CN103321809B - Oil injector fault checking method and device - Google Patents
Oil injector fault checking method and device Download PDFInfo
- Publication number
- CN103321809B CN103321809B CN201310284559.7A CN201310284559A CN103321809B CN 103321809 B CN103321809 B CN 103321809B CN 201310284559 A CN201310284559 A CN 201310284559A CN 103321809 B CN103321809 B CN 103321809B
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- Prior art keywords
- oil
- injector
- oil sprayer
- oil return
- current
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000003134 recirculating effect Effects 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 238000010304 firing Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 134
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Fuel-Injection Apparatus (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
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 injector failures inspection method and device.
Background technique
Progressively upgrade along with domestic automobile pollutant emission regulation, the electronic control technology of engine art is developed and is come into operation.Employing mechanical pump different from the past controls the motor of fuel feeding, the control system of electric-controlled co-rail motor is by receiving the signal of each sensor, and export fuel injection pulse signal to oil sprayer, by means of the solenoid valve on oil sprayer, accurate control fuel injection amount and discharge time, by the acting of atomized diesel fuel direct cylinder injection combustion to provide energy; Thus, ensure the firing time of the combustion ratio of diesel engine the best, atomization and 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 practical work process, if oil sprayer breaks down, correctly according to control overflow, appropriate fuel oil can not be sprayed into firing chamber by directly causing, at this moment motor will be felt or vehicle operation performance there occurs change, but it is more to cause motor or vehicle that abnormal reason occurs, and sometimes needs to investigate one by one; Obviously, for electric-control motor, carrying out faut detection for oil sprayer needs special test stand to carry out the state signal of simulated engine, then the oil sprayer controlling to be detected is tested, such as, according to the oil injection time controlling oil spout that imposes a condition, injection duration, measures the amount of fuel from oil sprayer ejection by test stand.
But 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 urgently looked for another way for existing electric-controlled co-rail motor proposes a kind of fault detection method, to avoid the above-mentioned drawback existing for off-line measurement technology.
Summary of the invention
For above-mentioned defect, the technical problem that the present invention solves is to provide a kind of injector failures detecting method, to realize online faut detection, effectively evades the defect existing for off-line type measurement.On this basis, the present invention also provides a kind of injector failures detection device.
Injector failures detecting method provided by the invention, presets the relation table between oil sprayer work parameter and specified recirculating oil quantity; And under engine behavior, perform following step: the current oil return flow obtaining the oil return of oil injector pipe of each cylinder of motor, and current oil sprayer work parameter; Described relation table is inquired about according to described current oil sprayer work parameter, inconsistent for condition with 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 for controlling endurance and common rail pressure.
Preferably, described specified recirculating oil quantity is be specially to calculate the value range fluctuating based on rating value and formed.
Preferably, described specified recirculating oil quantity is the value range be specially to calculate 10% formation that to fluctuate based on rating value.
Injector failures detection device provided by the invention, comprises multiple flow collection unit, storage unit and control unit; Wherein, multiple described flow collection unit 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 for storing the relation table between default oil sprayer work parameter and specified recirculating oil quantity; The described current oil return flow that described control unit gathers for receiving multiple described flow collection unit, and inquire about described relation table according to current oil sprayer work parameter, inconsistent for condition with 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 for controlling endurance and common rail pressure.
Preferably, described control unit reads described control endurance and common rail pressure from control unit of engine.
Preferably, described specified recirculating oil quantity is the value range be specially to calculate 10% formation that to fluctuate based on rating value.
Preferably, the flow quantity display unit be connected with multiple described flow collection unit is also comprised.
Preferably, also comprise: multiple air bubble sensor, for being separately positioned on the oil injector oil return pipeline of each cylinder of motor, to obtain the air bubble content in described oil injector oil return pipeline; Described control unit, also according to described air bubble content, obtains the sealing state of the installation sealing surface of corresponding described oil sprayer and firing chamber.
Apply detecting method provided by the present invention, can carry out under motor is in a stable operating mode.Particularly, obtain the current oil return flow of the oil return of oil injector pipe of each cylinder of motor, and current oil sprayer work parameter; According to the relation table that current oil sprayer work parameter inquiry is preset, the specified recirculating oil quantity corresponding to current oil sprayer work parameter is determined with this, and then with current oil return flow and corresponding specified recirculating oil quantity inconsistent for condition, obtain the judged result that corresponding oil sprayer is in fault state.Compared with prior art, this inspection method can operate at engine operation scene, and does not need to dismantle oil sprayer, performs the method operation comparatively simple, differentiates the oil sprayer that breaks down quickly and accurately, improve maintenance man's working efficiency, reduce labor intensity.In addition, this installation cost cost is lower, and engine maintenance website is all configurable.
Accompanying drawing explanation
Fig. 1 shows the FB(flow block) of injector failures detecting method described in embodiment;
Fig. 2 is the skeleton diagram of injector failures detection device described in embodiment;
Fig. 3 is the overall structure schematic diagram of injector failures detection device described in embodiment.
In 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 is to provide a kind of injector failures detecting method, to realize online faut detection, effectively evades the defect existing for off-line type measurement.Present embodiment is illustrated below in conjunction with Figure of description.
Refer to Fig. 1, the figure shows the FB(flow block) of injector failures detecting method described in present embodiment.
This detecting method carries out the breakdown judge of oil sprayer under being used for engine operating state.As shown in Figure 1, this detecting method comprises the steps:
S1, presets the relation table between oil sprayer work parameter and specified recirculating oil quantity; Here, specified recirculating oil quantity is the threshold value that theory calculate obtains.Under should be appreciated that different model motor, 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 return of oil injector pipe of each cylinder of motor, for six cylinder engine, then needs the current recirculating oil quantity gathering six oil return of oil injector pipes respectively; Simultaneously, obtain current oil sprayer work parameter, obviously, for characterizing the oil sprayer working state under present engine operating mode, can preferably control endurance and common rail pressure, wherein, the control endurance refers to and controls the time span that oil spout opened by oil sprayer, common rail pressure refers to the pressure of oil-fired system common rail pipe, i.e. the pressure of oil injection time, and oil return of oil injector amount rating value is the recirculating oil quantity of this oil sprayer theory under the common rail pressure of the control endurance required, requirement.
Following table presets the relation table of formation with one group of oil sprayer, to carry out exemplary illustration.
S3, according to the relation table that current oil sprayer work parameter inquiry is preset, that is, the specified recirculating oil quantity threshold value corresponding to current oil sprayer work parameter is determined with this, and then with current oil return flow and corresponding specified recirculating oil quantity inconsistent for condition, obtain the judged result that corresponding oil sprayer is in fault state.
Certainly, abovementioned steps S2 and S3 all performs under engine behavior.
In this programme, preferably control endurance and common rail pressure are characterized by oil sprayer work parameter.It should be noted that, need according to the function of this parameter in this programme, other parameters can also be selected to characterize.Do not repeat them here.
Wherein, specified recirculating oil quantity can for the value range to calculate the formation that to fluctuate based on rating value recirculating oil quantity.Preferably, can calculate on the basis of rating value shown in upper table, the value range of 10% formation that fluctuates; That is, when recirculating oil quantity deviation is when fluctuating within 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 exception.Based on this, in the one group of oil sprayer embodied 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, compared by measured value and theoretical value, calculated difference, judge the quality of oil sprayer.
Except aforementioned injector failures detecting method, present embodiment also provides a kind of Fail detecting apparatus.Please also refer to Fig. 2, the figure shows the skeleton diagram of the Fail detecting apparatus of application the method.
As shown in Figure 2, this injector failures detection device mainly comprises multiple flow collection unit 6, storage unit 31 and control unit 32; Wherein, multiple flow collection unit 6, for being separately positioned on the oil injector oil return pipeline 2 of each cylinder of motor 1, obtains the current oil return flow flowing back to fuel tank 5 through each oil injector oil return pipeline 2 respectively; Storage unit 31 is for storing the relation table between default oil sprayer work parameter and specified recirculating oil quantity; The current oil return flow that control unit 32 gathers for receiving multiple flow collection unit 6, and inquire about described relation table according to current oil sprayer work parameter, inconsistent for condition with 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, storage unit 31 and control unit 32 can be the independent parts arranged, and computer terminal 3 also can be adopted to realize the corresponding function of storage unit 31 and control unit 32.
Similarly, oil sprayer work parameter can for controlling endurance and common rail pressure.Specified recirculating oil quantity can for the value range to calculate 10% formation that to fluctuate based on rating value.Wherein, control unit 32 can read described control endurance and common rail pressure from control unit of engine ECU, and certainly, the control endurance wherein can adopt other modes to obtain, and is not limited to and reads from ECU.
Apply injector failures detecting method provided by the invention, 6 microtest tubes can also be adopted, carry out the flow of return line in certain hour, in fact, only need selection manual time-keeping namely can meet measurement needs.
In order to show the current recirculating oil quantity of each oil sprayer in real time, the flow quantity display unit 4 be connected with multiple flow collection unit 6 can also be set.The overall structure schematic diagram of injector failures detection device specifically shown in Figure 3.Be understandable that; terminal computer 3 can receive from flow quantity display unit 4 the current oil return flow that multiple flow collection unit 6 gathers, also can directly with corresponding flow collection unit 6, obviously; Placement shown in figure, the scheme for the application's request protection is not construed as limiting.
In addition, this injector failures detection device can also comprise multiple air bubble sensor (not shown), for being separately positioned on the oil injector oil return pipeline of each cylinder of motor, to obtain the air bubble content in described oil injector oil return pipeline; Based on this, control unit, also according to air bubble content, obtains the sealing state of the installation sealing surface of corresponding oil sprayer and firing chamber.That is, use detection device of the present invention can check the sealing state of oil sprayer fuel feeding sealing surface, if there is bubble in oil return, just need the installation sealing surface of oil sprayer and firing chamber to check, prevent oil-fired system to lose efficacy.Certainly, also transparent pipeline can be set at the return line of each oil sprayer, to monitor in real time oil return situation, and then by air bubble content in monitored by personnel's oil return.
To sum up, the present invention is according to oil sprayer work characteristics, by one group of oil return of oil injector amount conformity and the quality of its current state can be judged with the deviation of theoretical value, the method structure realizes simple, can run vehicle on on-line measurement, avoid dismounting link, effectively reduce intensity of workers, can greatly increase work efficiency.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles 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 injector failures detecting method, is characterized in that, presets the relation table between oil sprayer work parameter and specified recirculating oil quantity; And under engine behavior, perform following step:
Obtain the current oil return flow of the oil return of oil injector pipe of each cylinder of motor, and current oil sprayer work parameter;
Described relation table is inquired about according to described current oil sprayer work parameter, inconsistent for condition with 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. injector failures detecting method according to claim 1, is characterized in that, described oil sprayer work parameter is for controlling endurance and common rail pressure.
3. injector failures detecting method according to claim 1 and 2, is characterized in that, described specified recirculating oil quantity is be specially to calculate the value range fluctuating based on rating value and formed.
4. injector failures detecting method according to claim 3, is characterized in that, described specified recirculating oil quantity is the value range be specially to calculate 10% formation that to fluctuate based on rating value.
5. an injector failures detection device, is characterized in that, comprising:
Multiple flow collection unit, for being separately positioned on the oil injector oil return pipeline of each cylinder of motor, to obtain current oil return flow;
Storage unit, for storing the relation table between default oil sprayer work parameter and specified recirculating oil quantity;
Control unit, for receiving the described current oil return flow that multiple described flow collection unit gathers, and inquire about described relation table according to current oil sprayer work parameter, inconsistent for condition with 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. injector failures detection device according to claim 5, is characterized in that, described oil sprayer work parameter is for controlling endurance and common rail pressure.
7. injector failures detection device according to claim 6, is characterized in that, described control unit reads described control endurance and common rail pressure from control unit of engine.
8. the injector failures detection device according to any one of claim 5 to 7, is characterized in that, described specified recirculating oil quantity is the value range be specially to calculate 10% formation that to fluctuate based on rating value.
9. injector failures detection device according to claim 8, is characterized in that, also comprises the flow quantity display unit be connected with multiple described flow collection unit.
10. injector failures detection device according to claim 5, is characterized in that, also comprise:
Multiple air bubble sensor, for being separately positioned on the oil injector oil return pipeline of each cylinder of motor, to obtain the air bubble content in described oil injector oil return pipeline;
Described control unit, also according to described air bubble content, obtains the sealing state of the installation sealing surface of corresponding described oil sprayer and firing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310284559.7A CN103321809B (en) | 2013-07-08 | 2013-07-08 | Oil injector fault checking method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310284559.7A CN103321809B (en) | 2013-07-08 | 2013-07-08 | Oil injector fault checking method and device |
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| Publication Number | Publication Date |
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| CN103321809A CN103321809A (en) | 2013-09-25 |
| CN103321809B true CN103321809B (en) | 2015-07-08 |
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| CN108051223B (en) * | 2017-09-30 | 2020-07-10 | 河北华北柴油机有限责任公司 | Engine low-pressure oil way monitoring system and monitoring method |
| CN108678881B (en) * | 2018-03-26 | 2020-06-26 | 潍柴动力股份有限公司 | Method and device for detecting reliability of oil injector |
| CN109209668B (en) * | 2018-09-28 | 2021-05-18 | 潍柴动力股份有限公司 | Oil injector clamping stagnation fault diagnosis method and device |
| CN111765009B (en) * | 2020-07-02 | 2022-09-16 | 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 |
| CN114673588B (en) * | 2022-03-09 | 2023-04-18 | 潍柴动力股份有限公司 | Method and device for judging engine operation fault |
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| DE102010025177A1 (en) * | 2010-06-25 | 2011-12-29 | Man Truck & Bus Ag | Method for recognizing leakage current at valve unit provided in region of common-rail fuel injection system of e.g. diesel engine of ship, involves increasing system pressure within fuel feeding unit in relation to basic system pressure |
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2013
- 2013-07-08 CN CN201310284559.7A patent/CN103321809B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5708202A (en) * | 1995-06-15 | 1998-01-13 | Mercedes-Benz Ag | Method of recognizing operating errors in a fuel injection system of an internal combustion engine |
| CN201532290U (en) * | 2009-11-20 | 2010-07-21 | 潍柴动力股份有限公司 | Detection device for checking tightness of common-rail fuel injectors and copper bushes |
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| CN103321809A (en) | 2013-09-25 |
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