CN102536772B - Pump units - Google Patents
Pump units Download PDFInfo
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- CN102536772B CN102536772B CN201110425522.2A CN201110425522A CN102536772B CN 102536772 B CN102536772 B CN 102536772B CN 201110425522 A CN201110425522 A CN 201110425522A CN 102536772 B CN102536772 B CN 102536772B
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- Prior art keywords
- pressure
- mentioned
- brushless motor
- controlling component
- detecting part
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention provides a pump unit, capable of properly detecting an abnormality occuring in a pressure detection device and continuously normally. Even in a state in which an abnormality occurs in the pressure detection device, an uncontrollable state is prevented and a normal control can be continued, wherein the pressure detection device detects a discharge pressure of the pump. In a pump unit including a sensor-less brushless motor, and a control device for controlling the brushless motor, the pressure detection device is provided on a discharge side of the pump and the control device controls the brushless motor so that a detected pressure becomes relatively equal to a target pressure. The control device is further able to determine a value of current supplied to the brushless motor and a rotational speed of the brushless motor. When an abnormality occurs in the pressure detection device, the control device determines an estimated pressure on the discharge side of the pump based on the determined current value and the determined rotational speed. It is then able to control the brushless motor so that the determined estimated pressure becomes equal to the target pressure.
Description
Technical field
The present invention relates to and a kind ofly carry out controlling making jet pressure to be the pump unit of goal pressure, the exception particularly detecting the pressure detecting part of jet pressure judge and abnormal time control.
Background technique
In the fuel injection system of internal-combustion engine in recent years, there is the fuel injection system using ejecting system in so-called cylinder, this interior ejecting system is to the fuel of the machine barrel inner direct more high pressure of high pressure.
In cylinder ejecting system fuel supplying device in, in series configure low-pressure fuel pump and high pressure fuel pump, by low-pressure fuel pump, the fuel in fuel tank is temporarily controlled as low voltage side goal pressure, by the high pressure fuel pump be configured near the position of sparger, the fuel of low voltage side goal pressure is controlled, for high pressure side goal pressure, to spray the fuel of this high pressure side goal pressure from sparger.
In existing fuel supplying device, high pressure fuel pump uses high side pressure sensor to carry out feedback control to reach high pressure side goal pressure, and low-pressure fuel pump uses low-pressure lateral pressure sensor to carry out feedback control to reach low voltage side goal pressure.
Such as in the prior art described in patent documentation 1, disclose a kind of fuel-injection device for internal combustion engine, fuel pressurization in fuel tank is delivered to area of low pressure by feed pump by this fuel injection system, and by high-pressure service pump, the fuel pressurization of area of low pressure is delivered to high-pressure area, from the fuel in sparger inject high pressure region.Special pressure transducer for detecting the pressure in area of low pressure is set in area of low pressure, the special high pressure sensor for detecting the pressure in high-pressure area is set in high-pressure area.And, in area of low pressure, control feed pump according to the pressure detected by (area of low pressure) pressure transducer, in high-pressure area, control high-pressure service pump according to the pressure detected by (high-pressure area) high pressure sensor.
In addition, in the prior art described in patent documentation 2, such as disclose a kind of brake liquid-pressure control device of vehicle, this brake liquid-pressure control device does not use the hydrostatic sensor that the price of the supply pressure for detecting hydraulic power (gear pump) is higher, but based on the rotating speed of the pressure detected by pressure transducer, pump motor, supply electric current and the hydraulic pressure that estimates controls braking force, realize that cost reduces, device simplifies thus.
In addition, a kind of fuel supply control device is prior art discloses such as described in patent documentation 3, it estimates fuel pressure according to revolution speed, the actual fuel pressure detected and estimation fuel pressure is compared, judge the exception of the relief valve of pump by pressure transducer.
Patent documentation 1: Japanese Unexamined Patent Application Publication 2009-540205 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2006-175905 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2009-281184 publication
Summary of the invention
the problem that invention will solve
About patent documentation 1 ~ patent documentation 3, when pressure transducer occurs abnormal, patent documentation 1 ~ patent documentation 3 all can not detect the correct jet pressure (hydraulic pressure) of pump, thus likely cannot normally control.But, the process when determination methods of the exception of pressure transducer, pressure transducer generation exception is not disclosed in patent documentation 1 ~ patent documentation 3.
The present invention invents in view of this problem, object is to provide a kind of pressure detecting part that can suitably detect the jet pressure of pump detects to there occurs abnormal pump unit, even and if a kind of pressure detecting part there occurs and abnormal also can not be absorbed in uncontrollable state and the normal pump unit controlled can be continued.
for the scheme of dealing with problems
In order to solve the problem, pump unit involved in the present invention takes following means.
First, the pump unit of the first invention of the present invention possess without sensor brushless motor and control the controlling component of above-mentioned brushless motor, arrange pressure detecting part in the ejection side of said pump unit, above-mentioned controlling component controls pressure that above-mentioned brushless motor makes to be detected by above-mentioned pressure detecting part and detected pressures is goal pressure.
And, controlling component can also detect the rotating speed of magnitude of current and the above-mentioned brushless motor being supplied to above-mentioned brushless motor, when above-mentioned pressure detecting part is abnormal, above-mentioned controlling component is obtained according to detected above-mentioned magnitude of current and detected above-mentioned rotating speed and is estimated the pressure of ejection side and the estimated pressure obtained, and to control the estimated pressure that above-mentioned brushless motor makes to obtain be above-mentioned goal pressure.
According to this first invention, when pressure detecting part occurs abnormal, use the estimated pressure obtained according to the rotating speed of the magnitude of current and brushless motor that are supplied to brushless motor to control, make jet pressure be goal pressure.
Compared with the detected pressures obtained with utilizing pressure detecting part, the validity of estimated pressure declines slightly, even if but occur abnormal at pressure detecting part and under the state that cannot use detected pressures, estimated pressure also can be used to continue normal control.
Then, the pump unit of the second invention of the present invention possess without sensor brushless motor and control the controlling component of above-mentioned brushless motor, the ejection side of said pump unit is provided with pressure detecting part, and above-mentioned controlling component controls pressure that above-mentioned brushless motor makes to be detected by above-mentioned pressure detecting part and detected pressures is goal pressure.
And, controlling component can also detect the rotating speed of magnitude of current and the above-mentioned brushless motor being supplied to above-mentioned brushless motor, above-mentioned controlling component is obtained according to detected above-mentioned magnitude of current and detected above-mentioned rotating speed and is estimated the pressure of ejection side and the estimated pressure that obtains, judges that whether above-mentioned pressure detecting part is abnormal according to above-mentioned detected pressures and above-mentioned estimated pressure.
In this second invention, such as, according to the deviation of the rotating speed and magnitude of current that utilize the brushless motor estimated pressure estimated and the detected pressures detected by pressure detecting part, the abnormal validity judged can be improved further.Can to such as simple broken string abnormal (open circuit), short circuit abnormal (short circuit) and the testing signal exported whether close to should the signal etc. of the output level exception of carrying out more pinpoint accuracy judge.
Then, 3rd invention of the present invention is the pump unit involved by above-mentioned second invention, according to the deviation between above-mentioned goal pressure and above-mentioned detected pressures and the deviation between above-mentioned detected pressures and above-mentioned estimated pressure, above-mentioned controlling component judges that whether above-mentioned pressure detecting part is abnormal.
According to the 3rd invention, judge the exception of pressure detecting part according to the deviation of estimated pressure and detected pressures, also judge the exception of pressure detecting part according to the deviation of goal pressure and detected pressures, the judgement of more pinpoint accuracy can be carried out thus.
Accompanying drawing explanation
The figure of a mode of execution of the fuel injection system of Fig. 1 pump unit 20 of the present invention that has been application.
Fig. 2 is the figure of the example of the structure that pump unit 20 is described.
Fig. 3 is the figure of the example that the application and existing control block diagram are described.
Fig. 4 is electric current, rotating speed, the Pressure characteristics of the low-pressure fuel pump measured in advance.
Fig. 5 is the example of the processing procedure that low voltage side controlling component CL is described and the flow chart of the example of the processing procedure of the feedback processing in this processing procedure.
Fig. 6 is the figure that the exception illustrated in the processing procedure of low voltage side controlling component CL judges the example of the processing procedure of process.
Fig. 7 is the figure that specification exception judges other example of the processing procedure of process.
description of reference numerals
1: fuel supplying device; 10: fuel tank; 20: pump unit; 21: arithmetic unit (CPU); 22: position detecting circuit; 30: high pressure fuel pump unit; 40L, 40H: pressure detecting part; 50: external control device; 61 ~ 64: sparger; CH: high pressure side controlling component; CL: low voltage side controlling component (controlling component); HH: pipe arrangement (high-pressure area); HL: pipe arrangement (area of low pressure); MH: high pressure fuel pump; ML: low-pressure fuel pump (brushless motor without sensor); Tu1 ~ Tw2: drive circuit.
Embodiment
Accompanying drawing is used to be described embodiments of the present invention below.The figure of a mode of execution of the fuel injection system of the internal-combustion engine of Fig. 1 pump unit 20 of the present invention that has been application.In addition, pump unit of the present invention is the pump unit of the brushless motor possessed without sensor, is equivalent to the pump unit 20 (low-pressure fuel pump unit) shown in Fig. 1.
[structure (Fig. 1) of fuel injection system]
Fuel injection system shown in Fig. 1 has the fuel supplying device 1 be made up of pump unit 20 (low-pressure fuel pump unit) of the present invention and high pressure fuel pump 30.
The fuel of store fluid in fuel tank 10.
Pump unit 20 is made up of low-pressure fuel pump ML (being equivalent to the brushless motor without sensor) and low voltage side controlling component CL (being equivalent to controlling component).
Low voltage side goal pressure is inputted to low voltage side controlling component CL from being separated the external control device 50 (engine control computer etc.) arranged, this low voltage side controlling component CL controls low-pressure fuel pump ML to make the jet pressure (pressure in pipe arrangement HL) of low-pressure fuel pump ML for low voltage side goal pressure, is transported in pipe arrangement HL by the fuel pressurization in fuel tank 10 and (is equivalent to area of low pressure).
Low-pressure fuel pump ML is the brushless motor without sensor, and details is described below.
In addition, in the pipe arrangement HL of the ejection side of low-pressure fuel pump ML, arrange pressure detecting part 40L, low voltage side controlling component CL controls low-pressure fuel pump ML and makes the detected pressures detected by pressure detecting part 40L be low voltage side goal pressure.
High pressure fuel pump unit 30 is made up of high pressure fuel pump MH and high pressure side controlling component CH.
High pressure side goal pressure is inputted to high pressure side controlling component CH from being separated the external control device 50 arranged, this high pressure side controlling component CH controls high pressure fuel pump MH to make the jet pressure (pressure in pipe arrangement HH) of high pressure fuel pump MH for high pressure side goal pressure, is transported to by the fuel pressurization (being equivalent to area of low pressure) in pipe arrangement HH (being equivalent to high-pressure area) in pipe arrangement HL.
In addition, in the pipe arrangement HH of the ejection side of high pressure fuel pump MH, be provided with pressure detecting part 40H, high pressure side controlling component CH controls high pressure fuel pump MH, makes the detected pressures detected by pressure detecting part 40H be high pressure side goal pressure.
Sparger 61 ~ 64 according to from the drive singal of external control device 50, sprays the fuel under high pressure in the feeder 60 that is connected with pipe arrangement HH.
In addition, such as, the fuel pressure in feeder 60 is considerably beyond imagination pressure, this fuel is made to return pipe arrangement HL via valve 70.
In addition, external control device 50 is transfused to the testing signal from various input block (sensor), export the control signal of various output block (driver etc.), and export the drive singal of sparger 61 ~ 64, low voltage side goal pressure and high pressure side goal pressure.
[structure (Fig. 2) of pump unit 20]
As shown in Figure 2, low-pressure fuel pump ML is the brushless motor without sensor, such as, have the coil of U phase, V phase, this three-phase of W phase.
The low voltage side controlling component CL controlling this brushless motor has the arithmetic units such as CPU 21, for detecting the position detecting circuit 22 of the rotational position of brushless motor, the drive circuit (Tu1 ~ Tw2) to U phase, V phase, W phase output driving current.
Arithmetic unit 21 detects the rotational position of brushless motor according to the testing signal from position detecting circuit 22, exports the drive singal corresponding to rotational position from drive circuit (Tu1 ~ Tw2).
Such as position detecting circuit 22 is testing circuits of counter electromotive force current, the input pulse signal when each brushless motor arrives regulation rotational position, arithmetic unit 21 switches drive singal (pwm signal etc.) when each this pulse signal input.
In addition, input low voltage side goal pressure from external control device 50 to arithmetic unit 21, input testing signal from pressure detecting part 40L to arithmetic unit 21.
Arithmetic unit 21 can according to the rotating speed obtaining brushless motor the interval time of the pulse signal from position detecting circuit 22.
In addition, arithmetic unit 21 can according to self outputting to the signal of drive circuit (Tu1 ~ Tw2) (such as when pwm signal, the dutycycle (conduction pulses width is relative to the ratio [%] of pulse interval) of pwm signal), obtain the magnitude of current being supplied to brushless motor.
Like this, without the need to newly arranging testing circuit etc., arithmetic unit 21 just can utilize the input state of spinning control script with regard to the position detecting circuit 22 of needs, the output state to drive circuit (Tu1 ~ Tw2) to detect rotating speed and the magnitude of current of brushless motor, thus controls the brushless motor without sensor.
[control block diagram ((A) of Fig. 3) of the application and existing control block diagram ((B) of Fig. 3)]
(A) of Fig. 3 represents the control block diagram to the application that low-pressure fuel pump ML controls, and (B) of Fig. 3 represents existing control block diagram.
[existing control block diagram ((B) of Fig. 3)]
As shown in the control block diagram of (B) of Fig. 3, obtained goal pressure (being low voltage side goal pressure in this case) and the deviation of detected pressures (jet pressure of the reality of the low-pressure fuel pump ML detected by pressure detecting part 40L) by node N1A in the past, the deviation obtained was input to computing module B1.
Computing module B1 calculates controlled quentity controlled variable according to the deviation of input, calculate the respective optiumum control amount of drive circuit (Tu1 ~ Tw2) according to the rotation position detection signal from position detecting circuit 22, the controlled quentity controlled variable calculated is input to driver module B2 (drive circuit (Tu1 ~ Tw2)).
Driver module B2 according to input controlled quentity controlled variable to low-pressure fuel pump ML output drive signal.
Then, detect the jet pressure of low-pressure fuel pump ML by pressure detecting part 40L, by pressure (detected pressures) reverse feedback of reality that detects to node N1A.
[control block diagram ((A) of Fig. 3) of the application]
As shown in (A) of Fig. 3, in the control block diagram of the application, relative in the past ((B) of Fig. 3), with the addition of the computing module B3 calculating estimated pressure, the switching part SW that reverse feedback is selected to the pressure of node N1 and the computing module B4 to switching part SW output switching signal.By this structure, by the some reverse feedbacks in (estimated pressure), (detected pressures) to node N1.Below, mainly the difference with existing control block diagram ((B) of Fig. 3) is described.
The magnitude of current (being supplied to the magnitude of current of the low-pressure fuel pump ML) controlled quentity controlled variable obtained based on computing module B1 obtained and the rotating speed (rotating speed of low-pressure fuel pump ML) obtained based on the testing signal from position detecting circuit 22 are input to computing module B3.Then, computing module B3 calculates jet pressure (estimated pressure) according to magnitude of current and rotating speed.In addition, the computational methods about estimated pressure are described below.
The estimated pressure calculated by computing module B3, the detected pressures detected by pressure detecting part 40L and the goal pressure (low voltage side goal pressure) that is input to node N1 are input to computing module B4, judge whether pressure detecting part 40L exception occurs by this computing module B4.Computing module B4 is when being judged as pressure detecting part 40L no exceptions, switching part SW is set in (detected pressures) side, by (detected pressures) reverse feedback to node N1, when being judged as that pressure detecting part 40L there occurs abnormal, switching part SW is set in (estimated pressure) side, by (estimated pressure) reverse feedback to node N1.
In addition, the process (judging the process of the exception of pressure detecting part 40L) about computing module B4 is described below.
[obtaining the method (Fig. 4) of pressure according to magnitude of current and rotating speed]
Fig. 4 is used to be described the method (process of the computing module B3 in Fig. 3 (A)) calculating estimated pressure according to magnitude of current and rotating speed below.
Performance plot shown in Fig. 4 is the performance plot of low-pressure fuel pump ML, the relation of the electric current [A] when representing that jet pressure is A1 [KPa] with the first dotted line and rotating speed [rpm], the relation of the electric current [A] when representing that jet pressure is A2 [KPa] with the second dotted line and rotating speed [rpm], the relation of the electric current [A] when jet pressure indicated by the solid line is A3 [KPa] and rotating speed [rpm], the relation of the electric current [A] when representing that jet pressure is A4 [KPa] with dot and dash line and rotating speed [rpm], the relation of the electric current [A] when representing that jet pressure is A5 [KPa] with double dot dash line and rotating speed [rpm].In addition, A1 < A2 < A3 < A4 < A5.
Even if rotating speed is identical but the side that electric current is large (side that load is high) pressure (jet pressure) high, even if electric current is identical but the side that rotating speed is little (side that load is high) pressure (jet pressure) high.
Low-pressure fuel pump characteristics shown in arithmetic unit 21 storage figure 4, can obtain pressure in the following manner according to the magnitude of current detected and rotating speed.Such as, when (magnitude of current [A], the rotating speed [rpm]) that detect is for (C1 [A], R1 [rpm]), as shown in the example of fig. 4, by carrying out interpolation between the some P (A2) on the A2 [KPa] obtained based on (C1, R1) position and the some P (A3) on A3 [KPa], the pressure of (C1, R1) can be obtained.
Above, when knowing rotating speed but do not know load (electric current) of brushless motor, jet pressure is estimated it is very difficult more accurately, when knowing electric current (load) but do not know rotating speed (flow), jet pressure is estimated it is also very difficult more accurately.In this application, the jet pressure more accurately of brushless motor can be estimated according to rotating speed (flow) and electric current (load).
[processing procedure ((B) of Fig. 5) of the feedback processing in the example ((A) of Fig. 5) of the processing procedure of low voltage side controlling component CL and this processing procedure]
The example of Fig. 5 to the processing procedure of low voltage side controlling component CL (arithmetic unit 21) is used to be described below.
The moment of regulation when low voltage side controlling component CL is every specific time interval or in the input of each testing signal from position detecting circuit 22 etc. starts the process carried out shown in (A) of Fig. 5.
In step slo, low voltage side controlling component CL obtains goal pressure (being low voltage side goal pressure in this case) from external control device 50, enters step S11.
In step s 11, low voltage side controlling component CL obtains the testing signal of pressure detecting part 40L, obtains detected pressures (testing signal is converted into detected pressures), enter step S12 according to testing signal.
In step s 12, low voltage side controlling component CL obtains the current rotating speed of low-pressure fuel pump ML according to the interval (cycle) of the pulse signal from position detecting circuit 22.In addition, magnitude of current is obtained according to the drive singal self outputting to drive circuit (Tu1 ~ Tw2).And, according to the testing signal of the voltage check part detected from the supply voltage used fuel supplying device 1, obtain voltage and the measuring voltage of power supply, according to the reference potential preset and measuring voltage, magnitude of current is corrected.Such as, when the low-pressure fuel pump characteristics shown in Fig. 4 be with 12V be benchmark carry out the characteristic measured, reference potential is 12 [V].So, such as, when measuring voltage is 10 [V], in the following manner magnitude of current is corrected.
Magnitude of current (after correcting)=magnitude of current (before correction) × (12 [V]/10 [V])
Then, obtain estimated pressure according to the magnitude of current after the rotating speed obtained, correction and the low-pressure fuel pump characteristics shown in Fig. 4, enter step S20.
The process of above-mentioned steps S12 is equivalent to the process of the computing module B3 shown in (A) of Fig. 3.
In addition, the correction utilizing measuring voltage to carry out magnitude of current can also be omitted.
In step S20, low voltage side controlling component CL judges whether pressure detecting part 40L exception occurs, and enters step S30.
In step s 30, low voltage side controlling component CL carries out feedback control to low-pressure fuel pump ML, and the jet pressure making low-pressure fuel pump ML is low voltage side goal pressure, ends process.
(B) feedback processing to the step S30 in the flow chart of (A) of Fig. 5 of Fig. 5 is used to be described below.In addition, the process of step S30 is equivalent to the process that switching part SW, node N1, computing module B1 and driver module B2 in Fig. 3 (A) carry out.
In step S31, low voltage side controlling component CL judges pressure detecting part 40L whether normal (being judged by step S20).Entering step S32 when being judged as normal (YES), entering step S33 when being judged as abnormal (no).
When entering step S32, low voltage side controlling component CL obtains the deviation of goal pressure (low voltage side goal pressure) and the detected pressures obtained by step S11 obtained by step S10, calculate the controlled quentity controlled variable of low-pressure fuel pump ML according to this deviation, enter step S34.
When entering step S33, low voltage side controlling component CL obtains the deviation of goal pressure (low voltage side goal pressure) and the estimated pressure calculated by step S12 obtained by step S10, calculate the controlled quentity controlled variable of low-pressure fuel pump ML according to this deviation, enter step S34.
In step S34, low voltage side controlling component CL, according to the controlled quentity controlled variable obtained and the rotation position detection signal detected by step S12, is driven low-pressure fuel pump ML to drive circuit (Tu1 ~ Tw2), ends process.
[judging the processing procedure (Fig. 6) of the exception of pressure detecting part 40L]
The exception of Fig. 6 to the step S20 in the flow chart of (A) of Fig. 5 is used to judge that process is described below.In addition, the process of step S20 is equivalent to the process that the computing module B4 in (A) of Fig. 3 carries out.
In the step s 21, low voltage side controlling component CL obtains the testing signal of pressure detecting part 40L, judges whether testing signal (detection voltage) exceedes upper limit threshold.In the example of present embodiment, detect voltage with the input of the analog voltage of 0 [V] ~ 5 [V] corresponding to pressure, the voltage 4.5 [V] that generally there will not be is set as the upper limit threshold detecting voltage.Entering step S21T when exceeding upper limit threshold (YES), entering step S22 when not exceeding upper limit threshold (no).
When entering step S21T, low voltage side controlling component CL enters step S21X when exceeding the state continuance first stipulated time (YES) of upper limit threshold, ends process when the state exceeding upper limit threshold does not continue the first stipulated time (no).
When entering step S21X, low voltage side controlling component CL is judged as that pressure detecting part 40L is abnormal, and end process (being judged as that broken string is abnormal in this case).
When entering step S22, low voltage side controlling component CL judges that whether the testing signal (detection voltage) of pressure detecting part 40L is lower than lower threshold.In the example of present embodiment, detect voltage with the input of the analog voltage of 0 [V] ~ 5 [V] corresponding to pressure, the voltage 0.5 [V] that generally there will not be is set as the lower threshold detecting voltage.Entering step S22T lower than during lower threshold (YES), enter step S23 when being not less than lower threshold (no).
When entering step S22T, low voltage side controlling component CL enters step S22X at the state continuance lower than lower threshold during the second stipulated time (YES), ends process when the state lower than lower threshold does not continue the second stipulated time (no).
When entering step S22X, low voltage side controlling component CL is judged as that pressure detecting part 40L is abnormal, and end process (being judged as that short circuit is abnormal in this case).
When entering step S23, low voltage side controlling component CL judges whether goal pressure (being low voltage side goal pressure in this case) is more than or equal to the first pressure difference (such as 50 [KPa]) with the deviation of detected pressures (pressure detected by pressure detecting part 40L).Entering step S23A when being more than or equal to the first pressure difference (YES), entering step S25T when being less than the first pressure difference (no).
When entering step S23A, low voltage side controlling component CL judges whether the deviation of detected pressures and estimated pressure (pressure according to rotating speed and magnitude of current estimate) is more than or equal to the second pressure difference (such as 30 [KPa]).Entering step S23T when being more than or equal to the second pressure difference (YES), entering step S24 when being less than the second pressure difference (no).
When entering step S23T (YES), judge whether this state (be more than or equal to the first pressure difference in step S23 and be more than or equal to the second pressure difference in step S23A) continue for for the 3rd stipulated time.Entering step S23X when continue for the 3rd stipulated time (YES), ending process when not continuing the 3rd stipulated time (no).
When entering step S23X, low voltage side controlling component CL judges that pressure detecting part 40L is abnormal, ends process.In this case, although the level of testing signal is in the scope of upper limit threshold and lower threshold, be judged as not exporting the exception (indefinite exception or characteristic abnormal) of the testing signal corresponding with pressure.
When entering step S24, low voltage side controlling component CL judges whether to supply maximum current.Such as, whether the dutycycle judging pwm signal is 100 [%] (maximum duty cycle).Entering step S24T when supplying maximum current (YES), entering step S25T when not supplying maximum current (no).
Judge when entering step S24T (YES) whether this state (supplying maximum current) continue for for the 4th stipulated time.Entering step S24X when continue for the 4th stipulated time (YES), ending process when not continuing the 4th stipulated time (no).
When entering step S24X, low voltage side controlling component CL is judged as that the system (pipe arrangement etc.) of fuel supplying device 1 is abnormal, end process (be judged as it not being that pressure detecting part 40L is abnormal in this case, but the system exceptions such as pipe arrangement leakage).
When entering step S25T, low voltage side controlling component CL judges whether the state (namely no abnormal state) of carrying out the judgement of this step S25 continue for for the 5th stipulated time.Entering step S25X when continue for the 5th stipulated time (YES), ending process when not continuing the 5th stipulated time (no).
When entering step S25X, low voltage side controlling component CL is judged as pressure detecting part 40L normal (no abnormal), ends process.
[judging other example (Fig. 7) of the processing procedure of the exception of pressure detecting part 40L]
Fig. 7 is used to judge that other example of processing procedure is described to the exception shown in the flow chart of Fig. 6 below.
Relative to the flow chart shown in Fig. 6, the flow chart shown in Fig. 7 is different in the following areas: the process (initial step) that with the addition of step S20A; Eliminate step S23, S23A, S24, S24T, S24X.Below, mainly the difference with the flow chart shown in Fig. 6 is described.
In step S20A, low voltage side controlling component CL judges whether goal pressure (being low voltage side goal pressure in this case) is more than or equal to the first pressure difference (such as 50 [KPa]) with the deviation of estimated pressure.Entering step S21 when being more than or equal to the first pressure difference (YES), entering step S25T when being less than the first pressure difference (no).
When entering step S21, low voltage side controlling component CL judges whether testing signal (detection voltage) exceedes upper limit threshold.Entering step S21T when exceeding upper limit threshold (YES), entering step S22 when not exceeding upper limit threshold (no).
When entering step S22, low voltage side controlling component CL judges that whether testing signal (detection voltage) is lower than lower threshold.Entering step S22T lower than during lower threshold (YES), enter step S23T when being not less than lower threshold (no).
The process of other step is identical with process illustrated in fig. 6, therefore omits the description.
Above, in the process of the flow chart shown in Fig. 7, simplify the process of the flow chart shown in Fig. 6, eliminate the judgement (step S24X) of system exception.
Above, the pump unit 20 illustrated in present embodiment, without the need to arranging new pressure detecting part, just more with high accuracy can judge whether pressure detecting part 40L exception occurs, thus can realize system simplification and cost degradation.
In addition, when being judged as that pressure detecting part 40L occurs abnormal, using estimated pressure to control low-pressure fuel pump ML, therefore can not be absorbed in control malfunctioning, can more safely proceed to control.
Pump unit 20 of the present invention is not limited to the outward appearance, structure, circuit, process etc. that illustrate in present embodiment, can carry out various changes, interpolation, deletion in the scope not changing purport of the present invention.Such as, the characteristic of low-pressure fuel pump ML is not limited to the performance plot shown in Fig. 4, and low voltage side controlling component CL, low-pressure fuel pump ML are not limited to the example of the structure shown in Fig. 2.
In addition, the pump unit 20 illustrated in present embodiment is not limited to the petrolift of internal-combustion engine, can be applied to the various pump unit used without the brushless motor of sensor.
Claims (3)
1. a pump unit, it possess without sensor brushless motor and control the controlling component of above-mentioned brushless motor, wherein,
The ejection side of said pump unit is provided with pressure detecting part,
Above-mentioned controlling component controls above-mentioned brushless motor, makes the pressure that detected by above-mentioned pressure detecting part and detected pressures equal goal pressure,
Above-mentioned controlling component can also detect the rotating speed of magnitude of current and the above-mentioned brushless motor being supplied to above-mentioned brushless motor,
When above-mentioned pressure detecting part is abnormal, above-mentioned controlling component is obtained according to detected above-mentioned magnitude of current and detected above-mentioned rotating speed and is estimated the pressure of ejection side and the estimated pressure that obtains,
Above-mentioned controlling component controls above-mentioned brushless motor, makes the estimated pressure obtained equal above-mentioned goal pressure.
2. a pump unit, it possess without sensor brushless motor and control the controlling component of above-mentioned brushless motor, wherein,
The ejection side of said pump unit is provided with pressure detecting part,
Above-mentioned controlling component controls above-mentioned brushless motor, makes the pressure that detected by above-mentioned pressure detecting part and detected pressures equal goal pressure;
Above-mentioned controlling component can also detect the rotating speed of magnitude of current and the above-mentioned brushless motor being supplied to above-mentioned brushless motor,
Above-mentioned controlling component is obtained according to detected above-mentioned magnitude of current and detected above-mentioned rotating speed and is estimated the pressure of ejection side and the estimated pressure obtained,
According to above-mentioned detected pressures and above-mentioned estimated pressure, above-mentioned controlling component judges that whether above-mentioned pressure detecting part is abnormal.
3. pump unit according to claim 2, is characterized in that,
According to the deviation between above-mentioned goal pressure and above-mentioned detected pressures and the deviation between above-mentioned detected pressures and above-mentioned estimated pressure, above-mentioned controlling component judges that whether above-mentioned pressure detecting part is abnormal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010281462A JP5461380B2 (en) | 2010-12-17 | 2010-12-17 | Pumping unit |
| JP2010-281462 | 2010-12-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102536772A CN102536772A (en) | 2012-07-04 |
| CN102536772B true CN102536772B (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110425522.2A Expired - Fee Related CN102536772B (en) | 2010-12-17 | 2011-12-15 | Pump units |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20120156056A1 (en) |
| JP (1) | JP5461380B2 (en) |
| CN (1) | CN102536772B (en) |
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| GB2501289A (en) * | 2012-04-18 | 2013-10-23 | Eaton Aerospace Ltd | Aircraft fuel supply system |
| JP6223024B2 (en) | 2013-07-10 | 2017-11-01 | 日野自動車株式会社 | Closed sticking detection device for fuel shut-off valve |
| JP5931844B2 (en) * | 2013-12-27 | 2016-06-08 | 三菱重工業株式会社 | Diagnosis system and diagnosis method for hydraulic machine, hydraulic transmission and wind power generator |
| JP6233162B2 (en) * | 2014-04-11 | 2017-11-22 | 株式会社デンソー | Control device for exhaust purification system |
| JP6333621B2 (en) * | 2014-05-15 | 2018-05-30 | 愛三工業株式会社 | Fuel supply device for internal combustion engine |
| JP2016084719A (en) * | 2014-10-23 | 2016-05-19 | 東京エレクトロン株式会社 | Liquid feeding method, liquid feeding system, and computer readable recording medium |
| DE102014226972A1 (en) | 2014-12-23 | 2016-06-23 | Continental Automotive Gmbh | Conveyor for conveying a medium and limiting a system pressure |
| RU2712858C2 (en) * | 2015-04-01 | 2020-01-31 | Конинклейке Филипс Н.В. | Pump unit for breast pump |
| CN109386416B (en) * | 2017-08-02 | 2021-01-22 | 纬湃汽车电子(芜湖)有限公司 | Dry run diagnostic system and method for fuel pump |
| JP6992335B2 (en) * | 2017-09-07 | 2022-01-13 | 株式会社島津製作所 | Vacuum pump start control device |
| JP7014636B2 (en) * | 2018-02-26 | 2022-02-01 | 株式会社荏原製作所 | Vacuum pump system and how to control the vacuum pump system |
| JP7067505B2 (en) * | 2019-02-15 | 2022-05-16 | トヨタ自動車株式会社 | Fuel pump diagnostic device |
| JP6750058B1 (en) * | 2019-03-06 | 2020-09-02 | 株式会社川本製作所 | Water supply |
| JP7476665B2 (en) | 2020-05-22 | 2024-05-01 | トヨタ自動車株式会社 | Fuel supply system control device |
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| JP2004108296A (en) * | 2002-09-19 | 2004-04-08 | Keihin Corp | Fluid pump system |
| JP2004162529A (en) * | 2002-09-19 | 2004-06-10 | Keihin Corp | Liquid pump system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5461380B2 (en) | 2014-04-02 |
| US20120156056A1 (en) | 2012-06-21 |
| JP2012127316A (en) | 2012-07-05 |
| CN102536772A (en) | 2012-07-04 |
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