CN116816486A - Engine protection method, device, equipment and automobile - Google Patents

Abstract

When an engine cooling loop is in a full-open state of large circulation, if abnormal jump of the main water temperature of the engine is detected, stopping responding to the main water temperature of the engine, keeping the engine cooling loop in the full-open state of large circulation, taking the two-way water temperature of the engine as the main water temperature of the engine, and controlling a cooling system. Compared with the prior art, when the main water temperature jumps abnormally, the engine cooling loop is not switched back to the small circulation state, but is kept in the large circulation state, the effective heat dissipation of the engine can be ensured under the condition of abnormal main water temperature, and meanwhile, after the main water temperature of the engine is stopped, the two-way water temperature of the engine is temporarily used as the main water temperature of the engine to control the cooling system, so that when the main water temperature acquired by the water temperature sensor is unreliable, the engine can be provided with dynamic heat dissipation service which is adaptive to the working condition of the engine.

Description

Engine protection method, device, equipment and automobile

Technical Field

The application relates to the technical field of automobile engines, in particular to an engine protection method, an engine protection device, engine protection equipment and an automobile.

Background

In some vehicle models, the engine is provided with a thermal management module and only with one cylinder/head water temperature sensor, which is typically arranged on the cylinder of the engine, which water temperature sensor may be used as a main water temperature sensor of the engine for detecting the main water temperature of the engine, i.e. the average temperature of the engine.

The cooling system of the automobile engine is provided with a small circulation and a large circulation, wherein the small circulation is that cooling liquid circulates in a water channel in the engine, and the large circulation is that the cooling liquid circulates in the process of passing through a radiator outside the engine, namely a water tank. The switching between the two circulation modes is accomplished by a thermostat. When the thermostat is closed, a small cycle is performed, whereas a large cycle is performed.

In the warming-up process, the cooling liquid in the automobile water pump flows to the cylinder cover from the cylinder body along the cooling pipeline, flows to the water temperature sensor from the cylinder cover, flows through the thermostat through the cooling pipeline, enters the large circulation of the automobile engine cooling system, enters the radiator after the large circulation, and flows through the two water temperature sensors, wherein the two water temperature sensors are used for detecting the water temperature of the radiator end, and the water temperature of the part can be also called as the two water temperature.

In a large circulation state, an Electronic Control Module (ECM) of an automobile engine controls the opening of a heat management and control module (Temperature management module, TMM) based on a main water temperature detected by a water temperature sensor, if the water temperature sensor fails during driving, abnormal jump of the main water temperature acquired by the ECM is caused, for example, the main water temperature acquired by the ECM jumps from 100 ℃ to 60 ℃ in a short time, the TMM moves to a small circulation opening degree, the large circulation is closed, the heat generated by the engine is far greater than the heat dissipation capacity, the engine temperature is continuously increased, the cylinder gasket is damaged under serious conditions, and the engine is scrapped.

Disclosure of Invention

In view of the above, the embodiments of the present application provide an engine protection method, apparatus, device, and automobile, so as to ensure that an engine is not damaged due to excessive temperature when the main water temperature of the engine jumps abnormally.

In order to achieve the above object, the embodiment of the present application provides the following technical solutions:

an engine protection method comprising:

when the engine cooling loop is in a large-cycle full-open state, judging whether the main water temperature of the engine has abnormal jump;

when the main water temperature of the engine is in abnormal jump, the cooling loop of the engine is kept in a full-open state of large circulation, the response of the main water temperature of the engine is stopped, and the two-way water temperature of the engine is used as the main water temperature of the engine to control the cooling system.

Optionally, in the above engine protection method, the determining whether an abnormal jump occurs in the main water temperature of the engine includes:

acquiring the main water temperature of an engine at the current moment;

comparing the main water temperature of the engine at the current moment with the main water temperature of the engine at the last moment, and judging whether the difference value between the main water temperature of the engine at the current moment and the main water temperature of the engine at the last moment is larger than a preset temperature difference;

when the difference value between the main water temperature of the engine at the current moment and the main water temperature of the engine at the previous moment is larger than the preset temperature difference, judging whether the engine at the current moment is in a running state, when the engine is in the running state, indicating that the main water temperature of the engine has abnormal jump, and when the engine is not in the running state, indicating that the main water temperature of the engine has no abnormal jump.

Optionally, in the above engine protection method, after determining that the difference between the main water temperature of the engine at the current time and the main water temperature of the engine at the previous time is greater than a preset temperature difference, before determining whether the engine at the current time is in a running state, the method further includes:

starting timing;

when the difference value between the main water temperature of the engine and the main water temperature of the engine at the last moment is smaller than the preset temperature difference, the timing result is cleared;

judging whether the timing duration reaches a first preset duration, and continuously executing the subsequent steps when the timing duration reaches the preset duration. Optionally, in the above engine protection method, taking the two-way water temperature of the engine as the main water temperature of the engine includes:

acquiring the working condition of a cooling system;

acquiring a correction coefficient matched with the working condition of the cooling system;

correcting the two paths of water temperatures based on the correction coefficient;

and taking the corrected two-way water temperature as the main water temperature of the engine.

Optionally, in the above engine protection method, the obtaining the engine working condition at least includes:

and acquiring the opening degree of a cooling fan of the engine cooling system, the opening degree of a heat management and control module and the flow rate of cooling liquid in the cooling system.

Optionally, in the above engine protection method, taking the two-way water temperature of the engine as the main water temperature of the engine includes:

acquiring two paths of water temperatures of an engine;

based on the working condition of the cooling system and the mapping relation between the two-way water temperature and the main water temperature, acquiring the main water temperature matched with the two-way water temperature of the engine from a preset mapping table, and taking the matched main water temperature as the main water temperature of the engine.

Optionally, in the above engine protection method, the engine cooling circuit is kept in a full open state of large circulation, the engine is stopped responding to the main water temperature of the engine, and after the two-way water temperature of the engine is used as the main water temperature of the engine, the engine protection method further includes:

acquiring main water temperature and two-way water temperature of an engine;

judging whether the main water temperature is restored to a normal value or not based on the main water temperature and the two-way water temperature of the engine;

when the main water temperature is restored to a normal value, continuing to respond to the main water temperature of the engine, and stopping taking the two-way water temperature of the engine as the main water temperature of the engine;

and when the main water temperature is not recovered to the normal value, stopping responding to the main water temperature of the engine, and taking the two-way water temperature of the engine as the main water temperature of the engine.

Optionally, in the engine protection method, the controlling the cooling system based on the two-way water temperature includes:

and controlling the duty ratio of the cooling fan based on the two paths of water temperatures.

An engine protection device comprising: a main water temperature detection unit and a cooling system control unit;

the main water temperature detection unit is used for: when the engine cooling loop is in a large-cycle full-open state, judging whether the main water temperature of the engine has abnormal jump;

the cooling system control unit is used for: when the main water temperature of the engine is abnormally hopped, the engine cooling loop is kept in a full-open state of large circulation, the response of the main water temperature of the engine is stopped, and the two-way water temperature of the engine is used as the main water temperature of the engine.

An engine protection device includes a memory and a processor;

the memory stores a program adapted to be executed by the processor for executing the steps of any one of the engine protection methods described above.

An automobile comprising the engine protection device.

Based on the above technical scheme, when the engine cooling circuit is in the full-open state of large circulation, if abnormal jump of the main water temperature of the engine is detected, stopping responding to the main water temperature of the engine, keeping the engine cooling circuit in the full-open state of large circulation, taking the two-way water temperature of the engine as the main water temperature of the engine, and controlling the cooling system. Compared with the prior art, when the main water temperature jumps abnormally, the engine cooling loop is not switched back to the small circulation state, but is kept in the large circulation state, the effective heat dissipation of the engine can be ensured under the condition of abnormal main water temperature, and meanwhile, after the main water temperature of the engine is stopped, the two-way water temperature of the engine is temporarily used as the main water temperature of the engine to control the cooling system, so that when the main water temperature acquired by the water temperature sensor is unreliable, the engine can be provided with dynamic heat dissipation service which is adaptive to the working condition of the engine.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic flow chart of an engine protection method according to an embodiment of the present application;

FIG. 2 is a flow chart of an engine protection method according to another embodiment of the present application;

FIG. 3 is a schematic diagram of a flow chart for correcting a two-way water temperature in an engine protection method according to an embodiment of the present application;

FIG. 4 is a flow chart of a method for judging whether the main water temperature is recovered to be normal in the engine protection method according to the embodiment of the application;

FIG. 5 is a schematic view of an engine protection device according to an embodiment of the present disclosure;

fig. 6 is a schematic structural view of an engine protection device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

When the engine is started, during the warming-up process, the state of the cooling loop of the heat management and control module is sequentially changed into: when the water temperature sensor jumps abnormally, the water temperature detected by the water temperature sensor is distorted, if an Electronic Control Module (ECM) of the automobile engine controls the opening of the heat management and control module according to the distorted water temperature (lower water temperature), poor heat dissipation of the engine can be caused, and the engine is overheated and damaged.

Based on the above-mentioned scene, the application discloses an engine protection method when the main water temperature is abnormal and jumps, in the process of continuously running the engine, if the main water temperature reaches the closed-loop temperature (for example, 90 degrees) and lasts for a period of time (for example, 10 s), the main water temperature is detected, after the main water temperature is detected to be abnormal and jumps, the protection is started, and the engine cooling loop is controlled by the heat management and control module to enter a large-cycle full-open state, so that the engine is effectively radiated, and the problem that the engine is damaged due to overhigh temperature is prevented.

Specifically, referring to fig. 1, an embodiment of the present application discloses an engine protection method, which may include: steps S101-S103.

Step S101: acquiring the state of an engine cooling loop;

the scheme is mainly used for providing an engine protection method for an engine cooling system in a large-cycle full-open state, the engine continuously runs in the scene, along with the normal running of the engine from the start to the start, the main water temperature of the engine can gradually reach the closed-loop temperature (for example, 90 degrees) after the engine is started, at the moment, the engine cooling circuit can be switched from a small-cycle state and continuously kept in the large-cycle state, the large-cycle state and the small-cycle state of the cooling circuit of the engine are detected, and when the cooling circuit is detected to enter the large-cycle state, the detection logic for whether abnormal jump occurs to the main water temperature is triggered.

Step S102: judging whether the main water temperature of the engine has abnormal jump.

The abnormal jump means that the main water temperature is changed from a higher temperature value to a lower temperature value in a shorter time, and the difference between the two temperature values is larger.

When the cooling loop is in a large circulation state, the main water temperature is a stable value, even if fluctuation occurs, the fluctuation occurs in a smaller range, if abnormal jump of the main water temperature is detected, the collected main water temperature is unreliable, in the step, the main water temperature of the engine can be collected based on preset frequency or every unit time length, the main water temperature collected at the current moment is compared with the main water temperature collected at the previous moment, and whether the abnormal jump occurs in the main water temperature is judged according to a comparison result. Step S103: and keeping the engine cooling loop in a large-cycle full-open state, stopping responding to the main water temperature of the engine, taking the two-way water temperature of the engine as the main water temperature of the engine, and controlling the cooling system.

When detecting that the main water temperature is abnormal and jumps, if the temperature after jumping is lower than the closed-loop water temperature, the engine cooling circuit can be controlled to be switched back to a small-cycle state according to the prior scheme, at the moment, the engine cannot be effectively radiated, and the temperature of the engine can be continuously increased to further cause the damage of the engine. In order to prevent the engine from being damaged, in the scheme, when abnormal jump of the main water temperature is detected, the detected main water temperature is unreliable, so that in order to prevent the engine from being damaged due to overhigh temperature, the main water temperature of the engine can not be directly collected by the water temperature sensor, and the engine cooling loop is kept in a full-open state in a large cycle.

Of course, in the above scenario, the two-way water temperature may be used as input data of other systems, where the other systems are systems that need to collect the main water temperature of the engine.

As can be seen from the above-mentioned solutions, in the technical solutions disclosed in the embodiments, when the engine cooling circuit is in the full-open state of the large cycle, if an abnormal jump is detected in the main water temperature of the engine, at this time, the engine cooling circuit is kept in the full-open state of the large cycle by stopping responding to the main water temperature of the engine, and the two-way water temperature of the engine is used as the main water temperature of the engine to control the cooling system. Compared with the prior art, when the main water temperature jumps abnormally, the engine cooling loop is not switched back to the small circulation state, but is kept in the large circulation state, the effective heat dissipation of the engine can be ensured under the condition of abnormal main water temperature, and meanwhile, after the main water temperature of the engine is stopped, the two-way water temperature of the engine is temporarily used as the main water temperature of the engine to control the cooling system, so that when the main water temperature acquired by the water temperature sensor is unreliable, the engine can be provided with dynamic heat dissipation service which is adaptive to the working condition of the engine.

In the technical scheme disclosed by the embodiment, in the working process of the engine, the vehicle may be in a driving state, and at this time, in order to ensure safe driving of a user, a vehicle-mounted system is required to have a relatively fast reaction speed, so in the scheme, when judging whether abnormal jump occurs in the main water temperature of the engine, whether the abnormal jump occurs in the main water temperature of the engine can be judged by judging the temperature difference of the main water temperatures acquired by the front time node and the rear time node. Specifically, referring to fig. 2, in the foregoing embodiment, determining whether an abnormal jump occurs in the main water temperature of the engine may specifically include:

step S201: and acquiring the main water temperature of the engine at the current moment.

In this embodiment, the main water temperature of the engine uploaded by the water temperature sensor may be obtained based on a preset frequency and a preset time interval, and the frequency and the time interval may be set according to the user's needs.

Step S202: and comparing the main water temperature of the engine at the current moment with the main water temperature of the engine at the previous moment, judging whether the difference value of the main water temperature and the main water temperature is larger than the preset temperature difference, and when the difference value of the main water temperature and the main water temperature is smaller than the preset temperature difference, indicating that the main water temperature of the engine does not have abnormal jump.

In a specific embodiment of the present application, if the value of the main water temperature of the engine collected by the water temperature sensor at the previous time is a (a may be a value of 90 degrees or more), and the value of the main water temperature of the engine collected at the current time is B (B may be a value of 60 degrees or less), the difference between the temperature values of the main water temperatures collected by the water temperature sensors at the two adjacent times is greater than a preset temperature difference (for example, may be set to 10 degrees), which indicates that there is an abnormal jump in the main water temperature collected by the water temperature sensor, and if the difference between the temperature values of the main water temperatures collected by the water temperature sensors at the two adjacent times is less than a preset temperature difference, the fluctuation of the main water temperature collected by the water temperature sensor may be considered to be a normal fluctuation.

Further, in the technical solution disclosed in this embodiment, signal jump may occur due to some special reasons in the main water temperature collected by the water temperature sensor, but the jump process is short and does not last for a long time, after a short time, the main water temperature collected by the water temperature sensor may be restored to a normal value, at this time, an abnormal jump may not be considered to occur in the main water temperature of the engine, that is, in the above solution, after it is determined that the difference between the main water temperature of the engine at the current time and the main water temperature of the engine at the previous time is greater than the preset temperature difference, it may be further determined that the difference between the main water temperature of the engine at the current time and the main water temperature of the engine at the previous time is greater than the duration of the preset temperature difference, and when the duration of the phenomenon is greater than the first preset duration, it is indicated whether the abnormal jump occurs in the main water temperature of the engine, at this time, the following actions may be executed: and judging whether the engine is in a running state at the current moment. Specifically, the process may include: and when the difference between the main water temperature of the engine at the current moment and the main water temperature of the engine at the last moment is larger than the preset temperature difference, controlling a timer to start timing, if the difference between the main water temperature of the engine and the main water temperature of the engine at the last moment is smaller than the preset temperature difference in the timing process, clearing the timing result of the timing gas, continuously detecting the timing result of the timer, judging whether the timing duration of the timer reaches the first preset duration, and executing step S203 when the first preset duration is reached, wherein the first preset duration can be 5 seconds, 10 seconds or other values.

Step S203: judging whether the engine is in a running state at the current moment, when the engine is in the running state, indicating that the main water temperature of the engine is in abnormal jump, and when the engine is not in the running state, indicating that the main water temperature of the engine is not in abnormal jump.

In the technical scheme disclosed in the embodiment, when the difference between the temperature values of the main water temperatures acquired by the water temperature sensors at two adjacent moments is detected to be larger than a preset temperature difference or the duration of the action reaches a preset duration, the water temperature sensors are judged to have abnormal jump, when the water temperature sensors have abnormal jump, the running state of the engine can be further analyzed at the moment, the running state of the engine can have two kinds, one kind of running state is still kept in the running state, at the moment, the engine can continuously release heat because the engine still remains in the running state, at the moment, the abnormal jump can be considered to be the abnormal jump needing to be responded, the method disclosed in the subsequent embodiment of the application needs to be continuously executed, the other running state of the engine is the engine stop, namely the engine is not in the running state, at the moment, the engine is not running, the engine is not continuously operated, the engine can not continuously release heat, the temperature of the engine can not be further increased, and the engine can be gradually self-cooled, at the moment, the abnormal jump is considered to be the abnormal jump not to be responded, and the main water temperature of the engine can be defaulted to have the abnormal temperature, the abnormal jump does not appear at the running state, the abnormal jump does not need to respond, the logic is not appear, the subsequent jump is executed, the method is executed, and the method is simple to execute the analysis, and the method is simple in the analysis process is easy, and the process is easy to execute.

In the technical solution disclosed in this embodiment, when the two-way water temperature of the engine is taken as the main water temperature of the engine to control the cooling system of the engine, the two-way water temperature is not the main water temperature, and the two-way water temperature is different from the main water temperature to a certain extent, and the two-way water temperature is smaller than the main water temperature, so that when the two-way water temperature of the engine is taken as the main water temperature of the engine to be used, the two-way water temperature can be corrected first, and the corrected two-way water temperature is taken as the main water temperature, so that the two-way water temperature can be more accurately represented. Specifically, referring to fig. 3, in the method, the two-way water temperature of the engine is taken as the main water temperature of the engine, which comprises the following steps:

step S301: and obtaining the working condition of the cooling system.

In this step, considering that the temperature difference between the main water temperature and the secondary water temperature is related to the working condition of the cooling system, the target parameters may be specifically related to some target parameters in the working condition of the cooling system, where the target parameters refer to parameters related to the temperature difference between the main water temperature and the secondary water temperature, for example, parameters such as the opening degree of a cooling fan, the opening degree of a heat management and control module, and the flow rate of cooling liquid in the cooling system.

Step S302: and obtaining a correction coefficient matched with the working condition of the cooling system.

In this step, after the working condition of the cooling system is obtained, the target parameter in the working condition of the cooling system is extracted, the correction coefficient corresponding to the target parameter is determined based on the target parameter, the correction coefficient is preconfigured, and has a pre-established corresponding relation with the target parameter, and when the target parameter is determined, the corresponding correction coefficient can be determined based on the corresponding relation.

Step S303: and correcting the two-way water temperature based on the correction coefficient.

In the step, after the correction coefficient is determined, the two-way water temperature is corrected based on the correction coefficient, the corrected two-way water temperature is higher than the two-way water temperature before correction, and the corrected two-way water temperature is closer to the real temperature of the main water temperature.

Step S304: and taking the corrected two-way water temperature as the main water temperature of the engine.

In this step, the corrected two-way water temperature is used as the main water temperature of the engine, and at this time, since the corrected two-way water temperature is closer to the main water temperature of the engine, a more adaptive heat dissipation effect can be provided to the engine when the cooling system is controlled based on the corrected two-way water temperature.

In this embodiment, when the two-way water temperature is corrected, the main water temperature corresponding to the two-way water temperature may also be determined by directly looking up a table. At this time, the two-way water temperature of the engine is set as the main water temperature of the engine, and the method comprises the following steps: the method comprises the steps that two paths of water temperatures of an engine are obtained, the main water temperature matched with the two paths of water temperatures of the engine is directly obtained from a preset mapping table based on the working condition of the cooling system and the mapping relation between the two paths of water temperatures and the main water temperature, the preset mapping table is a mapping table which is built in advance and stores the mapping relation between the two paths of water temperatures and the main water temperature of the engine under the working condition of each cooling system, namely, when the working condition of the cooling system is met, the main water temperature matched with the two paths of water temperature detected currently can be found based on the preset mapping table, and compared with the mode that the two paths of water temperature is corrected by adopting a correction coefficient in the previous embodiment, the method does not need a correction step, and the main water temperature matched with the two paths of water temperature is directly obtained through table lookup, so that the system has higher response speed.

In this embodiment, when the main water temperature of the engine is stopped, and the two-way water temperature of the engine is taken as the main water temperature of the engine, after the cooling system is controlled and kept for a second preset time period (for example, 1 minute, 2 minutes or other time periods), the main water temperature detected by the water temperature sensor can be continuously detected, when the value of the detected main water temperature is recovered to be normal, the main water temperature of the engine is continuously responded, and the two-way water temperature of the engine is stopped to be taken as the main water temperature of the engine, if the second preset time period is continued, the main water temperature detected by the water temperature sensor is still determined not to be recovered to be in a normal state, and then the engine cooling circuit is kept in a full-cycle open state in the following engine starting period. Specifically, referring to fig. 4, in the above method, the engine cooling circuit is kept in a full-open state of large circulation, the response to the main water temperature of the engine is stopped, and after the two-way water temperature of the engine is used as the main water temperature of the engine, the cooling system is controlled, the method further includes steps S401-S404.

Step S401: and obtaining the two paths of water temperature and the main water temperature of the engine.

The second water temperature sensor is used for detecting the water temperature of the radiator end, the water temperature of the part can also be called as the second water temperature, if the water temperature sensor is normal, after the cooling loop enters the full open state of the large circulation, as the water temperature of the radiator end is detected by the second water temperature sensor, the water temperature value of the second water temperature of the engine is smaller than the main water temperature detected by the water temperature sensor, and in the embodiment, whether the main water temperature is recovered to the normal state can be judged through the comparison result of the second water temperature of the engine and the main water temperature.

In this embodiment, if the engine is stopped to respond to the main water temperature of the engine, and the two-way water temperature of the engine is used as the main water temperature of the engine, the analysis method disclosed in this embodiment is immediately executed after the cooling system is controlled, at this time, the accidental factor in the foregoing may not be immediately eliminated, which may cause the subsequent determination result to be unreliable.

Step S402: judging whether the main water temperature is restored to a normal value or not based on the main water temperature and the two-way water temperature of the engine;

in this step, the obtained main water temperature may be compared with the two-way water temperature, and it is determined whether the detected main water temperature of the water temperature sensor is greater than the two-way water temperature of the engine, if the main water temperature is smaller than the two-way water temperature, it is indicated that the main water temperature is not recovered to a normal value, and if the main water temperature is greater than the two-way water temperature, it is necessary to further determine the difference between the two water temperatures, because a certain temperature difference (the temperature difference may be set to 10 degrees) exists between the main water temperature and the two-way water temperature in a normal state, and only when the main water temperature is greater than the two-way water temperature and the difference between the two water temperatures is greater than the temperature difference, it may be considered that the main water temperature is recovered to be normal.

Step S403: and when the main water temperature is restored to a normal value, continuing to respond to the main water temperature of the engine, and stopping taking the two-way water temperature of the engine as the main water temperature of the engine.

In this step, when the main water temperature is restored to a normal value, it is indicated that the main water temperature detected by the water temperature sensor has been restored to normal, at which time, it is necessary to continue responding to the main water temperature of the engine and stop taking the two-way water temperature of the engine as the main water temperature of the engine.

Step S404: and when the main water temperature is not recovered to the normal value, stopping responding to the main water temperature of the engine, and taking the two-way water temperature of the engine as the main water temperature of the engine.

In this step, when the main water temperature is not yet restored to the normal value, it may be determined that the abnormality of the water temperature sensor is an abnormality that cannot be automatically restored, and it is necessary to continue stopping responding to the main water temperature of the engine, and continue to use the two-way water temperature of the engine as the main water temperature of the engine, and then execute step S401 and subsequent steps at intervals in the engine working cycle until continuing responding to the main water temperature of the engine and stopping using the two-way water temperature of the engine as the main water temperature of the engine, or until stopping the engine or powering down the key off the whole vehicle. Of course, if the vehicle is a hybrid vehicle, the present solution is only executed in the engine running state.

In this embodiment, an engine protection device is disclosed, and specific working contents of each unit in the device are referred to the contents of the above method embodiment.

The engine protection device provided by the embodiment of the application is described below, and the engine protection device described below and the engine protection method described above can be referred to correspondingly.

Referring to fig. 5, the apparatus may include a main water temperature detection unit 10 and a cooling system control unit 20;

corresponding to steps S101 to S102 in the above method, the main water temperature detecting unit 10 determines whether an abnormal jump occurs in the main water temperature of the engine when the engine cooling circuit is in a full-open state of large cycle;

corresponding to step S103 in the above method, the cooling system control unit 20 keeps the engine cooling circuit in a full-open state of large circulation when an abnormal jump occurs in the main water temperature of the engine, stops responding to the main water temperature of the engine, and takes the two-way water temperature of the engine as the main water temperature of the engine.

The main water temperature detection unit 10 and the cooling system control unit 20 disclosed in the present embodiment are also used to perform the respective steps in the above-described engine protection method embodiment, and are not described here in detail.

Fig. 6 is a hardware structure diagram of an engine protection device according to an embodiment of the present application, where the engine protection device may be loaded in a driving computer or other vehicle-mounted systems of an automobile, and referring to fig. 6, the engine protection device may include: at least one processor 100, at least one communication interface 200, at least one memory 300, and at least one communication bus 400;

in the embodiment of the present application, the number of the processor 100, the communication interface 200, the memory 300 and the communication bus 400 is at least one, and the processor 100, the communication interface 200 and the memory 300 complete the communication with each other through the communication bus 400; it will be apparent that the communication connection schematic shown in the processor 100, the communication interface 200, the memory 300 and the communication bus 400 shown in fig. 6 is only optional;

alternatively, the communication interface 200 may be an interface of a communication module, such as an interface of a GSM module;

the processor 100 may be a central processing unit CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement embodiments of the present application.

Memory 300 may comprise high-speed RAM memory or may further comprise non-volatile memory (non-volatile memory), such as at least one disk memory.

The processor 100 is specifically configured to: each step of any one of the engine protection methods described above is performed.

For example, the processor 100 may be configured to: when the engine cooling loop is in a large-cycle full-open state, judging whether the main water temperature of the engine has abnormal jump;

when the main water temperature of the engine is in abnormal jump, the cooling loop of the engine is kept in a full-open state of large circulation, the response of the main water temperature of the engine is stopped, and the two-way water temperature of the engine is used as the main water temperature of the engine to control the cooling system.

Corresponding to the above embodiment, the present application also discloses an automobile, which refers to an automobile to which an engine is applied, for example, a gasoline automobile or a hybrid automobile, etc., to which the above engine protection device can be applied.

For convenience of description, the above system is described as being functionally divided into various modules, respectively. Of course, the functions of each module may be implemented in the same piece or pieces of software and/or hardware when implementing the present application.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An engine protection method, comprising:

when the engine cooling loop is in a large-cycle full-open state, judging whether the main water temperature of the engine has abnormal jump;

when the main water temperature of the engine is in abnormal jump, the cooling loop of the engine is kept in a full-open state of large circulation, the response of the main water temperature of the engine is stopped, and the two-way water temperature of the engine is used as the main water temperature of the engine to control the cooling system.

2. The engine protection method according to claim 1, wherein the determining whether an abnormal jump occurs in the main water temperature of the engine comprises:

acquiring the main water temperature of an engine at the current moment;

comparing the main water temperature of the engine at the current moment with the main water temperature of the engine at the last moment, and judging whether the difference value between the main water temperature of the engine at the current moment and the main water temperature of the engine at the last moment is larger than a preset temperature difference;

when the difference value between the main water temperature of the engine at the current moment and the main water temperature of the engine at the previous moment is larger than the preset temperature difference, judging whether the engine at the current moment is in a running state, when the engine is in the running state, indicating that the main water temperature of the engine has abnormal jump, and when the engine is not in the running state, indicating that the main water temperature of the engine has no abnormal jump.

3. The engine protection method according to claim 1, wherein, after determining that the difference between the main water temperature of the engine at the present time and the main water temperature of the engine at the previous time is greater than a preset temperature difference, determining whether the engine is in an operating state at the present time is preceded by:

starting timing;

when detecting that the difference value between the main water temperature of the engine and the main water temperature of the engine at the previous moment is smaller than the preset temperature difference, resetting the timing result;

judging whether the timing duration reaches a first preset duration, and continuously executing the subsequent steps when the timing duration reaches the preset duration.

4. The engine protection method according to claim 1, characterized in that taking the two-way water temperature of the engine as the main water temperature of the engine comprises:

acquiring the working condition of a cooling system;

acquiring a correction coefficient matched with the working condition of the cooling system;

correcting the two paths of water temperatures based on the correction coefficient;

and taking the corrected two-way water temperature as the main water temperature of the engine.

5. The engine protection method of claim 1, wherein obtaining engine operating conditions comprises at least:

and acquiring the opening degree of a cooling fan of the engine cooling system, the opening degree of a heat management and control module and the flow rate of cooling liquid in the cooling system.

6. The engine protection method according to claim 1, characterized in that taking the two-way water temperature of the engine as the main water temperature of the engine comprises:

acquiring two paths of water temperatures of an engine;

based on the working condition of the cooling system and the mapping relation between the two-way water temperature and the main water temperature, acquiring the main water temperature matched with the two-way water temperature of the engine from a preset mapping table, and taking the matched main water temperature as the main water temperature of the engine.

7. The engine protection method according to claim 1, wherein the engine cooling circuit is maintained in a full-open state of a large cycle, the response to the main water temperature of the engine is stopped, and the two-way water temperature of the engine is used as the main water temperature of the engine, and after the cooling system is controlled, the engine protection method further comprises:

acquiring main water temperature and two-way water temperature of an engine;

judging whether the main water temperature is restored to a normal value or not based on the main water temperature and the two-way water temperature of the engine;

when the main water temperature is restored to a normal value, continuing to respond to the main water temperature of the engine, and stopping taking the two-way water temperature of the engine as the main water temperature of the engine;

and when the main water temperature is not recovered to the normal value, stopping responding to the main water temperature of the engine, and taking the two-way water temperature of the engine as the main water temperature of the engine.

8. The engine protection method of claim 1, wherein controlling the cooling system based on the two-way water temperature comprises:

and controlling the duty ratio of the cooling fan based on the two paths of water temperatures.

9. An engine protection device, comprising: a main water temperature detection unit and a cooling system control unit;

the main water temperature detection unit is used for: when the engine cooling loop is in a large-cycle full-open state, judging whether the main water temperature of the engine has abnormal jump;

the cooling system control unit is used for: when the main water temperature of the engine is abnormally hopped, the engine cooling loop is kept in a full-open state of large circulation, the response of the main water temperature of the engine is stopped, and the two-way water temperature of the engine is used as the main water temperature of the engine.

10. An automobile comprising the engine protection device according to claim 9.