WO2023050688A1

WO2023050688A1 - Method and apparatus for controlling power system of hybrid electric vehicle, device, and medium

Info

Publication number: WO2023050688A1
Application number: PCT/CN2022/077068
Authority: WO
Inventors: 唐为义; 周重光; 赵天恩
Original assignee: 奇瑞汽车股份有限公司
Priority date: 2021-09-29
Filing date: 2022-02-21
Publication date: 2023-04-06
Also published as: CN113844431A; CN113844431B

Abstract

A method for controlling a power system of a hybrid electric vehicle, belonging to the field of vehicle safety control. The method comprises: acquiring the charge of a battery in a power system; in response to determining that the charge is less than a first charge threshold, acquiring an engine coolant temperature and a natural gas cylinder pressure; and, according to the engine coolant temperature and the natural gas cylinder pressure, controlling the power system to operate in a natural gas mode or a gasoline mode. In the described method, when the charge of a battery is insufficient, the power system of the hybrid electric vehicle is controlled to operate in a natural gas mode or a gasoline mode, thereby reducing the exhaust emission of the hybrid electric vehicle during use. Further disclosed are an apparatus for controlling a power system of a hybrid electric vehicle, a computer device, a computer-readable medium, and a computer program product.

Description

Power system control method, device, device and medium of hybrid electric vehicle

This application claims the priority of the Chinese patent application with application number 202111150397.9 and titled "Power System Control Method, Device, Device and Medium for Hybrid Vehicle" filed on September 29, 2021, the entire contents of which are incorporated by reference in this application.

technical field

The present disclosure relates to the technical field of automobiles, in particular to a method, device, device and medium for controlling a power system of a hybrid electric vehicle.

Background technique

A hybrid vehicle is a vehicle whose power system is composed of two or more single drive systems that can operate simultaneously. For example, the power system of a hybrid car includes a battery and an engine. The vehicle control unit can control the power system to operate in different power modes according to the running state of the hybrid vehicle, so as to provide power for starting or driving the hybrid vehicle.

Contents of the invention

Embodiments of the present disclosure provide a method, device, device and medium for controlling a power system of a hybrid electric vehicle.

In a first aspect, a method for controlling a power system of a hybrid electric vehicle is provided, the method comprising: obtaining the electric quantity of a battery in the power system; in response to determining that the electric quantity is less than a first electric quantity threshold value, obtaining engine coolant temperature and a gas cylinder Pressure: According to the temperature of the engine coolant and the pressure of the gas cylinder, control the power system to run in natural gas mode or gasoline mode.

Optionally, the controlling the power system to operate in natural gas mode or gasoline mode according to the engine coolant temperature and the gas cylinder pressure includes: in response to determining that the engine coolant temperature is greater than or equal to a temperature threshold and the If the pressure of the natural gas cylinder is greater than or equal to a pressure threshold, the power system is controlled to operate in the natural gas mode; or, in response to determining that the engine coolant temperature is less than a temperature threshold or the pressure of the natural gas cylinder is less than a pressure threshold, control the power system Run the petrol mode.

Optionally, the method further includes: after controlling the power system to the natural gas mode, controlling the engine to charge the battery until the power of the battery is greater than or equal to the first power threshold; The powertrain described above operates in battery mode.

Optionally, the method further includes: after controlling the power system to run the gasoline mode, in response to determining that the engine coolant temperature is greater than or equal to the temperature threshold and the gas cylinder pressure is greater than the pressure threshold Controlling the power system to run the natural gas mode; controlling the engine to charge the battery until the power of the battery is greater than or equal to the first power threshold; controlling the power system to run the battery mode.

Optionally, the method further includes: after controlling the power system to run the gasoline mode, controlling the engine to charge the battery until the power of the battery is greater than or equal to the first power threshold; The powertrain is controlled to operate in a battery mode.

Optionally, the method further includes: in response to determining that the power level is greater than or equal to the first power level threshold, controlling the power system to operate in a battery mode.

In a second aspect, a power system control device of a hybrid electric vehicle is provided, the device comprising: a first acquisition module, configured to acquire the power of the battery in the power system; a second acquisition module, used to determine the power in response to The temperature of the engine coolant and the pressure of the natural gas cylinder are obtained if it is less than the first power threshold; the control module is configured to control the power system to operate in natural gas mode or gasoline mode according to the temperature of the engine coolant and the pressure of the natural gas cylinder.

Optionally, the control module is configured to control the power system to operate the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to a temperature threshold and the pressure of the natural gas cylinder is greater than or equal to a pressure threshold; or, in response to When it is determined that the temperature of the engine coolant is lower than a temperature threshold or the pressure of the gas cylinder is lower than a pressure threshold, the power system is controlled to operate in the gasoline mode.

Optionally, the control module is further configured to control the engine to charge the battery after controlling the power system to run the natural gas mode until the power of the battery is greater than or equal to the first power threshold; The powertrain operates in battery mode.

Optionally, the control module is further configured to, when controlling the power system to operate in the natural gas mode, control the engine to charge the battery until the power of the battery is greater than or equal to a second power threshold and less than the set the first power threshold; and control the power battery system to operate in the battery mode and the natural gas mode.

Optionally, the control module is further configured to respond to determining that the engine coolant temperature is greater than or equal to the temperature threshold and the gas cylinder pressure is greater than the pressure after controlling the power system to run the gasoline mode Threshold, control the power system to run the natural gas mode; control the engine to charge the battery until the power of the battery is greater than or equal to the first power threshold; control the power system to run the battery mode.

Optionally, the control module is further configured to control the engine to charge the battery after controlling the power system to operate in the gasoline mode until the power of the battery is greater than or equal to the first power threshold ; Control the power system to operate in battery mode.

Optionally, the control module is further configured to, after controlling the power system to be in the gasoline mode, control the engine to charge the battery until the power of the battery is greater than or equal to a second power threshold and is less than the first power threshold; controlling the power system to operate in battery mode and gasoline mode.

Optionally, the control module is further configured to, in response to determining that the electric quantity is greater than or equal to the first electric quantity threshold, control the power system to operate in a battery mode.

In a third aspect, a computer device is provided, including: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to execute the method described in the first aspect.

In a fourth aspect, a computer-readable medium is provided. When instructions in the computer-readable medium are executed by a processor of the computer device, the computer device can execute the method described in the first aspect.

A fifth aspect provides a computer program product, including computer programs/instructions, wherein the computer program/instructions implement the method described in the first aspect when executed by a processor.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a flowchart of a method for controlling a power system of a hybrid electric vehicle provided by an embodiment of the present disclosure;

Fig. 2 is a flow chart of another power system control method of a hybrid electric vehicle provided by an embodiment of the present disclosure;

Fig. 3 is a flow chart of another hybrid electric vehicle power system control method provided by an embodiment of the present disclosure;

Fig. 4 is a flow chart of another power system control method of a hybrid electric vehicle provided by an embodiment of the present disclosure;

Fig. 5 is a flow chart of another power system control method of a hybrid electric vehicle provided by an embodiment of the present disclosure;

Fig. 6 is a structural block diagram of a power system control device of a hybrid electric vehicle provided by an embodiment of the present disclosure;

Fig. 7 is a structural block diagram of a computer device provided by an embodiment of the present disclosure.

Detailed ways

In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

In the embodiment of the present disclosure, the power system of the hybrid electric vehicle includes a battery and an engine. The powertrain has battery mode, natural gas mode and gasoline mode. Exemplarily, the hybrid vehicle may be a plug-in hybrid vehicle and a gasoline-electric hybrid vehicle.

Among them, the battery mode is also called the pure electric mode, which means that the power system provides power for the hybrid vehicle through the battery.

Natural gas mode and gasoline mode are engine operating modes. Natural gas mode refers to the powertrain that burns natural gas through the engine to power the hybrid vehicle. In some examples, the natural gas may be CNG (Compressed Natural Gas), which is natural gas in gaseous form; in other examples, the natural gas may be LNG (Liquefied Natural Gas, liquefied natural gas), which is natural gas in liquid form . Gasoline mode refers to the powertrain that burns gasoline through the engine to power the hybrid vehicle.

In the related art, the power system control method of a hybrid electric vehicle includes: controlling the power system to run in natural gas mode or gasoline mode; receiving a command signal to change the power system; in response to the command signal, switching the natural gas mode to gasoline mode or switching the gasoline mode to Natural gas mode, which controls the powertrain to run in battery mode during the switchover.

Since the power system only operates in battery mode when switching from natural gas mode to gasoline mode or from gasoline mode to natural gas mode, and operates in natural gas mode or gasoline mode most of the time, the exhaust emissions are high.

Fig. 1 is a flow chart of a method for controlling a power system of a hybrid electric vehicle provided by an embodiment of the present disclosure, the method may be executed by a vehicle controller, and is used to control the operation of the power system when the hybrid electric vehicle is started or running model. Referring to Figure 1, the method includes:

In step 101, the electric quantity of the battery in the power system is obtained.

In the embodiment of the present disclosure, the vehicle controller periodically acquires the battery power to determine whether the hybrid electric vehicle can operate in the battery mode according to the battery power.

Exemplarily, the vehicle controller can communicate with the BMS (Battery Management System, battery management system) through the vehicle CAN (Controller Area Network, controller area network) to obtain the battery power.

In step 102, in response to determining that the electric quantity of the battery is less than a first electric quantity threshold, the temperature of the engine coolant and the pressure of the gas cylinder are obtained.

The first electric quantity threshold represents the minimum electric quantity value that the battery can provide power for the hybrid electric vehicle, and the first electric quantity threshold is determined by relevant technicians according to experiments, and then stored in the vehicle controller. When the electric quantity of the battery is greater than or equal to the first electric quantity threshold, it means that the power system satisfies the operation condition of the battery mode, that is, the electric quantity of the battery can provide power for the hybrid electric vehicle. When the battery power is less than the first power threshold, it means that the power system does not meet the battery mode operation condition, that is, the battery power is not enough to provide power for the hybrid electric vehicle.

In the embodiment of the present disclosure, the vehicle controller periodically obtains the temperature of the engine coolant and the pressure of the gas cylinder. In some embodiments, a temperature sensor is provided inside the engine for detecting the temperature of the engine coolant, and the vehicle controller can obtain the temperature of the engine coolant through the temperature sensor. A pressure sensor is arranged inside the gas cylinder to detect the pressure inside the gas cylinder, and the vehicle controller can obtain the pressure of the gas cylinder through the pressure sensor.

In step 103, the power system is controlled to operate in a natural gas mode or a gasoline mode according to the temperature of the engine coolant and the pressure of the gas cylinder.

In the embodiment of the present disclosure, when the power system does not meet the operation conditions of the battery mode, the operation mode of the power system is controlled according to the temperature of the engine coolant and the pressure of the gas cylinder.

In some embodiments, step 103 includes: in response to determining that the engine coolant temperature is greater than or equal to a temperature threshold and the pressure of the natural gas cylinder is greater than or equal to the pressure threshold, controlling the power system to operate in a natural gas mode.

In other embodiments, step 103 includes: in response to determining that the engine coolant temperature is lower than the temperature threshold or the gas cylinder pressure is lower than the pressure threshold, controlling the power system to run in the gasoline mode.

Wherein, the temperature threshold represents the lowest temperature value that can make the natural gas fully combustible. When the engine coolant temperature is lower than the temperature threshold, the natural gas cannot be combusted because the temperature is too low; or it cannot be fully combusted because of the low temperature, resulting in an increase in exhaust emissions.

The pressure threshold represents the minimum pressure value at which the powertrain can operate in natural gas mode. The pressure of the gas cylinder can reflect the remaining amount of natural gas in the gas cylinder. The higher the pressure of the gas cylinder, the higher the remaining natural gas; the lower the pressure of the natural gas cylinder, the lower the remaining natural gas.

Exemplarily, the temperature threshold and the pressure threshold are determined by relevant technicians according to experiments, and then stored in the storage unit of the vehicle controller.

When the engine coolant temperature is greater than or equal to the temperature threshold and the gas cylinder pressure is greater than or equal to the pressure threshold, it means that the power system meets the operating conditions of the natural gas mode. At this point, the control powertrain operates in natural gas mode. Since the exhaust emissions of engines burning natural gas are smaller than those of engines burning gasoline, when the power system does not meet the operating conditions of battery mode, controlling the power system to operate in natural gas mode can reduce exhaust emissions to a certain extent.

The engine coolant temperature is lower than the temperature threshold or the gas cylinder pressure is lower than the pressure threshold, including the following three situations: the engine coolant temperature is lower than the temperature threshold, the gas cylinder pressure is greater than or equal to the pressure threshold; the engine coolant temperature is greater than or equal to the temperature threshold, and the gas cylinder pressure Less than the pressure threshold; the engine coolant temperature is less than the temperature threshold, and the gas cylinder pressure is less than the pressure threshold. When any of the three conditions is met, it means that the power system does not meet the operating conditions of the natural gas mode. At this point, the powertrain is controlled to operate in gasoline mode. That is, the power system is controlled to operate in the gasoline mode only when the operating conditions of the battery mode and the operating conditions of the natural gas mode are not met.

In the embodiment of the present disclosure, the power system of the hybrid electric vehicle has a battery mode, a natural gas mode and a gasoline mode. In response to determining that the electric quantity of the battery is less than the first electric quantity threshold, the temperature of the engine coolant and the pressure of the natural gas cylinder are obtained; according to the temperature of the engine coolant and the pressure of the natural gas cylinder, the power system is controlled to operate in a natural gas mode or a gasoline mode. That is, in the embodiment of the present disclosure, when the power of the battery is insufficient, the power system of the hybrid electric vehicle is controlled to operate in the natural gas mode or the gasoline mode. Since the exhaust emission of the battery mode is 0, which is less than the exhaust emission of the natural gas mode and the exhaust emission of gasoline, therefore, the power system control method provided by the embodiment of the present disclosure can reduce the exhaust emission of the hybrid vehicle during use quantity.

Optionally, in the embodiment of the present disclosure, the power system control method of a hybrid electric vehicle further includes: after controlling the power system to run in the natural gas mode, controlling the engine to charge the battery until the power of the battery is greater than or equal to the first Power threshold; control the power system to run in battery mode.

Since the exhaust emission in the battery mode is 0, the power system charges the battery in the natural gas mode after running the natural gas mode. When the power system meets the operating conditions of the battery mode again, controlling the power system to operate in the battery mode can further reduce the exhaust emission of the hybrid electric vehicle during operation.

Optionally, in an embodiment of the present disclosure, the power system control method of a hybrid electric vehicle further includes: after controlling the power system to run in gasoline mode, in response to determining that the engine coolant temperature is greater than or equal to a temperature threshold and the gas cylinder pressure is greater than a pressure threshold, Control the power system to run in natural gas mode; control the engine to charge the battery until the power of the battery is greater than or equal to the first power threshold; control the power system to run in battery mode.

Since the exhaust emission in the battery mode is 0, and the exhaust emission in the natural gas mode is smaller than that in the gasoline mode. After running the gasoline mode, if the power system meets the operating conditions of the natural gas mode, the power system is controlled to run the natural gas mode, and the battery is charged in the natural gas mode. When the power system meets the operating conditions of the battery mode again, controlling the power system to operate in the battery mode can further reduce the exhaust emission of the hybrid electric vehicle during operation.

Optionally, in the embodiment of the present disclosure, the power system control method of a hybrid electric vehicle further includes: after controlling the power system to run in gasoline mode, controlling the engine to charge the battery until the power of the battery is greater than or equal to the first Power threshold; control the power system to run in battery mode.

Since the exhaust emission in the battery mode is 0, the power system charges the battery in the gasoline mode after running the gasoline mode. When the power system meets the operating conditions of the battery mode again, controlling the power system to operate in the battery mode can further reduce the exhaust emission of the hybrid electric vehicle during operation.

Fig. 2 is a flow chart of a method for controlling a power system of a hybrid electric vehicle provided by an embodiment of the present disclosure. The method may be executed by a vehicle controller to control the power system to provide power during the start-up process of the hybrid electric vehicle. Referring to Figure 2, the method includes:

In step 201, the electric quantity of the battery in the power system is obtained.

For the related content of obtaining the battery power, refer to the aforementioned step 101, and the detailed description is omitted here.

In step 202, it is determined whether the electric quantity is greater than or equal to a first electric quantity threshold. If the power is greater than or equal to the first power threshold, step 205 is executed. If the power is less than the first power threshold, step 203 is performed.

For the relevant content of the first power threshold, refer to the foregoing step 102, and a detailed description is omitted here.

When the power of the battery is greater than or equal to the first power threshold, it means that the power system meets the operating conditions of the battery mode, and the power of the battery is enough to start the hybrid vehicle. When the power of the battery is less than the first power threshold, it means that the power system does not meet the operating conditions of the battery mode, and the power of the battery is not enough to start the hybrid vehicle.

In step 203, the temperature of the engine coolant and the pressure of the natural gas cylinder are obtained.

For the related content of obtaining the temperature of the engine coolant and the pressure of the gas cylinder, refer to the aforementioned step 102, and the detailed description is omitted here.

In step 204, it is judged whether the temperature of the engine coolant is greater than or equal to the temperature threshold and whether the pressure of the gas cylinder is greater than or equal to the pressure threshold. If the temperature of the engine coolant is greater than or equal to the temperature threshold and the pressure of the gas cylinder is greater than or equal to the pressure threshold, step 206 is executed. If the temperature of the engine coolant is lower than the temperature threshold or the pressure of the gas cylinder is lower than the pressure threshold, step 207 is executed.

When the temperature of the engine coolant is greater than or equal to the temperature threshold and the pressure of the gas cylinder is greater than or equal to the pressure threshold, it means that the power system meets the operating conditions of the natural gas mode, and the power system can be controlled to operate in the natural gas mode to start the hybrid vehicle.

When the engine coolant temperature is lower than the temperature threshold or the gas cylinder pressure is lower than the pressure threshold, it means that the power system does not meet the operating conditions of the natural gas mode. At this time, the power system can be controlled to run in gasoline mode to start the hybrid vehicle. For the temperature threshold, the pressure threshold, and the temperature of the engine coolant being lower than the temperature threshold or the gas cylinder pressure being lower than the pressure threshold, please refer to the aforementioned step 103, and the detailed description is omitted here.

In step 205, the power system is controlled to operate in battery mode.

In step 206, the power system is controlled to operate in natural gas mode.

In step 207, the power system is controlled to operate in gasoline mode.

In the embodiment of the present disclosure, during the start-up process of the hybrid electric vehicle, when the power system meets the battery mode operating conditions, the power system is controlled to operate in the battery mode to start the hybrid electric vehicle; when the power system does not meet the battery mode operating conditions, and the power system When the operating conditions of the natural gas mode are met, the power system is controlled to run the natural gas mode to start the hybrid vehicle; when the power system does not meet the battery mode operating conditions and the natural gas mode operating conditions are not met, the power system is controlled to run the gasoline mode to start the hybrid vehicle . That is, in the embodiments of the present disclosure, the power system is controlled to provide power during the start-up process of the hybrid electric vehicle according to the order of priority that the battery mode is greater than the natural gas mode, and the natural gas mode is greater than the gasoline mode. Since the battery mode has zero exhaust emissions, and the exhaust emissions in the natural gas mode are smaller than those in the gasoline mode, the exhaust emissions of the hybrid vehicle during start-up can be reduced according to the above power system control method.

Fig. 3 is a flow chart of a method for controlling a power system of a hybrid electric vehicle provided by an embodiment of the present disclosure, the method may be executed by a vehicle controller, and is used to control the operation mode of the power system after the hybrid electric vehicle is started in gasoline mode . Referring to Figure 3, the method includes:

In step 301, the power system is controlled to operate in gasoline mode.

It can be seen from the embodiment shown in FIG. 2 that only when the power system does not meet the operating conditions of the battery mode and the natural gas mode, the power system is controlled to run the gasoline mode to start the hybrid vehicle. Therefore, in the embodiment of the present disclosure, after the hybrid electric vehicle is started in the gasoline mode, the power system is controlled to operate in the gasoline mode to provide running power for the hybrid electric vehicle.

In step 302, the powertrain is controlled to charge the battery.

The battery can be recharged from the engine when the powertrain is running in both natural gas and gasoline modes.

In step 303, the electric quantity of the battery, the temperature of the engine coolant and the pressure of the gas cylinder are obtained.

Please refer to the aforementioned step 101 for the relevant content of obtaining the electric quantity of the battery, and refer to the foregoing step 102 for the relevant content of obtaining the temperature of the engine coolant and the pressure of the gas cylinder, and the detailed description is omitted here.

In step 304, it is judged whether the power of the battery is greater than or equal to a first power threshold. If the power of the battery is greater than or equal to the first power threshold, it means that the power system meets the battery mode operation condition, and then execute step 307; if the battery power is less than the first power threshold, it means that the power system does not meet the battery mode operation condition, and then go to step 305.

Optionally, in the embodiment of the present disclosure, step 304 may also be replaced by:

In step 3041, it is judged whether the power of the battery is greater than or equal to the first power threshold. If the power of the battery is greater than or equal to the first power threshold, execute step 307; if the power of the battery is less than the first power threshold, execute step 3042.

In step 3042, it is judged whether the electric quantity of the battery is greater than or equal to the second electric quantity threshold and less than the first electric quantity threshold. If the power of the battery is greater than or equal to the second power threshold and less than the first power threshold, perform step 3043; if the battery power is less than the second power threshold, then perform step 305.

The second power threshold is smaller than the first power threshold. When the battery provides power with an electric quantity greater than or equal to the second electric quantity threshold and less than the first electric quantity threshold, the service life of the battery will not be damaged. Exemplarily, the second power threshold is set by a person skilled in the art according to actual needs.

In step 3043, the power system is controlled to operate in a hybrid mode. Then, execute step 3041 .

Hybrid modes include battery mode and natural gas mode, or battery mode and gasoline mode. When the power of the battery is greater than or equal to the second power threshold and less than the first power threshold, the power system is controlled to run the battery mode and the natural gas mode simultaneously or the power system is controlled to run the battery mode and the gasoline mode simultaneously.

In step 3043, if the natural gas mode is used to charge the battery in step 302, the power system is controlled to run the battery mode and the natural gas mode at the same time; if the battery is charged by the gasoline mode in step 302, the power system is controlled to run the battery mode and the gasoline mode . In this way, it is possible to further reduce the exhaust emission of the power system running in natural gas mode alone or the power battery system running in gasoline mode alone.

In step 305, it is judged whether the temperature of the engine coolant is greater than or equal to the temperature threshold and whether the pressure of the gas cylinder is greater than or equal to the pressure threshold. If the temperature of the engine coolant is greater than or equal to the temperature threshold and the pressure of the natural gas cylinder is greater than or equal to the pressure threshold, it means that the power system meets the operating conditions of the natural gas mode, and step 306 is executed. If the temperature of the engine coolant is lower than the temperature threshold or the pressure of the gas cylinder is lower than the pressure threshold, it means that the power system does not meet the operating conditions of the natural gas mode, and step 301 is executed.

For the relevant content of the temperature threshold and the pressure threshold, refer to the aforementioned step 103, and the detailed description is omitted here.

In step 306, the power system is controlled to operate in the natural gas mode, and then step 302 is executed.

In step 306, when the power system is running in gasoline mode, if the power system meets the operating conditions of natural gas mode, the power system is controlled to run in natural gas mode, which can reduce exhaust emissions and fuel consumption.

In step 307 the power system is controlled to operate in battery mode.

Optionally, when the hybrid electric vehicle needs to consume a lot of energy during operation, for example, when the operating condition of the hybrid electric vehicle meets any one of climbing, acceleration, etc., the power system can also be controlled in step 307. For the hybrid mode, for the relevant content of the hybrid mode, refer to the aforementioned step 3043 , and the detailed description is omitted here.

In the embodiment of the present disclosure, when the hybrid electric vehicle is started in gasoline mode, the battery is charged. If the power system meets the operating conditions of the battery mode during the operation of the hybrid electric vehicle, the power system is controlled to operate in the battery mode. If the power system does not meet the operating conditions of the battery mode and meets the operating conditions of the natural gas mode, the power system is controlled to operate in the natural gas mode, and the battery is charged in the natural gas mode. The power system is controlled to operate in the battery mode until the power system satisfies the battery mode operation condition again. That is, in the embodiments of the present disclosure, the power system is controlled to provide power according to the order of priority that the battery mode is greater than the natural gas mode, and the natural gas mode is greater than the gasoline mode. Since the battery mode has zero exhaust emissions and the exhaust emissions in the natural gas mode are smaller than those in the gasoline mode, the exhaust emissions of the hybrid vehicle during operation can be further reduced according to the above power system control method.

Fig. 4 is a flow chart of a method for controlling a power system of a hybrid electric vehicle provided by an embodiment of the present disclosure, the method may be executed by a vehicle controller, and is used to control the operation mode of the power system after the hybrid electric vehicle is started in natural gas mode . Referring to Figure 4, the method includes:

In step 401, the power system is controlled to operate in natural gas mode.

It can be seen from the embodiment shown in FIG. 2 that when the power system does not meet the operating conditions of the battery mode, the power system is controlled to operate in the natural gas mode to start the hybrid vehicle. Therefore, in the embodiment of the present disclosure, after the hybrid electric vehicle is started in the natural gas mode, the power system is controlled to operate in the natural gas mode to provide operating power for the hybrid electric vehicle.

In step 402, the powertrain is controlled to charge the battery.

The battery is charged by the engine when the powertrain is operating in natural gas mode and gasoline mode.

In step 403, the electric quantity of the battery, the temperature of the engine coolant and the pressure of the gas cylinder are obtained.

In step 404, it is judged whether the power of the battery is greater than or equal to a first power threshold. If the power of the battery is greater than or equal to the first power threshold, perform step 407; if the power of the battery is less than the first power threshold, perform step 405.

Optionally, in the embodiment of the present disclosure, step 404 may also be replaced by:

In step 4041, it is judged whether the power of the battery is greater than or equal to the first power threshold. If the power of the battery is greater than or equal to the first power threshold, perform step 407; if the power of the battery is less than the first power threshold, perform step 4042.

In step 4042, it is judged whether the electric quantity of the battery is greater than or equal to the second electric quantity threshold and less than the first electric quantity threshold. If the battery power is greater than or equal to the second power threshold and less than the first power threshold, perform step 4043; if the battery power is less than the second power threshold, perform step 405.

For the relevant content of the second power threshold, refer to the foregoing step 3042, and a detailed description is omitted here.

In step 4043, the power system is controlled to operate in a hybrid mode. Then, step 4041 is executed.

For the relevant content of the hybrid mode, refer to the aforementioned step 3043, and the detailed description is omitted here.

In step 4043, if the battery is charged by operating the natural gas mode in step 402, the power system is controlled to run the battery mode and the natural gas mode at the same time; if the battery is charged by the gasoline mode in step 402, the power system is controlled to run the battery mode and the gasoline mode . In this way, it is possible to further reduce the exhaust emission of the power system running in natural gas mode alone or the power battery system running in gasoline mode alone.

In step 405, it is judged whether the temperature of the engine coolant is greater than or equal to the temperature threshold and whether the pressure of the gas cylinder is greater than or equal to the pressure threshold. If the temperature of the engine coolant is greater than or equal to the temperature threshold and the pressure of the natural gas cylinder is greater than or equal to the pressure threshold, it means that the power system meets the operating conditions of the natural gas mode, and step 401 is executed. If the temperature of the engine coolant is lower than the temperature threshold or the pressure of the gas cylinder is lower than the pressure threshold, it means that the power system does not meet the operating conditions of the natural gas mode, and step 406 is executed.

In step 406, the power system is controlled to run in gasoline mode, and then step 402 is executed.

In step 407, the power system is controlled to operate in battery mode.

Optionally, when the hybrid electric vehicle needs to consume a lot of energy during operation, for example, when the operating condition of the hybrid electric vehicle satisfies any one of climbing, acceleration, etc., the power system can also be controlled in step 407. Hybrid mode. For the relevant content of the hybrid mode, refer to the aforementioned step 3043, and the detailed description is omitted here.

In the embodiment of the present disclosure, when the hybrid electric vehicle is started in the natural gas mode, the power system is controlled to operate in the natural gas mode, and the battery is charged in the natural gas mode. When the power system satisfies the operating condition of the battery mode, the power system is controlled to run in the battery mode. When the power system does not meet the operating conditions of the battery mode and the operating conditions of the natural gas mode, the power system is controlled to run in the gasoline mode. That is, in the embodiments of the present disclosure, the power system is controlled to provide power according to the order of priority that the battery mode is greater than the natural gas mode, and the natural gas mode is greater than the gasoline mode. Since the battery mode has zero exhaust emissions, and the exhaust emissions in the natural gas mode are smaller than those in the gasoline mode, the exhaust emissions of the hybrid vehicle during operation can be reduced according to the above power system control method.

Fig. 5 is a flow chart of a method for controlling a power system of a hybrid electric vehicle provided by an embodiment of the present disclosure, the method may be executed by a vehicle controller, and is used to control the operation mode of the power system after the hybrid electric vehicle is started in battery mode . Referring to Figure 5, the method includes:

In step 501, the power system is controlled to operate in battery mode.

In step 502, the electric quantity of the battery in the power system is obtained.

In step 503, it is judged whether the power of the battery is greater than or equal to a first power threshold. If the electric quantity of the battery is greater than or equal to the first electric quantity threshold, the power system satisfies the operating condition of the battery mode, and step 501 is executed. If the electric quantity of the battery is less than the first electric quantity threshold, the power system does not satisfy the operating condition of the battery mode, and step 504 is executed.

Optionally, in the embodiment of the present disclosure, step 503 may also be replaced by:

In step 5031, it is judged whether the power of the battery is greater than or equal to the first power threshold. If the power of the battery is greater than or equal to the first power threshold, perform step 501; if the power of the battery is less than the first power threshold, perform step 5032.

In step 5032, it is judged whether the electric quantity of the battery is greater than or equal to the second electric quantity threshold and less than the first electric quantity threshold. If the electric quantity of the battery is greater than or equal to the second electric quantity threshold and less than the first electric quantity threshold, execute step 5033; if the electric quantity of the battery is less than the second electric quantity threshold, execute step 504.

In step 5033, the power system is controlled to operate in a hybrid mode. Then, step 508 is executed.

In step 504, the temperature of the engine coolant and the pressure of the gas cylinder are obtained.

In step 505, it is judged whether the temperature of the engine coolant is greater than or equal to the temperature threshold and whether the pressure of the gas cylinder is greater than or equal to the pressure threshold. If the engine coolant temperature is greater than or equal to the temperature threshold and the gas cylinder pressure is greater than or equal to the pressure threshold, step 506 is executed. If the engine coolant temperature is lower than the temperature threshold or the gas cylinder pressure is lower than the pressure threshold, step 507 is executed.

In step 506, the powertrain is controlled to operate in natural gas mode.

In step 507, the power system is controlled to operate in gasoline mode.

In step 508, the powertrain is controlled to charge the battery.

When the powertrain is operating in natural gas mode, the battery is charged in natural gas mode; when the powertrain is operating in gasoline mode, the battery is charged in gasoline mode.

In step 509, the electric quantity of the battery, the temperature of the engine coolant and the pressure of the gas cylinder are obtained. Then, step 503 is executed.

In the embodiment of the present disclosure, when the hybrid electric vehicle is started in the natural gas mode, when the power system meets the battery mode operating conditions during the operation of the hybrid electric vehicle, the power system is controlled to operate in the battery mode to provide power for the operation of the hybrid electric vehicle; When the power system does not meet the operating conditions of the battery mode, and the power system meets the operating conditions of the natural gas mode, control the power system to run the natural gas mode to provide operating power for the hybrid vehicle; when the power system does not meet the operating conditions of the battery mode, and does not meet the natural gas mode operation When conditions are met, control the power system to run in gasoline mode to provide running power for the hybrid vehicle. That is, in the embodiments of the present disclosure, the power system is controlled to provide power according to the order of priority that the battery mode is greater than the natural gas mode, and the natural gas mode is greater than the gasoline mode. Since the exhaust emission in the battery mode is zero, and the exhaust emission in the natural gas mode is smaller than that in the gasoline mode, the exhaust emission of the hybrid vehicle during operation can be reduced according to the above power system control method.

Fig. 6 is a structural block diagram of a power system control device 600 of a hybrid electric vehicle provided by an embodiment of the present disclosure. The power system of a hybrid vehicle has a battery mode, a natural gas mode and a gasoline mode. As shown in FIG. 6 , the device includes: a first acquisition module 601 , a second acquisition module 602 and a control module 603 .

Wherein, the first acquiring module 601 is configured to acquire the electric quantity of the battery. The second obtaining module 602 is configured to obtain the temperature of the engine coolant and the pressure of the gas cylinder in response to determining that the electric quantity is less than the first electric quantity threshold. The control module 603 is configured to control the power system to operate in the natural gas mode or the gasoline mode according to the engine coolant temperature and the gas cylinder pressure.

Optionally, the control module 603 is configured to control the power system to run the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to a temperature threshold and the pressure of the natural gas cylinder is greater than or equal to a pressure threshold; or, The powertrain is controlled to operate in the gasoline mode in response to determining that the engine coolant temperature is less than a temperature threshold or the gas cylinder pressure is less than a pressure threshold.

Optionally, the control module 603 is further configured to control the engine to charge the battery after controlling the power system to operate in the natural gas mode until the power of the battery is greater than or equal to the first power threshold; The powertrain is controlled to operate in the battery mode.

Optionally, the control module 603 is further configured to respond to determining that the engine coolant temperature is greater than or equal to the temperature threshold and the gas cylinder pressure is greater than the Pressure threshold, control the power system to run the natural gas mode; control the engine to charge the battery until the power of the battery is greater than or equal to the first power threshold; control the power system to run the battery model.

Optionally, the control module 603 is further configured to control the engine to charge the battery after controlling the power system to operate in the gasoline mode until the power of the battery is greater than or equal to the first power Threshold; controlling the powertrain to operate in the battery mode.

It should be noted that when the power system control device 600 of the hybrid electric vehicle provided in the above embodiment controls the power system of the hybrid electric vehicle, it only uses the division of the above-mentioned functional modules for illustration. The above function allocation is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the hybrid electric vehicle power system control device 600 provided in the above embodiment and the hybrid electric vehicle power system control method embodiment belong to the same concept, and its specific implementation process is detailed in the method embodiment, and will not be repeated here.

An embodiment of the present disclosure also provides a computer device, including: a processor; a memory for storing processor-executable instructions; system control method.

Fig. 7 is a structural block diagram of a computer device provided by an embodiment of the present disclosure. As shown in FIG. 7 , the computer device 700 may be a vehicle-mounted computer or the like. The computer device 700 includes: a processor 701 and a memory 702 .

The processor 701 may include one or more processing cores, such as a 7-core processor, an 8-core processor, and the like. Processor 701 can adopt at least one hardware form in DSP (Digital Signal Processing, digital signal processing), FPGA (Field-Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array, programmable logic array) accomplish. Processor 701 may also include a main processor and a coprocessor, and the main processor is a processor for processing data in a wake-up state, also called a CPU (Central Processing Unit, central processing unit); the coprocessor is Low-power processor for processing data in standby state. In some embodiments, the processor 701 may be integrated with a GPU (Graphics Processing Unit, image processor), and the GPU is used for rendering and drawing the content that needs to be displayed on the display screen. In some embodiments, the processor 701 may also include an AI (Artificial Intelligence, artificial intelligence) processor, where the AI processor is configured to process computing operations related to machine learning.

Memory 702 may include one or more computer-readable media, which may be non-transitory. The memory 702 may also include high-speed random access memory, and non-volatile memory, such as one or more magnetic disk storage devices and flash memory storage devices. In some embodiments, the non-transitory computer-readable medium in the memory 702 is used to store at least one instruction, and the at least one instruction is used to be executed by the processor 701 to implement the hybrid electric vehicle provided in the embodiments of the present disclosure. Powertrain control method.

Those skilled in the art can understand that the structure shown in FIG. 7 does not constitute a limitation to the computer device 700, and may include more or less components than shown in the figure, or combine certain components, or adopt a different component arrangement.

The embodiment of the present disclosure also provides a non-transitory computer-readable medium. When the instructions in the medium are executed by the processor of the computer device 700, the computer device 700 can perform the power operation of the hybrid electric vehicle provided in the embodiment of the present disclosure. system control method.

An embodiment of the present disclosure also provides a computer program product, including computer programs/instructions. When the computer programs/instructions are executed by a processor, the method for controlling the power system of a hybrid electric vehicle provided in the embodiments of the present disclosure is implemented.

The above are only optional embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure Inside.

Claims

A method for controlling a power system of a hybrid electric vehicle, comprising:

Obtain the power of the battery in the power system;

Responsive to determining that the charge is less than a first charge threshold, obtaining engine coolant temperature and gas cylinder pressure;

According to the temperature of the engine coolant and the pressure of the natural gas cylinder, the power system is controlled to operate in a natural gas mode or a gasoline mode.
The method according to claim 1, wherein the controlling the power system to operate in a natural gas mode or a gasoline mode according to the temperature of the engine coolant and the pressure of the natural gas cylinder comprises:

controlling the powertrain to operate the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to a temperature threshold and the natural gas cylinder pressure is greater than or equal to a pressure threshold; or,

The powertrain is controlled to operate in the gasoline mode in response to determining that the engine coolant temperature is less than a temperature threshold or the gas cylinder pressure is less than a pressure threshold.
The method of claim 2, further comprising:

After controlling the power system to run the natural gas mode, controlling the engine to charge the battery until the power of the battery is greater than or equal to the first power threshold;

The powertrain is controlled to operate in a battery mode.
The method of claim 2, further comprising:

When the power system is controlled to run the natural gas mode, the engine is controlled to charge the battery until the electric quantity of the battery is greater than or equal to the second electric quantity threshold and less than the first electric quantity threshold;

Controlling the power battery system to operate in battery mode and natural gas mode.
The method of claim 2, further comprising:

After controlling the powertrain to operate the gasoline mode, in response to determining that the engine coolant temperature is greater than or equal to the temperature threshold and the gas cylinder pressure is greater than or equal to the pressure threshold, controlling the powertrain to operate the the natural gas model;

controlling the engine to charge the battery until the power of the battery is greater than or equal to the first power threshold;

The powertrain is controlled to operate in a battery mode.
The method of claim 2, further comprising:

After controlling the power system to be in the gasoline mode, controlling the engine to charge the battery until the power of the battery is greater than or equal to the first power threshold;

The powertrain is controlled to operate in a battery mode.
The method of claim 2, further comprising:

After controlling the power system to be in the gasoline mode, controlling the engine to charge the battery until the power of the battery is greater than or equal to a second power threshold and less than the first power threshold;

The powertrain is controlled to operate in a battery mode and the gasoline mode.
The method according to any one of claims 1 to 7, further comprising:

In response to determining that the charge is greater than or equal to the first charge threshold, the powertrain is controlled to operate in a battery mode.
A control device for a power system of a hybrid electric vehicle, comprising:

The first obtaining module is used for obtaining the electric quantity of the battery in the power system;

A second acquiring module, configured to acquire engine coolant temperature and gas cylinder pressure in response to determining that the electrical quantity is less than a first electrical quantity threshold;

The control module is used to control the power system to operate in natural gas mode or gasoline mode according to the engine coolant temperature and the gas cylinder pressure.
The apparatus of claim 9 wherein said control module is configured to control said powertrain to operate said engine coolant temperature is greater than or equal to a temperature threshold and said gas cylinder pressure is greater than or equal to a pressure threshold in response to determining that natural gas model described above; or,

The powertrain is controlled to operate in the gasoline mode in response to determining that the engine coolant temperature is less than a temperature threshold or the gas cylinder pressure is less than a pressure threshold.
The device according to claim 9, wherein the control module is further configured to, after controlling the power system to run the natural gas mode, control the engine to charge the battery until the power of the battery is greater than or equal to The first power threshold; controlling the power system to run in a battery mode.
The device according to claim 9, wherein the control module is further configured to, when controlling the power system to run the natural gas mode, control the engine to charge the battery until the power of the battery is greater than or equal to The second electric quantity threshold is less than the first electric quantity threshold; the power battery system is controlled to operate in the battery mode and the natural gas mode.
The apparatus of claim 8 , wherein the control module is further configured to, after controlling the powertrain to operate the gasoline mode, in response to determining that the engine coolant temperature is greater than or equal to the temperature threshold and the The pressure of the natural gas cylinder is greater than or equal to the pressure threshold, and the power system is controlled to run the natural gas mode; the engine is controlled to charge the battery until the power of the battery is greater than or equal to the first power threshold; The powertrain is controlled to operate in a battery mode.
The device according to claim 8, wherein the control module is further configured to, after controlling the power system to be in the gasoline mode, control the engine to charge the battery until the power of the battery is greater than or equal to the first power threshold; controlling the power system to run in battery mode.
The device according to claim 8, wherein the control module is further configured to, after controlling the power system to be in the gasoline mode, control the engine to charge the battery until the power of the battery is greater than Or equal to the second electric quantity threshold and less than the first electric quantity threshold; controlling the power system to operate in the battery mode and the gasoline mode.
The device according to any one of claims 9 to 15, wherein the control module is further configured to, in response to determining that the power level is greater than or equal to the first power level threshold, control the power system to operate in a battery mode.
A computer device comprising:

processor;

memory for storing processor-executable instructions;

Wherein, the processor is configured to execute the method according to any one of claims 1-8.
A computer-readable medium, when the instructions in the computer-readable medium are executed by a processor of the computer device, the computer device can execute the method according to any one of claims 1 to 8.
A computer program product comprising computer programs/instructions, wherein the computer program/instructions implement the method according to any one of claims 1 to 8 when executed by a processor.