阅读说明：本技术 发动机的启动方法、车辆和可读存储介质 (Engine starting method, vehicle and readable storage medium ) 是由 周亚芬 邵杰 曹宇 李翔 秦鑫 于 2021-07-22 设计创作，主要内容包括：本发明公开了一种发动机的启动方法、车辆和可读存储介质,所述方法包括以下步骤：接收用户下达的指令,根据启动指令判断是否需要启动发动机,或获取车辆的状态,根据车辆状态判断是否需要启动发动机；若判断结果为需要启动所述发动机,则获取车辆运行参数,根据所述车辆运行参数判断所述发动机是否满足低压启动条件；若所述发动机满足低压启动条件,则以低压启动模式运行。通过本发明可以避免低温环境下发动机无法启动。(The invention discloses a starting method of an engine, a vehicle and a readable storage medium, wherein the method comprises the following steps: receiving an instruction issued by a user, judging whether the engine needs to be started or not according to the starting instruction, or acquiring the state of the vehicle, and judging whether the engine needs to be started or not according to the state of the vehicle; if the judgment result is that the engine needs to be started, acquiring vehicle operation parameters, and judging whether the engine meets a low-pressure starting condition or not according to the vehicle operation parameters; and if the engine meets the low-pressure starting condition, operating in a low-pressure starting mode. The invention can avoid the problem that the engine can not be started in a low-temperature environment.)

1. A starting method of an engine, which is applied to a hybrid vehicle, comprising the steps of:

receiving an instruction issued by a user, judging whether the engine needs to be started or not according to the starting instruction, or acquiring the state of the vehicle, and judging whether the engine needs to be started or not according to the state of the vehicle;

if the judgment result is that the engine needs to be started, acquiring vehicle operation parameters, and judging whether the engine meets a low-pressure starting condition or not according to the vehicle operation parameters;

and if the engine meets the low-pressure starting condition, operating in a low-pressure starting mode.

2. The starting method of the engine according to claim 1, wherein the step of obtaining a vehicle operation parameter if the engine needs to be started as a result of the determination, and the step of determining whether the engine satisfies a low-pressure starting condition based on the vehicle operation parameter includes:

if the judgment result is that the engine needs to be started, acquiring the ambient temperature of the vehicle, and judging whether the ambient temperature is lower than a preset temperature or not; if the engine meets a low pressure starting condition, the step of operating in a low pressure starting mode comprises:

and if the ambient temperature is lower than the preset temperature, operating in a low-pressure starting mode.

3. The method for starting an engine according to claim 1, wherein said step of obtaining a vehicle operation parameter if it is determined that the engine needs to be started, and said step of determining whether the engine satisfies a low pressure start condition based on the vehicle operation parameter further comprises:

if the judgment result is that the engine needs to be started, obtaining the allowable discharge power of the vehicle-mounted battery pack, and judging whether the allowable discharge power is smaller than the preset power;

if the engine meets a low pressure starting condition, the step of operating in a low pressure starting mode comprises:

and if the allowable discharge power is smaller than the preset power, judging that the engine meets a low-pressure starting condition.

4. The method for starting an engine according to claim 1, wherein said step of obtaining a vehicle operation parameter if it is determined that the engine needs to be started, and said step of determining whether the engine satisfies a low pressure start condition based on the vehicle operation parameter further comprises:

if the judgment result is that the engine needs to be started, acquiring the ambient temperature of the vehicle, the allowable discharge power of the vehicle-mounted battery pack and the running state of the vehicle;

judging whether the environment temperature is lower than a preset temperature, whether the allowable discharge power is lower than a preset power and whether the running state is in a static state;

if the engine meets a low pressure starting condition, the step of operating in a low pressure starting mode comprises:

and if the environment temperature is lower than the preset temperature, the allowable discharge power is lower than the preset power, and the running state is in a static state, running in a low-voltage starting mode.

5. The method for starting an engine according to claim 1, wherein said step of operating in a low-pressure start mode if said engine satisfies a low-pressure start condition comprises:

and if the engine meets the low-pressure starting condition, controlling a low-pressure starting motor to start the engine.

6. The method for starting an engine according to claim 1, wherein said step of operating in a low pressure start mode if said engine satisfies a low pressure start condition, further comprises:

monitoring whether the rotating speed of the engine is greater than or equal to a preset rotating speed in real time;

and if the rotating speed of the engine is greater than or equal to the preset rotating speed, exiting the low-pressure starting mode.

7. The method for starting an engine according to claim 1, wherein said step of operating in a low pressure start mode if said engine satisfies a low pressure start condition, further comprises:

when the vehicle is in a low pressure start mode, the engine oil tank valve is kept open.

8. A vehicle comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method of starting an engine according to any one of claims 1 to 7.

9. A readable storage medium, characterized in that it has stored thereon a computer program which, when being executed by a processor, carries out the steps of a starting method of an engine according to any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to a starting method of an engine, a vehicle and a readable storage medium.

Background

With the rapid development of new energy vehicles, the types and the number of hybrid vehicles are increasing. Generally, there are two sources of driving force for hybrid vehicles: one is a drive motor powered by a power battery and the other is an engine powered by fuel. During the starting process of the engine, the power battery is also required to provide energy. In a low-temperature environment, the battery has a small discharge power, and thus the battery cannot provide enough power to enable the motor to complete the starting of the engine, which may result in the unsuccessful starting of the engine.

Disclosure of Invention

The invention provides a starting method of an engine, and aims to solve the technical problems that in a low-temperature environment, the discharge power of a battery is low, and an automobile engine cannot be started successfully.

To achieve the above object, the present invention provides a starting method of an engine, comprising the steps of:

receiving an instruction issued by a user, judging whether the engine needs to be started or not according to the starting instruction, or acquiring the state of the vehicle, and judging whether the engine needs to be started or not according to the state of the vehicle;

if the judgment result is that the engine needs to be started, acquiring vehicle operation parameters, and judging whether the engine meets a low-pressure starting condition or not according to the vehicle operation parameters;

and if the engine meets the low-pressure starting condition, operating in a low-pressure starting mode.

Optionally, if the judgment result is that the engine needs to be started, acquiring the ambient temperature of the vehicle, and judging whether the ambient temperature is lower than a preset temperature; if the engine meets a low pressure starting condition, the step of operating in a low pressure starting mode comprises:

and if the ambient temperature is lower than the preset temperature, operating in a low-pressure starting mode.

Optionally, if the judgment result is that the engine needs to be started, obtaining the allowable discharge power of the vehicle-mounted battery pack, and judging whether the allowable discharge power is smaller than a preset power;

if the engine meets a low pressure starting condition, the step of operating in a low pressure starting mode comprises:

and if the allowable discharge power is smaller than the preset power, judging that the engine meets a low-pressure starting condition.

Optionally, if the judgment result is that the engine needs to be started, acquiring the ambient temperature of the vehicle, the allowable discharge power of the vehicle-mounted battery pack and the running state of the vehicle;

judging whether the environment temperature is lower than a preset temperature, whether the allowable discharge power is lower than a preset power and whether the running state is in a static state;

if the engine meets a low pressure starting condition, the step of operating in a low pressure starting mode comprises:

and if the environment temperature is lower than the preset temperature, the allowable discharge power is lower than the preset power, and the running state is in a static state, running in a low-voltage starting mode.

Optionally, the low-pressure starter is controlled to start the engine if the engine meets a low-pressure starting condition.

Optionally, monitoring whether the rotating speed of the engine is greater than or equal to a preset rotating speed in real time;

and if the rotating speed of the engine is greater than or equal to the preset rotating speed, exiting the low-pressure starting mode.

Optionally, the engine oil tank valve is kept open when the vehicle is in a low pressure start mode.

To achieve the above object, the present application also proposes a vehicle comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the starting method of the engine.

To achieve the above object, the present application also proposes a readable storage medium having stored thereon a computer program which, when executed by a processor, implements a starting method of the engine.

According to the technical scheme, an instruction issued by a user is received, whether the engine needs to be started or not is judged according to the starting instruction, or the state of the vehicle is obtained, and whether the engine needs to be started or not is judged according to the state of the vehicle; if the judgment result is that the engine needs to be started, acquiring vehicle operation parameters, and judging whether the engine meets a low-pressure starting condition or not according to the vehicle operation parameters; and if the engine meets the low-pressure starting condition, operating in a low-pressure starting mode. Because the discharge power of the battery is smaller in the low-temperature environment, the output power of the battery may not reach the condition of starting the engine, and the low-voltage starting mode can avoid the condition that the engine cannot be started in the low-temperature environment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a block diagram illustrating a method for starting an engine according to an embodiment of the present invention;

fig. 2 is a flowchart of a starting method of an engine according to an embodiment of the present invention.

Fig. 3 is a detailed flowchart of a starting method of an engine according to an embodiment of the present invention.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, fig. 1 is a schematic diagram of a hardware structure of a vehicle according to various embodiments of the present invention. The vehicle comprises an execution module 01, a memory 02, a processor 03 and the like. Those skilled in the art will appreciate that the vehicle shown in FIG. 1 may also include more or fewer components than shown, or some components may be combined, or a different arrangement of components. The processor 03 is connected to the memory 02 and the execution module 01, respectively, and the memory 02 stores a computer program, which is executed by the processor 03 at the same time.

The execution module 01 can collect the ambient temperature of the vehicle, acquire the allowable output power of the battery, and feed back the information to the processor 03.

The memory 02 may be used to store software programs and various data. The memory 02 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data or information created according to the use of the terminal, or the like. Further, the memory 02 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 03, which is a control center of the processing platform, connects various parts of the entire terminal by using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 02 and calling data stored in the memory 02, thereby integrally monitoring the vehicle. Processor 03 may include one or more processing units; preferably, the processor 03 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 03.

Those skilled in the art will appreciate that the vehicle configuration shown in FIG. 1 does not constitute a limitation of the vehicle, and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.

Various embodiments of the method of the present invention are presented in terms of the above-described hardware architecture.

Referring to fig. 2, in the first embodiment of the starting method of the engine of the present invention, the starting method of the engine includes:

step S100, receiving an instruction issued by a user, judging whether the engine needs to be started or not according to the starting instruction, or acquiring the state of the vehicle, and judging whether the engine needs to be started or not according to the state of the vehicle;

when the engine is started on the hybrid electric vehicle, generally, after the power supply is switched on, the starting motor converts the electric energy output by the battery into mechanical energy so as to enable the starting motor to start rotating, the rotation of the engine is driven by the rotation of the starting motor, and when the engine reaches a certain rotating speed, the starting motor stops working immediately. However, in a low-temperature environment, since the power discharged by the battery is small, sufficient power cannot be provided to the starter motor so that the starter motor drives the engine, which may result in that the engine cannot be successfully started.

In this embodiment, the component that determines whether the vehicle needs to start the engine is the vehicle controller, and the vehicle controller may start the engine according to an instruction issued by a user, or may start the engine according to a running state of the vehicle. For example, if a user needs to start the vehicle, a starting instruction is sent to the vehicle, and after the vehicle control unit receives the instruction of starting the vehicle from the user, an instruction is given to control the engine to start; for example, in a low-speed driving section, if the vehicle needs to accelerate or climb a slope in the energy supply mode of the vehicle in the electric mode, the vehicle controller switches the energy supply mode of the vehicle to the hybrid mode and issues a command to control the engine to start.

Step S200, if the judgment result is that the engine needs to be started, acquiring vehicle operation parameters, and judging whether the engine meets a low-pressure starting condition or not according to the vehicle operation parameters;

the low-pressure starting condition is preset by workers in the field according to preset conditions and can be adjusted at any time according to specific conditions. In this embodiment, the vehicle operation parameter is related to the low-voltage starting condition, and the vehicle operation parameter may be an ambient temperature of the vehicle, a battery remaining capacity of the vehicle, a speed of the vehicle, an acceleration of the vehicle, or the like.

And step S300, if the engine meets a low-pressure starting condition, operating in a low-pressure starting mode.

In this embodiment, the low-voltage start mode of the vehicle is a start mode of an engine of the vehicle, and the engine may be started by prolonging the start time of the engine, or may be started by starting motors of different types.

In one embodiment, step S200 includes:

if the judgment result is that the engine needs to be started, acquiring the ambient temperature of the vehicle, and judging whether the ambient temperature is lower than a preset temperature or not; the step S300 includes:

and if the ambient temperature is lower than the preset temperature, operating in a low-pressure starting mode.

The preset temperature is a temperature threshold preset by a person skilled in the art according to a preset rule, and when the ambient temperature is lower than the preset temperature, the vehicle engine is difficult to start normally and needs to start in a low-pressure starting mode. In this embodiment, a plurality of temperature sensors are installed on the vehicle, the ambient temperature of the environment where the vehicle is located can be obtained through the temperature sensors installed on the vehicle, if the vehicle controller determines that the ambient temperature where the vehicle is located is greater than or equal to the preset temperature, the engine is started in the normal mode, and if the vehicle controller determines that the ambient temperature where the vehicle is located is less than the preset temperature, the engine is started in the low-pressure start mode. Since the voltage and the discharge capacity of the vehicle-mounted battery are reduced due to the fact that the temperature of the vehicle is too low, the power of the battery allowed to discharge is small, the electric energy obtained by the starting motor is also reduced, the rotating speed of the starting motor is too slow, the engine cannot be started successfully in a normal mode or the time for starting the engine is too long, and a low-voltage starting mode needs to be applied in order to protect the engine and the starting motor.

In one embodiment, step S200 further includes:

if the judgment result is that the engine needs to be started, obtaining the allowable discharge power of the vehicle-mounted battery pack, and judging whether the allowable discharge power is smaller than the preset power;

step S300 includes:

and if the allowable discharge power is smaller than the preset power, judging that the engine meets a low-pressure starting condition.

The preset power is a threshold value of the output power of the vehicle-mounted battery pack preset by a person skilled in the art according to a preset rule, and if the allowable discharge power of the vehicle-mounted battery pack is greater than or equal to the preset power, the generator is started in a normal mode; if the allowable discharge power of the vehicle-mounted battery pack is smaller than the preset power, the vehicle engine is difficult to start normally, and the generator needs to be started in a low-voltage starting mode. In this embodiment, the vehicle-mounted battery pack is electrically connected to the starter motor, and the starter motor is electrically connected to the engine. After a vehicle controller of a vehicle issues a starting instruction of an engine, the vehicle-mounted battery pack outputs electric energy to the starting motor, the starting motor converts the electric energy into mechanical energy, and the mechanical energy is transmitted to the engine so as to drive the engine to rotate. If the electric energy provided by the vehicle-mounted battery pack is too small, the rotating speed of the starting motor is too low, so that the engine may not be successfully started in a normal mode or the time for starting the engine is too long, and a low-voltage starting mode needs to be applied in order to protect the engine and the starting motor.

In one embodiment, step S200 further includes:

step S210, if the judgment result is that the engine needs to be started, acquiring the ambient temperature of the vehicle, the allowable discharge power of the vehicle-mounted battery pack and the running state of the vehicle;

step S220, judging whether the environment temperature is lower than a preset temperature, whether the allowable discharge power is lower than a preset power and whether the running state is in a static state;

step S300 includes:

step S240, if the ambient temperature is lower than a preset temperature, the allowable discharging power is lower than a preset power, and the operating state is in a static state, operating in a low-voltage starting mode.

In this embodiment, after the vehicle control unit determines that the vehicle needs to start the engine, there are three conditions for the vehicle engine to operate in the low-pressure start mode. Firstly, judging whether the ambient temperature of the vehicle is lower than a preset temperature or not, and starting the engine in a normal mode if the ambient temperature of the vehicle is higher than or equal to the preset ambient temperature; if the ambient temperature of the vehicle is lower than the preset temperature, judging whether the allowable discharge power of the vehicle-mounted battery pack is lower than the preset power, if the allowable discharge power of the vehicle-mounted battery pack is higher than or equal to the preset power, starting the engine in a normal mode, if the allowable discharge power of the vehicle-mounted battery pack is lower than the preset power, judging whether the vehicle is in a static state, if the vehicle is in a running state, starting the engine in the normal mode or prompting a driver that the engine cannot be started, and if the vehicle is in the static state, starting the engine in a low-voltage mode. In this embodiment, the engine can be started in the low-voltage start mode only when the vehicle ambient temperature is less than the preset temperature, the allowable discharge power of the vehicle-mounted battery pack is less than the preset power, and the vehicle is in a stationary state. For example, if the preset temperature of the battery is-30 ℃ and the preset power is 5kW, the engine is started in the low-pressure start mode under the condition that the ambient temperature of the vehicle is lower than-30 ℃, the allowable discharge power of the on-board battery pack is less than 5kW, and the vehicle is in a stationary state. In this state, the engine is not started in the normal mode, but is started in the low-voltage starting mode, so that the discharge amount of the vehicle-mounted battery pack at low temperature can be reduced, and the battery pack, the starter motor and the engine are protected.

In one embodiment, step S300 includes:

and if the engine meets the low-pressure starting condition, controlling a low-pressure starting motor to start the engine.

In this embodiment, install the starter motor of at least two engines on the vehicle, one is the starter motor commonly used, and one is low pressure starter motor, and two starter motors all are supplied energy by on-vehicle battery package, and can both start the engine. The common starter motor is used for starting the engine under normal conditions, and if the vehicle meets a low-voltage starting condition, the low-voltage starter motor is controlled to start the engine. The low-voltage starting motor needs less electric energy for working than the common starting motor, so the low-voltage starting motor is less influenced by temperature than the common starting motor. In one embodiment, the rated voltage of the common starter motor is 24V, and the rated voltage of the low-voltage starter motor is 12V. The low-voltage starting motor can solve the problem that the engine of the hybrid electric vehicle is difficult to start at low temperature, and shortens the starting time of the engine at low temperature.

In an embodiment, after step S300, the method further includes:

monitoring whether the rotating speed of the engine is greater than or equal to a preset rotating speed in real time;

and if the rotating speed of the engine is greater than or equal to the preset rotating speed, exiting the low-pressure starting mode.

In this embodiment, the preset rotation speed is preset by a person skilled in the art according to a preset rule, whether the engine is successfully started is judged according to the rotation speed of the engine, when the rotation speed of the engine is greater than or equal to the preset rotation speed, the engine can be judged to be successfully started, and at this time, the starting motor can stop working. Therefore, after the vehicle enters the low-voltage starting mode, when the rotating speed of the engine is greater than or equal to the preset rotating speed, the vehicle control unit shuts down the low-voltage starting motor, and meanwhile, the vehicle-mounted battery pack stops supplying energy to the low-voltage starting motor.

In an embodiment, after step S300, the method further includes:

when the vehicle is in a low pressure start mode, the engine oil tank valve is kept open.

During the starting process of the engine, the automobile oil pump can start to work simultaneously, the oil pump sucks gasoline or diesel oil from the oil tank into the engine, and the continuous oil supply of the engine is also a necessary condition for the normal starting of the engine. If the oil of the engine is cut off in the starting process, the engine cannot be normally started. Therefore, before the engine is started, the oil storage amount in the oil tank needs to be ensured to be larger than the minimum oil amount needed by the engine, the valve of the oil tank is opened, and the oil pump works normally.

The invention also proposes a vehicle comprising a memory, a processor, and a computer program stored on said memory and executable on said processor for carrying out the method according to the various embodiments of the invention.

The invention also proposes a readable storage medium on which the computer program is stored. The computer-readable storage medium may be the Memory in fig. 1, and may also be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, and the computer-readable storage medium includes several instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, a terminal, or a network device) having a processor to execute the method according to the embodiments of the present invention.

In the present invention, the terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although the embodiment of the present invention has been shown and described, the scope of the present invention is not limited thereto, it should be understood that the above embodiment is illustrative and not to be construed as limiting the present invention, and that those skilled in the art can make changes, modifications and substitutions to the above embodiment within the scope of the present invention, and that these changes, modifications and substitutions should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.