CN102691585A - Motor control apparatus - Google Patents
Motor control apparatus Download PDFInfo
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- CN102691585A CN102691585A CN2012100807261A CN201210080726A CN102691585A CN 102691585 A CN102691585 A CN 102691585A CN 2012100807261 A CN2012100807261 A CN 2012100807261A CN 201210080726 A CN201210080726 A CN 201210080726A CN 102691585 A CN102691585 A CN 102691585A
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- fuel injection
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Abstract
The invention provides a motor control apparatus, which can not only reduce the data capacity required by high correction of fuel injection without pressure sensors such as an air pressure sensor or an air inlet sensor but also achieves good start performance, and unnecessary fuel injection is inhibated. Air density correction MAS and primary value TIS of the fuel injection amount at the start time are considered by a primary injection amount calculation part (108a), as the injection fuel amount much less than the base fuel injection amount corresponding to the motor temperature, a fuel addition control portion (108b) increases the air density correction MAS, the fuel injection amount TIS at the start time of the motor (1) is increased, after explosion injection amount calculation portion (108c) is completely calculates the fuel injection amount (TI) after complete explosion of the motor (1) by increase the air density index MAS by the fuel addition control portion 108b after the motor (1) is completely exploded.
Description
Technical field
The present invention relates to engine controlling unit, relate in particular to the engine controlling unit of the fuel injection amount of the motor of controlling moving bodys such as vehicle.
Background technique
In recent years; In moving bodys such as vehicle; Control fuel feed for fear of the complicated of mechanical structure and with the high form of the degrees of freedom corresponding to motor with the operation of throttle operation parts; And adopting the engine controlling unit possess fuel injection control mechanism, this fuel injection control mechanism controls fuel feed to motor on one side from the oil sprayer burner oil with the electronics mode on one side.
In addition, in such motor, when moving bodys such as vehicle are positioned at the highland, reduce, suck the situation that air quantity reduces according to barometric pressure, the fuel quantity in the mixed gas is superfluous relatively, mixed gas need not be changed to denseer state.Like this need not ground when becoming denseer state when mixed gas, changing appears in the cornering ability of not only such vehicle etc., and chemical substance composition that also might waste gas is than unnecessary variation also occurring, and consumes fuel unnecessary.
Therefore; Proposition has following engine controlling unit structure: even under the situation that the height according to moving bodys such as vehicles reduces barometric pressure and the suction air quantity reduces; Same air fuel ratio when easy structure also capable of using realizes being positioned at the lowland with such vehicle etc.; And need not set up and detect atmospheric pressure transducer, existing pressure transducer capable of using is obtained actual height and barometric pressure, and provides and actual height and the corresponding fuel injection amount of barometric pressure.
Under such situation; About electronic control fuel injection device; Patent documentation 1 discloses following structure: the quality air quantity sensor that possesses the suction air quantity of engine speed detecting sensor, throttle valve sensor and detection of engine; Engine parameter through more last time and current engine parameter do not use atmosphere pressure sensor just can detect height.
In addition; Fuel control unit about motor; Patent documentation 2 discloses following structure: possess the pressure transducer that comes the air-distributor pressure of detection of engine with absolute value, with the detected pressures of such pressure transducer as the barometric pressure before the engine rotation.
[patent documentation 1] Japan Patent the 02936749th communique
The special fair 07-037773 communique of [patent documentation 2] Japan
But, according to the inventor's research, in patent documentation 1 disclosed structure; The quality air quantity sensor of the suction air quantity of detection of engine itself need be set, so structure is more miscellaneous, and; For the comparison engine parameter, also need prepare various mapping (enum) datas in advance, for the The whole control device; The data volume that should prepare significantly increases, and it is miscellaneous that structure becomes, and demonstrates the tendency that is difficult to realize cost degradation consumingly.
In addition, according to patent documentation 2 disclosed structures, need the pressure transducer itself that comes the air-distributor pressure of detection of engine with absolute value is set, so structure is miscellaneous and demonstrate the tendency that is difficult to realize cost degradation consumingly.
Promptly; Present residing present situation is that expectation provides the engine controlling unit that is described below: the highland that can either cut down fuel injection amount is revised required data capacity and is not adopted various pressure transducers; Can realize good startability again, and the fuel that can suppress unnecessary fuel quantity sprays.
Summary of the invention
The present invention makes according to above research; Its purpose is to provide the engine controlling unit that is described below: the highland that can either cut down fuel injection amount is revised required data capacity and is not adopted atmosphere pressure sensor or air inlet pressure sensor equal pressure sensor; Can realize good startability again, and the fuel that can suppress unnecessary fuel quantity sprays.
In order to reach the above object; The technological scheme of first aspect of the present invention is a kind of engine controlling unit; It possesses: the initial injection quantity calculating part; The 1st air density correction factor of the revised regulation in highland is carried out in its consideration, and the original fuel injection amount when calculation engine starts is as than the original fuel injection amount of lacking with the corresponding basic fuel injection amount of above-mentioned engine temperature; Fuel increases control device, and it increases above-mentioned original fuel injection amount through increasing above-mentioned the 1st air density correction factor successively successively; And intact quick-fried back emitted dose calculating part; With above-mentioned engine start after after the rotating speed of above-mentioned motor become the corresponding above-mentioned motor of situation more than the quick-fried reference value intact quick-fried; Consideration increases the air density correction factor that control device increases successively by above-mentioned fuel, calculates the fuel injection amount behind above-mentioned motor intact quick-fried.
In addition; The present invention also provides the technological scheme of following the 2nd aspect except the technological scheme of the 1st aspect: this engine controlling unit also possesses air density correction factor calculating part; It is after above-mentioned motor is intact quick-fried; Consideration increases the air density correction factor that control device increases successively by above-mentioned fuel; Calculate the 2nd air density correction factor, above-mentioned intact quick-fried back emitted dose calculating part is considered above-mentioned the 2nd air density correction factor, calculates the fuel injection amount of above-mentioned motor after intact quick-fried.
In addition; The present invention also provides the technological scheme of following the 3rd aspect except the technological scheme of the 2nd aspect: above-mentioned air density correction factor calculating part be installed on that lambda sensor on the above-mentioned engine's exhaust system activates and with from the convergence of the corresponding lambda sensor feedback modifiers of the output value of above-mentioned lambda sensor coefficient before, will be set at above-mentioned the 2nd air density correction factor by the air density correction factor that above-mentioned fuel increases control device and increases successively.
In addition; The present invention also provides the technological scheme of following the 4th aspect except the technological scheme of the 3rd aspect: above-mentioned air density correction factor calculating part above-mentioned lambda sensor activate and the convergence of above-mentioned lambda sensor feedback modifiers coefficient after; When the deviation of above-mentioned lambda sensor feedback modifiers coefficient becomes specified value when above, further consider that above-mentioned lambda sensor feedback modifiers coefficient calculates above-mentioned the 2nd air density correction factor.
The engine controlling unit of the technological scheme of the 1st aspect according to the present invention; Possess: the initial injection quantity calculating part; Revised regulation the 1st air density correction factor in highland is carried out in its consideration; Original fuel injection amount when calculation engine starts is as than the original fuel injection amount of lacking with the corresponding basic fuel injection amount of the temperature of motor; Fuel increases control device, and it increases the original fuel injection amount through increasing by the 1st air density correction factor successively successively; And intact quick-fried back emitted dose calculating part; Its with the rotating speed of engine start rear engine be the corresponding motor of situation more than the quick-fried reference value intact quick-fried after; Consideration increases the air density correction factor that control device increases successively by fuel; Fuel injection amount after coming calculation engine intact quick-fried; Can either cut down the highland of fuel injection amount thus and revise required data capacity and do not adopt atmosphere pressure sensor and air inlet pressure sensor equal pressure sensor, can realize good startability again, and the fuel that can suppress unnecessary fuel quantity sprays.
In addition; The engine controlling unit of the technological scheme of the 2nd aspect according to the present invention; Also possesses air density correction factor calculating part; Its motor intact quick-fried after, consider to calculate the 2nd air density correction factor by the air density correction factor that fuel increases control device and increases successively, intact quick-fried back emitted dose calculating part is considered the fuel injection amount after the 2nd air density correction factor comes calculation engine intact quick-fried; Can realize good startability thus, and can suppress motor more reliably and spray at the fuel of intact unnecessary fuel quantity after quick-fried.
In addition; The engine controlling unit of the technological scheme of the 3rd aspect according to the present invention; Air density correction factor calculating part be installed on that lambda sensor on the engine's exhaust system activates and with from the convergence of the corresponding lambda sensor feedback modifiers of the output value of lambda sensor coefficient before; To be set at the 2nd air density correction factor by the air density correction factor that fuel increases control device and increases successively; Can realize good startability thus, and the fuel that can suppress the intact unnecessary fuel quantity after quick-fried of motor according to the working state of lambda sensor sprays.
In addition; The engine controlling unit of the technological scheme of the 4th aspect according to the present invention; Air density correction factor calculating part is after lambda sensor activation and the convergence of lambda sensor feedback modifiers coefficient; When the deviation of lambda sensor feedback modifiers coefficient is that specified value is when above; Further consider that lambda sensor feedback modifiers coefficient calculates the 2nd air density correction factor, can realize good startability thus, and can spray according to the fuel that the working state of lambda sensor suppresses more reliably the unnecessary fuel quantity behind motor intact quick-fried.
Description of drawings
Fig. 1 is the schematic representation of structure that the engine controlling unit in the embodiment of the present invention is shown and uses the motor of this engine controlling unit.
Fig. 2 is the flow chart that the control processing of the engine controlling unit in this mode of execution is shown.Specifically, (a) be the flow chart that the overall flow of this engine control processing is shown, the flow chart of fuel injection amount computing flow process when (b) being the startup that illustrates in the engine control processing shown in (a).
Fig. 3 is the flow chart that the intact quick-fried afterwards air density correction factor computing flow process of the engine control shown in (a) of Fig. 2 in handling is shown.
Fig. 4 is the sequential chart that is used for explaining the concrete example that the engine control of this mode of execution is handled; (a) being the sequential chart that air density correction factor MAS, MA and lambda sensor feedback modifiers coefficient MG, MGR are shown, (b) is the sequential chart that engine speed NE and fuel injection amount TIS, TI are shown.
Symbol description
1 ... Motor
2 ... Cylinder block
3 ... Cooling-water temperature sensor
4 ... Piston
5 ... Connecting rod
6 ... Bent axle
7 ... CKP
8 ... Cylinder head
9 ... The firing chamber
10 ... Spark plug
11 ... Inlet air pathway
12 ... Suction valve
13 ... Oil sprayer
14 ... Throttle valve
15 ... Throttle valve opening sensor
16 ... Exhaust passageway
17 ... Outlet valve
18 ... Catalyst changer
19 ... Lambda sensor
100 ... Engine controlling unit
101 ... The corner signal detection unit
102 ... The throttle valve opening detection unit
103 ... Lambda sensor output detection unit
104 ... The engine temperature detection unit
105 ... Storage
105a…ROM
105b…RAM
105c…EEPROM
106 ... The engine speed calculating part
107 ... Air density correction factor calculating part
108 ... The fuel injection amount control device
108a ... The initial injection quantity calculating part
108b ... Fuel increases control device
108c ... Intact quick-fried back emitted dose calculating part
109 ... The ignition timing control device
Embodiment
Below, suitably specify the engine controlling unit in the embodiment of the present invention with reference to accompanying drawing.
[structure of motor]
At first, specify the engine structure of having used the engine controlling unit in the embodiment of the present invention with reference to Fig. 1.
Fig. 1 is the schematic representation of structure that the engine controlling unit in this mode of execution is shown and has used the motor of this engine controlling unit.
As shown in Figure 1, motor 1 is the internal-combustion engines such as petrol engine that are equipped in the moving bodys such as omitting illustrated vehicle, typically, comprises the cylinder block 2 with a plurality of cylinders.In addition, for the ease of explanation, 1 cylinder only is shown in the drawings.
The cooling water that is used for cooled engine 1 circulates in the sidewall of cylinder block 2, forms to omit illustrated cooling water path.In such cooling water path, be provided with cooling-water temperature sensor 3.The temperature that cooling-water temperature sensor 3 detects the cooling water that flows through cooling water path is the temperature of motor 1, and exports this checkout value to engine controlling unit 100 as voltage signal.In addition, be under the situation of air-cooling type at motor 1, the temperature transducer that the temperature that is fit to detection of engine 1 can be set replaces cooling-water temperature sensor 3.
Internal configurations in cylinder block 2 has piston 4.Piston 4 is connected with bent axle 6 via connecting rod 5.Near this bent axle 6, be provided with CKP 7.CKP 7 detects the angle of swing of bent axle 6, and exports this checkout value to engine controlling unit 100 as voltage signal.
On the top of cylinder block 2 cylinder head 8 is installed.Space between piston 4 and the cylinder head 8 constitutes firing chamber 9.
In cylinder head 8, be provided with the spark plug 10 that the mixed gas in the firing chamber 9 is lighted a fire.The energising of omitting illustrated spark coil is controlled the igniting action of this spark plug 10 through engine controlling unit 100 controls.
In addition, the inlet air pathway 11 that is communicated with firing chamber 9 is installed on cylinder head 8.Firing chamber 9 is provided with suction valve 12 with the joint of inlet air pathway 11.Inlet air pathway 11 is provided with the oil sprayer 13 to its internal spray fuel.In addition, in inlet air pathway 11, be provided with throttle valve 14 at the upstream side of oil sprayer 13.Near throttle valve 14, be provided with throttle valve opening sensor 15.Throttle valve opening sensor 15 detects the aperture of throttle valve 14 and exports this checkout value to engine controlling unit 100 as voltage signal.In addition, also oil sprayer 13 can be set on cylinder head 8, feasible directly burner oil in firing chamber 9.
In addition, the exhaust passageway 16 that is communicated with firing chamber 9 is installed on cylinder head 8.9 are provided with outlet valve 17 with the joint of exhaust passageway 16 in the firing chamber.Exhaust passageway 16 is provided with the catalyst changer 18 of the waste gas that is used for purifying engine 1.The provided upstream of the catalyst changer 18 in exhaust passageway 16 is equipped with lambda sensor 19.Oxygen concentration in the waste gas of lambda sensor 19 detection of engine 1, and export this checkout value to engine controlling unit 100 as voltage signal.
[structure of engine controlling unit]
Then, illustrate in greater detail the structure of the engine controlling unit in the embodiment of the present invention with reference to Fig. 1.
As shown in Figure 1; Engine controlling unit 100 typically constitutes the electric control device (ECU:Electric Control Unit) that possesses microcomputer and carry out calculation process; And electric power is provided by the illustrated battery of the omission of on moving bodys such as vehicle, equipping, carry out work.This engine controlling unit 100 possesses: corner signal detection unit 101, throttle valve opening detection unit 102, lambda sensor output detection unit 103, engine temperature detection unit 104, storage 105, engine speed calculating part 106, air density correction factor calculating part 107, fuel injection amount control device 108 and ignition timing control device 109.In addition, such corner signal detection unit 101, throttle valve opening detection unit 102, lambda sensor output detection unit 103, engine temperature detection unit 104, engine speed calculating part 106, air density correction factor calculating part 107, fuel injection amount control device 108 and ignition timing control device 109 are illustrated respectively as the function module of calculation process.In addition, air density correction factor calculating part 107 also can be set to the function module of the inside of fuel injection amount control device 108.
Specifically, corner signal detection unit 101 reads in from the voltage signal of CKP 7 output, detects the angle of swing of bent axle 6 according to this voltage signal, and exports this checkout value to engine speed calculating part 106.The voltage signal that throttle valve opening detection unit 102 bases are exported from throttle valve opening sensor 15 detects the aperture of throttle valve 14, and exports this checkout value to fuel injection amount control device 108.
Lambda sensor output detection unit 103 reads in from the voltage signal of lambda sensor 19 outputs; Detect lambda sensor output voltage V G according to this voltage signal; And carry out the calculating of activation judgement, the lambda sensor feedback modifiers coefficient MG of lambda sensor 19, the convergence judgement of lambda sensor feedback modifiers coefficient MG and the deviation of lambda sensor feedback modifiers coefficient MG according to this lambda sensor output voltage V G respectively and judge, export their calculated value and judged result to air density correction factor calculating part 107.In addition; Lambda sensor output detection unit 103 can only possess and reads in the function that detects lambda sensor output voltage V G from the voltage signal of lambda sensor 19 outputs; In the case, as long as the calculating arbitration functions module that is provided with in addition that the deviation of convergence judgement and lambda sensor feedback modifiers coefficient MG of calculating, the lambda sensor feedback modifiers coefficient MG of the activation judgement of carrying out lambda sensor 19 respectively, lambda sensor feedback modifiers coefficient MG is judged and exports their calculated value and judged result to air density correction factor calculating part 107.
Engine temperature detection unit 104 reads in from the voltage signal of cooling-water temperature sensor 3 output, comes the temperature of detection of engine 1 according to this voltage signal, and exports this checkout value to fuel injection amount control device 108.
Engine speed calculating part 106 is according to the rotating speed of calculating motor 1 from the checkout value of the angle of swing of the bent axle 6 of corner signal detection unit 101 outputs, and exports this calculated value to fuel injection amount control device 108 and ignition timing control device 109 respectively.
Air density correction factor calculating part 107 be used to from the such various output values of the calculated value of lambda sensor output detection unit 103 and judged result be stored in the various data in the storage 105; Mainly calculate motor 1 at the intact promptly intact quick-fried back air density correction factor MA (the 2nd air density correction factor) of air density correction factor after quick-fried, and export this calculated value to fuel injection amount control device 108 and ignition timing control device 109 respectively.
Fuel injection amount control device 108 possesses initial injection quantity calculating part 108a, fuel increases control device 108b and finishes the function module that quick-fried back emitted dose calculating part 108c is used as this calculation process; Start, arrived quick-fried state and keep the process that this finishes quick-fried state through motor 1, control the fuel injection amount of oil sprayer 13.In addition; Start, arrived in the quick-fried process at motor 1; Performance function when initial injection quantity calculating part 108a and fuel increase control device 108b fuel injection amount TIS is from oil sprayer 13 ejection fuel at the initial value TISI of fuel injection amount control device 108 fuel injection amount when starting and when starting; After motor 1 intact quick-fried, the fuel injection amount TI of intact quick-fried back emitted dose calculating part 108c after fuel injection amount control device 108 is intact quick-fried according to motor be the performance function during from oil sprayer 13 ejection fuel.
Ignition timing control device 109 to omitting the "on" position of illustrated spark coil, is controlled the igniting action of spark plug 10 through control.
[engine control processing]
Fig. 2 (a) is the flow chart that the overall flow of the engine control processing in this mode of execution is shown.
Engine control shown in Fig. 2 (a) is handled in the ignition switch of moving bodys such as vehicle and is switched to moment of on state from off state, and the processing that enters into step S1 is handled in engine control.In addition, beginning to carry out this engine control repeatedly to each rotation of motor 1 handles.In addition, can realize this engine control processing through the control program that engine controlling unit 100 is read and carried out in the ROM105a that is stored in storage 105.
In the processing of step S1; Engine speed calculating part 106 is calculated the rotational speed N E of motor 1 according to the checkout value of the angle of swing of the expression bent axle of exporting from corner signal detection unit 101 6; Export the electrical signal of this engine speed NE that calculates of expression to fuel injection amount control device 108 and ignition timing control device 109 respectively; Wherein, this corner signal detection unit 101 is transfused to the voltage signal from CKP 7.Thus, the processing of step S1 finishes, and the processing that enters into step S2 is handled in engine control.
In the processing of step S2; The voltage signal that throttle valve opening detection unit 102 bases are exported from throttle valve opening sensor 15 detects the aperture TH of throttle valve 14, and the electrical signal of the aperture TH of the throttle valve 14 that expression is detected exports fuel injection amount control device 108 to.Thus, the processing of step S2 finishes, and the processing that enters into step S3 is handled in engine control.
In the processing of step S3, engine temperature detection unit 104 comes the temperature T W of detection of engine 1 according to the voltage signal from cooling-water temperature sensor 3 outputs, and will represent that the electrical signal of the temperature T W of detected motor 1 exports fuel injection amount control device 108 to.Thus, the processing of step S3 finishes, and the processing that enters into step S4 is handled in engine control.
In the processing of step S4, fuel injection amount control device 108 differentiates whether the engine speed NE that calculates through the processing of step S1 is more than the reference rotation speed (intact quick-fried reference value) of regulation.Here, the value of the big established amount of rotating speed when this reference rotation speed is redefined for ratio engine 1 startup, and store in the ROM105a, this value that is stored among the ROM105a is read and used to fuel injection amount control device 108.When to differentiate the result be engine speed NE less than the reference rotation speed of regulation, it is intact not quick-fried that fuel injection amount control device 108 is judged as motor 1, and the processing that enters into step S5 is handled in engine control.On the other hand, be the reference rotation speed of regulation when above in that to differentiate the result be engine speed NE, it is intact quick-fried that fuel injection amount control device 108 is judged as motor 1, and the processing that enters into step S6 is handled in engine control.
In the processing of step S5; Fuel injection amount control device 108 is carried out fuel injection amount computing when starting; When this starts in the fuel injection amount computing, when calculating engine start, specifically from motor 1 starting begin till intact quick-fried during fuel injection amount.Fuel injection amount computing when in the back, being described in detail this startup with reference to the flow chart shown in Fig. 2 (b).Thus, the processing of step S5 finishes, and a series of engine control processing finishes.
On the other hand, in the processing of step S6, lambda sensor output detection unit 103 receives from the voltage signal of lambda sensor 19 outputs, detects lambda sensor output voltage V G according to this voltage signal.Thus, the processing of step S6 finishes, and the processing that enters into step S7 is handled in engine control.
In the processing of step S7; The value of the lambda sensor output voltage V G that lambda sensor output detection unit 103 goes out according to the processing and detecting through step S6; Differentiate the lambda sensor output voltage V G of the oxygen concentration respective change in the waste gas that whether detects with motor 1, differentiate lambda sensor 19 thus and whether activate.Differentiating the result is when not detecting this lambda sensor output voltage V G, and lambda sensor output detection unit 103 is judged as lambda sensor 19 and does not activate, and the processing that enters into step S9 is handled in engine control.On the other hand, be when detecting this lambda sensor output voltage V G differentiating the result, lambda sensor output detection unit 103 is judged as lambda sensor 19 and has activated, and the processing that enters into step S8 is handled in engine control.
In the processing of step S8; Lambda sensor output detection unit 103 is to reduce lambda sensor feedback modifiers coefficient MG more than the specified value when (for example more than 0.45 volt) at for example lambda sensor output voltage V G; Increase lambda sensor feedback modifiers coefficient MG during less than specified value (for example less than 0.45 volt) at lambda sensor output voltage V G; Thus with the waste gas of motor 1 in oxygen concentration calculate lambda sensor feedback modifiers coefficient MG accordingly; Make the air fuel ratio of motor 1 reach chemically correct fuel, and the electrical signal of the lambda sensor feedback modifiers coefficient MG that will represent to be calculated export air density correction factor calculating part 107 to.Thus, the processing of step S8 finishes, and the processing that enters into step S9 is handled in engine control.
In the processing of step S9; Air density correction factor calculating part 107 executes the air density correction factor computing of quick-fried back; In this intact quick-fried back air density correction factor computing, calculate the air density correction factor promptly intact quick-fried back air density correction factor MA (2nd air density correction factor) of motor 1 after intact quick-fried.In the back, come at length to narrate this intact quick-fried back air density correction factor computing with reference to flow chart shown in Figure 3.Thus, the processing of step S9 finishes, and the processing that enters into step S10 is handled in engine control.
In the processing of step S10; Intact quick-fried back emitted dose calculating part 108c reads the mapping (enum) data of the basic fuel injection amount corresponding with engine speed NE and throttle valve opening TH from ROM105a, and calculates engine speed NE and the corresponding basic fuel injection amount of throttle valve opening TH with the processing acquisition of passing through step S1 and step S2 according to this mapping (enum) data.Then; Intact quick-fried back emitted dose calculating part 108c multiplies each other through the basic fuel injection amount that will calculate like this and the intact quick-fried back air density correction factor MA that in the processing of step S9, is calculated by air density correction factor calculating part 107, calculate the fuel injection amount of motor 1 after intact quick-fried promptly intact quick-fried after fuel injection amount TI.Then, the intact quick-fried back fuel injection amount TI that fuel injection amount control device 108 is calculated according to intact quick-fried back emitted dose calculating part 108c controls the fuel injection amount of oil sprayer 13, implements to spray from the intact quick-fried back fuel of oil sprayer 13 ejection fuel.Thus, the processing of step S10 finishes, and a series of engine control processing finishes.In addition; Control parameters of engine as the mapping (enum) data of this basic fuel injection amount; Can enumerate the parameter that engine speed NE and throttle valve opening TH are used as realizing easy and reliable control; But be not limited to this, can suitably select to adopt other control parameters of engine as required with accepting or rejecting.
[fuel injection amount computing during startup]
The action of the engine controlling unit 100 when then, specifying fuel injection amount computing when carrying out the startup of this engine control in handling with reference to the flow chart shown in Fig. 2 (b).
The flow chart of fuel injection amount computing flow process when Fig. 2 (b) is the startup that illustrates in the engine control processing shown in Fig. 2 (a).
The fuel injection amount computing is in the processing of the step S4 shown in Fig. 2 (a), to be judged as the intact quick-fried moment of motor 1 to begin during startup shown in Fig. 2 (b), and the fuel injection amount computing enters into the processing of step S21 during startup.
In the processing of step S21, fuel injection amount control device 108 reads out in the value of middle initial value calculating the finishing signs of storing such as RAM105b, and differentiates whether this value is 1, and whether the initial value TISI of fuel injection amount calculates when differentiating startup thus.Differentiating the result is that the value that initial value calculates the sign that finishes is 1 o'clock, and the initial value TISI that fuel injection amount control device 108 is judged as fuel injection amount when starting calculates, and the fuel injection amount computing enters into the processing of step S24 during startup.On the other hand; Differentiating the result is that the value that initial value calculates the sign that finishes is 0 o'clock; The initial value TISI that fuel injection amount control device 108 is judged as fuel injection amount when starting does not have calculating to finish, and the fuel injection amount computing enters into the processing of step S22 during startup.
In the processing of step S22; Initial injection quantity calculating part 108a reads the mapping (enum) data of the basic fuel injection amount corresponding with engine temperature TW from ROM105a; Calculate the corresponding basic fuel injection amount of engine temperature TW that obtains with the processing that utilizes step S3 according to this mapping (enum) data; And read the value of carrying out highland revised air density correction factor MAS (the 1st air density correction correction factor) from ROM105a; The value that the basic fuel injection amount that will calculate then and this carry out highland revised air density correction factor MAS multiplies each other, and calculates the initial value TISI of fuel injection amount when starting thus.And the value of initial injection quantity calculating part 108a initial value TISI of fuel injection amount during with this startup that calculates stores in RAM105b etc.Handle according to this, the original fuel injection amount when only motor 1 being started is set at than the fuel injection amount that lacks with the corresponding basic fuel injection amount of engine temperature TW.In addition; Control parameters of engine as the mapping (enum) data of this basic fuel injection amount; Can enumerate the parameter that engine temperature TW is used as realizing easy and reliable control, but be not limited to this, can also suitably select to adopt other control parameters of engine as required with accepting or rejecting.
Here; To carry out highland revised air density correction factor MAS with the reason that basic fuel injection amount multiplies each other is; Consider that moving bodys such as vehicle are positioned at eminence and the situation of ato unit 1; Original fuel injection amount during with ato unit 1; Be positioned at low being located in and original fuel injection amount when making the intact quick-fried engine start of motor 1 during ato unit 1, the value lacked than the basic fuel injection amount corresponding as moving bodys such as being adapted at vehicle, thus, in fact can obtain reliably the most suitablely when eminence ato unit 1 to finish quick-fried fuel injection amount with engine temperature TW.In other words; If set the original fuel injection amount when the engine start of eminence too much; Though then motor 1 is intact quick-fried easily; But mixed gas need not continue to maintain denseer state, thereby can't obtain the optimal fuel injection amount of eminence, so adopt the structure of having tackled in order not produce such situation.Thus, the processing of step S22 finishes, and the fuel injection amount computing enters into the processing of step S23 during startup.In addition specifically; Here think that the highland is about absolute altitude 2000m; As carrying out highland revised air density correction factor MAS; The value of the original fuel injection when employing makes the intact quick-fried required engine start of motor 1 in the time of can being provided at the position ato unit 1 that is equivalent to absolute altitude 2000m in the case, should value for example be set at 0.8.
In the processing of step S23, the value that fuel injection amount control device 108 calculates the sign that finishes with initial value is set at 1 and store in the RAM105b etc., and this initial value calculates the sign expression that finishes and calculated the situation of the initial value TISI of fuel injection amount when starting.Thus, the processing of step S23 finishes, and the fuel injection amount computing enters into the processing of step S28 during startup.
On the other hand; In the processing of step S24; Fuel injection amount control device 108 is read the value of carrying out highland revised air density correction factor MAS from ROM105a; Perhaps the processing of utilization step S26 last time reads out in the value of the middle already added air density correction factor MAS that store such as RAM105b, differentiates whether the value of being read is more than the specified value.Differentiating the result is that the value of being read is specified value when above, and the fuel injection amount computing enters into the processing of step S25 during startup.On the other hand, be the value of being read during differentiating the result less than specified value, the fuel injection amount computing enters into the processing of step S26 during startup.Here, the specified value of being differentiated is set at 1, this value 1 is that mixed gas can need not ground not become the value of the air density correction factor MAS of denseer state because of need not ground increasing fuel injection amount when starting the process when intact quick-fried when motor 1 starts.
In the processing of step S25, the value that fuel injection amount control device 108 will carry out highland revised air density correction factor MAS is set at 1, and the value of carrying out highland revised air density correction factor MAS that will set stores in RAM105b etc.Through utilizing this processing that the value of air density correction factor MAS is set at 1, be suppressed at when motor 1 starts the situation that mixed gas the process when intact quick-fried need not ground becomes denseer state.Thus, the processing of step S25 finishes, and the fuel injection amount computing enters into the processing of step S27 during startup.
In the processing of step S26; Fuel increases control device 108b and from ROM105a, reads the value of carrying out highland revised air density correction factor MAS; Perhaps the processing of utilization step S26 last time reads out in the value of the middle already added air density correction factor MAS that store such as RAM105b; And will be worth with less than 1 specified value addition; Thereby increase the value carry out highland revised air density correction factor MAS, and value that will this already added air density correction factor MAS stores in the RAM105b etc. into.Handle according to this, carrying out highland revised air density correction factor MAS increases specified value successively according to each rotation of motor 1 and upgrades.Thus, the processing of step S26 finishes, and the fuel injection amount computing enters into the processing of step S27 during startup.Here, the ratio 1 little specified value that is used for addition depends on from motor 1 and starts time of beginning till intact quick-fried etc. and consider increase to decide several times, as long as for example be set at the value than 1 fully little 0.03.
In the processing of step S27; Initial injection quantity calculating part 108a utilizes the processing of processing or the step S26 of step S25 to read out in the value of the already added air density correction factor MAS of storage among the RAM105b etc.; And the initial value TISI of fuel injection amount when the processing that utilizes step S22 reads out in the startup of storage among the RAM105b etc.; These values are multiplied each other; Fuel injection amount TIS when calculating the startup that the initial value TISI of fuel injection amount increases successively when starting thus, the value of fuel injection amount TIS stores in the RAM105b etc. during with the startup that calculated.Handle through this, fuel injection amount TIS increases successively and upgrades according to each rotation of motor 1 according to the air density correction factor MAS that in the processing of step S26, increases successively during startup.Thus, the processing of step S27 finishes, and the fuel injection amount computing enters into the processing of step S28 during startup.
In the processing of step S28; The initial value TISI of fuel injection amount when fuel injection amount control device 108 utilizes the processing of step S22 to read out in the startup of storage among the RAM105b etc.; The value of fuel injection amount TIS when perhaps utilizing the processing of step S27 to read out in the startup of storage among the RAM105b etc.; And being worth the fuel injection amount of controlling oil sprayer 13 according to this, fuel sprays when implementing the startup from oil sprayer 13 ejection fuel.Thus, the processing of step S28 finishes, and the fuel injection amount computing finishes during a series of startups, and end is in the lump handled also in a series of engine control shown in Fig. 2 (a).
[the air density correction factor computing of intact quick-fried back]
Then, with reference to flow chart shown in Figure 3, the action of the engine controlling unit 100 when specifying the intact quick-fried afterwards air density correction factor computing of the engine control shown in the execution graph 2 (a) in handling.
Fig. 3 is the flow chart that the flow process of the intact quick-fried back air density correction factor computing in the engine control processing shown in Fig. 2 (a) is shown.
Flow chart shown in Figure 3 is in the processing of the step S7 shown in Fig. 2 (a), to differentiate the moment that the processing of the moment that not have to activate for lambda sensor 19 or the step S8 shown in Fig. 2 (a) finished to begin, intact quick-fried after the computing of air density correction factor enter into the processing of step S31.
In the processing of step S31; Fuel injection amount control device 108 reads out in the value of middle intact quick-fried back air density correction factor calculating the finishing signs of storing such as RAM105b; And differentiate whether this value is 1, differentiate motor 1 air density correction factor MA (the 2nd air density correction factor) after intact quick-fried later air density correction factor is promptly intact quick-fried thus and whether calculate.The value of air density correction factor calculating finishing sign is 1 o'clock after the differentiation result has been quick-fried; Fuel injection amount control device 108 has been judged as quick-fried back air density correction factor MA and has calculated, and the air density correction factor computing of intact quick-fried back enters into the processing of step S34.On the other hand; The value of air density correction factor calculating finishing sign is 0 o'clock after the differentiation result has been quick-fried; Fuel injection amount control device 108 has been judged as quick-fried back air density correction factor MA does not have calculating to finish, and the air density correction factor computing of intact quick-fried back enters into the processing of step S32.
In the processing of step S32; Air density correction factor calculating part 107 is read the value that is stored in the already added air density correction factor MAS in RAM105b etc. in the processing of the step S26 shown in Fig. 2 (b); This value has been set at the value of quick-fried back air density correction factor MA, and this setting value has been stored in the RAM105b etc.Thus, the processing of step S32 finishes, and the air density correction factor computing of intact quick-fried back enters into the processing of step S33.
In the processing of step S33, fuel injection amount control device 108 will finish the value that quick-fried back air density correction factor calculates the sign that finishes and be set at 1, and this value is stored in the RAM105b etc.Thus, the processing of step S33 finishes, and the air density correction factor computing of intact quick-fried back enters into the processing of step S38.
On the other hand; In the processing of step S34; Lambda sensor output detection unit 103 is calculated the maximum of lambda sensor feedback modifiers coefficient MG, the moving average between the minimum peak; Whether and whether the variation of differentiating this moving average be in the predetermined range, differentiate lambda sensor feedback modifiers coefficient MG thus and restrain.Differentiating the result is that the variation of lambda sensor feedback modifiers coefficient MG is not in predetermined range the time; Lambda sensor output detection unit 103 is judged as not convergence of lambda sensor feedback modifiers coefficient MG; A series of intact quick-fried back air density correction factor computing finishes, and a series of engine control shown in Fig. 2 (a) are handled also and finished in the lump.On the other hand; Differentiating the result is that the variation of lambda sensor feedback modifiers coefficient MG is when being in the predetermined range; Lambda sensor output detection unit 103 is judged as lambda sensor feedback modifiers coefficient MG and restrains, and the air density correction factor computing of intact quick-fried back enters into the processing of step S35.In addition, consider that the kind of lambda sensor 19 and the resolution of lambda sensor output detection unit 103 wait suitable this predetermined range of setting, are its CLV ceiling limit value and lower limit, and store in advance in the ROM105a, read and use these values from ROM105a.
In the processing of step S35; Lambda sensor output detection unit 103 convergent lambda sensor feedback modifiers coefficient MG is set at convergence post oxygen sensor feedback modifiers coefficient MGR; Calculate the deviation between 1.0 times of the values that convergence post oxygen sensor feedback modifiers coefficient MGR and convergence post oxygen sensor feedback modifiers coefficient MGR when the value of intact quick-fried back air density correction factor MA is appropriate should get, and whether the deviate that differentiation is calculated is more than the specified value.Differentiating the result is deviate during less than specified value, and a series of intact quick-fried back air density correction factor computing finishes, and a series of engine control shown in Fig. 2 (a) is handled also and finished in the lump.On the other hand; Differentiating the result is that deviate is that specified value is when above; Lambda sensor output detection unit 103 will represent that the electrical signal of the value of convergence post oxygen sensor feedback modifiers coefficient MGR exports air density correction factor calculating part 107 to, and the air density correction factor computing of intact quick-fried back enters into the processing of step S36.Here; As long as will be set at following such value to the specified value that deviate compares; This value is need not ground to increase fuel injection amount and make mixed gas need not ground become the required sufficient value of state of the value of denseer state for the value of having corrected quick-fried back air density correction factor MA becomes; Here be set at 0.07 value, wherein, the value of said intact quick-fried back air density correction factor MA is in the processing of the processing of step S32 and step S36, to set.
In the processing of step S36; Air density correction factor calculating part 107 utilizes the processing of the processing of step S32 or step S36 last time to read out in the value of the middle intact quick-fried back air density correction factor MA that store such as RAM105b; The multiply each other value of back gained of the value of this value and the convergence post oxygen sensor feedback modifiers coefficient MGR that in the processing of step S35, exports has been set at the value of quick-fried back air density correction factor MA; Export the electrical signal of this setting value of expression to fuel injection amount control device 108, intact quick-fried back emitted dose calculating part 108c specifically, and this setting value is stored in the RAM105b etc.Handle according to this, with the value correction of intact quick-fried back air density correction factor MA and be updated to not have and make mixed gas need not ground become the value of the degree of denseer this situation of state, promptly be suitable for the value of the residing height of moving body such as current vehicle because of fuel injection amount need not ground increases.Thus, the processing of step S36 finishes, and the air density correction factor computing of intact quick-fried back enters into the processing of step S37.
In the processing of step S37, lambda sensor output detection unit 103 is reset to 1 with lambda sensor feedback modifiers coefficient MG that self kept and the value of convergence post oxygen sensor feedback modifiers coefficient MGR, prepares for handling next time.Thus, the processing of step S37 finishes, and the air density correction factor computing of intact quick-fried back enters into the processing of step S38.
In the processing of step S38, air density correction factor calculating part 107 is calculated the value of barometric pressure PA according to the value of the intact quick-fried MA of air density correction factor afterwards that in the processing of step S36, obtains, and calculated value is stored in the RAM105b etc.The value that is stored in the barometric pressure PA in the storage 105 is used in the demonstration and various control on the display unit that in moving bodys such as vehicle, is provided with.Thus, the processing of step S38 finishes, and a series of intact quick-fried back air density correction factor computing finishes.
[concrete example]
At last, specify the concrete example that above engine control is handled with reference to Fig. 4.
Fig. 4 is the sequential chart that is used for explaining the concrete example that the engine control of this mode of execution is handled; Fig. 4 (a) illustrates the sequential chart of air density correction factor MAS, MA and lambda sensor feedback modifiers coefficient MG, MGR, and Fig. 4 (b) illustrates the sequential chart of engine speed NE and fuel injection amount TIS, TI.In addition, in this concrete example,, and the aperture of the throttle valve 14 behind the engine start is fixed for the ease of explanation.
(1) moment T=T0
When moment T=T0 shown in Figure 4, when ignition switch switches on state when coming ato unit from off state, come to begin repeatedly engine control to each rotation of motor 1 and handle.Like this; Beginning the moment that engine control is handled; Initial injection quantity calculating part 108a will be corresponding with engine temperature TW basic fuel injection amount and carry out highland revised air density correction factor MAS (value in this concrete example is 0.8) accordingly with the highland that is equivalent to absolute altitude 2000m and multiply each other, calculate the initial value TISI of fuel injection amount when starting.Then, the initial value TISI of fuel injection amount controls the fuel injection amount of oil sprayer 13 during startup that fuel injection amount control device 108 is calculated according to initial injection quantity calculating part 108a, and fuel is begun from oil sprayer 13 ejections.
(2) T=T0～T1 during
Then; During among T=T0～T1; Fuel increase control device 108b increases the value of carrying out highland revised air density correction factor MAS successively to each rotation of motor 1; Initial injection quantity calculating part 108a through will this already added air density correction factor MAS when starting the initial value TISI of fuel injection amount multiply each other, come to increase successively and calculate fuel injection amount TIS when starting.Then, fuel injection amount TIS controls the fuel injection amount of oil sprayer 13 during startup that fuel injection amount control device 108 is calculated according to initial injection quantity calculating part 108a, makes fuel from oil sprayer 13 ejections.
(3) T=T1～T2 during
Then; When being judged as motor 1 at the moment T=T1 when intact quick-fried; The value (being 0.87 in this concrete example) that air density correction factor calculating part 107 will increase before the moment T=T1 successively when increasing the moment T=T1 of the air density correction factor MAS that finishes has been set at the value of quick-fried back air density correction factor MA, the basic fuel injection amount of intact quick-fried back emitted dose calculating part 108c through will be corresponding with engine speed NE and throttle valve opening TH with intact quick-fried after air density correction factor MA multiply each other calculated quick-fried after fuel injection amount TI.Then, the intact quick-fried back fuel injection amount TI that fuel injection amount control device 108 is calculated according to intact quick-fried back emitted dose calculating part 108c controls the fuel injection amount of oil sprayer 13, makes fuel from oil sprayer 13 ejections.In addition, the control of this fuel injection amount itself is maintained to T=T3 constantly through moment T=T2.
(4) T=T2～T3 during
Then; When at moment T=T2 when lambda sensor 19 begins to export the rotation correspondent voltage signal with motor 1; During till moment T=T3; Lambda sensor output detection unit 103 is calculated the maximum of lambda sensor feedback modifiers coefficient MG, the moving average between the minimum peak after the activation of judging lambda sensor 19, and whether the variation of differentiating this moving average is in the predetermined range; Whether differentiate lambda sensor feedback modifiers coefficient MG thus restrains; After lambda sensor feedback modifiers coefficient MG convergence, calculate the deviation delta x of 10 times of convergence post oxygen sensor feedback modifiers coefficient MGR and specified values, and differentiate whether the deviation delta x that is calculated is that specified value is more than 0.07.
(5) after the moment T=T3
Then; When be judged as deviation delta x at moment T=T3 is that specified value 0.07 is when above; The value of quick-fried back air density correction factor MA is set and be updated to air density correction factor calculating part 107 with the multiply each other value of back gained of the value of the value of current intact quick-fried back air density correction factor MA and convergence post oxygen sensor feedback modifiers coefficient MGR, intact quick-fried back emitted dose calculating part 108c through with basic fuel injection amount with upgrade like this after intact quick-fried after air density correction factor MA multiply each other calculated quick-fried after fuel injection amount TI.At this moment, the value with intact quick-fried back air density correction factor MA is modified to the value that is fit to the residing height of moving body such as current vehicle.Specifically; During among T=T2～T3; Because the value of intact quick-fried back air density correction factor MA be 0.87 and the value of convergence post oxygen sensor feedback modifiers coefficient MGR be 0.92; So can know: when they are multiplied each other, be about 0.8, moving bodys such as current vehicle are in the highland that is equivalent to absolute altitude 2000m, and can know that the value that will finish quick-fried back air density correction factor MA is modified to the value of the height that is fit to be equivalent to absolute altitude 2000m.And after moment T=T3, the intact quick-fried back fuel injection amount TI that fuel injection amount control device 108 is calculated according to intact quick-fried back emitted dose calculating part 108c controls the fuel injection amount of oil sprayer 13, makes fuel from oil sprayer 13 ejections.At this moment, engine speed NE is stable under the racing speed of regulation.
Can know by above explanation; In the engine control of this mode of execution is handled; Initial injection quantity calculating part 108a considers and carries out highland revised air density correction factor MAS; The initial value TISI of fuel injection amount is as than the fuel injection amount that lacks with the corresponding basic fuel injection amount of engine temperature TW during the startup of calculation engine 1; Fuel increases control device 108b through increasing air density correction factor MAS successively; Fuel injection amount TIS initial value TISI of fuel injection amount when starting increases successively when making the startup of motor 1; Intact quick-fried back emitted dose calculating part 108c is after motor 1 is intact quick-fried, and the air density correction factor MAS that considering to utilize fuel to increase control device 108b increases successively calculates the intact quick-fried back fuel injection amount TI of motor 1, so both can cut down the highland required data capacity of correction of fuel injection amount and not adopt atmosphere pressure sensor or air inlet pressure sensor equal pressure sensor; Can realize good startability again, and the fuel that can suppress unnecessary fuel quantity sprays.
In addition; In the engine control of this mode of execution is handled; Air density correction factor calculating part 107 is after motor 1 is intact quick-fried; The air density correction factor MAS that considering to utilize fuel to increase control device 108b increases has successively calculated quick-fried back air density correction factor MA; Intact quick-fried back emitted dose calculating part 108c considers that this intact quick-fried back air density correction factor MA calculates the intact quick-fried back fuel injection amount TI of motor 1, thus can realize good startability, and can suppress the fuel injection of the unnecessary fuel quantity of motor 1 after intact quick-fried more reliably.
In addition; In the engine control of this mode of execution is handled; Air density correction factor calculating part 107 the lambda sensor on the vent systems that is installed on motor 1 19 activate and with from the corresponding lambda sensor feedback modifiers of the output value of lambda sensor 19 coefficient MG convergence before; The air density correction factor MAS that utilizes fuel increase control device 108b to increase successively has been set at quick-fried back air density correction factor MA; So can realize good startability, and can suppress motor 1 according to the operating state of lambda sensor 19 and spray at the fuel of intact fuel quantity unnecessary after quick-fried.
In addition; In the engine control of this mode of execution is handled; Air density correction factor calculating part 107 is after lambda sensor 19 activation and lambda sensor feedback modifiers coefficient MG convergence; When the deviation of this convergence post oxygen sensor feedback modifiers coefficient MGR is that specified value is when above; Further consider that convergence post oxygen sensor feedback modifiers coefficient MGR has calculated quick-fried back air density correction factor MA, thus can realize good startability, and can come to suppress more reliably the fuel injection of the unnecessary fuel quantity of motor 1 after intact quick-fried according to the operating state of lambda sensor 19.
In addition; In the present invention, the kind of parts, configuration, number etc. are not limited to above-mentioned mode of execution, in the nature of things; In the scope that does not break away from purport of the present invention, can suitably change, can its structural element suitably be replaced into key element that can play the equivalent effect effect etc.
Utilizability in the industry
As discussed above; In the present invention; Such engine controlling unit can be provided: its highland that can cut down fuel injection amount is revised required data capacity and is not adopted atmosphere pressure sensor or air inlet pressure sensor equal pressure sensor; Can realize good startability again, and the fuel that can suppress unnecessary fuel quantity sprays.According to its general general characteristic, can wait in expectation can be widely used in the motor of moving bodys such as vehicle.
Claims (4)
1. an engine controlling unit is characterized in that, this engine controlling unit possesses:
The initial injection quantity calculating part; The 1st air density correction factor of the revised regulation in highland is carried out in its consideration; Original fuel injection amount when calculation engine starts is as than the original fuel injection amount of lacking with the corresponding basic fuel injection amount of the temperature of said motor;
Fuel increases control device, and it increases said original fuel injection amount through increasing said the 1st air density correction factor successively successively; And
Intact quick-fried back emitted dose calculating part; With said engine start after after the rotating speed of said motor become the corresponding said motor of situation more than the quick-fried reference value intact quick-fried; Be somebody's turn to do quick-fried back emitted dose calculating part and considered to increase the air density correction factor that control device increases successively, calculated the fuel injection amount behind said motor intact quick-fried by said fuel.
2. engine controlling unit according to claim 1 is characterized in that,
This engine controlling unit also possesses air density correction factor calculating part, and it is after said motor intact quick-fried, and considering increases the air density correction factor that control device increases successively by said fuel, calculates the 2nd air density correction factor,
Said intact quick-fried back emitted dose calculating part is considered said the 2nd air density correction factor, calculates the fuel injection amount behind said motor intact quick-fried.
3. engine controlling unit according to claim 2 is characterized in that,
Said air density correction factor calculating part be installed on that lambda sensor on the said engine's exhaust system activates and with from the convergence of the corresponding lambda sensor feedback modifiers of the output value of said lambda sensor coefficient before, will be set at said the 2nd air density correction factor by the air density correction factor that said fuel increases control device and increases successively.
4. engine controlling unit according to claim 3 is characterized in that,
Said air density correction factor calculating part is after said lambda sensor activation and the convergence of said lambda sensor feedback modifiers coefficient; When the deviation of said lambda sensor feedback modifiers coefficient is specified value when above, further consider that said lambda sensor feedback modifiers coefficient calculates said the 2nd air density correction factor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| JP2011065626A JP5616264B2 (en) | 2011-03-24 | 2011-03-24 | Engine control device |
| JP2011-065626 | 2011-03-24 |
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| CN102691585A true CN102691585A (en) | 2012-09-26 |
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| JP (1) | JP5616264B2 (en) |
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Cited By (2)
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| CN103206313B (en) * | 2013-04-25 | 2016-01-13 | 潍柴动力股份有限公司 | A kind of controlling method of Engine Injection Mass and system |
| CN105715391A (en) * | 2014-12-17 | 2016-06-29 | 福特环球技术公司 | Methods And Systems For Diagnosing An Intake Oxygen Sensor Based On Pressure |
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| TWI595152B (en) * | 2013-04-16 | 2017-08-11 | Denso Corp | Internal combustion engine can be estimated engine temperature control device |
| JP6393564B2 (en) * | 2014-09-11 | 2018-09-19 | 株式会社ケーヒン | Fuel injection control device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2012202255A (en) | 2012-10-22 |
| TWI489039B (en) | 2015-06-21 |
| CN102691585B (en) | 2015-06-10 |
| JP5616264B2 (en) | 2014-10-29 |
| TW201247999A (en) | 2012-12-01 |
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Effective date of registration: 20220110 Address after: Ibaraki Patentee after: Hitachi astemo Co.,Ltd. Address before: Tokyo, Japan Patentee before: KEIHIN Corp. |