CN103321809A - Oil injector fault checking method and device - Google Patents
Oil injector fault checking method and device Download PDFInfo
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- CN103321809A CN103321809A CN2013102845597A CN201310284559A CN103321809A CN 103321809 A CN103321809 A CN 103321809A CN 2013102845597 A CN2013102845597 A CN 2013102845597A CN 201310284559 A CN201310284559 A CN 201310284559A CN 103321809 A CN103321809 A CN 103321809A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention discloses an oil injector fault checking method. The method includes presetting a relation table between working parameters and rated oil return amount of oil injectors; and in a working state of an engine, executing the steps: acquiring current oil return flow of an oil injector oil return pipe of each air cylinder of the engine and working parameters of the current oil injector; inquiring the relation table according to the working parameters of the current oil injector, and acquiring a judging result that the corresponding oil injector is in a fault state on the condition that the current oil return amount is inconsistent with the rated oil return amount of the corresponding oil injector. Operation can be performed in a work site of the engine without detaching the oil injectors, the method is simple to execute in operation, faulted oil injectors can be judged accurately and rapidly, working efficiency of maintenance staff is improved, and labor intensity is reduced. In addition, a device is low in cost and can be configured in engine maintenance sites. On the basis, the invention further provides an oil injector fault checking device.
Description
Technical field
The present invention relates to vehicle power fault detection technique field, be specifically related to a kind of oil sprayer trouble shooting method and device.
Background technique
Be accompanied by domestic automobile pollutant emission rules and progressively upgrade, the electronic control technology of engine art is developed and is come into operation.The motor of employing mechanical pump control fuel feeding different from the past, the control system of electric-controlled co-rail motor is by receiving the signal of each sensor, and the output fuel injection pulse signal is to oil sprayer, by means of the solenoid valve on the oil sprayer, accurate control fuel injection amount and discharge time do work to provide energy with atomized diesel fuel direct cylinder injection internal combustion; Thus, guarantee combustion ratio, atomizing and the best firing time of diesel engine the best, and good Economy and minimum disposal of pollutants.
Wherein, the functional reliability of oil nozzle directly affects the spray characteristics of oil sprayer.
In the practical work process, if oil sprayer breaks down, can not correctly require an amount of fuel oil is sprayed into the firing chamber according to control with directly causing, at this moment will feel motor or variation has occured the vehicle operation performance, but cause the reason of motor or vehicle abnormal more, sometimes need to investigate one by one; Obviously, for electric-control motor, carrying out faut detection for oil sprayer needs special test stand to come the state signal of simulated engine, then the detected oil sprayer of control is tested, for example, according to the oil spout moment of the control oil spout that imposes a condition, injection duration is measured from the amount of fuel of oil sprayer ejection by test stand.
Yet, adopt the state of injector testing equipment test oil sprayer oil sprayer must be removed from motor, that is, off-line type is measured, and labor intensity is large, and operation is more loaded down with trivial details.In addition, because test stand needs some signals of simulated engine could drive oil sprayer, complicated structure, cost compare is high.
In view of this, the oil sprayer of demanding urgently looking for another way for existing electric-controlled co-rail motor proposes a kind of fault detection method, to avoid the existing above-mentioned drawback of off-line measurement technology.
Summary of the invention
For defects, the technical problem that the present invention solves is to provide a kind of oil sprayer fault detection method, to realize online faut detection, effectively evades off-line type and measures existing defective.On this basis, the present invention also provides a kind of oil sprayer Fail detecting apparatus.
Oil sprayer fault detection method provided by the invention, the relation table between default oil sprayer work parameter and the specified recirculating oil quantity; And under engine behavior, carry out following step: obtain the current oil return flow of the oil sprayer return tube of each cylinder of motor, and current oil sprayer work parameter; Inquire about described relation table according to described current oil sprayer work parameter, inconsistent as condition take the described specified recirculating oil quantity of described current oil return flow and corresponding oil sprayer, obtain the judged result that corresponding described oil sprayer is in fault state.
Preferably, described oil sprayer work parameter is control endurance and common rail pressure.
Preferably, described specified recirculating oil quantity is that to be specially to calculate rating value be the value range that fluctuates and form in the basis.
Preferably, described specified recirculating oil quantity is that to be specially to calculate rating value be basis 10% value range that forms that fluctuates.
Oil sprayer Fail detecting apparatus provided by the invention comprises a plurality of flow collections unit, storage unit and control unit; Wherein, a plurality of described flow collections unit is used for being separately positioned on the oil injector oil return pipeline of each cylinder of motor, to obtain current oil return flow; Described storage unit is used for storing default oil sprayer work parameter and the relation table between the specified recirculating oil quantity; Described control unit is used for receiving the described current oil return flow that a plurality of described flow collections unit gathers, and inquire about described relation table according to current oil sprayer work parameter, inconsistent as condition take the described specified recirculating oil quantity of described current oil return flow and corresponding oil sprayer, obtain the judged result that corresponding described oil sprayer is in fault state.
Preferably, described oil sprayer work parameter is control endurance and common rail pressure.
Preferably, described control unit reads described control endurance and common rail pressure from the motor control unit.
Preferably, described specified recirculating oil quantity is that to be specially to calculate rating value be basis 10% value range that forms that fluctuates.
Preferably, also comprise the flow quantity display unit that links to each other with a plurality of described flow collections unit.
Preferably, also comprise: a plurality of air bubble sensors, for the oil injector oil return pipeline that is separately positioned on each cylinder of motor, to obtain the air bubble content in the described oil injector oil return pipeline; Described control unit obtains the sealing state of the installation sealing surface of corresponding described oil sprayer and firing chamber also according to described air bubble content.
Use detecting method provided by the present invention, can be under the stable operating mode at motor and carry out.Particularly, obtain the current oil return flow of the oil sprayer return tube of each cylinder of motor, and current oil sprayer work parameter; According to the default relation table of current oil sprayer work parameter inquiry, determine and the corresponding specified recirculating oil quantity of current oil sprayer work parameter with this, and then inconsistent as condition take current oil return flow and corresponding specified recirculating oil quantity, obtain the judged result that corresponding oil sprayer is in fault state.Compared with prior art, this inspection method can operate at the engine operation scene, and does not need to dismantle oil sprayer, carries out the method operation comparatively simple, differentiates quickly and accurately the oil sprayer that breaks down, and improves maintenance man's working efficiency, reduces labor intensity.In addition, this installation cost cost is lower, and the engine maintenance website is all configurable.
Description of drawings
Fig. 1 shows the FB(flow block) of the described oil sprayer fault detection method of embodiment;
Fig. 2 is the skeleton diagram of the described oil sprayer Fail detecting apparatus of embodiment;
Fig. 3 is the overall structure schematic diagram of the described oil sprayer Fail detecting apparatus of embodiment.
Among the figure:
Motor 1, oil injector oil return pipeline 2, computer terminal 3, storage unit 31, control unit 32, flow quantity display unit 4, fuel tank 5, flow collection unit 6.
Embodiment
Core of the present invention provides a kind of oil sprayer fault detection method, to realize online faut detection, effectively evades off-line type and measures existing defective.Specify present embodiment below in conjunction with Figure of description.
See also Fig. 1, the figure shows the FB(flow block) of the described oil sprayer fault detection method of present embodiment.
This detecting method is used for carrying out under the engine operating state fault judgement of oil sprayer.As shown in Figure 1, this detecting method comprises the steps:
S1, the relation table between default oil sprayer work parameter and the specified recirculating oil quantity; Here, specified recirculating oil quantity is the theoretical threshold value that obtains of calculating.Should be appreciated that under different model motor, the different operating mode, the specified recirculating oil quantity corresponding with oil sprayer work parameter is all not identical.
S2 obtains the current oil return flow of the oil sprayer return tube of each cylinder of motor, take six cylinder engine as example, then needs to gather respectively the current recirculating oil quantity of six oil sprayer return tubes; Simultaneously, obtain current oil sprayer work parameter, obviously, be used for characterizing the oil sprayer working state under the present engine operating mode, can preferably control endurance and common rail pressure, wherein, the control endurance refers to control the time span that oil sprayer is opened oil spout, common rail pressure refers to the pressure of oil-fired system common rail pipe, i.e. oil spout pressure constantly, and oil sprayer recirculating oil quantity rating value is the recirculating oil quantity of this oil sprayer theory under the common rail pressure of the control endurance that requires, requirement.
Following table is with the default relation table that forms of one group of oil sprayer, to carry out exemplary illustration.
S3, according to the default relation table of current oil sprayer work parameter inquiry, that is to say, determine and the corresponding specified recirculating oil quantity threshold value of current oil sprayer work parameter with this, and then inconsistent as condition take current oil return flow and corresponding specified recirculating oil quantity, obtain the judged result that corresponding oil sprayer is in fault state.
Certainly, abovementioned steps S2 and S3 all carry out under engine behavior.
Preferred control endurance and common rail pressure are characterized by oil sprayer work parameter in this programme.Need to prove, need according to the function of this parameter in this programme, can also select other parameters to characterize.Do not repeat them here.
Wherein, specified recirculating oil quantity can be the value range that fluctuates as the basis and form to calculate the rating value recirculating oil quantity.Preferably, can calculate on the basis of rating value shown in the upper table, 10% value range that forms fluctuates; That is to say, when the recirculating oil quantity deviation is fluctuating in 10%, be considered as current oil return flow consistent with the specified recirculating oil quantity of corresponding oil sprayer, oil sprayer is in good condition; Otherwise the specified recirculating oil quantity of current oil return flow and corresponding oil sprayer is inconsistent, is considered as unusual.Based on this, in the one group of oil sprayer that embodies in upper table, sequence number 4,5 and 6 obvious abnormal states of oil sprayer are considered as being in fault state.Be equivalent to, compare by measured value and theoretical value, calculated difference, the quality of judgement oil sprayer.
Except aforementioned oil sprayer fault detection method, present embodiment also provides a kind of Fail detecting apparatus.Please in the lump referring to Fig. 2, the figure shows the skeleton diagram of the Fail detecting apparatus of using the method.
As shown in Figure 2, this oil sprayer Fail detecting apparatus mainly comprises a plurality of flow collections unit 6, storage unit 31 and control unit 32; Wherein, a plurality of flow collections unit 6 is used for being separately positioned on the oil injector oil return pipeline 2 of motor 1 each cylinder, obtains respectively the current oil return flow that flows back to fuel tank 5 through each oil injector oil return pipeline 2; Storage unit 31 is used for storing default oil sprayer work parameter and the relation table between the specified recirculating oil quantity; Control unit 32 is used for receiving the current oil return flow that a plurality of flow collections unit 6 gathers, and inquire about described relation table according to current oil sprayer work parameter, inconsistent as condition take the specified recirculating oil quantity of current oil return flow and corresponding oil sprayer, obtain the judged result that corresponding oil sprayer is in fault state.In this programme, the parts that storage unit 31 and control unit 32 can be put for Independent also can adopt computer terminal 3 to realize the corresponding function of storage unit 31 and control unit 32.
Similarly, oil sprayer work parameter can be control endurance and common rail pressure.Specified recirculating oil quantity can be 10% value range that forms that fluctuates as the basis take the calculating rating value.Wherein, control unit 32 can read described control endurance and common rail pressure from motor control unit ECU, and certainly, the control endurance wherein can adopt other modes to obtain, and reads and be not limited to from ECU.
Use oil sprayer fault detection method provided by the invention, can also adopt 6 microtest tubes, carry out the flow of return line in the certain hour, in fact, only need to select a manual time-keeping namely can satisfy the measurement needs.
The flow quantity display unit 4 that links to each other with a plurality of flow collections unit 6 can also be set the current recirculating oil quantity of each oil sprayer in order to show in real time.Specifically see also the overall structure schematic diagram of oil sprayer Fail detecting apparatus shown in Figure 3.Be understandable that; terminal computer 3 can receive the current oil return flow that a plurality of flow collections unit 6 gather from flow display unit 4, also can be directly and corresponding flow collection unit 6, and obvious; Placement shown in the figure, the scheme of asking for protection for the application is not construed as limiting.
In addition, this oil sprayer Fail detecting apparatus can also comprise a plurality of air bubble sensor (not shown)s, is used for being separately positioned on the oil injector oil return pipeline of each cylinder of motor, to obtain the air bubble content in the described oil injector oil return pipeline; Based on this, control unit obtains the sealing state of the installation sealing surface of corresponding oil sprayer and firing chamber also according to air bubble content.That is to say, use detection device of the present invention can the sealing state of oil sprayer fuel feeding sealing surface be checked, if occur bubble in the oil return, just need the installation sealing surface of oil sprayer and firing chamber to check, prevent that oil-fired system lost efficacy.Certainly, also transparent pipeline can be set at the return line of each oil sprayer, so that the oil return situation is carried out Real Time Monitoring, and then monitor air bubble content in the oil return by personnel.
To sum up, the present invention is according to the oil sprayer work characteristics, can judge the quality of its current state by one group of oil sprayer recirculating oil quantity conformity with the deviation of theoretical value, the method structure realizes simple, can the operation vehicle on on-line measurement, avoided the dismounting link, effectively reduced intensity of workers, can greatly increase work efficiency.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. an oil sprayer fault detection method is characterized in that, the relation table between default oil sprayer work parameter and the specified recirculating oil quantity; And under engine behavior, carry out following step:
Obtain the current oil return flow of the oil sprayer return tube of each cylinder of motor, and current oil sprayer work parameter;
Inquire about described relation table according to described current oil sprayer work parameter, inconsistent as condition take the described specified recirculating oil quantity of described current oil return flow and corresponding oil sprayer, obtain the judged result that corresponding described oil sprayer is in fault state.
2. oil sprayer fault detection method according to claim 1 is characterized in that, described oil sprayer work parameter is control endurance and common rail pressure.
3. oil sprayer fault detection method according to claim 1 and 2 is characterized in that, described specified recirculating oil quantity is that to be specially to calculate rating value be the value range that fluctuates and form in the basis.
4. oil sprayer fault detection method according to claim 3 is characterized in that, described specified recirculating oil quantity is that to be specially to calculate rating value be basis 10% value range that forms that fluctuates.
5. an oil sprayer Fail detecting apparatus is characterized in that, comprising:
A plurality of flow collections unit is for the oil injector oil return pipeline that is separately positioned on each cylinder of motor, to obtain current oil return flow;
Storage unit is used for storing default oil sprayer work parameter and the relation table between the specified recirculating oil quantity;
Control unit, be used for receiving the described current oil return flow that a plurality of described flow collections unit gathers, and inquire about described relation table according to current oil sprayer work parameter, inconsistent as condition take the described specified recirculating oil quantity of described current oil return flow and corresponding oil sprayer, obtain the judged result that corresponding described oil sprayer is in fault state.
6. oil sprayer Fail detecting apparatus according to claim 5 is characterized in that, described oil sprayer work parameter is control endurance and common rail pressure.
7. oil sprayer Fail detecting apparatus according to claim 6 is characterized in that, described control unit reads described control endurance and common rail pressure from the motor control unit.
8. each described oil sprayer Fail detecting apparatus in 7 according to claim 5 is characterized in that, described specified recirculating oil quantity is that to be specially to calculate rating value be basis 10% value range that forms that fluctuates.
9. oil sprayer Fail detecting apparatus according to claim 8 is characterized in that, also comprises the flow quantity display unit that links to each other with a plurality of described flow collections unit.
10. oil sprayer Fail detecting apparatus according to claim 5 is characterized in that, also comprises:
A plurality of air bubble sensors are for the oil injector oil return pipeline that is separately positioned on each cylinder of motor, to obtain the air bubble content in the described oil injector oil return pipeline;
Described control unit obtains the sealing state of the installation sealing surface of corresponding described oil sprayer and firing chamber also according to described air bubble content.
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| CN201310284559.7A CN103321809B (en) | 2013-07-08 | 2013-07-08 | Oil injector fault checking method and device |
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| CN201310284559.7A CN103321809B (en) | 2013-07-08 | 2013-07-08 | Oil injector fault checking method and device |
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Cited By (7)
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| CN108051223A (en) * | 2017-09-30 | 2018-05-18 | 河北华北柴油机有限责任公司 | A kind of engine low pressure oil way monitoring system and monitoring method |
| CN108678881A (en) * | 2018-03-26 | 2018-10-19 | 潍柴动力股份有限公司 | The detection method and detection device of fuel injector reliability |
| CN109209668A (en) * | 2018-09-28 | 2019-01-15 | 潍柴动力股份有限公司 | Fuel injector Block failure diagnostic method and device |
| CN111765009A (en) * | 2020-07-02 | 2020-10-13 | 浙江吉利新能源商用车集团有限公司 | Oil supply method and system for engine and vehicle |
| CN112526969A (en) * | 2020-11-27 | 2021-03-19 | 一拖(洛阳)柴油机有限公司 | Method for detecting performance of common rail engine ECU |
| CN113279863A (en) * | 2021-06-30 | 2021-08-20 | 宁波华工热控科技有限公司 | Vehicle dual-fuel system operation control method and system |
| CN114673588A (en) * | 2022-03-09 | 2022-06-28 | 潍柴动力股份有限公司 | Method and device for judging engine operation fault |
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| CN112526969A (en) * | 2020-11-27 | 2021-03-19 | 一拖(洛阳)柴油机有限公司 | Method for detecting performance of common rail engine ECU |
| CN113279863A (en) * | 2021-06-30 | 2021-08-20 | 宁波华工热控科技有限公司 | Vehicle dual-fuel system operation control method and system |
| CN114673588A (en) * | 2022-03-09 | 2022-06-28 | 潍柴动力股份有限公司 | Method and device for judging engine operation fault |
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