CN1654802A - Injection system monitoring method for internal combustion engine - Google Patents
Injection system monitoring method for internal combustion engine Download PDFInfo
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- CN1654802A CN1654802A CNA2004100757412A CN200410075741A CN1654802A CN 1654802 A CN1654802 A CN 1654802A CN A2004100757412 A CNA2004100757412 A CN A2004100757412A CN 200410075741 A CN200410075741 A CN 200410075741A CN 1654802 A CN1654802 A CN 1654802A
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000002347 injection Methods 0.000 title claims abstract description 42
- 239000007924 injection Substances 0.000 title claims abstract description 42
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 24
- 238000012544 monitoring process Methods 0.000 title abstract 2
- 239000000446 fuel Substances 0.000 claims abstract description 76
- 239000000295 fuel oil Substances 0.000 claims abstract description 59
- 230000002950 deficient Effects 0.000 claims abstract description 30
- 230000001105 regulatory effect Effects 0.000 claims description 43
- 238000004590 computer program Methods 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 3
- 230000036962 time dependent Effects 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 2
- 230000033228 biological regulation Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2438—Active learning methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2441—Methods of calibrating or learning characterised by the learning conditions
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Fuel-Injection Apparatus (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The present invention relates to a method for monitoring a fuel injection system of an internal combustion engine, wherein, the fuel injection system is provided with a fuel oil storing device and a dominated measuring unit used for controlling amount of fuel oil entering the fuel oil storing device.The known process of the type analyzes a signal representing pressure in the fuel oil storing device in a likely defective respect in the fuel injection system and varying with time. In order to purposely draw the conclusion that defects exist in the measuring unit (160), the present invention proposes that the measuring unit is gradually switched on or off during the period of analyzing the signal representing pressure in the fuel oil storing device.
Description
Technical field
The present invention relates to a kind of be used to monitor an injection system of an internal-combustion engine, particularly go the same way method and a computer program and a control gear of injection system.In addition, the invention still further relates to data medium with a kind of like this computer program.
Background technique
From background technique, particularly known basically a kind of like this method from the described background technique of disclosed specification DE 101 03 867 A1 of Germany, this method relates to a kind of injection system that is used for an internal-combustion engine, wherein this injection system has a regulating loop, is used for being adjusted in via a pressure regulator valve pressure of a fuel oil storage; And have a controlled batching unit, be used to control the fuel supply volume that enters the fuel oil storage.
The fuel oil that is provided by described batching unit is contracted by a pump pressure.In disclosed specification method regulation as can be known, gather a force value that characterizes the fuel pressure in the fuel oil storage, and particularly after filtering, compare with a threshold value.Then, if the force value of being gathered, particularly force value and the described threshold value after filtering have deviation, so just be identified in a defective in the parts of injection system.
But the shortcoming of the method for this description is, even if when defective that identifies basically in the injection system, still batching unit particularly can not be defined as the defective parts in the injection system.
Summary of the invention
Therefore from described background technique, task of the present invention is to provide a kind of method and computer program and a kind of control apparatus that is used to implement this method that is used to monitor an injection system of an internal-combustion engine, and this control apparatus can be accurately be identified as the source of trouble with the batching unit of injection system.
This task solves by the method for asking for protection in claim 1.The method is characterized in that during analytic signal, batching unit is closed gradually or opened gradually.
Advantage of the present invention:
During this analysiss, so control batching unit simultaneously according to method of the present invention, that analyze for the signal of time dependent pressure of representative in the fuel oil storage, make this batching unit be closed gradually or be opened gradually in time, its reason is as follows: describedly close or open batching unit and can have influence on pressure in the fuel oil storage particularly, and therefore have influence on analyzed signal.Therefore in the method, the signal of representative pressure also can fully targetedly analyze the defective that perhaps exists in batching unit.
Advantageously signal is analyzed, so that try to achieve the moment that at least one is determined, this moment is characterised in that, when this moment, both can obtain simultaneously the fuel delivery of a reality-be that batching unit is actually the fuel delivery that the fuel oil storage provides constantly at this, and can obtain a rated fuel delivery-be that batching unit should be the fuel delivery by standard fabrication that the fuel oil storage provides constantly at this again.
Method of the present invention is advantageously stipulated, if the deviation between rated fuel delivery of obtaining and the actual fuel delivery obtained during greater than the tolerance range of a permission given in advance, then can draw defective conclusion on as the batching unit of parts of injection system.
Preferably improve the reliability that has the judgement of defective on batching unit particularly greatly by following measure, the comparison of promptly described rating value and actual value is being carried out during in the different moment under the situation of a plurality of rotating speeds of having adjusted consistently respectively.
For the signal of representing the pressure in the fuel oil storage, advantageously there is the scheme of alternative selective.The first: if a regulating loop that is used for regulating via pressure regulator valve the pressure of fuel oil storage works, the control signal that then can adopt pressure regulator valve is as this signal.Scheme as an alternative, an output signal of directly gathering the pressure transducer of the variation in pressure in the fuel oil storage also can be used as described signal or analyzed.
If this signal is not to change linearly basically at least in the process that opens or closes batching unit linearly yet, then might reasons out in parts of injection system and have defective, but not be targetedly to reason out batching unit to have defective.
In addition, above-mentioned task of the present invention also solves by control apparatus and data medium with described computer program that a computer program and are used to implement described method.The advantage of these technological schemes is basically corresponding to the above described advantage of the method for asking for protection that relates to.
Advantageously this control apparatus so designs in addition: the actual characteristic curve that generates the batching unit that is used in fact adopting from described the method according to this invention by means of the result who draws.For this reason, require a learning functionality is integrated in this control apparatus.In principle, be enough to generate the characteristic curve of described reality for a disposable enforcement of the method according to this invention.But advantageously this method repeats momently, particularly is implemented when idle running, so that in case of necessity this characteristic curve is revised again.Advantageously described in addition control apparatus so designs: control the described batching unit that in fact adopts by standard by the characteristic curve of the reality of generation in the future.Can make control accuracy, the quantitative of fuel supply volume of batching unit also therefore can make the work of internal-combustion engine become greatly accurate in view of the above.
Description of drawings
This specification is with six width of cloth accompanying drawings, and accompanying drawing illustrates:
Structure of Fig. 1 according to injection system of the present invention,
The change curve of the signal that is varied to inverse ratio of its variation of Fig. 2 and the pressure in the fuel oil storage, this signal is equivalent to be used for the control signal of a batching unit when implementing the method according to this invention,
The change curve of Fig. 3 flow of the fuel oil by described batching unit when implementing the method according to this invention,
The control signal of Fig. 4 pressure regulator valve that is conditioned when implementing the method according to this invention,
Fig. 5 passes through the flow of the fuel oil of a pressure regulator valve when implementing the method according to this invention,
One of Fig. 6 is used for the I/Q characteristic curve of a batching unit that in fact adopts.
Embodiment
Below by accompanying drawing form detailed description the present invention with different embodiments.
Fig. 1 shows of an internal-combustion engine (not shown) according to injection system 100 of the present invention.This injection system is the so-called injection system of going the same way particularly.This injection system of going the same way has a fuel oil storage 110 that under high pressure stores fuel oil in it, so as to sparger, be that the injection valve 180 of internal-combustion engine provides fuel oil.This fuel oil storage 110 is provided with fuel oil in its low voltage side from a tank for gaseous or liquid substances 200.Be provided with the fuel pump 150 of an electricity, this fuel pump flows to a batching unit 160 from tank for gaseous or liquid substances 200 suction fuel oils and with it for this reason.This batching unit 160 high-pressure service pump 170 for a postposition under the situation of a control signal S1 of a controller 140 of response provides quantitative amount of fuel.These high pressure fuel pump 170 compressions flow to its fuel oil and this fuel oil are transported to fuel oil storage 110 with a desirable pressure from batching unit 160.Be provided with one by a pressure transducer 120, controller 140 and the regulating loop that pressure regulator valve 130 is formed in the high pressure side of this fuel oil storage 110, be used for regulating the pressure of fuel oil storage.Pressure transducer 120 is gathered the actual actual pressure in the fuel oil storagies 110 and with the form of a measurement signal P this actual pressure is given to controller 140.Described actual pressure compares with a rated pressure given in advance in this controller, forms a pressure-adjusting deviation, and represents the regulated signal S2 of this pressure of obtaining-adjusting deviation to output to pressure regulator valve 130 with one.Utilize this pressure regulator valve 130 of described regulated signal S2 so to control, make described adjusting deviation change to zero as far as possible.
Usually, pressure transducer 120, controller 140, batching unit 160, high-pressure service pump 170 and fuel oil storage 110 form the another kind of regulating loop that is used for regulating the pressure of fuel oil storage, but are not must be so for the present invention.Pressure described when quoting first regulating loop just now, that generate in controller 140 is regulated deviation and also is used as the adjusting deviation that is used for this other regulating loop.This is regulated under the situation of deviation in response, 160 of described batching unit are so controlled via control signal S1, make this batching unit 160 provide such amount of fuel for high pressure fuel pump 170: this amount of fuel is suitable for making this high pressure fuel pump 170 that fuel oil is compressed to such pressure, and this pressure is suitable for changing to zero regulating deviation.
High pressure fuel pump 170 is also controlled by a signal S3 by controller 140 in principle.Be used for when carrying out rating value-actual value comparison determining that the rated pressure specified value of regulating deviation preferably always determines according to a certain rotational speed N of internal-combustion engine, and be stored in the controller.
Describe the method according to this invention in detail below with reference to the structure of described injection system just now and with reference to accompanying drawing 2 to 6.
The purpose of this method is that parts accurately detect the possible defective of parts of injection system 100 as far as possible.Each parts of this injection system are abovely to quote the parts that Fig. 1 is mentioned, have reference character 110 to 170.
Following described two embodiments of the present invention can show particularly whether batching unit 160 works defectively.Unless there is great defective in injection system, these defectives no longer allow the internal-combustion engine normal operation and therefore are easy to discern.
Make internal combustion engine when for this reason, one first embodiment of the present invention is defined in a constant regulation rotational speed N; Simultaneously, the regulating loop that is used for regulating the pressure of fuel oil storage 110 at reference Fig. 1 described first is operated via pressure regulator valve 130.In order to have defective or defect in the state that can determine batching unit 160, these batching unit 160 controlled devices 140 are so controlled with control signal S1, and batching unit 160 is closed gradually from the state of opening a fully basically passing in time.Control signal S1 is the signal of a pulse duration modulation typically; The indication that batching unit 160 is closed is gradually then so carried out, and promptly As time goes on the fill factor TV of this signal is increased gradually; Figure 2 illustrates this point.
Shown in Figure 3 is, flow Q is changing by batching unit 160 in the variation shown in Fig. 2 based on fill factor how.Not only all set out thus in Fig. 2 but also in Fig. 3 to 5: batching unit 160 is opened when time point t=0 fully.According to Fig. 3, that batching unit 160 o'clock carries out in t＞0 and closing gradually this without any change shown in Fig. 2: flow Q by batching unit 160 until time point t
1Keep constant.Its reason is, at the time lag 0≤t≤t
1Therebetween, fuel pump 170 can not reduce the flow of the maximum possible of batching unit 160 when the rotating speed of adjusting based on its how much delivered volume.In other words: irrelevant with its open degree, only be that so many fuel oil can flow through batching unit 160, also as amount of fuel that can be removed at the outlet side of fuel pump 170.This discharge capacity is at the time lag 0≤t≤t
1The amount of being limited to Q during this time
z
According to the first embodiment of the present invention, wherein be used for as described working, by the analysis of regulated signal S2 being obtained this time point t via first regulating loop that pressure regulator valve 130 is regulated pressure
1This regulated signal S2 that is used for pilot pressure modulating valve 130 represents the variation of the pressure in the fuel oil storage 110 in the adjusting work of first regulating loop.As having mentioned when describing Fig. 3, this pressure is at the time lag 0≤t≤t
1Be substantial constant during this time, because the amount of fuel Q that carries from batching unit 160
zBe constant.Described first regulating loop then is used to be stabilized in the disturbance that does not add further discussion here at the most.Therefore, the described control signal S2 that figure 4 illustrates its fill factor is a substantial constant during this time lag.Only at time t＞t
1The time amount of fuel that provides by batching unit 160 become lentamente and be less than the amount of fuel that is consumed by internal-combustion engine and add leakage rate by sparger and pressure regulator valve, pressure in the fuel oil storage 110 just can descend so, if this pressure decline is not by this first regulating loop and is particularly compensated by one of pressure regulator valve 130 suitable control meeting.The compensation of the beginning that this pressure is descended by described first regulating loop is can be in Fig. 4 in sight with the bending form of the curve of the fill factor TV of regulated signal S2.The time point t of its effect was below once described
1Be equivalent in Fig. 4, occur when the time comes the time point of bending; In view of the above, can from Fig. 4 and therefore, can from regulated signal S2, obtain this time point t clearly
1
At time point t=t
1The time, by controlled then open degree of batching unit 160 flow Q that cause, that pass through batching unit
zBe equal to the amount of fuel of under the situation of considering possible loss, discharging by sparger.
At time point t
1The time can obtain actual fuel delivery V simply
Actual, promptly batching unit 160 is in fact at described very first time point t
1The time fuel delivery that provides for the fuel oil storage.This actual fuel delivery V
ActualThen be equivalent to the fuel delivery of high pressure fuel pump 170 at this time point.
Can multiply by the known fuel delivery of high pressure fuel pump revolution and multiply by the described fuel delivery that efficient calculates this high pressure fuel pump 170 by the rotating speed (the constant rotational speed N given in advance of this rotating speed and internal-combustion engine is a known fixing ratio) of high pressure fuel pump.
For the defective that detects in fact the batching unit 160 that adopts or with standard feature fault characteristic devious, the suggestion according to the present invention, with batching unit 160 just calculated, it is congruent to high-pressure service pump 170 at time point t
1The actual fuel delivery of fuel delivery and the rated fuel delivery when standard state of batching unit compare.If exceed predetermined, as a to allow tolerance range in this deviation between actual fuel delivery and rated fuel delivery of obtaining in relatively, then can from then on set out, the batching unit 160 that is promptly adopted demonstrates defective characteristic and obviously is defective.This defective for example may be that the processing of each member of described batching unit is accurate inadequately.
Can be about the judgement that in batching unit 160, has defective by the following measure insurance more that become, i.e. this judgement not only is subjected to the result of a comparison, and is subjected to the result's of a plurality of comparisons that fuel delivery is carried out support.These different more mutual differences are that these relatively are to carry out under different working state internal-combustion engine or injection system 100.
Introduce the different possibility that is used to adjust different, suitable operation point below.
One the second embodiment's regulation that is used for the method according to this invention is not only at time point t
1, and at an other time point t
2The control signal S2 that is used for pressure regulator valve 130 is analyzed.As can be seen from Figure 4, time point t
2Be positioned at time point t
1Afterwards.Particularly in blanking time, promptly at time lag t
1≤ t≤t
2During this time, batching unit 160 is closed gradually.Along with closing gradually of batching unit, the amount of fuel that provides for high-pressure service pump 170 and fuel oil storage 110 is reduced gradually, this can descend with the pressure basically in the fuel oil storage, if this pressure decline can not go into describedly to be adjusted or to be compensated by first regulating loop like that as previously mentioned.Exactly, descend, require pressure regulator valve 130 under the situation of its regulated signal of response S2, to be closed gradually, so that reduce gradually from fuel oil storage 110 via the fuel oil discharge capacity of pressure regulator valve 130 to tank for gaseous or liquid substances 200 in order to compensate this pressure.In order to realize this triggering to pressure regulator valve 130, the fill factor of regulated signal S2 shown in Figure 4 is at time lag t
1≤ t≤t
2Increased gradually during this time.
But certain the time arrive a point, at that point, first regulating loop and particularly pressure regulator valve 130 no longer can continue to compensate based on the pressure loss that fuel supply volume occurred, in the fuel oil storage 110 that continues to reduce.Fuel flow Q by pressure regulator valve 130
bThen interrupt fully, as shown in Figure 5.The time point t that this time point is equivalent to once mention
2From regulated signal S2, detect this time point t by following measure usually
2: it has reached one by fill factor TV shown in Figure 4 and has gone up saturation limit.This time point t
2Be suitable for obtaining the actual fuel delivery of batching unit 160 when this time point equally.This actual fuel delivery then be equivalent to internal-combustion engine when the rotational speed N of adjusting in advance, advantageously considering because under the situation of the leakage of the sparger 180 of injection system and the fuel oil loss that controlled quentity controlled variable is caused, known fuel consume.
To at time point t
2Rated fuel delivery V
SpecifiedCalculating with at time point t
1The time the compute classes of rated fuel delivery seemingly carry out.At time point t
2In time, only be noted that, in this case, the electric current of control signal S1 that is used to control batching unit 160 is much larger than at time point t
1The time electric current because at time point t
2The time control signal S1 shown in Figure 2 fill factor greatly increase.
The scheme that another kind is used to adjust other suitable operation point is, implements according to the described first and/or second described method of embodiment, not only is used to the rotational speed N of mentioning but also is used for a plurality of as far as possible other rotating speeds.The time point t that is determined for the rotating speed that can be similarly other
1And/or t
2, as previously mentioned, then producing the fuel delivery that other carrying out compared mutually, it relatively or confirm the result of a comparison of carrying out in the past or causes the suspection to this result.
Not necessarily leave no choice but derive time point t from the regulated signal S2 that is used for pilot pressure modulating valve 130
1And/or t
2On the contrary, also alternately from the output signal/measurement signal P of pressure transducer 120 be one respectively the rotating speed of constant adjustment obtain described time point t
1And/or t
2, because this output signal P has also represented the variation in pressure that occurs based on a fuel supply volume that has changed clearly in fuel oil storage 110.But only be in inoperative state at first regulating loop, promptly this regulated signal S2 is adjusted under the situation of a constant trigger value, substitutes regulated signal S2 and to analyze this output signal just meaningful.
Not necessarily leave no choice but obtain time point t by following measure
1: batching unit 160 from basically fully open As time goes on be closed gradually.On the contrary, this time point t
1Also can be by to the opposite control of batching unit 160, promptly As time goes on this batching unit 160 from being opened gradually to the small part closing state.In order to obtain time point t
2, described at last, be impossible to the control of batching unit because required for this reason, to restart internal-combustion engine with just seldom a fuel supply volume that is provided by this batching unit when the beginning can be impossible.
But can not be only by analyzing at time point t
1Or t
2The time data parts drawing relevant injection system have defective or the non-compliant conclusion of its performance.On the contrary, when described first regulating loop works, be used for pressure regulator valve 130 control signal S2 variation or under the inoperative situation of described first regulating loop particularly at time point t
1And t
2But between pressure transducer 120 variation of output signals also inference be a kind of like this defective.In order to make such inference become possibility, this batching unit 160 so was triggered during the described time lag, and this batching unit is opened or closed at least basically in time linearly.Putting before this-fuel oil is discharged in the internal-combustion engine from the fuel oil storage consistently, comprises that the loss that may occur, observed signal S2 or P demonstrate linear characteristic equally, if the parts proper functioning of injection system during this time lag.And if these signals do not demonstrate linear characteristic during the described time lag, promptly these signals are stepped change for example, and then can draw may defective conclusion in batching unit 160 or pressure regulator valve 130.
No matter be that in many aforesaid schemes which finally is used, so that obtain the defective in the batching unit 160, following situation is sure:
If determine such defective based on the unallowed big deviation that the one or many of the actual fuel delivery of batching unit 160 and rated fuel delivery is determined, two kinds of schemes that are used for following way then arranged in principle:
First kind of possibility is, checking out defective batching unit to be replaced by a batching unit that does not have defective.Do not have the batching unit of defective from then on to set out for this: this batching unit is according to electric current (flow) I (Q who is deposited with in the controller 140
zThe performance of)-characteristic curve is as the batching unit of standard.Accurately adjusting the fuel feed amount in not having the batching unit of defective can be in the future by by the I (Q that deposits
z)-characteristic curve is controlled this unit and is implemented.
Second kind of possible way be, continues with defectiveness as beforely or do not meet batching unit 160 work of standard operation, as long as can offset that it is determined, actual fault state by a corresponding control adaptive or that revised.Can for example so carry out for the correction of described control, promptly be deposited with characteristic curve in the controller 140, standard by standard by preferably being corrected in deviation that be determined under a plurality of working staties, between actual fuel delivery and its corresponding rated fuel delivery.For example draw then at I (Q shown in Fig. 6, that revised
z)-characteristic curve.Draw the characteristic curve that this has been revised by interpolation between a support point big as far as possible quantity, that obtained by described fuel delivery comparison.Just also can accurately control the batching unit 160 that does not have complete ideal operation by this characteristic curve of having revised by controller 140.
Described the method according to this invention preferably realizes with the form of a computer program.This computer program can be stored in a data medium with other the computer program that is used for described controller in case of necessity.This data medium can be a floppy disk, CD, so-called fast storage (Flash-Memory) etc.Being stored in computer program on this data medium then can be used as product and sells the user.Substitute with the data medium transmission, also can not have to transmit this computer program via the communication network of an electronics, particularly internet under the situation of data medium.
Claims (15)
1. be used to detect an injection system (100), the particularly method of the injection system of going the same way of an internal-combustion engine, wherein, this injection system (100) has a fuel oil storage (110) and a batching unit (160) controlled, that be used for controlling the fuel feed amount that enters into fuel oil storage (110); This method may further comprise the steps:
Aspect the possible defective of parts that relate to injection system (100), analyze a signal over time of representing the pressure in the fuel oil storage (110),
It is characterized in that this batching unit (160) is closed gradually or opened during analyzing this signal.
2. by the described method of claim 1, it is characterized in that described signal is being obtained a very first time point (t when predetermined first rotating speed of of internal-combustion engine
1) aspect is analyzed, a fuel flow lighting the pressure regulator valve (130) by injection system (100) from this very first time begins to reduce based on the minimizing gradually of the amount of fuel of transporting to fuel oil storage (110).
3. by the described method of claim 2, it is characterized in that, obtain a batching unit (160) in fact at very first time point (t
1) time the actual fuel delivery (V that provides for fuel oil storage (110)
Actual), as the high pressure fuel pump (170) of injection system (100) fuel delivery when described first rotating speed.
4. by the described method of claim 1, it is characterized in that described signal is being obtained one second time point (t when predetermined first rotating speed of of internal-combustion engine
2) aspect is analyzed, the described fuel flow of lighting the pressure regulator valve (130) by injection system (100) from this second time interrupts at least approx fully.
5. by the described method of claim 4, it is characterized in that, obtain described batching unit (160) in fact at the second time point (t
2) time the actual fuel delivery (V that provides for fuel oil storage (110)
Actual), preferably include the leakage of the sparger (180) that is used for injection system (100) and controlled quentity controlled variable when described first rotating speed at interior, known fuel consume as internal-combustion engine.
6. by claim 3 or 5 described methods, it is characterized in that, obtain described batching unit (160) at the first or second time point (t
1, t
2) time rated fuel delivery (V that provides for fuel oil storage (110)
Specified), when this rated fuel delivery meets standard; And work as at the first and/or second time point (t
1, t
2) time rated fuel delivery (V that obtains
Specified) and the actual fuel delivery (V that obtains
Actual) between deviation, the tolerance range that allow given in advance greater than one the time, draw defective conclusion in as the batching unit (160) of parts of injection system (100).
7. by the described method of claim 6, it is characterized in that being used at least, the method for another predetermined rotating speed is repeated.
8. by one of claim 2 to 7 described method, it is characterized in that, in order to determine the described first or second time point (t
1, t
2), a regulating loop that is used for regulating via pressure regulator valve (130) pressure of fuel oil storage (110) is operated, and described batching unit (160) is closed gradually, and when the time comes one be used for pressure regulator valve (130), analyzed as the control signal of time dependent signal of the pressure of representing fuel oil storage (110).
9. by one of claim 2 to 7 described method, it is characterized in that, in order to determine the described first or second time point (t
1, t
2), the regulating loop of pressure that is used for regulating via pressure regulator valve (130) fuel oil storage (110) is so inoperative: pressure regulator valve (130) is controlled with a constant in time control signal, and batching unit (160) is closed gradually; And when the time comes on the output terminal of a pressure transducer (120) that is arranged in this regulating loop, analyzed as the measurement signal of the signal over time of the pressure of representing fuel oil storage (110).
10. by one of above claim described method, it is characterized in that, so control batching unit (160), this batching unit is opened or closed to substantial linear in time at least; And the down periods are not defective conclusions in the parts that draw when yet being linear change at least basically at injection system (100) linearly at batching unit (160) when described signal.
11. have the computer program of program-code of a controller (140) of an injection system (100) that is used for an internal-combustion engine, it is characterized in that this computer program is used for implementing according to the described method of one of claim 1 to 10.
12. have the data medium of computer program according to claim 11.
13. be used for the controller (140) of an injection system (100) of an internal-combustion engine, it is characterized in that this controller (140) is used for implementing according to the described method of one of claim 1 to 10.
14. by the described controller of claim 13 (140), it is characterized in that, this controller (140) is used to generate I (the V)-characteristic curve or V (the I)-characteristic curve of a reality, so makes this characteristic curve represent the actual characteristic of actual adopted batching unit (160): by standard by for when implementing, draw by the described method of claim 6, revise a standard feature curve of being stored that is used for the batching unit of a standard about the understanding of actual fuel delivery in batching unit reality and standard and the deviation between rated fuel delivery.
15., it is characterized in that this controller is used for controlling in fact adopted batching unit (160) by standard by the characteristic curve of reality by the described controller of claim 14 (140).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10354656.1A DE10354656B4 (en) | 2003-11-22 | 2003-11-22 | Method for monitoring an injection system of an internal combustion engine |
| DE10354656.1 | 2003-11-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1654802A true CN1654802A (en) | 2005-08-17 |
| CN100473814C CN100473814C (en) | 2009-04-01 |
Family
ID=34530291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100757412A Expired - Fee Related CN100473814C (en) | 2003-11-22 | 2004-11-22 | Injection system monitoring method for internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN100473814C (en) |
| DE (1) | DE10354656B4 (en) |
| FR (1) | FR2862714B1 (en) |
| IT (1) | ITMI20042225A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104354876A (en) * | 2014-11-06 | 2015-02-18 | 西安航空制动科技有限公司 | Airplane wheel speed sensor capable of lastingly outputting high voltage and design method of airplane wheel speed sensor |
| CN106460762A (en) * | 2014-04-08 | 2017-02-22 | 大陆汽车有限公司 | Pressure accumulator device for a motor vehicle fuel injection system, and method for operating a pressure accumulator device of said type |
| CN108146343A (en) * | 2016-12-02 | 2018-06-12 | 财团法人资讯工业策进会 | Early warning system and method for early warning |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005028810A1 (en) | 2005-06-22 | 2007-01-04 | Robert Bosch Gmbh | Method for the automated testing of a controller |
| JP4659648B2 (en) * | 2006-03-08 | 2011-03-30 | 本田技研工業株式会社 | Abnormality judgment device for fuel supply system |
| DE102014208870A1 (en) | 2014-05-12 | 2015-11-12 | Robert Bosch Gmbh | Method for operating an injection system |
| JP6250886B2 (en) * | 2014-07-10 | 2017-12-20 | トヨタ自動車株式会社 | Engine control device |
| DE102014226565A1 (en) | 2014-12-19 | 2016-06-23 | Robert Bosch Gmbh | Method for testing a fuel delivery device, as well as a control device and a workshop tester |
| DE102015207452B4 (en) | 2015-04-23 | 2023-02-02 | Robert Bosch Gmbh | Procedure for testing a fuel delivery system, as well as a control unit and a workshop tester |
| DE102019204482A1 (en) * | 2019-03-29 | 2020-10-01 | Robert Bosch Gmbh | Procedure for testing an injector |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19757655C2 (en) * | 1997-12-23 | 2002-09-26 | Siemens Ag | Method and device for monitoring the function of a pressure sensor |
| DE19937962A1 (en) * | 1999-08-11 | 2001-02-15 | Bosch Gmbh Robert | IC engine common-rail fuel injection system control method monitors valve inserted between high pressure and low pressure regions for indicating fault |
| DE19946506C1 (en) * | 1999-09-28 | 2001-07-19 | Siemens Ag | Detecting failure in pressure system of IC engine fuel injection system |
| DE10103867A1 (en) * | 2000-05-03 | 2001-11-08 | Bosch Gmbh Robert | Method and device for monitoring a fuel metering system of an internal combustion engine |
| DE10136179A1 (en) * | 2001-07-25 | 2003-02-13 | Bosch Gmbh Robert | Method for operating an internal combustion engine, in particular a motor vehicle |
| US6715468B2 (en) * | 2001-11-07 | 2004-04-06 | Denso Corporation | Fuel injection system |
-
2003
- 2003-11-22 DE DE10354656.1A patent/DE10354656B4/en not_active Expired - Fee Related
-
2004
- 2004-11-19 FR FR0452690A patent/FR2862714B1/en not_active Expired - Fee Related
- 2004-11-19 IT IT002225A patent/ITMI20042225A1/en unknown
- 2004-11-22 CN CNB2004100757412A patent/CN100473814C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106460762A (en) * | 2014-04-08 | 2017-02-22 | 大陆汽车有限公司 | Pressure accumulator device for a motor vehicle fuel injection system, and method for operating a pressure accumulator device of said type |
| CN106460762B (en) * | 2014-04-08 | 2019-11-12 | 大陆汽车有限公司 | For the accumulator device of fuel for motor vehicles spraying system, and the method for the accumulator device for operating the type |
| US10473050B2 (en) | 2014-04-08 | 2019-11-12 | Cpt Group Gmbh | Pressure accumulator device for a motor vehicle fuel injection system, and method for operating a pressure accumulator device of said type |
| CN104354876A (en) * | 2014-11-06 | 2015-02-18 | 西安航空制动科技有限公司 | Airplane wheel speed sensor capable of lastingly outputting high voltage and design method of airplane wheel speed sensor |
| CN104354876B (en) * | 2014-11-06 | 2016-07-06 | 西安航空制动科技有限公司 | Wheel spin-up transducer and the method for designing thereof of output HIGH voltage can be continued |
| CN108146343A (en) * | 2016-12-02 | 2018-06-12 | 财团法人资讯工业策进会 | Early warning system and method for early warning |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10354656B4 (en) | 2018-02-08 |
| ITMI20042225A1 (en) | 2005-02-19 |
| FR2862714B1 (en) | 2011-03-18 |
| FR2862714A1 (en) | 2005-05-27 |
| DE10354656A1 (en) | 2005-06-23 |
| CN100473814C (en) | 2009-04-01 |
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