CN113266477B - Engine downtime checking method and device - Google Patents

Abstract

The engine shutdown time verification method and device provided by the present invention are applied in the field of automobile technology. After the method obtains the engine shutdown time, target historical parameters, target current parameters and the first shutdown time threshold, if the engine shutdown time is less than the first shutdown time time threshold, then judge whether the target historical parameter meets the first verification condition, if the target historical parameter meets the first verification condition and the target current parameter meets the second verification condition, then it is determined that the engine shutdown time is not credible, the present invention provides The engine stop time verification method can verify the engine stop time, judge the reliability of the engine stop time, and help improve the safety of the vehicle.

Description

Method and device for calibrating engine shutdown time

technical field

The invention belongs to the technical field of automobiles, and in particular relates to a method and device for checking engine downtime.

Background technique

In the case that the vehicle power supply battery is not disconnected from the engine controller, the engine controller can record the time interval from the last power-off to the current power-on of the engine after T15 power-off, which is the engine shutdown time.

In practical applications, the engine shutdown time is generally used to estimate the attenuation degree of engine-related parameters, so that there is a reasonable initial value for precise control of the engine and other systems after the next power-on. For example, the oxygen sensor dew point detection function needs to judge the temperature around the oxygen sensor after power-on according to the engine shutdown time, and confirm the relevant calculation of the dew point success status judgment logic based on this temperature. If the user directly disconnects the power supply battery from the engine controller after the vehicle is in use, the engine shutdown time will not be counted normally, causing the dew point detection function to use the wrong engine shutdown time after the next driving cycle is powered on. The surrounding moisture is heated before it is completely evaporated, causing the oxygen sensor to burn out.

In view of the important role of the engine downtime in the vehicle control process, how to verify the engine downtime to ensure the credibility of the engine downtime has become one of the technical problems to be solved urgently by those skilled in the art.

Contents of the invention

In view of this, the object of the present invention is to provide a method and device for checking the engine downtime, which can verify the engine downtime, ensure the credibility of the engine downtime, and help improve the safety of vehicle operation. The specific scheme is as follows :

In a first aspect, the present invention provides a method for checking engine downtime, including:

Acquiring the engine shutdown time, the target historical parameter representing the vehicle driving process in the last driving cycle, the target current parameter representing the engine running state in the current driving cycle, and the first shutdown time threshold;

If the engine downtime is less than the first downtime threshold, judging whether the target historical parameter satisfies a first verification condition;

If the target historical parameter satisfies the first verification condition, judging whether the target current parameter satisfies the second verification condition;

If the target current parameter satisfies the second verification condition, it is determined that the engine shutdown time is not credible.

Optionally, the target historical parameters include: engine running time, mileage and coolant temperature of the last driving cycle;

The judging whether the target historical parameter satisfies the first verification condition includes:

If at least one of the engine running time is greater than the running time threshold, the driving mileage is greater than the mileage threshold, and the coolant temperature of the last driving cycle is greater than the first coolant temperature threshold is satisfied, it is determined that the target historical parameter satisfies the first threshold. a verification condition;

If the engine running time is not greater than the running time threshold, the driving mileage is not greater than the mileage threshold and the coolant temperature of the last driving cycle is not greater than the first coolant temperature, determine the target history The parameter does not meet the first verification condition.

Optionally, the target current parameters include: coolant temperature, engine oil temperature and pre-turbine exhaust gas temperature of the current driving cycle;

The judging whether the current parameter of the target satisfies the second verification condition includes:

If at least one of the coolant temperature of the current driving cycle is less than the second coolant temperature threshold, the engine oil temperature is less than the engine oil temperature threshold, and the pre-turbine exhaust temperature is less than the exhaust temperature threshold is satisfied, it is determined that the target current The parameter meets the second verification condition;

If the coolant temperature of the current driving cycle is not less than the second coolant temperature threshold, the engine oil temperature is not less than the engine oil temperature threshold, and the pre-turbine exhaust gas temperature is not less than the exhaust temperature threshold, determine The target current parameter does not satisfy the second verification condition.

Optionally, the process of obtaining the first downtime threshold includes:

Obtain the coolant temperature of the previous driving cycle and the coolant temperature of the current driving cycle;

calculating the difference between the coolant temperature of the last driving cycle and the coolant temperature of the current driving cycle to obtain a target coolant temperature difference;

determining a first shutdown time threshold corresponding to the target coolant temperature difference according to a first preset mapping relationship;

Wherein, the correspondence relationship between the coolant temperature difference and the first shutdown time threshold is recorded in the first preset mapping relationship.

Optionally, if the engine shutdown time is not credible, or the engine shutdown time is greater than or equal to the first shutdown time threshold, or the target current parameter does not meet the second verification condition, the dew point detection is successful Status flag reset;

Correct the initial energy threshold for dew point detection to obtain the target energy threshold;

Dew point detection is performed according to the target energy threshold.

Optionally, said modifying the initial energy threshold of dew point detection to obtain the target energy threshold includes:

obtaining a second downtime threshold;

wherein the second downtime threshold is greater than the first downtime threshold;

If the engine shutdown time is greater than or equal to the second shutdown time threshold, the initial energy threshold is used as the target energy threshold;

If the engine downtime is less than the second downtime threshold, a correction factor is determined according to the engine downtime;

The initial energy threshold for dew point detection is corrected according to the correction coefficient to obtain a target energy threshold.

Optionally, the acquiring the second downtime threshold includes:

Obtain the coolant temperature of the last driving cycle and the current ambient temperature;

calculating the difference between the coolant temperature of the last driving cycle and the current ambient temperature to obtain a target heat dissipation temperature difference;

Determine a second downtime threshold corresponding to the target heat dissipation temperature difference according to a second preset mapping relationship;

Wherein, the second preset mapping relationship records the corresponding relationship between the heat dissipation temperature difference and the second shutdown time threshold.

In a second aspect, the present invention provides a device for checking engine downtime, comprising:

An acquisition unit, configured to acquire the engine shutdown time, the target historical parameter representing the vehicle running process in the last driving cycle, the target current parameter representing the engine operating state in the current driving cycle, and the first shutdown time threshold;

A first judging unit, configured to judge whether the target historical parameter satisfies a first verification condition if the engine downtime is less than the first downtime threshold;

A second judging unit, configured to judge whether the target current parameter satisfies a second verification condition if the target historical parameter satisfies the first verification condition;

A judging unit, configured to judge that the engine shutdown time is not credible if the target current parameter satisfies the second verification condition.

Optionally, the target historical parameters include: engine running time, mileage and coolant temperature of the last driving cycle;

When the first judging unit is used to judge whether the target historical parameter satisfies the first verification condition, it specifically includes:

If at least one of the engine running time is greater than the running time threshold, the driving mileage is greater than the mileage threshold, and the coolant temperature of the last driving cycle is greater than the first coolant temperature threshold is satisfied, it is determined that the target historical parameter satisfies the first threshold. a verification condition;

If the engine running time is not greater than the running time threshold, the driving mileage is not greater than the mileage threshold and the coolant temperature of the last driving cycle is not greater than the first coolant temperature, determine the target history The parameter does not meet the first verification condition.

Optionally, the target current parameters include: coolant temperature, engine oil temperature and pre-turbine exhaust gas temperature of the current driving cycle;

When the second judging unit is used to judge whether the target current parameter satisfies the second verification condition, it specifically includes:

If at least one of the coolant temperature of the current driving cycle is less than the second coolant temperature threshold, the engine oil temperature is less than the engine oil temperature threshold, and the pre-turbine exhaust temperature is less than the exhaust temperature threshold is satisfied, it is determined that the target current The parameter meets the second verification condition;

If the coolant temperature of the current driving cycle is not less than the second coolant temperature threshold, the engine oil temperature is not less than the engine oil temperature threshold, and the pre-turbine exhaust gas temperature is not less than the exhaust temperature threshold, determine The target current parameter does not satisfy the second verification condition.

Based on the above technical solution, the engine downtime verification method provided by the present invention, after obtaining the engine downtime, target historical parameters, target current parameters and the first downtime threshold, if the engine downtime is less than the first downtime threshold, then judge Whether the target historical parameter satisfies the first verification condition, if the target historical parameter meets the first verification condition and the target current parameter satisfies the second verification condition, then it is determined that the engine shutdown time is not credible, and the engine shutdown time calibration provided by the present invention The test method can verify the engine downtime, judge the reliability of the engine downtime, and help improve the safety of the vehicle.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a flow chart of a method for verifying engine downtime provided by an embodiment of the present invention;

Fig. 2 is a flow chart of another engine downtime verification method provided by an embodiment of the present invention;

Fig. 3 is a structural block diagram of an engine shutdown time verification device provided by an embodiment of the present invention;

Fig. 4 is a structural block diagram of another device for verifying engine shutdown time provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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 It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

During the actual use of the vehicle, if the engine running time or running mileage in the last driving cycle exceeds a certain threshold, the engine coolant temperature, engine oil temperature, exhaust temperature, etc. will all rise. After the engine stops, the temperature will increase with time. Prolonging and slowly attenuating, it will eventually attenuate to the vicinity of the ambient temperature, and the ambient temperature has a very critical impact on the attenuation speed. Therefore, the judgment threshold of various parameters can be set based on the ambient temperature, which is also achieved by various embodiments of the present invention. one of the foundations.

Based on the above content, please refer to Fig. 1. Fig. 1 is a flow chart of a method for verifying engine downtime provided by an embodiment of the present invention. This method can be applied to electronic equipment. Other controllers on the car that can collect relevant data and execute the control program corresponding to the verification method provided by the present invention; with reference to Fig. 1, the flow process of the engine downtime verification method provided by the embodiment of the present invention may include:

S100. Acquire the engine shutdown time, the target historical parameter representing the driving process of the vehicle in the last driving cycle, the target current parameter representing the engine running state in the current driving cycle, and a first shutdown time threshold.

It is conceivable that the engine downtime mentioned in the embodiments of the present invention and subsequent embodiments refers to the engine downtime collected after the engine controller is powered on in the current driving cycle.

Optionally, the target historical parameters characterizing the driving process of the vehicle in the last driving cycle include at least the engine running time, the driving mileage and the coolant temperature of the last driving cycle, and of course, other historical parameters, such as the temperature of the last driving cycle oil temperature etc. It should be noted that the target historical parameters all refer to the parameters stored at the moment of engine shutdown in the previous driving cycle, and the specific storage rules and storage timing can be realized by referring to the existing technology, and will not be repeated here.

The target current parameters that characterize the engine operating state in the current driving cycle include at least: the coolant temperature, the engine oil temperature, and the exhaust gas temperature before the swirl in the current driving cycle. Of course, similar to the target historical parameters, the target current parameters can also include other content. Under the premise of not exceeding the scope of the core idea of the present invention, it also belongs to the scope of protection of the present invention.

Optionally, in this embodiment of the present invention, the first shutdown time threshold is determined based on a change in coolant temperature. First, obtain the coolant temperature of the previous driving cycle and the coolant temperature of the current driving cycle, and calculate the difference between the coolant temperature of the previous driving cycle and the coolant temperature of the current driving cycle to obtain the target coolant temperature difference, Then, according to the first preset mapping relationship, determine the first downtime threshold corresponding to the target coolant temperature difference, wherein the first preset mapping relationship provided by the embodiment of the present invention records the difference between the coolant temperature difference and the first Correspondence between downtime thresholds.

S110. Determine whether the engine downtime is less than the first downtime threshold, and if so, execute S120.

After obtaining the above parameters, first judge whether the engine downtime is less than the first downtime threshold, if the engine downtime is less than the first downtime threshold, then it is necessary to further judge the credibility of the engine downtime, and execute S120, On the contrary, if the engine shutdown time is greater than or equal to the first shutdown application threshold, it indicates that the engine shutdown time is credible.

S120. Determine whether the target historical parameter satisfies the first verification condition, and if so, execute S130.

Optionally, in the case of specific parameters included in the aforementioned target historical parameters, if the engine running time is greater than the running time threshold, the driving mileage is greater than the mileage threshold, and the coolant temperature of the last driving cycle is greater than at least the first coolant temperature threshold If one is satisfied, then it is determined that the target historical parameter satisfies the first check condition, and continue to execute S130. On the contrary, if the engine running time is not greater than the running time threshold, the driving mileage is not greater than the mileage threshold and the coolant temperature of the last driving cycle is not greater than the first - coolant temperature, it is determined that the target historical parameter does not meet the first verification condition, and the current verification process is exited.

It should be noted that the above-mentioned operating time threshold, mileage threshold and first coolant temperature threshold are all set based on the ambient temperature. The specific setting process can be determined by calibration on the basis of a large amount of historical data and test data. After obtaining the current ambient temperature, the corresponding judgment threshold is determined by querying the corresponding mapping relationship.

S130. Determine whether the current parameter of the target satisfies the second verification condition, and if so, execute S140.

In the case that the target historical parameter satisfies the first verification condition, it is further judged whether the target current parameter satisfies the second verification condition.

In the case where the target current parameter includes the aforementioned parameters, if at least one of the coolant temperature of the current driving cycle is less than the second coolant temperature threshold, the engine oil temperature is less than the engine oil temperature threshold, and the pre-turbine exhaust temperature is less than the exhaust temperature threshold is satisfied, Then it is determined that the current parameter of the target satisfies the second verification condition; on the contrary, if the coolant temperature of the current driving cycle is not less than the second coolant temperature threshold, the engine oil temperature is not less than the engine oil temperature threshold, and the exhaust temperature before the vortex is not less than the exhaust temperature threshold, it is determined that the current parameter of the target does not meet the second verification condition.

Similar to the aforementioned content, the second coolant temperature threshold, engine oil temperature threshold, and exhaust gas temperature threshold in this step are also actually set based on the ambient temperature. For the specific determination process, refer to the relevant content in S120, which will not be repeated here. Expand.

S140. It is determined that the engine shutdown time is not credible.

After the judgment of the above steps, if the engine shutdown time is less than the first shutdown time threshold, the target historical parameter meets the first verification condition, and the target current parameter satisfies the second verification condition, then determine the engine shutdown time obtained by the current driving cycle It is not credible and cannot be adopted.

In summary, the verification method provided by the embodiment of the present invention can verify the engine downtime, judge the credibility of the engine downtime, and help improve the safety of the vehicle.

As mentioned above, the engine shutdown time can be used to estimate the degree of attenuation of relevant engine parameters, and can also be used for dew point detection by the oxygen sensor. Optionally, see Figure 2. On the basis of the embodiment shown in Figure 1, Figure 2 The illustrated embodiment can also detect the dew point of the oxygen sensor based on the verification process of the engine shutdown time. On the basis of the corresponding flow in Fig. 1, the flow of the method also includes:

S150. When the engine shutdown time is unreliable, or the engine shutdown time is greater than or equal to the first shutdown time threshold, or the target current parameter does not meet the second verification condition, reset the dew point detection success status flag, and correct the dew point detection The initial energy threshold of , to get the target energy threshold.

When the engine downtime is greater than or equal to the first downtime threshold and the target current parameter does not satisfy the second verification condition, the initial energy threshold for dew point detection needs to be corrected based on the engine downtime. In order to further subdivide the correction process, the embodiment of the present invention provides a second downtime threshold, and the second downtime threshold is greater than or equal to the first downtime threshold in the preceding steps. If the engine shutdown time is greater than or equal to the second shutdown time threshold, it means that the engine shutdown time obtained by the current driving cycle is credible, and there is no need to adjust the initial energy threshold, and the initial energy threshold can be used as the target energy threshold; on the contrary, if the engine If the shutdown time is less than the second shutdown time threshold (greater than or equal to the first shutdown time threshold), the correction coefficient is further determined according to the engine shutdown time, and the initial energy threshold for dew point detection is corrected according to the obtained correction coefficient to obtain the target energy threshold.

It should be noted that the correction coefficient is positively correlated with the engine shutdown time, the longer the engine shutdown time, the larger the correction coefficient, and correspondingly, the larger the target energy threshold. As for the specific corresponding relationship between the correction coefficient and the engine shutdown time, it can be determined based on the actual engine running state and test data, which is not limited in the present invention.

Optionally, the selection of the second downtime threshold may be determined based on the coolant temperature and the ambient temperature. Specifically, first obtain the coolant temperature of the previous driving cycle and the current ambient temperature, calculate the difference between the coolant temperature of the previous driving cycle and the current ambient temperature, obtain the target heat dissipation temperature difference, and then according to the second preset mapping relationship , determining a second downtime threshold corresponding to the target heat dissipation temperature difference, wherein a correspondence between the heat dissipation temperature difference and the second downtime threshold is recorded in the second preset mapping relationship.

S160. Perform dew point detection according to the target energy threshold.

After the target energy threshold is determined, dew point detection can be performed according to the target energy threshold. The specific detection process can be implemented based on existing technologies, and will not be described in detail here.

To sum up, the verification method provided by the embodiment of the present invention can also correct the energy threshold of dew point detection on the basis of verifying the engine shutdown time, so as to ensure that the oxygen sensor has enough time to heat up and eliminate oxygen Water droplets around the sensor can avoid damage to the oxygen sensor during dew point detection and improve the safety of dew point detection.

The following is an introduction to the engine downtime verification device provided by the embodiment of the present invention. The engine downtime verification device described below can be considered as the method for verifying the engine downtime provided by the embodiment of the present invention, which needs to be set in the central equipment Functional module architecture; the following description can be cross-referenced with the above.

Fig. 3 is a structural block diagram of an engine shutdown time verification device provided by an embodiment of the present invention. Referring to Fig. 3, the device may include:

The acquiring unit 10 is used to acquire the engine shutdown time, the target historical parameter representing the vehicle running process in the last driving cycle, the target current parameter representing the engine running state in the current driving cycle, and the first shutdown time threshold;

The first judging unit 20 is used for judging whether the target historical parameter satisfies the first verification condition if the engine downtime is less than the first downtime threshold;

The second judging unit 30 is configured to judge whether the target current parameter satisfies the second verification condition if the target historical parameter satisfies the first verification condition;

The judging unit 40 is configured to judge that the engine shutdown time is not credible if the target current parameter satisfies the second verification condition.

Optionally, the target historical parameters include: engine running time, driving mileage and coolant temperature of the last driving cycle;

When the first judging unit 20 is used to judge whether the target historical parameter satisfies the first verification condition, it specifically includes:

If at least one of the engine running time is greater than the running time threshold, the driving mileage is greater than the mileage threshold and the coolant temperature of the last driving cycle is greater than the first coolant temperature threshold is satisfied, it is determined that the target historical parameter meets the first verification condition;

If the engine running time is not greater than the running time threshold, the driving mileage is not greater than the mileage threshold and the coolant temperature of the last driving cycle is not greater than the first coolant temperature, it is determined that the target historical parameter does not meet the first verification condition.

Optionally, the target current parameters include: coolant temperature, engine oil temperature and exhaust gas temperature before the vortex in the current driving cycle;

When the second judging unit 30 is used to judge whether the current parameter of the target satisfies the second verification condition, it specifically includes:

If at least one of the coolant temperature of the current driving cycle is less than the second coolant temperature threshold, the engine oil temperature is less than the engine oil temperature threshold, and the exhaust temperature before the vortex is less than the exhaust temperature threshold is satisfied, it is determined that the target current parameter meets the second verification condition;

If the coolant temperature of the current driving cycle is not less than the second coolant temperature threshold, the engine oil temperature is not less than the engine oil temperature threshold, and the pre-turbine exhaust temperature is not less than the exhaust temperature threshold, it is determined that the target current parameter does not meet the second verification condition.

Optionally, the obtaining unit 10 is configured to obtain the first downtime threshold, specifically including:

Obtain the coolant temperature of the previous driving cycle and the coolant temperature of the current driving cycle;

Calculate the difference between the coolant temperature of the previous driving cycle and the coolant temperature of the current driving cycle to obtain the target coolant temperature difference;

Determine a first shutdown time threshold corresponding to the target coolant temperature difference according to a first preset mapping relationship;

Wherein, the corresponding relationship between the coolant temperature difference and the first shutdown time threshold is recorded in the first preset mapping relationship.

Optionally, refer to FIG. 4. FIG. 4 is a structural block diagram of another engine shutdown time verification device provided by an embodiment of the present invention. On the basis of the embodiment shown in FIG. 3, it also includes:

The reset unit 50 is used to reset the dew point detection success status flag if the engine shutdown time is not credible, or the engine shutdown time is greater than or equal to the first shutdown time threshold, or the target current parameter does not meet the second verification condition;

A correction unit 60, configured to correct an initial energy threshold for dew point detection to obtain a target energy threshold;

The detection unit 70 is configured to perform dew point detection according to the target energy threshold.

Optionally, the correction unit 60 is configured to correct the initial energy threshold for dew point detection to obtain the target energy threshold, specifically including:

obtaining a second downtime threshold;

Wherein, the second downtime threshold is greater than the first downtime threshold;

If the engine shutdown time is greater than or equal to the second shutdown time threshold, the initial energy threshold is used as the target energy threshold;

If the engine downtime is less than the second downtime threshold, a correction factor is determined according to the engine downtime;

The initial energy threshold of dew point detection is corrected according to the correction coefficient to obtain the target energy threshold.

Optionally, the correction unit 60 is configured to obtain the second downtime threshold, which specifically includes:

Obtain the coolant temperature of the last driving cycle and the current ambient temperature;

Calculate the difference between the coolant temperature of the last driving cycle and the current ambient temperature to obtain the target cooling temperature difference;

Determine a second downtime threshold corresponding to the target heat dissipation temperature difference according to a second preset mapping relationship;

Wherein, the corresponding relationship between the heat dissipation temperature difference and the second shutdown time threshold is recorded in the second preset mapping relationship.

Professionals can further realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the possible For interchangeability, in the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be directly implemented by hardware, software modules executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not 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 (5)

1. An engine downtime verification method, comprising:

the method comprises the steps of obtaining engine stop time, a target historical parameter representing the running process of a vehicle in the previous driving cycle, a target current parameter representing the running state of the engine in the current driving cycle and a first stop time threshold;

if the engine stop time is smaller than the first stop time threshold, judging whether the target historical parameters meet a first check condition;

if the target historical parameter meets the first check condition, judging whether the target current parameter meets a second check condition;

if the target current parameter meets the second check condition, judging that the engine stop time is not credible;

the target history parameters include: engine run time, mileage, and coolant temperature of the last driving cycle;

the judging whether the target historical parameter meets a first check condition includes:

if at least one of the engine running time is greater than a running time threshold, the mileage is greater than a mileage threshold, and the coolant temperature of the previous driving cycle is greater than a first coolant temperature threshold is met, determining that the target historical parameter meets a first check condition;

determining that the target historical parameter does not satisfy the first check condition if the engine run time is not greater than the run time threshold, the mileage is not greater than the mileage threshold, and the coolant temperature of the last driving cycle is not greater than the first coolant temperature;

the target current parameters include: the coolant temperature, the engine oil temperature and the pre-vortex exhaust temperature of the current driving cycle;

the judging whether the current target parameter meets a second check condition includes:

if at least one of the coolant temperature of the current driving cycle is smaller than a second coolant temperature threshold value, the engine oil temperature is smaller than an engine oil temperature threshold value and the pre-vortex exhaust temperature is smaller than an exhaust temperature threshold value is met, determining that the target current parameter meets a second check condition;

if the coolant temperature of the current driving cycle is not less than the second coolant temperature threshold, the engine oil temperature is not less than the engine oil temperature threshold, and the pre-turbo exhaust temperature is not less than the exhaust temperature threshold, determining that the target current parameter does not satisfy the second check condition;

if the engine stopping time is credible, or the engine stopping time is more than or equal to the first stopping time threshold, or the target current parameter does not meet the second check condition, resetting the dew point detection success state identification bit;

correcting an initial energy threshold value of dew point detection to obtain a target energy threshold value;

and carrying out dew point detection according to the target energy threshold value.

2. The engine downtime verification method of claim 1, wherein the process of obtaining the first downtime threshold comprises:

acquiring the temperature of the cooling liquid of the previous driving cycle and the temperature of the cooling liquid of the current driving cycle;

calculating a difference value between the coolant temperature of the previous driving cycle and the coolant temperature of the current driving cycle to obtain a target coolant temperature difference value;

determining a first stop time threshold corresponding to the target cooling liquid temperature difference value according to a first preset mapping relation;

and the corresponding relation between the temperature difference value of the cooling liquid and the first stop time threshold value is recorded in the first preset mapping relation.

3. The engine downtime verification method of claim 1, wherein the modifying the initial energy threshold for dew point detection to obtain a target energy threshold comprises:

acquiring a second downtime threshold;

wherein the second downtime threshold is greater than the first downtime threshold;

if the engine stop time is larger than or equal to the second stop time threshold, taking the initial energy threshold as a target energy threshold;

if the engine stop time is smaller than the second stop time threshold, determining a correction coefficient according to the engine stop time;

and correcting the initial energy threshold value of the dew point detection according to the correction coefficient to obtain a target energy threshold value.

4. The engine downtime verification method of claim 3, wherein the obtaining a second downtime threshold comprises:

acquiring the temperature of the cooling liquid of the previous driving cycle and the current environmental temperature;

calculating a difference value between the temperature of the cooling liquid in the previous driving cycle and the current environment temperature to obtain a target heat dissipation temperature difference value;

determining a second shutdown time threshold corresponding to the target heat dissipation temperature difference value according to a second preset mapping relation;

and recording a corresponding relation between the heat dissipation temperature difference value and a second shutdown time threshold value in the second preset mapping relation.

5. An engine downtime verification apparatus, comprising:

the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the engine stop time, a target historical parameter representing the running process of a vehicle in the previous driving cycle, a target current parameter representing the running state of the engine in the current driving cycle and a first stop time threshold;

the first judgment unit is used for judging whether the target historical parameters meet first verification conditions or not if the engine shutdown time is smaller than the first shutdown time threshold;

the second judging unit is used for judging whether the target current parameter meets a second check condition or not if the target historical parameter meets the first check condition;

the judging unit is used for judging that the engine stop time is not credible if the target current parameter meets the second check condition;

the target history parameters include: engine run time, mileage, and coolant temperature of the last driving cycle;

the first determining unit, configured to determine whether the target history parameter meets a first verification condition, specifically includes:

if at least one of the engine running time is greater than a running time threshold, the mileage is greater than a mileage threshold, and the coolant temperature of the previous driving cycle is greater than a first coolant temperature threshold is met, determining that the target historical parameter meets a first check condition;

determining that the target historical parameter does not satisfy the first check condition if the engine run time is not greater than the run time threshold, the mileage is not greater than the mileage threshold, and the coolant temperature of the last driving cycle is not greater than the first coolant temperature;

the target current parameters include: the coolant temperature, the engine oil temperature and the pre-vortex exhaust temperature of the current driving cycle;

the second determining unit is configured to, when determining whether the current target parameter meets a second check condition, specifically include:

if at least one of the coolant temperature of the current driving cycle is smaller than a second coolant temperature threshold value, the engine oil temperature is smaller than an engine oil temperature threshold value and the pre-turbo exhaust temperature is smaller than an exhaust temperature threshold value is met, determining that the target current parameter meets a second check condition;

if the coolant temperature of the current driving cycle is not less than the second coolant temperature threshold, the engine oil temperature is not less than the engine oil temperature threshold, and the pre-turbo exhaust temperature is not less than the exhaust temperature threshold, determining that the target current parameter does not satisfy the second check condition;

the resetting unit is used for resetting the dew point detection success state identification bit if the engine stop time is not credible, or the engine stop time is more than or equal to a first stop time threshold value, or the target current parameter does not meet a second check condition;

the correcting unit is used for correcting the initial energy threshold value of the dew point detection to obtain a target energy threshold value;

and the detection unit is used for carrying out dew point detection according to the target energy threshold value.

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