threshold value and less than or equal to a second threshold value, wherein the first threshold value is less than the second threshold value, and the first speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among a third output power of an accessory of the vehicle, the current speed and the target speed, and a second determining sub-module configured to determine the speed regulation strategy as a second speed regulation strategy in response to the first speed difference being greater than the second threshold value, wherein the second speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among the first output power, the current speed and the target speed.

[0110] Optionally, the second determining unit 503 can comprise: a third determining module, configured to, in response to the speed regulation strategy being a first speed regulation strategy, determine a first output power from a remaining output power of the second output power except for a third output power of an accessory of the vehicle, a fourth output power of a driving motor of the vehicle and a fifth output power of a battery of the vehicle, wherein the first speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among the third output power of the accessory of the vehicle, the current speed and the target speed; and a fourth determining module, configured to, in response to the speed regulation strategy being a second speed regulation strategy, determine a coefficient of a second speed difference between the current speed and the target speed, and determine the first output power based on at least the coefficient and the target speed regulation power, wherein the second speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among the first output power, the current speed and the target speed.

[0111] Optionally, the fourth determining module can comprise: a third determining submodule, configured to determine a first output power threshold of the generator; a difference calculating submodule, configured to calculate a difference between the first output power threshold and a product of the coefficient and the target speed regulation power, to obtain a difference between the first output power threshold and the product; and a fourth determining submodule, configured to determine the first output power as the difference.

[0112] Optionally, the adjusting unit 504 can comprise: an adjusting module, configured to, in response to the first output power being greater than the second output power, adjust the speed of the engine from the current speed to the target speed.

[0113] Optionally, the speed regulation device 500 of the engine of the vehicle can further comprise: a responding unit, configured to, in response to the first output power being less than or equal to the second output power, adjust the first output power, so as to, in a case that the adjusted first output power is greater than the second output power, adjust the speed of the engine from the current speed to the target speed.

[0114] Optionally, the obtaining unit 501 can comprise: a monitoring module, configured to monitor a signal of the engine to obtain a monitoring result; and an extracting module, configured to extract the current speed from the monitoring result.

[0115] In this embodiment, the obtaining unit is configured to obtain a current rotating speed of an engine of the vehicle; the first determining unit is configured to determine a speed regulation strategy of the engine based on the current rotating speed and a target rotating speed of the engine, wherein the speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among an output power of an equipment of the vehicle, the current rotating speed and the target rotating speed; the second determining unit is configured to determine a first output power of a generator of the vehicle based on the speed regulation strategy; and the adjusting unit is configured to adjust the rotating speed of the engine from the current rotating speed to the target rotating speed based on the first output power and a second output power of the engine, wherein the first output power is used to represent a power generation power of the generator in a unit time, and the second output power is used to represent an output power of the engine in a unit time, so that the purpose that the size of the motor speed regulation power can be avoided from being directly affected by the allowable power capacity of the high-voltage battery is achieved, the technical problem that the rotating speed of the engine cannot be adjusted by the motor due to the insufficient allowable power capacity of the high-voltage battery is solved, and the technical effect that the rotating speed of the engine can be adjusted by the motor is achieved.

[0116] Embodiment 4

[0117] According to the embodiments of the present application, a processor is further provided, which is used to run a program, wherein the program is run by the processor to execute the speed regulation method of the engine of the vehicle in each embodiment.

[0118] Embodiment 5

[0119] According to the embodiments of the present application, an electronic device is further provided, which comprises a memory storing an executable program and a processor used to run the program, wherein the program is run to execute the speed regulation method of the engine of the vehicle in each embodiment.

[0120] Embodiment 6

[0121] According to another aspect of the embodiments of the present application, a computer readable storage medium is further provided. The computer readable storage medium comprises a stored program, wherein the program is run to control a device where the computer readable storage medium is located to execute the speed regulation method of the engine of the vehicle in each embodiment.

[0122] Embodiment 7

[0123] According to the embodiments of the present application, a computer program product is further provided, which comprises a computer program, wherein the computer program is run by a processor to implement the speed regulation method of the engine of the vehicle in each embodiment.

[0124] Embodiment 8

[0125] According to the embodiment of the present application, a computer program product is also provided, comprising a nonvolatile computer readable storage medium, the nonvolatile computer readable storage medium is used to store a computer program, the computer program is executed by a processor to implement the speed regulation method of the engine of the vehicle in each embodiment.

[0126] Embodiment 9

[0127] According to the embodiment of the present application, a computer program is also provided, the computer program is executed by a processor to implement the speed regulation method of the engine of the vehicle in each embodiment.

[0128] The above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0129] In the above-mentioned embodiments of the present application, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0130] In several embodiments provided in the present application, it should be understood that the disclosed technical contents can be implemented by other ways. Among them, the above-mentioned device embodiments are only schematic, for example, the division of units can be a logical function division, and actual implementation can have another division way, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or modules shown or discussed can be indirect coupling or communication connection through some interfaces, units or modules, which can be electrical or other forms.

[0131] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the present embodiment.

[0132] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be realized in the form of hardware or in the form of software functional unit.

[0133] If the integrated unit is implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application or the part that contributes to the related art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The aforementioned storage medium includes a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0134] The above is only the preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A method of regulating the speed of an engine of a vehicle, characterized by, The method comprises: obtaining a current speed of an engine of a vehicle; determining a speed regulation strategy of the engine based on the current speed and a target speed of the engine, wherein the speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among an output power of an accessory of the vehicle, the current speed and the target speed; determining a first output power of a generator of the vehicle based on the speed regulation strategy; adjusting a speed of the engine from the current speed to the target speed based on the first output power and a second output power of the engine, wherein the first output power is used to represent a power generation power of the generator in a unit time, and the second output power is used to represent an output power of the engine in the unit time; wherein the determining of the speed regulation strategy of the engine based on the current speed and the target speed of the engine comprises: determining a first speed difference between the current speed and the target speed; in response to the first speed difference being greater than a first threshold value and less than or equal to a second threshold value, determining the speed regulation strategy as a first speed regulation strategy, wherein the first threshold value is less than the second threshold value, and the first speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among a third output power of an accessory of the vehicle, the current speed and the target speed; and in response to the first speed difference being greater than the second threshold value, determining the speed regulation strategy as a second speed regulation strategy, wherein the second speed regulation strategy is used to represent a rule of regulating the engine according to a mapping relationship among the first output power, the current speed and the target speed.

2. The method of claim 1, wherein, The determining of the first output power of the generator of the vehicle based on the speed regulation strategy comprises: in response to the speed regulation strategy being the first speed regulation strategy, determining a remaining output power of the second output power except for a third output power of an accessory of the vehicle, a fourth output power of a drive motor of the vehicle and a fifth output power of a battery of the vehicle as the first output power; in response to the speed regulation strategy being the second speed regulation strategy, determining a coefficient of a second speed difference between the current speed and the target speed, and determining the first output power based on at least the coefficient and a target speed regulation power.

3. The method of claim 2, wherein, The determining of the first output power based on at least the coefficient and the target speed regulation power comprises: determining a first output power threshold value of the generator; performing a difference calculation on the first output power threshold value and a product between the coefficient and the target speed regulation power to obtain a difference between the first output power threshold value and the product value; determining the difference as the first output power.

4. The method of claim 1, wherein, The adjusting of the speed of the engine from the current speed to the target speed based on the first output power and the second output power of the engine comprises: in response to the first output power being greater than the second output power, adjusting the speed of the engine from the current speed to the target speed.

5. The method of claim 1, wherein, The method further comprises: In response to the first output power being less than or equal to the second output power, the first output power is adjusted, so that in the case that the adjusted first output power is greater than the second output power, the engine speed is adjusted from the current speed to the target speed.

6. The method according to any one of claims 1 to 5, characterized in that, Obtaining a current speed of an engine of a vehicle, comprising: Monitoring a signal of the engine to obtain a monitoring result; Extracting a speed from the monitoring result to obtain the current speed.

7. A speed regulating device of an engine of a vehicle, characterized by Comprising: An obtaining unit configured to obtain a current speed of an engine of a vehicle; A first determining unit configured to determine a speed regulation strategy of the engine based on the current speed and a target speed of the engine, wherein the speed regulation strategy is used to represent a rule of regulating the speed of the engine according to a mapping relationship among an output power of a device of the vehicle, the current speed and the target speed; A second determining unit configured to determine a first output power of a generator of the vehicle based on the speed regulation strategy; An adjusting unit configured to adjust the speed of the engine from the current speed to the target speed based on the first output power and a second output power of the engine, wherein the first output power is used to represent a power generation power of the generator in a unit time, and the second output power is used to represent an output power of the engine in the unit time; The first determining unit is configured to determine the speed regulation strategy of the engine based on the current speed and the target speed of the engine by performing the following steps: determining a first speed difference between the current speed and the target speed; in response to the first speed difference being greater than a first threshold value and less than or equal to a second threshold value, determining the speed regulation strategy as a first speed regulation strategy, wherein the first threshold value is less than the second threshold value, and the first speed regulation strategy is used to represent a rule of regulating the speed of the engine according to a mapping relationship among a third output power of an accessory of the vehicle, the current speed and the target speed; and in response to the first speed difference being greater than the second threshold value, determining the speed regulation strategy as a second speed regulation strategy, wherein the second speed regulation strategy is used to represent a rule of regulating the speed of the engine according to a mapping relationship among the first output power, the current speed and the target speed.

8. A processor, comprising: The processor is configured to run a program, wherein the program, when run by the processor, executes the speed regulation method of the engine of the vehicle of any one of claims 1 to 6.

9. An electronic device, comprising: Comprising: A memory storing an executable program; A processor configured to run the program, wherein the program, when run, executes the speed regulation method of the engine of the vehicle of any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium comprises a stored executable program, wherein the executable program, when run, controls a device where the storage medium is located to execute the speed regulation method of the engine of the vehicle of any one of claims 1 to 6.

11. A computer program product comprising a computer program, characterized in that, The computer program, when executed by a processor, implements the speed regulation method of the engine of the vehicle of any one of claims 1 to 6.

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