CN1975141A - Fuel jet device of engine - Google Patents
Fuel jet device of engine Download PDFInfo
- Publication number
- CN1975141A CN1975141A CN 200610128527 CN200610128527A CN1975141A CN 1975141 A CN1975141 A CN 1975141A CN 200610128527 CN200610128527 CN 200610128527 CN 200610128527 A CN200610128527 A CN 200610128527A CN 1975141 A CN1975141 A CN 1975141A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic coil
- current
- fuel injection
- motor
- electrical current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y02T10/126—
Abstract
The invention provides a fuel injection device for engine which can detect the current on the electromagnetic winding in high precision so as to achieve the high precision of the control of the fuel injection module by arranged a biasing circuit on the detecting member for the electromagnetic winding current. The device comprises: a fuel injection module with functions that can drive a plunger to move forward and backward so as to suck the fuel or increase pressure to inject fuel when the electromagnetic winding 9 is electrified, and several sensors 20 for detecting the running state of the engine, and a control unit constituted by a micro-computer 2 for generating a driving signal to the fuel injection module according to the running state, and a current detecting member containing an operation amplifier 8 for detecting the electromagnetic winding current. The biasing current supplied by the biasing source 15 flow through the current detecting member firstly to stabilize the current value before electrified so as to achieve the high precision of the current detecting of the fuel injection module.
Description
Technical field
The present invention relates to have the fuel injection system of the motor of the function of the pressurized fuel that moves back and forth that utilizes plunger and Fuelinjection nozzle function, for example the new technology of the motor fuel of relevant two-wheel vehicle control usefulness.
Background technique
Always, the known energy that utilizes capacitor stores drives the engine fuel injection device (for example with reference to Patent Document 1) of electromagnetic coil (solenoidal) pattern.
In the fuel injection system of this motor, the transistor that drives electromagnetic coil is by microcomputer control carrying out switch, and the induction electromotive force that electromagnetic coil takes place when transistor ends charges to capacitor.
After solenoid current is transformed to voltage, amplify the input microcomputer through operational amplifier.In addition, (when transistor ends) also imports microcomputer when the non-excitation of electromagnetic coil.
, inner member such as microcomputer, the operational amplifier etc. of the control gear that drives at the battery supply (DC electrical source) with two-wheel vehicle etc. use with the DC electrical source of battery negative supply as benchmark.
Here, solenoid current is transformed to utilizes that general operational amplifier amplifies behind the voltage, in the situation of input microcomputer, output battery negative supply (0V) is difficult when the non-excitation of solenoid current, perhaps, may export unsettled voltage.
On the other hand, as when using exportable operational amplifier near battery negative supply (0V) voltage, just will be with the parts of high price, and in this case, it also is difficult exporting 0V reliably.
In addition, in the above-mentioned Patent Document 1 described device in the past, the voltage of charging capacitor is then through divider resistance input microcomputer, and the condenser voltage of microcomputer after according to dividing potential drop, the transistor of the driving usefulness of control electromagnetic coil make the current"on"time of correction to electromagnetic coil.
On the other hand, the correction accuracy for the driving time that improves electromagnetic coil has also proposed the mensuration condenser voltage, detects the energy of capacitor stores, detects the electrical current of electromagnetic coil simultaneously, proofreaies and correct the scheme that the fuel of driving time sprays module.
But,, the electrostatic capacity, internal driving etc. of capacitor are changed, even therefore measure the driving time that the voltage of capacitor can not correctly be proofreaied and correct electromagnetic coil owing to capacitor performance such as temperature characteristic, reason such as deterioration, solid error year in year out.
Test according to the present application person learns that when current detection value deviation 1%, fuel injection amount changes 3%.In addition, the current detection accuracy of the current detection circuit in the control unit, the high precision part that promptly uses automobile to use, also about 3%, at this moment, it also is 9% that fuel injection amount changes to boundary, the desirable fuel accuracy of spray that as seen can not obtain.
[Patent Document 1] spy opens the 2003-336537 communique
Under the situation of the fuel injection system of motor in the past with the general-purpose operation amplifier, the problem of existence is when not flowing through solenoid current, can not export battery negative supply (0V), or export unsettled voltage.
In addition, when using exportable operational amplifier near battery negative supply (0V) voltage, problem is to cause the rising of cost, and is difficult to correctly export 0V, therefore can not get desirable fuel accuracy of spray at last.
Be again, though proposed the mensuration capacitance voltage, detect the energy of capacitor stores, detect the electrical current of electromagnetic coil simultaneously, proofread and correct the technological scheme of driving time, but because various deteriorations, error cause the electrostatic capacitance amount of capacitor, the change of internal driving, even so problem be to measure the driving time that condenser voltage can not correctly be proofreaied and correct electromagnetic coil.
The present invention does for addressing the above problem, its purpose is not influence the bias current of control by the detection part of solenoid current is switched in advance, the output of the operational amplifier before the compensation electromagnetic coil electricity, thus obtain making the fuel injection system of the stable motor of the output of the operational amplifier before the electromagnetic coil energising.
Again, the objective of the invention is to the value measured before the electromagnetic coil energising by deducting, obtain to measure the fuel injection system of the motor of correct electromagnetic coil electrical current from electromagnetic coil electrical current value.
Again, the objective of the invention is to by after electromagnetic coil consumption capacitor institute stored energy, measuring the 1st electrical current of electromagnetic coil immediately, and then through measuring the 2nd electrical current of electromagnetic coil behind the certain hour, thereby obtain seeking the high precision int that fuel sprays module, the fuel injection system of realizing the motor of correct air fuel ratio control.
The objective of the invention is to by repeatedly carrying out the detection number of times of the 2nd electrical current, the fuel injection system of the motor that accomplished more accurate air fuel ratio is controlled again.
Summary of the invention
The fuel injection system of motor of the present invention comprises: have electromagnetic coil and plunger, the moving back and forth of the plunger that produces when electromagnetic coil is switched on attracts and pressurize fuel, and to the fuel injection module of engine spray; The various sensors of the operating condition of detection of engine; According to operating condition fuel is sprayed the control unit that module provides drive signal; Drive/stop the drive control component of electromagnetic coil; Be stored in the capacitor of the electromagnetic coil induction electromotive force that electromagnetic coil takes place when stopping; When the driving of electromagnetic coil, emit and pass on the energy reception and registration parts of the energy of capacitor stores; Detect the current detecting part of the electrical current of electromagnetic coil; And the injection correcting unit that sprays the driving time of module according to the electrical current checkout value correction fuel of electromagnetic coil, wherein, also comprise the bias circuitry that is connected in current detecting part, current detecting part is according to the electrical current checkout value, by detecting electromagnetic coil energising current value before, calculating is flow through predetermined bias current from bias circuitry simultaneously to the current value before and after the energising of electromagnetic coil, thereby the preceding current value of energising of described electromagnetic coil is stablized.
Again, the fuel injection system of motor of the present invention comprises: have electromagnetic coil and plunger, the moving back and forth of the plunger that produces when electromagnetic coil is switched on attracts and pressurize fuel, and to the fuel injection module of engine spray; The various sensors of the operating condition of detection of engine; According to operating condition fuel is sprayed the control unit that module provides drive signal; Drive/stop the drive control component of electromagnetic coil; Be stored in electromagnetic coil when stopping, the capacitor of the induction electromotive force that electromagnetic coil takes place; When the driving of electromagnetic coil, emit and pass on the energy reception and registration parts of the energy of capacitor stores; Detect the current detecting part of the electrical current of electromagnetic coil; And the injection correcting unit of proofreading and correct the driving time of electromagnetic coil according to the electrical current checkout value of electromagnetic coil, wherein, current detecting part comprises the detection electromagnetic coil and consumes the energy of described capacitor stores, the discharge detection of end parts that the rechargeable energy discharge of capacitor finishes, after being consumed, the energy of capacitor detects the 1st electrical current value of electromagnetic coil immediately, detecting the 1st electrical current value after behind the certain hour simultaneously, detect the 2nd electrical current value of electromagnetic coil, spray correcting unit according to the energy of the 1st and the 2nd electrical current value detection, simultaneously according to the energy correction driving time to electromagnetic coil.The effect of invention
According to the present invention, then by bias current that the detection part of solenoid current is switched in advance, the output of the operational amplifier before the compensation electromagnetic coil electricity, make the output of the preceding operational amplifier of electromagnetic coil energising stable, thereby can improve the testing precision of solenoid current, realize high-precision fuel control simultaneously.
Again, according to the present invention, detect solenoid current immediately with through behind the certain hour after then finishing by rechargeable energy discharge at capacitor, differentiation is to the energy (power supply status) of electromagnetic coil, driving time according to the energy correction electromagnetic coil, thereby can improve the control accuracy that fuel sprays module, realize high-precision fuel control.
Description of drawings
Fig. 1 illustrates the engine fuel injection manipulated or operated apparatus of example 1 of the present invention.
Fig. 2 illustrates the engine fuel injection manipulated or operated apparatus of example 2 of the present invention.
Fig. 3 is the sequential chart of the action usefulness of explanation the invention process form 2.
Label declaration
1 capacitor, 2 microcomputers (control unit), 3 diodes, 4 transistors
5 resistance, 8 operational amplifiers, 9 electromagnetic coils, 10 transistors
13 batteries, 14 resistance, 15 bias supplies, 16 voltage comparators
20 various sensor τ certain hours
Embodiment
Example 1
Fig. 1 illustrates the circuit diagram of fuel injection system of the motor of example 1 of the present invention.
Device shown in Figure 1, comprise: the capacitor 1 of an end ground connection, microcomputer 2 with CPU and various memory members, negative electrode is received the diode 3 of the other end of capacitor, and output terminal (collector electrode) connects the transistor 4 of the anode of diode 3, resistance 5～7,12,14, detect the operational amplifier 8 of the solenoid current that flows through by transistor 4, the electromagnetic coil 9 of switching on/stopping by transistor 4.
The device of Fig. 1 also comprises: the transistor 10 between an end of insertion electromagnetic coil 9 and the negative electrode of diode 3, negative electrode connects the diode 11 of an end of electromagnetic coil 9, insert the anode and the battery between the ground 13 of diode 11, the bias supply of forming by the fixed power source of the in-phase input end (+) that is connected to operational amplifier 8 15, and for example detect two-wheel vehicle motor (not shown) operating condition and import the various sensors 20 of microcomputer 2.
The contact of transistor 4 and resistance 5 is connected to the in-phase input end (+) of operational amplifier 8.
The both end voltage (checkout value of solenoid current) of the resistance 5 of operational amplifier 8 outputs is imported into microcomputer 2.
Electromagnetic coil 9 has plunger (not shown), constitutes fuel with transistor 4 and sprays module.
Moving back and forth of the plunger that electromagnetic coil 9 (fuel injection module) takes place when utilizing electromagnetic coil 9 energisings attracts and pressurized fuel, and is ejected into motor.
In addition, microcomputer 2 is just used from the electrical current value of electromagnetic coil 9 and is deducted value to the current detection value before the energising of electromagnetic coil 9, as final electrical current checkout value.
Like this, flow through bias current in advance, just make the preceding current value stabilization of electromagnetic coil energising by 15 pairs of resistance 5 that constitute current detecting part of bias supply.
Secondly, the action of the device of example of the present invention 1 shown in Figure 1 is described.
At first, under the control of microcomputer 2, when the transistor 4 of fuel injection module driving usefulness is switched on, electromagnetic coil 9 energisings, plunger is attracted.
At this moment, after the solenoid current that flows through electromagnetic coil 9 utilizes resistance 5 to be transformed to voltage, amplify by operational amplifier 8 and the resistance 6,7 that amplifies usefulness, as being input to microcomputer 2 by the solenoid current value of voltage amplification.
In addition, end, do not have electric current to flow through in the state of electromagnetic coil 9, also import microcomputer by the solenoid current checkout value of operational amplifier 8, resistance 6,7 voltage amplifications at transistor 4.
Like this, microcomputer 2 is by the value before and after the energising of calculating electromagnetic coil 9, the current"on"time of just proofreading and correct electromagnetic coil 9, oxide-semiconductor control transistors 4.
Be cut off behind the electric current between 4 pairs of electromagnetic coils of transistor 9 are supplied with in case of necessity.
Transistor 4 by the time, induction electromotive forces take place from the stopped electromagnetic coil 9 of (demagnetization) of "on" position, induction electromotive force is by 1 charging of 3 pairs of capacitors of diode.The regenerative current of the electromagnetic coil 9 that takes place when at this moment, diode 3 formations are ended transistor 4 stores the path of capacitor 1 into.
In addition, microcomputer 2 for the induction electric potential energy free of losses of electromagnetic coil 9 store capacitor 1 into, the transistor 10 of connecting with electromagnetic coil 9 is ended.
By at transistor 4 by preceding off transistor 10, the induction electric potential energy that takes place during electromagnetic coil 9 cutout is not consumed by electromagnetic coil 9 again and deposits capacitor 1 in.
Like this, by current flowing resistance 5 before the energising of electromagnetic coil 9, the output value of operational amplifier (current detection value of energising before the energising electromagnetic coil 9) is the magnitude of voltage that is higher than the negative supply (being the negative supply of operational amplifier 8) of battery 13.
In addition, because of bias supply 15 is made of fixed power source, so can apply stable bias voltage, so, operational amplifier 8 can be exported more stable current detection value.
At this moment, the negative supply of battery 13 is DC power supplys of OV benchmark, and the power supply of operational amplifier 8 can use the power supply identical with vehicle mounted battery power (the DC power supply of OV benchmark) to constitute.
In addition, during solenoid current before detecting electromagnetic coil 9 energisings, wish the electric current before detecting electromagnetic coil 9 as far as possible will switch on.
Why will be like this, being that the conducting dutycycle of electromagnetic coil 9 uprises because for example motor is when high speed rotating, is near electromagnetic coil 9 cutout backs because induction electromotive force takes place electromagnetic coil 9, so, just be difficult to make the output of operational amplifier 8 stable if not before will switching on.
But, as bias current, be necessary to set the little value of the degree of the current detecting that do not influence electromagnetic coil 9 and Current Control, therefore set suitable value according to the offset voltage of operational amplifier 8.
Secondly, microcomputer 2 is after driving electromagnetic coil 9, through detecting the current value of electromagnetic coil 9 behind certain certain hour.
As mentioned above, the fuel injection system of the motor of example 1 of the present invention comprises: the attraction fuel that moves back and forth of the plunger that takes place when utilizing electromagnetic coil 9 energisings, pressurization also is ejected into the electromagnetic coil 9 (fuel injection module) of motor, the various sensors 20 of the operating condition of detection of engine, according to operating condition fuel is sprayed the microcomputer 2 (control unit) that module provides drive signal, the transistor 4 (drive control component) that makes electromagnetic coil 9 drive/stop, be stored in the capacitor 1 of the induction electromotive force that electromagnetic coil 9 takes place by electromagnetic coil 9 when stopping, when driving, electromagnetic coil 9 emits and passes on the transistor 10 (energy reception and registration parts) of the energy that capacitor 1 stored, detect the resistance 5 and the operational amplifier 8 (current detecting part) of the electrical current of electromagnetic coil 9, proofread and correct the injection correcting unit of the driving time of electromagnetic coil 9 (fuel injection module) and the bias supply 15 that is connected in resistance 5 and operational amplifier 8 (current detecting part) according to the electrical current checkout value of electromagnetic coil 9.
Constitute the operational amplifier 8 of current detecting part,, measure electromagnetic coil 9 energisings current value before according to the electrical current checkout value.
In addition, constitute the microcomputer 2 of current detecting part relatedly, calculate the current value before and after the energising of electromagnetic coil 9 with operational amplifier 8.
In addition, constitute the resistance 5 and the operational amplifier 8 of current detecting part,, the preceding current value of energising of electromagnetic coil 9 is stablized by flowing through bias current in advance from bias supply 15.
Like this, by the current detecting part to electromagnetic coil 9 bias circuitry is set, the energy highi degree of accuracy detects the electrical current of electromagnetic coil 9, makes fuel spray the control high precision int of module.
In other words, by resistance 5 (current detecting part) is flow through bias current, can obtain before electromagnetic coil 9 energisings reliably and the current detection value in the energising, make the control high precision int of electromagnetic coil 9, can obtain the fuel injection system of the high motor of fuel control accuracy.
In addition, as the power supply of operational amplifier 8,, can constitute with the inexpensive parts of bias circuitry, so can obtain the fuel injection system of cheap motor because the DC power supply of available identical OV benchmark with vehicle mounted battery power moves.
In addition, constitute the microcomputer 2 of current detecting part, by deduct the value of the preceding current detection value of energising with electrical current checkout value from electromagnetic coil 9, as final electrical current checkout value, can obtain reliable and correct electrical current checkout value, correct drive controlling electromagnetic coil 9 realizes that the high fuel of reliability sprays.
And, when the current detection value that deducts before switching on, compensated by flowing through the bias current that does not influence control in advance, make the preceding current value of electromagnetic coil 9 energisings stable, so the control of electromagnetic coil 9 is not had adverse influence yet.
In addition, utilize bias supply 15 and resistance 14 to constitute bias circuitry in the example 1, but, at this moment also can reach and above-mentioned same effect as the also available constant-current circuit of bias circuitry.
In addition, though be that example is described, can be the fuel injection system of the motor of other vehicles also, and reach and above-mentioned same effect with the fuel injection system of two-wheel vehicle used motor.
Example 2
Fig. 2 illustrates the circuit diagram of fuel injection system of the motor of example 2 of the present invention.
Device shown in Figure 2, comprise: the capacitor C1 of an end ground connection, microcomputer 2 with CPU and various memory units, negative electrode connects the diode 3 of the other end of capacitor 1, output terminal (collector electrode) connects the transistor 4 of the anode of diode 3, resistance 5～7,12, the flow through operational amplifier 8 of solenoid current of transistor 4 of detection, and through the electromagnetic coil 9 of transistor 4 energising/cutout.
The device of Fig. 2 also comprises: the transistor 10 between an end of insertion electromagnetic coil 9 and the negative electrode of diode 3, negative electrode connects the diode 11 of an end of electromagnetic coil 9, insert the anode and the battery between the ground 13 of diode 11, insert the other end of capacitor 1 and the voltage comparator 16 between the microcomputer 2, the operating condition of the motor of test example such as two-wheel vehicle (not shown) is also imported the various sensors 20 of microcomputer 2.
The tie point of transistor 4 and resistance 5 is received positive (+) input end of operational amplifier 8.
The both end voltage (checkout value of solenoid current) of the resistance 5 of operational amplifier 8 outputs is input to microcomputer 2.
Be connected in the resistance 6,7 of amplification usefulness of operational amplifier 8, resistance 6 inserts between the output terminal and inverting input (-) of operational amplifiers 8.Resistance 7 inserts between the inverting input (-) and ground of operational amplifier 8.
Between the control output end of resistance 12 insertion microcomputers 2 and the base stage of transistor 10.
Electromagnetic coil 9 has plunger (not shown), constitutes fuel with transistor 4 and sprays module.
Moving back and forth of the plunger that electromagnetic coil 9 (fuel injection module) produces when utilizing electromagnetic coil 9 energising attracts and pressurizes fuel, and be ejected into motor.
The induction electromotive force that takes place by electromagnetic coil 9 when capacitor 1 store electricity magnetic coil 9 stops.
In addition, the injection correcting unit in the microcomputer 2 simultaneously, when the expression energy reduces state, is proofreaied and correct the driving time of electromagnetic coil 9 according to the energy (power supply capacity) of the 1st and the 2nd electrical current value detection electromagnetic coil 9 along augment direction.
In addition, spray correcting unit, obtain the useful area to time shaft of the electrical current of electromagnetic coil 9, differentiate the energy of electromagnetic coil 9 according to useful area according to the 1st and the 2nd electrical current value.
In addition, among Fig. 2, each dotted arrow A～C represents to flow through the electric current of the circuit that contains electromagnetic coil 9.
That is, dotted arrow A represents that from the electric current of capacitor 1 through transistor 10 inflow electromagnetic coils 9, dotted arrow B represents that dotted arrow C represents to flow through through transistor 4 electric current of resistance 5 from the electric current of battery 13 through diode 11 inflows.
Below, the action of the device of example of the present invention 2 shown in Figure 2 is described with reference to the sequential chart of Fig. 3.
Fig. 3 illustrates each waveform of output voltage of each ground level voltage (from the control voltage of microcomputer 2), each electric current A～C and the voltage comparator 16 of transistor 4,10.
In addition, though the polarity of the base voltage of transistor 4,10 is mutual opposite,, make the conducting of transistor 4,10 synchronous constantly because of the action polarity of transistor 4,10 is also opposite mutually.
At first, at moment t1, under the control of microcomputer 2, when making fuel spray transistor 4 conductings of module driving usefulness, electromagnetic coil 9 is energized, and plunger is attracted.
At this moment,, then flow to the electric current A of electromagnetic coil 9, flow through resistance 5 as electric current C through transistor 4 from capacitor 1 if capacitor 1 is recharged in advance.
Electric current C is after resistance 5 is transformed to voltage, by resistance 6,7 amplifications of operational amplifier 8 and amplification usefulness, as being transfused to microcomputer 2 by electromagnetic coil 9 current values of voltage amplification.
After 4 pairs of electromagnetic coils of transistor 9 were supplied with necessary time current, t3 ended in the moment.
In addition, microcomputer 2 before transistor 4 will end, ends the transistor 10 that is connected in series in electromagnetic coil 9 for the energy with the induction electromotive force of electromagnetic coil 9 deposits capacitor 1 in losslessly.
By ending preceding off transistor 10 at transistor 4, the induction electric potential energy that takes place when electromagnetic coil 9 cutout just can not consumed by electromagnetic coil 9 once more, deposits capacitor 1 in.
At moment t3, when transistor 4 by the time, induction electromotive forces take place from the stopped electromagnetic coil 9 of (demagnetization) of "on" position, induction electromotive force is by 1 charging of 3 pairs of capacitors of diode.
The regenerative current (the current waveform D in the dot-dash wire frame) of the electromagnetic coil 9 that takes place when at this moment, diode 3 formations are ended transistor 4 stores the path of capacitor 1 into.
Moment t2 in during moment t1～t3, the voltage of capacitor 1 is lower than the supply voltage of battery 13, when capacitor 1 energy of depositing becomes the state that does not have, does not have electric current A to flow through, and, flows through the electric current B from battery 13.
At this moment, voltage comparator 16 generates the output voltage of " high level ", and the electric charge that capacitor 1 is deposited is discharged (energy consumption), will be in from the state of 13 pairs of electromagnetic coil 9 supplying electric currents of battery to convey to microcomputer 2.
That is to say, constitute the microcomputer 2 of current detecting part relatedly, after the fact that electromagnetic coil 9 has consumed the energy that capacitor 1 deposited is detected, detect the 1st electrical current of electromagnetic coil 9 with operational amplifier 8.
So, microcomputer 2 (current detecting part) is discharged by capacitor 1, and the supply power that can detect electromagnetic coil 9 is the value of the electric current B after capacitor 1 is converted to battery 13 (the 1st electrical current value) just.
Then, microcomputer 2 after the value that detects electric current B (the 1st electrical current value) through certain hour τ after, detect detection data (the 2nd electrical current value of electromagnetic coil 9) from operational amplifier 8.
So, microcomputer 2 (current detecting part) supply power that can measure electromagnetic coil 9 is converted to behind the battery 13 value (the 2nd electrical current value) through the electric current B after the certain hour τ.
That is to say that microcomputer 2 can be differentiated the size of the useful area to time shaft (to the supply capability of electromagnetic coil 9) of electric current B according to the 1st and the 2nd electrical current value to electromagnetic coil 9.
As mentioned above, according to example 2 of the present invention, have the fuel of detection and spray module (transistor 4, the current detecting part of electrical current electromagnetic coil 9) (resistance 5, operational amplifier 8, microcomputer 2), with the correcting unit (microcomputer 2) of proofreading and correct the driving time of electromagnetic coil 9 according to the checkout value of electrical current, current detecting part comprises the discharge detection of end parts (voltage comparator 16) that detect 1 stored energy of electromagnetic coil 9 consumption capacitors, the solenoid current value of solenoid current value after the rechargeable energy of measuring capacitor 1 just has been consumed when passing through certain hour τ thereafter, when the injection correcting unit in the microcomputer 2 reduces the energy of electromagnetic coil 9 at each solenoid current value representation, the driving time of electromagnetic coil 9 is proofreaied and correct along augment direction, therefore, correction drive controlling can be made, the fuel injection system of the motor that the fuel control accuracy is high can be realized according to the reliable electromagnetic coil 9 of the capacity status of power supply (battery 13).
In addition, in the above-mentioned example 2,, used transistor 4,10 as the switch part of control electromagnetic coil 9 energising usefulness, but also available FET (field effect transistor).
In addition,, used voltage comparator 16 as the discharge detection of end parts of the discharge condition that detects capacitor C, but the A/D mouth (not shown) of also available microcomputer 2.
In addition,, only after through certain hour τ, detect once, but be not limited thereto, also can detect repeatedly in chronological order as the 2nd electrical current value.
At this moment, therefore the energy correct decision can realize more accurate injection control to the useful area of the electric current B of time shaft.
The detection number of times of the electrical current of electromagnetic coil 9 can be established more greatly in the not excessive scope of the computational load of microcomputer 2.
In addition, illustrated, increased the situation of the driving time of proofreading and correct electromagnetic coil 9, but be not limited to power supply capacity, also can detect other energy detecting when the power supply capacity of electromagnetic coil 9 descended.In addition, be not limited to the decline of power supply capacity, also can consider the increase of power supply capacity, when detecting energy changing, make increase and decrease proofread and correct driving time.
In addition, be applied to cheaply with the fuel injection system of motor that the situation of two-wheel vehicle is that example is illustrated, but also can be the fuel injection system of other vehicles, and reach and above-mentioned same action effect.
Claims (13)
1. the fuel injection system of a motor comprises
Have electromagnetic coil and plunger, the moving back and forth of the described plunger that produces by to the energising of described electromagnetic coil the time attracts and pressurize fuel, and to the fuel injection module of engine spray;
Detect the various sensors of the operating condition of described motor;
According to described operating condition, described fuel is sprayed the control unit that module provides drive signal;
Drive/stop the drive control component of described electromagnetic coil;
Be stored in the capacitor of the described electromagnetic coil induction electromotive force that described electromagnetic coil takes place when stopping;
When the driving of described electromagnetic coil, emit and pass on the energy reception and registration parts of the energy of described capacitor stores;
Detect the current detecting part of the electrical current of described electromagnetic coil; And
According to the electrical current checkout value of described electromagnetic coil, proofread and correct the injection correcting unit that described fuel sprays the driving time of module, it is characterized in that,
In the described current detecting part bias circuitry is set,
Described current detecting part is according to described electrical current checkout value, by detecting described electromagnetic coil energising current value before, calculating is for the current value before and after the energising of described electromagnetic coil, flow through predetermined bias current from described bias circuitry simultaneously, thereby the preceding current value of energising of described electromagnetic coil is stablized.
2. the fuel injection system of motor as claimed in claim 1 is characterized in that,
Described current detecting part deducts the value of the current detection value before the energising of described electromagnetic coil with the electrical current checkout value from described electromagnetic coil, as final electrical current checkout value.
3. the fuel injection system of motor as claimed in claim 2 is characterized in that,
Described bias current is set for the current value that does not influence the degree of the control of described electromagnetic coil.
4. the fuel injection system of motor as claimed in claim 1 is characterized in that,
Described bias circuitry comprises the bias supply that is made of fixed power source.
5. the fuel injection system of motor as claimed in claim 1 is characterized in that,
Described bias circuitry is made of constant-current circuit.
6. the fuel injection system of motor as claimed in claim 1 is characterized in that,
Described motor is installed on the two-wheel vehicle with vehicle mounted battery power,
Described current detecting part comprises operational amplifier,
The power supply of described operational amplifier uses the DC power supply of the OV benchmark identical with described vehicle power to move.
7. the fuel injection system of a motor comprises:
Have electromagnetic coil and plunger, the moving back and forth of the described plunger that produces by to the energising of described electromagnetic coil the time attracts and pressurize fuel, and to the fuel injection module of engine spray;
Detect the various sensors of the operating condition of described motor;
According to described operating condition, described fuel is sprayed the control unit that module provides drive signal;
Drive/stop the drive control component of described electromagnetic coil;
Be stored in the capacitor of the described electromagnetic coil induction electromotive force that described electromagnetic coil takes place when stopping;
When the driving of described electromagnetic coil, emit and pass on the energy reception and registration parts of the energy of described capacitor stores;
Detect the current detecting part of the electrical current of described electromagnetic coil; And
According to the electrical current checkout value of described electromagnetic coil, proofread and correct the injection correcting unit of the driving time of described electromagnetic coil, it is characterized in that,
Described current detecting part comprises the described electromagnetic coil of detection and consumes the energy of described capacitor stores, the discharge detection of end parts that the rechargeable energy discharge of described capacitor finishes,
After the energy of described capacitor is consumed, detect the 1st electrical current value of described electromagnetic coil immediately, simultaneously
Detecting described the 1st electrical current value after behind the certain hour, detect the 2nd electrical current value of described electromagnetic coil,
Described injection correcting unit detects the energy for described electromagnetic coil according to the described the 1st and the 2nd electrical current value, simultaneously according to the described driving time of described energy correction.
8. the fuel injection system of motor as claimed in claim 7 is characterized in that,
As described energy, described injection correcting unit is proofreaied and correct described driving time along augment direction when detecting for the power supply capacity of described electromagnetic coil and representing described power supply capacity decline state.
9. the fuel injection system of motor as claimed in claim 7 is characterized in that,
Described injection correcting unit is obtained the useful area to time shaft of described electromagnetic coil electrical current according to the described the 1st and the 2nd electrical current value, and according to described useful area, differentiates the energy for described electromagnetic coil.
10. the fuel injection system of motor as claimed in claim 7 is characterized in that,
Described current detecting part is repeatedly carried out the detection of described the 2nd electrical current value chronologically.
11. the fuel injection system of motor as claimed in claim 7 is characterized in that,
Described discharge detection of end parts are made of the voltage comparator of the voltage that detects described capacitor (1).
12. the fuel injection system of motor as claimed in claim 7 is characterized in that,
Described discharge detection of end parts utilize the A/D mouth of described control unit to constitute.
13. the fuel injection system of motor as claimed in claim 7 is characterized in that,
Described motor is installed on the two-wheel vehicle with vehicle mounted battery power.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005345167A JP2007146798A (en) | 2005-11-30 | 2005-11-30 | Fuel injection device for engine |
| JP2005345167 | 2005-11-30 | ||
| JP2005348864 | 2005-12-02 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810108725 Division CN101319635B (en) | 2005-11-30 | 2006-08-31 | Fuel injection device for engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1975141A true CN1975141A (en) | 2007-06-06 |
| CN100439690C CN100439690C (en) | 2008-12-03 |
Family
ID=38125422
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810108725 Expired - Fee Related CN101319635B (en) | 2005-11-30 | 2006-08-31 | Fuel injection device for engine |
| CNB2006101285278A Expired - Fee Related CN100439690C (en) | 2005-11-30 | 2006-08-31 | Fuel jet device of engine |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810108725 Expired - Fee Related CN101319635B (en) | 2005-11-30 | 2006-08-31 | Fuel injection device for engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007146798A (en) |
| CN (2) | CN101319635B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102933824A (en) * | 2010-05-27 | 2013-02-13 | 日立汽车系统株式会社 | Fuel injection device for internal combustion engine and control method |
| CN107208566A (en) * | 2015-01-28 | 2017-09-26 | 罗伯特·博世有限公司 | Method for operation and the actuation means for piston pump |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963121B (en) * | 2010-09-07 | 2012-02-08 | 力帆实业(集团)股份有限公司 | Detecting method of oil injector detecting control circuit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19735560B4 (en) * | 1997-08-16 | 2007-06-21 | Robert Bosch Gmbh | Method and device for controlling a consumer |
| JP2000002357A (en) * | 1998-06-18 | 2000-01-07 | Denso Corp | Solenoid valve control device |
| JP3619040B2 (en) * | 1999-01-19 | 2005-02-09 | 三菱電機株式会社 | Combustion state detection device for internal combustion engine |
| JP4794768B2 (en) * | 2001-08-02 | 2011-10-19 | 株式会社ミクニ | Solenoid drive |
| US7273038B2 (en) * | 2002-12-10 | 2007-09-25 | Mikuni Corporation | Fuel injection control method and fuel-injection control device |
| JP3842277B2 (en) * | 2004-10-01 | 2006-11-08 | 三菱電機株式会社 | Combustion state detection device for internal combustion engine |
-
2005
- 2005-11-30 JP JP2005345167A patent/JP2007146798A/en active Pending
-
2006
- 2006-08-31 CN CN 200810108725 patent/CN101319635B/en not_active Expired - Fee Related
- 2006-08-31 CN CNB2006101285278A patent/CN100439690C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102933824A (en) * | 2010-05-27 | 2013-02-13 | 日立汽车系统株式会社 | Fuel injection device for internal combustion engine and control method |
| CN102933824B (en) * | 2010-05-27 | 2016-02-03 | 日立汽车系统株式会社 | The fuel injection system of internal-combustion engine and controlling method |
| US9777667B2 (en) | 2010-05-27 | 2017-10-03 | Hitachi Automotive Systems, Ltd. | Fuel injector and control method for internal combustion engine |
| CN107208566A (en) * | 2015-01-28 | 2017-09-26 | 罗伯特·博世有限公司 | Method for operation and the actuation means for piston pump |
| CN107208566B (en) * | 2015-01-28 | 2021-04-02 | 罗伯特·博世有限公司 | Method for operating and control device for a piston pump |
| US10989186B2 (en) | 2015-01-28 | 2021-04-27 | Robert Bosch Gmbh | Operating method and actuation device for a piston pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101319635A (en) | 2008-12-10 |
| CN101319635B (en) | 2011-12-28 |
| JP2007146798A (en) | 2007-06-14 |
| CN100439690C (en) | 2008-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1770610A (en) | Switching power supply circuit and electronic apparatus provided therewith | |
| CN1300893C (en) | Method and device for estimating remaining capacity of secondary cell, battery pack system, and electric vehicle | |
| CN1075269C (en) | Voltage regulator for vehicles having ac generator | |
| CN101034864A (en) | Controller for electric vehicle and driving apparatus for the electric vehicle | |
| EP2106015A3 (en) | Power supply device for electrically driven injection molding machine and electrically driven injection molding machine | |
| CN1449099A (en) | Electric power unit and portable machine containing the same | |
| CN1860671A (en) | Switching-mode power supply | |
| CN101065891A (en) | Switching power supply and its control circuit, and electronic apparatus employing such switching power supply | |
| TW201325050A (en) | System and method of feed forward for boost converters with improved power factor and reduced energy storage | |
| CN1622437A (en) | Switching regulator | |
| CN1826720A (en) | Primary-side controlled flyback power converter | |
| CN1975141A (en) | Fuel jet device of engine | |
| CN1531181A (en) | Converter devices | |
| CN1537197A (en) | Fuel injection method | |
| CN102192024A (en) | Injector drive circuit | |
| CN1199267A (en) | Electric generator controlling device for vehicle | |
| TWI259235B (en) | Fuel injection controller and controlling method | |
| CN1691479A (en) | Switching power supply circuit | |
| CN105049024A (en) | High-precision frequency sweeping circuit and frequency sweeping method of ultrasonic atomization piece | |
| CN101075785A (en) | Power supply circuit device and electronic apparatus provided therewith | |
| CN102060017A (en) | Method for operating a hybrid drive | |
| US20150202863A1 (en) | Liquid Discharging Apparatus | |
| CN1291150C (en) | Fuel supply device and fuel suuplus indicator of fuel supply device | |
| CN1777789A (en) | Angular velocity sensor and automobile using the same | |
| CN1774570A (en) | Control method and device for fuel injection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081203 Termination date: 20210831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |