CN101356349A - Ejector system for vehicle - Google Patents
Ejector system for vehicle Download PDFInfo
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- CN101356349A CN101356349A CNA2007800013194A CN200780001319A CN101356349A CN 101356349 A CN101356349 A CN 101356349A CN A2007800013194 A CNA2007800013194 A CN A2007800013194A CN 200780001319 A CN200780001319 A CN 200780001319A CN 101356349 A CN101356349 A CN 101356349A
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- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
An ejector system (100) controls the idle speed of an internal combustion engine (50) by controlling an electric throttle valve system (13) that adjusts the flow-rate of the intake air to be supplied to the internal combustion engine (50), and includes an ejector (30) which generates a negative pressure of which the absolute value is larger than the absolute value of a negative pressure to be introduced from an intake manifold (14), a vacuum control valve (IA) which causes the ejector (30) to operate or causes the ejector (30) to stop operating, and an ECU (40A) that controls the vacuum switching valve (IA). With the ejector system (100A), even if the ejector (30) is caused to operate or caused to stop operating, it is possible to appropriately suppress fluctuations in the idle speed, and appropriately obtain a negative pressure.
Description
Technical field
The present invention relates in general to idle speed control unit and the ejector system that is used for vehicle.More specifically, also can suitably suppress the idle speed control unit and the ejector system that are used for vehicle of the fluctuation in the idling even if the present invention relates to make sparger work or it is quit work.
Background technique
Traditionally, use sparger to provide negative pressure to Brake booster, the absolute value of this negative pressure is greater than the absolute value of the negative pressure of drawing from the gas-entered passageway of the gas handling system of internal-combustion engine, wherein said gas-entered passageway provides the connection between atmosphere and each cylinder (hereinafter, will abbreviate " gas handling system of internal-combustion engine " as in suitable part).Described sparger is usually placed in and allows air inlet (inhaled air) to walk around in the bypass passageways of closure, and has the negative pressure of big absolute value by the generation of Venturi effect.Such sparger is documented in the following publication.Japanese Unexamined Patent Publication No JP-2005-69175 (JP-A-2005-69175) has put down in writing a kind of control apparatus of vehicle, it comprises the correcting device that is inhaled into the flow (hereinafter, being become " charge flow rate " sometimes) of the air flows of internal-combustion engine based on the working state correction of sparger.In addition, proposed a kind of technology now, wherein, sparger and IACV (Idle Air Control Valve) together are arranged on and allow air inlet to walk around in the idling pipeline (idle duct) of closure, to form a negative pressure generator.
Japanese Unexamined Patent Publication No 2004-299567 (JP-A-2004-299567) has put down in writing a kind of negative pressure generator, and it has the structure that sparger and IACV (Idle Air Control Valve) are bonded to each other.Japanese Unexamined Patent Publication No 2005-201196 (JP-A-2005-201196) has put down in writing a kind of Negative pressure supply device of vehicle, it forms by arrange the closure that is used for sparger in the bypass passageways of sparger is set, and described closure is fitted on the supporting axle that this closure rotates.
When idling for internal combustion engine, carry out idle speed control usually.In idle speed control, the flow regulator of control such as IACV (Idle Air Control Valve) or closure is with the control idling.Figure 15 is the view that common idle speed control is shown conceptually.Described idle speed control generally includes: thus the feedback control of the fluctuation in the idling of control flow rate controlling device inhibition internal-combustion engine; Thereby the controlling device of control flow rate as a result based on feedback control makes idling maintain the learning control of target velocity; Thereby make target velocity based on the working state of for example air-conditioning and the Correction and Control that changes with the control flow rate controlling device.Under the idle speed control state, by carrying out above-mentioned control, charge flow rate is adjusted to and makes the internal-combustion engine desired required charge flow rate of working under target velocity.Therefore, as shown in Figure 15, when making sparger work in idling for internal combustion engine, charge flow rate increases.Meanwhile, by suppressing the feedback control of the fluctuation in the idling, charge flow rate reduces.In the feedback control of Zhi Hanging, the controlled quentity controlled variable (hereinafter, being called as " feedback control amount " sometimes) that is realized by feedback control reduces and the corresponding reduction value of the increment of charge flow rate (hereinafter, being called as " feedback modifiers amount " sometimes) at this moment.
Figure 13 is the figure that schematically shows when sparger work the time the is flowed through variation that the flow of air inlet of bypass passageways takes place.The cross section that is formed on the passage in the sparger little by little reduces towards the part that produces negative pressure by the Venturi effect.Therefore, when making sparger when work, charge flow rate is not moment ground but increase step by step.As a result, reaching the time that produced between the end value at sparger work and charge flow rate lags behind.Yet Japanese Unexamined Patent Publication No 2005-69175 (JP-A-2005-69175) does not put down in writing the mode that charge flow rate increases.Therefore think that in the control apparatus of the vehicle of putting down in writing, charge flow rate reduces equably by correction when making sparger work in JP-A-2005-69175.That is to say, control apparatus for the vehicle of in JP-A-2005-69175, being put down in writing, although the fluctuation in the charge flow rate is finally suppressed, if revise in this inappropriate moment of charge flow rate instantaneous variation, then charge flow rate may temporarily reduce.
When charge flow rate during, because the delayed response that charge flow rate is detected is difficult to accurately control air fuel ratio probably just in instantaneous variation.On the contrary, for control apparatus according to the vehicle of JP-A-2005-69175, for example, even if make sparger work or it is quit work when engine idle, the charge flow rate that is detected also will be corrected for consistent with the charge flow rate that in fact increases or reduce.Therefore, the trouble that is caused by the delayed response that charge flow rate is detected can be minimized.As a result, can control air fuel ratio more accurately.
Simultaneously, the feedback control in the above-mentioned idle speed control is usually based on differing from and carry out between required charge flow rate and the detected charge flow rate.For example, if the control apparatus correction of the vehicle that detected charge flow rate is put down in writing among the JP-A-2005-69175, also can carry out idle speed control more rightly even if then make sparger work or it is quit work, this is because be minimized by the trouble that delayed response caused that charge flow rate is detected.Yet feedback control is carried out in idle speed control.Therefore, under the situation that charge flow rate is corrected in a particular manner, if make sparger work or it is quit work, then idling may fluctuate owing to described feedback control.In this case, this fluctuation can make the driver produce uncomfortable feeling.
As shown in figure 15, in learning control, the controlled quentity controlled variable that realizes by learning control (below be sometimes referred to as " learning control amount ") reduce or increase and feedback control amount in increment or the corresponding amount of decrement (below be sometimes referred to as " carry out and learn ").Simultaneously, the feedback control amount increases or falls little and decrement or the corresponding amount of increment the learning control amount.Yet when charge flow rate during just in instantaneous variation, described study is not always like that suitably carried out according to expection.Therefore, if even also carry out described study when making sparger work, then the learning control amount may be very little.In this case, when sparger was quit work, charge flow rate significantly reduced, and idling also significantly reduces.In addition, the charge flow rate wretched insufficiency that becomes.In some cases, feedback control can not in time be carried out, and therefore engine stall may take place.
In the negative pressure generator of being put down in writing in each of Japanese Unexamined Patent Publication No 2004-285838 (JP-A-2004-285838) and Japanese Unexamined Patent Publication No 2004-299567 (JP-A-2004-299567), sparger is constructed to produce negative pressure according to the charge flow rate by the idle speed control valve regulation.Therefore, have the negative pressure of big absolute value by the sparger generation if desired, then described structure will cause idling excessively to increase inevitably.In this case, because the negative pressure of drawing from the gas handling system of internal-combustion engine reduces, the negative pressure that is produced by sparger can reduce the corresponding amount of decrement with the negative pressure of drawing from gas handling system.That is to say that because the structure of above-mentioned negative pressure generator, when the absolute value of the negative pressure of drawing from the gas handling system of internal-combustion engine was big, described sparger can not be used effectively.In the Negative pressure supply device of being put down in writing in JP-A-2005-201196, closure can not be controlled independently of one another with the closure that is used for sparger.Therefore think that when the absolute value of the negative pressure of drawing from internal-combustion engine was big, described sparger can not be used effectively.Simultaneously, the amount of the negative pressure that provided by sparger of time per unit is not big especially.Therefore, possibly can't in time obtain required negative pressure.
Summary of the invention
The present invention considers above-mentioned situation and makes.Therefore the invention provides a kind of ejector system that is used for vehicle, even if sparger is started working or it is quit work, this ejector system also can suitably suppress the fluctuation in the idling of internal-combustion engine and can suitably obtain negative pressure.
One aspect of the present invention relates to a kind of ejector system that is used for vehicle, and it comprises: flow regulator, and described flow regulator is regulated charge flow rate, and described charge flow rate is the flow that is supplied to the air inlet of internal-combustion engine; Sparger, described sparger produces negative pressure, and the absolute value of described negative pressure is greater than the absolute value of the negative pressure of drawing from the gas-entered passageway of the gas handling system of described internal-combustion engine; State modifier, described state modifier make described sparger work or described sparger are quit work; And control unit, described control unit is controlled described state modifier, and controls described flow regulator based on the working state of described sparger.
By the above-mentioned ejector system that is used for vehicle, owing to the working state of charge flow rate according to sparger is conditioned, so the fluctuation in the charge flow rate is suppressed.Therefore, can suitably suppress fluctuation in the idling of internal-combustion engine.
At the above-mentioned ejector system that is used for vehicle, described control unit also can comprise idle speed control amount correcting device, described idle speed control amount correcting device sparger reduction value correction idle speed control amount, described idle speed control amount is used in the idle speed control that described flow regulator is carried out, and described sparger reduction value is suitable with the described charge flow rate that increases according to the working state of described state modifier or reduce.
By the above-mentioned ejector system that is used for vehicle, by according to the variation of the working state of state modifier at reasonable time with sparger reduction value correction idle speed control amount, suppressed in the feedback control of revising based on the working state that has changed the fluctuation in the inevitable charge flow rate.Thereby the fluctuation in the idling can suitably be suppressed." described sparger reduction value increase or the described charge flow rate that reduces suitable " with working state according to described state modifier mean described sparger reduction value not with the working state that has changed in charge flow rate corresponding.
At the above-mentioned ejector system that is used for vehicle, described control unit also can comprise specific controlled quentity controlled variable learning device, described specific controlled quentity controlled variable learning device study is used to control the controlled quentity controlled variable of described flow regulator, make when described charge flow rate departs from the amount that is equal to or greater than predetermined value owing to the variation of the working state of described state modifier with the target charge flow rate, if the working state of described state modifier produces new variation, then described charge flow rate is maintained at described target charge flow rate or described charge flow rate is in the wave range of allowing with respect to described target charge flow rate.
Increase or the charge flow rate that reduces (hereinafter, will abbreviate " sparger flow " as) according to the working state of state modifier, because the production error in the sparger and existing between each vehicle ejector system changes in suitable part.Therefore, can check the variation in the sparger flow, and for example the sparger reduction value can be set at and the corresponding value of the intermediate value of described variation.Yet even this variation is in the production range of tolerable variance, if the actual injector flow departs from intermediate value, idling is understood some fluctuation.Along with the deviation increase of sparger flow and intermediate value, it is bigger that the fluctuation in the idling also becomes.In addition, the sparger flow may be because for example by in the inner passage of sparger with wherein be furnished with the accumulation temporary transient variation that sludge caused in the bypass passageways of sparger and reduce.In this case, the actual injector flow may depart from bigger amount with intermediate value.
On the contrary, by the above-mentioned ejector system that is used for vehicle, so that sparger when work, only when departing from the amount that is equal to or greater than predetermined value, charge flow rate and target charge flow rate just carry out the study of controlled quentity controlled variable when the state of a control modifier.Therefore, can promptly the fluctuation in the idling be suppressed in the predetermined permissible range.Therefore, can more suitably suppress fluctuation in the idling.
Of the present invention described aspect in, the study of controlled quentity controlled variable can be by increasing described sparger reduction value or reducing increment in the described feedback control amount or the mode of decrement is carried out.Therefore, represent described sparger reduction value according to the controlled quentity controlled variable that is used for the control flow rate controlling device of aspect of the present invention.Thereby, when described controlled quentity controlled variable is described learning control amount, the minimizing possibility that the study that causes described controlled quentity controlled variable in idle speed control owing to the restriction on the learning control (for example, described learning control amount) of carrying out usually can not appropriately can be carried out.At this moment, for fear of the conflict between the described control, when sparger is worked, can forbid carrying out the study of learning control amount.More specifically, from charge flow rate (for example being set at when being substantially equal to the target charge flow rate when departing from least to charge flow rate and target charge flow rate by feedback control, when the working state of state modifier further changes) between period in, described specific learning control device can be learnt described controlled quentity controlled variable.Thereby, can prevent to cause possibility that described study can not appropriately carry out maybe with this minimizing possibility owing to carry out described study during just in instantaneous variation at charge flow rate.
At the above-mentioned ejector system that is used for vehicle, described control unit also can comprise sparger reduction value modifier, and described sparger reduction value modifier changes described sparger reduction value according to the difference between the pressure of the outlet side of the pressure of the inlet side of described sparger and described sparger.
As shown in figure 16, the sparger flow changes according to above-mentioned pressure difference (hereinafter, will abbreviate " sparger upstream-downstream pressure difference " as).Therefore, in order suitably to suppress the fluctuation in the idling, can change the sparger reduction value based on sparger upstream-downstream pressure difference.This can realize by above-mentioned ejector system.Can change the sparger reduction value based on for example himself sparger upstream-downstream pressure difference.Yet, can be based on changing the sparger reduction value than the easier parameter that detects or estimate of sparger upstream-downstream pressure difference.For example, can be based on changing the sparger reduction value with sparger upstream-downstream pressure difference or from closely-related engine speed of negative pressure and charge flow rate that gas-entered passageway is drawn.
At the above-mentioned ejector system that is used for vehicle, described control unit also can comprise: the controlled quentity controlled variable learning device, described controlled quentity controlled variable learning device study is used in the learning control amount in the learning control that described flow regulator is carried out, and makes described charge flow rate be maintained at the target charge flow rate; With controlled quentity controlled variable study inhibiting apparatus, when described sparger was worked, described controlled quentity controlled variable study inhibiting apparatus forbade learning.
By the above-mentioned ejector system that is used for vehicle because when sparger is worked, forbid learning, therefore, can suppress owing in the idling of learning to cause during just in instantaneous variation at charge flow rate than great fluctuation process.
At the above-mentioned ejector system that is used for vehicle, described control unit also can comprise: feed back control system, and described feed back control system is controlled described flow regulator with feedback system, makes the fluctuation of described charge flow rate be suppressed; With the control rate modifier, described control rate modifier increases described feed back control system is controlled described charge flow rate controlling device with feedback system control rate according to the variation of the working state of described state modifier.
By the above-mentioned ejector system that is used for vehicle, can relax the fluctuation in the charge flow rate apace.Consequently, even if make injection work or it is quit work, also can stablize idling.When charge flow rate during just in instantaneous variation, described control rate can as far as possible promptly change, with the generation that prevents to rock.For example, described control rate can be only changes in predetermined periods apace according to the variation of the working state of state modifier.
At the above-mentioned ejector system that is used for vehicle, described state modifier can be configured to the Flow area of control channel changeably, and described control unit also can comprise the gradual change control gear, described gradual change control gear is little by little controlled described state modifier, makes the described Flow area of described passage little by little increase with predetermined speed or reduces.
By the above-mentioned ejector system that is used for vehicle,, also can suppress the unexpected fluctuation in the charge flow rate even if when making sparger work or it is quit work.Thereby, even have delayed response for the detection of the charge flow rate of instantaneous variation, also can be by with the accurately consistent charge flow rate of actual charge flow rate and easily carry out feedback control in the idle speed control.Therefore, can suppress in the idling than great fluctuation process.By the above-mentioned ejector system that is used for vehicle, because the unexpected fluctuation in the charge flow rate is suppressed, therefore can suppress the generation of the torque shock ends in the internal-combustion engine, and whether just irrelevant with internal-combustion engine in idling.
At the above-mentioned ejector system that is used for vehicle, described control unit also can comprise responsive corrections controlled quentity controlled variable computing device, described responsive corrections controlled quentity controlled variable computing device calculates the responsive corrections controlled quentity controlled variable that is used to control described flow regulator, make and to be controlled so as to when making described sparger work described charge flow rate increase when described state modifier.
By the above-mentioned ejector system that is used for vehicle, when making sparger work, charge flow rate can increase fast by the charge flow rate controlling device.That is to say, when making sparger work, can revise delayed response for the detection of the charge flow rate that increases gradually.Thereby the moment that can be considered to charge flow rate that increases gradually of the charge flow rate that produces when making sparger work increases.Therefore, the described sparger that can use for example conduct to be included in the target of the Correction and Control in the idle speed control is in due course carried out idle speed control more simply.As a result, can more suitably suppress fluctuation in the idling.If sparger is used as the target that is included in the Correction and Control in the idle speed control, then because the execution of feedback control can suitably suppress the fluctuation in the idling.By the above-mentioned ejector system that is used for vehicle, not only when idling for internal combustion engine, and when for example when vehicle quickens, making sparger work, progressively change the instantaneous variation that to think charge flow rate in the charge flow rate.As a result, can revise fuel injection amount more simply in due course, and suitably carry out air fuel ratio control.
At the above-mentioned ejector system that is used for vehicle, described responsive corrections controlled quentity controlled variable computing device can change described responsive corrections controlled quentity controlled variable, makes described charge flow rate little by little reduce.
By the above-mentioned ejector system that is used for vehicle, even actual flow also can continue to be considered to the increase gradually of charge flow rate through the flow of the air inlet of bypass passageways after making sparger work.
At the above-mentioned ejector system that is used for vehicle, described flow regulator can comprise the dead time flow regulator, described dead time flow regulator is regulated described charge flow rate when described idling for internal combustion engine, and described sparger can be disposed in the passage different with the passage that is furnished with described dead time flow regulator.
By the above-mentioned ejector system that is used for vehicle, because negative pressure generator is arranged in the passage different with the passage that is furnished with idle adjusting device, and this negative pressure generator is independent of idle adjusting device and is controlled, therefore, even idling is very low, just, even the negative pressure of drawing from the gas handling system of internal-combustion engine is very high, also can use sparger to obtain negative pressure.
At the above-mentioned ejector system that is used for vehicle, described control unit also can comprise priority control apparatus, when described charge flow rate was adjusted to the required charge flow rate of described internal-combustion engine, described priority control apparatus gave the priority higher to the control of described dead time flow regulator to the control ratio of described state modifier when described idling for internal combustion engine.
At the above-mentioned ejector system that is used for vehicle, give the priority higher to the control of idle adjusting device to the control ratio of state modifier.Therefore, can be by adopting above-mentioned structure and by realizing that by the flow control valve of the Flow area of control channel the state modifier is worked sparger consistently.Therefore, by the above-mentioned ejector system that is used for vehicle, can be with in the trouble that sparger when work produced, and owing to the trouble that in the transition period when obtaining negative pressure the operating lag of the variation of charge flow rate is produced minimizes.
At the above-mentioned ejector system that is used for vehicle, the described state modifier of described priority control apparatus may command, make when the required described charge flow rate of described internal-combustion engine during, make described sparger work greater than the charge flow rate of increase when described state modifier is controlled.
When described state modifier is the valve that switches between runner zone of opening fully, a runner zone that is configured to make passage and the runner zone cut out fully, if described valve is opened fully when the desired value of idling is low, then charge flow rate may be far longer than the required charge flow rate of internal-combustion engine and idling may be too high.On the contrary, by the above-mentioned ejector system that is used for vehicle, can make sparger work more continually not influencing under the situation about keeping of idling.Thereby, can obtain negative pressure in advance.Therefore, can be with in the trouble that sparger when work produced, and owing to the trouble that in the transition period when obtaining negative pressure the operating lag of the variation of charge flow rate is produced minimizes.
At the above-mentioned ejector system that is used for vehicle, the required described charge flow rate of described internal-combustion engine can be that described predetermined control amount need not to respond the variation of described charge flow rate by the represented charge flow rate of predetermined control amount among the controlled quentity controlled variable that is used to control described dead time flow regulator.
The cross section that is formed at the passage of injector interior reduces gradually towards the part that produces negative pressure.Therefore, when making sparger work, charge flow rate increases gradually.That is to say that the air inlet of the sparger of flowing through can not quickly respond to the increase of charge flow rate.Based on this, the represented charge flow rate of controlled quentity controlled variable by the variation that need not to respond charge flow rate, more specifically, the controlled quentity controlled variable of using in the feedback control of the fluctuation that is used for suppressing idling can be regulated with the idle adjusting device of suitably controlling idling by the variation in the rapid processing charge flow rate.By the above-mentioned ejector system that is used for vehicle, can make sparger work more continually not influencing under the situation about keeping of idling.Thereby, can obtain negative pressure in advance.Therefore, can be with in the trouble that sparger when work produced, and owing to the trouble that in the transition period when obtaining negative pressure the operating lag of the variation of charge flow rate is produced minimizes.
The invention provides a kind of ejector system that is used for vehicle, even if carrying out to make sparger work or it is quit work, this ejector system also can suitably suppress the idle speed control of the fluctuation in the idling for internal combustion engine, and carry out suitable air fuel ratio control, and suitably obtain negative pressure.
Description of drawings
Read hereinafter to the detailed description of exemplary embodiment of the present invention in conjunction with the drawings, will understand feature of the present invention and advantage thereof and technical and industrial significance better, in the accompanying drawing:
Fig. 1 is the schematic representation that illustrates according to the ejector system 100A of first embodiment of the invention;
Fig. 2 is the schematic representation that illustrates according to the internal structure of the sparger 30 of first embodiment of the invention;
Fig. 3 is the flow chart that the routine that the ECU 40 according to first embodiment of the invention carries out is shown;
Fig. 4 is the view that the correction of the idle speed control amount among the step S14 of this flow chart is shown conceptually;
Fig. 5 is the flow chart that the routine of carrying out according to the ECU 40B of second embodiment of the invention is shown;
Fig. 6 is the flow chart that the routine of carrying out according to the ECU 40C of third embodiment of the invention is shown;
Fig. 7 is the flow chart that the routine of carrying out according to the ECU 40D of fourth embodiment of the invention is shown;
Fig. 8 is the flow chart that the routine of carrying out according to the ECU 40E of fifth embodiment of the invention is shown;
Fig. 9 be with Fig. 8 in the example of the corresponding time diagram of flow chart;
Figure 10 is the flow chart that the routine of carrying out according to the ECU 40F of sixth embodiment of the invention is shown;
Figure 11 is the flow chart that the routine of carrying out according to the ECU40G of seventh embodiment of the invention is shown;
Figure 12 is the time diagram of variation of working state, responsive corrections controlled quentity controlled variable eqeject and the charge flow rate of schematically illustrated vacuum switch valve 1G, and this time diagram is corresponding with the flow chart of Figure 11;
Figure 13 is schematically illustrated time diagram when sparger work the time the is flowed through variation that the flow of air inlet of bypass passageways takes place;
Figure 14 is the flow chart that the routine of carrying out according to the ECU40H of eighth embodiment of the invention is shown;
Figure 15 is the view that common idle speed control is shown conceptually;
Figure 16 illustrates the plotted curve that concerns between the upstream side of the flow of air inlet of the sparger of flowing through and sparger and the pressure difference between the downstream side.
Embodiment
In below the specification and accompanying drawing, the present invention is described in more detail with reference to exemplary embodiment.
Various details first embodiment.Fig. 1 illustrates the idle speed control unit of being realized by ECU (electronic control unit) 40A according to first embodiment of the invention, and ejector system (hereinafter will abbreviate " ejector system " as) 100A that is used for vehicle.Parts shown in Fig. 1, for example, internal-combustion engine 50 is installed in the vehicle (not shown).The gas handling system 10 of internal-combustion engine 50 comprises air-strainer 11, Air flow meter 12, electronic throttle system 13, intake manifold 14, the suction port that is communicated with each cylinder (not shown) of internal-combustion engine 50, be arranged on pipe for example suction tude 15a and 15b etc. between each parts.Air-strainer 11 is used to filter the air inlet of each cylinder that is supplied to internal-combustion engine 50, and is communicated with atmosphere via the air conduit (not shown).Air flow meter 12 is used to detect charge flow rate, and the signal of the detected charge flow rate of output expression.
Electronic throttle 13 comprises closure 13a, throttle body 13b, valve rod 13c and motor 13d.The aperture of closure 13a can be changed, and is supplied to the flow of whole air inlet of the cylinder of internal-combustion engine 50 with adjusting.As long as can be by regulating charge flow rate such as the closure according to the closure 13a of first embodiment of the invention, the internal-combustion engine of any type can be used as internal-combustion engine 50.According to the first embodiment of the present invention, electronic throttle system 13 is used to regulate charge flow rate, with the idling of controlling combustion engine 50.Electronic throttle system 13 according to first embodiment of the invention is used as flow regulator.Throttle body 13b is formed by pipe, is formed with gas-entered passageway in it.Throttle body 13b supporting is arranged on the valve rod 13c of the closure 13a in the gas-entered passageway.Motor 13d is used for changing the aperture of closure 13a under the control that ECU 40A carries out.Stepping motor is used as motor 13d.Motor 13d is fixed on the described throttle body 13b.The output shaft (not shown) of motor 13d connects with valve rod 13c.The aperture of closure 13a is detected based on a signal that embeds the encoder (not shown) output in the electronic throttle system 13 by ECU 40A.
Preferably adopt the technology that is called as line traffic control throttling (throttle-by-wire) in throttle system, its use actuator drives the closure such as the closure 13a of electronic throttle system 13.Selectively, can adopt via cable for example and work with the mechanical throttle systems of the aperture that changes closure 13a, to substitute electronic throttle system 13 according to the accelerator pedal (not shown).In this case, for example, can form and allow air inlet to walk around the bypass passageways of closure 13a, and the so-called IACV (Idle Air Control Valve) that the runner zone of regulating this bypass passageways can be set in this bypass passageways is as flow regulator, thus the idling of controlling combustion engine 50.Therefore, described IACV (Idle Air Control Valve) can be used as according to flow regulator of the present invention.Intake manifold 14 is used for the gas-entered passageway that the upstream portion branch forms as one is branched into a plurality of parts of each cylinder that is connected to internal-combustion engine 50.Intake manifold 14 is assigned to air inlet in these cylinders.
The internal structure of the schematically illustrated sparger 30 of Fig. 2.Be provided with diffuser (Diffuser, diffuser) 32 in sparger 30 inside.Diffuser 32 comprises that the first tapering part 32a, the second tapering part 32b and negative pressure produce part 32c, and it is the passage that connection is provided between described tapering part 32a and 32b that wherein said negative pressure produces part 32c.The first tapering part 32a opens towards inlet 31a, and the second tapering part 32b opens towards outlet 31b.Negative pressure produces part 32c and is communicated with negative pressure feeding mouth 31c.Be provided with the nozzle 33 that sprays air inlet to the first tapering part 32a at inlet 31a place.The inlet stream of being sprayed by nozzle 33 is through diffuser 32, and flows to air hose 5b through outlet 31b.At this moment, in diffuser 32, produce high-speed jet.Thereby, have the negative pressure of big absolute value by the generation in negative pressure generation part 32c of Venturi effect, and this negative pressure with big absolute value is supplied to negative cavity through air hose 5c from negative pressure feeding mouth 31c.Because the effect of sparger 30, Brake booster 22 has obtained the negative pressure of absolute value greater than the absolute value of the negative pressure of drawing from intake manifold 14.In the inner passage that is formed between negative pressure generation part 32c and the negative pressure feeding mouth 31c, in the inner passage that is formed between outlet 31b and the negative pressure feeding mouth 31c, and be connected at Brake booster 22 on the position of air hose 5c, be provided with the safety check 34 that prevents adverse current.Sparger 30 is not limited to have the sparger of internal structure shown in Figure 2.Also can use sparger to substitute sparger 30 with other internal structure.
Internal-combustion engine 50 is provided with air condition compressor 55.The belt wheel of the live axle of air condition compressor 55 is connected to the belt wheel of the output shaft of internal-combustion engine 50 via band.Except that the belt wheel of air condition compressor 55, the belt wheel of other annex, the belt wheel of the belt wheel of the pump of power steering gear and generator for example also is connected to the belt wheel of the output shaft of internal-combustion engine 50 via band.The live axle of air condition compressor 55 is provided with the clutch (not shown) of Electromagnetic Control.The clutch of this Electromagnetic Control passes through opening/closing air-conditioning switch SW (not shown) and engaged/disengaged under the control that ECU 40 carries out.Thereby, can drive or stop the air condition compressor 55 of air-conditioning.
The ROM stored programme, in the described program with the various processing of carrying out by CPU.According to the first embodiment of the present invention, except that the program that is used for controlling combustion engine 50, ROM also stores and is used to control vacuum switch valve 1A to make sparger 30 work under various conditions or to make sparger 30 out-of-work vacuum switch valve 1A control programs and be used to control electronic throttle system 13 with the idle speed control program of control idling etc.These programs can combine each other.Described idle speed control program comprises that feedback control amount reprogramming, controlled quentity controlled variable learning program, Correction and Control amount increase/subtract program, idle speed control amount computer program and electronic throttle system control program.According to described feedback control amount reprogramming, the based target charge flow rate and based on from the input of Air flow meter 12 output to charge flow rate difference change the feedback control amount so that (hereinafter with the form control electronic throttle system 13 of feedback, be sometimes referred to as " electronic throttle system 13 is carried out feedback control "), make that the fluctuation in the charge flow rate is suppressed.According to described controlled quentity controlled variable learning program, the learning control amount is learnt, so that based on the result of feedback control electronic throttle system 13 is carried out learning control, makes charge flow rate maintain the target charge flow rate.Increase/subtract program according to described Correction and Control amount, the Correction and Control amount of using in the Correction and Control that electronic throttle system 13 is carried out is increased or reduces, and makes the rotating speed of target of internal-combustion engine 50 change based on the working state of for example air-conditioning.According to described idle speed control amount computer program, the idle speed control amount that is used to control electronic throttle system 13 finally is based on feedback control amount, learning control amount and Correction and Control amount and calculates.According to described electronic throttle system control program, electronic throttle system 13 is based on the idle speed control amount that calculated and is controlled.
According to the first embodiment of the present invention, idle speed control amount computer program comprises idle speed control amount revision program.According to described idle speed control amount revision program, based on the working state of vacuum switch valve 1A, use the suitable sparger reduction value of charge flow rate that increases/reduce with variation to revise the idle speed control amount that is used to control electronic throttle system 13 according to the working state of vacuum switch valve 1A.Described sparger reduction value is based on that the suitable charge flow rate that estimates of charge flow rate that increases/reduce with variation according to the working state of vacuum switch valve 1A calculates.According to the first embodiment of the present invention, the Correction and Control amount increases/subtracts program and comprises the sparger correction amount calculation routine.According to described sparger correction amount calculation routine, the working state that the sparger reduction value is based on vacuum switch valve 1A calculates.Described sparger reduction value is considered to one of employed Correction and Control amount in the idle speed control, and is calculated as one of described Correction and Control amount.The described charge flow rate that estimates is set based on the result of the measurement such as bench run in advance, and is stored among the ROM.Preferably, the described charge flow rate that estimates is defined by the arteries and veins spectral data based on the working state of internal-combustion engine 50, and wherein said working state for example is engine speed Ne and throttle opening.Substitute the described charge flow rate that estimates, the sparger reduction value can directly be stored among the ROM.Idle speed control amount correcting device is realized by CPU, ROM, RAM (hereinafter, will be referred to as CPU etc. in due course) with according to the idle speed control amount revision program of first embodiment of the invention.
Idle speed controller is realized with described idle speed control program by CPU etc.Described idle speed controller forms by based on described controlled quentity controlled variable computer program feed back control system, learning control device and Correction and Control device being combined.According to the first embodiment of the present invention, described feed back control system is realized by CPU etc., described feedback control amount reprogramming and described electronic throttle system control program.Described learning control device is realized by CPU etc., described controlled quentity controlled variable learning program and described electronic throttle system control program.Described Correction and Control device increases/subtract program by CPU etc., described reduction value and described electronic throttle system control program is realized.In described feed back control system, learning control device and the Correction and Control device each is all as the part of described idle speed controller and realize.CPU etc. can realize a controlled quentity controlled variable learning device with described controlled quentity controlled variable learning program, as the part of described learning control device.According to the first embodiment of the present invention, ejector system 100A is realized by vacuum switch valve 1A, sparger 30 and ECU 40A.
Next, the routine of carrying out by ECU 40A with reference to the flow chart description shown in Fig. 3 that is used for using sparger reduction value correction idle speed control amount based on the working state of vacuum switch valve 1A.CPU carries out routine in this flow chart, ECU 40A control electronic throttle system 13 thus based on being stored in idle speed control amount revision program among the ROM etc. with quite short gap periods ground.CPU judges whether vacuum switch valve 1A is controlled so that sparger 30 work (hereinafter, will abbreviate " vacuum switch valve 1A opens " as) (step S11).The program that CPU controls vacuum switch valve 1A based on being used to of being carried out by ECU 40A is checked the state of inter-process, judges thus whether vacuum switch valve 1A opens.Yet, judge that the mode whether vacuum switch valve 1A opens is not limited thereto.When vacuum switch valve 1A is provided with the limit switch of the working state that is used to detect vacuum switch valve 1A, can be based on judging from the signal of this limit switch output whether vacuum switch valve 1A opens.
If obtain sure judged result in step S11, then the CPU judgement is opened from vacuum switch valve 1A and whether has been passed through scheduled time T1 (step S12).Described scheduled time T1 is set to the suitable moment of determining to control with the idle speed control amount electronic throttle system 13, and wherein said idle speed control amount is revised with the sparger reduction value based on the charge flow rate that reality increases.If obtain sure judged result in step S12, then CPU calculates and the suitable sparger reduction value (step S13) of charge flow rate that increases.Because be used to revise the idle speed control amount to suppress the increase of charge flow rate, described sparger reduction value is calculated as negative value.Next, CPU comes together to calculate idle speed control amount (step S14) by feedback control amount, learning control amount and Correction and Control amount are added in.According to the first embodiment of the present invention, because the sparger controlled quentity controlled variable is calculated as one of Correction and Control amount, so the sparger reduction value correction of idle speed control amount.Because the sparger reduction value is a negative value, so the idle speed control amount has reduced described sparger reduction value.Fig. 4 conceptually illustrates the correction of the idle speed control amount among the step S14.When vacuum switch valve 1A stayed open, step S11 to S14 periodically carried out, thereby the injected device reduction value of idle speed control amount is revised constantly.On the other hand, if obtain the judged result of negating in step S12, then CPU is set at zero (step S15) with the sparger reduction value.Thereby, after vacuum switch valve 1A opens and in the period before the suitable moment that can control electronic throttle system 13 with the idle speed control amount of injected device reduction value correction, in step S14, calculate the idle speed control amount of not injected device reduction value correction.
On the other hand, if obtain negative judged result in step S11, then CPU judges whether that vacuum switch valve 1A is controlled so that sparger 30 quits work (hereinafter, will abbreviate " vacuum switch valve 1A closes " as).Then, CPU judges whether to close from vacuum switch valve 1A and has passed through scheduled time T2 (step S16).Described scheduled time T2 is set to the suitable moment of determining to control based on the idle speed control amount of the charge flow rate correction that in fact reduces with not injected device reduction value electronic throttle system 13.If obtain sure judged result in step S16, then CPU is set at zero (step S15) with the sparger reduction value.Thereby, in step S14, the correction of the not injected device reduction value of idle speed control amount.On the other hand, if in step S16, obtain negative judged result, then CPU execution in step S14.Thereby, after vacuum switch valve 1A closes and in the period before the suitable moment that can control electronic throttle system 13 with not injected device reduction value based on the idle speed control amount of the charge flow rate correction that in fact reduces, in step S14, calculate the idle speed control amount of injected device reduction value correction.According to the first embodiment of the present invention, the fluctuation in feedback control in the inevitable charge flow rate can be by being suppressed with sparger reduction value correction idle speed control amount.Thereby the fluctuation in the idling can suitably be suppressed.By described structure up to now, even if the ECU 40A that can realize making sparger 30 work or make the fluctuation in its idling that also can suitably suppress internal-combustion engine 50 that quits work.
Next, second embodiment of the present invention will be described.ECU 40A most of according to the ECU40B of second embodiment of the invention and according to first embodiment of the invention is identical, is used for forbidding that except also storing among the ROM of ECU 40B the controlled quentity controlled variable of carrying out study learns to forbid program when the working state based on vacuum switch valve 1B makes sparger 30 work.Although the vacuum switch valve in the second embodiment of the present invention is called as vacuum switch valve 1B for the convenience of describing, vacuum switch valve 1B is identical with vacuum switch valve 1A.According to a second embodiment of the present invention, forbid that with described controlled quentity controlled variable study program has realized controlled quentity controlled variable study inhibiting apparatus by CPU etc.Idle speed control unit according to second embodiment of the invention is realized by ECU 40B.Except that being included in, comprise also that according to second embodiment's idle speed control program described controlled quentity controlled variable study forbids program according to those programs in the idle speed control program of first embodiment of the invention.Except that being included in, also comprise described controlled quentity controlled variable study inhibiting apparatus according to second embodiment's idle speed controller according to those devices in the idle speed controller of first embodiment of the invention.Described controlled quentity controlled variable study forbids that program can be included in the controlled quentity controlled variable learning program, and described controlled quentity controlled variable study inhibiting apparatus can be included in the learning device.According to a second embodiment of the present invention, ejector system 100B is realized by vacuum switch valve 1B, sparger 30 and ECU 40B.Except that ECU 40A, the assembly of vehicle that inside is equipped with ECU 40B is identical with shown in Fig. 1 those.
Describe in detail by ECU 40B being used for of carrying out with reference to flow chart shown in Figure 5 and to judge whether the routine that allows or forbid learning based on the working state of vacuum switch valve 1B.CPU forbids program with the routine shown in quite short this flow chart of gap periods ground execution based on the controlled quentity controlled variable study that is stored among the ROM, and study is allowed to or forbids thus.CPU judges whether vacuum switch valve 1B opens (step S21).If obtain sure judged result, then CPU forbids study (step S22).Thereby, can stop and when the charge flow rate instantaneous variation, carry out study.When vacuum switch valve 1B stays open, can be by periodically execution in step S21 and S22 keep forbidding of study.Thereby, can when sparger 30 work, forbid study, and prevent since sparger 30 working cause the charge flow rate increase state response on the learning control amount.On the other hand, if obtain negative judged result in step S21, then CPU allows study (step S23).Thereby, can carry out study once more.The moment of execution in step S23 can be set in step S21 and to obtain after the negative evaluation result, thereby can not carry out study at charge flow rate during just in instantaneous variation.By described structure up to now, can realize suitably suppressing the ECU 50B in the idling than great fluctuation process by when sparger is worked, forbidding learning.
Next, the third embodiment of the present invention will be described.ECU 40A most of according to the ECU40C of third embodiment of the invention and according to first embodiment of the invention is identical, except also storing the control rate reprogramming of the control rate that is used to increase the feedback control of carrying out according to the variation of the working state of vacuum switch valve 1C among the ROM of ECU 40C.Although the vacuum switch valve in the third embodiment of the invention is called as vacuum switch valve 1C for the convenience of describing, this vacuum switch valve 1C is identical with vacuum switch valve 1A.A third embodiment in accordance with the invention has realized the control rate modifier by CPU etc. and described control rate reprogramming, and has realized the idle speed control unit by ECU 40C.Except that being included in, also comprise described control rate reprogramming according to the 3rd embodiment's idle speed control program according to those programs in the idle speed control program of first embodiment of the invention.Except that being included in, also comprise the control rate modifier according to the 3rd embodiment's idle speed controller according to those devices in the idle speed controller of first embodiment of the invention.Described control rate reprogramming can be included in the feedback control amount reprogramming, and described control rate modifier can be included in the described feed back control system.A third embodiment in accordance with the invention has realized ejector system 100C by vacuum switch valve 1C, sparger 30 and ECU 40B.Except that ECU 40A, the assembly of vehicle that ECU 40C is installed is identical with shown in Fig. 1 those.
Next, describe the routine that increases the control rate of the feedback control of carrying out based on the working state of vacuum switch valve 1C by ECU 40 being used to of carrying out in detail with reference to flow chart shown in Figure 6.CPU carries out the routine shown in this flow chart based on the control rate reprogramming that is stored among the ROM with quite short gap periods ground, increases control rate thus.CPU judges whether vacuum switch valve 1C opens (step S31).In step S31, only judge whether the working state of vacuum switch valve 1C changes, that is to say, only judge whether vacuum switch valve 1C opens.If obtain sure judged result in step S31, then CPU increases control rate (step S32).More specifically, the reduction value (feedback modifiers amount) that is used to change the feedback control amount in calculating increases the gain of the proportional of the equation that is used for calculating the feedback control amount before.Thereby feedback control can change bigger amount.As a result, control rate is increased.
Simultaneously, before calculating the feedback modifiers amount, increase the gain of the integral of the equation that is used for calculating the feedback modifiers amount.Thereby,, the feedback control amount is equated in fact with the object feedback controlled quentity controlled variable even the feedback control amount changes bigger amount.If do not carry out this processing, the gain that then is difficult to make the feedback control amount depend on proportional promptly equates in fact with the object feedback controlled quentity controlled variable.Therefore, a third embodiment in accordance with the invention, this processing is also included within the processing that is used for increasing control rate.Even obtain negative judged result in step S31, CPU is execution in step S32 also.Therefore, even if make sparger 30 work or it is quit work, also can promptly suppress the fluctuation in the charge flow rate, idling can promptly be stablized thus.By described structure up to now, can realize promptly stablizing the ECU 40C of idling by the control rate that increases feedback control, wherein said feedback control is to carry out according to the variation of the working state of vacuum switch valve 1C.
Next, the fourth embodiment of the present invention will be described.Most of identical according to the ejector system 100D that is used for vehicle of fourth embodiment of the invention with ejector system 100A, except comprising the runner zone that is constructed to by control channel, ejector system 100D changes the vacuum switch valve 1D of charge flow rate but not vacuum switch valve 1A, and ejector system 100D comprises ECU 40D but not ECU40A, and described ECU 40D stores the aperture that is used for controlling step by step vacuum switch valve 1D so that increase or reduce the gradual change control program in runner zone of the passage of vacuum switch valve 1D step by step with predetermined speed in ROM.A fourth embodiment in accordance with the invention, except ECU 40D stored described gradual change control program in ROM, ECU 40D was identical with ECU 40A major part.Yet, can adopt the ECU that in ROM, stores any type of described gradual change control program at least.A fourth embodiment in accordance with the invention has realized the gradual change control gear by CPU etc. and described gradual change control program.Ejector system 100D is realized by sparger 30 and ECU 40D.Except that vacuum switch valve 1D and ECU 40D, the assembly of vehicle that ECU 40D is installed in inside is identical with those major parts shown in Fig. 1.
Next, the routine of carrying out by ECU 40D with reference to the flow chart description shown in Fig. 7 that is used for vacuum switch valve 1D being carried out described gradual change control based on the working state of vacuum switch valve 1D.CPU carries out the routine shown in this flow chart based on the gradual change control program of being stored among the ROM with quite short gap periods ground, and ECU 40D carries out gradual change control to vacuum switch valve 1D thus.CPU judges whether vacuum switch valve 1D opens (step S41).If obtain sure judged result,, and calculate interim controlled quentity controlled variable tDUTY (step S42) then by predetermined control amount α being added in the gradual change control that vacuum switch valve 1D is carried out on the employed controlled quentity controlled variable DUTY.Thereby be used to control the controlled quentity controlled variable DUTY that vacuum switch valve 1D closes passage fully and be set to zero, thereby and be used to control the controlled quentity controlled variable DUTY that vacuum switch valve 1D opens passage fully and be set to 100.Next, CPU judges that whether interim controlled quentity controlled variable tDUTY is less than 100 (step S43).If obtain sure judged result, then CPU is updated to interim controlled quentity controlled variable tDUTY (step S44) with controlled quentity controlled variable DUTY.Thereby, periodically execution in step S41, S42, S43 and S44, up to obtain the judged result of negating in step S43, controlled quentity controlled variable DUTY progressively increases controlled quentity controlled variable α at every turn thus.That is to say, can control vacuum switch valve 1D, make the passage of vacuum switch valve 1D open step by step with predetermined speed.On the other hand, if obtain negative judged result in step S43, then CPU is set at 100 (step S45) with controlled quentity controlled variable DUTY.Thereby when vacuum switch valve 1D stayed open, the passage of this vacuum switch valve 1D kept opening fully.
On the other hand, if obtain negative judged result in step S41, then CPU calculates interim controlled quentity controlled variable tDUTY (step S46) by deduct predetermined control amount β from controlled quentity controlled variable DUTY.Next, CPU judges that whether interim controlled quentity controlled variable tDUTY is greater than zero (step S47).If obtain sure judged result, then CPU is updated to interim controlled quentity controlled variable tDUTY with controlled quentity controlled variable DUTY.Thereby, periodically execution in step S41, S46, S47 and S44, up to obtain the judged result of negating in step S47, controlled quentity controlled variable DUTY progressively deducts controlled quentity controlled variable β at every turn thus.Thereby, can control vacuum switch valve 1D, make the passage of vacuum switch valve 1D close step by step with predetermined speed.On the other hand, if obtain negative judged result in step S47, then CPU is set at zero (step S48) with controlled quentity controlled variable DUTY.Thereby when vacuum switch valve 1D kept closing, the passage of this vacuum switch valve 1D kept closing fully.
If vacuum switch valve 1D is carried out described gradual change control, then can suppress the unexpected fluctuation in the charge flow rate.Therefore, by ejector system 100D according to fourth embodiment of the invention, even the delayed response of the detection of given charge flow rate for instantaneous variation also can easily be carried out feedback control in the idle speed control by the charge flow rate that uses and actual charge flow rate is accurately consistent.Therefore, can suppress in the idling than great fluctuation process.By sparger 100D, can suppress the unexpected fluctuation in the charge flow rate according to fourth embodiment of the invention.Therefore, not only when engine idle, and when accelerator pedal is depressed relatively slightly, all can be suppressed in the internal-combustion engine 50 torque shock ends that can be felt by the driver takes place.The specific program of storing among the ROM according to the sparger 100D of fourth embodiment of the invention makes the control mode that can switch vacuum switch valve 1D based on the working state of internal-combustion engine 50.For example, when engine idle or when vehicle only quickens slightly, vacuum switch valve 1D is carried out gradual change control.When vehicle quickens, vacuum switch valve 1D is carried out ON/OFF control under the state that closure is opened fully.By described structure up to now, can realize controlling the ejector system 100D that suppresses in the idling than great fluctuation process by vacuum switch valve 1D is carried out gradual change.
Next, the fifth embodiment of the present invention will be described.ECU 40A most of according to the ECU40E of fifth embodiment of the invention and according to first embodiment of the invention is identical, and difference is among the ROM of ECU 40E except learning to forbid program and specific controlled quentity controlled variable amount learning program according to the controlled quentity controlled variable that also stores the program of first embodiment of the invention described in the second embodiment of the present invention.According to described specific study amount learning program, the controlled quentity controlled variable that is used to control electronic throttle system 13 is learnt, make that charge flow rate is maintained at the target charge flow rate when after the deviation between charge flow rate and the target charge flow rate is equal to or greater than predetermined value when described vacuum switch valve 1E opens vacuum switch valve 1E being closed.Except that ECU 40A, the assembly of vehicle that ECU 40E wherein is installed is identical with shown in Fig. 1 those.Preparation is according to the specific controlled quentity controlled variable learning program of fifth embodiment of the invention, the feasible study of carrying out controlled quentity controlled variable by increment in the feedback control amount that the sparger reduction value is increased or reduce to be produced by feedback control or decrement (feedback modifiers amount), wherein said feedback control is to carry out when the deviation of charge flow rate and target charge flow rate is equal to or greater than predetermined value when vacuum switch valve 1E opens.Prepare described specific controlled quentity controlled variable learning program, make and when making that by described feedback control charge flow rate equals the target charge flow rate in fact, carry out described study.
For example, when the feedback control amount increased, charge flow rate need add the sparger reduction value.Simultaneously, in idle speed control, the idle speed control amount cuts the sparger reduction value.In this case, the study of controlled quentity controlled variable is to carry out by the increment that the sparger reduction value is reduced in the feedback control amount.In addition, according to a fifth embodiment of the invention, described specific controlled quentity controlled variable learning program and described controlled quentity controlled variable learning program are prepared independently of one another.Therefore, ECU 1E also stores controlled quentity controlled variable study and forbids program in ROM, makes when sparger 30 work, can carry out the study of sparger reduction value under the situation of the study of not carrying out the learning control amount.Although the vacuum switch valve in the fifth embodiment of the invention is called as vacuum switch valve 1E for the convenience of describing, this vacuum switch valve 1E is identical with vacuum switch valve 1A.
According to a fifth embodiment of the invention, realized specific controlled quentity controlled variable learning device by CPU etc. with described specific controlled quentity controlled variable learning program; Forbid that with described controlled quentity controlled variable study program has realized controlled quentity controlled variable study inhibiting apparatus by CPU etc.; Realized the idle speed control unit by ECU 40E.According to a fifth embodiment of the invention, the study of described specific controlled quentity controlled variable learning program and described controlled quentity controlled variable forbids that program is included in the described idle speed control program.Therefore, described idle speed controller also comprises described specific controlled quentity controlled variable learning device and described controlled quentity controlled variable study inhibiting apparatus except comprising those devices according to first embodiment of the invention.Realized ejector system 100E by vacuum switch valve 1E, sparger 30 and ECU 40E.Except vacuum switch valve 1E and ECU 40E, the assembly of vehicle that ECU 40E is installed is identical with shown in Fig. 1 those.
Next, the routine of carrying out by ECU 1E with reference to the flow chart description shown in Fig. 8, and will describe in detail with Fig. 8 in the example of the corresponding time diagram shown in Figure 9 of flow chart.CPU is based on being stored in specific controlled quentity controlled variable learning program among the ROM with the routine shown in the flow chart of quite short gap periods ground execution graph 8, ECU 40E control electronic throttle system 13 thus.CPU judges whether vacuum switch valve 1E opens (step S51).If in step S51, obtain negative judged result, the step below then in current routine, not needing to carry out.Therefore, current routine finishes, and step S51 carries out once more.On the other hand, if obtain sure judged result in step S51, then CPU calculates sparger reduction value (A) (step S52).According to a fifth embodiment of the invention, predetermined instant T1 is set to zero.
Then, CPU judges that the feedback modifiers amount is whether greater than+γ (positive predetermined value gamma) or less than-γ (negative predetermined value gamma) (step S53).That is to say, judge whether the depart from objectives amount of charge flow rate of charge flow rate is equal to or greater than predetermined value.According to a fifth embodiment of the invention, described predetermined value gamma is based on respect to the tolerance interval of target charge flow rate and sets.The fluctuation of the charge flow rate in this tolerance interval is can be received.Because idling maintains target velocity under steady state, therefore the feedback modifiers amount when vacuum switch valve 1E opens basically essence be zero.Therefore, be right after after vacuum switch valve 1E opens, in step S53, obtain two negative judged results.In this case, execution in step S55.In step S55, CPU calculates idle speed control amount (step S55).Thereby the idle speed control amount has reduced the sparger reduction value.
In the time diagram of Fig. 9, described up to now processing is corresponding with the variation of Tm1 before the moment.At Tm1 constantly, vacuum switch valve 1E is opened, and the idle speed control amount has reduced the sparger reduction value.At this constantly, engine speed Ne maintains target velocity, and the feedback modifiers amount is zero.
Next, CPU judges whether engine speed Ne equals target velocity (step S56).If as using the sparger reduction value that the idle speed control amount is carried out correction result, charge flow rate becomes and equates with the target charge flow rate, then in step S56, obtain sure judged result.In this case, do not need to carry out following step.Therefore, current routine finishes, and execution in step S51 once more.On the other hand, if the judged result of in step S56, negating, although then be judged to be the correction of the injected device reduction value of idle speed control amount, the charge flow rate air mass flow that still departs from objectives.CPU controls charge flow rate (step S57) in the mode of feedback then, and execution in step S51 once more.When charge flow rate departs from objectives charge flow rate, cpu cycle ground execution in step S51, S52, S53, S55, S56 and S57, any in two judgements making in step S53 is for affirming.
In the time diagram of Fig. 9, it is corresponding that described up to now processing is carved into Tm2 variation constantly with from Tm1 the time.Time diagram shown in Fig. 9 illustrates the variation when charge flow rate departs from objectives charge flow rate a little.Therefore, Tm1 constantly after engine speed Ne be lower than target velocity.Because carry out feedback control subsequently, thus the increase of feedback modifiers amount, and engine speed Ne also increases step by step.
On the other hand, if as the result who carries out charge flow rate control in step S57 in the mode of feedback, the feedback modifiers quantitative change must then obtain sure judged result greater than predetermined value gamma in step S53.At this moment, CPU increases the value A of sparger reduction value or reduces increment or decrement in the feedback control amount, just increases or reduces feedback modifiers amount (B), and the feedback modifiers amount is reset to zero (step S54).That is to say, in step S54, carry out the study of controlled quentity controlled variable, and the value A of sparger reduction value is updated to new value.When charge flow rate equals the target charge flow rate in fact under the feedback control effect, execution in step S54.Therefore, once obtain sure judged result among the step S56 of routine on also will in step S53, judging whether to be close to.If the result of this judgement negates,, also will in step S53, obtain the judged result of negating even then the feedback modifiers amount is greater than predetermined value gamma.
As a result, the sparger reduction value correction that the idle speed control amount has been learnt among the step S55 in current routine and routine subsequently.Therefore, can suppress the fluctuation in the idling when vacuum switch valve 1E is closed.When vacuum switch valve 1E is opened subsequently, in step S52, calculate the sparger reduction value of having upgraded by study.Therefore, also can suppress fluctuation in the idling at this moment.
In the time diagram of Fig. 9, described up to now processing is with corresponding in the Tm2 moment and the variation of Tm3 between the moment.Tm2 illustrates the feedback modifiers quantitative change constantly must be greater than the moment of predetermined value gamma.Tm3 illustrates constantly that the sparger reduction value is learnt and the moment of the injected device reduction value of idle speed control amount correction.
As shown in time diagram, when vacuum switch valve 1E when Tm4 is closed constantly, the idle speed control amount increases and the corresponding amount of sparger reduction value, this is because use the correction of sparger reduction value to be cancelled.At this moment, engine speed Ne does not fluctuate.When the study of sparger reduction value was not performed, if the correction of the idle speed control amount that use sparger reduction value is carried out is cancelled constantly at Tm4, then shown in dotted line, the idle speed control amount further increased and the corresponding amount of feedback modifiers amount.Therefore, when the study of sparger reduction value was not performed, engine speed Ne is shown in dotted line also to be increased, and the fluctuation among the engine speed Ne need be suppressed by feedback control.Therefore, shown in dotted line, the feedback modifiers amount will change.
For the fluctuation in the idling is suppressed in the tolerance interval, for example, can in step S54, make the sparger reduction value increase or reduce predetermined value gamma.This is to make charge flow rate fall in the fluctuation tolerance interval with respect to the target charge flow rate by the specific controlled quentity controlled variable learning program of preparing to be used to learn to be used to control the controlled quentity controlled variable of electronic throttle system 13 to realize, more specifically, according to a fifth embodiment of the invention, if vacuum switch valve 1E is closed after the deviation of charge flow rate and target charge flow rate is equal to or greater than predetermined value when vacuum switch valve 1E opens, then the feedback modifiers amount will increase or reduce predetermined value gamma.At this moment, if in step S53, be judged to be the feedback modifiers amount, then, all will obtain sure judged result regardless of the result of other judgement greater than predetermined value gamma.At this moment, the situation that occurs after vacuum switch valve 1E is opened is different with being right after, the variation that charge flow rate can be not unexpected.Therefore, the possibility that is not appropriately executed of study reduces.By described structure up to now, even if the ECU 40E that can realize making sparger 30 work or make the fluctuation in its rotating speed that also can suitably suppress internal-combustion engine 50 that quits work.
Next, the sixth embodiment of the present invention will be described.Identical according to the ECU40F of sixth embodiment of the invention ECU 40A most of and according to first embodiment of the invention, difference is the sparger correction amount calculation routine except comprising the sparger reduction value reprogramming of will describing according to also comprising the program of first embodiment of the invention hereinafter, and ROM also stores sparger reduction value arteries and veins spectral data except the data described in the storage first embodiment of the invention.Described sparger reduction value reprogramming is used for changing the sparger reduction value based on sparger upstream-downstream pressure difference, described pressure difference be sparger 30 inlet side pressure (for example, be positioned at the pressure of the gas-entered passageway of closure 13a upstream position) with the pressure (for example, the pressure in the intake manifold 14) of the outlet side of sparger 30 between poor.According to a sixth embodiment of the invention, prepared described sparger reduction value reprogramming, make and from sparger reduction value arteries and veins spectral data, to read the sparger reduction value based on engine speed Ne and charge flow rate, and the sparger reduction value can be changed the sparger reduction value for being read out.Therefore, in described sparger reduction value arteries and veins spectral data, the sparger reduction value is based on engine speed Ne and charge flow rate limits.
Except ECU 40A, the assembly of vehicle that inside is equipped with ECU 40F is identical with among Fig. 1 those.Sparger reduction value reprogramming can be stored among the ROM according to the ECU40E of fifth embodiment of the invention.Although the vacuum switch valve in the sixth embodiment of the invention is called as vacuum switch valve 1F for the convenience of describing, this vacuum switch valve 1F is identical with vacuum switch valve 1A.According to a sixth embodiment of the invention, realized sparger reduction value modifier, realized the idle speed control unit by ECU 40F by CPU etc. and described sparger reduction value reprogramming.Described sparger reduction value reprogramming is included in the idle speed control program.Therefore, the idle speed controller according to sixth embodiment of the invention also comprises described sparger reduction value modifier.Realized ejector system 100F by vacuum switch valve 1F, sparger 30 and ECU 40F.Except that vacuum switch valve 1F and ECU 40F, the assembly of vehicle that inside is equipped with ECU 40F is identical with shown in Fig. 1 those.
Next, describe the routine of carrying out by ECU 40F according to sixth embodiment of the invention in detail with reference to Figure 10.Step S51 in the flow chart of step S61 and step S64 to S66 and Fig. 8 is identical respectively with step S55 to S57.Therefore, will in the sixth embodiment of the present invention, describe step S62 and S63 in detail.If in step S61, obtain sure judged result, then CPU detection of engine rotational speed N e and charge flow rate (step S62).According to a sixth embodiment of the invention, predetermined instant T1 is set to zero.Next, CPU reads the sparger reduction value based on detected engine speed Ne and charge flow rate from sparger reduction value arteries and veins spectral data, and the sparger reduction value is changed into the sparger reduction value (step S63) that is read out.Thereby the sparger reduction value changes based on sparger upstream-downstream pressure difference.
As shown in Figure 10, for example, can in step S62, detect or estimate the negative pressure in the intake manifold, rather than detection of engine rotational speed N e and charge flow rate, and can in step S63, change the sparger reduction value based on the negative pressure in the intake manifold.For example, can in ROM, store the sparger reduction value arteries and veins spectral data that limits the sparger reduction value based on the negative pressure in the intake manifold rather than engine speed Ne and charge flow rate.In addition, can prepare sparger reduction value reprogramming, make and from sparger reduction value arteries and veins spectral data, to read the sparger reduction value based on the negative pressure in the intake manifold, and the sparger reduction value be changed the sparger reduction value for being read out.
For example, sparger reduction value can be set to and the flow through corresponding steady state value of peak rate of flow of air inlet of sparger, and the sparger reduction value can multiply by the correction factor that is used to revise this sparger reduction value, can change the sparger reduction value based on sparger upstream-downstream pressure difference thus.Described correction factor can be set at such value, it can multiply each other with the sparger reduction value and described sparger reduction value be changed into and the corresponding value of sparger upstream-downstream pressure difference.For example, the correction factor arteries and veins spectral data that defines described correction factor can substitute sparger reduction value arteries and veins spectral data and is stored among the ROM.Can prepare sparger reduction value reprogramming, make and from correction factor arteries and veins spectral data, to read correction factor based on engine speed Ne and charge flow rate (or the negative pressure in the intake manifold), and the sparger reduction value be multiply by the correction factor that this reads out.By described structure up to now, even if the ECU 40F that can realize making sparger 30 work or make the fluctuation in its idling that also can suitably suppress internal-combustion engine 50 that quits work.
Next, the seventh embodiment of the present invention will be described.According to a seventh embodiment of the invention, responsive corrections controlled quentity controlled variable computer program (hereinafter, abbreviating " computer program " as in suitable part) is stored among the ROM.According to described responsive corrections controlled quentity controlled variable computer program, calculate responsive corrections controlled quentity controlled variable eqeject, it is used to control electronic throttle system 13, make when the controlled so that sparger 30 of vacuum switch valve 1G is worked (hereinafter, abbreviate " vacuum switch valve 1G is opened " as in suitable part), charge flow rate increases.Described responsive corrections controlled quentity controlled variable eqeject is the controlled quentity controlled variable that is used to control electronic throttle 13, and it makes that when vacuum switch valve 1G was opened, charge flow rate increased the corresponding charge flow rate that estimates of final increment with charge flow rate.Described computer program comprises that also being used to change responsive corrections controlled quentity controlled variable eqeject makes the program that charge flow rate reduces gradually.According to this program, responsive corrections controlled quentity controlled variable equject is changed, and makes that charge flow rate reduces gradually along with the flow of actual flow through the air inlet of bypass passageways B increases gradually.
Result based on the test such as pilot plant testing preestablishes the described charge flow rate that estimates, and it is stored among the ROM.The described charge flow rate that estimates is preferably limited by the arteries and veins spectral data based on the working state of internal-combustion engine 50.According to a seventh embodiment of the invention, limit the described charge flow rate that estimates based on engine speed and load by the arteries and veins spectral data.Selectively, the alternative described charge flow rate that estimates of responsive corrections controlled quentity controlled variable eqeject directly is stored among the ROM.In this case, responsive corrections controlled quentity controlled variable equject can read responsive corrections controlled quentity controlled variable eqeject by the working state based on internal-combustion engine 50 and calculates from ROM.According to a seventh embodiment of the invention, various control gear, detection device and judgment means are realized by CPU, ROM and RAM (hereinafter will be referred to as CPU etc.) and above-mentioned various program.Realized responsive corrections controlled quentity controlled variable computing device by CPU etc. with described responsive corrections controlled quentity controlled variable computer program.According to a seventh embodiment of the invention, realized ejector system 100 by vacuum switch valve 1G, sparger 30 and ECU 40G.
Next, describe the routine of carrying out by ECU 40G that is used for when vacuum switch valve 1G is opened, calculates and changing responsive corrections controlled quentity controlled variable eqeject in detail with reference to the flow chart shown in Figure 11.CPU is based on being stored in computer program among the ROM etc. to carry out the routine shown in this flow chart in quite short gap periods ground, and ECU 40G calculates and changes responsive corrections controlled quentity controlled variable eqeject thus.CPU judges vacuum switch valve 1G whether be opened (step S71).The program that CPU controls vacuum switch valve 1G based on being used to of being carried out by ECU 40G is checked the state of inter-process, judges thus whether vacuum switch valve 1G is opened.Selectively, when vacuum switch valve 1G is provided with the limit switch of the working state that for example is used to detect vacuum switch valve 1G, can be based on judging from the signal of this limit switch output whether vacuum switch valve 1G is opened.
If obtain sure judged result, then CPU comes detection of engine rotational speed N e based on the signal from crank angle sensor output, come detection load based on signal, and come calculated response Correction and Control amount eqeject (step S72) based on detected engine speed Ne and load from encoder output.By use the responsive corrections controlled quentity controlled variable eqeject that calculates in the step 72 in the control that electronic throttle system 13 is carried out, the progressively increase of the charge flow rate that causes when vacuum switch valve 1G is opened is considered to the moment increase.Next, CPU changes responsive corrections controlled quentity controlled variable eqeject (step S73).More specifically, according to a seventh embodiment of the invention, calculate the responsive corrections controlled quentity controlled variable eqejectT that makes new advances by reduce current responsive corrections controlled quentity controlled variable eqeject with the equation shown in the step S73, and responsive corrections controlled quentity controlled variable eqeject is updated to described new responsive corrections controlled quentity controlled variable eqejectT, and responsive corrections controlled quentity controlled variable eqeject is changed thus.Selectively, can wait and change responsive corrections controlled quentity controlled variable eqeject with another equation, use arteries and veins spectral data.Next, CPU judges whether that responsive corrections controlled quentity controlled variable eqeject is zero (step S74).If obtain negative judged result in step S74, then CPU re-executes step S73.That is to say that responsive corrections controlled quentity controlled variable eqeject is by periodically repeated execution of steps S73 and S74 and progressively reduce, up to responsive corrections controlled quentity controlled variable equject vanishing.Even actual flow progressively increases through the flow of the air inlet of bypass passageways B after vacuum switch valve 1G is opened, by use the responsive corrections controlled quentity controlled variable eqeject that calculates among the step S73 in the control that electronic throttle system 13 is carried out, the progressively increase of charge flow rate is also continued to think that moment increases.On the other hand, if the judged result that acquisition is negated in step S71, then cpu cycle property ground execution in step S71.If in step S74, obtain sure judged result, execution in step S71 once more then.
Figure 12 is the time diagram of variation of working state, responsive corrections controlled quentity controlled variable eqeject and the charge flow rate of schematically illustrated vacuum switch valve 1G, and it is corresponding with the flow chart among Figure 11.Curve C 1 illustrates the variation in the flow of air inlet of the bypass passageways B that flows through.When vacuum switch valve 1G is opened, in step S72, calculate responsive corrections controlled quentity controlled variable eqeject, this responsive corrections controlled quentity controlled variable eqeject increases thus.Then, by periodic variation responsive corrections controlled quentity controlled variable eqeject in step S73 and S74 responsive corrections controlled quentity controlled variable eqeject is progressively reduced.Responsive corrections controlled quentity controlled variable eqeject is used in the control that electronic throttle system 13 is carried out, and charge flow rate changes shown in curve C 2 thus.Thereby the progressively increase of the charge flow rate that causes when vacuum switch valve 1G is opened is considered to the moment increase.Therefore, for example use sparger 30 to become easier in suitable moment execution idling as the target that is included in the Correction and Control in the idle speed control.As a result, can more suitably suppress fluctuation in the idling.For example, even vacuum switch valve 1G is opened when vehicle quickens, the increase of charge flow rate also will be considered to the moment increase.Therefore, more easily revise fuel injection amount in the suitable moment, this makes can suitably control air fuel ratio.By said structure, can realize a kind of like this ECU 40G, it can carry out idle speed control, air fuel ratio control etc. rightly by the delayed response of the charge flow rate that progressively increases is revised when making sparger 30 work.
Next, the eighth embodiment of the present invention will be described.The idle speed control program comprises idle speed control demand computer program and is used for controlling based on final idle speed control demand eqcal the electronic throttle system control program of electronic throttle system 13.When being controlled so as to, vacuum switch valve 1H makes sparger work (hereinafter, to abbreviate " vacuum switch valve 1H is opened " as) time, according to described idle speed control demand computer program, the corresponding controlled quentity controlled variable eqeject of increment of the charge flow rate that causes when being opened with vacuum switch valve 1H by deducting from common idle speed control amount eqcalb calculates idle speed control demand eqcal.On the other hand, when vacuum switch valve 1H is controlled so as to sparger 30 is quit work (hereinafter, to abbreviate " vacuum switch valve 1H is closed " as) time, according to described idle speed control demand computer program, the idle speed control amount eqcalb that idle speed control demand eqcal can be set at usually the time is consistent.According to the eighth embodiment of the present invention, described idle speed control amount eqcalb when common comprises various controlled quentity controlled variables hereinafter described.
Described idle speed control amount eqcalb when common comprises controlled quentity controlled variable eqg, eqi, eqdlnt, eqsta, eqthw, eqac, eqels, eqcat, eqdln, eqaenst, eqps, eqnd, eqpg, eqvtf and eqaddmax.Each that is included in these controlled quentity controlled variables among the described idle speed control amount eqcalb when common can be a negative value.These controlled quentity controlled variables are calculated according to idle speed control demand computer program, and according to idle speed control demand computer program, and described idle speed control amount eqcalb when common is calculated as these controlled quentity controlled variable sums.Controlled quentity controlled variable eqg is used in the feedback control that electronic throttle system 13 is carried out.Controlled quentity controlled variable eqi is used in the feedback control that electronic throttle system 13 is carried out.Controlled quentity controlled variable eqdlnt is set according to target engine speed.Controlled quentity controlled variable eqsta is used to increase engine speed when internal-combustion engine 50 startings.Controlled quentity controlled variable eqthw is set according to the temperature of freezing mixture.Controlled quentity controlled variable eqac is set according to the load on the air condition compressor 55.Controlled quentity controlled variable eqels is set according to the load on the generator.Controlled quentity controlled variable eqcat is used to increase charge flow rate under catalyzer adds the situation of heat control.Controlled quentity controlled variable eqdln is used to increase charge flow rate at engine speed Ne when reducing owing to disturbing to wait.Controlled quentity controlled variable eqaenst is used to prevent engine stall.
Controlled quentity controlled variable eqps is set according to the load of power steering pump.Controlled quentity controlled variable eqnd is set according to the load that is in the speed changer (not shown) in driving or the non-driving scope.Controlled quentity controlled variable eqpg is used to carry out correction based on the amount of the evaporated fuel that is cleaned.Controlled quentity controlled variable eqvtf is used to carry out when the Variable Valve Time gear (not shown) breaks down and therefore shifted to an earlier date valve timing and revises.Controlled quentity controlled variable eqaddmax is set according to the maximum value of final reference flow.Maximum value when idling promotes reduction value eqdwn and operation when selecting dash-pot reduction value eqdp, deceleration among the reduction value eqcrs is as described controlled quentity controlled variable eqaddmax.In above-mentioned controlled quentity controlled variable, controlled quentity controlled variable eqdlnt, eqsta, eqthw, eqac, eqels, eqcat, eqvtf and eqaddmax do not need to respond the variation of charge flow rate.According to the eighth embodiment of the present invention,, the summation of these controlled quentity controlled variables is calculated as the predetermined control amount eqejeb of the variation that does not need to respond in the charge flow rate according to idle speed control amount computer program.
According to the eighth embodiment of the present invention, the program that is used to control vacuum switch valve 1H comprises the program that is used for opening during greater than controlled quentity controlled variable eqeject at controlled quentity controlled variable eqejeb vacuum switch valve 1H.Controlled quentity controlled variable eqejeb represents the charge flow rate that internal-combustion engine 50 is required.Controlled quentity controlled variable eqeject represents the charge flow rate of increase when vacuum switch valve 1H is opened.According to the eighth embodiment of the present invention, various control gear, detection device and judgment means are realized by CPU, ROM and RAM (hereinafter will abbreviate CPU etc. as) and various program.Especially, by CPU etc. and the program that is used to control vacuum switch valve 1H realized priority control apparatus.According to the eighth embodiment of the present invention, realized negative pressure generator 100H by vacuum switch valve 1H and sparger 30.
Next, describe the routine of carrying out by ECU 40H that is used to control vacuum switch valve 1H in detail with reference to the flow chart shown in Figure 14.CPU controls the program of vacuum switch valve 1H and idle speed control demand computer program etc. and carries out the routine shown in this flow chart with quite short gap periods ground based on being stored in being used among the ROM, thus ECU 40H control negative pressure generator 100H.PCU compute control amount eqejeb (step S81).Next, CPU comes detection of engine rotational speed N e based on the signal from crank angle sensor output, comes detection load based on the signal from encoder output, and comes compute control amount eqeject (step S82) based on detected engine speed Ne and load.According to the eighth embodiment of the present invention, indication is stored among the ROM based on the arteries and veins spectral data of the charge flow rate that estimates of engine speed Ne and load qualification.Calculate controlled quentity controlled variable eqeject based on the described charge flow rate that estimates.The described charge flow rate that estimates is the estimated value of the charge flow rate that increases when vacuum switch valve 1H is opened, and it is preestablished based on the result of the test such as pilot plant testing.Selectively, the alternative described charge flow rate that estimates of controlled quentity controlled variable eqeject directly is stored among the ROM.
Next, CPU judge whether the negative pressure request of obtaining has been issued or controlled quentity controlled variable eqejeb whether greater than controlled quentity controlled variable eqeject (step S83).That is to say, judge that in step S83 negative pressure obtains request and whether be issued, though whether under the situation that makes sparger 30 work idling also kept, and whether might suitably control idling.For example, the negative pressure in the negative cavity of Brake booster 22 does not satisfy reference value or pumping action break (pumping brake) when being loaded, and sends negative pressure and obtains request.Even when the negative pressure request of obtaining is not issued, if obtain sure judged result in step S83, then CPU opens vacuum switch valve 1H (step S84).Thereby sparger 30 is by more frequent operation.If vacuum switch valve 1H is opened, then step S84 can be skipped.Next, CPU comes compute control amount eqcal (step S85) by deduct controlled quentity controlled variable eqeject from controlled quentity controlled variable eqcalb.Control electronic throttle system 13 based on the controlled quentity controlled variable eqcal that in step S85, calculates.That is to say,, after vacuum switch valve 1H is opened, control electronic throttle system 13 in step S84 based on the controlled quentity controlled variable eqcal that in step S85, calculates according to the eighth embodiment of the present invention.Thereby before opening the closure 13a of electronic throttle system 13, vacuum switch valve 1H is opened.
If obtain negative judged result in step S83, then CPU closes vacuum switch valve 1H (step S86), and makes controlled quentity controlled variable eqcalb consistent with controlled quentity controlled variable eqcal (step S87).Thereby, can avoid work owing to sparger 30 to cause keeping of idling to be affected or the control of idling inappropriate situation that becomes.In this case, vacuum switch valve 1H does not contribute to the adjustment of charge flow rate, and the adjustment of charge flow rate is only regulated by electronic throttle system 13.That is to say,, then will give the higher priority of control of the control ratio vacuum switch valve 1H of electronic throttle system 13 if in step S83, obtain negative judged result.If be judged to be in step S83 and sent negative pressure and obtain request, then vacuum switch valve 1H is opened in step S83, and does not consider that whether controlled quentity controlled variable eqejeb is greater than controlled quentity controlled variable eqeject.Thereby, for example obtain on the viewpoint of enough braking abilities and see improving Security, can suitably make sparger 30 work as required.By above-mentioned structure, can realize a kind of like this ECU 40H, it can use priority sparger 30 to obtain negative pressure, and by making sparger 30 work more continually, makes the inconvenience that causes owing to the operating lag that in obtaining the transition period of negative pressure charge flow rate is changed minimize.
Though described the present invention with reference to exemplary embodiment of the present invention, should be appreciated that the present invention is not limited to these exemplary embodiments.On the contrary, the invention is intended to contain various modifications and the equivalent arrangements that falls within the scope of the present invention.
Claims (13)
1. ejector system (100A to 100H) that is used for vehicle is characterized in that comprising:
Flow regulator (13), described flow regulator is regulated charge flow rate, and described charge flow rate is the flow that is supplied to the air inlet of internal-combustion engine (50);
Sparger (30), described sparger produces negative pressure, and the absolute value of described negative pressure is greater than the absolute value of the negative pressure of drawing from the gas-entered passageway (14) of the gas handling system of described internal-combustion engine (50);
State modifier (1A to 1H), described state modifier are worked described sparger (30) or described sparger (30) are quit work; With
Control unit (40A to 40H), described control unit is controlled described state modifier (1A to 1H), and controls described flow regulator (13) based on the working state of described sparger.
The ejector system that is used for vehicle 2. according to claim 1 (100A, 100E 100F), is characterized in that:
Described control unit (40A, 40E, 40F) also comprise idle speed control amount correcting device, described idle speed control amount correcting device sparger reduction value correction idle speed control amount, described idle speed control amount is used in the idle speed control that described flow regulator (13) is carried out, described sparger reduction value with according to described state modifier (1A, 1E, working state 1F) and increase or the described charge flow rate that reduces suitable.
3. the ejector system (100E) that is used for vehicle according to claim 2 is characterized in that:
Described control unit (40E) also comprises specific controlled quentity controlled variable learning device, described specific controlled quentity controlled variable learning device study is used to control the controlled quentity controlled variable of described flow regulator (13), make when described charge flow rate departs from the amount that is equal to or greater than predetermined value owing to the variation of the working state of described state modifier (1E) with the target charge flow rate, if the working state of described state modifier (1E) produces new variation, then described charge flow rate is maintained at described target charge flow rate or described charge flow rate is in the wave range of allowing with respect to described target charge flow rate.
4. the ejector system (100F) that is used for vehicle according to claim 2 is characterized in that:
Described control unit (40F) also comprises sparger reduction value modifier, and described sparger reduction value modifier changes described sparger reduction value according to the difference between the pressure of the outlet side of the pressure of the inlet side of described sparger (30) and described sparger (30).
5. the ejector system (100B) that is used for vehicle according to claim 1 is characterized in that:
Described control unit (40B) also comprises: the controlled quentity controlled variable learning device, and described controlled quentity controlled variable learning device study is used in the learning control amount in the learning control that described flow regulator (13) is carried out, and makes described charge flow rate be maintained at the target charge flow rate; With controlled quentity controlled variable study inhibiting apparatus, when described sparger (30) was worked, described controlled quentity controlled variable study inhibiting apparatus forbade learning.
6. the ejector system (100C) that is used for vehicle according to claim 1 is characterized in that:
Described control unit (40C) also comprises: feed back control system, and described feed back control system is controlled described flow regulator (13) with feedback system, makes the fluctuation of described charge flow rate be suppressed; With the control rate modifier, described control rate modifier increases described feed back control system is controlled described charge flow rate controlling device (13) with feedback system control rate according to the variation of the working state of described state modifier (1C).
7. the ejector system (100D) that is used for vehicle according to claim 1 is characterized in that:
Described state modifier is configured to the Flow area of control channel changeably, and described control unit (40D) also comprises the gradual change control gear, described gradual change control gear is little by little controlled described state modifier (1D), makes the described Flow area of described passage little by little increase with predetermined speed or reduces.
8. the ejector system (100G) that is used for vehicle according to claim 1 is characterized in that:
Described control unit (40G) also comprises responsive corrections controlled quentity controlled variable computing device, described responsive corrections controlled quentity controlled variable computing device calculates the responsive corrections controlled quentity controlled variable that is used to control described flow regulator (13), make and to be controlled so as to when making described sparger (30) work described charge flow rate increase when described state modifier (1G).
9. the ejector system (100G) that is used for vehicle according to claim 8 is characterized in that:
Described responsive corrections controlled quentity controlled variable computing device changes described responsive corrections controlled quentity controlled variable, makes described charge flow rate little by little reduce.
10. the ejector system (100H) that is used for vehicle according to claim 1 is characterized in that:
Described flow regulator (13) comprises dead time flow regulator (13), described dead time flow regulator is regulated described charge flow rate when described internal-combustion engine (50) idling, and described sparger is disposed in the passage different with the passage that is furnished with described dead time flow regulator.
11. the ejector system (100H) that is used for vehicle according to claim 10 is characterized in that:
Described control unit (40H) also comprises priority control apparatus, when described charge flow rate was adjusted to the required charge flow rate of described internal-combustion engine (50), described priority control apparatus gave the control ratio of described state modifier (1H) the higher priority of control to described dead time flow regulator (13) when described internal-combustion engine (50) idling.
12. the ejector system (100H) that is used for vehicle according to claim 11 is characterized in that:
Described priority control apparatus is controlled described state modifier (1H), makes when the required described charge flow rate of described internal-combustion engine (50) during greater than the charge flow rate that increases when described state modifier is controlled, and described sparger (30) is worked.
13., it is characterized in that according to claim 11 or the 12 described ejector systems (100H) that are used for vehicle:
The required described charge flow rate of described internal-combustion engine (50) is that described predetermined control amount need not to respond the variation of described charge flow rate by the represented charge flow rate of predetermined control amount among the controlled quentity controlled variable that is used to control described dead time flow regulator (13).
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006131826 | 2006-05-10 | ||
| JP131826/2006 | 2006-05-10 | ||
| JP139416/2006 | 2006-05-18 | ||
| JP157275/2006 | 2006-06-06 | ||
| JP095016/2007 | 2007-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101356349A true CN101356349A (en) | 2009-01-28 |
Family
ID=40308464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800013194A Pending CN101356349A (en) | 2006-05-10 | 2007-05-09 | Ejector system for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101356349A (en) |
-
2007
- 2007-05-09 CN CNA2007800013194A patent/CN101356349A/en active Pending
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