CN106907229A

CN106907229A - The control method and control device of a kind of electronic water pump of engine

Info

Publication number: CN106907229A
Application number: CN201710090225.4A
Authority: CN
Inventors: 吴广权; 乔艳菊; 夏锌; 林承伯; 罗泽清; 刘巨江
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2017-02-20
Filing date: 2017-02-20
Publication date: 2017-06-30
Anticipated expiration: 2037-02-20
Also published as: CN110067632B; CN110067633B; CN110067633A; CN110067632A; CN106907229B; CN110056422A; CN110056422B

Abstract

The present invention relates to engine-cooling system technical field, disclose the control method and control device of a kind of electronic water pump of engine, after the running parameter for obtaining electronic water pump, when running parameter does not meet default condition of work, Fisrt fault level signal is sent to electronic water pump and engine, so that electronic water pump and engine carry out corresponding troubleshooting according to Fisrt fault level signal；Judged by the running parameter to electronic water pump in itself; make it possible to judge that electronic water pump is broken down and the failure to electronic water pump is processed in time in time; and engine is controlled simultaneously; so as to avoid the damage of engine scuffing and parts, and then realize the effective protection to electronic water pump and engine.

Description

The control method and control device of a kind of electronic water pump of engine

Technical field

The present invention relates to engine-cooling system technical field, more particularly to a kind of control of the electronic water pump of engine Method and control device.

Background technology

At present, the method for diagnosing faults of the electronic water pump of existing engine is generally basede on the state of engine body and enters OK, mainly there are following two method for diagnosing faults：(1) coolant temperature in cooling system, ECU are gathered by temperature sensor (electronic control unit) is analyzed judgement according to coolant temperature to the situation of being heated of present engine, when coolant temperature is super When crossing threshold value, ECU judges engine overheat, and rotating speed and moment of torsion during by the parameter limitation engine rotation such as oil spout igniting, Until engine is shut down；(2) engine body increase temperature sensor, using temperature sensor gather coolant temperature with And the metal temperature of cylinder body or cylinder cap, and the difference of the metal temperature of coolant temperature and cylinder body or cylinder cap is calculated by ECU Value, when the difference that both differences exceed threshold value or both temperature changes rapidly, ECU judges that cooling system breaks down, And rotating speed and moment of torsion during by the parameter limitation engine rotation such as oil spout igniting, until engine is shut down.

But, the state that the above two diagnostic method of the electronic water pump of engine is all based on engine body is carried out, Its working condition not to electronic water pump body judges, because the change of coolant temperature under normal circumstances has sluggishness Property so that failure occurs, coolant temperature is raised from engine scuffing and damage of components certain time interval, enters And cause in time judge that electronic water pump breaks down, so as to lead to not that engine is effectively protected in time.

The content of the invention

It is an object of the invention to provide a kind of control method of the electronic water pump of engine, to solve to judge in time The technical problem that electronic water pump breaks down, so as to avoid the damage of engine scuffing and parts.

In order to solve the above-mentioned technical problem, the present invention provides a kind of control method of the electronic water pump of engine, including：

Obtain the running parameter of electronic water pump；

When the running parameter does not meet default condition of work, the is sent to the electronic water pump and the engine One failure level signal, so that the electronic water pump and the engine are carried out accordingly according to the Fisrt fault level signal Troubleshooting.

Preferably, the running parameter of the electronic water pump is the storage battery being carried on the electronic water pump Pressure；

It is described when the running parameter does not meet default condition of work, sent out to the electronic water pump and the engine Fisrt fault level signal is sent, so that the electronic water pump and the engine carry out phase according to the Fisrt fault level signal The troubleshooting answered is specifically included：

Judge whether the battery tension meets default voltage threshold；

When the battery tension does not meet default voltage threshold, sent to the electronic water pump and the engine Fisrt fault level signal, so that the electronic water pump and the engine are carried out accordingly according to the Fisrt fault level signal Troubleshooting.

Preferably, it is described to judge whether the battery tension meets default voltage threshold and be specially：

Judge the battery tension whether more than default upper voltage limit threshold value；

It is described when the battery tension does not meet default voltage threshold, to the electronic water pump and the engine Fisrt fault level signal is sent, so that the electronic water pump and the engine are carried out according to the Fisrt fault level signal Corresponding troubleshooting is specially：

When the battery tension is more than default upper voltage limit threshold value, sent out to the electronic water pump and the engine Fisrt fault level signal is sent, so that the electronic water pump and the engine carry out phase according to the Fisrt fault level signal The troubleshooting answered；Wherein, the Fisrt fault level signal is specially shuts down the electronic water pump, the engine is to limit The signal that the rotating speed and moment of torsion of system are rotated.

Preferably, described when the battery tension is more than default upper voltage limit threshold value, to the electricity Sub- water pump and the engine send Fisrt fault level signal, so that the electronic water pump and the engine are according to described the One failure level signal also include after corresponding troubleshooting：

Calculate the difference of the upper voltage limit threshold value and the battery tension；

When the upper voltage limit threshold value is more than default first voltage difference limen value with the difference of the battery tension, make The electronic water pump and the engine recover normal work.

Obtain the duration of the Fisrt fault level signal；

When the duration of the Fisrt fault level signal is more than default first duration threshold value, to the engine The second failure level signal is sent, so that the engine is carried out at corresponding failure according to the second failure level signal Reason；Wherein, the second failure level signal is specially the signal for shutting down the engine.

Judge the battery tension whether less than default lower voltage limit threshold value；

When the battery tension is less than default lower voltage limit threshold value, sent out to the electronic water pump and the engine Fisrt fault level signal is sent, so that the electronic water pump and the engine carry out phase according to the Fisrt fault level signal The troubleshooting answered；Wherein, the Fisrt fault level signal is specially shuts down the electronic water pump, the engine is to limit The signal that the rotating speed and moment of torsion of system are rotated.

Preferably, described when the battery tension is less than default lower voltage limit threshold value, to the electricity Sub- water pump and the engine send Fisrt fault level signal, so that the electronic water pump and the engine are according to described the One failure level signal also include after corresponding troubleshooting：

Calculate the difference of the battery tension and the lower voltage limit threshold value；

When the battery tension is more than default second voltage difference limen value with the difference of the lower voltage limit threshold value, make The electronic water pump and the engine recover normal work.

Obtain the duration of the Fisrt fault level signal；

When the duration of the Fisrt fault level signal is more than default second duration threshold value, to the engine The second failure level signal is sent, so that the engine is carried out at corresponding failure according to the second failure level signal Reason；Wherein, the second failure level signal is specially the signal for shutting down the engine.

Preferably, the running parameter for obtaining electronic water pump is specially the electric current for obtaining the electronic water pump；

Judge the electric current of the electronic water pump whether more than default upper current limit threshold value；

When the electric current of the electronic water pump is more than default upper current limit threshold value, to the electronic water pump and described start Machine sends Fisrt fault level signal, so that the electronic water pump and the engine enter according to the Fisrt fault level signal The corresponding troubleshooting of row, until the electric current of the electronic water pump is less than default upper current limit threshold value；Wherein, first event Barrier level signal is specially the signal for rotating the electronic water pump reduction of speed.

Preferably, the electric current for obtaining electronic water pump is specifically included：

Obtain the rotating speed of the electronic water pump；

Power and the graph of a relation of the rotating speed of the electronic water pump according to the default electronic water pump, obtain the electronics The power of water pump；

Acquisition is carried in the battery tension on the electronic water pump；

Calculate the electric current of the electronic water pump；Wherein, the electric current of the electronic water pump is equal to the power of the electronic water pump With the ratio of the battery tension.

Preferably, described when the electric current of the electronic water pump is more than default upper current limit threshold value, to institute State electronic water pump and the engine sends Fisrt fault level signal, so that the electronic water pump and the engine are according to institute Stating Fisrt fault level signal also include after corresponding troubleshooting：

Obtain the coolant temperature of the engine；

When the coolant temperature of the engine is more than default first temperature upper limit threshold value, sent to the engine Second failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Its In, the second failure level signal is specially the signal of the rotating speed and moment of torsion rotation for limiting the engine.

Obtain the duration of the Fisrt fault level signal；

When the duration of the Fisrt fault level signal reaches default 3rd duration threshold value, make the electronic water Pump recovers normal work, until the electric current of the electronic water pump is more than default upper current limit threshold value.

Obtain the rotating speed of the electronic water pump；

When the rotating speed of the electronic water pump reaches default lower rotation speed limit threshold value, to the electronic water pump and described start Machine sends the second failure level signal, so that the electronic water pump and the engine enter according to the second failure level signal The corresponding troubleshooting of row；Wherein, the second failure level signal is specially shuts down the electronic water pump, the engine With the signal that the rotating speed and moment of torsion that limit are rotated.

Preferably, described when the rotating speed of the electronic water pump reaches default lower rotation speed limit threshold value, to institute State electronic water pump and the engine sends the second failure level signal, so that the electronic water pump and the engine are according to institute Stating the second failure level signal also include after corresponding troubleshooting：

Obtain the duration of the second failure level signal；

When the duration of the second failure level signal reaches default 4th duration threshold value, make the electronic water Pump is worked with lowest power；

Obtain the duration that the electronic water pump is worked with lowest power；

When the electronic water pump reaches default 5th duration threshold value with the duration that lowest power works, make described Electronic water pump is restarted；

Obtain the number of times that the electronic water pump is restarted；

When the number of times that the electronic water pump is restarted more than it is default restart the upper limit number of times when, to the electronic water pump and described Engine sends the 3rd failure level signal, so that the electronic water pump and the engine are believed according to the 3rd failure rank Number carry out corresponding troubleshooting；Wherein, the 3rd failure level signal is specially makes the electronic water pump shut down and described The signal that engine is shut down.

Preferably, the running parameter for obtaining electronic water pump is specifically included：

Obtain the coolant temperature of the engine；

Judge the coolant temperature of the engine whether more than default warming-up temperature threshold；

When the coolant temperature of the engine is more than default warming-up temperature threshold, turning for the electronic water pump is obtained Speed；

Judge the rotating speed of the electronic water pump whether less than default lower rotation speed limit threshold value；

When the rotating speed of the electronic water pump is less than default lower rotation speed limit threshold value, to the electronic water pump and described start Machine sends Fisrt fault level signal, so that the electronic water pump and the engine enter according to the Fisrt fault level signal The corresponding troubleshooting of row；Wherein, the Fisrt fault level signal is specially makes electronic water pump weight under stall pattern The signal for opening.

Preferably, it is described when the rotating speed of the electronic water pump is less than default lower rotation speed limit threshold value, to described Electronic water pump and the engine send Fisrt fault level signal, so that the electronic water pump and the engine are according to Fisrt fault level signal carries out corresponding troubleshooting and specifically includes：

Obtain the duration of the electronic water pump operation；

When the duration of electronic water pump operation reaches default 6th duration threshold value, the electronic water pump is judged Rotating speed whether be less than default lower rotation speed limit threshold value；

When the rotating speed of the electronic water pump is less than default lower rotation speed limit threshold value, holding for the electronic water pump operation is judged Whether continuous duration reaches default 7th duration threshold value；

When the duration of electronic water pump operation reaches default 7th duration threshold value, the electronic water pump is judged Rotating speed whether be less than default lower rotation speed limit threshold value；

When the rotating speed of the electronic water pump is less than default lower rotation speed limit threshold value, the electronic water pump is set to be stopped；

Obtain the duration that the electronic water pump is stopped；

When the duration that the electronic water pump is stopped reaches default 8th duration threshold value, make the electronic water Pump is worked with lowest power；

When the electronic water pump reaches default 9th duration threshold value with the duration that lowest power works, institute is judged Whether the rotating speed of electronic water pump is stated less than default lower rotation speed limit threshold value；

When the duration that the electronic water pump is stopped reaches default tenth duration threshold value, to the electronic water Pump sends Fisrt fault level signal, so that the electronic water pump carries out corresponding failure according to the Fisrt fault level signal Treatment, until the rotating speed of the electronic water pump is more than default lower rotation speed limit threshold value.

Preferably, the control method of the electronic water pump of described engine also includes：

Judge the coolant temperature of the engine whether more than default first reliability temperature threshold；

When the coolant temperature of the engine is more than default first reliability temperature threshold, sent to the engine Second failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Its In, the second failure level signal is specially the signal of the rotating speed and moment of torsion rotation for limiting the engine.

Preferably, described when the coolant temperature of the engine is more than default first reliability temperature threshold When, the second failure level signal is sent to the engine, so that the engine enters according to the second failure level signal Also include after the corresponding troubleshooting of row：

Obtain the duration of second failure；

When the duration of second failure is more than default 11st duration threshold value, the is sent to the engine Three failure level signals, so that the engine carries out corresponding troubleshooting according to the 3rd failure level signal；Wherein, The 3rd failure level signal is specially and makes the engine stopping signal.

Preferably, the running parameter of the electronic water pump is the rotating speed of the electronic water pump；

Judge the rotating speed of the electronic water pump whether more than default rotating speed upper limit threshold；

When the rotating speed of the electronic water pump is more than default rotating speed upper limit threshold, to the electronic water pump and described start Machine sends Fisrt fault level signal, so that the electronic water pump and the engine enter according to the Fisrt fault level signal The corresponding troubleshooting of row；Wherein, the Fisrt fault level signal is specially makes the electronic water pump weigh in the idle mode The signal for opening.

Preferably, it is described when the rotating speed of the electronic water pump is more than default rotating speed upper limit threshold, to described Electronic water pump and the engine send Fisrt fault level signal, so that the electronic water pump and the engine are according to Fisrt fault level signal carries out corresponding troubleshooting and specifically includes：

Obtain the duration of the electronic water pump operation；

When the duration of electronic water pump operation reaches default 12nd duration threshold value, the electronic water is judged Whether the rotating speed of pump is more than default rotating speed upper limit threshold；

When the rotating speed of the electronic water pump is more than default rotating speed upper limit threshold, holding for the electronic water pump operation is judged Whether continuous duration reaches default 13rd duration threshold value；

When whether the duration of electronic water pump operation reaches default 13rd duration threshold value, the electricity is judged Whether the rotating speed of sub- water pump is more than default rotating speed upper limit threshold；

When the rotating speed of the electronic water pump is more than default rotating speed upper limit threshold, the electronic water pump is set to be stopped；

Obtain the duration that the electronic water pump is stopped；

When the duration that the electronic water pump is stopped reaches default 14th duration threshold value, to the electronics Water pump and the engine send Fisrt fault level signal, so that the electronic water pump and the engine are according to described first Failure level signal carries out corresponding troubleshooting, until the rotating speed of the electronic water pump is less than default rotating speed upper limit threshold.

Judge the coolant temperature of the engine whether more than default second reliability temperature threshold；

When the coolant temperature of the engine is more than default second reliability temperature threshold, sent to the engine Second failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Its In, the second failure level signal is specially the signal of the rotating speed and moment of torsion rotation for limiting the engine.

Preferably, described when the coolant temperature of the engine is more than default second reliability temperature threshold When, the second failure level signal is sent to the engine, so that the engine enters according to the second failure level signal Also include after the corresponding troubleshooting of row：

Obtain the duration of second failure；

When the duration of second failure is more than default 15th duration threshold value, the is sent to the engine Three failure level signals, so that the engine carries out corresponding troubleshooting according to the 3rd failure level signal；Wherein, The 3rd failure level signal is specially the signal for shutting down the engine.

Obtain the coolant temperature of the engine；

Judge the coolant temperature of the engine whether more than default second temperature upper limit threshold；

When the engine coolant temperature be more than default second temperature upper limit threshold when, make the electronic water pump with Full power operation；

Calculate the difference of the second temperature upper limit threshold and the coolant temperature of the engine；

When the second temperature upper limit threshold is more than first temperature with the difference of the coolant temperature of the engine During difference limen value, the electronic water pump is set to recover normal work；

Judge the coolant temperature of the engine whether more than default 3rd temperature upper limit threshold value；Wherein, described Three temperature upper limit threshold values are more than the second temperature upper limit threshold；

When the coolant temperature of the engine is more than default 3rd temperature upper limit threshold value, sent to the engine Second failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Its In, the second failure level signal is specially the engine with the rotating speed and moment of torsion turn signal for limiting；

Calculate the difference of the 3rd temperature upper limit threshold value and the coolant temperature of the engine；

When the 3rd temperature upper limit threshold value is more than the second temperature with the difference of the coolant temperature of the engine During difference limen value, the engine is set to recover normal work；

Judge the coolant temperature of the engine whether more than default 4th temperature upper limit threshold value；Wherein, described Four temperature upper limit threshold values are more than the 3rd temperature upper limit threshold value；

When the coolant temperature of the engine is more than default 4th temperature upper limit threshold value, sent to the engine 3rd failure level signal, so that the engine carries out corresponding troubleshooting according to the 3rd failure level signal；Its In, the 3rd failure level signal is specially the signal for shutting down the engine；

Obtain the duration of the 3rd failure level signal；

When the duration of the 3rd failure level signal is more than default 16th duration threshold value, to the electronic water Pump sends the 4th failure level signal, so that the electronic water pump carries out corresponding failure according to the 4th failure level signal Treatment；Wherein, the 4th failure level signal is specially the signal for shutting down the electronic water pump.

In order to solve identical technical problem, the present invention also provides a kind of control device of the electronic water pump of engine, wraps Include：

Running parameter acquisition module, the running parameter for obtaining electronic water pump；

Electronic water pump and engine failure processing module, for not meeting default condition of work when the running parameter When, Fisrt fault level signal is sent to the electronic water pump and the engine, so as to the electronic water pump and described start Machine carries out corresponding troubleshooting according to the Fisrt fault level signal.

Preferably, the trouble-shooter of the electronic water pump is used to perform the electronic water pump of above-mentioned engine Control method.

The present invention provides a kind of control method of the electronic water pump of engine, after the running parameter for obtaining electronic water pump, When running parameter does not meet default condition of work, Fisrt fault level signal is sent to electronic water pump and engine, so that Electronic water pump and engine carry out corresponding troubleshooting according to Fisrt fault level signal；By the work to electronic water pump in itself Judged as parameter, enabling judge that electronic water pump breaks down and the failure to electronic water pump is located in time in time Reason, and engine is controlled simultaneously, so as to avoid the damage of engine scuffing and parts, and then realize to electronic water Effective protection of pump and engine.

Brief description of the drawings

Fig. 1 is the flow chart of the control method of the electronic water pump of the engine in the embodiment of the present invention；

Fig. 2 is the flow chart of step S12 the first implementation method in the embodiment of the present invention；

Fig. 3 is the flow chart of second implementation method of step S12 in the embodiment of the present invention；

Fig. 4 is the flow chart of the step S11 in the embodiment of the present invention；

Fig. 5 is the flow chart of step S12 the third implementation method in the embodiment of the present invention；

Fig. 6 is the flow chart of the step S122 of electronic water pump in the embodiment of the present invention under stall pattern；

Fig. 7 is the 4th kind of flow chart of implementation method of step S12 in the embodiment of the present invention；

Fig. 8 be electronic water pump in the embodiment of the present invention in the idle mode the step of S122 flow chart；

Fig. 9 is the structured flowchart of the control device of the electronic water pump of the engine in the embodiment of the present invention.

Specific embodiment

With reference to the accompanying drawings and examples, specific embodiment of the invention is described in further detail.Hereinafter implement Example is not limited to the scope of the present invention for illustrating the present invention.

As shown in figure 1, a kind of flow chart of the embodiment of the control method of the electronic water pump of engine of the invention, bag Include：

S11, obtains the running parameter of electronic water pump；

S12, when the running parameter does not meet default condition of work, sends out to the electronic water pump and the engine Fisrt fault level signal is sent, so that the electronic water pump and the engine carry out phase according to the Fisrt fault level signal The troubleshooting answered.

In embodiments of the present invention, after the running parameter for obtaining the electronic water pump, when the running parameter does not meet During default condition of work, Fisrt fault level signal is sent to the electronic water pump and the engine, so that the electronics Water pump and the engine carry out corresponding troubleshooting according to the Fisrt fault level signal；By to the electronic water pump The running parameter of itself is judged, enabling judge that the electronic water pump breaks down and to the electronic water pump in time Failure processed in time, and the engine is controlled simultaneously, so as to avoid the engine scuffing and zero The damage of part, and then realize the effective protection to the electronic water pump and the engine.

Preferably, the running parameter of the electronic water pump is the battery tension being carried on the electronic water pump；

As shown in Fig. 2 in the first implementation method of the step S12, the step S12 is specifically included：

S121, judges whether the battery tension meets default voltage threshold；

S122, when the battery tension does not meet default voltage threshold, to the electronic water pump and described starts Machine sends Fisrt fault level signal, so that the electronic water pump and the engine enter according to the Fisrt fault level signal The corresponding troubleshooting of row.

In embodiments of the present invention, led in order to avoid too high due to the battery tension being carried on the electronic water pump The power that causes the electronic water pump is too high, heating is serious, so as to cause the internal component damage of the electronic water pump, the present embodiment In the step S121 be specially：

The step S122 in the present embodiment is specially：

When the battery tension is more than default upper voltage limit threshold value, sent out to the electronic water pump and the engine Fisrt fault level signal is sent, so that the electronic water pump and the engine carry out phase according to the Fisrt fault level signal The troubleshooting answered；Wherein, the Fisrt fault level signal is specially shuts down the electronic water pump, the engine is to limit The signal that the rotating speed and moment of torsion of system are rotated.Shut down by making the electronic water pump, rotating speed and moment of torsion of the engine to limit Rotate, to reduce thermic load, so as to avoid damaging the electronic water pump and the engine.

In embodiments of the present invention, in order to avoid being pressed in default upper voltage limit Near Threshold back and forth when the storage battery During fluctuation, the working condition of the electronic water pump and the engine frequently switches, so as to avoid damaging the electronic water pump With the engine, also include after the step S122 in the present embodiment：

In embodiments of the present invention, because the electronic water pump is shut down, the internal coolant of the engine is caused not flow It is dynamic, so as to the coolant temperature value of the engine for causing temperature sensor to read will not change, and then cause nothing Method judges whether the inside of the engine overheats.In order to avoid the over-heat inside of the engine, in this embodiment described Also include after step S122：

Obtain the duration of the Fisrt fault level signal；

When the duration of the Fisrt fault level signal is more than default first duration threshold value, to the engine The second failure level signal is sent, so that the engine is carried out at corresponding failure according to the second failure level signal Reason；Wherein, the second failure level signal is specially the signal for shutting down the engine.By limiting the engine The rotating speed and moment of torsion of system are shut down after rotating the first duration threshold value, it is to avoid cause to damage described because the engine interior is overheated Engine.

In embodiments of the present invention, in order to avoid when the battery tension is too low, the electronic water pump and the hair The motor of motivation causes voltage degradation due to starting simultaneously, so as to cause the electronic water pump and the engine cannot Response starts, and the step S121 in the present embodiment is specially：

The step S122 in the present embodiment is specially：

When the battery tension is less than default lower voltage limit threshold value, sent out to the electronic water pump and the engine Fisrt fault level signal is sent, so that the electronic water pump and the engine carry out phase according to the Fisrt fault level signal The troubleshooting answered；Wherein, the Fisrt fault level signal is specially shuts down the electronic water pump, the engine is to limit The signal that the rotating speed and moment of torsion of system are rotated.Shut down by making the electronic water pump, rotating speed and moment of torsion of the engine to limit Rotate, to ensure that voltage no longer declines, so that the rotating speed for maintaining the engine to limit and moment of torsion are rotated.

In embodiments of the present invention, in order to avoid being pressed in default lower voltage limit Near Threshold back and forth when the storage battery During fluctuation, the working condition of the electronic water pump and the engine frequently switches, so as to avoid damaging the electronic water pump With the engine, also include after the step S122 in the present embodiment：

Obtain the duration of the Fisrt fault level signal；

When the duration of the Fisrt fault level signal is more than default second duration threshold value, to the engine The second failure level signal is sent, so that the engine is carried out at corresponding failure according to the second failure level signal Reason；Wherein, the second failure level signal is specially the signal for shutting down the engine.By limiting the engine The rotating speed and moment of torsion of system are shut down after rotating the second duration threshold value, to avoid causing the hair because the engine interior is overheated Motivation is damaged.

Preferably, the electronic water pump is damaged in order to avoid the electric current due to the electronic water pump is too high and described is started The electronic component of machine, the step S11 in the present embodiment is specially the electric current for obtaining the electronic water pump；

As shown in figure 3, in second implementation method of the step S12, the step S12 is specifically included：

Whether S121, judge the electric current of the electronic water pump more than default upper current limit threshold value；

S122, when the electric current of the electronic water pump is more than default upper current limit threshold value, to the electronic water pump and institute State engine and send Fisrt fault level signal, so that the electronic water pump and the engine are according to the Fisrt fault rank Signal carries out corresponding troubleshooting, until the electric current of the electronic water pump is less than default upper current limit threshold value；Wherein, it is described Fisrt fault level signal is specially the signal for rotating the electronic water pump reduction of speed.By reducing turning for the electronic water pump Speed, to reduce the power of the electronic water pump, so as to reduce the electric current of the electronic water pump, and then avoids damaging the electronic water The electronic component of pump and the engine.

In embodiments of the present invention, in order to accurately obtain the electric current of the electronic water pump, described in the acquisition in the present embodiment The electric current of electronic water pump is specifically included：

Obtain the rotating speed of the electronic water pump；

Acquisition is carried in the battery tension on the electronic water pump；

In embodiments of the present invention, it is described to start in order to avoid in the reduction of the rotating speed of the electronic water pump, flow-reduction The coolant temperature for being caused the engine due to Load lifting of machine is raised, so as to cause to damage the engine, at this Also include after also including after the step S122 in implementation：

Obtain the coolant temperature of the engine；

When the coolant temperature of the engine is more than default first temperature upper limit threshold value, sent to the engine Second failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Its In, the second failure level signal is specially the signal of the rotating speed and moment of torsion rotation for limiting the engine.By making The engine is rotated with the rotating speed and moment of torsion for limiting, to reduce the load of the engine, so as to avoid starting described in damage Machine.

In embodiments of the present invention, in order to ensure when the electric current of the electronic water pump recover it is normal when, the electronic water pump Normal work can be recovered, also included after the step S122 in this embodiment：

Obtain the duration of the Fisrt fault level signal；

In embodiments of the present invention, when the rotating speed of the electronic water pump drops to default lower rotation speed limit threshold value, if The electric current of the electronic water pump is also greater than default upper current limit threshold value, then may be deposited due to the internal wiring of the electronic water pump Cause it cannot to continue normal work in problem, in order to avoid the internal wiring problem due to the electronic water pump to described Electronic water pump causes to damage, and also includes after the step S122 in this embodiment

Obtain the rotating speed of the electronic water pump；

When the rotating speed of the electronic water pump reaches default lower rotation speed limit threshold value, to the electronic water pump and described start Machine sends the second failure level signal, so that the electronic water pump and the engine enter according to the second failure level signal The corresponding troubleshooting of row；Wherein, the second failure level signal is specially shuts down the electronic water pump, the engine With the signal that the rotating speed and moment of torsion that limit are rotated.Shut down by making the electronic water pump, to avoid the operation of the electronic water pump, The electronic water pump is caused to damage so as to avoid the internal wiring problem due to the electronic water pump；Simultaneously as described Electronic water pump is shut down, therefore the engine is rotated with the rotating speed and moment of torsion that limit, to avoid damaging the engine.

In embodiments of the present invention, confirm in order to the electric current to the electronic water pump is too high, while avoiding by institute The internal wiring for stating electronic water pump there is a problem of serious and cause to damage the electronic water pump and the engine, in this implementation Described in example when the rotating speed of the electronic water pump reaches default lower rotation speed limit threshold value, to the electronic water pump and described start Machine sends the second failure level signal, so that the electronic water pump and the engine enter according to the second failure level signal Also include after the corresponding troubleshooting of row：

Obtain the duration of the second failure level signal；

Obtain the number of times that the electronic water pump is restarted；

When the number of times that the electronic water pump is restarted more than it is default restart the upper limit number of times when, to the electronic water pump and described Engine sends the 3rd failure level signal, so that the electronic water pump and the engine are believed according to the 3rd failure rank Number carry out corresponding troubleshooting；Wherein, the 3rd failure level signal is specially makes the electronic water pump shut down and described The signal that engine is shut down.Confirm whether the electric current of the electronic water pump is too high by repeatedly restarting the electronic water pump, After confirming that the electric current of the electronic water pump is too high, because the internal wiring of the electronic water pump there is a problem of serious, it is necessary to make The electronic water pump is shut down and the engine is shut down, to avoid damaging the electronic water pump and the engine.

As shown in figure 4, in order to avoid the coolant temperature of the engine be more than default warming-up temperature threshold when, by Foreign matters from being blocked inside the cooling system of the electronic water pump and cause the rotating speed of the electronic water pump to reduce, so as to cause State electronic water pump stall phenomenon occur and enter stall pattern, the step S11 in the present embodiment is specifically included：

S111, obtains the coolant temperature of the engine；

Whether S112, judge the coolant temperature of the engine more than default warming-up temperature threshold；

S113, when the coolant temperature of the engine is more than default warming-up temperature threshold, obtains the electronic water pump Rotating speed；

As shown in figure 5, in the third implementation method of the step S12, the step S12 is specifically included：

Whether S121, judge the rotating speed of the electronic water pump less than default lower rotation speed limit threshold value；

S122, when the rotating speed of the electronic water pump is less than default lower rotation speed limit threshold value, to the electronic water pump and institute State engine and send Fisrt fault level signal, so that the electronic water pump and the engine are according to the Fisrt fault rank Signal carries out corresponding troubleshooting；Wherein, the Fisrt fault level signal is specially makes the electronic water pump in stall mould The signal restarted under formula.Constantly restarted by making the electronic water pump, with inside the cooling system for excluding the electronic water pump Foreign matters from being blocked, it is to avoid there is stall phenomenon in the electronic water pump.

As shown in fig. 6, the stall failure in order to solve the electronic water pump, the step S122 in the present embodiment is specific Including：

S1221, obtains the duration of the electronic water pump operation；

S1222, when the duration of electronic water pump operation reaches default 6th duration threshold value, judges the electricity Whether the rotating speed of sub- water pump is less than default lower rotation speed limit threshold value；

S1223, when the rotating speed of the electronic water pump is less than default lower rotation speed limit threshold value, judges the electronic water pump fortune Whether capable duration reaches default 7th duration threshold value；

S1224, when the duration of electronic water pump operation reaches default 7th duration threshold value, judges the electricity Whether the rotating speed of sub- water pump is less than default lower rotation speed limit threshold value；

S1225, when the rotating speed of the electronic water pump is less than default lower rotation speed limit threshold value, stops the electronic water pump Work；

S1226, obtains the duration that the electronic water pump is stopped；

S1227, when the duration that the electronic water pump is stopped reaches default 8th duration threshold value, makes described Electronic water pump is worked with lowest power；

S1228, obtains the duration that the electronic water pump is worked with lowest power；

S1229, when the electronic water pump reaches default 9th duration threshold value with the duration that lowest power works, Judge the rotating speed of the electronic water pump whether less than default lower rotation speed limit threshold value；

S12210, when the rotating speed of the electronic water pump is less than default lower rotation speed limit threshold value, stops the electronic water pump Only work；

S12211, when the duration that the electronic water pump is stopped reaches default tenth duration threshold value, to institute State electronic water pump and send Fisrt fault level signal, so that the electronic water pump carries out phase according to the Fisrt fault level signal The troubleshooting answered, until the rotating speed of the electronic water pump is more than default lower rotation speed limit threshold value.

In embodiments of the present invention, in order to avoid in the reduction of the rotating speed of the electronic water pump, flow-reduction, due to described The Load lifting of engine and cause the coolant temperature of the engine to raise, the engine is damaged caused by, this The control method of the electronic water pump of the described engine in embodiment also includes：

When the coolant temperature of the engine is more than default first reliability temperature threshold, sent to the engine Second failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Its In, the second failure level signal is specially the signal of the rotating speed and moment of torsion rotation for limiting the engine.By making The engine is rotated with the rotating speed and moment of torsion for limiting, to reduce the load of the engine, so as to avoid starting described in damage Machine.

In embodiments of the present invention, in order to avoid when the electronic water pump be in stall pattern under when, the engine Coolant temperature is continued above default first reliability temperature threshold, so as to avoid damaging the engine, in the present embodiment The coolant temperature when engine when being more than default first reliability temperature threshold, send the to the engine Two failure level signals, so that the engine carries out being gone back after corresponding troubleshooting according to the second failure level signal Including：

Obtain the duration of second failure；

When the duration of second failure is more than default 11st duration threshold value, the is sent to the engine Three failure level signals, so that the engine carries out corresponding troubleshooting according to the 3rd failure level signal；Wherein, The 3rd failure level signal is specially and makes the engine stopping signal.Shut down by making the engine, to reduce The coolant temperature of engine is stated, so as to avoid damaging the engine.

Preferably, come off in order to avoid the impeller due to the electronic water pump, coolant leakage and cause electronic water pump Rotating speed is raised, and enters idle mode so as to cause the electronic water pump idle running phenomenon occur, the electronics in the present embodiment The running parameter of water pump is the rotating speed of the electronic water pump；

As shown in fig. 7, in the 4th kind of implementation method of the step S12, the step S12 is specifically included：

Whether S121, judge the rotating speed of the electronic water pump more than default rotating speed upper limit threshold；

S122, when the rotating speed of the electronic water pump is more than default rotating speed upper limit threshold, to the electronic water pump and institute State engine and send Fisrt fault level signal, so that the electronic water pump and the engine are according to the Fisrt fault rank Signal carries out corresponding troubleshooting；Wherein, the Fisrt fault level signal is specially makes the electronic water pump in idle running mould The signal restarted under formula.

As shown in figure 8, the DRY RUN fault in order to solve the electronic water pump, the step S122 in the present embodiment is specific Including：

S1221, obtains the duration of the electronic water pump operation；

S1222, when the duration of electronic water pump operation reaches default 12nd duration threshold value, judges described Whether the rotating speed of electronic water pump is more than default rotating speed upper limit threshold；

S1223, when the rotating speed of the electronic water pump is more than default rotating speed upper limit threshold, judges the electronic water pump fortune Whether capable duration reaches default 13rd duration threshold value；

S1224, when whether the duration of electronic water pump operation reaches default 13rd duration threshold value, judges Whether the rotating speed of the electronic water pump is more than default rotating speed upper limit threshold；

S1225, when the rotating speed of the electronic water pump is more than default rotating speed upper limit threshold, stops the electronic water pump Work；

S1226, obtains the duration that the electronic water pump is stopped；

S1227, when the duration that the electronic water pump is stopped reaches default 14th duration threshold value, to institute State electronic water pump and the engine sends Fisrt fault level signal, so that the electronic water pump and the engine are according to institute Stating Fisrt fault level signal carries out corresponding troubleshooting, until the rotating speed of the electronic water pump is less than the default rotating speed upper limit Threshold value.Constantly restarted by making the electronic water pump, it is described so as to avoid to avoid the zero load work of the electronic water pump There is idle running phenomenon in electronic water pump.

In embodiments of the present invention, the cold of the engine is caused in order to avoid the Load lifting due to the engine But liquid temperature degree is raised, so as to cause to damage the engine, the control of the electronic water pump of the described engine in the present embodiment Method also includes：

When the coolant temperature of the engine is more than default second reliability temperature threshold, sent to the engine Second failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Its In, the second failure level signal is specially the signal of the rotating speed and moment of torsion rotation for limiting the engine.By making The engine is rotated with the rotating speed and moment of torsion for limiting, to reduce the load of the engine, so as to avoid starting described in damage Machine.

In embodiments of the present invention, in order to avoid the electronic water pump be in idle mode under when, the engine Coolant temperature is continued above default second reliability temperature threshold, so as to avoid damaging the engine, in the present embodiment The coolant temperature when engine when being more than default second reliability temperature threshold, send the to the engine Two failure level signals, so that the engine carries out being gone back after corresponding troubleshooting according to the second failure level signal Including：

Obtain the duration of second failure；

When the duration of second failure is more than default 15th duration threshold value, the is sent to the engine Three failure level signals, so that the engine carries out corresponding troubleshooting according to the 3rd failure level signal；Wherein, The 3rd failure level signal is specially the signal for shutting down the engine.Shut down by making the engine, to reduce The coolant temperature of the engine, so as to avoid damaging the engine.

In embodiments of the present invention, the electronics is damaged in order to avoid the COOLANT TEMPERATURE due to the engine Water pump and the engine, the control method of the electronic water pump of the engine described in the present embodiment also include：

Obtain the coolant temperature of the engine；

When the engine coolant temperature be more than default second temperature upper limit threshold when, make the electronic water pump with Full power operation；By making the electronic water pump with full power operation so that the electronic water pump is operated in maximum flow point, from And reduce the temperature of the coolant of the engine.

When the second temperature upper limit threshold is more than first temperature with the difference of the coolant temperature of the engine During difference limen value (3 DEG C), the electronic water pump is set to recover normal work；

When the coolant temperature of the engine is more than default 3rd temperature upper limit threshold value, sent to the engine Second failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Its In, the second failure level signal is specially the engine with the rotating speed and moment of torsion turn signal for limiting；It is described by making Rotating speed and moment of torsion turn signal of the engine to limit, to reduce the thermic load of the engine, so as to reduce the engine Coolant temperature.

When the 3rd temperature upper limit threshold value is more than the second temperature with the difference of the coolant temperature of the engine During difference limen value (3 DEG C), the engine is set to recover normal work；

When the coolant temperature of the engine is more than default 4th temperature upper limit threshold value, sent to the engine 3rd failure level signal, so that the engine carries out corresponding troubleshooting according to the 3rd failure level signal；Its In, the 3rd failure level signal is specially the signal for shutting down the engine；Shut down by making the engine, to drop The coolant temperature of the low engine, so as to avoid damaging the engine.

Obtain the duration of the 3rd failure level signal；

When the duration of the 3rd failure level signal is more than default 16th duration threshold value, to the electronic water Pump sends the 4th failure level signal, so that the electronic water pump carries out corresponding failure according to the 4th failure level signal Treatment；Wherein, the 4th failure level signal is specially the signal for shutting down the electronic water pump.Will in the electronic water pump After the coolant discharge of the engine of boiling, the electronic water pump is stopped.

In order to solve identical technical problem, the present invention also provides a kind of reality of the control device of the electronic water pump of engine Apply example.As shown in figure 9, it is the structured flowchart of the control device of the electronic water pump of engine of the invention, including：

Running parameter acquisition module 11, the running parameter for obtaining electronic water pump；

Electronic water pump and engine failure processing module 12, for not meeting default condition of work when the running parameter When, Fisrt fault level signal is sent to the electronic water pump and the engine, so as to the electronic water pump and described start Machine carries out corresponding troubleshooting according to the Fisrt fault level signal.

In embodiments of the present invention, the running parameter of electronic water pump is obtained by the running parameter acquisition module 11, and By the electronic water pump and engine failure processing module 12 when the running parameter does not meet default condition of work, to The electronic water pump and the engine send Fisrt fault level signal so that the electronic water pump and the engine according to The Fisrt fault level signal carries out corresponding troubleshooting；Sentenced by the running parameter to the electronic water pump in itself It is disconnected, enabling to judge that the electronic water pump is broken down and the failure to the electronic water pump is processed in time in time, And the engine is controlled simultaneously, so as to avoid the damage of the engine scuffing and parts, so realize it is right Effective protection of the electronic water pump and the engine.

Preferably, the trouble-shooter of the electronic water pump is used for the control of the electronic water pump for performing above-mentioned engine Method.

To sum up, the present invention provides a kind of control method of the electronic water pump of engine, is obtaining the work ginseng of electronic water pump After number, when running parameter does not meet default condition of work, Fisrt fault level signal is sent to electronic water pump and engine, So that electronic water pump and engine carry out corresponding troubleshooting according to Fisrt fault level signal；By to electronic water pump in itself Running parameter judged, enabling in time judge electronic water pump break down and the failure to electronic water pump carry out and When process, and engine is controlled simultaneously, so as to avoid the damage of engine scuffing and parts, and then realize to electricity Effective protection of sub- water pump and engine.

The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, on the premise of the technology of the present invention principle is not departed from, some improvement and replacement can also be made, these improve and replace Also should be regarded as protection scope of the present invention.

Claims

1. a kind of control method of the electronic water pump of engine, it is characterised in that including：

Obtain the running parameter of electronic water pump；

When the running parameter does not meet default condition of work, the first event is sent to the electronic water pump and the engine Barrier level signal, so that the electronic water pump and the engine carry out corresponding failure according to the Fisrt fault level signal Treatment.

2. the control method of the electronic water pump of engine as claimed in claim 1, it is characterised in that the work of the electronic water pump It is the battery tension being carried on the electronic water pump as parameter；

It is described when the running parameter does not meet default condition of work, send the to the electronic water pump and the engine One failure level signal, so that the electronic water pump and the engine are carried out accordingly according to the Fisrt fault level signal Troubleshooting is specifically included：

Judge whether the battery tension meets default voltage threshold；

When the battery tension does not meet default voltage threshold, first is sent to the electronic water pump and the engine Failure level signal, so that the electronic water pump and the engine carry out corresponding event according to the Fisrt fault level signal Barrier treatment.

3. the control method of the electronic water pump of engine as claimed in claim 2, it is characterised in that the judgement electric power storage Whether cell voltage meets default voltage threshold is specially：

It is described when the battery tension does not meet default voltage threshold, sent to the electronic water pump and the engine Fisrt fault level signal, so that the electronic water pump and the engine are carried out accordingly according to the Fisrt fault level signal Troubleshooting be specially：

When the battery tension is more than default upper voltage limit threshold value, the is sent to the electronic water pump and the engine One failure level signal, so that the electronic water pump and the engine are carried out accordingly according to the Fisrt fault level signal Troubleshooting；Wherein, the Fisrt fault level signal is specially shuts down the electronic water pump, the engine is limiting The signal that rotating speed and moment of torsion are rotated.

4. the control method of the electronic water pump of engine as claimed in claim 3, it is characterised in that described when the electric power storage When cell voltage is more than default upper voltage limit threshold value, sends Fisrt fault rank to the electronic water pump and the engine and believe Number, so that after the electronic water pump and the engine carry out corresponding troubleshooting according to the Fisrt fault level signal Also include：

When the upper voltage limit threshold value is more than default first voltage difference limen value with the difference of the battery tension, make described Electronic water pump and the engine recover normal work.

5. the control method of the electronic water pump of engine as claimed in claim 3, it is characterised in that described when the electric power storage When cell voltage is more than default upper voltage limit threshold value, sends Fisrt fault rank to the electronic water pump and the engine and believe Number, so that after the electronic water pump and the engine carry out corresponding troubleshooting according to the Fisrt fault level signal Also include：

Obtain the duration of the Fisrt fault level signal；

When the duration of the Fisrt fault level signal is more than default first duration threshold value, sent to the engine Second failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Its In, the second failure level signal is specially the signal for shutting down the engine.

6. the control method of the electronic water pump of engine as claimed in claim 2, it is characterised in that the judgement electric power storage Whether cell voltage meets default voltage threshold is specially：

When the battery tension is less than default lower voltage limit threshold value, the is sent to the electronic water pump and the engine One failure level signal, so that the electronic water pump and the engine are carried out accordingly according to the Fisrt fault level signal Troubleshooting；Wherein, the Fisrt fault level signal is specially shuts down the electronic water pump, the engine is limiting The signal that rotating speed and moment of torsion are rotated.

7. the control method of the electronic water pump of engine as claimed in claim 6, it is characterised in that described when the electric power storage When cell voltage is less than default lower voltage limit threshold value, sends Fisrt fault rank to the electronic water pump and the engine and believe Number, so that after the electronic water pump and the engine carry out corresponding troubleshooting according to the Fisrt fault level signal Also include：

When the battery tension is more than default second voltage difference limen value with the difference of the lower voltage limit threshold value, make described Electronic water pump and the engine recover normal work.

8. the control method of the electronic water pump of engine as claimed in claim 6, it is characterised in that described when the electric power storage When cell voltage is less than default lower voltage limit threshold value, sends Fisrt fault rank to the electronic water pump and the engine and believe Number, so that after the electronic water pump and the engine carry out corresponding troubleshooting according to the Fisrt fault level signal Also include：

Obtain the duration of the Fisrt fault level signal；

When the duration of the Fisrt fault level signal is more than default second duration threshold value, sent to the engine Second failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Its In, the second failure level signal is specially the signal for shutting down the engine.

9. the control method of the electronic water pump of engine as claimed in claim 1, it is characterised in that the acquisition electronic water pump Running parameter be specially the electric current for obtaining the electronic water pump；

When the electric current of the electronic water pump is more than default upper current limit threshold value, sent out to the electronic water pump and the engine Fisrt fault level signal is sent, so that the electronic water pump and the engine carry out phase according to the Fisrt fault level signal The troubleshooting answered, until the electric current of the electronic water pump is less than default upper current limit threshold value；Wherein, the Fisrt fault level Level signal is specially the signal for rotating the electronic water pump reduction of speed.

10. the control method of the electronic water pump of engine as claimed in claim 9, it is characterised in that the acquisition electronic water The electric current of pump is specifically included：

Obtain the rotating speed of the electronic water pump；

Power and the graph of a relation of the rotating speed of the electronic water pump according to the default electronic water pump, obtain the electronic water pump Power；

Acquisition is carried in the battery tension on the electronic water pump；

Calculate the electric current of the electronic water pump；Wherein, the electric current of the electronic water pump is equal to power and the institute of the electronic water pump State the ratio of battery tension.

The control method of the electronic water pump of 11. engines as claimed in claim 9, it is characterised in that described when the electricity When the electric current of sub- water pump is more than default upper current limit threshold value, Fisrt fault level is sent to the electronic water pump and the engine Level signal, so that the electronic water pump and the engine carry out corresponding troubleshooting according to the Fisrt fault level signal Also include afterwards：

Obtain the coolant temperature of the engine；

When the coolant temperature of the engine is more than default first temperature upper limit threshold value, second is sent to the engine Failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Wherein, institute State the signal that the second failure level signal is specially the rotating speed and moment of torsion rotation for limiting the engine.

The control method of the electronic water pump of 12. engine as described in claim 9 or 11, it is characterised in that work as institute described When the electric current for stating electronic water pump is more than default upper current limit threshold value, the first event is sent to the electronic water pump and the engine Barrier level signal, so that the electronic water pump and the engine carry out corresponding failure according to the Fisrt fault level signal Also include after treatment：

Obtain the duration of the Fisrt fault level signal；

When the duration of the Fisrt fault level signal reaches default 3rd duration threshold value, make the electronic water pump extensive Multiple normal work, until the electric current of the electronic water pump is more than default upper current limit threshold value.

The control method of the electronic water pump of 13. engines as claimed in claim 9, it is characterised in that described when the electricity When the electric current of sub- water pump is more than default upper current limit threshold value, Fisrt fault level is sent to the electronic water pump and the engine Level signal, so that the electronic water pump and the engine carry out corresponding troubleshooting according to the Fisrt fault level signal Also include afterwards：

Obtain the rotating speed of the electronic water pump；

When the rotating speed of the electronic water pump reaches default lower rotation speed limit threshold value, sent out to the electronic water pump and the engine The second failure level signal is sent, so that the electronic water pump and the engine carry out phase according to the second failure level signal The troubleshooting answered；Wherein, the second failure level signal is specially shuts down the electronic water pump, the engine is to limit The signal that the rotating speed and moment of torsion of system are rotated.

The control method of the electronic water pump of 14. engines as claimed in claim 13, it is characterised in that described when the electricity When the rotating speed of sub- water pump reaches default lower rotation speed limit threshold value, the second failure level is sent to the electronic water pump and the engine Level signal, so that the electronic water pump and the engine carry out corresponding troubleshooting according to the second failure level signal Also include afterwards：

Obtain the duration of the second failure level signal；

When the duration of the second failure level signal reaches default 4th duration threshold value, make the electronic water pump with Lowest power works；

When the electronic water pump reaches default 5th duration threshold value with the duration that lowest power works, make the electronics Water pump is restarted；

Obtain the number of times that the electronic water pump is restarted；

When the number of times that the electronic water pump is restarted more than it is default restart the upper limit number of times when, to the electronic water pump and described start Machine sends the 3rd failure level signal, so that the electronic water pump and the engine enter according to the 3rd failure level signal The corresponding troubleshooting of row；Wherein, the 3rd failure level signal is specially makes the electronic water pump shutdown start with described The signal that machine is shut down.

The control method of the electronic water pump of 15. engines as claimed in claim 1, it is characterised in that the acquisition electronic water The running parameter of pump is specifically included：

Obtain the coolant temperature of the engine；

When the coolant temperature of the engine is more than default warming-up temperature threshold, the rotating speed of the electronic water pump is obtained；

When the rotating speed of the electronic water pump is less than default lower rotation speed limit threshold value, sent out to the electronic water pump and the engine Fisrt fault level signal is sent, so that the electronic water pump and the engine carry out phase according to the Fisrt fault level signal The troubleshooting answered；Wherein, the Fisrt fault level signal is specially makes what the electronic water pump was restarted under stall pattern Signal.

The control method of the electronic water pump of 16. engines as claimed in claim 15, it is characterised in that described when the electronics When the rotating speed of water pump is less than default lower rotation speed limit threshold value, Fisrt fault rank is sent to the electronic water pump and the engine Signal, so that the electronic water pump and the engine carry out corresponding troubleshooting tool according to the Fisrt fault level signal Body includes：

Obtain the duration of the electronic water pump operation；

When the duration of electronic water pump operation reaches default 6th duration threshold value, turning for the electronic water pump is judged Whether speed is less than default lower rotation speed limit threshold value；

When the rotating speed of the electronic water pump is less than default lower rotation speed limit threshold value, judge that the electronic water pump runs it is lasting when Whether length reaches default 7th duration threshold value；

When the duration of electronic water pump operation reaches default 7th duration threshold value, turning for the electronic water pump is judged Whether speed is less than default lower rotation speed limit threshold value；

Obtain the duration that the electronic water pump is stopped；

When the duration that the electronic water pump is stopped reaches default 8th duration threshold value, make the electronic water pump with Lowest power works；

When the electronic water pump reaches default 9th duration threshold value with the duration that lowest power works, the electricity is judged Whether the rotating speed of sub- water pump is less than default lower rotation speed limit threshold value；

When the duration that the electronic water pump is stopped reaches default tenth duration threshold value, sent out to the electronic water pump Fisrt fault level signal is sent, so that the electronic water pump is carried out at corresponding failure according to the Fisrt fault level signal Reason, until the rotating speed of the electronic water pump is more than default lower rotation speed limit threshold value.

The control method of the electronic water pump of 17. engine as described in claim 15 or 16, it is characterised in that described starts The control method of the electronic water pump of machine also includes：

When the coolant temperature of the engine is more than default first reliability temperature threshold, second is sent to the engine Failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Wherein, institute State the signal that the second failure level signal is specially the rotating speed and moment of torsion rotation for limiting the engine.

The control method of the electronic water pump of 18. engines as claimed in claim 17, it is characterised in that described when the hair When the coolant temperature of motivation is more than default first reliability temperature threshold, sends the second failure rank to the engine and believe Number, so that the engine according to the second failure level signal also include after corresponding troubleshooting：

Obtain the duration of second failure；

When the duration of second failure is more than default 11st duration threshold value, the 3rd event is sent to the engine Barrier level signal, so that the engine carries out corresponding troubleshooting according to the 3rd failure level signal；Wherein, it is described 3rd failure level signal is specially makes the engine stopping signal.

The control method of the electronic water pump of 19. engines as claimed in claim 1, it is characterised in that the electronic water pump Running parameter is the rotating speed of the electronic water pump；

When the rotating speed of the electronic water pump is more than default rotating speed upper limit threshold, sent out to the electronic water pump and the engine Fisrt fault level signal is sent, so that the electronic water pump and the engine carry out phase according to the Fisrt fault level signal The troubleshooting answered；Wherein, the Fisrt fault level signal is specially makes what the electronic water pump was restarted in the idle mode Signal.

The control method of the electronic water pump of 20. engines as claimed in claim 19, it is characterised in that described when the electronics When the rotating speed of water pump is more than default rotating speed upper limit threshold, Fisrt fault rank is sent to the electronic water pump and the engine Signal, so that the electronic water pump and the engine carry out corresponding troubleshooting tool according to the Fisrt fault level signal Body includes：

Obtain the duration of the electronic water pump operation；

When the duration of electronic water pump operation reaches default 12nd duration threshold value, the electronic water pump is judged Whether rotating speed is more than default rotating speed upper limit threshold；

When the rotating speed of the electronic water pump is more than default rotating speed upper limit threshold, judge that the electronic water pump runs it is lasting when Whether length reaches default 13rd duration threshold value；

When whether the duration of electronic water pump operation reaches default 13rd duration threshold value, the electronic water is judged Whether the rotating speed of pump is more than default rotating speed upper limit threshold；

Obtain the duration that the electronic water pump is stopped；

When the duration that the electronic water pump is stopped reaches default 14th duration threshold value, to the electronic water pump Fisrt fault level signal is sent with the engine, so that the electronic water pump and the engine are according to the Fisrt fault Level signal carries out corresponding troubleshooting, until the rotating speed of the electronic water pump is less than default rotating speed upper limit threshold.

The control method of the electronic water pump of 21. engine as described in claim 19 or 20, it is characterised in that described starts The control method of the electronic water pump of machine also includes：

When the coolant temperature of the engine is more than default second reliability temperature threshold, second is sent to the engine Failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Wherein, institute State the signal that the second failure level signal is specially the rotating speed and moment of torsion rotation for limiting the engine.

The control method of the electronic water pump of 22. engines as claimed in claim 21, it is characterised in that described when the hair When the coolant temperature of motivation is more than default second reliability temperature threshold, sends the second failure rank to the engine and believe Number, so that the engine according to the second failure level signal also include after corresponding troubleshooting：

Obtain the duration of second failure；

When the duration of second failure is more than default 15th duration threshold value, the 3rd event is sent to the engine Barrier level signal, so that the engine carries out corresponding troubleshooting according to the 3rd failure level signal；Wherein, it is described 3rd failure level signal is specially the signal for shutting down the engine.

The control method of the electronic water pump of 23. engines as claimed in claim 1, it is characterised in that described engine The control method of electronic water pump also includes：

Obtain the coolant temperature of the engine；

When the coolant temperature of the engine is more than default second temperature upper limit threshold, make the electronic water pump with full work( Rate works；

When the second temperature upper limit threshold is more than the first temperature difference limen with the difference of the coolant temperature of the engine During value, the electronic water pump is set to recover normal work；

Judge the coolant temperature of the engine whether more than default 3rd temperature upper limit threshold value；Wherein, the 3rd temperature Degree upper limit threshold is more than the second temperature upper limit threshold；

When the coolant temperature of the engine is more than default 3rd temperature upper limit threshold value, second is sent to the engine Failure level signal, so that the engine carries out corresponding troubleshooting according to the second failure level signal；Wherein, institute State rotating speed and moment of torsion turn signal that the second failure level signal is specially the engine to limit；

When the 3rd temperature upper limit threshold value is more than the second temperature difference limen with the difference of the coolant temperature of the engine During value, the engine is set to recover normal work；

Judge the coolant temperature of the engine whether more than default 4th temperature upper limit threshold value；Wherein, the 4th temperature Degree upper limit threshold is more than the 3rd temperature upper limit threshold value；

When the coolant temperature of the engine is more than default 4th temperature upper limit threshold value, the 3rd is sent to the engine Failure level signal, so that the engine carries out corresponding troubleshooting according to the 3rd failure level signal；Wherein, institute State the 3rd failure level signal and be specially the signal for shutting down the engine；

Obtain the duration of the 3rd failure level signal；

When the duration of the 3rd failure level signal is more than default 16th duration threshold value, sent out to the electronic water pump The 4th failure level signal is sent, so that the electronic water pump is carried out at corresponding failure according to the 4th failure level signal Reason；Wherein, the 4th failure level signal is specially the signal for shutting down the electronic water pump.

A kind of 24. control devices of the electronic water pump of engine, it is characterised in that including：

Electronic water pump and engine failure processing module, for when the running parameter does not meet default condition of work, to The electronic water pump and the engine send Fisrt fault level signal so that the electronic water pump and the engine according to The Fisrt fault level signal carries out corresponding troubleshooting.

The control device of the electronic water pump of 25. engines as claimed in claim 24, it is characterised in that the electronic water pump Trouble-shooter is used for the control method of the electronic water pump for performing the engine as described in claim any one of 1-23.