Vehicle control method and device, vehicle and storage medium

Abstract

The invention provides a vehicle control method and device, a vehicle and a storage medium, and relates to the technical field of vehicles. The method comprises the steps that when a collision signal is detected, safety protection operation is executed on an engine system of the vehicle, and whether the vehicle has an operation risk or not is recognized; when the vehicle has the running risk and it is detected that the current high-pressure oil way pressure is larger than a first preset pressure threshold value, at least one first oil sprayer is used for executing first pressure relief operation; and when the vehicle has the operation risk and it is detected that the current pressure of the low-pressure oil way is larger than a second preset pressure threshold value, at least one preset device connected with the low-pressure oil way is used for pressure relief according to a preset pressure relief strategy. The corresponding pressure relief operation is executed only when the running risk of the vehicle exists and the too high pressure of the oil way is detected, the situation that the running stability of the vehicle is affected by the meaningless pressure relief operation is avoided, meanwhile, potential safety hazards are eliminated before serious accidents such as oil leakage occur, and the running safety of the vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a vehicle control method, device, vehicle and storage medium. Background Art

[0002] In recent years, vehicles have gradually developed in the direction of structural rationality and diversified functions, which has improved vehicle performance and driving experience. However, the diversified development of vehicle functions has also made the internal structure of the vehicle more dense and complex. After a vehicle collision, the complex structural design also increases the risk of safety accidents such as spontaneous combustion.

[0003] However, the current control methods for vehicles after a collision accident are often relatively simple and have obvious limitations, making it difficult to ensure the safety of the vehicle. Summary of the invention

[0004] The problem solved by the present invention is how to improve the safety of the vehicle.

[0005] In order to solve the above problems, the present invention provides a vehicle control method, comprising:

[0006] When a collision signal is detected, a safety protection operation is performed on the engine system of the vehicle, and whether the vehicle has an operating risk is identified based on the acquired vehicle operating information; wherein the safety protection operation includes a fuel cut-off operation;

[0007] When the vehicle has the operating risk and it is detected based on the vehicle operating information that the current high-pressure oil circuit pressure is greater than a first preset pressure threshold, a first pressure relief operation is performed using at least one first injector connected to the high-pressure oil circuit in the engine system; wherein the first injector is used to inject oil into a cylinder in the engine system when in an open state;

[0008] When the vehicle has the operating risk and it is detected based on the vehicle operating information that the current low-pressure oil circuit pressure is greater than a second preset pressure threshold, pressure relief is performed using at least one preset device connected to the low-pressure oil circuit in the engine system according to a preset pressure relief strategy.

[0009] Optionally, the vehicle operation information includes temperature information and a vehicle collision speed when the collision signal is detected; and the step of identifying whether the vehicle has an operation risk according to the acquired vehicle operation information includes:

[0010] When the collision speed of the vehicle is greater than a preset speed, and / or the temperature information satisfies a preset over-temperature condition, it indicates that the vehicle has the operating risk; wherein the temperature information includes at least one of the engine water temperature, the engine oil temperature, the intake manifold temperature and the catalyst temperature.

[0011] Optionally, performing a first pressure relief operation using at least one first injector connected to a high-pressure oil circuit in the engine system includes:

[0012] The state determination step includes determining the current working state of each cylinder in the engine system according to the vehicle operation information; wherein the current working state includes a combustion state or an uncombustion state;

[0013] According to the current working state of each cylinder and the preset control strategy, at least one of the first injectors is controlled to be in the open state until the current high-pressure oil circuit pressure is less than or equal to the first preset pressure threshold; wherein the preset control strategy includes, when the cylinder is in the unburned state, controlling the first injector corresponding to the cylinder to be in the open state; when the cylinder is in the combustion state, returning to the state determination step.

[0014] Optionally, the vehicle operation information includes camshaft operation information and ignition system operation information; and determining the current working state of each cylinder in the engine system according to the vehicle operation information includes:

[0015] For each of the cylinders, the current stroke of the cylinder is determined according to the camshaft operating information, and the current working state of the cylinder is determined based on the current stroke; wherein, when the current stroke is a compression stroke, and it is determined according to the ignition system operating information that the cylinder is in an ignited state, the current working state is the combustion state.

[0016] Optionally, the step of performing pressure relief according to a preset pressure relief strategy by using at least one preset device connected to the low-pressure oil circuit in the engine system includes:

[0017] When the preset device is a high-pressure oil pump, the second pressure relief operation is performed by using the high-pressure oil pump;

[0018] When the preset device is at least one second fuel injector, a third pressure relief operation is performed using at least one second fuel injector; wherein the second fuel injector is used to inject fuel into an intake manifold in the engine system when in the open state;

[0019] When the preset device is a high-pressure oil pump and at least one of the second fuel injectors, the second pressure relief operation is performed using the high-pressure oil pump, and / or the third pressure relief operation is performed using at least one of the second fuel injectors.

[0020] Optionally, the performing a second pressure relief operation by using the high-pressure oil pump includes:

[0021] The high-pressure oil pump is controlled to operate according to a preset duty cycle until the current low-pressure oil circuit pressure is less than or equal to the second preset pressure threshold, and / or the acquired engine speed is less than a preset speed threshold.

[0022] Optionally, the engine system further includes a carbon canister, a throttle, an ignition system and a cooling system; the safety protection operation further includes at least one of closing a flushing valve of the carbon canister, closing the throttle, controlling the ignition system to stop running, and controlling the cooling system to run at a preset power; before performing the first pressure relief operation using at least one first injector connected to the high-pressure oil circuit in the engine system, and / or before performing the third pressure relief operation using at least one second injector, it also includes:

[0023] determining a current air leakage amount of the throttle valve based on the vehicle operation information;

[0024] When the current leakage amount is greater than a preset permissible threshold, all target injectors are controlled to be in a closed state; wherein the target injectors include at least one of the first injector and the second injector.

[0025] In the present invention, when a collision signal is detected, a fuel cut-off and other safety protection operations are performed on the engine system of the vehicle, which is conducive to timely reducing the risk of fire and the possibility of secondary injury after the vehicle collides, and giving priority to ensuring the safety of the vehicle and personnel after the accident. On this basis, obtaining vehicle operation information is conducive to reflecting actual conditions such as the severity of the vehicle collision, and thus providing an accurate reference basis for assessing whether the vehicle has an operation risk. After identifying that the vehicle has an operation risk and the oil circuit pressure is too high, the present invention can implement a targeted pressure relief operation. Among them, when the first injector is in an open state, it is used to spray oil into the cylinder in the engine system. When the current high-pressure oil circuit pressure is greater than the first preset pressure threshold, at least one first injector connected to the high-pressure oil circuit in the engine system is used to perform a first pressure relief operation such as controlling the first injector to be in an open state, so as to effectively reduce the high-pressure oil circuit pressure. While reducing the probability of fuel leakage, it is also conducive to avoiding damage to components such as the first injector due to excessive pressure. When the current low-pressure oil circuit pressure is greater than the second preset pressure threshold, at least one preset device connected to the low-pressure oil circuit in the engine system can be used to release pressure according to a preset pressure relief strategy. The present invention controls the vehicle according to a preset pressure relief strategy, which reduces the probability of fuel leakage while being compatible with different engine structural characteristics to achieve efficient pressure relief. This is compared to the method of immediately performing a pressure relief operation once the high-pressure oil circuit and / or low-pressure oil circuit pressure is detected to be too high after a collision is detected, or the method of performing a pressure relief operation only after a more serious oil leakage is detected after a collision. The present invention identifies whether the vehicle has an operating risk based on vehicle operation information, which is beneficial to predicting the possibility of accidents such as fuel leakage or even fire caused by abnormalities such as excessive oil circuit pressure based on the current actual situation. In this way, the present invention only performs the corresponding pressure relief operation when there is an operating risk in the vehicle and the oil circuit pressure is detected to be too high, avoiding blindly performing meaningless pressure relief operations, which affects the safety and stability of the vehicle, and is also beneficial to eliminate safety hazards before serious accidents such as oil leakage occur, thereby comprehensively improving the safety of the vehicle.

[0026] The present invention also provides a vehicle control device, comprising:

[0027] A collision detection module, which is used to perform a safety protection operation on the engine system of the vehicle when a collision signal is detected, and to identify whether the vehicle has an operating risk based on the acquired vehicle operating information; wherein the safety protection operation includes a fuel cut-off operation;

[0028] a first pressure relief module, which is used to perform a first pressure relief operation using at least one first fuel injector connected to the high-pressure fuel circuit in the engine system when the vehicle has the operating risk and detects that the current high-pressure fuel circuit pressure is greater than a first preset pressure threshold based on the vehicle operating information; wherein the first fuel injector is used to spray fuel into a cylinder in the engine system when it is in an open state;

[0029] A second pressure relief module is used to relieve pressure using at least one preset device connected to the low-pressure oil circuit in the engine system according to a preset pressure relief strategy when the vehicle is at the operating risk and detects based on the vehicle operating information that the current low-pressure oil circuit pressure is greater than a second preset pressure threshold.

[0030] The advantages of the vehicle control device provided by the present invention and the vehicle control method compared with the prior art are basically the same, and will not be repeated here.

[0031] The present invention also provides a vehicle, comprising a memory and a processor;

[0032] The memory is used to store computer programs;

[0033] The processor is configured to implement the vehicle control method as described above when executing the computer program.

[0034] The advantages of the vehicle provided by the present invention and the vehicle control method compared to the prior art are basically the same and will not be elaborated here.

[0035] The present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the vehicle control method as described above is implemented.

[0036] The advantages of the computer-readable storage medium provided by the present invention and the vehicle control method compared to the prior art are basically the same and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic flow chart of a vehicle control method according to an embodiment of the present invention;

[0038] Figure 2 A schematic flow chart of a vehicle control method according to another embodiment of the present invention;

[0039] Figure 3 A schematic structural diagram of a vehicle control device according to an embodiment of the present invention;

[0040] Figure 4 Schematic diagram of the structure of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0042] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0043] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". Relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0044] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0045] like Figure 1 As shown, a vehicle control method provided by an embodiment of the present invention includes the following steps:

[0046] S1: When a collision signal is detected, a safety protection operation is performed on the engine system of the vehicle, and whether the vehicle has an operating risk is identified based on the acquired vehicle operating information; wherein the safety protection operation includes a fuel cut-off operation.

[0047] Specifically, the engine system, as a core component of fuel vehicles and hybrid vehicles, plays the role of converting the chemical energy of fuel into mechanical energy to provide power for the vehicle. In this embodiment, the engine system may also include a fuel system, an intake system, an exhaust system, and a cooling system in addition to the engine body. After a vehicle collision, the strong impact force usually causes serious accidents such as structural deformation, oil leakage, and even spontaneous combustion in the engine system. In order to reduce the secondary damage that may occur after the collision, this embodiment needs to perform a fuel cut-off operation on the engine system after detecting the collision signal. For example, after detecting the collision signal, the low-pressure oil pump in the engine system can be controlled to stop running to prevent the low-pressure oil pump from continuously drawing fuel from the fuel tank and delivering it to the oil circuit and the engine.

[0048] In one embodiment, a pre-configured collision detection device (such as a collision sensor) can be used to detect whether the vehicle has collided. After detecting the collision signal emitted by the collision detection device, while performing safety protection operations on the engine system, the vehicle operation information can be obtained to identify whether the vehicle has an operation risk. For example, the vehicle operation information may include fault information after a collision occurs (such as chassis system faults and engine system faults, etc.), and corresponding preset risk levels can be set in advance for different fault information according to the degree of impact of different faults on the safe operation of the vehicle or engine system. When it is detected that the preset risk level corresponding to the fault information exceeds the preset level, it can be indicated that the vehicle has an operation risk.

[0049] S2: When there is an operating risk for the vehicle and it is detected based on the vehicle operating information that the current high-pressure oil circuit pressure is greater than a first preset pressure threshold, a first pressure relief operation is performed using at least one first injector connected to the high-pressure oil circuit in the engine system; wherein the first injector is used to spray oil into a cylinder in the engine system when it is in an open state.

[0050] Specifically, due to considerations of operating conditions, fuel economy, and performance requirements, the composition structures of engine systems of different vehicles are usually different. For example, for an engine system equipped with a high-pressure injection unit, its fuel system is mainly composed of a fuel tank, a low-pressure oil pump, a low-pressure oil circuit, a high-pressure oil pump, and a high-pressure oil circuit connected in sequence, and the high-pressure oil circuit supplies fuel to the cylinder of the engine through an injector. For another example, for an engine system equipped with a low-pressure injection unit, its fuel system is mainly composed of a fuel tank, a low-pressure oil pump, and a low-pressure oil circuit connected in sequence, and the low-pressure oil circuit supplies fuel to the cylinder of the engine through an injector. Among them, the first injector referred to in this embodiment represents the injector that injects fuel in the high-pressure oil circuit into the low-pressure oil circuit in the above-mentioned engine system equipped with a high-pressure injection unit.

[0051] In one embodiment, for different engine systems, the oil circuit pressure information covered by the vehicle operation information referred to in this embodiment may also be different. For example, for an engine system equipped with a high-pressure injection unit, it includes a high-pressure oil circuit and a low-pressure oil circuit at the same time. Then correspondingly, its vehicle operation information may include the high-pressure oil circuit pressure corresponding to the high-pressure oil circuit, and the low-pressure oil circuit pressure corresponding to the low-pressure oil circuit. For another example, for an engine system equipped with a low-pressure injection unit, it includes a low-pressure oil circuit. Then correspondingly, its vehicle operation information may include the low-pressure oil circuit pressure corresponding to the low-pressure oil circuit. For another example, for an engine system equipped with both a high-pressure injection unit and a low-pressure injection unit, it includes a high-pressure oil circuit and a low-pressure oil circuit at the same time. Then correspondingly, its vehicle operation information may include the high-pressure oil circuit pressure corresponding to the high-pressure oil circuit, and the low-pressure oil circuit pressure corresponding to the low-pressure oil circuit at the same time. Based on this, this embodiment can determine the oil circuit contained in the engine system based on the pressure information, and whether the corresponding oil circuit pressure exceeds the preset threshold. That is, in this embodiment, it is possible to detect whether the current high-pressure oil circuit pressure is greater than the first preset threshold based on the vehicle operation information, and / or, to detect whether the current low-pressure oil circuit pressure is greater than the second preset pressure threshold based on the vehicle operation information.

[0052] In one embodiment, the corresponding pressure threshold can be set in advance according to the permissible pressure range of the oil circuit. For example, the first preset pressure threshold can be 1.5 times the preset pressure, and the second preset pressure threshold can be 1.3 times the preset pressure. Among them, the preset pressure can include atmospheric pressure, and the atmospheric pressure can be obtained and stored in advance according to the pressure detection device, or obtained in real time by the pressure detection device when the vehicle detects a collision signal. When there is an operating risk in the vehicle, and it is detected that the current high-pressure oil circuit pressure is greater than the first preset pressure threshold. Since the current high-pressure oil circuit pressure can be detected, the high-pressure oil circuit exists in the engine system accordingly, and the first pressure relief operation can be performed using at least one first injector connected to the high-pressure oil circuit in the engine system. For example, when the current high-pressure oil circuit pressure is detected to be greater than the first preset pressure threshold, the embodiment can control all the first injectors connected to the high-pressure oil circuit to be in the open state at the same time, thereby quickly injecting the fuel in the high-pressure oil circuit into the engine cylinder, reducing the fuel reserve in the high-pressure oil circuit, and thus reducing the pressure of the high-pressure oil circuit.

[0053] S3: When there is an operating risk for the vehicle and it is detected based on the vehicle operating information that the current low-pressure oil circuit pressure is greater than a second preset pressure threshold, pressure relief is performed using at least one preset device connected to the low-pressure oil circuit in the engine system according to a preset pressure relief strategy.

[0054] Specifically, the preset pressure relief strategy in this embodiment can be set in advance according to the structural composition of different engine systems. For example, when the engine system is equipped with a high-pressure oil pump connected to the low-pressure oil circuit, the low-pressure oil circuit is mainly used to supply fuel to the high-pressure oil circuit (such as the engine system equipped with a high-pressure injection unit as mentioned above), the high-pressure oil pump can be controlled to open, and the fuel in the low-pressure oil circuit can be pumped into the high-pressure oil circuit, reducing the residual fuel in the low-pressure oil circuit, thereby reducing the current low-pressure oil circuit pressure.

[0055] Optionally, after identifying whether the vehicle has an operation risk according to the acquired vehicle operation information, the following steps are further included:

[0056] When the vehicle does not have the operating risk, the current high-pressure oil circuit pressure is updated once at a preset time interval until a preset number of times is reached;

[0057] Obtaining a first duration during which the current high-pressure oil circuit pressure is greater than the first pressure threshold;

[0058] When it is detected that the first duration is greater than a first preset duration, it is indicated that the vehicle has the operation risk and parking prompt information is generated.

[0059] It should be understood that, generally, after a minor collision, the impact on the vehicle performance is relatively small in a short period of time, and the probability of identifying the vehicle as having an operating risk based on the vehicle operation information is very low. In this scenario, the driver usually drives away from the scene after confirming that the vehicle currently has no observable abnormalities such as oil leakage. However, due to the complex and dense internal structure of the vehicle, even a minor collision may cause abnormalities such as deformation of the low-pressure oil circuit and other structures. Although it will not cause oil leakage and other faults in the vehicle in a short period of time, after restarting the vehicle for a period of time, the deformation may cause abnormal operation of the high-pressure oil pump, which is very likely to pose a serious threat to the safety of the vehicle. In this embodiment, after the collision signal is detected, even if it is identified based on the vehicle operation information that the vehicle does not have an operating risk, the abnormal conditions such as excessive oil circuit pressure in the vehicle are still continuously detected for a period of time after the collision (such as 4 hours) to achieve risk tracking. When the duration of abnormal conditions such as excessive oil circuit pressure is too long (such as 2 minutes), it means that a fault that affects the normal operation of the engine system may have occurred after the vehicle collision, resulting in excessive oil circuit pressure, which can indicate that the vehicle has an operating risk. At the same time, parking reminder information can be generated to remind the driver to stop in time and avoid continuing to drive a vehicle with safety hazards.

[0060] In this embodiment, when a collision signal is detected, a fuel cut-off and other safety protection operations are performed on the engine system of the vehicle, which is conducive to timely reducing the risk of fire and the possibility of secondary injury after the vehicle collides, and giving priority to ensuring the safety of the vehicle and personnel after the accident. On this basis, obtaining vehicle operation information is conducive to reflecting actual conditions such as the severity of the vehicle collision, and thus providing an accurate reference basis for assessing whether the vehicle has an operation risk. After identifying that the vehicle has an operation risk and the oil circuit pressure is too high, this embodiment can implement a targeted pressure relief operation. Among them, when the first injector is in an open state, it is used to spray oil into the cylinder in the engine system. When the current high-pressure oil circuit pressure is greater than the first preset pressure threshold, at least one first injector connected to the high-pressure oil circuit in the engine system is used to perform a first pressure relief operation such as controlling the first injector to be in an open state, so as to effectively reduce the high-pressure oil circuit pressure. While reducing the probability of fuel leakage, it is also conducive to avoiding damage to components such as the first injector due to excessive pressure. When the current low-pressure oil circuit pressure is greater than the second preset pressure threshold, at least one preset device connected to the low-pressure oil circuit in the engine system can be used to release pressure according to the preset pressure relief strategy. This embodiment controls the vehicle according to a preset pressure relief strategy, which reduces the probability of fuel leakage and is also compatible with different engine structural characteristics to achieve efficient pressure relief. This is compared to the method of immediately performing a pressure relief operation once the high-pressure oil circuit and / or low-pressure oil circuit pressure is detected to be too high after a collision is detected, or the method of performing a pressure relief operation only after a more serious oil leakage is detected after a collision. This embodiment identifies whether the vehicle has an operating risk based on vehicle operation information, which is conducive to judging the possibility of accidents such as fuel leakage or even fire caused by abnormalities such as excessive oil circuit pressure based on the current actual situation. In this way, this embodiment only performs the corresponding pressure relief operation when there is an operating risk in the vehicle and the oil circuit pressure is detected to be too high, avoiding blindly performing meaningless pressure relief operations, which affects the safety and stability of the vehicle, and is also conducive to eliminating safety hazards before serious accidents such as oil leakage occur, thereby comprehensively improving the safety of the vehicle.

[0061] Optionally, the vehicle operation information includes temperature information and a collision speed of the vehicle when the collision signal is detected; identifying whether the vehicle has an operation risk according to the acquired vehicle operation information includes:

[0062] When the vehicle collision speed is greater than a preset speed, and / or the temperature information meets a preset over-temperature condition, it indicates that the vehicle is at risk of operation; wherein the temperature information includes at least one of the engine water temperature, the engine oil temperature, the intake manifold temperature and the catalyst temperature.

[0063] Specifically, in this embodiment, the vehicle operation information may include temperature information and the vehicle collision speed when the collision signal is detected, wherein the temperature information may include at least one of the engine water temperature, the engine oil temperature, the intake manifold temperature and the catalyst temperature. For a vehicle, at the same collision speed, the greater the vehicle weight, the higher the corresponding kinetic energy, and the more likely there is an operation risk after the collision. Based on this, the collision speed that may cause an operation risk can be set in advance to obtain a preset speed. For example, the speed required for the collision momentum to reach a preset risk momentum (such as the minimum momentum required to cause cracks and deformation in the structure of the vehicle) can be determined in advance according to the range of the vehicle's own weight as the preset speed. After the vehicle collides, the higher the temperature of the engine system components, the higher the possibility of ignition after the fuel leaks, and the corresponding preset risk temperature can be set in advance for different devices in the engine system, thereby obtaining an over-temperature condition. For example, when the temperature information includes the engine water temperature, the preset over-temperature condition may include the engine water temperature exceeding 65°C.

[0064] In this embodiment, it is possible to evaluate whether there is an operational risk after a vehicle collision by judging whether the collision speed of the vehicle at the time of the collision is greater than a preset speed, and / or judging whether the temperature information meets a preset over-temperature condition. Among them, the collision speed of the vehicle at the time of the collision can reflect the level of collision energy when the vehicle collides, which is helpful for evaluating the severity of the collision. When the collision speed of the vehicle is greater than the preset speed, the impact force on the various structures of the vehicle is large, and the probability of abnormalities such as deformation and cracks is high, and the risk of subsequent operation of the vehicle is correspondingly high. After the vehicle collides, temperature information such as engine water temperature, engine oil temperature, intake manifold temperature, and catalyst temperature can reflect the operation of the engine system. When the temperature information meets the preset over-temperature condition, the higher the probability of a fault in the engine system or the probability of igniting leaked fuel, the more likely it is to cause spontaneous combustion of the vehicle, which can indicate that the vehicle has an operational risk.

[0065] Optionally, the first pressure relief operation is performed using at least one first injector connected to the high-pressure oil circuit in the engine system, the first injector comprising:

[0066] The state determination step includes determining the current working state of each cylinder in the engine system according to the vehicle operation information; wherein the current working state includes a combustion state or an uncombustion state;

[0067] According to the current working state of each cylinder and the preset control strategy, at least one first injector is controlled to be in an open state until the current high-pressure oil circuit pressure is less than or equal to the first preset pressure threshold; the first injector wherein the preset control strategy includes, when the cylinder is in an unburned state, controlling the first injector corresponding to the cylinder to be in an open state; when the cylinder is in a burning state, returning to the state determination step.

[0068] Specifically, the high-pressure oil circuit of the engine system in this embodiment is connected to the first fuel injector of each cylinder, thereby providing fuel to each cylinder. When it is necessary to relieve the pressure of the high-pressure oil circuit, the current working state of each cylinder can be determined separately according to the vehicle operation information. For example, in this embodiment, the vehicle operation information may include the current pressure waveform of each cylinder (such as obtained by a pre-set pressure detection device), and the pressure change in the engine cylinder is monitored in real time to determine whether the cylinder is in a combustion state. The pressure waveform within one stroke of the cylinder can be obtained in advance. Assuming that the current position is at the peak position of the pressure waveform, it can correspond to the position where the crankshaft is at the compression top dead center. At this time, the cylinder is generally in the intake stroke that has not yet been ignited. Accordingly, the current working state can be considered to be an unburned state.

[0069] In one embodiment, after determining the current working state of each cylinder, at least one first injector can be controlled to be in an open state based on the current working state and the preset control strategy to reduce the pressure of the high-pressure oil circuit. During this period, the current high-pressure oil circuit pressure can be obtained once every preset time (such as 10ms), and it is determined whether the current high-pressure oil circuit pressure is less than or equal to the first preset threshold. If so, all first injectors can be controlled to be in a closed state. If not, at least one first injector is controlled to be in an open state based on the current working state and the preset control strategy to further reduce the pressure of the high-pressure oil circuit. In this embodiment, the preset control strategy can be set in advance, and when a cylinder is in an unburned state, the first injector corresponding to the cylinder is controlled to be in an open state, which is conducive to releasing the pressure of the high-pressure oil circuit. However, after the vehicle collides, even if the engine system is subjected to safety protection operations such as fuel cut-off, the crankshaft of the engine will continue to move for a period of time under the action of inertia, and the stroke of the cylinder will change. Even if a cylinder is currently in a combustion state (such as in a power stroke), it may switch to other strokes after a period of time, and accordingly, the current working state of the cylinder will also change. Then, when determining that the cylinder is in a combustion state, this embodiment can return to the state determination step (e.g., the vehicle operation information can be obtained again after a preset time interval to re-determine the combustion state of the cylinder), until the current working state of the cylinder is a non-combustion working state, and the first injector corresponding to the cylinder can be opened again to release pressure. Optionally, in this embodiment, when the cylinder is in a combustion state, when returning to the state determination step, it is only necessary to re-determine the current working state corresponding to the cylinder in the combustion state in the last state determination step, which is conducive to avoiding meaningless computing power consumption and improving pressure release efficiency.

[0070] It should be understood that if the current working state of a certain cylinder is still in a combustion state, if it is detected that the current high-pressure oil circuit pressure is less than or equal to the first preset pressure threshold, there is no need to control the first injector corresponding to the cylinder to open subsequently, thereby achieving the effect of completing the first pressure relief operation using at least one first injector.

[0071] In this embodiment, determining the current working state of each cylinder in the engine system according to the vehicle operation information is conducive to providing an effective reference basis for the subsequent reasonable control of the first injector. On the one hand, when the cylinder is in an unburned state, controlling the first injector corresponding to the cylinder to be in an open state is conducive to releasing the fuel in the high-pressure oil circuit into the cylinder, thereby reducing the pressure of the high-pressure oil circuit. On the other hand, when the cylinder is in a burning state, returning to the state determination step avoids opening the first injector to spray oil into the cylinder when the cylinder is in a burning state, resulting in aggravated combustion and causing abnormalities such as knocking, thereby avoiding the pressure relief operation from causing serious damage to the engine system and affecting the safe operation of the vehicle. When it is detected that the cylinder is switched to an unburned state, the corresponding first injector can be opened, which ensures the safety of the first pressure relief operation while also helping to further improve the pressure relief efficiency.

[0072] Optionally, the vehicle operation information includes camshaft operation information and ignition system operation information; and determining the current working state of each cylinder in the engine system according to the vehicle operation information includes:

[0073] For each cylinder, the current stroke of the cylinder is determined according to the camshaft operation information, and the current working state of the cylinder is determined based on the current stroke; wherein, when the current stroke is a compression stroke, and it is determined according to the ignition system operation information that the cylinder is in an ignited state, the current working state is a combustion state.

[0074] Specifically, for a four-stroke cylinder, an operation cycle may include an intake stroke, a compression stroke, a power stroke, and an exhaust stroke, and different strokes often correspond to different rotation angles of the camshaft. The current stroke of the cylinder can be determined based on the camshaft operation information (such as the camshaft angle). For example, the camshaft angle ranges corresponding to different strokes can be obtained in advance. After obtaining the current camshaft angle in actual use, the current stroke of the cylinder can be determined based on the camshaft angle range of the current camshaft angle.

[0075] In one embodiment, the current working state of the cylinder can be determined based on the current stroke of the cylinder. For example, for a four-stroke cylinder, when the current stroke is the intake stroke and the exhaust stroke, it can be determined that the current working state is an unburned state. When the current stroke is the power stroke, it can be determined that the current working state is a combustion state. When the current stroke of the cylinder is a compression stroke, it is necessary to determine whether the ignition device corresponding to the cylinder has completed ignition during the current operation cycle based on the ignition system operation information, and then determine whether the cylinder is in an ignited state. When the current stroke is a compression stroke and the cylinder is in an ignited state, it can be determined that the current working state is a combustion state. Correspondingly, when the current stroke is a compression stroke and the cylinder is in an unfired state, it can be determined that the current working state is an unburned state.

[0076] In this embodiment, the camshaft operation information is helpful to understand the current stroke of each cylinder. When the cylinder is in different strokes, its corresponding combustion state is often different. However, when the current stroke is a compression stroke, the current working state of the cylinder may be a combustion state or an unburned state. When determining that the current stroke is a compression stroke, this embodiment needs to further determine whether the cylinder is in an ignition state based on the ignition system operation information, and then accurately judge the current working state of the cylinder to improve the reliability and accuracy of the current working state.

[0077] Optionally, at least one preset device connected to the low-pressure oil circuit in the engine system is used to release pressure according to a preset pressure relief strategy, including:

[0078] When the preset device is a high-pressure oil pump, the second pressure relief operation is performed using the high-pressure oil pump;

[0079] When the preset device is at least one second fuel injector, the third pressure relief operation is performed using at least one second fuel injector; wherein the second fuel injector is used to inject fuel into the intake manifold in the engine system when it is in an open state;

[0080] When the preset device is a high-pressure oil pump and at least one second fuel injector, the second pressure relief operation is performed using the high-pressure oil pump, and / or the third pressure relief operation is performed using the at least one second fuel injector.

[0081] Specifically, different engine systems have different structural characteristics and are configured with different devices. Accordingly, the preset devices connected to the low-pressure oil circuit in the system are also different. The connection relationship between the low-pressure oil circuit and the preset device in different engine systems is now described with examples:

[0082] (1) In an engine system equipped with, for example, a high-pressure injection unit, the low-pressure oil circuit can be connected to a high-pressure oil pump to supply fuel to the high-pressure oil circuit, and the high-pressure oil circuit can be connected to an injector of a cylinder (i.e., the first injector referred to in this embodiment), thereby supplying fuel to the cylinder of the engine (for ease of understanding and description, this type of engine system is referred to as system one).

[0083] (2) In an engine system equipped with, for example, a low-pressure injection unit, the low-pressure oil circuit may be connected to a second fuel injector, and fuel may be injected into the intake manifold through the second fuel injector, thereby providing a fuel-air mixture to the cylinder (for ease of understanding and description, such an engine system is referred to as system 2). The second fuel injector referred to in this embodiment refers to a fuel injector connected to the low-pressure oil circuit and used to inject fuel into the intake manifold.

[0084] (3) In an engine system that is configured with, for example, a high-pressure injection unit and a low-pressure injection unit, on the one hand, the low-pressure oil circuit can be connected to the high-pressure oil pump to provide fuel to the high-pressure oil circuit, and the high-pressure oil circuit can be connected to the injector of the cylinder (i.e., the first injector in this embodiment), thereby providing fuel to the cylinder of the engine. On the other hand, the low-pressure oil circuit can also be connected to at least one injector (i.e., the second injector in this embodiment), by injecting fuel into the intake manifold in the engine system, thereby providing an oil-gas mixture to the cylinder (for ease of understanding and description, this type of engine system is recorded as system three).

[0085] In one embodiment, in view of the differences in preset devices connected to the low-pressure oil circuit in different engine system structures, the preset pressure relief strategies of the low-pressure oil circuit provided in this embodiment are also different:

[0086] When the preset device is a high-pressure oil pump (corresponding to the above-mentioned system one), the high-pressure oil pump can be used to perform a second pressure relief operation to release the fuel in the low-pressure oil circuit into the high-pressure oil circuit, thereby reducing the current low-pressure oil circuit pressure.

[0087] When the preset device is at least one second injector (corresponding to the above-mentioned system 2), the third pressure relief operation can be performed using at least one second injector. Since the second injector in this embodiment is used to spray fuel into the intake manifold when it is in the open state, and then provide an oil-gas mixture to the cylinder. Then, by controlling the third pressure relief operation such as at least one second injector connected to the low-pressure oil circuit in the engine system to be in the open state, the fuel in the low-pressure oil circuit can be sprayed into the intake manifold to reduce the current low-pressure oil circuit pressure. It should be understood that both the first pressure relief operation and the third pressure relief operation will provide fuel (or oil-gas mixture) to the cylinder. In order to improve the safety of the vehicle, the specific method of performing the third pressure relief operation using at least one second injector in this embodiment is basically the same as the specific method of performing the first pressure relief operation using at least one first injector connected to the high-pressure oil circuit in the engine system, and will not be repeated here.

[0088] When the preset device includes a high-pressure oil pump and at least one second fuel injector (corresponding to the above-mentioned system three), the high-pressure oil pump can be used to perform a second pressure relief operation, and / or the at least one second fuel injector can be used to perform a third pressure relief operation. On the one hand, since the low-pressure oil circuit is connected to the high-pressure oil pump, the fuel in the low-pressure oil circuit can be discharged into the high-pressure oil circuit by, for example, opening the high-pressure oil pump and other second pressure relief operations, thereby reducing the current low-pressure oil circuit pressure. On the other hand, since the low-pressure oil circuit is connected to at least one second fuel injector, and the second fuel injector is used to spray fuel into the intake manifold in the engine system when it is in the open state, the fuel in the low-pressure oil circuit can be discharged into the intake manifold by, for example, opening at least one second fuel injector and other third pressure relief operations, thereby effectively reducing the current low-pressure oil circuit pressure.

[0089] In this embodiment, at least one preset device connected to the low-pressure oil circuit in the engine system is used to release pressure according to the preset pressure relief strategy, which is conducive to adapting to the structural characteristics of different engine systems and achieving efficient and reliable pressure relief. This effectively avoids the safety hazards that may be caused to the operation of the vehicle due to the current low-pressure oil circuit pressure being too high under the premise that the vehicle has operating risks.

[0090] Optionally, performing a second pressure relief operation using a high-pressure oil pump includes:

[0091] The high-pressure oil pump is controlled to operate according to a preset duty cycle until the current low-pressure oil circuit pressure is less than or equal to a second preset pressure threshold, and / or the acquired engine speed is less than a preset speed threshold.

[0092] Specifically, in an engine system equipped with, for example, a high-pressure injection unit, the high-pressure oil circuit can extract fuel from the low-pressure oil circuit through a high-pressure oil pump, and the amount of oil pumped by the high-pressure oil pump is generally proportional to the engine speed (i.e., the speed of the camshaft in the engine system). When the engine speed is greater than a preset speed threshold (such as 500r / min), the rotation of the engine's camshaft can drive the high-pressure oil pump to extract fuel from the low-pressure oil circuit. In this embodiment, when the current low-pressure oil circuit pressure is greater than the second preset pressure threshold, the high-pressure oil pump can be controlled to operate according to a preset duty cycle (such as controlling the high-pressure oil pump according to the maximum duty cycle) to pump the fuel in the low-pressure oil circuit to the high-pressure oil circuit. During this period, the current low-pressure oil circuit pressure and the engine speed (such as obtained by a speed detection device) can be obtained once in each control cycle. When it is determined that the current low-pressure oil circuit pressure is less than or equal to the second preset pressure threshold, and / or the engine speed is less than the preset speed threshold, the high-pressure oil pump can be controlled to stop running.

[0093] Optionally, before controlling the high-pressure oil pump to operate according to a preset duty cycle, the method further includes the following steps:

[0094] Determining whether the engine speed is less than a preset speed threshold;

[0095] If yes, the high pressure oil pump is controlled to stop running;

[0096] If not, the high pressure oil pump is controlled to operate according to the preset duty cycle.

[0097] In this embodiment, controlling the high-pressure oil pump to operate according to a preset duty cycle is conducive to quickly extracting fuel from the low-pressure oil circuit into the high-pressure oil circuit, thereby effectively reducing the pressure of the low-pressure oil circuit. During this period, when the current low-pressure oil circuit pressure is less than or equal to the second preset pressure threshold, it means that the current low-pressure oil circuit pressure has been effectively released, which is conducive to eliminating safety hazards. When the engine speed is less than the preset speed threshold, it is difficult to drive the high-pressure oil pump to continue to extract fuel from the low-pressure oil circuit. At this time, controlling the high-pressure oil pump to stop running is conducive to avoiding damage to components such as the high-pressure oil pump in the engine system and improving the safety of the pressure release process.

[0098] Optionally, the engine system further includes a carbon canister, a throttle, an ignition system and a cooling system; the safety protection operation further includes at least one of closing a flushing valve of the carbon canister, closing the throttle, controlling the ignition system to stop running, and controlling the cooling system to run at a preset power; before performing a first pressure relief operation using at least one first injector connected to the high-pressure oil circuit in the engine system, and / or before performing a third pressure relief operation using at least one second injector, the following steps are also included:

[0099] determining a current amount of air leakage of the throttle valve based on the vehicle operation information;

[0100] When the current leakage amount is greater than a preset permissible threshold, all target injectors are controlled to be in a closed state; wherein the target injectors include at least one of a first injector and a second injector.

[0101] Specifically, the engine system in this embodiment may also include a carbon canister, a throttle, an ignition system and a cooling system. Among them, the carbon canister in the engine system of this embodiment can be connected to the fuel tank on the one hand to collect gasoline vapor. On the other hand, it can be connected to the intake manifold through a flushing valve, and then the adsorbed gasoline vapor is sucked into the combustion chamber for combustion by using the negative pressure generated during the intake stroke of the engine. The throttle referred to in this embodiment is usually located on the intake manifold, and the opening of the throttle can control the air flow entering the engine. Closing the throttle is conducive to preventing air from entering the cylinder of the engine. The ignition system referred to in this embodiment may include spark plugs, ignition coils, etc., which are responsible for igniting the mixture in the cylinder at the appropriate time of the engine. When a collision signal is detected, the ignition system can be controlled to stop running (such as controlling the spark plug to stop magnetizing and igniting). The cooling system referred to in this embodiment may include a water pump, a radiator, and a fan, etc. When a collision signal is detected, the cooling system can be controlled to run for a predetermined time according to a preset power (such as controlling the cooling system to run at maximum power), thereby quickly reducing the temperature of components such as cylinders and exhaust manifolds in the engine system.

[0102] In one embodiment, before executing the first pressure relief operation and / or the third pressure relief operation, the current leakage of the throttle can be determined based on the vehicle operation information. For example, the amount of air actually entering the engine cylinder from the throttle per second can be measured by an air flow detection device or an intake manifold pressure detection device, and the difference between the amount of air actually entering the engine cylinder from the throttle per second and the standard intake amount calculated according to the throttle opening, intake temperature, atmospheric pressure and other information is calculated to obtain the current leakage. On this basis, it can be determined whether the current leakage is greater than a preset permitted threshold (such as 0.03 kg / s). If so, then executing the first pressure relief and / or the third pressure relief operation at this time may cause intense combustion inside the engine cylinder or severe overheating of the catalyst, and all target injectors need to be controlled to be in a closed state. If not, the corresponding first pressure relief and / or third pressure relief operation can be performed. Among them, the target injector includes at least one of the first injector and the second injector, and the target injector can be determined based on the object of the pressure relief operation. For example, when the first pressure relief operation is performed using at least one first injector, the target injectors may include all the first injectors.

[0103] Optionally, when the current leakage is less than or equal to a preset permissible threshold, the corresponding first pressure relief and / or third pressure relief operation is performed, and the step of determining the current leakage of the throttle based on the vehicle operation information is returned until the current low-pressure oil circuit pressure is less than or equal to the second preset pressure threshold. This is conducive to continuously monitoring whether the current leakage of the throttle is greater than the preset permissible threshold during the pressure relief operation, and further ensuring the safety of the first pressure relief operation and / or the third pressure relief operation.

[0104] In this embodiment, after the collision signal is detected, in order to improve the safety of the vehicle, in addition to performing the fuel cut-off operation, the flushing valve of the carbon canister can also be closed to avoid delivering oil and gas to the engine. The throttle is closed to avoid delivering fresh air to the cylinder in the engine system. The ignition system is controlled to stop running to avoid igniting the fuel in the cylinder. The cooling system is controlled to operate to quickly reduce the temperature of components such as cylinders and catalysts in the engine system. While achieving the possibility of continuous combustion inside the engine cylinder after the vehicle collision is cut off in all directions and at multiple angles, it is also beneficial to quickly reduce the temperature of the engine system to avoid accidents such as high temperature causing fires and causing secondary damage to the vehicle and personnel. On this basis, after the throttle is closed, the corresponding opening of the throttle should theoretically be 0%, or within the allowable deviation (such as 2%-5%). However, after the vehicle collides, various components in the engine system (such as the intake manifold or the throttle, etc.) may be deformed, thereby making it impossible for the throttle to be completely closed. At this time, a large amount of air may enter the engine through the throttle that cannot be completely closed. This embodiment determines whether the current air leakage of the throttle is greater than a preset permissible threshold value, which is helpful to understand whether key components such as the throttle are abnormal after a collision (such as deformation after a collision), and then evaluate the safety of performing the first pressure relief operation and / or the third pressure relief operation. It avoids performing the first pressure relief operation and / or the third pressure relief operation when the current air leakage is too large, which may lead to aggravated combustion and affect the safety of the vehicle.

[0105] like Figure 2 As shown, illustratively, a vehicle control method is further introduced with a specific embodiment, and the method includes the following steps:

[0106] (1) When a collision signal is detected, a safety protection operation is performed on the vehicle's engine system;

[0107] (2) Determine whether the vehicle has any operating risk based on the acquired vehicle operating information;

[0108] (3) If not, the current high-pressure oil circuit pressure is updated once every preset time interval based on the vehicle operation information, and the number of updates is accumulated;

[0109] Obtaining a first duration during which the current high-pressure oil circuit pressure is greater than a first pressure threshold;

[0110] Determining whether the first duration is greater than a first preset duration;

[0111] If so, it indicates that the vehicle is at risk of operation and generates a parking reminder message;

[0112] If not, returning to the step of updating the current high-pressure oil circuit pressure once every preset time interval until the number of updates reaches the preset number;

[0113] (4) If yes, detecting the current high-pressure oil circuit pressure and / or the current low-pressure oil circuit pressure based on the vehicle operation information;

[0114] (5) when it is detected based on the vehicle operation information that the current high-pressure oil circuit pressure is greater than a first preset pressure threshold, determining a current air leakage amount of the throttle valve based on the vehicle operation information;

[0115] Determine whether the current air leakage volume is greater than the preset permissible threshold;

[0116] If yes, all the first fuel injectors are controlled to be in a closed state;

[0117] If not, performing a first pressure relief operation using at least one first fuel injector connected to the high-pressure fuel circuit in the engine system, and returning to the step of determining whether the current gas leakage amount is greater than the preset permissible threshold value, until the current high-pressure fuel circuit pressure is less than or equal to the first preset pressure threshold value;

[0118] (6) detecting, based on the vehicle operation information, that the current low-pressure oil circuit pressure is greater than a second preset pressure threshold;

[0119] When the preset device is a high-pressure oil pump, the second pressure relief operation is performed using the high-pressure oil pump;

[0120] When the preset device is at least one second fuel injector, performing a third pressure relief operation using the at least one second fuel injector;

[0121] When the preset device is a high-pressure oil pump and at least one second fuel injector, the second pressure relief operation is performed using the high-pressure oil pump, and / or the third pressure relief operation is performed using the at least one second fuel injector.

[0122] like Figure 3 As shown, a vehicle control device 300 provided by an embodiment of the present invention includes:

[0123] A collision detection module 310, which is used to perform a safety protection operation on the engine system of the vehicle when a collision signal is detected, and to identify whether the vehicle has an operating risk according to the acquired vehicle operating information; wherein the safety protection operation includes a fuel cut-off operation;

[0124] A first pressure relief module 320, which is used to perform a first pressure relief operation using at least one first fuel injector connected to the high-pressure fuel circuit in the engine system when the vehicle has the operating risk and detects that the current high-pressure fuel circuit pressure is greater than a first preset pressure threshold based on the vehicle operating information; wherein the first fuel injector is used to inject fuel into a cylinder in the engine system when it is in an open state;

[0125] The second pressure relief module 330 is used to relieve pressure using at least one preset device connected to the low-pressure oil circuit in the engine system according to a preset pressure relief strategy when the vehicle is at the operating risk and detects based on the vehicle operating information that the current low-pressure oil circuit pressure is greater than a second preset pressure threshold.

[0126] The technical effects that can be produced by the vehicle control device and vehicle control method provided in this embodiment are basically the same, and will not be repeated here.

[0127] like Figure 4 As shown, a vehicle 400 provided by an embodiment of the present invention includes a memory 410 and a processor 420; the memory 410 is used to store a computer program; the processor 420 is used to implement the vehicle control method as described above when executing the computer program.

[0128] In other words, a vehicle 400 includes a memory 410 and a processor 420 coupled to the memory 410; the memory 410 is configured to store a computer program; and the processor 420 is configured to perform the following operations when executing the computer program:

[0129] When a collision signal is detected, a safety protection operation is performed on the engine system of the vehicle, and whether the vehicle has an operating risk is identified based on the acquired vehicle operating information; wherein the safety protection operation includes a fuel cut-off operation;

[0130] When the vehicle has the operating risk and it is detected based on the vehicle operating information that the current high-pressure oil circuit pressure is greater than a first preset pressure threshold, a first pressure relief operation is performed using at least one first injector connected to the high-pressure oil circuit in the engine system; wherein the first injector is used to inject oil into a cylinder in the engine system when in an open state;

[0131] When the vehicle has the operating risk and it is detected based on the vehicle operating information that the current low-pressure oil circuit pressure is greater than a second preset pressure threshold, pressure relief is performed using at least one preset device connected to the low-pressure oil circuit in the engine system according to a preset pressure relief strategy.

[0132] The technical effects that can be produced by the vehicle and vehicle control method provided in this embodiment are basically the same, and will not be repeated here.

[0133] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the vehicle control method as described above is implemented.

[0134] In other words, a non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor performs the following operations:

[0135] When a collision signal is detected, a safety protection operation is performed on the engine system of the vehicle, and whether the vehicle has an operating risk is identified based on the acquired vehicle operating information; wherein the safety protection operation includes a fuel cut-off operation;

[0136] When the vehicle has the operating risk and it is detected based on the vehicle operating information that the current high-pressure oil circuit pressure is greater than a first preset pressure threshold, a first pressure relief operation is performed using at least one first injector connected to the high-pressure oil circuit in the engine system; wherein the first injector is used to inject oil into a cylinder in the engine system when in an open state;

[0137] When the vehicle has the operating risk and it is detected based on the vehicle operating information that the current low-pressure oil circuit pressure is greater than a second preset pressure threshold, pressure relief is performed using at least one preset device connected to the low-pressure oil circuit in the engine system according to a preset pressure relief strategy.

[0138] The computer-readable storage medium and the vehicle control method provided in this embodiment can produce substantially the same technical effects, which will not be elaborated herein.

[0139] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc. In the present application, the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment of the present invention. In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0140] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A vehicle control method, characterized in that: include: When a collision signal is detected, a safety protection operation is performed on the engine system of the vehicle, and whether the vehicle has an operating risk is identified based on the acquired vehicle operating information; wherein the safety protection operation includes a fuel cut-off operation; When the vehicle has the operating risk and it is detected based on the vehicle operating information that the current high-pressure oil circuit pressure is greater than a first preset pressure threshold, a first pressure relief operation is performed using at least one first injector connected to the high-pressure oil circuit in the engine system; wherein the first injector is used to inject oil into a cylinder in the engine system when in an open state; When the vehicle has the operating risk and it is detected based on the vehicle operating information that the current low-pressure oil circuit pressure is greater than a second preset pressure threshold, pressure relief is performed using at least one preset device connected to the low-pressure oil circuit in the engine system according to a preset pressure relief strategy.

2. The vehicle control method according to claim 1, characterized in that: The vehicle operation information includes temperature information and a collision speed of the vehicle when the collision signal is detected; The step of identifying whether the vehicle has an operation risk according to the acquired vehicle operation information includes: When the collision speed of the vehicle is greater than a preset speed, and / or the temperature information satisfies a preset over-temperature condition, it indicates that the vehicle has the operating risk; wherein the temperature information includes at least one of the engine water temperature, the engine oil temperature, the intake manifold temperature and the catalyst temperature.

3. The vehicle control method according to claim 1, characterized in that: The method of performing a first pressure relief operation by using at least one first injector connected to a high-pressure oil circuit in the engine system includes: The state determination step includes determining the current working state of each cylinder in the engine system according to the vehicle operation information; wherein the current working state includes a combustion state or an uncombustion state; According to the current working state of each cylinder and the preset control strategy, at least one of the first injectors is controlled to be in the open state until the current high-pressure oil circuit pressure is less than or equal to the first preset pressure threshold; wherein the preset control strategy includes, when the cylinder is in the unburned state, controlling the first injector corresponding to the cylinder to be in the open state; when the cylinder is in the combustion state, returning to the state determination step.

4. The vehicle control method according to claim 3, characterized in that: The vehicle operation information includes camshaft operation information and ignition system operation information; and determining the current working state of each cylinder in the engine system according to the vehicle operation information includes: For each of the cylinders, the current stroke of the cylinder is determined according to the camshaft operating information, and the current working state of the cylinder is determined based on the current stroke; wherein, when the current stroke is a compression stroke, and it is determined according to the ignition system operating information that the cylinder is in an ignited state, the current working state is the combustion state.

5. The vehicle control method according to claim 1, characterized in that: The method of performing pressure relief according to a preset pressure relief strategy by using at least one preset device connected to the low-pressure oil circuit in the engine system includes: When the preset device is a high-pressure oil pump, the second pressure relief operation is performed by using the high-pressure oil pump; When the preset device is at least one second fuel injector, a third pressure relief operation is performed using at least one second fuel injector; wherein the second fuel injector is used to inject fuel into an intake manifold in the engine system when in the open state; When the preset device is a high-pressure oil pump and at least one of the second fuel injectors, the second pressure relief operation is performed using the high-pressure oil pump, and / or the third pressure relief operation is performed using at least one of the second fuel injectors.

6. The vehicle control method according to claim 5, characterized in that: The performing of the second pressure relief operation by using the high-pressure oil pump comprises: The high-pressure oil pump is controlled to operate according to a preset duty cycle until the current low-pressure oil circuit pressure is less than or equal to the second preset pressure threshold, and / or the acquired engine speed is less than a preset speed threshold.

7. The vehicle control method according to claim 5, characterized in that: The engine system further includes a carbon canister, a throttle, an ignition system and a cooling system; the safety protection operation further includes at least one of closing a flushing valve of the carbon canister, closing the throttle, controlling the ignition system to stop running, and controlling the cooling system to run at a preset power; before performing a first pressure relief operation using at least one first injector connected to a high-pressure oil circuit in the engine system, and / or before performing a third pressure relief operation using at least one second injector, the process further includes: determining a current air leakage amount of the throttle valve based on the vehicle operation information; When the current leakage amount is greater than a preset permissible threshold, all target injectors are controlled to be in a closed state; wherein the target injectors include at least one of the first injector and the second injector.

8. A vehicle control device, characterized in that: include: A collision detection module, which is used to perform a safety protection operation on the engine system of the vehicle when a collision signal is detected, and to identify whether the vehicle has an operating risk based on the acquired vehicle operating information; wherein the safety protection operation includes a fuel cut-off operation; a first pressure relief module, which is used to perform a first pressure relief operation using at least one first fuel injector connected to the high-pressure fuel circuit in the engine system when the vehicle has the operating risk and detects that the current high-pressure fuel circuit pressure is greater than a first preset pressure threshold based on the vehicle operating information; wherein the first fuel injector is used to spray fuel into a cylinder in the engine system when it is in an open state; A second pressure relief module is used to relieve pressure using at least one preset device connected to the low-pressure oil circuit in the engine system according to a preset pressure relief strategy when the vehicle is at the operating risk and detects based on the vehicle operating information that the current low-pressure oil circuit pressure is greater than a second preset pressure threshold.

9. A vehicle, characterized in that: including memory and processor; The memory is used to store computer programs; The processor is configured to implement the vehicle control method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the vehicle control method according to any one of claims 1 to 7 is implemented.

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