CN107975396A - A kind of engine lubrication assistant control method and device - Google Patents

Abstract

The invention provides an engine auxiliary lubrication control method and device, the method is applied to the controller in the engine auxiliary lubrication system, including: real-time detection of the operating state of the engine controller and the current speed of the engine; if the engine controller is powered off state and/or the current speed is less than the speed threshold, obtain the current working time of the electric motor oil pump and the running state of the exhaust temperature sensor; based on the current working time and the running state of the exhaust temperature sensor, control the electric motor oil pump to perform post-lubrication operation, post-lubrication operation Used to characterize lubricating operations after engine shutdown. Based on the method disclosed in the present invention, it can be ensured that the temperature of the supercharger is lowered after the engine is stopped, that is, after the engine is turned off, so as to slow down or even avoid wear and tear caused by excessive temperature of the supercharger.

Description

Method and device for engine auxiliary lubrication control

technical field

The present invention relates to the technical field of engines, and more specifically, relates to an engine auxiliary lubrication control method and device.

Background technique

During normal engine operation, its supercharger removes heat through the flowing oil. After stopping, especially after stopping without idling, the mechanical oil pump will no longer work. If the temperature of the supercharger, especially the floating bearing, is too high at this time, it will cause cracking and deterioration of the engine oil, and it will easily cause supercharger wear when the car is started again. .

Contents of the invention

In view of this, the present invention provides an engine auxiliary lubrication control method and device to solve the problem that the supercharger temperature is too high after parking, which is easy to cause wear. The technical solution is as follows:

A method for controlling auxiliary lubrication of an engine, applied to a controller in an auxiliary lubrication system, comprising:

Real-time detection of the running status of the engine controller and the current speed of the engine;

If the engine controller is in the power-off state and/or the current speed is less than the speed threshold, obtain the current working time of the electric oil pump and the running state of the exhaust temperature sensor;

Based on the current working hours and the operating state of the exhaust gas temperature sensor, the electric motor oil pump is controlled to perform a post-lubrication operation, and the post-lubrication operation is used to characterize the lubrication operation after the engine stops.

Preferably, the controlling the electric motor oil pump to perform post-lubrication operation based on the current working hours and the operating state of the exhaust gas temperature sensor includes:

judging whether the current working time is less than the working time threshold of the electric oil pump;

If the current working time is less than the working time threshold, it is judged whether the exhaust gas temperature sensor is in a normal running state;

If the exhaust temperature sensor is in a normal operating state, judging whether the first current exhaust temperature value fed back by the exhaust temperature sensor is less than a first exhaust temperature threshold;

If the first current exhaust temperature value is not less than the first exhaust temperature threshold, the electric motor oil pump is controlled to perform a post-lubrication operation.

Preferably, it also includes:

If the exhaust gas temperature sensor is not in a normal operating state, it is judged whether the engine operating time of the engine is less than the engine operating time threshold;

If the engine working time is not less than the engine working time threshold, the electric motor oil pump is controlled to perform a post-lubrication operation.

Preferably, said controlling said electric motor oil pump to perform post-lubrication operation, afterwards, also includes:

Troubleshoot the engine's auxiliary lubrication system.

Preferably, the fault diagnosis of the auxiliary lubrication system of the engine includes:

Judging whether the current and post-lubrication duration of the electric motor oil pump is less than the post-lubrication duration threshold;

If the current and post-lubrication duration is not less than the post-lubrication duration threshold, retrieve the initial power of the battery at the start of post-lubrication, and determine whether the difference between the current power of the battery and the initial power is within a preset difference within the allowable range;

If the difference is not within the allowable range of the preset difference, it is determined that the electric motor oil pump is in an abnormal operation state;

If the difference is within the allowable range of the preset difference, obtain the operating state of the oil pressure sensor, and judge whether the oil pressure sensor and the exhaust temperature sensor are both in normal operating state;

If both the engine oil pressure sensor and the exhaust temperature sensor are in normal operation, determine whether the current main oil passage pressure value fed back by the oil pressure sensor is less than the main oil passage pressure threshold, the first value fed back by the exhaust temperature sensor 2. Whether the current exhaust gas temperature value is less than the second exhaust gas temperature threshold;

If the current main oil passage pressure value is less than the main oil passage pressure threshold and the second current exhaust temperature value is not less than the second exhaust temperature threshold, it is determined that the lubrication pipeline is in an abnormal operation state.

Preferably, said controlling said electric motor oil pump to perform post-lubrication operation, afterwards, also includes:

Prompt information for representing that the electric motor oil pump is performing a post-lubrication operation is generated.

An engine auxiliary lubrication control device, comprising: a detection module, an acquisition module and a post-lubrication control module;

The detection module is used to detect the running state of the engine controller and the current speed of the engine in real time;

The obtaining module is configured to obtain the current working time of the electric oil pump and the running state of the exhaust gas temperature sensor if the engine controller is in a power-off state and/or the current speed is lower than a speed threshold;

The post-lubrication control module is configured to control the electric motor oil pump to perform a post-lubrication operation based on the current working hours and the operating state of the exhaust temperature sensor, and the post-lubrication operation is used to represent the lubrication operation after the engine stops .

Preferably, the post-lubrication control module is specifically used for:

judging whether the current working time is less than the working time threshold of the electric oil pump; if the current working time is less than the working time threshold, judging whether the exhaust temperature sensor is in a normal operating state; if the exhaust temperature sensor is in a normal Running state, judging whether the first current exhaust temperature value fed back by the exhaust temperature sensor is less than the first exhaust temperature threshold; if the first current exhaust temperature value is not less than the first exhaust temperature threshold, control The electric motor oil pump performs post-lubrication operation.

Preferably, it also includes: a fault diagnosis module;

The fault diagnosis module is used for fault diagnosis of the auxiliary lubricating system of the engine.

Preferably, the fault diagnosis module is specifically used for:

Judging whether the current and post-lubrication duration of the electric motor oil pump is less than the post-lubrication duration threshold; if the current and post-lubrication duration is not less than the post-lubrication duration threshold, call the initial power of the battery at the start of post-lubrication, and determine whether the battery Whether the difference between the current electric quantity and the initial electric quantity is within the allowable range of the preset difference; if the difference is not within the allowable range of the preset difference, it is determined that the electric motor oil pump is in an abnormal operation state; if The difference is within the allowable range of the preset difference, obtain the operating state of the oil pressure sensor, and judge whether the oil pressure sensor and the exhaust gas temperature sensor are both in the normal operating state; if the oil pressure sensor and the exhaust gas temperature sensor are both in the normal operating state, and it is judged whether the current main oil passage pressure value fed back by the oil pressure sensor is less than the main oil passage pressure threshold and the second current exhaust gas temperature value fed back by the exhaust gas temperature sensor Whether it is less than the second exhaust temperature threshold; if the current main oil passage pressure value is less than the main oil passage pressure threshold and the second current exhaust temperature value is not less than the second exhaust temperature threshold, determine the lubrication pipe The road is not working properly.

Compared with the prior art, the beneficial effects realized by the present invention are:

The above-mentioned engine auxiliary lubrication control method and device provided by the present invention are applied to the controller in the engine auxiliary lubrication system. When it is detected that the engine controller is in the power-off state and/or the current speed is lower than the speed threshold, The electric oil pump is controlled to perform a post-lubrication operation based on the current operating hours of the electric oil pump and the operating state of the exhaust gas temperature sensor.

Based on the method disclosed in the invention, on the basis of the auxiliary lubricating system installed on the engine, the controller can be used to control the electric motor oil pump to perform post-lubrication after shutdown. This can ensure that the supercharger is cooled after the engine is stopped, that is, after the engine is turned off, so as to alleviate or even avoid the wear and tear caused by the excessive temperature of the supercharger.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or 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 only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a method flowchart of an engine auxiliary lubrication control method provided by an embodiment of the present invention;

Fig. 2 is a partial method flowchart of the engine auxiliary lubrication control method provided by the embodiment of the present invention;

Fig. 3 is another method flowchart of the engine auxiliary lubrication control method provided by the embodiment of the present invention;

FIG. 4 is a flow chart of another part of the engine auxiliary lubrication control method provided by the embodiment of the present invention;

Fig. 5 is a schematic structural diagram of an engine auxiliary lubrication control device provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

Post Lubrication: Lubrication performed by the electric motor oil pump after the engine is stopped.

Engine auxiliary lubrication system: refers to the relevant oil circuit composed of electric motor oil pump and branch oil pipe. Among them, the electric motor oil pump is installed on the side of the engine, borrowing the oil pan, oil filter, oil filter, oil cooler, oil pressure sensor and lubricating oil circuit in the original lubrication system of the engine, and welding the branch on the original oil filter The oil pipe, the branch oil pipe is connected to the electric motor oil pump, so that the oil enters the oil filter through the electric motor oil pump. In addition, check valves are installed in front of the mechanical oil pump and the electric oil pump to prevent back suction of the two sets of oil circuits of the mechanical oil pump and the electric oil pump.

An embodiment of the present invention provides a method for controlling auxiliary lubrication of an engine. The method is applied to a controller in an auxiliary lubrication system. The flow chart of the method is shown in Figure 1 and includes the following steps:

S10, real-time detection of the running state of the engine controller and the current speed of the engine;

In this embodiment, there are two operating states of the engine controller, one is a power-on state, and the other is a power-off state. As for the current rotational speed of the engine, the rotational speed sensor can be used to obtain it in real time. Of course, other sensors, such as the rotational angle sensor, can also be used to obtain the current rotational angle first, and then calculate the relevant rotational speed to obtain the current rotational speed. The current rotational speed detection of the engine is carried out in this implementation The examples are not specifically limited, and can be selected according to actual needs, all within the protection scope of this embodiment.

S20, if the engine controller is in the power-off state and/or the current speed is lower than the speed threshold, obtain the current working time of the electric oil pump and the running state of the exhaust temperature sensor;

Engine shutdown is generally realized by powering off the engine controller, but there are other ways to achieve it, such as sending a shutdown signal from the vehicle controller, or dragging the engine to stop the engine on a hybrid vehicle.

For the engine shutdown by powering off the engine controller, since the running state of the engine controller can be collected directly, the engine state can be determined based on the power-on and power-off state of the engine controller, wherein, when the engine controller is in the power-off state, the engine is in shutdown state, otherwise, the engine is not in the shutdown state.

For the engine shutdown by other means, since the shutdown signal cannot be collected directly, the engine speed can be used to determine whether the engine is in the starting state at this time. RPM threshold, the engine is running.

To determine when the vehicle is stopped, that is, when the engine is turned off, it can be determined directly according to the operating state of the engine controller and the engine speed. As long as one or both of the conditions that the engine controller is in the power-off state and the current speed of the engine is lower than the speed threshold are satisfied, it can be determined that the engine is in a stalled state at this time, and post-lubrication can be performed.

In this embodiment, the timer can be used to count the lubrication time from the start of the electric motor oil pump to the current moment as the current working time of the electric motor oil pump.

In addition, there are two operating states of the exhaust gas temperature sensor, one is a normal operating state, and the other is an abnormal operating state. When identifying the current operating state of the exhaust temperature sensor, it can be determined by using the output voltage value of the exhaust temperature sensor and the fed back exhaust temperature value.

For example, first determine whether the output voltage value of the exhaust gas temperature sensor is within the allowable range of the preset voltage; If it is within the allowable range of the preset temperature, it is further judged whether the exhaust gas temperature value fed back is within the allowable range of the preset temperature; if it is not within the allowable range of the preset temperature, it is determined that the exhaust temperature sensor is not in normal operation; If the engine oil pressure sensor is in normal operation. Of course, other methods can also be used, such as the current and the exhaust gas temperature value fed back within a certain period of time to determine the operating state of the exhaust temperature sensor, which is not specifically limited in this embodiment, and can be selectively operated according to actual needs.

S30, based on the current working hours and the operating state of the exhaust temperature sensor, control the electric motor oil pump to perform a post-lubrication operation, and the post-lubrication operation is used to represent the lubrication operation after the engine stops;

During the execution of step S30, since the temperature of the engine supercharger is directly affected by the exhaust temperature, when the exhaust temperature sensor is in a normal operating state, whether to perform post-lubrication can be determined based on the exhaust temperature fed back by it.

When the exhaust gas temperature sensor is not in normal operation, the temperature of the supercharger can also be judged indirectly by the working hours of the engine. For example, when the working time of the engine is short, the temperature of the supercharger will not be very high. Engine operating hours to determine whether to perform post-lubrication.

In the specific implementation process, the process of "controlling the electric motor oil pump to perform post-lubrication operation based on the current working time and the operating state of the exhaust temperature sensor" in step S30 can specifically adopt the following steps, and the method flow chart is shown in Figure 2:

S301, judging whether the current working time is less than the working time threshold of the electric oil pump; if the current working time is less than the working time threshold, execute step S302;

In this embodiment, if the current working time of the electric motor oil pump is not less than the upper limit, that is, the working time threshold, the electric motor oil pump is directly turned off.

S302, judging whether the exhaust temperature sensor is in a normal operating state; if the exhaust temperature sensor is in a normal operating state, execute step S303;

S303, judging whether the first current exhaust temperature value fed back by the exhaust temperature sensor is less than the first exhaust temperature threshold; if the first current exhaust temperature value is not less than the first exhaust temperature threshold, execute step S304;

In this embodiment, if the first current exhaust temperature value fed back by the exhaust temperature sensor is lower than its upper limit, that is, the first exhaust temperature threshold, it indicates that the temperature of the supercharger is low, and post-lubrication is not required.

S304, controlling the electric motor oil pump to perform a post-lubrication operation.

In addition, in some of these embodiments, step S30 also includes the following steps:

If the exhaust gas temperature sensor is not in a normal operating state, it is judged whether the engine operating time of the engine is less than the engine operating time threshold; if the engine operating time is not less than the engine operating time threshold, the electric motor oil pump is controlled to perform post-lubrication operation.

In some of these embodiments, in order to perform fault diagnosis on the auxiliary lubrication system of the engine, the above method further includes the following steps, and the method flow chart is shown in Figure 3:

S40, performing fault diagnosis on the auxiliary lubrication system of the engine.

During the execution of step S40 , some components in the auxiliary lubrication system of the engine can be diagnosed by using information such as battery power, oil pressure and exhaust temperature during the post-lubrication process of the electric motor oil pump.

In the specific implementation process, the process of step S40 "performing fault diagnosis on the auxiliary lubrication system of the engine" can specifically adopt the following steps, and the method flow chart is shown in Figure 4:

S401, judging whether the current and post-lubrication duration of the electric motor oil pump is less than the post-lubrication duration threshold; if the current and post-lubrication duration is not less than the post-lubrication duration threshold, execute step S402;

In this embodiment, if the front and rear lubrication durations of the electric motor oil pump are less than the post-lubrication duration threshold, no operation is performed.

S402, get the initial power of the battery at the start of post-lubrication, and determine whether the difference between the current power of the battery and the initial power is within the allowable range of the preset difference; if the difference is not within the allowable range of the preset difference, execute Step S403; if the difference is within the allowable range of the preset difference, execute step S404;

In this embodiment, the power of the battery at this time can be used, that is, the current power and the initial power of the battery at the moment when the post-lubrication operation is started, to calculate the power consumption of the battery within a period of time after lubrication, which is the difference; if the difference If it is not within the allowable range of the preset difference, it means that the power consumption of the electric motor oil pump is too small or too large, and it is in an abnormal operation state; otherwise, the electric motor oil pump is in a normal operation state.

S403, determining that the electric motor oil pump is in an abnormal operation state;

S404, acquire the operating status of the engine oil pressure sensor and the exhaust temperature sensor, and determine whether the engine oil pressure sensor and the exhaust temperature sensor are in normal operation; if both the engine oil pressure sensor and the exhaust temperature sensor are in normal operation, then perform the step S405;

S405, judging whether the current main oil passage pressure value fed back by the engine oil pressure sensor is less than the main oil passage pressure threshold, and whether the second current exhaust gas temperature value fed back by the exhaust temperature sensor is less than the second exhaust temperature threshold;

When the electric oil pump, engine oil pressure sensor and exhaust temperature sensor are all in normal operation, if the current main oil passage pressure value is less than its lower limit, that is, the main oil passage pressure threshold, the second current exhaust temperature threshold is not less than its upper limit, That is, the second exhaust temperature value, indicating that the oil in the main oil passage is insufficient at this time, and the supercharger has not been cooled to an appropriate temperature. In this embodiment, the size relationship between the first exhaust temperature value and the second exhaust temperature value is not specifically limited in this embodiment.

S406. If the current main oil passage pressure value is less than the main oil passage pressure threshold and the second current exhaust temperature value is not less than the second exhaust temperature threshold, determine that the lubrication pipeline is in an abnormal operation state.

In some of these embodiments, in order to prompt the user for post-lubrication status, the above method further includes the following steps:

Generates a message indicating that the electric motor oil pump is in post-lubrication operation.

Specifically, it is possible to generate corresponding prompt information to remind the user of the post-lubrication status of the electric motor oil pump by monitoring in real time whether the post-lubrication is in progress.

The prompting information can be sent to the prompting device, and the prompting device can provide prompting in a preset form. For example, the prompting device can be a prompting light, and the prompting light can flicker, light up or change display colors to indicate that the electric oil pump is performing post-lubrication operation.

The above steps S301 to S304 are just a preferred implementation of the process of "controlling the electric motor oil pump to perform post-lubrication operation based on the current working time and the operating state of the exhaust gas temperature sensor" in step S30 of the embodiment of the present application. The specific implementation manner of can be set arbitrarily according to one's own needs, and is not limited here.

The above steps S401 to S406 are just a preferred implementation of the process of step S40 "diagnosing the engine's auxiliary lubrication system" in the embodiment of the present application. The specific implementation of this process can be set arbitrarily according to your own needs. This is not limited.

In the engine auxiliary lubrication control method provided by the embodiment of the present invention, when it is detected that the engine controller is in the power-off state and/or the current speed is lower than the speed threshold, based on the current working time of the electric motor oil pump and the running state of the exhaust gas temperature sensor , to control the electric motor oil pump for post-lubrication operation. This can ensure that the supercharger is cooled down after the engine is turned off, so as to slow down or even avoid the wear and tear caused by the high temperature of the supercharger.

Based on the engine auxiliary lubrication control method provided by the above embodiment, the embodiment of the present invention provides a device for performing the above method, its structural diagram is shown in Figure 5, including: a detection module 10, an acquisition module 20 and a post-lubrication control module 30;

The detection module 10 is used to detect the operating state of the engine controller and the current rotational speed of the engine in real time;

An acquisition module 20, configured to acquire the current working hours of the electric oil pump and the operating status of the exhaust gas temperature sensor if the engine controller is in a power-off state and/or the current rotational speed is less than the rotational speed threshold;

The post-lubrication control module 30 is configured to control the electric motor oil pump to perform a post-lubrication operation based on the current working time and the operating state of the exhaust gas temperature sensor, and the post-lubrication operation is used to represent the lubrication operation after the engine stops.

In some of these embodiments, the post-lubrication control module 30 is specifically used for:

Determine whether the current working time is less than the working time threshold of the electric oil pump; if the current working time is less than the working time threshold, judge whether the exhaust temperature sensor is in normal operation; if the exhaust temperature sensor is in normal operation, judge the feedback from the exhaust temperature sensor Whether the first current exhaust temperature value is less than the first exhaust temperature threshold; if the first current exhaust temperature value is not less than the first exhaust temperature threshold, control the electric motor oil pump to perform post-lubrication operation.

In some of these embodiments, the post-lubrication control module 30 is also specifically used for:

If the exhaust gas temperature sensor is not in a normal operating state, it is judged whether the engine operating time of the engine is less than the engine operating time threshold; if the engine operating time is not less than the engine operating time threshold, the electric motor oil pump is controlled to perform post-lubrication operation.

In some of these embodiments, the above-mentioned device also includes the following modules: a fault diagnosis module;

The fault diagnosis module is used for fault diagnosis of the auxiliary lubrication system of the engine.

In some of these embodiments, the fault diagnosis module is specifically used for:

Determine whether the current and post-lubrication duration of the electric motor oil pump is less than the post-lubrication duration threshold; if the current and post-lubrication duration is not less than the post-lubrication duration threshold, call the initial power of the battery at the start of post-lubrication, and judge the difference between the current power and the initial power of the battery Whether it is within the allowable range of the preset difference; if the difference is not within the allowable range of the preset difference, determine that the electric motor oil pump is not in normal operation; if the difference is within the allowable range of the preset difference, obtain the operation of the oil pressure sensor state, and judge whether the oil pressure sensor and exhaust temperature sensor are in normal operation; whether the second current exhaust temperature value fed back by the exhaust gas temperature sensor is less than the second exhaust gas temperature threshold; if the current main oil passage pressure value is less than the main oil passage pressure threshold and the second current exhaust temperature value is not less than 2 Exhaust temperature threshold value, to determine that the lubrication pipeline is in an abnormal operating state.

In some of these embodiments, the above device further includes the following modules: a prompt information generating module;

The prompt information generation module is used to generate prompt information for representing that the electric motor oil pump is performing a post-lubrication operation.

The engine auxiliary lubrication control device provided by the embodiment of the present invention detects that the engine controller is in the power-off state and/or the current speed is lower than the speed threshold, based on the current working time of the electric motor oil pump and the running state of the exhaust gas temperature sensor , to control the electric motor oil pump for post-lubrication operation. This can ensure that the supercharger is cooled down after the engine is turned off, so as to slow down or even avoid the wear and tear caused by the high temperature of the supercharger.

The above is a detailed introduction to the engine auxiliary lubrication control method and device provided by the present invention. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the present invention. method and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be understood as Limitations on the Invention.

It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. For the same and similar parts in each embodiment, refer to each other, that is, Can. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part.

It should also be noted that in this article, relational terms such as first and second etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations Any such actual relationship or order exists between. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to encompass a non-exclusive inclusion such that elements inherent in a process, method, article, or apparatus comprising a set of elements are included or are also included as such , method, article or device inherent in the elements. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

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 (10)

1. a kind of engine lubrication assistant control method, it is characterised in that applied to the controller in auxiliary lubricating system, bag Include：

The current rotating speed of the operating status of detection engine controller and engine in real time；

If the engine controller is in power-down state and/or the current rotating speed is less than rotary speed threshold value, electric motor oil is obtained The work at present duration of pump and the operating status of exhaust gas temperature sensor；

Operating status based on the work at present duration and the exhaust gas temperature sensor, controls the electronic oil pump to carry out Lubrication operation afterwards, the rear lubrication operation are used to characterize the lubrication operation after engine is shut down.

2. according to the method described in claim 1, it is characterized in that, described be based on the work at present duration and the exhaust temperature The operating status of sensor is spent, controls lubrication operation after the electronic oil pump progress, including：

Judge whether the work at present duration is less than the operating time threshold value of the electronic oil pump；

If the work at present duration is less than the operating time threshold value, judge whether exhaust gas temperature sensor is in normal operation State；

If the exhaust gas temperature sensor is in normal operating condition, judge that the first of the exhaust gas temperature sensor feedback is current Whether outlet air temperature is less than first exhaust temperature threshold；

If the first current exhaust gas temperature value is not less than the first exhaust temperature threshold, the electronic oil pump is controlled to carry out Lubrication operation afterwards.

3. according to the method described in claim 2, it is characterized in that, further include：

If the exhaust gas temperature sensor is not at normal operating condition, judge whether the engine operating time of engine is less than Engine operating time threshold value；

If the engine operating time is not less than the engine operating time threshold value, after controlling the electronic oil pump to carry out Lubrication operation.

4. according to the method described in claim 1, it is characterized in that, the control electronic oil pump lubricates behaviour after carrying out Make, afterwards, further include：

Fault diagnosis is carried out to auxiliary engine lubrication system.

5. according to the method described in claim 4, it is characterized in that, described examine auxiliary engine lubrication system progress failure It is disconnected, including：

Judge the electronic oil pump lubricates duration threshold value after whether front and rear lubrication duration is less than；

If described when front and rear lubrication duration is not less than lubrication duration threshold value after described, the first of battery under start time is lubricated after transferring Beginning electricity, and judge whether the current electric quantity of the battery is in default residual quantity allowed band with the residual quantity of the initial quantity of electricity It is interior；

If the residual quantity is not in the default residual quantity allowed band, determine that the electronic oil pump is in abnormal running shape State；

If the residual quantity is in the default residual quantity allowed band, the operating status of engine oil pressure pickup is obtained, and judge Whether the engine oil pressure pickup and the exhaust gas temperature sensor are in normal operating condition；

If the engine oil pressure pickup and the exhaust gas temperature sensor are in normal operating condition, the oil pressure is judged Whether the current main oil gallery pressure value of force snesor feedback is less than main oil gallery pressure threshold value, the exhaust gas temperature sensor is fed back Whether the second current exhaust gas temperature value is less than second exhaust temperature threshold；

If the current main oil gallery pressure value be less than the main oil gallery pressure threshold value and the second current exhaust gas temperature value not Less than the second exhaust temperature threshold, determine that lubricating pipe is in abnormal operational conditions.

6. according to the method described in claim 1, it is characterized in that, the control electronic oil pump lubricates behaviour after carrying out Make, afterwards, further include：

Generation is used for the prompt message for characterizing lubrication operation after the electronic oil pump is carrying out.

A kind of 7. engine lubrication assistant control device, it is characterised in that including：Detection module, acquisition module and rear lubrication control Molding block；

The detection module, for detecting the operating status of engine controller and the current rotating speed of engine in real time；

The acquisition module, if being in power-down state for the engine controller and/or the current rotating speed is less than rotating speed Threshold value, obtains the work at present duration of electronic oil pump and the operating status of exhaust gas temperature sensor；

Lubrication control module after described, for the operation shape based on the work at present duration and the exhaust gas temperature sensor State, controls lubrication operation after the electronic oil pump progress, and the rear lubrication operation is used to characterize the lubrication after engine is shut down Operation.

8. device according to claim 7, it is characterised in that lubrication control module after described, is specifically used for：

Judge whether the work at present duration is less than the operating time threshold value of the electronic oil pump；If during the work at present Length is less than the operating time threshold value, judges whether exhaust gas temperature sensor is in normal operating condition；If the delivery temperature Sensor is in normal operating condition, judges whether the first current exhaust gas temperature value of the exhaust gas temperature sensor feedback is less than First exhaust temperature threshold；If the first current exhaust gas temperature value is not less than the first exhaust temperature threshold, described in control Lubrication operation after electronic oil pump carries out.

9. device according to claim 7, it is characterised in that further include：Fault diagnosis module；

The fault diagnosis module, for carrying out fault diagnosis to auxiliary engine lubrication system.

10. device according to claim 9, it is characterised in that the fault diagnosis module, is specifically used for：

Judge the electronic oil pump lubricates duration threshold value after whether front and rear lubrication duration is less than；It is if described when front and rear lubrication Duration lubricates the initial quantity of electricity of battery under start time, and judge the electricity not less than the rear lubrication duration threshold value after transferring Whether the current electric quantity in pond and the residual quantity of the initial quantity of electricity are in default residual quantity allowed band；If the residual quantity is not at institute State in default residual quantity allowed band, determine that the electronic oil pump is in abnormal operational conditions；If the residual quantity is in described In default residual quantity allowed band, the operating status of engine oil pressure pickup is obtained, and judge the engine oil pressure pickup and institute State whether exhaust gas temperature sensor is in normal operating condition；If the engine oil pressure pickup and delivery temperature sensing Device is in normal operating condition, judges whether the current main oil gallery pressure value of the engine oil pressure pickup feedback is less than main oil Whether road pressure threshold, the second current exhaust gas temperature value of exhaust gas temperature sensor feedback are less than second exhaust temperature threshold Value；If the current main oil gallery pressure value is less than the main oil gallery pressure threshold value and the second current exhaust gas temperature value is not small In the second exhaust temperature threshold, determine that lubricating pipe is in abnormal operational conditions.