CN115773184B - Electromechanical equipment and engine override method and override device thereof - Google Patents

Abstract

The invention discloses an electromechanical device, an engine override method and an override device thereof, wherein the override method comprises the following steps: acquiring a target override instruction, wherein the target override instruction is any one of at least two stages of override instructions; determining a target override strategy according to the target override instruction, wherein the target override strategy comprises: a primary override strategy and a secondary override strategy; the primary override strategy is provided with a shutdown limit value, the secondary override strategy is not provided with the shutdown limit value, and the torque limit degree of the primary override strategy is higher than that of the secondary override strategy; and controlling the engine to run according to the target override strategy, and sending out warning information according to the target override strategy. According to the invention, through setting the hierarchical override strategy, overrides with different degrees are executed under different emergency conditions, the running requirement of the engine on fault under the emergency conditions is met, meanwhile, the damage to the engine is reduced to the greatest extent, and the safety performance of the engine is improved.

Description

Electromechanical equipment and engine override method and override device thereof

Technical Field

The present invention relates to the technical field of engine control, and in particular to an electromechanical device and an engine override method and an override device thereof.

Background Art

In ship engines or some electromechanical equipment, the engine is set with an override function. In an emergency, the override strategy is activated to override some engine self-protection strategies and force the electromechanical equipment to continue running, thereby preventing safety accidents caused by engine failure, such as flameout or torque limitation.

In the existing override strategy, after the override function is activated, the engine operation is not subject to any torque limit or parking restriction, which has the following problems: the existing override strategy cannot optimize the engine torque limit and parking, causing great damage to the engine. After the override function is activated, the engine runs for a long time, which may cause serious faults such as engine cylinder seizure, affecting the safety and service life of the engine and equipment.

Summary of the invention

The present invention provides an electromechanical device and an engine override method and an override device thereof. By grading the override strategies, different degrees of override are performed in different emergency situations, thereby solving the problem that after the existing override strategy is activated, the engine is not subject to torque limit and parking limit, causing great damage to the engine, and improving the engine safety performance.

According to one aspect of the present invention, there is provided an engine override method, comprising:

Obtaining a target override instruction, wherein the target override instruction is any one of at least two levels of override instructions;

Determining a target override strategy according to the target override instruction, the target override strategy includes: a primary override strategy and a secondary override strategy; wherein the primary override strategy sets a shutdown limit, the secondary override strategy does not set a shutdown limit, and the torque limit degree of the primary override strategy is higher than the torque limit degree of the secondary override strategy;

The engine operation is controlled according to the target override strategy, and a warning message is issued according to the target override strategy.

Optionally, the first-level override strategy includes at least one of the following: obtaining a first excess air coefficient, and performing smoke limit on the engine based on the first excess air coefficient, the first excess air coefficient being smaller than the excess air coefficient during normal operation of the engine; obtaining a first overheating protection parameter, and performing overheating protection on the engine based on the first overheating protection parameter, the first overheating protection parameter being larger than the overheating protection parameter during normal operation of the engine; obtaining a first-level override time, and performing override timeout protection based on the first-level override time.

Optionally, the secondary override strategy includes at least one of the following: obtaining a second excess air coefficient, and limiting the engine's smoke density based on the second excess air coefficient, the second excess air coefficient being smaller than the excess air coefficient of the primary override strategy; shielding the engine's overheating protection function; shielding the engine's override timeout protection function.

Optionally, the first-level override strategy also includes: obtaining a first-level non-override fault type; obtaining a current fault type of the engine; determining whether the current fault type belongs to the first-level non-override fault type; if the current fault type belongs to the first-level non-override fault type, exiting or shielding the first-level override strategy.

Optionally, the secondary override strategy also includes: obtaining a secondary non-override fault type, the secondary non-override fault type at least partially overlaps with the primary non-override fault type, and the number of the secondary non-override fault types is less than the number of the primary non-override fault types; obtaining a current fault type of the engine; determining whether the current fault type belongs to the secondary non-override fault type; if the current fault type belongs to the secondary non-override fault type, exiting or shielding the secondary override strategy.

Optionally, the obtaining of the target override instruction includes: setting at least two levels of override switches, the at least two levels of override switches including a primary override switch and a secondary override switch; obtaining a first trigger state of the primary override switch and a second trigger state of the secondary override switch; and determining the target override instruction according to the first trigger state and the second trigger state.

Optionally, obtaining the target override instruction includes: obtaining an override strategy trigger instruction; obtaining the whole machine operating parameters and the engine operating parameters of the electromechanical equipment driven by the engine; determining the current fault danger level based on the whole machine operating parameters and the engine operating parameters; and determining the target override instruction based on the current fault danger level.

Optionally, the override method further includes: recording override execution parameters of override strategies at each level, wherein the override execution parameters include at least one of the following: number of overrides, override start and end time, and type of engine fault when the override is triggered; and generating a fault report based on the override execution parameters.

According to another aspect of the present invention, an engine override device is provided for executing the above-mentioned engine override method, the device comprising: an instruction acquisition unit, for acquiring a target override instruction, the target override instruction being any one of at least two levels of override instructions; a decision unit, for determining a target override strategy according to the target override instruction, the target override strategy comprising: a first-level override strategy and a second-level override strategy; wherein the first-level override strategy sets a shutdown limit, the second-level override strategy does not set a shutdown limit, and the torque limit level of the first-level override strategy is lower than the torque limit level of the second-level override strategy; an execution unit, for controlling the engine operation according to the target override strategy, and issuing a warning message according to the target override strategy.

According to another aspect of the present invention, there is provided an electromechanical device, comprising: an engine and the above-mentioned engine override device, wherein the engine override device is used to execute the above-mentioned engine override method.

The technical solution of the embodiment of the present invention is to set at least two levels of override instructions, obtain a target override instruction, determine a target override strategy according to the target override instruction, the target override strategy includes: a level one override strategy and a level two override strategy, wherein the level one override strategy sets a shutdown limit, the level two override strategy does not set a shutdown limit, and the torque limit degree of the level one override strategy is higher than the torque limit degree of the level two override strategy; control the engine operation according to the target override strategy, and issue a warning message according to the target override strategy, and implement different levels of override strategies under different working conditions by grading the override strategies, thereby solving the problem that the engine is not subject to torque limit and parking limit after the existing override strategy is activated, causing great damage to the engine, meeting the engine failure operation requirements in emergency situations, while minimizing damage to the engine, which is beneficial to improving engine safety performance.

It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a flow chart of an engine override method provided by the present invention;

FIG2 is a flow chart of an engine override method under a first-level override strategy provided by the present invention;

FIG3 is a flow chart of an engine override method under a two-level override strategy provided by the present invention;

FIG4 is a flow chart of another engine override method provided by the present invention;

FIG5 is a flow chart of another engine override method provided by the present invention;

FIG6 is a flow chart of another engine override method provided by the present invention;

FIG7 is a schematic structural diagram of an engine override device provided by the present invention;

FIG. 8 is a schematic structural diagram of another engine override device provided by the present invention.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

Figure 1 is a flow chart of an engine override method provided by the present invention. This embodiment can be applied to application scenarios in which override strategies are managed in a graded manner based on the degree of danger of the engine and the entire machine operation. The method can be executed by an engine override device, which can be implemented in the form of hardware and/or software.

Among them, override means: bypassing a certain procedure or a certain safety protection function in the control process, forcing the electromechanical equipment to continue to operate in a short period of time, so as to ensure the special measures of temporarily ensuring the normal operation of the equipment in certain emergency situations when a fault occurs.

As shown in FIG1 , the engine override method specifically includes the following steps:

Step S1: Obtain a target override instruction, where the target override instruction is any one of at least two levels of override instructions.

The target override instruction refers to the final instruction used to control the engine to execute the override strategy.

In an embodiment of the present invention, at least two levels of override instructions may be set, for example, a level one override instruction and a level two override instruction, and the danger level of the engine and the whole machine under the level one override instruction is lower than the danger level of the engine and the whole machine under the level two override instruction. It should be noted that the danger level refers to the probability of personal and property safety damage. The greater the probability of personal and property safety damage, the higher the danger level, and the higher the level of the corresponding override instruction.

In some embodiments, an override instruction may be issued by setting an override switch, and the user may trigger any override switch according to the actual degree of danger, and issue a corresponding target override instruction.

In other embodiments, the danger level of the current operating condition can be determined in combination with the override switch and the operating condition parameters, and a target override instruction corresponding to the danger level can be issued. Specifically, after the override switch is triggered, if the danger level under the current operating condition is low, the first-level override instruction is determined as the target override instruction; if the danger level under the current operating condition is high, the second-level override instruction is determined as the target override instruction.

Step S2: Determine the target override strategy according to the target override instruction.

There is a one-to-one correspondence between the override strategy and the override instruction. When the target override instruction is obtained, the override strategy corresponding to the target override instruction level is determined as the target override strategy.

In an embodiment of the present invention, the higher the danger level of the engine and the whole machine operation, the greater the scope of the target override strategy execution, that is, the higher the danger level, the more programs or safety protection functions are bypassed during the control process.

In some embodiments, the target override strategy includes: a level one override strategy and a level two override strategy, the level one override strategy having a smaller degree of override than the level two override strategy; wherein the level one override strategy sets a shutdown limit, the level two override strategy does not set a shutdown limit, and the level one override strategy has a higher degree of torque limit than the level two override strategy.

Exemplarily, if the target override instruction is a level one override instruction, the level one override strategy is determined as the target override strategy, with a lower degree of override, protecting the engine as much as possible while ensuring engine operation; if the target override instruction is a level two override instruction, the level two override strategy is determined as the target override strategy, with a higher degree of override, without considering engine risks, ensuring engine operation to the greatest extent.

Step S3: Controlling the engine operation according to the target override strategy, and issuing a warning message according to the target override strategy.

In some embodiments, the target override strategy is a primary override strategy, and the engine operation is controlled according to the target override strategy, including: limiting the torque and stopping the engine according to the torque limit and the stop limit, wherein the torque limit refers to limiting the output torque of the engine.

In some embodiments, the target override strategy is a secondary override strategy, and the engine operation is controlled according to the target override strategy, including: not limiting the torque and shutdown of the engine.

In some embodiments, the warning information includes: sound and light warning information. For example, when the target override strategy is a level one override strategy, the indicator light can be controlled to flash; when the target override strategy is a level two override strategy, the indicator light can be controlled to stay on.

Specifically, a multi-level override strategy is set, and the corresponding relationship between the override strategy and the override instruction is set. When the engine or the electromechanical equipment driven by the engine is in a dangerous state, the override function is triggered. If the current danger level is low, the first-level override instruction is used as the target override instruction, and the first-level override strategy corresponding to the first-level override instruction is determined as the target override instruction. Under the first-level override strategy, part of the torque limit is contacted, and the engine is torque-limited and shut down according to the torque limit and the shutdown limit, and a corresponding warning message is issued to remind the user that the current device is running in the first-level override mode; if the current danger level is high, the second-level override instruction is used as the target override instruction, and the second-level override strategy corresponding to the second-level override instruction is determined as the target override instruction. Under the second-level override strategy, the shutdown limit and most of the torque limit are contacted, and a corresponding warning message is issued to remind the user that the current device is running in the second-level override mode.

Therefore, the technical solution of the present invention, through hierarchical management of the override strategy, executes override strategies of different degrees under different working conditions, thereby solving the problem that the engine is not subject to torque limit and parking restriction after the existing override strategy is activated, causing great damage to the engine. It meets the engine failure operation requirements in emergency situations, while minimizing the damage to the engine, which is beneficial to improving the engine safety performance.

In some embodiments, the first-level override strategy sets an engine protection strategy. Typically, the engine protection strategy includes: a smoke limitation strategy, an overheat protection strategy, and an override timeout protection strategy.

Among them, smoke limitation refers to limiting the output torque of the engine when the excess air coefficient (that is, the ratio between the actual intake volume of the engine and the theoretical intake volume) is too low, so as to ensure combustion economy and prevent the engine from smoking due to insufficient intake.

Overheat protection means that when the coolant temperature, oil temperature, and intake temperature are too high, the corresponding torque limit is executed to prevent the coolant temperature, oil temperature, and intake temperature from being too high, causing engine damage or excessive emissions.

Override timeout protection means that after the engine has run in override mode for a period of time, the engine will stop executing the override strategy by issuing an alarm or forcibly exiting the override mode, so as to prevent damage to the engine due to long-term operation in override mode.

Optionally, FIG2 is a flow chart of an engine override method under a first-level override strategy provided by the present invention.

As shown in FIG2 , under the first-level override strategy, the engine override method includes the following steps:

Step S201: Obtain a first excess air coefficient, and perform smoke limit on the engine based on the first excess air coefficient, wherein the first excess air coefficient is smaller than a conventional excess air coefficient during normal operation of the engine.

Step S202: obtaining a first overheat protection parameter, and performing overheat protection on the engine based on the first overheat protection parameter, wherein the first overheat protection parameter is greater than a conventional overheat protection parameter during normal operation of the engine.

Step S203: Obtain the first-level override time, and perform override timeout protection based on the first-level override time.

For example, if the normal excess air coefficient during normal engine operation is defined as 1.2 and the normal overheat protection parameter is 50°C, the first excess air coefficient can be set to any value greater than or equal to 1 and less than or equal to 1.1, and the first overheat protection parameter can be set to 80°C.

Specifically, when executing the first-level override strategy, the first excess air coefficient is used to limit the smoke density of the engine. If the excess air coefficient is lower than the first excess air coefficient, the fuel injection amount is limited according to the actual intake volume to achieve engine torque limitation; if the excess air coefficient is greater than the first excess air coefficient, the engine is controlled to operate normally. The first overheat protection parameter is used to protect the engine from overheating. If any one of the coolant temperature, oil temperature or intake temperature exceeds the first excess air coefficient, the fuel injection amount is limited to achieve engine torque limitation; if the excess air coefficient is greater than the first excess air coefficient, the engine is controlled to operate normally. After entering the first-level override strategy, the execution time of the first-level override strategy is timed to determine whether the execution time reaches the first-level override time. If the execution time reaches the first-level override time, an override timeout alarm is issued to remind the user to terminate the first-level override strategy. By setting the first-level override strategy, some torque limits are lifted to protect the engine as much as possible while ensuring the normal operation of the engine.

Optionally, FIG3 is a flow chart of an engine override method under a two-level override strategy provided by the present invention.

As shown in FIG3 , under the secondary override strategy, the engine override method includes the following steps:

Step S301: Obtain a second excess air coefficient, and perform smoke limit on the engine based on the second excess air coefficient, wherein the second excess air coefficient is smaller than the first excess air coefficient.

Step S302: Shielding the overheat protection function of the engine.

Step S303: Shielding the over-control timeout protection function of the engine.

For example, if the first excess air coefficient is defined as any value greater than or equal to 1 and less than or equal to 1.1, the second excess air coefficient can be set to any value greater than or equal to 0.8 and less than or equal to 0.9.

Specifically, when executing the secondary override strategy, the second excess air coefficient is used to limit the smoke density of the engine. If the excess air coefficient is lower than the second excess air coefficient, the injection amount is limited according to the actual intake volume to achieve engine torque limit; if the excess air coefficient is greater than the second excess air coefficient, the engine is controlled to run normally, and at the same time, the engine's overheat protection function and override timeout protection function are shielded. By setting the secondary override strategy, most torque restrictions are lifted, and the shutdown limit is eliminated, maintaining engine operation to the greatest extent.

It should be noted that the first excess air coefficient, the second excess air coefficient, the first overheat protection parameter and the first level override time can be established through calibration, and there is no restriction on their specific values.

Therefore, by setting up override hierarchical management, users are recommended to use the first-level override strategy with a low degree of override, so as to protect the engine's safety performance as much as possible and reduce engine damage while ensuring engine fault operation; in cases with a higher degree of danger, the second-level override strategy is used to maintain engine operation to the greatest extent, solving the problem of the engine being unrestricted in torque and parking restrictions after the existing override strategy is activated, causing great damage to the engine. It meets the needs of engine fault operation in emergency situations, while minimizing damage to the engine, which is beneficial to improving engine safety performance.

Optionally, FIG4 is a flow chart of another engine override method provided by the present invention, which adds a first-level non-override identification strategy based on FIG1 .

As shown in FIG4 , under the first-level override strategy, the engine override method further includes:

Step S401: Obtain the level 1 non-override fault type.

Among them, the non-override fault type refers to the fault type that will affect the normal operation of the engine when a certain program or a certain safety protection function is bypassed.

Optionally, the first-level non-override fault types include but are not limited to: fault types that use alternative values after the fault occurs, such as using alternative values after a water temperature sensor fault or using alternative values after a rail pressure valve fault; fault types that impose greater restrictions on the engine after the fault occurs, such as an insufficient intake pressure fault.

Step S402: Obtain the current fault type of the engine.

Step S403: Determine whether the current fault type belongs to a level 1 non-overrideable fault type.

If the current fault type belongs to the first level non-override fault type, execute step S404; otherwise, execute step S405.

Step S404: exit or shield the restriction of the first-level override strategy on the current fault type.

Step S405: bypass the safety protection procedure of the current fault type.

Specifically, under the first-level override strategy, if the current fault type of the engine belongs to the first-level non-override fault type, then under the override strategy, the fault strategy is triggered normally and the safety protection program corresponding to the current fault type cannot be bypassed; if the current fault type of the engine does not belong to the first-level non-override fault type, the safety protection program corresponding to the current fault type can be bypassed.

Optionally, FIG5 is a flow chart of another engine override method provided by the present invention, which adds a secondary non-override identification strategy based on FIG1 .

As shown in FIG5 , under the secondary override strategy, the engine override method further includes:

Step S501: Obtain the level 2 non-override fault type.

Among them, the second-level non-override fault type and the first-level non-override fault type at least partially overlap, and the number of the second-level non-override fault types is less than the number of the first-level non-override fault types.

Optionally, the first-level non-override fault types include, but are not limited to: fault types that use alternative values after a fault occurs, such as using alternative values after a water temperature sensor fault or using alternative values after a rail pressure valve fault.

Step S502: Obtain the current fault type of the engine.

Step S503: Determine whether the current fault type belongs to the second-level non-override fault type.

If the current fault type belongs to the second-level non-override fault type, execute step S504; otherwise, execute step S505.

Step S504: exit or shield the restriction of the second-level override strategy on the current fault type.

Step S505: Skip the safety protection procedure for the current fault type.

Specifically, under the second-level override strategy, if the current fault type of the engine belongs to the second-level non-override fault type, then under the override strategy, the fault strategy is triggered normally and the safety protection program corresponding to the current fault type cannot be overridden; if the current fault type of the engine does not belong to the second-level non-override fault type, the safety protection program corresponding to the current fault type can be overridden.

It should be noted that the first level non-override fault type and the second level non-override fault type can be established through calibration, and there is no restriction on their specific types.

In some embodiments, obtaining a target override instruction includes: setting at least two levels of override switches, the at least two levels of override switches including a primary override switch and a secondary override switch; obtaining a first trigger state of the primary override switch and a second trigger state of the secondary override switch; and determining the target override instruction based on the first trigger state and the second trigger state.

Specifically, if the user presses the first-level override switch, the first-level override instruction is determined as the target override instruction, and the first-level override strategy is executed; if the user presses the second-level override switch, or the user presses the first-level override switch and the second-level override switch at the same time, the second-level override instruction is determined as the target override instruction, and the second-level override strategy is executed. The hierarchical override management is realized through the hardware structure, and the circuit structure is simple and easy to operate.

In other embodiments, obtaining a target override instruction includes: obtaining an override strategy trigger instruction; obtaining whole machine operating parameters and engine operating parameters of an engine-driven electromechanical device; determining a current fault risk level based on the whole machine operating parameters and the engine operating parameters; and determining a target override instruction based on the current fault risk level.

Specifically, the user can issue an override strategy trigger instruction through a button or other type of switch. After the override strategy trigger instruction is issued, the whole machine operating parameters of the electromechanical equipment driven by the engine and the engine operating parameters are collected in real time, and the current fault danger level is identified according to the whole machine operating parameters and the engine operating parameters. If the danger level is low, the first-level override instruction is determined as the target override instruction and the first-level override strategy is executed; if the danger level is high, the second-level override instruction is determined as the target override instruction and the second-level override strategy is executed. By combining software and hardware, the current danger level is automatically identified and different override strategies are executed. The degree of intelligence and automation is high, avoiding the erroneous execution of the override strategy caused by inaccurate human identification.

Optionally, FIG6 is a flow chart of another engine override method provided by the present invention, which adds an override recording function based on FIG1 .

As shown in FIG6 , the engine override method further includes the following steps:

Step S4: Record the override execution parameters of each level of override strategies.

The override execution parameters include at least one of the following: the number of overrides, the start and end time of the override, and the type of engine fault when the override is triggered.

Step S5: Generate a fault report according to the override execution parameter.

Exemplarily, the number of overrides of the first-level override strategy within a specific time, the start and end time of the override of the last three first-level override strategies, and the type of engine fault when the first-level override strategy is triggered are recorded, and the execution parameters of the recorded first-level override strategy are stored in a preset log format, and the fault type that is easy to trigger the first-level override strategy is determined based on the recording results, and a fault report is generated; the number of overrides of the second-level override strategy, the start and end time of the override of the last three second-level override strategies, and the type of engine fault when the second-level override strategy is triggered are recorded, and the execution parameters of the recorded second-level override strategy are stored in a preset log format, and the fault type that is easy to trigger the second-level override strategy is determined based on the recording results, and a fault report is generated. By adding the override record and fault analysis functions, real-time fault troubleshooting is facilitated and the difficulty of after-sales operations is simplified.

Based on the same inventive concept, the present invention also provides an engine override device for executing the engine override method provided by any of the above embodiments, and has functional modules and beneficial effects corresponding to the execution method.

FIG. 7 is a schematic diagram of the structure of an engine override device provided by the present invention.

As shown in Figure 7, the engine override device 00 includes: an instruction acquisition unit 101, used to acquire a target override instruction, the target override instruction is any one of at least two levels of override instructions; a decision unit 102, used to determine a target override strategy according to the target override instruction, the target override strategy includes: a first-level override strategy and a second-level override strategy; wherein, the first-level override strategy sets a shutdown limit, the second-level override strategy does not set a shutdown limit, and the torque limit level of the first-level override strategy is lower than the torque limit level of the second-level override strategy; an execution unit 103, used to control the engine operation according to the target override strategy, and to issue a warning message according to the target override strategy.

FIG8 is a schematic structural diagram of another engine override device provided by the present invention, which exemplarily shows a specific implementation of an instruction acquisition unit based on FIG7 .

As shown in FIG8 , the instruction acquisition unit 101 may include a primary override switch K1 , a secondary override switch K2 , and a logic circuit 101A. The logic circuit 101A outputs a target override instruction according to the triggering states of the primary override switch K1 and the secondary override switch K2 .

In some embodiments, the execution unit 103 is used to obtain a first excess air coefficient, and perform smoke limit on the engine based on the first excess air coefficient, the first excess air coefficient being smaller than the excess air coefficient during normal operation of the engine; obtain a first overheat protection parameter, and perform overheat protection on the engine based on the first overheat protection parameter, the first overheat protection parameter being larger than the overheat protection parameter during normal operation of the engine; obtain a first-level override time, and perform override timeout protection based on the first-level override time.

In some embodiments, the execution unit 103 is used to obtain a second excess air coefficient and to limit the engine smoke based on the second excess air coefficient, wherein the second excess air coefficient is smaller than the excess air coefficient of the first-level override strategy; shield the engine's overheating protection function; and shield the engine's override timeout protection function.

In some embodiments, the execution unit 103 is also used to obtain a first-level non-override fault type; obtain a current fault type of the engine; determine whether the current fault type belongs to a first-level non-override fault type; if the current fault type belongs to a first-level non-override fault type, exit or block the first-level override strategy.

In some embodiments, the execution unit 103 is also used to obtain a second-level non-override fault type, the second-level non-override fault type at least partially overlaps with the first-level non-override fault type, and the number of second-level non-override fault types is less than the number of first-level non-override fault types; obtain the current fault type of the engine; determine whether the current fault type belongs to the second-level non-override fault type; if the current fault type belongs to the second-level non-override fault type, exit or block the second-level override strategy.

In some embodiments, the instruction acquisition unit 101 also includes a danger level analysis subunit, which is used to obtain an override strategy trigger instruction; obtain the whole machine operating parameters and engine operating parameters of the engine-driven electromechanical equipment; determine the current fault danger level based on the whole machine operating parameters and the engine operating parameters; and determine the target override instruction based on the current fault danger level.

In some embodiments, the engine override device 00 also includes: a storage unit for recording override execution parameters of override strategies at each level, wherein the override execution parameters include at least one of the following: number of overrides, override start and end time, and engine fault type when the override is triggered; and generating a fault report based on the override execution parameters.

Based on any of the above embodiments, the present invention further provides an electromechanical device, comprising: an engine and the above engine override device, wherein the engine override device is used to execute the above engine override method.

The technical solution of the embodiment of the present invention is to set at least two levels of override instructions, obtain a target override instruction, determine a target override strategy according to the target override instruction, the target override strategy includes: a level one override strategy and a level two override strategy, wherein the level one override strategy sets a shutdown limit, the level two override strategy does not set a shutdown limit, and the torque limit level of the level one override strategy is lower than the torque limit level of the level two override strategy; control the engine operation according to the target override strategy, and issue a warning message according to the target override strategy, and implement different degrees of override strategies under different working conditions by grading the override strategies, thereby solving the problem that the engine is not subject to torque limit and parking limit after the existing override strategy is activated, causing great damage to the engine, and meeting the engine failure operation requirements in emergency situations, while minimizing damage to the engine, which is beneficial to improving engine safety performance.

It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. An engine override method, comprising:

acquiring a target override instruction, wherein the target override instruction is any one of at least two stages of override instructions;

determining a target override strategy according to the target override instruction, wherein the target override strategy comprises: a primary override strategy and a secondary override strategy;

the primary override strategy is provided with a shutdown limit value, the secondary override strategy is not provided with the shutdown limit value, and the torque limit degree of the primary override strategy is higher than that of the secondary override strategy;

controlling the engine to run according to the target override strategy, and sending out warning information according to the target override strategy;

the primary override strategy comprises the following steps: acquiring a first-level uncontrollable fault type;

acquiring the current fault type of the engine;

judging whether the current fault type belongs to the primary uncontrollable fault type or not;

if the current fault type belongs to the first-level non-override fault type, exiting or shielding the first-level override strategy;

The secondary override strategy includes:

Obtaining a second-level non-overrideable fault type, wherein the second-level non-overrideable fault type at least partially coincides with the first-level non-overrideable fault type, and the number of the second-level non-overrideable fault types is smaller than that of the first-level non-overrideable fault types;

acquiring the current fault type of the engine;

Judging whether the current fault type belongs to the secondary uncontrollable fault type or not;

And if the current fault type belongs to the secondary uncontrollable fault type, exiting or shielding the secondary override strategy.

2. The method of claim 1, wherein the primary override strategy comprises at least one of:

Acquiring a first excess air coefficient, and limiting the smoke intensity of the engine based on the first excess air coefficient, wherein the first excess air coefficient is smaller than the excess air coefficient when the engine normally operates;

Acquiring a first overheat protection parameter, and overheat protecting the engine based on the first overheat protection parameter, wherein the first overheat protection parameter is larger than the overheat protection parameter when the engine normally operates;

And acquiring the first-level override time, and executing override timeout protection based on the first-level override time.

3. The method of claim 1, wherein the secondary override strategy comprises at least one of:

Acquiring a second excess air coefficient, and limiting the smoke intensity of the engine based on the second excess air coefficient, wherein the second excess air coefficient is smaller than the excess air coefficient of the primary override strategy;

Shielding an overheat protection function of the engine;

and shielding the override timeout protection function of the engine.

4. A method according to any one of claims 1-3, wherein the obtaining a target override instruction comprises:

Setting at least two stages of override switches, wherein the at least two stages of override switches comprise a first-stage override switch and a second-stage override switch;

acquiring a first trigger state of the primary override switch and a second trigger state of the secondary override switch;

And determining the target override instruction according to the first trigger state and the second trigger state.

5. A method according to any one of claims 1-3, wherein the obtaining a target override instruction comprises:

acquiring an override strategy triggering instruction;

Acquiring the overall operation parameters and the engine operation parameters of the electromechanical equipment driven by the engine;

Determining a current fault risk level according to the overall machine operation parameters and the engine operation parameters;

and determining the target override instruction according to the current fault risk level.

6. A method according to any one of claims 1-3, further comprising:

And recording the override execution parameters of each level of override strategy, wherein the override execution parameters comprise at least one of the following: the number of override times, the start and end time of override, and the fault type of the engine when the override is triggered;

And generating a fault report according to the override execution parameters.

7. An engine override apparatus for performing the engine override method of any one of claims 1-6, the apparatus comprising:

The instruction acquisition unit is used for acquiring a target override instruction, wherein the target override instruction is any one of at least two stages of override instructions;

the decision unit is used for determining a target override strategy according to the target override instruction, and the target override strategy comprises the following steps: a primary override strategy and a secondary override strategy;

The primary override strategy is provided with a shutdown limit value, the secondary override strategy is not provided with a shutdown limit value, and the torque limit level of the primary override strategy is lower than that of the secondary override strategy;

and the execution unit is used for controlling the engine to run according to the target override strategy and sending out warning information according to the target override strategy.

8. An electromechanical device, comprising: an engine and an engine override device as claimed in claim 7 for performing the engine override method as claimed in any one of claims 1 to 6.