Engine combustion determination method, apparatus and device, and storage medium

Abstract

An engine combustion determination method, apparatus and device, and a storage medium. The engine combustion determination method comprises: when a requested torque of a target generator satisfies a combustion determination enabling condition corresponding to a power-split mode, acquiring an engine acting torque, a target generator acting torque and a ring gear acting torque (S10); on the basis of the engine acting torque, the target generator acting torque and the ring gear acting torque, determining a planetary gearset resultant torque (S20); and on the basis of the planetary gearset resultant torque and a resultant torque threshold value, performing combustion state determination on a target engine, and on the basis of a state determination result, determining the combustion state of the target engine (S30).

Description

Engine combustion judgment method, device, equipment and storage medium

[0001] Related applications

[0002] The present application claims priority to Chinese patent application No. 202410951385.3, filed on July 16, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of vehicles, in particular to an engine combustion judgment method, device, equipment and storage medium. BACKGROUND

[0004] On a hybrid vehicle, there are multiple power sources, in addition to the engine, there are also generators and drive motors that can provide power sources. In the case of certain engine failures or near oil shortage, there is no combustion or incomplete combustion, the vehicle can still move forward by outputting torque through the drive motor, and the engine can still operate at high speed under the drive of the generator. If the engine combustion state cannot be accurately identified, too much unburned fuel will enter the catalyst, and when the catalyst and temperature reach a certain degree, spontaneous combustion will occur, which may cause the catalyst to be ablated and blocked. In the current market, the main modes of engine operation in the hybrid assembly architecture are: series, parallel, and power split. In the power split mode, the engine, generator, and drive motor are always in a coupled relationship, and the speed and torque between the three are mutually influenced. However, there is currently only combustion judgment of the engine in series and parallel modes of the vehicle, and there is an urgent need for an accurate judgment method for the combustion state of the engine in the power split mode.

[0005] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art.

[0006] SUMMARY

[0007] The main purpose of the present application is to provide an engine combustion judgment method, device, equipment and storage medium, which aims to solve the technical problem that the combustion state of the engine in the power split mode cannot be accurately judged in the prior art.

[0008] To achieve the above purpose, the present application provides an engine combustion judgment method, which comprises:

[0009] When the requested torque of the target generator meets the combustion judgment enabling condition corresponding to the power split mode, the engine acting torque, the target generator acting torque, and the ring gear acting torque are obtained;

[0010] The planetary row torque resultant force is determined according to the engine acting torque, the target generator acting torque, and the ring gear acting torque.

[0011] judging the combustion state of the target engine according to the planetary row torque resultant force and the torque resultant force threshold, and determining the combustion state of the target engine according to the state judgment result.

[0012] In an embodiment, before the engine acting torque, the target generator acting torque and the ring gear acting torque are acquired, the method further comprises:

[0013] acquiring an engine calculation torque, an output torque of a target generator and a current acceleration;

[0014] determining the engine acting torque according to torque calculation of the engine calculation torque;

[0015] determining the target generator acting torque according to torque calculation of the output torque;

[0016] determining the ring gear acting torque according to torque calculation of the current acceleration.

[0017] In an embodiment, the determining the engine acting torque according to torque calculation of the engine calculation torque comprises:

[0018] acquiring an engine moment of inertia of the target engine and an engine speed change rate of the target engine;

[0019] determining an engine inertia acting force of the target engine according to the engine moment of inertia and the engine speed change rate;

[0020] determining the engine acting torque according to torque calculation of the engine inertia acting force and the engine calculation torque.

[0021] In an embodiment, the determining the target generator acting torque according to torque calculation of the output torque comprises:

[0022] acquiring a generator moment of inertia of the target generator, a generator speed change rate of the target generator and a first transmission coefficient;

[0023] determining a generator inertia acting force of the target generator according to the generator moment of inertia and the generator speed change rate;

[0024] determining the target generator acting torque according to torque calculation of the generator inertia acting force, the first transmission coefficient and the output torque.

[0025] In an embodiment, the determining the ring gear acting torque according to torque calculation of the current acceleration comprises:

[0026] obtaining a total vehicle mass, a vehicle tire radius, and a second transmission coefficient;

[0027] performing torque calculation according to the total vehicle mass, the vehicle tire radius, the second transmission coefficient, and the current acceleration to determine a ring gear acting torque.

[0028] In an embodiment, the determining the combustion state of the target engine according to the planetary gear set torque resultant and the torque resultant threshold, and determining the combustion state of the target engine according to the state determination result, comprises:

[0029] determining the combustion state of the target engine according to the planetary gear set torque resultant and the torque resultant threshold;

[0030] when the state determination result is that the absolute value of the planetary gear set torque resultant is greater than the torque resultant threshold, determining a state duration;

[0031] when the state duration is greater than a duration threshold, determining that the combustion state of the target engine is an unburned state.

[0032] In an embodiment, after the determining the combustion state of the target engine according to the planetary gear set torque resultant and the torque resultant threshold, the method further comprises:

[0033] when the state determination result is that the absolute value of the planetary gear set torque resultant is not greater than the torque resultant threshold, determining that the combustion state of the target engine is a normal combustion state.

[0034] In an embodiment, before the obtaining the engine acting torque, the target generator acting torque, and the ring gear acting torque when the requested torque of the target generator meets the combustion determination enabling condition corresponding to the power split mode, the method further comprises:

[0035] determining a current operating mode according to vehicle mode control information;

[0036] when the current operating mode is the power split mode, obtaining the requested torque of the target generator;

[0037] when the absolute value of the requested torque of the target generator is less than a requested torque threshold, determining that the requested torque of the target generator meets the combustion determination enabling condition in the power split mode.

[0038] In an embodiment, after the determining the combustion state of the target engine according to the planetary gear set torque resultant and the torque resultant threshold, and determining the combustion state of the target engine according to the state determination result, the method further comprises:

[0039] When the target engine is in an unburned state, a combustion warning message is generated based on the resultant torque of the planetary gear set.

[0040] The combustion warning message is sent to the vehicle display interface to alert the user to the combustion status.

[0041] In addition, to achieve the above objectives, this application also proposes an engine combustion judgment device, which includes: an acquisition module, used to acquire the engine operating torque, the target generator operating torque, and the gear ring operating torque when the requested torque of the target generator meets the combustion judgment enabling condition corresponding to the power split mode;

[0042] The processing module is used to determine the resultant torque of the planetary gear set based on the operating torque of the engine, the operating torque of the target generator, and the operating torque of the ring gear.

[0043] The judgment module is used to judge the combustion state of the target engine based on the resultant torque of the planetary gear set and the resultant torque threshold, and to determine the combustion state of the target engine based on the judgment result.

[0044] In addition, to achieve the above objectives, this application also proposes an engine combustion judgment device, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the engine combustion judgment method as described above.

[0045] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the engine combustion determination method described above.

[0046] This application provides a method for determining engine combustion. When the requested torque of the target generator meets the combustion determination enabling condition corresponding to the power split mode, this application acquires the engine's operating torque, the target generator's operating torque, and the ring gear's operating torque. Based on these torques, the planetary gear set torque resultant force is determined. The combustion state of the target engine is then determined based on the planetary gear set torque resultant force and a torque resultant force threshold, and the combustion state of the target engine is confirmed according to the state determination result. By calculating the planetary gear set torque resultant force based on multiple torques when the requested torque meets the combustion determination enabling condition corresponding to the power split mode, and determining the combustion state using the planetary gear set torque resultant force and a torque resultant force threshold, this method can accurately identify the engine's combustion state in the power split mode, determine whether the engine is truly burning, avoid catalyst erosion and blockage, and improve the safety of the hybrid control system. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0048] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 is a flowchart of the first embodiment of the engine combustion determination method of this application;

[0050] Figure 2 is a flowchart of the second embodiment of the engine combustion determination method of this application;

[0051] Figure 3 is a flowchart of the third embodiment of the engine combustion determination method of this application;

[0052] Figure 4 is a flowchart of the fourth embodiment of the engine combustion determination method of this application;

[0053] Figure 5 is a simplified flowchart of the engine combustion judgment method provided in the fourth embodiment of this application;

[0054] Figure 6 is a schematic diagram of the module structure of the engine combustion judgment device according to an embodiment of this application;

[0055] Figure 7 is a schematic diagram of the hardware operating environment involved in the engine combustion judgment method in this application embodiment.

[0056] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0057] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0058] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0059] The main solution of this application embodiment is as follows: when the requested torque of the target generator meets the combustion judgment enable condition corresponding to the power split mode, the engine operating torque, the target generator operating torque, and the gear ring operating torque are obtained; the planetary gear set torque resultant force is determined based on the engine operating torque, the target generator operating torque, and the gear ring operating torque; the combustion state of the target engine is judged based on the planetary gear set torque resultant force and the torque resultant force threshold, and the combustion state of the target engine is determined based on the state judgment result.

[0060] In cases of engine malfunction or near-fuel shortage, where there is no combustion or incomplete combustion, the vehicle can still propel itself forward using the drive motor's torque output. Driven by the generator, the engine can still run at high speeds. If the engine's combustion state cannot be accurately identified, excessive unburned fuel will enter the catalyst, potentially causing spontaneous combustion when the catalyst reaches a certain temperature. In severe cases, this can lead to catalyst ablation and blockage. Currently, in hybrid powertrain architectures, the main engine operating modes are series, parallel, and power-split. In power-split mode, the engine, generator, and drive motor are always coupled, and their speeds and torques influence each other. However, current methods only assess engine combustion in series and parallel modes; a more accurate method for assessing engine combustion in power-split mode is urgently needed.

[0061] This application calculates the resultant torque of the planetary gear set based on multiple torques when the requested torque meets the combustion judgment enable condition corresponding to the power split mode. The combustion state is judged by the resultant torque of the planetary gear set and the torque resultant force threshold. This can accurately identify the combustion state of the engine in the power split mode, determine whether the engine is actually burning, avoid the situation of catalyst erosion and blockage, and improve the safety of the hybrid control system.

[0062] The executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device or engine combustion detection device capable of performing the above functions. The following description uses an engine combustion detection device as an example to illustrate this embodiment and the subsequent embodiments.

[0063] Based on this, the present application provides an engine combustion judgment method. Referring to Figure 1, Figure 1 is a flowchart of the first embodiment of the engine combustion judgment method of the present application.

[0064] In this embodiment, the method includes steps S10 to S30:

[0065] Step S10: When the requested torque of the target generator meets the combustion judgment enable condition corresponding to the power split mode, obtain the engine operating torque, the target generator operating torque, and the gear ring operating torque.

[0066] In this embodiment, the combustion judgment enable condition corresponding to the power split mode refers to the absolute value of the requested torque MP1-Req of generator P1, |MP1-Req|, being less than a certain value MK1. The target generator refers to generator P1 in the hybrid control system. Engine operating torque MP-ice refers to the engine operating torque on the planetary gear set, target generator operating torque MP-P1 refers to the operating torque of generator P1 on the planetary gear set, and ring gear operating torque MP-Ring refers to the operating torque of the ring gear on the planetary gear set. In this embodiment, MK1 is a pre-set requested torque threshold.

[0067] When the vehicle enters power split mode, in order to maintain target speed control when the engine cannot ignite, the P1 generator's requested torque MP1-Req will fluctuate within a small range to regulate the engine speed. It is determined whether the requested torque of the target generator meets the combustion judgment enable condition corresponding to the power split mode. If so, the engine's applied torque, the target generator's applied torque, and the gear ring's applied torque are acquired; otherwise, the engine combustion judgment is exited.

[0068] Step S20: Determine the resultant torque of the planetary gear set based on the engine's operating torque, the target generator's operating torque, and the ring gear's operating torque;

[0069] Based on the engine torque MP-ice, the target generator torque MP-P1, and the gear ring torque MP-Ring, the resultant torque MP on the planetary gear set can be calculated as MP = MP-ice + MP-P1 + MP-Ring.

[0070] Step S30: Determine the combustion state of the target engine based on the resultant torque of the planetary gear set and the resultant torque threshold, and determine the combustion state of the target engine based on the state determination result.

[0071] Typically, when the engine's calculated torque is accurate, the resultant torque MP of the planetary gear set is close to zero or within a certain torque range. If |MP| is greater than a certain value MK2 and remains so for a certain time T, the engine is determined to be in an unburned state. Conversely, if |MP| is less than |MK2|, the engine is in a normal combustion state. In this embodiment, the unburned state includes both non-combustion and incomplete combustion, and MK2 is a pre-set torque resultant threshold. The target engine refers to the engine in the hybrid control system that requires combustion state determination.

[0072] In one implementation, after step S30, steps A11 to A12 may also be included:

[0073] Step A11: When the combustion state of the target engine is unburned, generate combustion warning information based on the resultant torque of the planetary gear set.

[0074] Step A12: Send the combustion warning information to the vehicle display interface to warn of the combustion status.

[0075] When the target engine is in an unburned state, a combustion warning message is generated based on the resultant torque of the planetary gear set and the duration for which the resultant torque of the planetary gear set exceeds the torque resultant threshold. A warning sign is then generated based on the combustion warning message, and the warning sign is displayed on the vehicle's display interface. At the same time, the combustion warning message is sent to the user's terminal, allowing the user to intuitively understand the combustion warning message and thus enabling the user to know the combustion status of the target engine, thereby completing the combustion status warning for the target engine.

[0076] In this embodiment, when the target engine is in an unburned state, a combustion warning message is generated based on the combined torque of the planetary gear set; this message is then sent to the vehicle display interface to alert the user to the combustion status. This method allows the user to intuitively and promptly obtain information about the engine's combustion status and take appropriate measures, ensuring the safety of the hybrid control system.

[0077] This embodiment provides an engine combustion judgment method. When the requested torque of the target generator meets the combustion judgment enabling condition corresponding to the power split mode, this embodiment acquires the engine's operating torque, the target generator's operating torque, and the gear ring's operating torque. Based on these torques, the planetary gear set torque resultant force is determined. The combustion state of the target engine is judged based on the planetary gear set torque resultant force and a torque resultant force threshold, and the combustion state of the target engine is determined according to the state judgment result. Through this method, when the requested torque meets the combustion judgment enabling condition corresponding to the power split mode, the planetary gear set torque resultant force is calculated based on multiple torques. The combustion state is judged using the planetary gear set torque resultant force and a torque resultant force threshold. This accurately identifies the engine's combustion state in the power split mode, determines whether the engine is truly burning, avoids catalyst erosion and blockage, and improves the safety of the hybrid control system.

[0078] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to the first embodiment can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to Figure 2. In step S10, before obtaining the engine operating torque, the target generator operating torque, and the gear ring operating torque, the engine combustion determination method further includes steps S11 to S14:

[0079] Step S11: Obtain the calculated torque of the engine, the output torque of the target generator, and the current acceleration;

[0080] In the engine control system, the calculated engine torque Mice is primarily calculated based on the actual intake air volume, the actual controlled fuel injection quantity under the fuel-to-air ratio control calibrated on the test bench, and the actual controlled ignition angle under the corresponding operating conditions. However, the system cannot monitor whether the injectors or ignition devices are actually injecting fuel or igniting. In the target speed control of a hybrid control system, the engine output torque is adjusted by regulating the engine intake air volume. If the engine's fuel injection or ignition system malfunctions, the calculated engine torque Mice will differ significantly from the actual torque. When combustion fails, the actual torque will be the engine's operating resistance torque.

[0081] The output torque of the target generator refers to the torque MP1-Act of generator P1. The motor control system can monitor the accuracy of the torque of generator P1 in real time. The torque accuracy of generator P1's torque MP1-Act is usually stronger than that of the engine control torque, and the following performance is very good. MP1-Act basically follows the requested torque MP1-Req of generator P1.

[0082] In practice, the current acceleration refers to the vehicle's acceleration at this moment. When the vehicle is moving at a constant speed, the acceleration is 0. The current acceleration is a vector with direction.

[0083] Step S12: Calculate the torque based on the calculated engine torque to determine the engine's operating torque;

[0084] By using the engine's calculated torque Mice and combining it with the inertial force caused by the change in the target engine's speed, the engine's applied torque MP-ice can be calculated.

[0085] In one embodiment, step S12 may include steps B11 to B13:

[0086] Step B11: Obtain the engine moment of inertia and engine speed change rate of the target engine;

[0087] Step B12: Determine the engine inertia force of the target engine based on the engine's moment of inertia and the engine's rate of change of rotational speed;

[0088] Step B13: Calculate the torque based on the engine's inertial force and the engine's calculated torque to determine the engine's operating torque.

[0089] The inertial force exerted by the change in engine speed of the target engine is determined based on the engine rotational inertia Jice and the rate of change of engine speed dnice. The inertial force exerted by the change in engine speed of the target engine is the engine inertial force of the target engine.

[0090] By using the engine inertia force of the target engine and combining it with the engine calculated torque Mice, the engine torque is calculated to obtain the engine torque on the planetary gear set.

[0091] In this embodiment, the engine's moment of inertia and rate of change of engine speed are obtained; the engine inertia force of the target engine is determined based on the engine's moment of inertia and rate of change of engine speed; and torque is calculated based on the engine inertia force and the calculated engine torque to determine the engine's applied torque. This method ensures the accuracy of the engine's applied torque, laying the foundation for the subsequent torque resultant force to accurately reflect the engine's combustion state.

[0092] The above is only one possible implementation of step S12 provided in this embodiment. This embodiment does not specifically limit the specific implementation of step S12.

[0093] Step S13: Calculate the torque based on the output torque to determine the target generator's operating torque;

[0094] By using the output torque MP1-Act of the target generator and the inertial force caused by the change in the speed of generator P1, the torque MP-P1 of the target generator can be calculated.

[0095] In one embodiment, step S13 may include steps C11 to C13:

[0096] Step C11: Obtain the generator moment of inertia, the generator speed change rate of the target generator, and the first transmission coefficient of the target generator;

[0097] Step C12: Determine the generator inertia force of the target generator based on the generator's moment of inertia and the generator's rate of change of rotational speed;

[0098] Step C13: Calculate the torque based on the generator inertia force, the first transmission coefficient, and the output torque to determine the target generator's operating torque.

[0099] The inertial force of the target generator due to the change in generator speed is determined based on the generator rotational inertia JP1 and the generator speed change rate dnP1. The inertial force of the target generator due to the change in generator speed is the generator inertial force of the target generator.

[0100] The generator torque is calculated by combining the generator inertia force of the target generator with the first transmission coefficient KP1 and the output torque MP1-Act of the target generator, thus obtaining the generator torque on the planetary gear set. In this embodiment, the first transmission coefficient KP1 refers to the transmission coefficient of the sun gear torque to the planetary gear set, which is determined according to the transmission coefficient of the ECVT (Electrical Continuously Variable Transmission) structure, for example, 3.6. This embodiment does not limit the specific value of the first transmission coefficient.

[0101] This embodiment obtains the generator moment of inertia, the generator speed change rate, and a first transmission coefficient of the target generator; determines the generator inertia force of the target generator based on the generator moment of inertia and the generator speed change rate; and calculates the torque applied by the target generator based on the generator inertia force, the first transmission coefficient, and the output torque. This method ensures the accuracy of the target generator's applied torque, laying the foundation for the subsequent torque resultant force to accurately reflect the engine's combustion state.

[0102] The above is only one possible implementation of step S13 provided in this embodiment. This embodiment does not specifically limit the specific implementation of step S13.

[0103] Step S14: Calculate the torque based on the current acceleration to determine the torque applied by the gear ring.

[0104] When the vehicle is in a constant-speed steady state, the net force acting on the gear ring is almost zero. If the vehicle is accelerating or decelerating, the gear ring exerts an inertial force on the planetary gear set. Since the gear ring is coupled to the wheel end, the torque MP-Ring acting on the gear ring of the planetary gear set can be calculated using the current acceleration of the vehicle.

[0105] In one embodiment, step S14 may further include steps D11 to D12:

[0106] Step D11: Obtain the vehicle curb weight, vehicle tire radius, and second transmission coefficient;

[0107] Step D12: Calculate the torque applied by the gear ring based on the vehicle's curb weight, the vehicle's tire radius, the second transmission coefficient, and the current acceleration.

[0108] The torque applied by the ring gear is determined by calculating the torque based on the vehicle's curb weight M, tire radius R, current acceleration, and the second transmission coefficient KRing. In this embodiment, the second transmission coefficient KRing refers to the transmission coefficient from the planetary gear set to the wheel ends in the power split mode, for example, 2.54. This embodiment does not limit the specific value of the second transmission coefficient.

[0109] This embodiment obtains the vehicle's curb weight, tire radius, and a second transmission coefficient; based on the vehicle's curb weight, tire radius, second transmission coefficient, and current acceleration, torque is calculated to determine the torque applied by the gear ring. This method ensures the accuracy of the gear ring's applied torque, laying the foundation for the subsequent torque resultant force to accurately reflect the engine's combustion state.

[0110] The above is only one implementation of step S14 provided in this embodiment. This embodiment does not specifically limit the specific implementation of step S14.

[0111] This embodiment provides a method for determining engine combustion. This embodiment acquires the calculated engine torque, the output torque of the target generator, and the current acceleration; it then performs torque calculation based on the calculated engine torque to determine the engine's applied torque; it performs torque calculation based on the output torque to determine the target generator's applied torque; and it performs torque calculation based on the current acceleration to determine the gear ring's applied torque. Through this method, the engine's applied torque, the target generator's applied torque, and the gear ring's applied torque can be accurately calculated, laying the foundation for the subsequent torque resultant force to accurately reflect the engine's combustion state.

[0112] Based on the first and / or second embodiments of this application, in the third embodiment of this application, the content that is the same as or similar to the first and second embodiments described above can be referred to the above description and will not be repeated hereafter. Based on this, please refer to Figure 3, step S30, the engine combustion judgment method further includes steps S31 to S33:

[0113] Step S31: Determine the combustion state of the target engine based on the resultant torque of the planetary gear set and the resultant torque threshold.

[0114] In one implementation, step E11 may be included after step S31:

[0115] Step E11: When the state judgment result is that the absolute value of the resultant torque of the planetary gear set is not greater than the resultant torque threshold, the combustion state of the target engine is determined to be normal combustion state.

[0116] When the absolute value of the resultant torque force of the planetary gear set |MP| is not greater than the torque resultant force threshold MK2; or when the absolute value of the resultant torque force of the planetary gear set |MP| is greater than the torque resultant force threshold MK2, but the duration of the absolute value of the resultant torque force of the planetary gear set |MP| being greater than the torque resultant force threshold MK2 does not exceed the set duration threshold T, it indicates that the combustion state of the target engine is normal combustion state.

[0117] This embodiment determines the combustion state of the target engine to be normal combustion state when the absolute value of the resultant torque force of the planetary gear set is not greater than the resultant torque force threshold. This method ensures the accuracy of the combustion state determination.

[0118] Step S32: When the state judgment result is that the absolute value of the resultant torque force of the planetary gear set is greater than the resultant torque force threshold, determine the state duration;

[0119] Step S33: When the duration of the state is greater than the duration threshold, the combustion state of the target engine is determined to be an unburned state.

[0120] Typically, when the engine's calculated torque is accurate, the resultant torque MP of the planetary gear set is close to zero or within a certain torque range. If the absolute value of the resultant torque |MP| is greater than the torque resultant force threshold MK2, and the duration for which the absolute value of the resultant torque |MP| is greater than the torque resultant force threshold MK2 exceeds a set duration threshold T, it indicates that the target engine's combustion state is an unburned state. In this embodiment, the state duration refers to the duration for which the absolute value of the resultant torque |MP| is greater than the torque resultant force threshold MK2.

[0121] This embodiment provides a method for determining engine combustion. This embodiment determines the combustion state of a target engine based on the resultant torque of the planetary gear set and a torque resultant threshold. When the absolute value of the resultant torque of the planetary gear set is greater than the torque resultant threshold, the duration of the state is determined. When the duration of the state is greater than the duration threshold, the combustion state of the target engine is determined to be an unburned state. Through this method, the combustion state of the engine can be accurately determined.

[0122] Based on the first and / or second and / or third embodiments of this application, in the fourth embodiment of this application, the content that is the same as or similar to the first, second, and third embodiments described above can be referred to the above description and will not be repeated hereafter. Based on this, please refer to Figure 4. Before step S10, the engine combustion determination method further includes steps S01 to S03:

[0123] Step S01: Determine the current operating mode based on the vehicle mode control information;

[0124] Vehicle mode control information includes, but is not limited to, information such as the mode flag corresponding to the current vehicle operating mode, vehicle speed, engine operating status, and generator operating status. The current operating mode of the vehicle's engine is determined through vehicle mode control information. The main engine operating modes include series, parallel, and power-split modes.

[0125] Step S02: When the current operating mode is power split mode, obtain the requested torque of the target generator;

[0126] Step S03: When the absolute value of the requested torque of the target generator is less than the requested torque threshold, it is determined that the requested torque of the target generator meets the combustion judgment enable condition in the power split mode.

[0127] When the current operating mode of the vehicle engine is power split mode, the requested torque MP1-Req of the target generator P1 is obtained. If the absolute value of the requested torque of the target generator P1, |MP1-Req|, is less than the requested torque threshold MK1, it means that the requested torque of the target generator P1 meets the combustion judgment enable condition in the power split mode. At this time, the judgment of the engine combustion state is entered. If |MP1-Req| is not less than the requested torque threshold MK1, the judgment is exited.

[0128] This embodiment provides an engine combustion determination method. This embodiment determines the current operating mode based on vehicle mode control information; when the current operating mode is a power split mode, it obtains the requested torque of the target generator; when the absolute value of the requested torque of the target generator is less than a requested torque threshold, it determines that the requested torque of the target generator meets the combustion determination enabling condition in the power split mode. Through the above method, it is possible to accurately determine whether the requested torque of the target generator P1 meets the combustion determination enabling condition in the power split mode, laying the foundation for subsequent engine combustion determination.

[0129] To help understand the implementation flow of the engine combustion judgment method obtained by combining the first, second, and third embodiments described above, please refer to Figure 5. Figure 5 provides a simplified flowchart of the engine combustion judgment method, specifically:

[0130] In power-split mode, the engine torque on the planetary gear set is partially transmitted to the sun gear (where the P1 generator is located) and partially to the ring gear (where the P3 drive motor is located) through the planetary carrier structure. If the resultant torque force of the planetary carrier structure system is unbalanced, it will cause the planetary carrier structure system to experience runaway. This embodiment determines whether the engine torque is accurate by monitoring the resultant torque force on the planetary gear set in the planetary carrier system. Based on this, combined with the magnitude of the torque of the P1 generator on the sun gear, it identifies whether the engine is actually burning. The specific control process is as follows: 1) When the engine cannot burn, in order to maintain the target speed control, the torque requested by the P1 generator MP1-Req will fluctuate within a small range to control and adjust the engine speed. Therefore, the combustion judgment in power-split mode is enabled when |MP1-Req| is less than a certain value MK1 in power-split mode. 2) The engine torque Mice is calculated in the engine control system mainly based on the actual intake air volume, the actual controlled fuel injection quantity under the fuel-to-air ratio control calibrated on the test bench, and the actual controlled ignition angle under the corresponding operating conditions. However, the system cannot monitor whether the injectors or ignition devices are actually injecting fuel or igniting. In target speed control, the engine output torque is adjusted by adjusting the engine intake air volume. If the engine injection system or ignition system malfunctions, the calculated engine torque Mice will be significantly different from the actual torque. When the engine cannot burn, the actual torque will be the engine running resistance torque. Engine torque on planetary gear set: 3) The motor control system can monitor the accuracy of the P1 generator torque in real time, and the accuracy of the P1 generator torque MP1-Act is usually stronger than the engine control torque, and the following performance is very good. MP1-Act basically follows MP1-Req. P1 generator torque on planetary gear set: 4) When the vehicle is in a constant-speed steady state, the net force acting on the ring gear is almost zero. If the vehicle is accelerating or decelerating, the ring gear exerts an inertial force on the planetary gear set. Due to the coupling between the ring gear and the wheel ends, the torque exerted by the ring gear on the planetary gear set can be calculated using the vehicle's acceleration torque. Torque acting on the planetary gear set by the ring gear: 5) Net torque acting on the planetary gear set: MP = MP - ice + MP - P1 + MP - Ring. Under normal circumstances, if the engine's calculated torque is accurate, MP is close to zero or within a certain torque range. If |MP| is greater than a certain value MK2 and remains so for a certain time T, then the engine is considered to be in an unburned state.

[0131] This embodiment can accurately judge the engine combustion in the power split mode of hybrid vehicles, avoid the catalytic converter corrosion and blockage, and improve the safety of the hybrid control system.

[0132] The above examples are only for understanding this application and do not constitute a limitation on the engine combustion judgment method of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0133] This application also provides an engine combustion determination device, as shown in Figure 6, the engine combustion determination device comprising:

[0134] The acquisition module 10 is used to acquire the engine operating torque, the target generator operating torque, and the gear ring operating torque when the requested torque of the target generator meets the combustion judgment enable condition corresponding to the power split mode.

[0135] Processing module 20 is used to determine the resultant torque of the planetary gear set based on the engine operating torque, the target generator operating torque, and the gear ring operating torque;

[0136] The judgment module 30 is used to judge the combustion state of the target engine based on the resultant torque of the planetary gear set and the resultant torque threshold, and to determine the combustion state of the target engine based on the state judgment result.

[0137] In one embodiment, the acquisition module 10 is further configured to:

[0138] The engine's calculated torque, the target generator's output torque, and the current acceleration are obtained; torque calculation is performed based on the engine's calculated torque to determine the engine's applied torque; torque calculation is performed based on the output torque to determine the target generator's applied torque; and torque calculation is performed based on the current acceleration to determine the gear ring's applied torque.

[0139] In one embodiment, the acquisition module 10 is further configured to:

[0140] Obtain the engine moment of inertia and engine speed change rate of the target engine; determine the engine inertia force of the target engine based on the engine moment of inertia and engine speed change rate; calculate the torque based on the engine inertia force and the calculated engine torque to determine the engine operating torque.

[0141] In one embodiment, the acquisition module 10 is further configured to:

[0142] The generator moment of inertia, the generator speed change rate, and the first transmission coefficient of the target generator are obtained; the generator inertia force of the target generator is determined based on the generator moment of inertia and the generator speed change rate; the torque is calculated based on the generator inertia force, the first transmission coefficient, and the output torque to determine the torque applied by the target generator.

[0143] In one embodiment, the acquisition module 10 is further configured to:

[0144] Obtain the vehicle's curb weight, tire radius, and second transmission coefficient; calculate the torque based on the vehicle's curb weight, tire radius, second transmission coefficient, and current acceleration to determine the torque applied by the gear ring.

[0145] In one embodiment, the determining module 30 is further configured to:

[0146] The combustion state of the target engine is determined based on the resultant torque of the planetary setter and the resultant torque threshold. When the absolute value of the resultant torque of the planetary setter is greater than the resultant torque threshold, the duration of the state is determined. When the duration of the state is greater than the duration threshold, the combustion state of the target engine is determined to be an unburned state.

[0147] In one embodiment, the determining module 30 is further configured to:

[0148] When the state judgment result is that the absolute value of the resultant torque of the planetary gear set is not greater than the resultant torque threshold, the combustion state of the target engine is determined to be normal combustion state.

[0149] In one embodiment, the acquisition module 10 is further configured to:

[0150] The current operating mode is determined based on the vehicle mode control information; when the current operating mode is power split mode, the requested torque of the target generator is obtained; when the absolute value of the requested torque of the target generator is less than the requested torque threshold, it is determined that the requested torque of the target generator meets the combustion judgment enable condition in the power split mode.

[0151] In one embodiment, the determining module 30 is further configured to:

[0152] When the target engine is in an unburned state, a combustion warning message is generated based on the resultant torque of the planetary gear set; the combustion warning message is sent to the vehicle display interface to provide a combustion status warning.

[0153] The engine combustion determination device provided in this application, employing the engine combustion determination method in the above embodiments, can solve the technical problem of engine combustion determination. Compared with the prior art, the beneficial effects of the engine combustion determination device provided in this application are the same as those of the engine combustion determination method provided in the above embodiments, and other technical features in the engine combustion determination device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0154] This application provides an engine combustion determination device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the engine combustion determination method in the above embodiment 1.

[0155] Referring to Figure 7 below, a schematic diagram of a suitable engine combustion determination device for implementing embodiments of this application is shown. The engine combustion determination device in embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. The engine combustion determination device shown in Figure 7 is merely an example and should not impose any limitations on the functionality and scope of use of embodiments of this application.

[0156] As shown in Figure 7, the engine combustion determination device may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the engine combustion determination device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. The communication device 1009 allows the engine combustion determination device to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows engine combustion determination devices with various systems, it should be understood that it is not required to implement or possess all of the systems shown. More or fewer systems may be implemented alternatively.

[0157] According to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0158] The engine combustion determination device provided in this application, employing the engine combustion determination method in the above embodiments, can solve the technical problem of engine combustion determination. Compared with the prior art, the beneficial effects of the engine combustion determination device provided in this application are the same as those of the engine combustion determination method provided in the above embodiments, and other technical features in this engine combustion determination device are the same as those disclosed in the method of the previous embodiment, and will not be repeated here.

[0159] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0160] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0161] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the engine combustion determination method in the above embodiments.

[0162] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0163] The aforementioned computer-readable storage medium may be included in the engine combustion detection device; or it may exist independently and not be assembled into the engine combustion detection device.

[0164] The aforementioned computer-readable storage medium carries one or more programs, which, when executed by the engine combustion determination device, cause the engine combustion determination device to: determine engine combustion.

[0165] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0166] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0167] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0168] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described engine combustion determination method, thereby solving the technical problem of engine combustion determination. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the engine combustion determination method provided in the above embodiments, and will not be repeated here.

[0169] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the engine combustion determination method described above.

[0170] The computer program product provided in this application can solve the technical problem of engine combustion judgment. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the engine combustion judgment method provided in the above embodiments, and will not be repeated here.

[0171] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. An engine combustion determination method in which, The engine combustion judgment method comprises: When the requested torque of the target generator meets the combustion judgment enabling condition corresponding to the power split mode, the engine acting torque, the target generator acting torque and the ring gear acting torque are obtained; The planetary row torque resultant force is determined according to the engine acting torque, the target generator acting torque and the ring gear acting torque; The combustion state of the target engine is judged according to the planetary row torque resultant force and the torque resultant force threshold, and the combustion state of the target engine is determined according to the state judgment result.

2. The method of claim 1, wherein, Before the engine acting torque, the target generator acting torque and the ring gear acting torque are obtained, the method further comprises: The engine calculation torque, the output torque of the target generator and the current acceleration are obtained; The engine acting torque is determined by torque calculation according to the engine calculation torque; The target generator acting torque is determined by torque calculation according to the output torque; The ring gear acting torque is determined by torque calculation according to the current acceleration.

3. The method of claim 2, wherein, The engine acting torque is determined by torque calculation according to the engine calculation torque, comprising: The engine moment of inertia and the engine speed change rate of the target engine are obtained; The engine inertia acting force of the target engine is determined according to the engine moment of inertia and the engine speed change rate; The engine acting torque is determined by torque calculation according to the engine inertia acting force and the engine calculation torque.

4. The method of claim 2, wherein, The target generator acting torque is determined by torque calculation according to the output torque, comprising: The generator moment of inertia of the target generator, the generator speed change rate of the target generator and the first transmission coefficient are obtained; The generator inertia acting force of the target generator is determined according to the generator moment of inertia and the generator speed change rate; The target generator acting torque is determined by torque calculation according to the generator inertia acting force, the first transmission coefficient and the output torque.

5. The method of claim 2, wherein, The ring gear acting torque is determined by torque calculation according to the current acceleration, comprising: The whole vehicle kerb mass, the vehicle tire radius and the second transmission coefficient are obtained; The ring gear acting torque is determined by torque calculation according to the whole vehicle kerb mass, the vehicle tire radius, the second transmission coefficient and the current acceleration.

6. The method of claim 1, wherein, The combustion state of the target engine is judged according to the planetary row torque resultant force and the torque resultant force threshold, and the combustion state of the target engine is determined according to the state judgment result, comprising: The combustion state of the target engine is judged according to the planetary row torque resultant force and the torque resultant force threshold; When the state judgment result is that the absolute value of the planetary row torque resultant force is greater than the torque resultant force threshold, the state duration is determined; When the state duration is greater than the duration threshold, the combustion state of the target engine is determined as the uncombusted state.

7. The method of claim 6, wherein, After the combustion state of the target engine is judged according to the planetary row torque resultant force and the torque resultant force threshold, the method further comprises: When the state judgment result is that the absolute value of the planetary row torque resultant force is not greater than the torque resultant force threshold value, it is determined that the combustion state of the target engine is a normal combustion state.

8. The method of any one of claims 1 to 7, wherein, Before the engine action torque, the target generator action torque, and the ring gear action torque are acquired when the request torque of the target generator meets the combustion judgment enabling condition corresponding to the power split mode, the method further includes: determining a current operating mode according to vehicle mode control information; when the current operating mode is the power split mode, acquiring the request torque of the target generator; when the absolute value of the request torque of the target generator is less than a request torque threshold value, it is determined that the request torque of the target generator meets the combustion judgment enabling condition in the power split mode.

9. The method of any one of claims 1 to 7, wherein, After the combustion state of the target engine is judged according to the planetary row torque resultant force and the torque resultant force threshold value, and the combustion state of the target engine is determined according to the state judgment result, the method further includes: when the combustion state of the target engine is an uncombusted state, generating combustion warning information according to the planetary row torque resultant force; sending the combustion warning information to a vehicle display interface for combustion state warning.

10. An engine combustion determination device, wherein, The engine combustion judgment device includes: an acquisition module configured to acquire the engine action torque, the target generator action torque, and the ring gear action torque when the request torque of the target generator meets the combustion judgment enabling condition corresponding to the power split mode; a processing module configured to determine the planetary row torque resultant force according to the engine action torque, the target generator action torque, and the ring gear action torque; a judgment module configured to judge the combustion state of the target engine according to the planetary row torque resultant force and the torque resultant force threshold value, and determine the combustion state of the target engine according to the state judgment result.

11. An engine combustion determination apparatus, wherein, The engine combustion judgment device includes a memory, a processor, and an engine combustion judgment program stored on the memory and executable on the processor, wherein the engine combustion judgment program is configured to implement the engine combustion judgment method according to any one of claims 1 to 9.

12. A storage medium, wherein, The storage medium stores an engine combustion judgment program, and the engine combustion judgment program is executed by the processor to implement the engine combustion judgment method according to any one of claims 1 to 9.

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