CN1995730B - System for controlling supply quantity of multiple fuel injection - Google Patents
System for controlling supply quantity of multiple fuel injection Download PDFInfo
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- CN1995730B CN1995730B CN 200510138167 CN200510138167A CN1995730B CN 1995730 B CN1995730 B CN 1995730B CN 200510138167 CN200510138167 CN 200510138167 CN 200510138167 A CN200510138167 A CN 200510138167A CN 1995730 B CN1995730 B CN 1995730B
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Abstract
The invention discloses a fuel injection control system for engine, comprising fuel injection component, sensor and electric controller communicated with fuel injection component and sensor. The fuel injection component can carry at least one main oil injection and one subsequent oil injection. The sensor can take the pressure of fluid supplied to fuel injection component and generate the signal representing pressure. The electric controller is configured to receive the first input representing the object expected by operator, the second input representing the operation status and determine the total fuel of main and subsequent oil injections, duration of main oil injection, subsequent delay and duration of subsequent oil injection. The duration of subsequent oil injection is based on the total fuel of main and subsequent oil injections, duration of main oil injection, subsequent delay, sensor signal, the first input and the second input.
Description
Technical field
The present invention generally relates to a kind of electronically controlled fuel injection system, relates in particular to a kind of being used for the fuel oil of the multi-injection method and system of the cylinder of IC engine supply accurately.
Background technique
The regulation of the effulent in the relevant engine exhaust comprises for example about hydrocarbon, carbon monoxide, particulate matter and nitrogen oxide (NO
x) the regulation of discharging, becoming more and more stricter.A kind of method that the control exhaust emission that engine shop man adopts and making it meets the regulation of such effulent standard is the fuel injection of strict control to each firing chamber of motor.For example, can change the number of times that the single circulation intermediate fuel oil at motor sprays, the amount of fuel of in once spraying, spraying,, change the emission characteristics of motor timing and each fuel delivery rate of spraying of each injection.
A kind of such ejection control method is called as split and sprays.This split sprays and comprises that typically a total amount of fuel that in a particular cycle of motor, infeeds the firing chamber is divided into twice or repeatedly independently injection mutually.For example, can be divided into a pilot injection (pilot injection) and a main injection to a single injection of fuel, or be divided into a main injection and a follow-up injection (anchor injection).But, the controllability of the injection that each time separates always receive the machinery relevant with the specific pattern of the sparger that is adopted with other circumscribed some restriction.Even adopt more advanced ECI electronic control injection device, in some operating condition of motor, also be difficult to accurately to control the fuel supply volume in the injection that each time separate sometimes.
Current split or multiple fuel injection system in usefulness can reach desirable engine performance under all rotating speeds of motor and load condition.Particularly; Because various restrictions to the accessible spray characteristic of different types; In pilot injection sprayable best amount of fuel, each time particular spray best regularly, the best between the best endurance between twice injection and allo twice injection interacts in succession, all can not reach with current ejecting system in usefulness.Its result; Such as once spray at certain intermediate fuel oil too much, fuel injection gets the problem that too fast and/or injected fuel surpassed the desirable halt and all possibly take place, these are all to the Economy generation adverse influence of the effulent in the exhaust and fuel oil.
For example; When an injection events comprises three different fuel injections; Since the machinery of a specific system or other narrow limitation; Endurance between each time sprayed possibly become so short, has not just begun follow-up injection in required time so that injection device possibly also not be able to do in time to finish fully initial injection.Because initial injection fails to end at fully before post-injection should begin, the amount of fuel of in current injection events, supplying with possibly depart from desirable amount significantly, in some situation, possibly depart from nearly 30 milliliters.These do not meet hope and fuel supply volume that be difficult to expect possibly have adverse influence to the efficient of motor and the effulent in the exhaust.
In each advanced system that can reach multi-injection and different injection rates characteristic; Possibly hope according to the desirable target of operator and motor operating condition control spray characteristic and/or the specific cylinder of fuel delivery of injection respectively repeatedly at particular point in time.This can comprise: for example be divided into fuel injection in a specific injection events twice or repeatedly independently spray (a for example pilot injection, main injection and once follow-up injection); Change the amount of fuel of supplying with in spraying each time; Carry out once or several times spraying in this injection events in advance; And/or adjust the endurance between each time injection, to reach the selected target of operator, breathe one's last and other similar target such as the minimal emissions in the exhaust, best fuel consume, reduction noise, minimizing.In some situation, also possibly hope to change when spraying into the beginning of firing chamber to fuel oil, in the whole injection or the fuel delivery rate when finishing, the combustion characteristic of the specific fuel oil that is adopted with control.In addition; Possibly between different ejection control methods, change; Reaching the desirable target of operator when motor turns round under various condition, these various conditions comprise such as in high or low Altitude Regions, under high moment of torsion or high rotating speed load or other known operating condition.The current control that is not easy to carry out this pattern at the various fuel injection systems of usefulness.
Therefore, the present invention is intended to overcome one or several problem in above-mentioned each problem.
Summary of the invention
One aspect of the present invention provides a kind of fuel injection control systems that is used for motor.This fuel injection control systems comprises a fuel injection device, a sensor and an electronic controller of keeping in touch with this fuel injection device and sensor.The fuel injection device can carry out at least once main oil and the follow-up oil of penetrating once penetrated.Sensor can be experienced the hydrodynamic pressure that supplies to the fuel injection device and produce a signal of representative pressure.Electronic controller is configured to receive one first input of representing the desirable target of operator; Receive one second input of the operating condition of representing motor; And confirm that the master penetrates oil and follow-up total amount of fuel, the master who penetrates oil penetrates the endurance of oil, follow-up time-delay and follow-up penetrating the oily endurance; Wherein, the follow-up endurance of penetrating oil is based on main penetrating oil and follow-up total amount of fuel of penetrating oil, mainly penetrating the endurance of oil, follow-up time-delay, sensor signal, first input and second and import.
Another aspect of the present invention provides a kind of computer-readable media that comprises the instruction that is used to control fuel injection control systems.Instruction comprises one second input that receives one first input of representing the desirable target of operator and receive the operating condition of representing motor.Instruction comprises that also impression supplies to a fluid pressure of fuel injection device and a signal of representative pressure is sent to controller.Instruction also comprises confirms a main oil and the follow-up total amount of fuel of penetrating oil of penetrating.Instruction also additionally comprises confirms main penetrating the endurance of oil, follow-up time-delay and follow-up endurance of penetrating oil.Wherein, the follow-up endurance of penetrating oil is based on main penetrating oil and follow-up total amount of fuel of penetrating oil, mainly penetrating the endurance of oil, follow-up time-delay, sensor signal, first input and second and import.
Description of drawings
Fig. 1 is the schematic representation of exemplary electronic control sparger oil-fired system of the present invention;
Fig. 2 is the exemplary schematic representation that comprises the time of an injection events penetrating oil for three times that is undertaken by the ECI electronic control injection device oil-fired system of Fig. 1;
Fig. 3 A is the schematic representation of exemplary current waveform that is supplied to the ECI electronic control injection device oil-fired system of Fig. 1;
Fig. 3 B comprises that the master who is undertaken by the ECI electronic control injection device oil-fired system of Fig. 1 penetrates oil and the follow-up schematic representation of penetrating an exemplary injection events of oil, and it is corresponding to the current waveform of Fig. 3 A;
Fig. 4 is a flow chart, an exemplary operation method of the ECI electronic control injection device oil-fired system that its expression is shown in Figure 1;
Fig. 5 is the schematic representation that expression is used for each exemplary injection method of ECI electronic control injection device oil-fired system shown in Figure 1.
Embodiment
With regard to the usage in this specification, an injection events is defined as each time fuel injection that in a single circulation of motor, takes place.For example, a four stroke engine circulation comprises aspirating stroke, compression stroke, expansion or power stroke and the exhaust stroke of piston motion.So in four stroke engine, injection events is included in pass by each time fuel injection of taking place in the motion cycle of these four strokes or penetrate oil of piston.Term " is penetrated oil "; As habitual in the art, can be meant actual fuel injection or refer to send to a current command signal fuel injector or other fuel oil driving element, that representative is carried out desirable fuel injection or supply to motor.
Please see Fig. 1, it expresses an exemplary fuel injection system 12 that is configured for compression ignition engine 14 of the present invention.Fuel injection system 12 can comprise one or more hydraulically powered control fuel injection devices, such as fuel injector 16, such device is installed in each cylinder head lumen pore of motor 14.Although the embodiment of Fig. 1 is applied to in-line arrangement 6 Cylinder engines; But the fuel injection system 12 that is appreciated that present announcement is applicable to the motor of other pattern similarly; Such as V-arrangement and/or rotary engine, and motor 14 can comprise the cylinder or the firing chamber of arbitrary number.In addition; Although it is hydraulically actuated electronic control that the embodiment of Fig. 1 expresses fuel injector 16; But should be familiar with and suspect equally: fuel injection system 12 also can likewise comprise the fuel injection device of other pattern, each the numerically controlled fuel oil valve that links such as the electronically controlled sparger of sparger, Mechanical Driven of electric drive and control, with the public fuel oil of high pressure Jiangxi pipe or the fuel injector of any other pattern known in the art.
Driving fluid transfer pump 28, a driving fluid cooler 30, one or more driving fluid filter 32, one that the device 18 that is used to supply driving fluid preferably includes a driving fluid cabinet 26, a relatively low pressure is used to the high-pressure service pump 34 and at least one the driving fluid house steward 38 that make driving fluid reach relatively high pressure.Can be arranged to be communicated in the outlet of high-pressure service pump 34 at driving fluid house steward 38 inner publicly-owned rail (common rail) paths 40.Each publicly-owned rail tributary circuit 42 is connected in publicly-owned rail path 40 to the driving fluid import of each fuel injector 16 respectively.Under the situation of the electronically controlled sparger of Mechanical Driven, the cam drive mechanism of available certain pattern or other mechanical device drive these spargers and replace driving fluid house steward 38, publicly-owned rail path 40 and tributary circuit 42.Some examples of the electronically controlled fuel injector of Mechanical Driven unit are seen U. S. Patent 5,947,380 and 5,407,131.
In a preferred embodiment, driving fluid can be the lubricant oil of motor, and driving fluid cabinet 26 can be an engine lubrication oil sump.When adopting this mode, can connect into fuel injection system 12 is sub-systems that parasitize the engine lubrication oil circulating system.Perhaps, driving fluid also can be a fuel oil.
Fuel oil supplying device 20 preferably includes fuel transfer pump 48, one or more fuel oil filter 50, a supplying fuel modulating valve 51 of supplying fuel path 46 that fuel inlet that a fuel tank 44, is arranged to make fuel tank 44 and each fuel injector 16 is communicated with, a relatively low pressure and is arranged to make a fuel flow and the current return circuit 49 that is communicated with between fuel tank 44 and each fuel injector 16.
The many aspects of ECM58 may command fuel-injected comprise: (1) fuel injection timing, total amount of fuel that spray in an injection events (2), (3) fuel-injection pressure; (4) individual injection in each injection events or penetrate oil number of times; (5) each time independently sprayed or penetrated the time lag between the oil, and the endurance of oil, the pressure of (7) driving fluid are sprayed or penetrated in (6) each time; (8) issue the level of the current waveform signal of sparger, the combination in any of (9) above each parameter.The rotating speed that can be independent of motor is controlled each in these parameters changeably with load.
ECM58 can receive a plurality of sensor input signal S
1-S
8, these signals are corresponding to the known sensor input relevant with the operating condition of motor 14.For example, these sensor inputs can comprise the pressure of temperature, driving fluid and/or the fuel oil of engine speed, lubricant oil or cooling liquid, position and other known state of piston.For example, engine temperature sensing unit 61 is expressed as in Fig. 1 and is connected in motor 14.In one embodiment, engine temperature sensing unit 61 can be experienced the temperature of engine lubricating oil.But, also can be alternatively or additionally use the temperature of an ECTS detection of engine 14.Engine temperature sensing unit 61 can produce and be called S
1Signal, it is transferred to ECM58.Similarly, publicly-owned rail pressure transducer 68 can be experienced publicly-owned rail pressure (pressure of the driving fluid that for example publicly-owned rail path is 40 li) and produce a S that is called that can be transferred to ECM58
2Signal.
These sensor inputs can be used for confirming and controlling the precise combination of each nozzle parameter of an injection events.ECM58 can respond one or more signal S that receives
1-S
8Send control signal S
9,, also can send fuel jet signal S with the pressure of control by the driving fluid of high-pressure service pump 34 outputs
10, so that each fuel injector 16 sprays into corresponding cylinder to fuel oil.Signal S
10Can comprise the electric current that ECM instructs, send to solenoid valve or other electric drive of fuel injector 16.
Should be realized that: the fuel spray characteristic in the fuel injection incident of any specific all possibly change according to the operating condition of motor 14.Have been found that: particularly under certain engine operating status, in a single fuel injection incident, independently spray with repeatedly (twice or more times) and to infeed exhaust emission situation and the oil consumption that specific cylinder can improve motor 14 to fuel oil.Fig. 2 expresses such injection events, and it comprises three independently fuel injections, is exactly, and oil 62, second fuel injection or main oil the 64 and the 3rd fuel injection or the follow-up oil 66 of penetrating penetrated are penetrated in first fuel injection or ignite.As shown in Figure 2, ignite and penetrate oil 62 and penetrate the firing chamber that oil 64 is sprayed into motor 14, penetrate oily 64 through just leading after a certain definite time coefficient that is called main time-delay (main delay) 63 or the crank angle prior to main.Can time coefficient of confirming that be called follow-up time-delay (anchordelay) 65 or crank angle carry out follow-uply penetrating oily 66 at interval after penetrating oil 64 main.Based on the programming relevant with the ECM58 of electronics; And be stored in various collection of illustrative plates and/or the question blank in the storage of ECM58; Comprise the data relevant with the load of the rotating speed of motor, motor, with publicly-owned rail path 40 relevant pressure (rail pressure (rail pressure)), desirable total fuel injection amount and other parameter, ECM58 dynamically confirms desirablely in each injection events to penetrate oily number of times, penetrate oily needed amount of fuel and their corresponding division at every turn.In addition, ECM58 can confirm that each time penetrate timing and endurance and each time of oil and penetrate the time-delay between the oil, for example main time-delay 63 and follow-up time-delay 65.That in Fig. 2, describes comprises in the multi-injection incident of penetrating oil for three times; A part that is supplied to total amount of fuel of firing chamber can be sprayed igniting to penetrate in the oil 62; Another part sprays main penetrating in the oil 64, and the remaining part in total amount of fuel sprays follow-up penetrating in the oil 66.This multi-injection incident of penetrating oil for three times that comprises can provide advantage aspect the engine exhaust effulent, comprises and reduces particulate matter and/or NOx discharge amount, and can also make motor be issued to desirable performance in many operating conditions, this will be further elucidated hereinbelow.
Fig. 3 A expresses an exemplary injection signal or " current waveform ", and Fig. 3 B expresses corresponding fuel injection incident.As injection signal S
10When being sent to fuel injector 16, but fuel injector 16 response signal S
10Characteristic and correspondingly open and close fuel valve gating element (not shown).For example, signal S
10In the current waveform 102 that comprises can comprise that indication is led and penetrate oil 104 and the follow-up current-order of penetrating oil 106.This current waveform 102 can be a special split jeting instruction, it have one related with it and in Fig. 3 A, be expressed as a follow-up follow-up time-delay 65 section C, unique of penetrating between the oil 106 of penetrating oil 104 and being instructed the master who is instructed.Section A penetrates oil 104 corresponding to the master who is instructed, and section B is corresponding to the follow-up oil 106 of penetrating that is instructed.Please 3B with the aid of pictures, wherein express an exemplary valve opening or a fuel delivery curve 108 that produces corresponding to the current waveform among Fig. 3 A 102.Because fuel injector 16 can not synchronously be reacted to the current signal that imposes on it; The fuel valve gating element of fuel injector 16 is still leaving after current signal has disappeared; And if follow-up time-delay C is enough short, fuel injector 16 possibly before its valve element is not closed as yet fully, just receive next current signal or the current pulse that applies begin the place.Enough short and penetrate the oily endurance (for example section A) when being an endurance of enough weak points at follow-up time-delay C when main, will produce a kind of being called as the state of " boots (boot) ".Although current waveform 102 shows as a state that separates; Master such as in the instruction penetrates oily current signal 104 and follow-up penetrating between the oily current signal 106 separated; But; Actual fuel injection possibly penetrated between the oil continuous basically at twice, and it shows as " boots " state represented like the valve opening curve of Fig. 3 B 108.When " boots " state occurring, if not desirable fuel delivery method, the amount of fuel of actual ejection possibly depart from desirable amount, and this possibly cause the effulent in engine efficiency decline and the exhaust to increase.Fuel delivery incident with " boots " state possibly cause at the amount of fuel of the early stage supply of the injection order height than split fuel delivery, and this is because in " boots " state, penetrates in each time that the fuel-injected flow can not drop to zero between the oil.
ECM58 maybe can the operation response person input change command signal S
10In the characteristic of the current waveform that comprises.Specifically, ECM58 can respond manual input and the zero-time or the title " logic starting point (start of logic) " that change each current pulse (SOL), termination time of each current pulse or " logic terminal point (end of logic) " (EOL), the amplitude of each current pulse and issuing each command signal S of fuel injector 16
10Waveform in the number of current pulse.In addition, can in injection events, regulate the pressure of the driving fluid that supplies to sparger 16 and/or the pressure of fuel oil by ECM58 operation response person's input.
Operator's input can be represented desirable objectives of operator and can be according to the incompatible change of applied field at that time of motor 14.For example, when motor turned round in specific geographic area, the reduction noise possibly be that the effulent in ratio engine efficient or the exhaust is more important.Other similarly compromise practice; Comprise that the white cigarette or the black smoke that for example make generation are minimum; Make the moment of torsion and the speed output optimization of motor, make effulent meet emission regulation, change the size of each additional load of the power of drawing motor 14 according to height above sea level or geographic area variation; And other similarly compromise practice known in the art can manually be configured in the ECM58.These compromise practices can be corresponding to each the specific collection of illustrative plates in the storage that is stored in ECM58.By this way; In the following time of first desirable target that runs on the operator; ECM58 can confirm the waveform of instruction with reference to first collection of illustrative plates, and in second the desirable target following time that runs on the operator, ECM58 can confirm the waveform of instruction with reference to second collection of illustrative plates.
As shown in fig. 1, motor 14 can be provided with a device 60 that is used for manually receiving the desirable target of operator.This device 60 can comprise: for example, and the manual switch that can between the position of arbitrary number, pull, and the positional number of this switch corresponds respectively to variant predeterminated target; The software set device that can when motor 14 startings or operation, dispose; Or other similar device known in the art.Hereinafter also will illustrate in greater detail; When ECM58 receives the manual indication of the desirable target of operator; Corresponding collection of illustrative plates or question blank that it can be inquired about in the storage that is stored in ECM58 are confirmed suitable instruction waveform; Issue motor 14 injected fuel with this instruction waveform, just can reach the desirable target of operator.
With reference to Fig. 4; Can be according to the desirable target of operator; With being arranged on the program on the computer-readable media; Confirm in the time in fact can producing or expect to produce " boots " state needed follow-up penetrate oil the endurance so that can the suitable moment desirable amount of fuel supply engine 14.Like this, this program is dynamically predicted generation " boots " state or the split spray regime will be taken place, and makes corresponding reaction.Computer-readable media can comprise any storage, but ECM58 preferably is set.Also have, program should be moved, and can pass through mechanized data transmission medium control signals transmitted S to produce
10, and the mechanized data transmission medium can be got in touch with a display device and an input device (not shown) that comprises the diagnosis pattern of display device and keyboard.
As stated, fuel injection system 12 preferably can provide twice or repeatedly penetrate oil in each injection events.Providing first step of repeatedly penetrating in the oil can comprise through installing that 60 (steps 110) receive the desirable target of operator and selecting the corresponding collection of illustrative plates in the storage of one or more ECM58 of being stored in for the characteristic that is used for confirming injection events.That is to say; As stated; The storage of ECM58 can store many collection of illustrative plates and/or question blank; Each corresponding to or classificationization ground corresponding to the desirable different target of operator, so that the relevant different oily methods (for example waveform) of penetrating of different operating conditions and/or application that maybe can produce with motor 14 to be provided.Then, program can through the collection of illustrative plates of selecting confirm as the function of engine speed and load desirable total amount of fuel, lead and penetrate oil mass, follow-uply penetrate oil mass and ignite and penetrate oil mass (step 112).Ignite and penetrate oil mass and can in another subroutine of main program, confirm, maybe can find it through question blank or the collection of illustrative plates that inquiry is stored in the storage of ECM58.
Fig. 5 expresses an a kind of embodiment of fuel-injecting method.That is to say; A certain desirable target for the operator; Can select the collection of illustrative plates of Fig. 5 the some similar collection of illustrative plates in the storage that is stored in ECM58 to relevant engine speed, engine load, desirable oily number, desirable amount of fuel and desirable SOL and the EOL that penetrates oil that penetrates oil of penetrating at every turn at every turn.For example, the collection of illustrative plates shown in Fig. 5 can be used for confirming to ignite and penetrates oil mass (step 114).Should be susceptible to: such collection of illustrative plates can be that the dependence experience is confirmed.In addition, should be susceptible to: if not stipulating to ignite for specific fuel injection incident penetrates oil, igniting so and penetrate oil mass can be zero.
Confirmed to ignite penetrate oil mass after, program can be set at main oil and the follow-up total amount of fuel of penetrating oil of penetrating to equal that fuel oil of speed regulator is exported or desirable total amount of fuel deducts the difference (step 116) of igniting and penetrating oil mass.In other words, owing to penetrate oil and may closely link for this twice, can penetrate oily total amount of fuel with this twice and consider as an individual event at the very start.Then, can confirm that desirable master penetrates the amount of fuel of oil, and confirm main minimum amount of fuel (step 118) of penetrating oil according to observed engine performance.In one embodiment, a collection of illustrative plates that is similar to that collection of illustrative plates shown in Fig. 5 capable of using confirms that desirable master penetrates the amount of fuel of oil.
Can be set in a preferable numerical value to the main minimum amount of fuel that penetrate oil, as be about 12 milliliters, maybe can be from as obtaining it similarly the question blank of the function of engine speed and load or the collection of illustrative plates.Can in fact when " boots " state take place through observation set preferable numerical value or collection of illustrative plates.Like this, when " boots " state will take place with the prediction of permission program and correspondingly make a response in minimum value or threshold value.Can desirable master be penetrated oily amount of fuel and compare (120) with main minimum amount of fuel of penetrating oil.If desirable master penetrates oily amount of fuel greater than main minimum amount of fuel of penetrating oil, program can cause the control return to and be used for a further definite call function (calling function) or main program that respectively sprays variable.But, not zero if main amount of fuel of penetrating oil is less than or equal to main minimum amount of fuel and the follow-up oil mass of penetrating of penetrating oil, program can be confirmed main penetrate oil endurance and follow-up time-delay (step 122) so.Like this, be less than or equal to the main desirable master who penetrates the minimum amount of fuel of oil and penetrate oil mass,, can form and to show the trigger condition (triggering condition) that whether will produce " boots " state together with the follow-up oil mass of penetrating that is not zero.Preferably before the endurance of penetrating oil for " boots state " setting of expecting is follow-up, verify this trigger condition.Like this, can confirm that the follow-up before definite desirable master of endurance who penetrates oil penetrates oil mass.
Should be able to be susceptible to: can alternatively use other condition as trigger condition.For example, can compare follow-up time-delay and the follow-up time-delay of minimum, if this follow-up time-delay is less than or equal to minimum follow-up time-delay, program can be confirmed follow-up penetrating the oil endurance according to " the boots state " of an expectation.Like this, program can be set the follow-up appearance of verifying trigger condition before the endurance of oil of penetrating at " the boots state " that be an expectation.In other words, the generation of program measurable " boots state " can a pair of according to that " boots state " be understood the prediction that takes place or the follow-up endurance of penetrating oil can not take place to confirm.
Program is confirmed main when penetrating oil endurance and follow-up time-delay in step 122, and available engine speed is penetrated oil endurance and follow-up time-delay with the master that load is searched question blank or collection of illustrative plates (for example according to previous question blank or the collection of illustrative plates of selecting of the desirable target of operator) lining as coefficient of relationship.Rail pressure can be by the continuously or termly impression and as signal S of rail pressure transducer 68 (see figure 1)s
2Send to ECM58, be used to control fuel injection rate.Preferably per 15 milliseconds or at main rail pressure of SOL place impression of penetrating oil, which the time lag weak point just undertaken by that.Rail pressure, main penetrating after oil endurance and the follow-up time-delay have been experienced or have confirmed; And confirmed to show that program just can be confirmed the follow-up endurance (step 126) of penetrating oil after the appearance of trigger condition of the spray regime that whether will produce " boots state " or separate.Confirm that the follow-up endurance of penetrating oil preferably comprises suitable question blank or the collection of illustrative plates of inquiring about in the storage that is stored in ECM58.The form of a kind of five dimensions that this question blank or collection of illustrative plates are preferably selected for ease of the operator manually imports desirable target.This five dimensions can comprise rail pressure, main penetrate oil and follow-up penetrate total amount of fuel of oil, main penetrate oil endurance, follow-up time-delay and by the follow-up of generation penetrate the oil endurance.Find when this form or collection of illustrative plates are used in generation " boots state " or when two injection events are closely linked mutually main penetrate oil with follow-up penetrate can reach in the oil spray the desirable follow-up of desirable amount of fuel and penetrate the oily endurance.Thus; Should be familiar with and suspect: said here running form or collection of illustrative plates can be taked the form of two dimension or three-dimensional table or collection of illustrative plates, wherein such as follow-up time-delay, rail pressure, engine speed, engine load, mainly penetrate the oil endurance and other special parameter can remain constant for some group form or collection of illustrative plates.Also can recognize similarly and imagine other variation and the configuration that needed form and collection of illustrative plates.Like this; Oil-fired system of the present invention; Can be according to four other variablees that possibly cause taking place " boots state ", whether can take place and dynamically set the follow-up endurance of penetrating oil through dynamically confirming " boots state ", the efficient that improves motor with reduce effulent.
Should be realized that within the spirit and scope of the present invention, the step of describing in can the flow chart to Fig. 4 is changed.Specifically, can add, rearrange and/or cancel one or more steps.All this type changes all will be considered to belong within the scope of the present invention.
Industrial usability
Adopt fuel injection system 12 of the present invention can in some operating condition of motor 14, improve effulent control.Though can change the specific injection waveform that is used to carry out multiple fuel injection according to specific operating condition and/or the desirable target of operator; But system of the present invention can confirm penetrating oily number of times, penetrate the endurance of oil, per displacement of penetrating any time-delay between the oil, allo generation of penetrating " boots state " between the oil for twice and the piston in compensation and the cylinder with respect to the starting point of each injection events for twice each time in the timing relevant with each single injection events, each injection events, and no matter the kind of the pattern of the pattern of electronically controlled fuel injection device, motor and used fuel oil how.In this connection; Can with rail pressure, engine speed, engine load, ignite when penetrating oil/master and penetrating oil/follow-up and penetrate oil endurance, pilot injection/main injection/follow-up injected fuel amount, follow-up fixed response time, ignite and penetrate oil/master and penetrate that oil/follow-up is penetrated the minimum amount of fuel of oil and the many suitable fuel oil collection of illustrative plates of other relating to parameters stores or is programmed in the ECM58, confession is used in various different operating conditions.Can take from the statistics that in the performance histories of similar sparger, similar motor and similar operating condition, obtains and accumulate with relevant some parameter and the numerical value of running collection of illustrative plates that this paper sets up.These running collection of illustrative plates, question blank and/or mathematical equations of being stored in the storage able to programme of ECM can help controlling each parameter relevant with carrying out the multi-injection incident rightly, thus reach the best and/or desirable effulent control.
It will also be appreciated that the on-site environmental conditions of engine running possibly influence the amount of the effulent of motor 14 generations.Along with the variation of environmental conditions, the amount of the effulent in the engine exhaust can change.Therefore, for the effulent that keeps motor according to environmental conditions within the threshold value that allows, possibly must dynamically adjust the multiple fuel injection incident.These adjustment can comprise timing and amount of fuel, the timing of main injection and the time-delay between the time-delay between amount of fuel, pilot injection and the main injection and main injection and the follow-up injection of adjusting pilot injection.Can be with the parameters of the various appropriate sensor monitoring of environmental conditions that are connected in ECM58.
Clearly, those skilled in the art that can make various changes and modification to fuel injection system of the present invention.Equally clearly, those skilled in the art that are understanding and are putting into practice the embodiment that can make other in the fuel injection system of the present invention.Therefore, explanation here and example only are exemplary, and real scope of the present invention is decided by appended claim and their equivalent.
Claims (9)
1. fuel injection control systems that is used for motor comprises:
One fuel injection device, it can be operated and can carry out at least once main oil and the follow-up oil of penetrating once penetrated;
One sensor, it can be operated and can experience a fluid pressure that is fed to said fuel injection device and can send a signal of representing said pressure;
Be used for manually receiving the device of the desirable target of operator;
One electronic controller, it and said fuel injection device and said sensor are got in touch, and said electronic controller is configured to:
Can receive one first input device, that represent the desirable target of an operator that is used for manually receiving the desirable target of operator from said;
Can receive one second input of an operating condition of the said motor of representative; And
Can confirm main penetrate oil and a follow-up total amount of fuel, main penetrating oil endurance, a follow-up time-delay and a follow-up endurance of penetrating oil of penetrating oil; Wherein, saidly follow-uply penetrate the oil endurance and penetrate oil based on said master and import with endurance, said follow-up time-delay, said sensor signal, said first input and said second that follow-up total amount of fuel, the said master who penetrates oil penetrates oil.
2. fuel injection control systems as claimed in claim 1 is characterized in that, confirms that the said follow-up oil of penetrating comprises one five dimension of inquiry collection of illustrative plates the endurance.
3. fuel injection control systems as claimed in claim 1 is characterized in that, said controller is configured to also to confirm that a master penetrates oily amount of fuel, and, if said master penetrates oily amount of fuel greater than 12 milliliters, just turn back to a main program to control.
4. fuel injection control systems as claimed in claim 1; It is characterized in that; Said controller is configured to also to confirm that a master penetrates oily amount of fuel; Wherein, as long as determined master penetrates oily amount of fuel less than 12 milliliters, said controller is just penetrated oil according to the master and follow-up total amount of fuel, the said master who penetrates oil penetrates oil endurance, said follow-up time-delay and said sensor signal are confirmed follow-up penetrating the oil endurance.
5. fuel injection control systems as claimed in claim 1; It is characterized in that; Said controller also is configured to and can sends at least one fuel injection device to injection signal, thereby makes said fuel injection device to lead and penetrate oily and the follow-up oil of penetrating with the follow-up mode that " boots state " takes place between the oil of penetrating at the main oil of penetrating.
6. fuel injection control systems as claimed in claim 1 is characterized in that, said controller also be configured to can:
Confirm that a master penetrates oily minimum amount of fuel;
Confirm that a master penetrates oily amount of fuel;
Confirm that one follow-uply penetrates oily amount of fuel;
Penetrating oily amount of fuel and said master to said master penetrates oily minimum amount of fuel and compares; And
As long as penetrating oil mass, said master is less than or equal to the said minimum main oil mass of penetrating; And, just penetrate oil and penetrate oily endurance, said follow-up time-delay and said sensor signal with follow-up total amount of fuel, the said master who penetrates oil and confirm follow-up penetrating the oily endurance according to said master as long as said follow-up to penetrate oily amount of fuel be not zero.
7. fuel injection control systems as claimed in claim 6 is characterized in that, confirms that said master penetrates oily minimum amount of fuel and comprises the collection of illustrative plates of inquiring about in the storage that is stored in said controller.
8. fuel injection control systems as claimed in claim 1 is characterized in that, confirms that said master penetrates the oil endurance and said follow-up time-delay comprises the collection of illustrative plates of inquiring about in the storage that is stored in said controller.
9. fuel injection control systems as claimed in claim 1 is characterized in that, confirms that said master penetrates oil and follow-up total amount of fuel of penetrating oil and comprises exporting to deduct to ignite from the fuel oil of speed regulator and penetrate oily amount of fuel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510138167 CN1995730B (en) | 2005-12-31 | 2005-12-31 | System for controlling supply quantity of multiple fuel injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510138167 CN1995730B (en) | 2005-12-31 | 2005-12-31 | System for controlling supply quantity of multiple fuel injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1995730A CN1995730A (en) | 2007-07-11 |
| CN1995730B true CN1995730B (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510138167 Active CN1995730B (en) | 2005-12-31 | 2005-12-31 | System for controlling supply quantity of multiple fuel injection |
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| Country | Link |
|---|---|
| CN (1) | CN1995730B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6014956A (en) * | 1997-12-22 | 2000-01-18 | Caterpillar Inc. | Electronic control for a hydraulically activated, electronically controlled injector fuel system and method for operating same |
| US6102004A (en) * | 1997-12-19 | 2000-08-15 | Caterpillar, Inc. | Electronic control for a hydraulically activated, electronically controlled injector fuel system and method for operating same |
| US6415762B1 (en) * | 2000-07-13 | 2002-07-09 | Caterpillar Inc. | Accurate deliver of total fuel when two injection events are closely coupled |
-
2005
- 2005-12-31 CN CN 200510138167 patent/CN1995730B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6102004A (en) * | 1997-12-19 | 2000-08-15 | Caterpillar, Inc. | Electronic control for a hydraulically activated, electronically controlled injector fuel system and method for operating same |
| US6014956A (en) * | 1997-12-22 | 2000-01-18 | Caterpillar Inc. | Electronic control for a hydraulically activated, electronically controlled injector fuel system and method for operating same |
| US6415762B1 (en) * | 2000-07-13 | 2002-07-09 | Caterpillar Inc. | Accurate deliver of total fuel when two injection events are closely coupled |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1995730A (en) | 2007-07-11 |
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