CN103807026A - Method for operating electric fuel pump of fuel system of internal combustion engine, involves determining function of executive change by varying flow rate, such that torque of engine is correlated with trait than adequate capacity - Google Patents
Method for operating electric fuel pump of fuel system of internal combustion engine, involves determining function of executive change by varying flow rate, such that torque of engine is correlated with trait than adequate capacity Download PDFInfo
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- CN103807026A CN103807026A CN201310547413.7A CN201310547413A CN103807026A CN 103807026 A CN103807026 A CN 103807026A CN 201310547413 A CN201310547413 A CN 201310547413A CN 103807026 A CN103807026 A CN 103807026A
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- combustion engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1497—With detection of the mechanical response of the engine
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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
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
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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
- F02D41/24—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
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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
- F02D41/3082—Control of electrical fuel pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
- F02M37/0058—Returnless fuel systems, i.e. the fuel return lines are not entering the fuel tank
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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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
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/31—Control of the fuel pressure
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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
- F02D41/24—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
- F02D41/2432—Methods of calibration
Abstract
The method involves operating electric fuel pump (36) in second phase. The flow rate is driven by a preset value. The function of the executive change is determined by varying the flow rate, such that torque of the internal combustion engine (10) is correlated with trait than adequate capacity. The torque of the internal combustion engine correlated with characteristic of the speed signal of the internal combustion engine is determined. Independent claims are included for the following: (1) computing unit; and (2) machine-readable storage medium storing computer program for operating electric fuel pump.
Description
Technical field
The present invention relates to a kind of method of electric petrolift of the ejecting system for operation of combustion engine and a kind of for implementing the computing unit of the method.
Background technique
In the fuel injection system of internal-combustion engine, make the petrolift (EKP) of electricity consumption, it is connected with a fuel container at inlet side and is connected with a pressure span at outlet side, in order to fuel is input to pressure span from described fuel container.
In DE 101 60 311 A1, describe, having in the internal-combustion engine of intake manifold injection device, by the petrolift of an electricity, fuel is input to a pressure span from a fuel container, on this pressure span, connect again a Fuelinjection nozzle.This Fuelinjection nozzle is arranged in the suction tude of internal-combustion engine.By this way, fuel can arrive in described suction tude and from this suction tude and arrive the firing chamber of internal-combustion engine via described Fuelinjection nozzle.
Having in the internal-combustion engine of gasoline or direct diesel injection device; fuel is by the petrolift of a corresponding electricity; it is referred to herein as pre-transfer pump, is input to a pressure span from fuel container, and fuel arrives the high pressure fuel pump (main transfer pump) conventionally mechanically driving from this pressure span.This high pressure fuel pump is input to fuel in one fuel collection pipeline (rail) again, connects multiple spargers and fuel and be under high pressure stored in described fuel collection pipeline on this fuel collection pipeline.Described sparger is directly injected to fuel respectively in the corresponding firing chamber of internal-combustion engine.
As design proposal, so-called fuel system that control according to demand or that regulate has according to demand been described in DE 101 60 311 A1, wherein, it can be constant pressure system, wherein, the pressure regulator by manipulating a machinery is adjusted to the pressure in described pressure span in one constant value.Described petrolift is not to manipulate with maximum transmission power constantly at this, but only correspondingly manipulates (so-called according to the manipulation of operating point) with the actual demand of described internal-combustion engine.This can for example be undertaken by the mode of utilizing a corresponding manipulation duty recently to manipulate the petrolift of described electricity.
But functional for used mechanical pressure regulator, require in principle a so-called inflow-rate of water turbine, that is to say, the fuel quantity of carrying too much in principle, and again return and flow in described fuel container by described pressure regulator via a reflux line.Therefore, the manipulation of described petrolift is so design in practice, except instantaneous demand, the always certain inflow-rate of water turbine of subsidiary conveying, in order to particularly also to guarantee the functional of described pressure regulator for petrolift aging and/or that power level is less in the category of serial deviation, minimum inflow-rate of water turbine is based on described power level.This has also caused the energy requirement improving and has caused for example cost of negative effect related to this and discharge capacity except causing the wearing and tearing of raising of pump.
Be worth yearning for, particularly, in the situation that not thering is additional sensor, utilize an as far as possible little inflow-rate of water turbine to move the petrolift of an electricity.
Summary of the invention
According to the present invention, suggestion has a kind of method of electric petrolift of the ejecting system for operation of combustion engine of the feature of independent claims and a kind of for implementing the computing unit of the method.Favourable design proposal is the theme of dependent claims and specification below.
The present invention proposes a kind of method, in the fuel system that regulated according to demand in other words of controlling according to demand of mentioning in article beginning, reduced inflow-rate of water turbine or abandoned using the additional sensor expending.The present invention is suitable for petrol system and diesel systems and intake manifold injection device and direct injection apparatus in an identical manner.The method according to this invention particularly also can be used in the system without lambda sensor.This is particularly favourable for the use the two-wheeled in the situation that, because it does not usually have corresponding probe.
In category of the present invention, the electric petrolift of the fuel system of internal-combustion engine utilizes a transmission power to move at more late second time point (so-called operation phase), this transmission power at a very first time point (so-called matching stage) early by changing described transmission power and being confirmed as enough transmission powers by monitoring related to this characteristic parameter changing.
At this, can monitor in principle pressure in fuel system as corresponding characteristic parameter.But this need to be additional sensor.Therefore the characteristic parameter of a kind of alternative used according to the invention.A feature associated with the torque phase of described internal-combustion engine in the case, the variation of described torque in other words.In the case, particularly comprise a dtc signal feature of described dtc signal in other words.
Particularly as the feature associated with the torque phase of described internal-combustion engine, use one (indication) cylinder middle pressure (pmi), one feature for mechanical work (MWF) and/or a torque curve feature based on described torque, its from a crank shaft angle, one and the moment of inertia of Angular correlation and a tachometer value derive (the particularly integration of this curve).Preferred embodiment elaborate above-mentioned value below with reference to of the present invention.
At this, the present invention utilizes following knowledge, as described below, and rotating speed is associated with motor torque, and motor torque is relevant to the fuel quantity spraying into.In any case described rotating speed all can detect in corresponding internal-combustion engine, therefore has a tach signal and can evaluate.Therefore the method is also feasible in the case of not having additional sensor.
According to the present invention, described inflow-rate of water turbine can be reduced to a minimum value, in the time giving described pressure regulator enough functional, this minimum value for example may even be positioned at respectively, below the MANUFACTURER of mechanical pressure regulator (by) specified minimum inflow-rate of water turbine at this point.In some cases, when the enough injections of the pressure sufficient to guarantee one that regulates of pre-control by coupling (below also referred to as " not thering is the flexible program of pressure regulator "), even can give up the overcurrent (ü berstr men) of described pressure regulator completely.This can with situation below under independently carry out, whether what install is slightly more by force or more weak, for example aging electric petrolift.
The flexible program without pressure regulator can be realized a kind of cheap implementation of abnormal cost of ejecting system, and it is easily out of order hardly in addition.
What the reducing of the electric power of the petrolift of described electricity directly caused consuming reduce and therefore cause especially reducing of CO2 emission.At this, the present invention can realize especially and in vehicle, adopt the method for operation regulating according to demand in other words of particularly controlling according to demand, and this does not carry out up to now for economic reasons, for example, the in the situation that of two-wheeled.In the case of having adopted up to now for some reason the petrolift of overdimensioned electricity, the present invention has realized reducing of its electric power.
As previously mentioned, the manipulation relevant to operating point of the petrolift of an electricity is for example by carrying out with the manipulation of a corresponding manipulation dutycycle.The present invention particularly stipulates, this manipulation dutycycle first for test purpose, that is to say in the operating mode that is called coupling operation here and little by little reduces in the suitable constant stage.At this, described manipulation dutycycle is lowered always, until described motor torque has reached the pre-determined maximum variation allowing.
Have in the system of controlling according to demand of mechanical pressure regulator one, the petrolift of described electricity at least has described minimum inflow-rate of water turbine, described motor consumption and (optionally) for example push-in stroke for the jet pump in tank or in the parts of other installation.At this, determine the design proposal for described manipulation, due to serial deviation and/or the most weak electric petrolift of the aging power causing.But for system, do not know, whether exist a corresponding power strong or electric petrolift that power is weak.This means, in the system of electric petrolift with average power level, described inflow-rate of water turbine is positioned on described minimum inflow-rate of water turbine.
If little by little reduce described manipulation dutycycle described coupling is in service, cause described electricity petrolift less power and therefore in the case of given pressure, cause a quantity delivered reducing.The pressure regulator of described machinery utilizes inflow-rate of water turbine less and less to move thus.As long as still exceeded described minimum inflow-rate of water turbine, do not cause especially little the reducing that reduces or only cause described pressure of described pressure.If cannot provide again described minimum inflow-rate of water turbine (except the motor consumption that will carry all the time and in some cases for required push-in stroke of described jet pump etc.) but described manipulation dutycycle is reduced to the petrolift of described electricity, carry out stronger the reducing of described fuel pressure.As long as also do not carry out reaction of a lambda controlling device etc., first this cause an emitted dose reducing, and it causes again a motor torque reducing and ground associated with it, also causes the variation in described tach signal.
Therefore, coupling the reduction of bringing out in service in other words the corresponding of described motor torque reduce, illustrated whether described pump power is exceedingly reduced.Described manipulation dutycycle must be improved again slightly in the case.In other words, the pump power of the petrolift of described electricity is reduced always, until the variation of the described motor torque variation of the feature in described tach signal related to this has in other words reached the threshold value that prior conduct still limits acceptably.Can effectively utilize especially thus described fuel system, wherein, advantageously add subsequently in some cases certain safety clearance.At this, acceptable threshold value can limit according to project respectively particularly.
For example by with the reducing of manipulation dutycycle that more also can for example, carry out pre-control at other operating point (the motor consumption in the case of other) of indicatrix.Therefore this needn't individually prepare burden again.For balance burn-in effects as much as possible, between described coupling operation advantageously or ground for example carries out repetition in the time lag of definition.
The present invention not only balance the performance of system aspect the electric petrolift of different power levels.It has also allowed, in the time having determined that in the category of described coupling operation the impact that mixture forms is in other words no more than the value of definition for pressure initiation, lower than the distinctive minimum inflow-rate of water turbine of described pressure regulator, wherein, described impact via described motor torque in other words tach signal associated with it obtain.
According to computing unit of the present invention, the control apparatus of for example Motor Vehicle, particularly program technic Shangdi is provided for implementing the method according to this invention.
Described method is also favourable with the execution of the form of software, because it has caused especially little expense, in any case particularly when the controller of implementing is also for other task and while therefore all existing.For particularly disk, hard disk, flash memory, EEPROM, CD-ROM, DVD etc. of suitable data medium of described computer program is provided.It is also feasible downloading via computer network (internet, in-house network).
Other advantage of the present invention and design proposal provide from specification and accompanying drawing.
It being understood that above-mentioned and also feature to be explained below can be not only in the combination of correspondence explanation, and in other combination or with independent form application, and do not leave scope of the present invention.
Accompanying drawing explanation
The present invention schematically illustrates and with reference to accompanying drawing in the situation that, describes in detail below by the embodiment in accompanying drawing.
Fig. 1 shows the schematic block diagrams of the internal-combustion engine with an ejecting system, and described ejecting system has the petrolift of an electricity, as basic place of the present invention;
Fig. 2 shows according to the indicative flowchart of a kind of method preferred embodiment of the present invention;
Fig. 3 has illustrated the curve of the internal-combustion engine parameter during implementing the method according to this invention in a figure;
Fig. 4 has illustrated the emitted dose of the fuel in the cylinder that is being ejected into an internal-combustion engine and the parameter MWF association between pmi in other words related to this in a figure;
Fig. 5 has illustrated during a work cycle speed curves that has an internal-combustion engine of cylinder in a figure.
Embodiment
In Fig. 1, in an entire internal combustion engine, there is reference character 10.It comprises multiple firing chambers, and wherein, only a combustion chamber using reference character 12 represents.Described firing chamber 12 can be connected with a suction tude 16 via an inlet valve 14.In described suction tude 16, arrange a fuel injection system 18.In the upstream of described fuel injection system 18, in described suction tude, also there is a throttling flap 20 and and is for example configured to the air flow meter 22 of hot-film sensor.Described firing chamber 12 can be connected with a flue gas leading 26 via an outlet valve 24.One fuel/air mixture is lighted a fire by a spark plug 28 in described firing chamber 12.This igniting is manipulated by an ignition system 30.
But the present invention not only can shown in the internal-combustion engine with intake manifold injection device 10 in use, also can in the internal-combustion engine with gasoline or direct diesel injection device, use, particularly also can in known common rail system, use.
The gas of combustion of heat out arrives described flue gas leading 26 via one or more outlet valves 24 from the firing chamber 12 of described internal-combustion engine 10.In this flue gas leading, can arrange a catalyst converter 31 and a lambda sensor 33.As mentioned above, the present invention is also suitable for not having the corresponding system of lambda sensor 33 in special mode.
Described fuel injection system 18 is parts of a fuel system 32.This fuel system comprises that the petrolift 36 of fuel container 34, one electricity can be transported to fuel in one fuel channel 38 from described fuel container, and this fuel channel guides to described fuel injection system 18.Electricity the downstream of the petrolift 36 that drives, described fuel channel 38 is connected with the pressure regulator 40 of a machinery.Guide a pipeline 39 to be back to described fuel container 34 from described pressure regulator.The described petrolift driving 36 and described pressure regulator 40 also can be configured to a common module in described fuel container 34 electricly.
The fuel pressure producing in described fuel channel 38 can be detected by a pressure transducer 44 alternatively, and this pressure transducer can be the parts of above-mentioned common module equally.Described pressure transducer provides corresponding signal on a control and regulating equipment 46.Described control and regulating equipment also can obtain described lambda sensor 33(if present), the signal of described air flow meter 22 and a speed probe 48, described speed probe measures the rotating speed of the bent axle 50 of described internal-combustion engine 10.In addition, can carry to described control and regulating equipment 46 signal of a temperature transducer 52, this temperature transducer detects the temperature of the motor piece (not shown) of described internal-combustion engine 10.A state transmitter 54 for detection of the position state of a gas pedal 56 also can be connected with described control and regulating equipment 46.
At outlet side, described control and regulating equipment 46 main manipulation described ignition system 30, described throttling flap 20 and described fuel injection system 18.In addition also can be regulated by described control and regulating equipment 46, the manipulation power of the petrolift 36 of described electricity.This manipulation by a clock module 58 occurs, this clock module output one manipulation dutycycle.
In the internal-combustion engine shown in Fig. 1, the fuel pressure producing by the manipulation of described pressure regulator 40 can be controlled or (in the case of the actual value feedback by means of a pressure transducer) adjusting by described control and regulating equipment 46.By a corresponding control according to demand of described petrolift 36 or adjusting according to demand, described petrolift manipulates via described clock module 58 by described control and regulating equipment 46 equally, make described pump 36 that certain specified quantity delivered is provided, this specified quantity delivered is enough to be provided for the required dosage of described fuel injection system 18, be provided for if desired enough inflow-rate of water turbines of described pressure regulator 40, and be provided for enough controlled quentity controlled variables of the ejector pump (not existing) arranging alternatively here in described tank.This is common general knowledge in the prior art.Here adopt the present invention, to can realize the operation of the as far as possible little quantity delivered of utilization.
Describe of the method according to this invention referring now to Fig. 2 and 3 and preferred embodiment wherein, figure 2 illustrates a flow process planimetric map, and in Fig. 3, show the temporal performance of different parameters with the form of figure.
At this, in Fig. 3, utilize R to represent a manipulation parameter, be the manipulation dutycycle (Ansteuertastverh ltnis) for the petrolift 36 of described electricity here.Utilizing Q to represent the transmission power drawing from described manipulation signal, is a volume flow (volume/time) here.Utilize Q
0represent one (constant) volume flow, it is made up of for the possible controlled quentity controlled variable of ejector pump described motor consumption, an inflow-rate of water turbine for described pressure regulator 40 and.Utilize Q
1represent a volume flow, it is corresponding to the summation of described motor consumption and described controlled quentity controlled variable.Here no longer there is an inflow-rate of water turbine.Difference Q
0-Q
1just in time corresponding to a minimum inflow-rate of water turbine Q
uM, its for described pressure regulator 40 one according to set and the working method that fully works also not enough.But as front state, also can stipulate according to an embodiment of the invention, with certain degree lower than described minimum inflow-rate of water turbine Q
uMor even give up described minimum inflow-rate of water turbine.Also can cancel in the case described pressure regulator 40.
Utilize the downstream of petrolift 36 that p the is illustrated in described electricity pressure in described pressure span 38.Utilize Δ to represent the variation of the described torque causing from the described pressure loss, this variation is obtained from a feature of tach signal related to this, value pmi or the MWF that for example will set forth below.Δ has for example illustrated the percent deviation with a reference value.Described tach signal is for example corresponding to the signal of speed probe 48, and this speed probe measures the rotating speed of the bent axle 50 of described internal-combustion engine 10.
As previously mentioned, the method according to this invention can be divided into two stages, although they can jointly carry out, is not jointly to carry out.Important is only, the described first stage implemented before described second stage, wherein, be enough in principle, the described first stage is at very first time point early, only once for example after manufacturing described internal-combustion engine, or implements with the time lag of definition.Described second stage, at the second more late time point, preferably, at the normal operation period of described internal-combustion engine, is particularly implemented as far as possible continually and as far as possible for a long time.In Fig. 2, the described first stage starts in left side to illustrate with 200, and described second stage starts to illustrate with 300 on right side.
The described first stage, one, the very first time of morning was put beginning in step 200.This step can manually start, and for example, manufacturing after described internal-combustion engine or while stop in workshop, but it also can automatically start, for example, according to the duration of operation of road horsepower and/or described internal-combustion engine.
In following step 201, detect, whether described internal-combustion engine is positioned at one is suitable on the operating point of described coupling.For example, when a specified dosage is substantially in the time that keep constant in district described match time, there is an applicable operating point.If when described coupling is implemented after described manufacture and/or in a workshop stops, this condition can externally be guaranteed in some cases.If there is a suitable operating point, start actual coupling in step 202.
In step 202 at time point t
0start to reduce described transmission power Q, its mode is to reduce described manipulation dutycycle R here.This reduces aptly continuously (or with less step) and occurs.Described inflow-rate of water turbine declines, and this can cause slightly reducing of described pressure p in some cases.
In following step 203, whether monitoring, demonstrate the variation in the feature associated with the torque phase of described internal-combustion engine.According to particularly preferred mode of execution presented here, a feature of a for example tach signal of monitoring or this tach signal.If described pressure p reduces, in the case of the manipulation endurance remaining unchanged or the endurance of preparing burden, need the fuel quantity for described burning of batching to decline.This has caused reducing of described motor torque and related to this has caused the variation in described tach signal in unadjusted situation.Set forth this relation below with reference to Figure 4 and 5.
As long as there is an inflow-rate of water turbine, that is to say until time point t
1, described Pressure Drop and the described motor torque that causes thus reduce also very little.If but described quantity delivered reduces always, made lower than described minimum inflow-rate of water turbine Q
uM, affected the functional of described pressure regulator, thereby greatly reduced the pressure in described pressure span 38.
This can recognize by the feature of evaluating described tach signal.In the case, can define a threshold value Δ
0, from it, described transmission power is set as enough (higher than described threshold value Δ
0) or be designed to no longer enough (lower than described threshold value Δ
0).Δ
0in this diagram corresponding to Q
0.Even certain functional lower than Δ due to described pressure regulator
0situation under also exist, therefore described threshold value Δ
0also can design lowlyer, wherein, described quantity delivered is always Q >Q aptly
1.It utilizes Δ at this
0' explanation.To value Δ
0or Δ
0' also can add a corresponding safety coefficient.Described value Δ
0can according to circumstances or according to type or according to being used for be preset by those skilled in the art.If Δ is still positioned at described threshold value Δ
0on, described method is back to step 202.
Describedly reach described threshold value Δ
0, described method moves ahead with step 204, and its mode is that instantaneous transmission power is defined as to enough transmission power Q
0in other words instantaneous manipulation dutycycle is defined as to enough manipulation dutycycle R
0, and in a storage device 210 for instantaneous, store take described coupling as basic operating point.
For the coupling of other operating points, the stage of described method can start with step 200, carries out repetition for other operating points.In the case, also can be defined as enough manipulation dutycycles for other operating points by one is stored in described storage device 210.Different operating points is particularly distinguished by specified dosage.Replace, also can use identical Characteristic Field, therefore not every operating point all must be prepared burden.
In order to understand better, figure 3 illustrates for the performance that further reduces described transmission power.If further reduce described transmission power, at time point t
2reach a transmission power Q
1its Pressure Drop strong especially with one is connected, and this Pressure Drop has caused in some cases the still decline of acceptable described torque (Einbruch) and therefore caused the corresponding variation (not having the flexible program of pressure regulator) of the feature of described dtc signal.
At the second more late time point, particularly at normal operation period, the motion of the petrolift 36 of described electricity is optimised in the case of using the transmission power of storing to manipulate in other words dutycycle.The method starts in step 300 at the second time point.
In step 301, from described storage device 210, load the quantity delivered of storing for instantaneous operating point corresponding manipulation dutycycle R in other words
0.If do not preserve manipulation dutycycle for instantaneous operating point, this manipulation dutycycle for example can calculate the in the situation that of use characteristic curve, interpolation or extrapolation etc. from the preserved manipulation dutycycle for other operating point.
In step 302, utilize afterwards manipulation dutycycle R that load or that calculate
0manipulate the petrolift 36 of described electricity.So obtain by this way the operation of described petrolift, made described transmission power substantially corresponding with demand exactly.
In Fig. 4 with the form of figure show on abscissa take mg/WC(wherein WC represent each clutch release slave cylinder) associated as the emitted dose kmaz of unit and parameter MWF on y coordinate and pmi, described parameter can be advantageously used for the feature associated with the torque phase of an internal-combustion engine.
From this figure, be injected to the fuel quantity in the cylinder of an internal-combustion engine, particularly under definite operating conditions as thin (magerer) burning, directly be associated with parameter pmi or the MWF of each clutch release slave cylinder WC, wherein, described lean combustion has guaranteed that the fuel quantity spraying into is changed reliably completely.
At this, pmi is the middle pressure (indicated mean effective pressure, Indicated Mean Effected Pressure) of the indication of common general knowledge, and it shows one for by each cylinder institute work measuring divided by corresponding lifting volume.The middle pressure of described indication can calculate according to equation 1 below, wherein, and V
hrepresent the lifting volume of cylinder:
Also should be noted that, pmi is via whole work cycle or only calculate via a high tension loop or low tension loop.For described pmi calculates, need to be for a combustion chamber pressure sensor of each cylinder.
Replace chamber pressure to measure, also can directly carry out a rotating speed evaluation.Certified, be for example worth MWF and as pmi, demonstrate a substantially the same performance of depending on emitted dose.The average acting features of MWF(, Mean Work Feature) represent the feature based on rotating speed of a mechanical work for each clutch release slave cylinder WC.MWF can calculate by the balancing energy the enforceable angular range of a restriction from described bent axle.Can use the tooth time of a measured encoder wheel for this reason or also can use the corresponding fan-shaped section time.
As article, beginning is mentioned, and MWF utilizes very little calculating to expend the feature of the confirmable merit for sending due to described burning.As shown in Figure 4, described value MWF is associated with described value pmi particularly well, thereby it can be used as alternative features.MWF is corresponding to the rotating energy E of the described bent axle when the different angle states
rotdifference, and calculate according to equation 2 below:
Here an energy partition before comparing the each burning in described internal-combustion engine and afterwards, wherein, in the case of the feature MWF shown in Fig. 4, consider the angle adjustment of (after igniting-OT, top dead center) 96 ° of KWnZOT and the angle position state in top dead center (OT is TDC in other words).This can be as the calculating of getting off:
The principle curve 500 of the rotation speed n that Fig. 5 has illustrated a single cylinder motor in further setting forth on a workmanship gap.Work cycle at this corresponding to 720 ° of KW(bent axles altogether) angular range 501.
Here show the different stage 1 to 4, they are passed through during a work cycle by described bent axle.Stage 1 represents compression, and the stage 2 represents burning, and the stage 3 represents to discharge, and the stage 4 represents suction tude, followed by duplication stages 1, i.e. compression again.
On abscissa, draw the angle value of described bent axle KW.Described angle value is angle position state based on described bent axle, when considered piston is starting described stage 2(burning) time be positioned at igniting OT(ZOT; OT represents top dead center) time, described angle position state is defined as 0 °.On y coordinate, draw the speed of the described bent axle take winding number per minute as unit.The speed of described bent axle is corresponding to the rotating speed of described bent axle.Dotted line 502 has been indicated a mean speed.Described rotating speed can be determined via the measurement of the tooth time 503 of described speed probe.
The in the situation that of four cylinder motors in the work cycle of one 720 ° of KW, visible four acceleration (by each cylinder), an and visible acceleration only the single cylinder motor illustrating in Fig. 2, in the stage 2, in the scope between 0 ° of KW and 180 ° of KW, in a work cycle 21, be greatly elevated to a maximum value 26 from a minimum value 24 at rotating speed described in this scope.Due to this fact, can be for calculated characteristics MWF be in other words in order to express introduced energy difference in the situation that of single cylinder motor, except evaluation phase 2(burning), go back evaluation phase 1(compression).
Another kind of alternative for the torque of evaluating an internal-combustion engine in other words the possibility of pmi be, from a tach signal, calculate the curve of an alternating segments, that is to say, only calculate the fluctuation of described torque according to equation 4 below:
In the case,
represent the angle of described bent axle and Θ (
) representing described crankshaft system and moment of inertia Angular correlation, described moment of inertia is made up of mass fraction that rotate and resonance.
Owing to cannot produce torque in top dead center (OT) and lower dead center (UT), because the piston of corresponding piston is arranged in topmost or is bottom, the point of the torque curve of estimating can be for estimating an absolute value.It is so definite in the case, draw in OT/UT/near mean value be zero, therefore can determine pmi by the ensuing integration that carries out in the torque calculating thus.
Claims (14)
1. for the method for the electric petrolift (36) of the ejecting system (32) of operation of combustion engine (10), wherein, the petrolift (36) of described electricity utilizes a transmission power (Q) to move at a second more late time point, at a very first time point early, by changing described transmission power (Q) and by monitoring the variation (Δ) of the associated feature of a torque phase that occur according to the change of described transmission power and described internal-combustion engine (10), described transmission power being determined to be to enough transmission powers.
2. in accordance with the method for claim 1, wherein, the feature associated with the torque phase of described internal-combustion engine (10) determined from the tach signal (500) of described internal-combustion engine (10).
3. according to the method described in claim 1 or 2, wherein, the feature (MWF) of the mechanical work of at least one cylinder for described internal-combustion engine (10) of use one based on rotating speed, as the feature associated with the torque phase of described internal-combustion engine (10).
4. according to the method described in claim 1 or 2, wherein, use at least one from crankshaft angles, with the moment of inertia of Angular correlation and tachometer value the integration of temporal torque curve of the described internal-combustion engine (10) of deriving, as the feature associated with the torque phase of described internal-combustion engine (10).
5. in accordance with the method for claim 1, wherein, in the cylinder of use one at least one cylinder of described internal-combustion engine (10), press, particularly mean indicated pressure (pmi), as the feature associated with the torque phase of described internal-combustion engine (10).
6. according to method in any one of the preceding claims wherein, wherein, the variation (Δ) occurring according to described transmission power (Q) is monitored in the situation that adopting a threshold value comparison.
7. according to method in any one of the preceding claims wherein, wherein, determine the enough transmission powers for the first operating point, and particularly in the situation that using at least one indicatrix, from described enough transmission powers for the first operating point, obtain the enough transmission powers for one second operating point, wherein, the petrolift of described electricity (36) moves for the transmission power of the second operating point described in described the second more late time point utilization.
8. according to method in any one of the preceding claims wherein, wherein, the petrolift of described electricity (36) moves by the manipulation of the manipulation signal to have a manipulation dutycycle (R).
9. in accordance with the method for claim 8, wherein, at described very first time point early, determine one draw described enough transmission powers for manipulating the manipulation dutycycle (R of described petrolift (36)
0), and be used for making the petrolift (36) of described electricity to move at described the second more late time point.
10. according to the method described in any one in claim 1 to 7, wherein, the petrolift of described electricity (36) moves by the manipulation of the manipulation signal to limit a revolution speed (n).
11. in accordance with the method for claim 10, wherein, at described very first time point early, determine one draw described enough transmission powers for manipulating the revolution speed of described petrolift (36), and be used for making petrolift (36) operation of described electricity at described the second more late time point.
12. computing units (46), it is provided for implementing according to method in any one of the preceding claims wherein.
13. computer programs, there is program code devices, in the time that described program code devices is implemented at a computing unit, particularly according to the computing unit described in claim 12, particularly a motor control apparatus, described program code devices is handled described computing unit and is implemented according to the method described in any one in claim 1 to 11.
The storage medium that 14. machines can be read, has stored thereon according to the computer program described in claim 13.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210220319 DE102012220319A1 (en) | 2012-11-08 | 2012-11-08 | Method for operating electric fuel pump of fuel system of internal combustion engine, involves determining function of executive change by varying flow rate, such that torque of engine is correlated with trait than adequate capacity |
| DE102012220319.2 | 2012-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103807026A true CN103807026A (en) | 2014-05-21 |
Family
ID=50489815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310547413.7A Pending CN103807026A (en) | 2012-11-08 | 2013-11-07 | Method for operating electric fuel pump of fuel system of internal combustion engine, involves determining function of executive change by varying flow rate, such that torque of engine is correlated with trait than adequate capacity |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20140059738A (en) |
| CN (1) | CN103807026A (en) |
| DE (1) | DE102012220319A1 (en) |
| FR (1) | FR2997728A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015207682B4 (en) * | 2015-04-27 | 2018-10-11 | Continental Automotive Gmbh | Method for controlling a fuel delivery pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3742563A1 (en) * | 1987-12-16 | 1989-07-06 | Pierburg Gmbh | Method for controlling the opening of electric fuel injection valves of an internal combustion engine |
| CN1535356A (en) * | 2001-07-31 | 2004-10-06 | Circuit arrangement and method for controlling electric fuel pump in non-return fuel delivery system | |
| EP1847706A1 (en) * | 2006-04-18 | 2007-10-24 | HONDA MOTOR CO., Ltd. | Fuel supply system for diesel engine |
| EP1847703A1 (en) * | 2006-04-19 | 2007-10-24 | Nikki Co., Ltd. | Fuel supply apparatus of engine |
| CN202065075U (en) * | 2011-04-26 | 2011-12-07 | 浙江吉利汽车研究院有限公司 | Control device of electric fuel pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10160311C2 (en) | 2001-12-07 | 2003-11-20 | Bosch Gmbh Robert | Method, computer program, control and regulating device for operating an internal combustion engine and internal combustion engine |
-
2012
- 2012-11-08 DE DE201210220319 patent/DE102012220319A1/en not_active Withdrawn
-
2013
- 2013-11-07 FR FR1360898A patent/FR2997728A1/en not_active Withdrawn
- 2013-11-07 KR KR1020130134685A patent/KR20140059738A/en not_active Application Discontinuation
- 2013-11-07 CN CN201310547413.7A patent/CN103807026A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3742563A1 (en) * | 1987-12-16 | 1989-07-06 | Pierburg Gmbh | Method for controlling the opening of electric fuel injection valves of an internal combustion engine |
| CN1535356A (en) * | 2001-07-31 | 2004-10-06 | Circuit arrangement and method for controlling electric fuel pump in non-return fuel delivery system | |
| EP1847706A1 (en) * | 2006-04-18 | 2007-10-24 | HONDA MOTOR CO., Ltd. | Fuel supply system for diesel engine |
| EP1847703A1 (en) * | 2006-04-19 | 2007-10-24 | Nikki Co., Ltd. | Fuel supply apparatus of engine |
| CN202065075U (en) * | 2011-04-26 | 2011-12-07 | 浙江吉利汽车研究院有限公司 | Control device of electric fuel pump |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140059738A (en) | 2014-05-16 |
| FR2997728A1 (en) | 2014-05-09 |
| DE102012220319A1 (en) | 2014-05-08 |
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