CN101825032A - Method and system for closed-loop control over injection amount of electronic fuel injection internal combustion engine - Google Patents
Method and system for closed-loop control over injection amount of electronic fuel injection internal combustion engine Download PDFInfo
- Publication number
- CN101825032A CN101825032A CN200910096248A CN200910096248A CN101825032A CN 101825032 A CN101825032 A CN 101825032A CN 200910096248 A CN200910096248 A CN 200910096248A CN 200910096248 A CN200910096248 A CN 200910096248A CN 101825032 A CN101825032 A CN 101825032A
- Authority
- CN
- China
- Prior art keywords
- lambda sensor
- value
- fuel injection
- sampled value
- maximum
- 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
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a system and a method for closed-loop control over the injection amount of an electronic fuel injection internal combustion engine. The system at least comprises a fuel injector, an engine electronic control unit ECU and a switch-type oxygen sensor. The system is characterized in that an A/D conversion modulating circuit for measuring the output voltage of the oxygen sensor and a digital logical processing unit MCU for determining the injection amount are arranged in the ECU. The method comprises a digital logic processing process, wherein the ECU acquires an output signal of the current oxygen sensor regularly or synchronously with a crank angle, judges whether the oxygen sensor is in a usable state or not, contrasts a sampling value of the current oxygen sensor and a pre-determined critical numerical value, judges whether a current mixed gas is dilute or concentrated, instantly feeds back and adjusts the injection amount; and the ECU dynamically updates and judges the critical numerical value of the mixed gas for judging the concentration of the mixed gas at next time.
Description
Technical field
The present invention relates to electrically-controlled fuel-oil jetting IC engine, particularly adopt the electronic fuel injection spark-ignited internal combustion engine of switching mode lambda sensor closed-loop feedback fuel injection amount.
Background technique
Internal-combustion engine adopts the electronic fuel injection fuel system, can accurately control fuel injection amount, thereby raising internal-combustion engine, especially the performance of spark ignition engine, particularly adopt the system of switching mode lambda sensor closed-loop feedback fuel injection amount, can accurately control mixed gas in theoretical stoichiometric ratio, thereby guarantee that flameholding is complete, automatically adapt to engine production and make uncontrollable factors such as scattered error, durable process variation, cooperate the three-element catalytic emission-control equipment again, can reduce the noxious gas emission of motor significantly.
The fundamental characteristics of switching mode lambda sensor is, its output signal changes with the height of oxygen concentration in the measured mixed gas, when oxygen concentration is very low, and general output HIGH voltage signal, and oxygen concentration is when being increased to certain value, and output voltage signal can become 0 fast.The switching mode lambda sensor has two kinds on zirconia ceramics type and titanium oxide ceramics type, and the former exports directly and is the magnitude of voltage of 0-1000mV, and the latter's direct variation physical quantity is a resistance, but general also design changes into the output voltage of 0-1000mV.During general design, output voltage is changed pairing oxygen concentration fast, when being set at engine mixed gas and near theoretical chemical equivalent, burning, the residual oxygen gas concentration in the gas of combustion.For the burning of regular gasoline and air, the theoretical chemistry equivalent is that air is 14.6-14.8 with the quality of fuel ratio.When mixture strength is denseer than chemical equivalent, the lambda sensor output HIGH voltage in the vent systems, and when mixture strength is rarer than chemical equivalent, the lambda sensor output LOW voltage, specified rare dense shift voltage is 450-470mV.
Yet lambda sensor is wanted proper functioning, must reach certain temperature condition.When motor just started, delivery temperature adds heated oxygen sensor made its temperature rising need the regular hour, even adopt the electric heating type lambda sensor, can not guarantee that lambda sensor just can proper functioning at the beginning.In addition, after lambda sensor is aging, or owing to after manufacturing or improper use damage, its characteristic also can change.Therefore, engine electric-controlled unit ECU must judge the reliability of oxygen sensor signal at any time, can not be simply with oxygen sensor signal whether greater than 470mV or less than the foundation of 450mV as feedback control.
Existing public technology great majority adopt comparator to judge that the mixed gas state that oxygen sensor signal is represented is rare or dense, then comparative result are imported the data processing system (CPU or MCU) among the ECU, come the feedback regulation fuel injection quantity with this.For example U. S. Patent 4,556,033 discloses a kind of method, come the size of the voltage signal OX and a rare dense shift voltage reference value OXR of comparison lambda sensor by comparator, (XAF=1 represents dense to obtain rare dense state XAF, XAF=0 represents rare), and the OXR value is followed the size of XAF and OX value and is adjusted.For example, when XAF=1 and current OX-OXR＞0.12V, new OXR=OX-0.12V will be obtained.
Yet, in this technology, because any setting more complicated of OXR value, and be interfered easily, therefore, must consider after the OXR value is made mistakes, how to return to as soon as possible the treatment device of normal value, this just makes system more complicated.In addition, also do not reach requirement in the lambda sensor operating conditions, for example in the warming-up process behind the starting a cold engine, or after lambda sensor is aging, or owing to after manufacturing or improper use damage, the lambda sensor internal resistance very big and cause its output signal can't use or easily the misuse situation under, how to prevent that error feedback from remaining a problem.
Summary of the invention
The present invention's purpose is to provide a kind of control system and method for fuel injection quantity of closed loop electrically-controlled fuel-oil jetting IC engine, and the hardware of its system is simple as far as possible, and complicated logical operation relies on software to realize, thus simplified control system.
Another purpose of the present invention is to provide a kind of method effectively to handle in the lambda sensor operating conditions and does not also meet the requirements of oxygen sensor signal under the state fully, prevent the misuse of its output signal when the lambda sensor internal resistance is very big, in warming-up process, use close-loop feedback control simultaneously as early as possible.In addition, when the oxygen sensor signal reliability is not high, to prevent that also error feedback is excessive.
Another purpose of the present invention is to provide a kind of method to judge whether lambda sensor is normal, and whether the feedback regulation of fuel injection quantity is normal, thereby in time provides the indicating fault about lambda sensor.
The present invention's purpose reaches by following technical proposal, that is:
A kind of fuel injection amount control system and method for automatically controlled internal-combustion engine of closed loop control fuel injection quantity, described system comprises fuel injector (oil sprayer) at least, engine electric-controlled unit ECU, the switching mode lambda sensor, it is characterized in that, be provided with analog-to-digital conversion (A/D conversion) conditioning circuit of measuring described lambda sensor output voltage among the described ECU, and the digital logic treatment device MCU that is used for determining fuel injection quantity; Described method comprises the digital logic processing procedure, at least may further comprise the steps: described ECU regularly or with the output signal of the current lambda sensor of crank angle synchronization gain, judge whether described lambda sensor is in upstate, if it is available, the difference of the critical numerical value determined of the sampled value of more current lambda sensor and front again, if the sampled value of current lambda sensor is greater than described critical numerical value, judge that then current mixed gas is dense partially, stop adjusting of fuel injection quantity incremental feedback or the adjusting of beginning decrement immediately; If the sampled value of current lambda sensor, judges then that current mixed gas is rare partially less than described critical value, stop feedback regulation of fuel injection quantity decrement or beginning incremental adjustments immediately, keep mixed gas to level off to the theoretical chemistry equivalent proportion as much as possible with this; ECU dynamically updates and judges the rare dense critical numerical value of mixed gas then, sampled value history according to the sampled value of current lambda sensor and nearest lambda sensor, recomputate or revise described critical numerical value, obtain new being used for and judge the rare dense critical numerical value of mixed gas next time.
According to this technological scheme, the hardware components of ECU does not need to design complicated comparison circuit, and complicated logical operation relies on the software among the ECU to realize, thereby control system is greatly simplified.
Following technical proposal can further improve the present invention.
The analog-to-digital conversion of described lambda sensor output voltage (A/D conversion) conditioning circuit comprises: by two resistance, or a resistance and two diodes, the reference voltage circuit of the judgement lambda sensor state that constitutes, and resistance mega-ohms, a current limliting small resistor, with a maintenance capacitor, described lambda sensor output voltage is sampled by described ECU through described current limliting small resistor.It is zero that described current limliting small resistor may diminish to resistance.When described lambda sensor outlet line opens circuit or the internal resistance of described lambda sensor during greater than described relatively reference resistance, MCU obtains data by A/D conversion sampling, these data greater than set in advance, judge that described lambda sensor opens circuit or is in the benchmark numerical value of complete disabled state.After the internal resistance of described lambda sensor is less than certain value, described lambda sensor will be exported a signal that changes with the size of the oxygen concentration in the measured exhaust, and sampling by the A/D conversion of ECU becomes the numerical value that size changes in default effective span.
The fuel injection system of the automatically controlled internal-combustion engine of described closed loop control fuel injection quantity, comprise a system failure display unit, it is characterized in that, logical process process among the described ECU comprises: if the sampled value of current lambda sensor has exceeded preset value range, perhaps fuel injection quantity has been adjusted to maximum or minimum limit value, then ECU immediately or finish closed loop control and enter open loop control mode after continuing the regular hour and exports one or several closed-loop feedback trouble signals; If the maximum of the sampled value of described lambda sensor, described lambda sensor sampled value and minimizing difference and described critical numerical value have all had rational value again, then ECU cancels the closed-loop feedback trouble signal at once, and commencement of fuel injection amount closed loop control again.
According to above-mentioned improvement project, when opening circuit appears in lambda sensor, internal resistance is excessive for a long time or signal substantially no longer fluctuates when changing, ECU just can stop using oxygen sensor signal to come feedback control, and provides lambda sensor fault or closed-loop feedback indicating fault.
The fuel injection quantity controlling method of closed loop electrically-controlled fuel-oil jetting IC engine of the present invention, described critical numerical value is determined according to maximum and minimum the last or that occur for several times that described lambda sensor enters behind the upstate, described critical numerical value is between described maximum and the minimum, and for example described critical numerical value equals a described maximum and a minimizing arithmetic weighted mean.So just can access reliable critical numerical value, its size is between the lambda sensor real signal value that occurred recently very big and minimum all the time.
The fuel injection quantity controlling method of described closed loop electrically-controlled fuel-oil jetting IC engine, the Weighting factor of described maximum more than or equal to 0.4 smaller or equal to 0.8, the Weighting factor of described arithmetic weighted mean is relevant with minimizing difference with described maximum, described maximum and minimizing difference are big more, the Weighting factor of described maximum is also just big more, and described minimizing Weighting factor is also just more little.Can prevent that like this critical numerical value too is partial to rare direction.
The fuel injection quantity controlling method of described closed loop electrically-controlled fuel-oil jetting IC engine, definite step of described maximum also comprises: relatively the sampled value of this lambda sensor and last time lambda sensor the difference in size of sampled value, if this numerical value is big, then compare with the maximum of determining last time again, if the maximum that determined this numeric ratio last time is also big, then with the sampled value of this lambda sensor as new maximum, or certain average computation of sampled value by this lambda sensor and the maximum determined last time obtains a new maximum.The maximum that can prevent the sampled value too frequent variation of appearance of lambda sensor like this and cause is too small.
The fuel injection quantity controlling method of described closed loop electrically-controlled fuel-oil jetting IC engine, definite step of described maximum also comprises: relatively the sampled value of this lambda sensor and last time lambda sensor the difference in size of sampled value, if this numerical value is little, whether the sampled value of several lambda sensor did not diminish before then judging again, if do not diminish, judge again that then whether current maximum and minimizing difference are greater than certain default numerical value, if greater than described certain default numerical value, then with the sampled value of this lambda sensor as new maximum, or certain average computation of sampled value by this lambda sensor and the maximum determined last time obtains a new maximum.Like this, can prevent not the following of maximum during heating gradually of lambda sensor in the warming-up process.
The fuel injection quantity controlling method of described closed loop electrically-controlled fuel-oil jetting IC engine, the initial value of described maximum is taken as that the sampled value of first lambda sensor adds a predetermined value behind the engine start, but must not be, or directly be taken as the maximum value of effective span of lambda sensor sampled value greater than the maximum value of effective span of lambda sensor sampled value.
The fuel injection quantity controlling method of described closed loop electrically-controlled fuel-oil jetting IC engine, described minimizing determining step comprises: relatively the sampled value of this lambda sensor and last time lambda sensor the difference in size of sampled value, if this numerical value is little, then compare with the minimum of determining last time again, if the minimum that determined this numeric ratio last time is also little, then with the sampled value of this lambda sensor as new minimum, or obtain a new minimum by the sampled value of this lambda sensor and minimizing certain average computation of determining last time.
The fuel injection quantity controlling method of described closed loop electrically-controlled fuel-oil jetting IC engine, described minimizing determining step also comprises: relatively the sampled value of this lambda sensor and last time lambda sensor the difference in size of sampled value, if this numerical value is big, whether the sampled value of several lambda sensor becomes serious offense before then judging again, if do not become serious offense, judge again that then whether current maximum and minimizing difference are greater than certain default numerical value, if greater than described certain default numerical value, then with the sampled value of this lambda sensor as new minimum, or obtain a new minimum by the sampled value of this lambda sensor and minimizing certain average computation of determining last time.The minimum that can prevent the sampled value too frequent variation of appearance of lambda sensor like this and cause is excessive.
The fuel injection quantity controlling method of described closed loop electrically-controlled fuel-oil jetting IC engine, described minimizing initial value is taken as that the sampled value of first lambda sensor deducts a predetermined value behind the engine start, or the maximum value that directly is taken as effective span of lambda sensor sampled value deducts a predetermined value, but must not be less than zero.
The fuel injection quantity controlling method of described closed loop electrically-controlled fuel-oil jetting IC engine, described maximum and minimizing determining step also comprise: continuous (for example 3 times) for several times are constant if described maximum is upgraded the sampled value of post oxygen sensor, and sampled value is less than critical value, and then described maximum reduces one and fixedly plants; If the sampled value that described minimum is upgraded post oxygen sensor continuously for several times (for example 3 times) constant, and sampled value is greater than critical value, then described minimum increases by one and fixedly plants.Maximum and minimizingly do not follow in the time of can preventing like this that the lambda sensor state from changing (for example under the idling operation warming up or wind cooling) very slowly.
The fuel injection quantity controlling method of described closed loop electrically-controlled fuel-oil jetting IC engine, further comprising the steps of: when judge current mixed gas rare dense according to the sampled value of this lambda sensor and described critical numerical value after, to carry out feedback regulation to fuel injection amount, the scope of described feedback regulation to fuel injection quantity is subjected to the restriction of current maximum and minimizing difference, described maximum and minimizing difference are big more, then allow the scope of feedback regulation of fuel injection quantity also big more, described maximum and minimizing difference stop feedback regulation during less than certain default numerical value.
The fuel injection quantity controlling method of described closed loop electrically-controlled fuel-oil jetting IC engine, further comprising the steps of: when judge current mixed gas rare dense according to lambda sensor after, the described maximum after the scope of described feedback regulation to fuel injection quantity is begun by closed-loop feedback also and the influence of minimizing update times, update times does not reach predefined number of times, and the scope of then described feedback regulation to fuel injection quantity will be limited forr a short time.
According to technique scheme, when the oxygen sensor signal reliability was high, described maximum and minimizing difference can be bigger, so the scope of feedback regulation allows more a little bigger; When the oxygen sensor signal reliability reduced, described maximum and minimizing difference can diminish, so the scope of feedback regulation will be subjected to stricter restriction, even stopped feedback regulation.
In a word, benefit of the present invention is, a kind of fuel injection quantity controlling method and device of closed loop electrically-controlled fuel-oil jetting IC engine is provided, and the hardware of its system is simple, and complicated logical operation relies on software to realize, makes mistakes thereby be difficult for being interfered; Also do not meet the requirements of under the state fully in the lambda sensor operating conditions, the invention provides a kind of method, can effectively handle oxygen sensor signal, prevent the misuse of its output signal when the lambda sensor internal resistance is very big, in warming-up process, use close-loop feedback control simultaneously as early as possible; Whether normally the present invention also provides a kind of and judges the lambda sensor method of farming, thereby can in time provide the indicating fault about lambda sensor.
Description of drawings
Fig. 1 is the formation sketch of the fuel injection quantity control system of the present invention's closed loop electrically-controlled fuel-oil jetting IC engine.
Fig. 2 is the lambda sensor conditioning circuit principle sketch of the engine electric-controlled unit (ECU) of the embodiment of the invention.
Fig. 3 utilizes oxygen sensor signal to carry out the logic diagram of fuel injection quantity feedback control for the engine electric-controlled unit (ECU) of the embodiment of the invention.
Fig. 4 determines the logic diagram of oil spout feedback regulation amount for the engine electric-controlled unit (ECU) of the embodiment of the invention.
Fig. 5 asks for the logic diagram of oxygen sensor signal extreme value for the engine electric-controlled unit (ECU) of the embodiment of the invention.
Describe the present invention in detail by these accompanying drawings below.
Embodiment
In embodiment's shown in Figure 1 control system, ECU 100 comprises the output driving circuit 13,14 and 15 and ROM (read-only memory) (ROM) 16 etc. of the conditioning circuit 7,8 and 9, oil sprayer of input analogue signal such as the shaping circuit 6, lambda sensor of supplied with digital signal such as microprocessor (MCU) 101, footmark signal etc., ROM 16 also can carry for MCU 101, and MCU 101 comprises A/D conversion inlet opening 10, digital quantity inlet opening 11 and delivery outlet 12 at least.Lambda sensor 1, engine temperature (coolant water temperature) sensor 2 and intake air temperature sensor 3 link to each other with A/D conversion inlet opening 10 with 7 by conditioning circuit 9,8 respectively, throttle position sensor 4 directly links to each other with A/D conversion inlet opening 10, footmark signal 5 links to each other with digital quantity inlet opening 11 by shaping circuit 6, and oil sprayer 19, igniter 18 and accident indicator 17 link to each other with delivery outlet 12 with 15 by output driving circuit 13,14 respectively.MCU 101 inside comprise can carry out the logic processing device (not shown) that complex digital calculates, and realizes various controls by the embedded software that writes.The data that MCU 101 measures according to the logic of embedded software and each sensor (1,2,3,4,5 etc.), calculate the output quantity that drives each performer (comprising oil sprayer 19, igniter 18 and accident indicator 17 etc.), and output to drive circuit 13,14 and 15, finish control.
Fig. 2 is the lambda sensor conditioning circuit principle sketch of the engine electric-controlled unit (ECU) of the embodiment of the invention.With zirconium oxide switching mode lambda sensor 1 is example, its equivalent circuit is equivalent to a battery V0 and a resistance R 0 (lambda sensor internal resistance) series connection, the output voltage V 0 of battery V0 has been represented the oxygen concentration in the exhaust, usually, V0＞470mV represents that the engine charge mixed gas is dense partially, the about 1000mV of the maximum value of V0; V0＜470mV represents that the engine charge mixed gas is rare partially, the about 0mV of the minimum value of V0.Lambda sensor internal resistance R0 is the function of lambda sensor operating conditions, and the lambda sensor temperature is during less than 300 ℃, and R0 can be very big, approaches to open circuit.After lambda sensor was aging, even the lambda sensor temperature is very high, R0 still can be bigger.Therefore, in the engine warm-up process or have winter under the wind environment in the long-time idling process, R0 still can bigger and constantly variation.In this case, V0 is difficult to measure accurately.Conditioning circuit shown in Figure 2 can be judged whether lambda sensor is in normal working by the magnitude of voltage that MCU A/D conversion obtains, even judge the confidence level of oxygen sensor signal.Its principle is as follows:
The reference power supply voltage vcc obtains a branch pressure voltage by divider resistance R1, R2, as the reference voltage Vr that judges the lambda sensor state, through a big resistance R 3 of comparison reference and a current limliting small resistor R4, and a maintenance capacitor Cl, Vr combines V0 and is obtained an oxygen sensor signal sampled value OXS by the MCU sampling.Because R3＞＞R1, R3＞＞R4, can be similar to and obtain:
OXS＝Vr*(R0+R4)/(R0+R4+R3)+V0*R3/(R0+R4+R3)
By following formula as can be known, when R0＞R3 is lambda sensor internal resistance when very big, OXS depends primarily on Vr, and the variation of the V0 that the rare dense variation of mixed gas causes can only cause OXS variation very by a small margin, and the minimum value of OXS will be bigger.Therefore can judge the reliability of oxygen sensor signal by the fluctuating range of OXS, certain mean value of OXS undulating value can be used as the rare dense critical numerical value of engine charge mixed gas, is the primitive decision condition that oxygen sensor signal can be used with " value of OXS is no more than some predefined value A ".When OXS＞=A, can be judged to be not proper functioning of lambda sensor.The reliability of oxygen sensor signal can directly be associated with the limited field of closed-loop feedback regulated quantity.More excellent Vr=1250mV, A=1100mV, the R3=1M Ω of being designed to.
Certainly, the reference power supply voltage vcc among Fig. 2 obtains the circuit of reference voltage Vr by divider resistance R1, R2, also can form by a resistance and two diodes, and the constant voltage about the 1250mV that two diodes form can be used as Vr equally.
Fig. 3 utilizes oxygen sensor signal to carry out the logic diagram of fuel injection quantity feedback control for the engine electric-controlled unit (ECU) of the embodiment of the invention.After ECU powers on, at first carry out the initialization (step 30) of various parameters, for example give the maximum value Maxx and the minimum M inx tax initial value of oxygen sensor signal, compose initial value, enter step 31 then and wait for sampling (the synchronous or timing of crank angle) to rare dense critical parameter OXR.The Maxx initial value can be taken as aforesaid predefined value A, and the Minx initial value can be taken as A-2d, and the OXR initial value can be taken as A-d, and d is minimum available amplitude of fluctuation here, for example desirable d=80-200mV.Step 32 will obtain each sampled value, enter step 34 then and judge whether oxygen sensor signal is available; If OXS＜A is false, show that oxygen sensor signal is unavailable, to enter step 33, to make feedback regulation fuel injection quantity scope FCR be 0, promptly do not feed back, increase the Cumulative time for simultaneously the unavailable endurance Lightoff of oxygen sensor signal, enter step 36 again and judge whether Lightoff has exceeded normal maximum size tc, if exceeded then error code parameter MIL1 is put 1.The tc value can be taken as 30-180 second.If 34 judge that OXS＜A sets up, to judge that present mixed gas state is rare or dense by step 35, if OXS＞OXR sets up, show that the mixed gas state is dense, give rare dense status parameter AF assignment " R " in step 38,, show that the mixed gas state is rare if instead OXS＞OXR is false, give rare dense status parameter AF assignment " L " in step 39, enter step 40 then and calculate new parameter:
FCR＝k*(Maxx-Minx)
OXR＝r*Maxx+(1-r)*Mi?nx
Lightoff＝0
MIL1＝0
Here, k is the constant coefficient of related Maxx-Minx and FCR, and r is a weighted mean Maxx and Minx used Weighting factor when obtaining new OXR, and MIL1=0 represents not have " lambda sensor can not be worked " mistake.The size of r is relevant with the number of times that peak value appears in OXS, and initial k is 0, the maximum of an OXS of every subsequently appearance or and little value all increase a constant f, reach its maximum value kz (seeing the step 76 and 77 of Fig. 5) up to k.Design is in order to ensure only after fluctuation (for example more than 3 times) has appearred repeatedly in lambda sensor like this, can think that just the signal of lambda sensor has enough reliabilities and is used for the fuel injection quantity feedback regulation.R can be between 0.4-0.8 value, and can be relevant with (Maxx-Minx), (Maxx-Minx) big more, r is also big more.In step 41, will be stored in up-to-date L+1 lambda sensor sampled value among the array OX (i), for future use.In step 42, oil spout feedback regulation amount Dtfi, the oil spout that calculates next time driven pulsewidth, various error codes etc., and output on the corresponding driving device.Some details of step 42 as shown in Figure 4.In step 43, maximum value Maxx and minimum M inx that the oxygen sensor signal that calculating is made new advances fluctuates supply new FCR of sampling back calculating next time and OXR etc., and detail as shown in Figure 5.
In the logic diagram of definite oil spout feedback regulation amount shown in Figure 4, step 50 judges whether that lambda sensor is in normal working, if FCR=0, show that lambda sensor is not in normal working, oil spout feedback regulation amount Dtfi=0 then, otherwise, judge in step 51 whether dense rare state variation has taken place, and AF0 is dense rare state of a last computation cycles, if AF=AF0 here, do not illustrate and change, judge it is dense or rare in step 53 then,, then enter rare State integral and increase oily regulated quantity calculation procedure 55:Dtfi=Dtfi+c1 if not dense, here, c1 is that integration increases oil adjusting step-length.If judge it is dense in step 53, then enter dense State integral and subtract oily regulated quantity calculation procedure 56:Dtfi=Dtfi-c2, here, c2 is that integration subtracts oil adjusting step-length.If variation has taken place for dense rare state in the result who judges in step 51, then step 52 judge be rare change to dense or dense change to rare, if rare change to dense, then enter differential and subtract oily regulated quantity calculation procedure 57:Dtfi=Dtfi-c3, here, c3 is that differential subtracts oil adjusting step-length, and c3 can be the constant greater than c2, also can be taken as 0 in the regular hour.If judge it is densely to change to rarely in step 52, then enter differential and increase oily regulated quantity calculation procedure 58:Dtfi=Dtfi+c4, here, c4 is that differential increases oil and regulates step-length, c4 can be the constant greater than c1, also can be taken as 0 in the regular hour.After having calculated Dtfi, enter step 59 and judge whether the feedback regulation amount has reached the limited field border, among the embodiment here, the limited field border symmetry of increase and decrease oil is ± FCR, but in fact also can adopts asymmetric limited field border, for example+and FCR ,-FCR/2.If step 59 is judged the feedback regulation amount in the limited field border, then enter step 64 feed back to error code MIL2, MIL3 and accumulative total in limited time between the Mtime return-to-zero.Error code MIL2=1 represents at present feedback regulation to the limit, and error code MIL3=1 has represented feedback regulation for a long time to the limit, and problem may appear in system, is the open loop operation at present.If step 59 judges that the feedback regulation amount is not in the limited field border, then entering step 60 makes error code MIL2 put 1, Mtime added up between accumulative total fed back in limited time, whether Mtime has reached overtime critical value td between feeding back in limited time by step 61 judgement accumulative total again, if having reached then having entered step 62 makes error code MIL3 put 1, stop the fuel injection quantity feedback regulation simultaneously, even Dtfi=0, if Mtime did not reach overtime critical value td between the accumulative total that step 61 is judged fed back in limited time, then enter step 63 Dtfi is changed to boundary value.The td value can be taken as 30-180 second.After above-mentioned steps is finished, enter step 65, earlier the AF0 value is upgraded, export oil spout, igniting and fault then and show control command.
In the logic diagram of asking for the oxygen sensor signal extreme value shown in Figure 5, at first judge that in step 70 whether current lambda sensor sampled value is greater than Maxx, if, then the upper limit Maxx of the original fixed lambda sensor sampled value scope of explanation is obviously unreasonable, enter step 74 with OXS as new Maxx.If step 70 judged result is a "No", then enter step 71 again and judge that whether current lambda sensor sampled value is less than Minx, if then the lower limit Minx of the original fixed lambda sensor sampled value scope of explanation is obviously unreasonable, enter step 73 with OXS as new Minx.If the result that step 71 is judged be a "No", then enter step 72 judge whether the lambda sensor sampled value occurred new peak value or continuously for several times (L time) begin again to descend after constant but apart from Minx enough big difference in addition, judgment formula is:
OX(i-1)≥OX(i)(i＝2，L)AND?OX(0)＜OX(1)AND?OX≥Minx+d
If judged result is a "Yes", illustrate that then Maxx needs to revise, enter step 76 weighted mean OXS and Maxx and obtain a new Maxx, and calculate new k value.Here, " continuously for several times (L time) constant then begin again to descend " as the condition of upgrading Maxx, is because lambda sensor meeting ignition gradually in the engine warm-up process, and the output signal of its dense state correspondence may descend at a slow speed.L can be taken as a certain number between 2～30.If step 72 judged result is a "No", then enter step 75 judge whether the lambda sensor sampled value occurred new low valley or continuously for several times (L time) begin again to rise after constant but apart from Maxx enough big difference in addition, judgment formula is:
OX(i-1)≤OX(i)(i＝2，L)AND?OX(0)＞OX(1)AND?OX≤Maxx-d
If judged result is a "Yes", illustrate that then Minx needs to revise, enter step 77 weighted mean OXS and Minx and obtain a new Minx, and calculate new k value.If step 75 judged result is a "No", illustrate that then OXS is between Maxx and the Minx, and the current extreme value that do not occur, Maxx and Minx do not need to upgrade.Here, " continuously for several times (L time) constant then begin again to rise " as the condition of upgrading Minx, is can subtract gradually under certain conditions because of lambda sensor to cool off, for example winter outdoor idling, its internal resistance meeting becomes greatly gradually, causes the output signal of rare state correspondence to rise at a slow speed.
The purpose of condition OX 〉=Minx+d or OX≤Maxx-d is set in the above-mentioned judgement, is restriction Maxx-Minx 〉=d.
After above-mentioned renewal treatment step about Maxx, Minx and k is finished, will continue, turn back to the step 31 among Fig. 3 by step 78.
The fuel injection quantity controlling method and the system of the present invention's closed loop electrically-controlled fuel-oil jetting IC engine are applicable to the internal-combustion engine of the spark ignition equivalent proportion burning control of single cylinder and multi-cylinder to be particularly useful for automobile and motorcycle spark-ignited internal combustion engine.
The purpose of the foregoing description is for the present invention is described, but does not limit the present invention.That all the present invention's of utilization design and spirit are carried out, conspicuous change design for the those of ordinary skill of related domain still belong to the protection domain of the present invention's claim.
Claims (16)
1. the fuel injection quantity controlling method of a closed loop electrically-controlled fuel-oil jetting IC engine, it is characterized in that, obtain the output signal of current lambda sensor by timing or crank angle synchronized sampling analog-to-digital conversion, judge whether described lambda sensor is in upstate, if it is available, then judge the rare dense of mixed gas, according to described judged result, the feedback regulation fuel injection quantity, and dynamically update the rare dense critical condition of judgement mixed gas, may further comprise the steps at least: whether the signal of judging current lambda sensor is within the effective number range that sets in advance; The difference of the critical numerical value that the sampled value of more current lambda sensor and front have been determined; If the sampled value of current lambda sensor, judges then that current mixed gas is dense partially greater than described critical numerical value, stop adjusting of fuel injection quantity incremental feedback or the adjusting of beginning decrement immediately; If the sampled value of current lambda sensor, judges then that current mixed gas is rare partially less than described critical value, stop feedback regulation of fuel injection quantity decrement or beginning incremental adjustments immediately; Sampled value history according to the sampled value of current lambda sensor and nearest lambda sensor recomputates or revises described critical numerical value, obtains new being used for and judges the rare dense critical numerical value of mixed gas next time.
2. the fuel injection quantity controlling method of closed loop electrically-controlled fuel-oil jetting IC engine according to claim 1, it is characterized in that, described critical numerical value determines that according to maximum and minimum the last or that occur for several times that described lambda sensor enters behind the upstate described critical numerical value is between described maximum and the minimum.
3. as the fuel injection quantity controlling method of closed loop electrically-controlled fuel-oil jetting IC engine as described in the claim 2, it is characterized in that described critical numerical value equals a described maximum and a minimizing arithmetic weighted mean.
4. as the fuel injection quantity controlling method of closed loop electrically-controlled fuel-oil jetting IC engine as described in the claim 3, it is characterized in that, the Weighting factor of described maximum more than or equal to 0.4 smaller or equal to 0.8, the Weighting factor of described arithmetic weighted mean is relevant with minimizing difference with described maximum, described maximum and minimizing difference are big more, the Weighting factor of described maximum is also just big more, and described minimizing Weighting factor is also just more little.
5. as the fuel injection quantity controlling method of closed loop electrically-controlled fuel-oil jetting IC engine as described in the claim 3, it is characterized in that, definite step of described maximum comprises: relatively the sampled value of this lambda sensor and last time lambda sensor the difference in size of sampled value, if this numerical value is big, then compare with the maximum of determining last time again, if the maximum that determined this numeric ratio last time is also big, then with the sampled value of this lambda sensor as new maximum, or certain average computation of sampled value by this lambda sensor and the maximum determined last time obtains a new maximum.
6. as the fuel injection quantity controlling method of closed loop electrically-controlled fuel-oil jetting IC engine as described in the claim 5, it is characterized in that, definite step of described maximum also comprises: relatively the sampled value of this lambda sensor and last time lambda sensor the difference in size of sampled value, if this numerical value is little, whether the sampled value of several lambda sensor did not diminish before then judging again, if do not diminish, judge again that then whether current maximum and minimizing difference are greater than certain default numerical value, if greater than described certain default numerical value, then with the sampled value of this lambda sensor as new maximum, or certain average computation of sampled value by this lambda sensor and the maximum determined last time obtains a new maximum.
7. as the fuel injection quantity controlling method of closed loop electrically-controlled fuel-oil jetting IC engine as described in the claim 6, it is characterized in that, the initial value of described maximum is taken as that the sampled value of first lambda sensor adds a predetermined value behind the engine start, but must not be, or directly be taken as the maximum value of effective span of lambda sensor sampled value greater than the maximum value of effective span of lambda sensor sampled value.
8. as the fuel injection quantity controlling method of closed loop electrically-controlled fuel-oil jetting IC engine as described in the claim 3, it is characterized in that, described minimizing determining step comprises: relatively the sampled value of this lambda sensor and last time lambda sensor the difference in size of sampled value, if this numerical value is little, then compare with the minimum of determining last time again, if the minimum that determined this numeric ratio last time is also little, then with the sampled value of this lambda sensor as new minimum, or obtain a new minimum by the sampled value of this lambda sensor and minimizing certain average computation of determining last time.
9. as the fuel injection quantity controlling method of closed loop electrically-controlled fuel-oil jetting IC engine as described in the claim 8, it is characterized in that, described minimizing determining step also comprises: relatively the sampled value of this lambda sensor and last time lambda sensor the difference in size of sampled value, if this numerical value is big, whether the sampled value of several lambda sensor becomes serious offense before then judging again, if do not become serious offense, judge again that then whether current maximum and minimizing difference are greater than certain default numerical value, if greater than described certain default numerical value, then with the sampled value of this lambda sensor as new minimum, or obtain a new minimum by the sampled value of this lambda sensor and minimizing certain average computation of determining last time.
10. as the fuel injection quantity controlling method of closed loop electrically-controlled fuel-oil jetting IC engine as described in the claim 9, it is characterized in that, described minimizing initial value is taken as that the sampled value of first lambda sensor deducts a predetermined value behind the engine start, or the maximum value that directly is taken as effective span of lambda sensor sampled value deducts a predetermined value, but must not be less than zero.
11. fuel injection quantity controlling method as the arbitrary closed loop electrically-controlled fuel-oil jetting IC engine as described in the claim 1 to 10, it is characterized in that, described maximum and minimizing determining step comprise: continuous (for example 3 times) for several times are constant if described maximum is upgraded the sampled value of post oxygen sensor, and sampled value is less than critical value, and then described maximum reduces one and fixedly plants; If the sampled value that described minimum is upgraded post oxygen sensor continuously for several times (for example 3 times) constant, and sampled value is greater than critical value, then described minimum increases by one and fixedly plants.
12. fuel injection quantity controlling method as the arbitrary closed loop electrically-controlled fuel-oil jetting IC engine as described in the claim 1 to 10, it is characterized in that, when judge current mixed gas rare dense according to the sampled value of this lambda sensor and described critical numerical value after, to carry out feedback regulation to fuel injection amount, the scope of described feedback regulation to fuel injection quantity is subjected to the restriction of current maximum and minimizing difference, described maximum and minimizing difference are big more, then allow the scope of feedback regulation of fuel injection quantity also big more, described maximum and minimizing difference stop feedback regulation during less than certain default numerical value.
13. fuel injection quantity controlling method as closed loop electrically-controlled fuel-oil jetting IC engine as described in the claim 12, it is characterized in that, when judge current mixed gas rare dense according to lambda sensor after, the described maximum after the scope of described feedback regulation to fuel injection quantity is begun by closed-loop feedback also and the influence of minimizing update times, update times does not reach predefined number of times, and the scope of then described feedback regulation to fuel injection quantity will be limited forr a short time.
14. the fuel injection quantity control system of the automatically controlled internal-combustion engine of a closed loop control fuel injection quantity, at least comprise fuel injector, engine electric-controlled unit ECU, the switching mode lambda sensor, it is characterized in that, be provided with analog-to-digital conversion (A/D conversion) conditioning circuit of measuring described lambda sensor output voltage among the described ECU, and the digital logic treatment device that is used for determining fuel injection quantity, described ECU regularly or with the output signal value of the current lambda sensor of crank angle synchronization gain, judge whether described lambda sensor is in upstate, if it is available, the difference of the critical numerical value determined of the sampled value of more current lambda sensor and front again, if the sampled value of current lambda sensor, judges then that current mixed gas is dense partially greater than described critical numerical value, stop adjusting of fuel injection quantity incremental feedback or the adjusting of beginning decrement immediately; If the sampled value of current lambda sensor, judges then that current mixed gas is rare partially less than described critical value, stop feedback regulation of fuel injection quantity decrement or beginning incremental adjustments immediately, keep mixed gas to level off to the theoretical chemistry equivalent proportion as much as possible with this; ECU dynamically updates and judges the rare dense critical numerical value of mixed gas then, sampled value history according to the sampled value of current lambda sensor and nearest lambda sensor, recomputate or revise described critical numerical value, obtain new being used for and judge the rare dense critical numerical value of mixed gas next time.
15. fuel injection quantity control system as the automatically controlled internal-combustion engine of closed loop control fuel injection quantity as described in the claim 14, it is characterized in that, the analog-to-digital conversion of described lambda sensor output voltage (A/D conversion) conditioning circuit comprises by two resistance, or a resistance and two diodes, the reference voltage circuit of the judgement lambda sensor state that constitutes, and a resistance is at the comparison reference resistance of mega-ohms, a current limliting small resistor, with a maintenance capacitor, described lambda sensor output voltage is sampled by described ECU through described current limliting small resistor.
16. fuel injection quantity control system as the automatically controlled internal-combustion engine of closed loop control fuel injection quantity as described in the claim 15, comprise a system failure display unit, it is characterized in that, logical process process among the described ECU comprises: if the sampled value of current lambda sensor has exceeded preset value range, perhaps fuel injection quantity has been adjusted to maximum or minimum limit value, then ECU immediately or finish closed loop control and enter open loop control mode after continuing the regular hour and exports one or several closed-loop feedback trouble signals; If the maximum of the sampled value of described lambda sensor, described lambda sensor sampled value and minimizing difference and described critical numerical value have all had rational value again, then ECU cancels the closed-loop feedback trouble signal at once, and commencement of fuel injection amount closed loop control again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910096248 CN101825032B (en) | 2009-03-02 | 2009-03-02 | Method and system for closed-loop control over injection amount of electronic fuel injection internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910096248 CN101825032B (en) | 2009-03-02 | 2009-03-02 | Method and system for closed-loop control over injection amount of electronic fuel injection internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101825032A true CN101825032A (en) | 2010-09-08 |
| CN101825032B CN101825032B (en) | 2013-11-06 |
Family
ID=42689154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910096248 Expired - Fee Related CN101825032B (en) | 2009-03-02 | 2009-03-02 | Method and system for closed-loop control over injection amount of electronic fuel injection internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101825032B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678355A (en) * | 2012-05-04 | 2012-09-19 | 联合汽车电子有限公司 | Automobile oil injection control system and method |
| US8586394B2 (en) | 2010-01-29 | 2013-11-19 | Kerdea Technologies, Inc. | Method for producing a subminiature “micro-chip” oxygen sensor for control of internal combustion engines or other combustion processes, oxygen sensor and an exhaust safety switch |
| US8959987B2 (en) | 2012-11-12 | 2015-02-24 | Kerdea Technologies, Inc. | Oxygen sensing method and apparatus |
| CN109324602A (en) * | 2018-11-28 | 2019-02-12 | 潍柴西港新能源动力有限公司 | A kind of the lambda sensor method for heating and controlling and system of hybrid electric vehicle |
| CN109736960A (en) * | 2019-01-28 | 2019-05-10 | 浙江吉利汽车研究院有限公司 | A kind of vehicle motor method for controlling of operation, device and terminal |
| CN112343725A (en) * | 2019-08-07 | 2021-02-09 | 联合汽车电子有限公司 | Control system and control method |
| CN114704402A (en) * | 2022-03-30 | 2022-07-05 | 潍柴动力股份有限公司 | Engine protection method and device, vehicle and storage medium |
| CN115981394A (en) * | 2023-03-21 | 2023-04-18 | 中国第一汽车股份有限公司 | Oxygen sensor heating control method and control device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000110647A (en) * | 1998-09-30 | 2000-04-18 | Mazda Motor Corp | Control device for engine |
| US6637195B2 (en) * | 2001-04-27 | 2003-10-28 | Nissan Motor Co., Ltd. | Apparatus and method for engine exhaust purification |
| CN2630506Y (en) * | 2003-03-28 | 2004-08-04 | 程凤岐 | High compression ratio ignition type flexible fuel engine |
| CN101029840A (en) * | 2006-03-02 | 2007-09-05 | 黄金火 | Gas flow sensor with integrated control and its integrated controlling method |
-
2009
- 2009-03-02 CN CN 200910096248 patent/CN101825032B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000110647A (en) * | 1998-09-30 | 2000-04-18 | Mazda Motor Corp | Control device for engine |
| US6637195B2 (en) * | 2001-04-27 | 2003-10-28 | Nissan Motor Co., Ltd. | Apparatus and method for engine exhaust purification |
| CN2630506Y (en) * | 2003-03-28 | 2004-08-04 | 程凤岐 | High compression ratio ignition type flexible fuel engine |
| CN101029840A (en) * | 2006-03-02 | 2007-09-05 | 黄金火 | Gas flow sensor with integrated control and its integrated controlling method |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10526945B2 (en) | 2010-01-29 | 2020-01-07 | Kerdea Technologies, Inc. | Microchip oxygen sensor for control of internal combustion engines or other combustion processes |
| US8586394B2 (en) | 2010-01-29 | 2013-11-19 | Kerdea Technologies, Inc. | Method for producing a subminiature “micro-chip” oxygen sensor for control of internal combustion engines or other combustion processes, oxygen sensor and an exhaust safety switch |
| US10138782B2 (en) | 2010-01-29 | 2018-11-27 | Kerdea Technologies, Inc. | Microchip oxygen sensor for control of internal combustion engines or other combustion processes |
| CN102678355B (en) * | 2012-05-04 | 2015-11-18 | 联合汽车电子有限公司 | Automobile oil injection control system and method |
| CN102678355A (en) * | 2012-05-04 | 2012-09-19 | 联合汽车电子有限公司 | Automobile oil injection control system and method |
| US8959987B2 (en) | 2012-11-12 | 2015-02-24 | Kerdea Technologies, Inc. | Oxygen sensing method and apparatus |
| US9291526B2 (en) | 2012-11-12 | 2016-03-22 | Kerdea Technologies, Inc. | Oxygen sensing method and system |
| US9625352B2 (en) | 2012-11-12 | 2017-04-18 | Kerdea Technologies, Inc. | Wideband oxygen sensing method and apparatus |
| US10067034B2 (en) | 2012-11-12 | 2018-09-04 | Kerdea Technologies, Inc. | Wideband oxygen sensing |
| CN109324602A (en) * | 2018-11-28 | 2019-02-12 | 潍柴西港新能源动力有限公司 | A kind of the lambda sensor method for heating and controlling and system of hybrid electric vehicle |
| CN109324602B (en) * | 2018-11-28 | 2024-04-09 | 潍柴西港新能源动力有限公司 | Oxygen sensor heating control method and system for hybrid electric vehicle |
| CN109736960A (en) * | 2019-01-28 | 2019-05-10 | 浙江吉利汽车研究院有限公司 | A kind of vehicle motor method for controlling of operation, device and terminal |
| CN112343725A (en) * | 2019-08-07 | 2021-02-09 | 联合汽车电子有限公司 | Control system and control method |
| CN112343725B (en) * | 2019-08-07 | 2023-03-03 | 联合汽车电子有限公司 | Control system and control method |
| CN114704402A (en) * | 2022-03-30 | 2022-07-05 | 潍柴动力股份有限公司 | Engine protection method and device, vehicle and storage medium |
| CN115981394A (en) * | 2023-03-21 | 2023-04-18 | 中国第一汽车股份有限公司 | Oxygen sensor heating control method and control device |
| CN115981394B (en) * | 2023-03-21 | 2023-06-09 | 中国第一汽车股份有限公司 | Oxygen sensor heating control method and control device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101825032B (en) | 2013-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101825032B (en) | Method and system for closed-loop control over injection amount of electronic fuel injection internal combustion engine | |
| US6223730B1 (en) | Fuel injection control system of internal combustion engine | |
| US7150264B2 (en) | Control device for internal combustion engine | |
| CN100545436C (en) | The control apparatus that is used for internal-combustion engine | |
| CN101438040B (en) | Control system for operating internal combustion engine | |
| CN101809267B (en) | Control apparatus and control method for internal combustion engine | |
| EP1081364B1 (en) | Control for spark-ignited direct fuel injection internal combustion engine | |
| US8239119B2 (en) | Method and system for adapting small fuel injection quantities | |
| GB2317028A (en) | Fuel injection control in a direct injection type gasoline internal combustion engine | |
| WO1999045256A1 (en) | Method for a controlled transition between operating modes of a dual fuel engine | |
| DE19803653B4 (en) | Control device for direct injection engines | |
| CN100513774C (en) | Ignition timing controller of internal combustion engine | |
| CN100529381C (en) | Control apparatus for internal combustion engine | |
| US4911131A (en) | Fuel control apparatus for internal combustion engine | |
| US6668795B1 (en) | Controller with feed-back system | |
| CN102472184B (en) | Fuel-injection-quantity control device for internal combustion engine | |
| US5558062A (en) | Integrated small engine control | |
| EP1284363B1 (en) | Ignition timing control device for internal combustion engine | |
| EP1643106B1 (en) | Engine air-fuel ratio control system | |
| US7693644B2 (en) | Regulator device for compensating for dispersions of injectors | |
| DE60109917T2 (en) | TORQUE REGULATOR FOR INTERNAL COMBUSTION ENGINE | |
| US6947826B2 (en) | Method for compensating injection quality in each individual cylinder in internal combustion engines | |
| EP2538058A1 (en) | Idle rotation speed control device for bifuel engine | |
| KR20020068332A (en) | Method for adapting mixture control in internal combustion engines with direct fuel injection | |
| CA3140634C (en) | Adaptive fuel control module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SHAOXING PINGGUO ELECTRONIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHEJIANG FAI ELECTRONICS CO., LTD. Effective date: 20110624 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 310018 NO. 22, 22ND STREET, HANGZHOU ECONOMIC AND TECHNOLOGICAL DEVELOPMENTZONE (XIASHA), HANGZHOU CITY, ZHEJIANG PROVINCE TO: 312300 NO. 105, NO. 299, HAIBIN AVENUE, LIHAI TOWN, SHAOXING BINHAI NEW CITY, SHAOXING CITY, ZHEJIANG PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110624 Address after: 312300, No. 299, Haibin Avenue, Lek Hai Town, Shaoxing Binhai New Town, Zhejiang, Shaoxing, 105 Applicant after: Shaoxing Pingguo Electronics Technology Co.,Ltd. Address before: 310018, No. 22, No. 22, Hangzhou economic and Technological Development Zone (Xiasha), Zhejiang, Hangzhou Applicant before: Zhejiang FAI Electronics Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG FAI ELECTRONICS CO., LTD. Free format text: FORMER OWNER: SHAOXING PINGGUO ELECTRONIC TECHNOLOGY CO., LTD. Effective date: 20120419 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 312300 SHAOXING, ZHEJIANG PROVINCE TO: 310013 HANGZHOU, ZHEJIANG PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20120419 Address after: 310013, room 413, 612 Pier Road, Hangzhou, Zhejiang, Xihu District Applicant after: Zhejiang FAI Electronics Co., Ltd. Address before: 312300, No. 299, Haibin Avenue, Lek Hai Town, Shaoxing Binhai New Town, Zhejiang, Shaoxing, 105 Applicant before: Shaoxing Pingguo Electronics Technology Co.,Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: SAIERFU (XIAMEN) INDUSTRY CO., LTD. Free format text: FORMER OWNER: ZHEJIANG FAI ELECTRONICS CO., LTD. Effective date: 20130625 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 310013 HANGZHOU, ZHEJIANG PROVINCE TO: 361007 XIAMEN, FUJIAN PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20130625 Address after: Dongpu road Xiamen City, Fujian province 361007 Siming District No. 22 two floor Applicant after: Saierfu (Xiamen) Industry Co., Ltd. Address before: 310013, room 413, 612 Pier Road, Hangzhou, Zhejiang, Xihu District Applicant before: Zhejiang FAI Electronics Co., Ltd. |
|
| 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: 20131106 Termination date: 20150302 |
|
| EXPY | Termination of patent right or utility model |