CN103047125A - Oil pump feeding fault detecting method and device of high-pressure plunger-type fuel pump - Google Patents
Oil pump feeding fault detecting method and device of high-pressure plunger-type fuel pump Download PDFInfo
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- CN103047125A CN103047125A CN2012105329393A CN201210532939A CN103047125A CN 103047125 A CN103047125 A CN 103047125A CN 2012105329393 A CN2012105329393 A CN 2012105329393A CN 201210532939 A CN201210532939 A CN 201210532939A CN 103047125 A CN103047125 A CN 103047125A
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- 238000001514 detection method Methods 0.000 claims description 38
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000002826 coolant Substances 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 5
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Abstract
The invention discloses an oil pump feeding fault detecting method and device of a high-pressure plunger-type fuel pump. The oil pump feeding fault detecting method includes: obtaining rail pressure values of N crank signal gears of each oil supply period of in least one working cycle, wherein N is larger than or equal to 2 and smaller than or equal to the natural numbers of the crank signal gears corresponding to rail pressure boosting in an oil supply period; calculating the rail pressure boosting average value of each plunger according to the rail pressure values of the N crank signal gears of the oil supply period corresponding to each plunger; judging whether the rail pressure boosting average values of all the plungers are the same or close to each other, judging the oil pump to be normal when the rail pressure boosting values are the same or close to each other, and otherwise, judging fault exists in the oil pump. Therefore, by means of the oil pump feeding fault detecting method and device, fault of the plunger-type fuel pumps can be accurately detected, system maintenance efficiency is improved, and later development of the system can be guaranteed.
Description
Technical field
The present invention relates to mechanical field, particularly a kind of high-pressure plunger oil pump feed fault detection method and device.
Background technique
The most high pressure co-rail systems that adopt of motor are realized braking function, and at present, the cost of each parts is all very expensive in the high pressure co-rail system, in case fault has appearred in certain parts of high pressure co-rail system, will expend a large amount of one-tenth and originally keep in repair.So for whole high pressure co-rail system, it is very important that its faut detection just becomes.
Wherein, prior art discloses a kind of special fuel delivery for high pressure co-rail system and has detected, and the method for fuel delivery aspect fault whether occurs to determine high pressure co-rail system.Specifically: the fuel delivery that calculates first whole system, and then fuel delivery and the predefined fuel delivery threshold value that calculates compared, if greater than predefined fuel delivery threshold value, then there is the fault of fuel delivery aspect in illustrative system, otherwise there is not the fault of fuel feeding aspect in illustrative system.
But in realizing process of the present invention, the present inventor finds that there are the following problems at least in the prior art:
The fault detection method of prior art only can detect roughly high pressure co-rail system and fuel delivery aspect fault whether occur.Yet, the reason that causes the fuel delivery fault to produce has multiple, wherein, high-pressure plunger oil pump feed fault is exactly the one of the main reasons that produces the fuel delivery fault, high-pressure plunger oil pump feed fault also is a critical failure for whole system, also is vital for the detection of plunger oil pump feed fault in the high pressure co-rail system.Whether existing method can't judge this fuel delivery fault because high-pressure plunger oil pump imbalance problem causes, that is to say, existing method can't determine to cause the concrete reason place of this fuel delivery fault more subtly, the maintenance man can't determine specifically which position in the high pressure co-rail system is keeped in repair, and this maintenance and exploitation in product later stage to whole system is made troubles.
Summary of the invention
In order to address the above problem, the object of the invention is to provide a kind of high-pressure plunger oil pump feed fault detection method and device, can determine the unbalanced fault of high-pressure plunger oil pump.
The invention provides a kind of high-pressure plunger oil pump feed fault detection method, its process fault detection comprises:
Obtain the rail pressure value of N the crankshaft signal tooth in each fuel feeding cycle at least one work cycle, described N is for more than or equal to 2 and be less than or equal to a fuel feeding rise natural number of the corresponding crankshaft signal number of teeth of rail pressure in the cycle;
According to the rail pressure value of N the crankshaft signal tooth in the fuel feeding cycle corresponding with each plunger, calculate the rail pressure rising average of each plunger;
Whether the rail pressure rising average of judging all plungers is identical or close, if identical or close, judges that oil pump is normal, otherwise, judge that there is the fuel feeding fault in oil pump.
Preferably, before carrying out faut detection, described method also comprises: judge that whether plunger-type fuel pump is in the stable operation situation;
If so, carry out process fault detection, otherwise, process fault detection do not carried out.
Preferably, describedly judge that plunger-type fuel pump whether in the stable operation situation, comprising:
Gather the running parameter of motor, described running parameter comprises: any one in fuel injection quantity, crank teeth rotating speed, common rail pipe rail pressure and the engine coolant temperature or a plurality of arbitrarily;
In its normal range of operation separately, if in normal range of operation, then oil pump is in the stable operation situation to the running parameter of judging described collection, otherwise oil pump is not in the stable operation situation.
Preferably, the rail pressure value of N the crankshaft signal tooth in the fuel feeding cycle that described basis is corresponding with each plunger is calculated the rail pressure rising average of each plunger, comprising:
Calculate the difference between the maximum value and minimum value in the rail pressure value of N crankshaft signal tooth in each fuel feeding cycle, described difference is the rail pressure rising value in each fuel feeding cycle;
According to the corresponding relation of described fuel feeding cycle and plunger, from the rail pressure rising value in described each fuel feeding cycle, obtain the rail pressure rising average in the fuel feeding cycle corresponding with each plunger.
Preferably, describedly judge whether the rail pressure rising average of all plungers is close, comprising:
Calculate the ratio of the rail pressure rising average of per two plungers;
Judge described ratio whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
Preferably, describedly judge whether the rail pressure rising average of all plungers is close, comprising:
Calculate a mean value of the rail pressure rising average of all plungers;
Calculate successively the rail pressure rising average of each plunger and the ratio between the described mean value;
Judge described ratio whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
Preferably, after there is the fuel feeding fault in definite oil pump, also comprise:
Determine that the not identical also not close plunger of rail pressure rising average is the fault plunger.
The present invention also provides a kind of high-pressure plunger oil pump feed Fail detecting apparatus, comprising:
Acquisition module is used for obtaining the rail pressure value of N the crankshaft signal tooth in each fuel feeding cycle of at least one work cycle, and described N is for more than or equal to 2 and be less than or equal to a fuel feeding rise natural number of the crankshaft signal number of teeth of correspondence of rail pressure in the cycle;
Computing module is used for the rail pressure value according to N the crankshaft signal tooth in the fuel feeding cycle corresponding with each plunger, calculates the rail pressure rising average of each plunger;
The first judge module is used for judging whether the rail pressure rising average of all plungers is identical or close, if equal or close, judges that then oil pump is normal, otherwise, judge that there is the fuel feeding fault in oil pump.
Preferably, described device also comprises:
Judge enable module, be used for whether judging plunger-type fuel pump in the stable operation situation, if so, carry out process fault detection, otherwise, process fault detection do not carried out.
Preferably, described judgement enable module comprises:
Gather submodule, be used for gathering the running parameter of motor, described running parameter comprises: any one in fuel injection quantity, crank teeth rotating speed, common rail pipe rail pressure and the engine coolant temperature or a plurality of arbitrarily;
Decision sub-module, in its normal range of operation separately, if in normal range of operation, then oil pump is in the stable operation situation to the running parameter of judging described collection, otherwise oil pump is not in the stable operation situation.
Preferably, described computing module comprises:
The difference submodule be used for to calculate the rail pressure value maximum value of N crankshaft signal tooth in each fuel feeding cycle and the difference between the minimum value, and described difference is the rail pressure rising value in each fuel feeding cycle;
The average submodule is used for the corresponding relation according to described fuel feeding cycle and plunger, from the rail pressure rising value in described each fuel feeding cycle, obtains the rail pressure rising average in the fuel feeding cycle corresponding with each plunger.
Preferably, described the first judge module comprises:
Ratio submodule one is for the ratio of the rail pressure rising average of calculating per two plungers;
Judge submodule one, be used for judging described ratio whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
Preferably, described the first judge module comprises:
Average submodule one is for a mean value of the rail pressure rising average of calculating all plungers;
Ratio submodule two is used for calculating successively the rail pressure rising average of each plunger and the ratio between the described mean value;
Judge submodule two, be used for judging described ratio whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
Preferably, described device also comprises: determination module is used for determining that the not identical also not close plunger of rail pressure rising average is the fault plunger.
As can be seen from the above-described embodiment, a kind of high-pressure plunger oil pump feed fault detection method and the device of providing disclosed by the invention obtains the rail pressure value of the crankshaft signal tooth in each fuel feeding cycle at least one work cycle; According to the rail pressure value of the crankshaft signal tooth in the fuel feeding cycle corresponding with each plunger, calculate the rail pressure rising average of each plunger; Whether the rail pressure rising average of judging all plungers is identical or close, thereby can determine the unbalanced fault of high-pressure plunger oil pump, for the maintenance of system and later stage development offer convenience.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technological scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of high-pressure plunger oil pump feed fault detection method flow chart that the embodiment of the invention one discloses;
Fig. 2 is the another kind of high-pressure plunger oil pump feed fault detection method flow chart that the embodiment of the invention two discloses;
Fig. 3 is the another kind of high-pressure plunger oil pump feed fault detection method flow chart that the embodiment of the invention three discloses;
Fig. 4 is the structural representation of a kind of high-pressure plunger oil pump feed Fail detecting apparatus of the embodiment of the invention four announcements;
Fig. 5 is the structural representation of the another kind of high-pressure plunger oil pump feed Fail detecting apparatus that discloses of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the embodiment of the invention is described in detail.
Embodiment one
See also Fig. 1, it is a kind of high-pressure plunger oil pump feed fault detection method flow chart that the embodiment of the invention one discloses, and may further comprise the steps:
Step 101: obtain the rail pressure value of N the crankshaft signal tooth in each fuel feeding cycle at least one work cycle, described N is for more than or equal to 2 and be less than or equal to a fuel feeding rise natural number of the corresponding crankshaft signal number of teeth of rail pressure in the cycle;
Step 102: according to the rail pressure value of N the crankshaft signal tooth in the fuel feeding cycle corresponding with each plunger, calculate the rail pressure rising average of each plunger;
Step 103: whether the rail pressure rising average of judging all plungers is identical or close;
Step 104: if equal or close, judge that oil pump is normal;
Step 105: otherwise, judge that there is the fuel feeding fault in oil pump.
Described step 102 comprises: calculate the difference between the maximum value and minimum value in the rail pressure value of N crankshaft signal tooth in each fuel feeding cycle, described difference is the rail pressure rising value in each fuel feeding cycle;
According to the corresponding relation of described fuel feeding cycle and plunger, from the rail pressure rising value in described each fuel feeding cycle, obtain the rail pressure rising average in the fuel feeding cycle corresponding with each plunger.
Described step 103 comprises: the ratio that calculates the rail pressure rising average of per two plungers;
Judge described ratio whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
Can find out by embodiment one, method provided by the invention can be determined the high-pressure plunger oil pump and whether have fault, for maintenance and the later development of whole high pressure co-rail system offers convenience.
In order in more detail the present invention to be set forth, the below carries out Check processing for concrete high pressure co-rail system, transmitter is four-stroke 6 Cylinder engines in the described system, a work cycle comprises 6 fuel feeding cycles and 6 injection periods, the high-pressure plunger oil pump is the double-plunger oil pump, concrete grammar another kind of high-pressure plunger oil pump feed fault detection method as shown in Figure 2 comprises the steps:
Step 201: the rail pressure value of obtaining 5 crankshaft signal teeth in each fuel feeding cycle in the work cycle;
Step 202: according to the rail pressure value of 5 crankshaft signal teeth in the fuel feeding cycle corresponding with each plunger, calculate the rail pressure rising average of each plunger;
Described step 202 comprises: calculate the difference between the maximum value and minimum value in the rail pressure value of 5 crankshaft signal teeth in each fuel feeding cycle, described difference is the rail pressure rising value in each fuel feeding cycle;
There are 6 fuel feeding cycles an operation cycle, then calculate the difference between the maximum value and minimum value in the rail pressure value of 5 crankshaft signal teeth in each fuel feeding cycle of calculating in each fuel feeding cycle, then calculating three odd number fuel feeding Periodic Orbits presses to appreciate and is respectively 0.036*106hPa, 0.036*106hPa, 0.037*106hPa, obtain three even cycle rail pressure rising values and be respectively 0.035*106hPa, 0.034*106hPa, 0.035*106hPa.
According to the corresponding relation of described fuel feeding cycle and plunger, from the rail pressure rising value in described each fuel feeding cycle, obtain the rail pressure rising average in the fuel feeding cycle corresponding with each plunger.
According to corresponding first plunger of odd cycle, corresponding second plunger of even cycle, then utilizing the rail pressure rising value calculating odd number rail pressure rising average of above-mentioned three odd cycle is the rail pressure rising average of described the first plunger for 0.0363*106hPa; Utilize above-mentioned three even cycle rail pressure rising values to calculate even number rail pressure rising average and be 0.0347*106hPa, be i.e. the rail pressure rising value of second plunger.
Step 203: whether the rail pressure rising average of judging two plungers is identical or close;
Step 204: if identical or close, judge that oil pump is normal;
Step 205: otherwise, judge that there is the fuel feeding fault in oil pump.
Specifically comprise: the ratio that calculates the rail pressure rising average of two plungers; Judge that described ratio is whether all in default error burst scope; If all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.Be specially: then calculate the ratio of the rail pressure rising average of the rail pressure rising average of the first plunger and the second plunger, namely to obtain ratio be 1.048 to 0.0363*106hPa/0.0347*106hPa.If default error burst scope is 0.8-1.2, then this plunger pump fault-free.If result of calculation exceed this scope then oil pump have the fuel feeding fault.
The detecting method that provides in the present embodiment is for concrete system, the crankshaft signal tooth in the operation cycle of adopting and each fuel feeding cycle of collection is to set according to actual detection case, and for different systems, different motors and the situation of a plurality of plunger-type fuel pumps, can set according to detecting actual conditions, not do strict restriction at this.
When for system when comprising the detection of 3 plunger-type fuel pumps, method provided by the invention method flow diagram as shown in Figure 3 may further comprise the steps:
Step 301: obtain the rail pressure value of N the crankshaft signal tooth in each fuel feeding cycle at least one work cycle, described N is for more than or equal to 2 and be less than or equal to a fuel feeding rise natural number of the corresponding crankshaft signal number of teeth of rail pressure in the cycle;
Be specially: obtain 2 work cycle, totally 12 fuel feeding cycles, the rail pressure value of 10 crankshaft signal teeth in each fuel feeding cycle.
Step 302: according to the rail pressure value of N the crankshaft signal tooth in the fuel feeding cycle corresponding with three plungers, calculate the rail pressure rising average of each plunger;
Be specially: calculate the difference between the maximum value and minimum value in the rail pressure value of 10 crankshaft signal teeth in each fuel feeding cycle, described difference is the rail pressure rising value in each fuel feeding cycle;
According to the corresponding relation of described fuel feeding cycle and plunger, that is, 1 and 4,2 and 5,3 and 6, respectively corresponding the 1st, 2,3 plungers from the rail pressure rising value in described 12 fuel feeding cycles, obtain the rail pressure rising average in the fuel feeding cycle corresponding with each plunger.Namely, the rail pressure rising value of the 1st plunger, the average A1 of the rail pressure rising value in the 1st and 4 fuel feeding cycle, the rail pressure rising value of the 2nd plunger, the average A2 of the rail pressure rising value in the 2nd and 5 fuel feeding cycle, the rail pressure rising value of the 3rd plunger is the average A3 of the rail pressure rising value in the 3rd and 6 fuel feeding cycle.
Step 303: whether the rail pressure rising average of judging three plungers is identical or close;
Step 304: if close, judge that oil pump is normal;
Step 305: otherwise, judge that there is the fuel feeding fault in oil pump.
Be specially: judge successively A1, A2, A3, ratio between any two, if ratio all in predetermined margin of error, oil pump fault-free then, otherwise there is the fuel feeding fault in this oil pump.
Also can be specially: calculate A1, A2, A3 three's average A, then calculate respectively A1/A, A2/A, three ratios of A3/A judge that at last these three ratios are whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
Certainly, no matter as long as adopt any computational methods can contrast the disequilibrium of the rail pressure rising average of three plungers, just can judge oil pump and whether have fault.
Also comprising before the above-mentioned faut detection: judge whether plunger-type fuel pump exists in the stable operation situation, if so, carry out process fault detection, otherwise, do not carry out process fault detection.
Be specially: gather the running parameter of motor, described running parameter comprises: any one in fuel injection quantity, crank teeth rotating speed, common rail pipe rail pressure and the engine coolant temperature or a plurality of arbitrarily;
In its normal range of operation separately, if in normal range of operation, then oil pump is in the stable operation situation to the running parameter of judging described collection, otherwise oil pump is not in the stable operation situation.
Other parameters in can certainly the judgement system are in the nominal situation as long as the system that can detect is current, then just carry out process fault detection, otherwise do not carry out.
Above-mentioned faut detection determines that oil pump exists after the fuel feeding fault, can be further, determine that the not identical also not close plunger of rail pressure rising average is the fault plunger.Be specially: in the error burst scope that the A1/A that detects in above-described embodiment three is not presetting, A2/A and A3/A in default error burst scope, can determine that then there is the fuel feeding fault in the first plunger.
For the detection of multiplunger high pressure co-rail system, can gather the rail pressure value of the song wheel signal teeth that meets testing requirement according to the actual number of plungers of system and fuel feeding cycle corresponding relation, judge processing.
As seen, embodiment of the invention high-pressure plunger oil pump feed fault detection method, take turns the rail pressure of signal teeth by the song that obtains each cycle, obtain the rail pressure rising value in each cycle, then can judge the rail pressure rising average of each plunger, and then can judge the balance between the plunger, determine oil pump and whether have fault, can determine accurately that plunger and have fault, so that the staff keeps in repair targetedly or the operation such as later development.
Embodiment four
The present invention also provides a kind of high-pressure plunger oil pump feed Fail detecting apparatus.Structural representation shown in figure four specifically comprises: acquisition module 401, computing module 402 and the first judge module 403,
Can specifically comprise: difference submodule 402A, be used for to calculate the rail pressure value maximum value of N crankshaft signal tooth in each fuel feeding cycle and the difference between the minimum value, described difference is the rail pressure rising value in each fuel feeding cycle;
Average submodule 402B is used for the corresponding relation according to described fuel feeding cycle and plunger, from the rail pressure rising value in described each fuel feeding cycle, obtains the rail pressure rising average in the fuel feeding cycle corresponding with each plunger.
The first judge module 403 is used for judging whether the rail pressure rising average of all plungers is identical or close, if equal or close, judges that then oil pump is normal, otherwise, judge that there is the fuel feeding fault in oil pump.
Can specifically comprise: ratio submodule one, for the ratio of the rail pressure rising average of calculating per two plungers; Judge submodule one, be used for judging described ratio whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
Can also specifically comprise: average submodule one, for a mean value of the rail pressure rising average of calculating all plungers;
Ratio submodule two is used for calculating successively the rail pressure rising average of each plunger and the ratio between the described mean value;
Judge submodule two, be used for judging described ratio whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
The position that exists in order further to determine fault, described device can further include: determination module is used for determining that the not identical also not close plunger of rail pressure rising average is the fault plunger.
Under being in steady-working state in system, carry out Check processing so that testing result is more reliable, described device can further include: judge enable module 501, be used for judging that whether plunger-type fuel pump is in the stable operation situation, if, carry out process fault detection, otherwise, process fault detection do not carried out.
Judge enable module 501, comprising: gather submodule 501A, be used for gathering the running parameter of motor, described running parameter comprises: any one in fuel injection quantity, crank teeth rotating speed, common rail pipe rail pressure and the engine coolant temperature or a plurality of arbitrarily; Decision sub-module 501B, in its normal range of operation separately, if in normal range of operation, then oil pump is in the stable operation situation to the running parameter of judging described collection, otherwise oil pump is not in the stable operation situation.
Then other modules of described device are in the stable operation situation at oil pump, begin to carry out Check processing.Specifically as shown in Figure 5.
The device that the embodiment of the invention provides, the rail pressure of the song wheel signal teeth in each cycle that utilization is obtained, process the fuel feeding disequilibrium that detects between each plunger, judge whether oil pump feed exists fault, the present invention can detect the system that adopts arbitrarily the high-pressure common rail plunger oil pump, has stronger transplantability adaptability, the guilty culprit of the system that determines plunger-type fuel pump that can be accurate and visual, avoided common group of personnel's workload, improved maintenance efficiency, simultaneously the later development of system also offered convenience.
Above a kind of high-pressure plunger oil pump feed fault detection method provided by the present invention and device are described in detail, used specific embodiment herein principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (14)
1. a high-pressure plunger oil pump feed fault detection method is characterized in that, process fault detection comprises:
Obtain the rail pressure value of N the crankshaft signal tooth in each fuel feeding cycle at least one work cycle, described N is for more than or equal to 2 and be less than or equal to a fuel feeding rise natural number of the corresponding crankshaft signal number of teeth of rail pressure in the cycle;
According to the rail pressure value of N the crankshaft signal tooth in the fuel feeding cycle corresponding with each plunger, calculate the rail pressure rising average of each plunger;
Whether the rail pressure rising average of judging all plungers is identical or close, if identical or close, judges that oil pump is normal, otherwise, judge that there is the fuel feeding fault in oil pump.
2. method according to claim 1 is characterized in that, before carrying out faut detection, described method also comprises: judge that whether plunger-type fuel pump is in the stable operation situation;
If so, carry out process fault detection, otherwise, process fault detection do not carried out.
3. method according to claim 2 is characterized in that, describedly judges that plunger-type fuel pump whether in the stable operation situation, comprising:
Gather the running parameter of motor, described running parameter comprises: any one in fuel injection quantity, crank teeth rotating speed, common rail pipe rail pressure and the engine coolant temperature or a plurality of arbitrarily;
In its normal range of operation separately, if in normal range of operation, then oil pump is in the stable operation situation to the running parameter of judging described collection, otherwise oil pump is not in the stable operation situation.
4. method according to claim 1 is characterized in that, the rail pressure value of N the crankshaft signal tooth in the fuel feeding cycle that described basis is corresponding with each plunger is calculated the rail pressure rising average of each plunger, comprising:
Calculate the difference between the maximum value and minimum value in the rail pressure value of N crankshaft signal tooth in each fuel feeding cycle, described difference is the rail pressure rising value in each fuel feeding cycle;
According to the corresponding relation of described fuel feeding cycle and plunger, from the rail pressure rising value in described each fuel feeding cycle, obtain the rail pressure rising average in the fuel feeding cycle corresponding with each plunger.
5. method according to claim 1 is characterized in that, describedly judges whether the rail pressure rising average of all plungers is close, comprising:
Calculate the ratio of the rail pressure rising average of per two plungers;
Judge described ratio whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
6. method according to claim 1 is characterized in that, describedly judges whether the rail pressure rising average of all plungers is close, comprising:
Calculate a mean value of the rail pressure rising average of all plungers;
Calculate successively the rail pressure rising average of each plunger and the ratio between the described mean value;
Judge described ratio whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
7. method according to claim 1 is characterized in that, after there is the fuel feeding fault in definite oil pump, also comprises:
Determine that the not identical also not close plunger of rail pressure rising average is the fault plunger.
8. a high-pressure plunger oil pump feed Fail detecting apparatus is characterized in that, comprising:
Acquisition module is used for obtaining the rail pressure value of N the crankshaft signal tooth in each fuel feeding cycle of at least one work cycle, and described N is for more than or equal to 2 and be less than or equal to a fuel feeding rise natural number of the crankshaft signal number of teeth of correspondence of rail pressure in the cycle;
Computing module is used for the rail pressure value according to N the crankshaft signal tooth in the fuel feeding cycle corresponding with each plunger, calculates the rail pressure rising average of each plunger;
The first judge module is used for judging whether the rail pressure rising average of all plungers is identical or close, if equal or close, judges that then oil pump is normal, otherwise, judge that there is the fuel feeding fault in oil pump.
9. device according to claim 8 is characterized in that, described device also comprises:
Judge enable module, be used for whether judging plunger-type fuel pump in the stable operation situation, if so, carry out process fault detection, otherwise, process fault detection do not carried out.
10. device according to claim 9 is characterized in that, described judgement enable module comprises:
Gather submodule, be used for gathering the running parameter of motor, described running parameter comprises: any one in fuel injection quantity, crank teeth rotating speed, common rail pipe rail pressure and the engine coolant temperature or a plurality of arbitrarily;
Decision sub-module, in its normal range of operation separately, if in normal range of operation, then oil pump is in the stable operation situation to the running parameter of judging described collection, otherwise oil pump is not in the stable operation situation.
11. device according to claim 8 is characterized in that, described computing module comprises:
The difference submodule be used for to calculate the rail pressure value maximum value of N crankshaft signal tooth in each fuel feeding cycle and the difference between the minimum value, and described difference is the rail pressure rising value in each fuel feeding cycle;
The average submodule is used for the corresponding relation according to described fuel feeding cycle and plunger, from the rail pressure rising value in described each fuel feeding cycle, obtains the rail pressure rising average in the fuel feeding cycle corresponding with each plunger.
12. device according to claim 8 is characterized in that, described the first judge module comprises:
Ratio submodule one is for the ratio of the rail pressure rising average of calculating per two plungers;
Judge submodule one, be used for judging described ratio whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
13. device according to claim 8 is characterized in that, described the first judge module comprises:
Average submodule one is for a mean value of the rail pressure rising average of calculating all plungers;
Ratio submodule two is used for calculating successively the rail pressure rising average of each plunger and the ratio between the described mean value;
Judge submodule two, be used for judging described ratio whether all in default error burst scope, if all exist, oil pump fault-free then, otherwise there is the fuel feeding fault in oil pump.
14. device according to claim 8 is characterized in that, also comprises:
Determination module is used for determining that the not identical also not close plunger of rail pressure rising average is the fault plunger.
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| CN201210532939.3A CN103047125B (en) | 2012-12-11 | 2012-12-11 | Oil pump feeding fault detecting method and device of high-pressure plunger-type fuel pump |
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| CN201210532939.3A CN103047125B (en) | 2012-12-11 | 2012-12-11 | Oil pump feeding fault detecting method and device of high-pressure plunger-type fuel pump |
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| CN103047125B CN103047125B (en) | 2015-07-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN109695564A (en) * | 2017-10-20 | 2019-04-30 | 郑州宇通客车股份有限公司 | A kind of fault detection method and system of electric compressor |
| CN111980820A (en) * | 2019-05-22 | 2020-11-24 | 罗伯特·博世有限公司 | Method and control unit for predicting a return spring failure of a piston in a motor vehicle |
| CN114592984A (en) * | 2022-03-14 | 2022-06-07 | 潍柴动力股份有限公司 | Rail pressure sensor calibration method, device and equipment |
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| CN109695564B (en) * | 2017-10-20 | 2020-09-01 | 郑州宇通客车股份有限公司 | Fault detection method and system for electric air compressor |
| CN111980820A (en) * | 2019-05-22 | 2020-11-24 | 罗伯特·博世有限公司 | Method and control unit for predicting a return spring failure of a piston in a motor vehicle |
| CN114592984A (en) * | 2022-03-14 | 2022-06-07 | 潍柴动力股份有限公司 | Rail pressure sensor calibration method, device and equipment |
| CN114592984B (en) * | 2022-03-14 | 2023-08-18 | 潍柴动力股份有限公司 | Rail pressure sensor verification method, device and equipment |
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