CN104005868B - A kind of injection advance angle compensation method and system - Google Patents
A kind of injection advance angle compensation method and system Download PDFInfo
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- CN104005868B CN104005868B CN201410191319.7A CN201410191319A CN104005868B CN 104005868 B CN104005868 B CN 104005868B CN 201410191319 A CN201410191319 A CN 201410191319A CN 104005868 B CN104005868 B CN 104005868B
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Abstract
The embodiment of the present invention provides a kind of injection advance angle compensation method and system, and described method includes: main ECU outfan sends test signal, makes main ECU input and receives from ECU input；When main ECU input is received described test signal by main ECU, the reference angle of signal panels is recorded as the first reference angle；From ECU, the reference angle of signal panels when ECU input receives described test signal is recorded as the second reference angle；Using the difference of described first reference angle and described second reference angle as compensating angle, by described compensation angle compensation to main ECU or from the original injection advance angle of ECU；Obtain main ECU or from the compensation injection advance angle of ECU.
Description
Technical field
The present invention relates to technical field of engines, particularly to a kind of injection advance angle compensation method and system.
Background technology
ECU (Electronic Control Unit, electronic control unit) is the microcontroller applied on automobile
Device.Double ECU electromotors that present stage occurs, it is simply that common from ECU by a main ECU and one
Being controlled electromotor, each ECU controls the injection of a part of atomizer.
Can there are the signal panels rotated along with engine speed in existing electromotor, each cylinder is lived
The position of plug all remains known and fixing corresponding relation with the anglec of rotation of signal panels.Cylinder piston arrives
When reaching top dead centre (TDC, Top Dead Center), the angle of signal panels is the upper only angle of this cylinder.
ECU need to control atomizer to in-cylinder injection in the case of opposing pistons TDC reserves certain lead
Fuel oil.To this end, principal and subordinate ECU relative set injection advance angle under specific rotation speeds, ECU above stops described
Angle deducts described injection advance angle, is calculated the oil spout angle of this cylinder fuel injection mouth；ECU spirals at signal
Forward to control atomizer oil spout during the position at oil spout angle, just embodied this lead.Principal and subordinate ECU is equal
It is the angle of the perceptual signal disc spins real-time by sensor, touches at once when signal panels reach oil spout angle
Send out atomizer oil spout；So that ECU perceptual signal dish arrive oil spout angle transducing signal be referred to as timing letter
Number.
In double ECU electromotors, each own independent sensor of principal and subordinate ECU.The defect of prior art
Just it is, the error of process and assemble, or the reason such as transmission delay, often lead to two sensors and occur
Sensing difference.Namely principal and subordinate ECU perceives time of timing signal and differs；And then main ECU control
System atomizer with from ECU control atomizer oil spout asynchronous (if the oil spout of said two atomizer
Angle is identical, should synchronize oil spout in theory)；Cause the cylinder combustion situation that said two atomizer is corresponding
Inconsistent, exacerbate the fluctuation of rotating speed between cylinder.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of injection advance angle compensation method and system, right
Calculating in the injection advance angle of ECU compensates, it is achieved the control atomizer of principal and subordinate ECU synchronizes injection.
For achieving the above object, the present invention has a following technical scheme:
A kind of injection advance angle compensation method, described method includes:
Main ECU outfan sends test signal, makes main ECU input and receives from ECU input；
The reference angle recordings of signal panels when main ECU input is received described test signal by main ECU
It it is the first reference angle；From ECU by the ginseng of signal panels when ECU input receives described test signal
Examining angle recordings is the second reference angle；
Using the difference of described first reference angle and described second reference angle as compensating angle, by described compensation angle
Compensate to main ECU or from the original injection advance angle of ECU；Obtain main ECU or from the benefit of ECU
Repay injection advance angle.
Described main ECU outfan is digital output stitch, described main ECU input and defeated from ECU
Enter end for digital quantity input stitch, the most described send test signal particularly as follows:
Pulse signal is sent by resistance.
Described by described compensation angle compensation to main ECU or from the original injection advance angle of ECU particularly as follows:
Position relationship according to compensating angle and original injection advance angle carries out plus and minus calculation, former by from ECU
Beginning injection advance angle adds compensation angle, obtains the compensation injection advance angle from ECU.
A kind of injection advance angle compensation method, described method includes:
Pre-build compensation model, utilize described compensation model to calculate the compensation angle under the current rotating speed of electromotor；
By on described compensation angle compensation to main ECU or the original injection advance angle from the current rotating speed of ECU,
Obtain main ECU or the compensation injection advance angle from the current rotating speed of ECU.
Described pre-build compensation model particularly as follows:
Preset multiple rated rotational frequencies, calculate the compensation angle that each rated rotational frequency is corresponding；Turn according to each standard
Fast and corresponding compensation angle, sets up rotating speed and the functional relationship compensating angle；Using described functional relationship as institute
State compensation model.
Compensation angle that described calculating rated rotational frequency is corresponding particularly as follows:
When electromotor reaches rated rotational frequency, main ECU outfan sends test signal, makes main ECU defeated
Enter end and receive from ECU input；
The reference angle recordings of signal panels when main ECU input is received described test signal by main ECU
It it is the first reference angle；From ECU by the ginseng of signal panels when ECU input receives described test signal
Examining angle recordings is the second reference angle；
The compensation corresponding as this rated rotational frequency with the difference of described second reference angle using described first reference angle
Angle.
The compensation angle that described calculating rated rotational frequency is corresponding also includes:
When electromotor reaches rated rotational frequency, repeatedly calculate and compensate angle and average, by described meansigma methods
As the compensation angle that this rated rotational frequency is corresponding.
A kind of injection advance angle compensation system, described system includes:
Main ECU, is used for sending test signal, and receives test signal, and self receives described test
During signal, the reference angle of signal panels is recorded as the first reference angle；
From ECU, it is used for receiving test signal, the ginseng of signal panels when self receives described test signal
Examining angle recordings is the first reference angle；
Described main ECU or include compensating module from ECU, described compensating module is for by described first
The difference of reference angle and described second reference angle as compensating angle, by described compensation angle compensation to main ECU or
From the original injection advance angle of ECU；Obtain main ECU or from the compensation injection advance angle of ECU.
A kind of injection advance angle compensation system, described system includes:
Model module, is used for pre-building compensation model, utilizes described compensation model to calculate electromotor current
Compensation angle under rotating speed；
Compensating module, for by described compensation angle compensation to main ECU or former from the current rotating speed of ECU
On beginning injection advance angle, obtain main ECU or the compensation injection advance angle from the current rotating speed of ECU.
Described model module includes:
Rotating speed unit, is used for presetting multiple rated rotational frequency；
Computing unit, for calculating the compensation angle that each rated rotational frequency is corresponding；
Function unit, for the compensation angle according to each rated rotational frequency and correspondence, sets up rotating speed and compensates angle
Functional relationship；Using described functional relationship as described compensation model.
When electromotor reaches rated rotational frequency, main ECU outfan sends test signal, makes main ECU defeated
Enter end and receive from ECU input；The most described computing unit includes:
First record subelement, signal panels when main ECU input is received described test signal
It is recorded as the first reference angle with reference to angle；
Second record subelement, for receiving described test signal from ECU input from ECU
Time signal panels reference angle be recorded as the second reference angle；
Compensate silver coin unit, be used for the difference of described first reference angle and described second reference angle as this
The compensation angle that rated rotational frequency is corresponding.
As seen through the above technical solutions, present invention existence provides the benefit that: by being calculated compensation
Original injection advance angle is also compensated by angle, it is achieved that the synchronization oil spout of principal and subordinate ECU；Realize by advance
If mathematical model directly calculate compensation angle compensating, simplify the stream of described injection advance angle compensation
Journey, improves efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is some embodiments of the present invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Figure 1A～Fig. 1 C is the structural representation of signal panels in prior art；
Fig. 2 A～Fig. 2 B is the square wave signal of telecommunication schematic diagram that in prior art, sensor receives；
Fig. 3 is method flow diagram described in the embodiment of the present invention；
Fig. 4 is that principal and subordinate ECU sends and receive test signal schematic representation
Fig. 5 A～Fig. 5 C is injection advance angle and the square wave schematic diagram compensating angle；
Fig. 6 is system structure schematic diagram described in the embodiment of the present invention；
Fig. 7 is method flow diagram described in another embodiment of the present invention；
Fig. 8 is system structure schematic diagram described in another embodiment of the present invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with this
Accompanying drawing in bright embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of protection of the invention.
For ease of to the explanation of overall technical architecture of the present invention and explanation, the present invention is by concrete description principal and subordinate
ECU perception timing signal, and the principle controlling atomizer oil spout is as follows:
With reference to shown in Fig. 1, for described signal panels and the schematic diagram of sensor.The present invention supposes described letter
Dialer is 60 gears lacking 2 teeth, and signal panels rotate a tooth and i.e. rotate 6 °.Principal and subordinate ECU is respectively arranged with a biography
Sensor, is arranged in signal panels edge.Between principal and subordinate's ECU sensor, angle is α °.
ECU sensor utilizes peripheral circuit that the concavo-convex change of gear teeth is converted to the square wave signal of telecommunication, such as figure
2.The sensor of principal and subordinate ECU is all as a reference point with the signal of telecommunication at hypodontia, namely scarce when perceiving
At tooth, the lower edge of the square wave signal of telecommunication, then start the calculating of angle.Figure 1A i.e. shows main ECU sensor
Arrive the situation of reference point.
Additionally, also need to set up with reference to angle for signal panels and actual condition, will be from electromotor in the present invention
In selected one and think when the described piston with reference to cylinder arrives TDC with reference to cylinder, corresponding letter
The position of dialer is with reference to 0 °, remaining all of oil spout angle and the angle value at upper only angle, all means relatively
Reference angle in reference 0 °.
See shown in Figure 1B, i.e. describe main ECU sensor after reference point, rotate the most counterclockwise
β °, signal panels reach the situation with reference to 0 °.Visible by the square wave schematic diagram shown in Fig. 2, main
After ECU sensor arrives reference point, arrive with reference to 0 ° through β °；Arrive from ECU sensor
After reference point, need to arrive with reference to 0 ° through (alpha+beta) °.
Referring next to Fig. 1 C, it is assumed that the first atomizer that main ECU controls and second controlled from ECU
The oil spout angle of atomizer is 30 °, and namely on the position of Figure 1B, described signal panels continue the inverse time
Pin rotates 30 ° (5 teeth of corresponding gear produce 5 square-wave signals), and principal and subordinate ECU will connect simultaneously
Receive timing signal, and then control the first atomizer and the synchronization oil spout of the second atomizer.See Fig. 2, work as master
ECU sensor perceives in Fig. 2 A under the square wave of institute's labelling along signal of telecommunication a, i.e. means to receive timing letter
Number；In like manner perceive Fig. 2 B under the square wave of institute's labelling along signal of telecommunication b from ECU sensor, i.e. mean
And receive timing signal.
In theory, main ECU sensor perceive signal of telecommunication a and perceive signal of telecommunication b from ECU should
In the same moment, so the oil spout of described first atomizer and the second atomizer is also to synchronize.But
In actual application, many error components the two can be caused to perceive timing signal is temporal differs
Cause, thereby resulted in the asynchronous of oil spout, caused the cylinder combustion situation that said two atomizer is corresponding not
Unanimously, the fluctuation of rotating speed between cylinder is exacerbated.
Shown in Figure 3, for the specific embodiment of injection advance angle compensation method of the present invention.This reality
The calculating executing in example the injection advance angle for ECU compensates, it is achieved the control atomizer of principal and subordinate ECU with
Step injection.Described in the present embodiment, method comprises the following steps:
Step 301, main ECU outfan send test signal, make main ECU input and defeated from ECU
Enter end to receive.
Shown in Figure 4, for ECU main in the present embodiment and the structural representation from ECU.Described master
ECU outfan is digital output stitch, described main ECU input and from ECU input be numeral
Amount input stitch, described test signal is pulse signal.The outfan of main ECU sends a pulse signal,
Main ECU input is flowed to respectively and from ECU input by resistance.It could be theoretically argued that, principal and subordinate ECU
Input to receive moment of described pulse signal be identical, principal and subordinate's ECU sensor is in this moment
Also it is identical on the signal panels reference angle topology degree of perception.But due to sensing delay and frock error,
Principal and subordinate's ECU sensor actually and differs with reference to angle at the signal panels of this moment perception, and the two
The signal panels of perception, with reference to the difference of angle, the i.e. relative delay of principal and subordinate ECU perception timing signal, are also
Compensation angle required by described method.
The reference of signal panels when main ECU input is received described test signal by step 302, main ECU
Angle recordings is the first reference angle；To believe when ECU input receives described test signal from ECU
The reference angle of dialer is recorded as the second reference angle.
Although main ECU and the relative delay from ECU perception timing signal, it is substantially temporal prolonging
Late；But by foregoing teachings it is known that the present invention does not weigh this length of delay with unit of time, and
It is to weigh and calculate this delay with by the angle of signal panels.It is to say, the time conversion that will postpone
Become the angle that signal panels rotated within time delay.
Main ECU receives the moment of test signal, is i.e. reflected as main ECU input and receives described survey
The reference angle of signal panels during trial signal, main ECU is using this angle recordings and as the first reference angle.From
ECU receives the moment of test signal, is i.e. reflected as when ECU input receives described test signal
The reference angle of signal panels, from ECU using this angle recordings and as the second reference angle.
Step 303, using the difference of described first reference angle and described second reference angle as compensating angle, by institute
State compensation angle compensation to main ECU or from the original injection advance angle of ECU；Obtain main ECU or from ECU
Compensation injection advance angle.
The difference that angle can be the first reference angle and the second reference angle is compensated described in the present embodiment.Principal and subordinate ECU
Injection advance angle for compensating becomes original injection advance angle, and the injection advance angle after compensating becomes compensation
Injection advance angle.The most described compensation angle can compensate main ECU or from either party former of ECU
On beginning injection advance angle, but the most often compensate from ECU.The computing of described compensation is i.e.
Plus and minus calculation is carried out according to compensating the angle position relationship with original injection advance angle.
With reference to square wave schematic diagram as shown in Figure 5, Fig. 5 A is the square wave schematic diagram that main ECU sensor receives,
Fig. 5 B is the square wave schematic diagram received from ECU, and injection advance angle does not compensates.Contrast visible, the two
Original injection advance angle be 12 °, but relatively lag behind from ECU, so the oil spout of principal and subordinate ECU
Asynchronous.Can be calculated by said method, compensate angle i.e. from angle delayed for ECU be 5 °,
And be added compensating angle with the original injection advance angle from ECU, obtain the compensation injection advance from ECU
Angle is (12+5)=17 °.After compensation as shown in Figure 5 C.Comparison diagram 5A and Fig. 5 C, it is seen that after compensation,
The oil spout of principal and subordinate ECU realizes synchronizing.
A specific embodiment for system of the present invention shown in Figure 6, in embodiment illustrated in fig. 3
Described method is i.e. applied in the middle of the system shown in Fig. 6.Described system includes:
Main ECU, is used for sending test signal, and receives test signal, and self receives described test
During signal, the reference angle of signal panels is recorded as the first reference angle.
From ECU, it is used for receiving test signal, the ginseng of signal panels when self receives described test signal
Examining angle recordings is the first reference angle.
Described main ECU or include compensating module from ECU, described compensating module is for by described first
The difference of reference angle and described second reference angle as compensating angle, by described compensation angle compensation to main ECU or
From the original injection advance angle of ECU；Obtain main ECU or from the compensation injection advance angle of ECU.
Described compensating module can be placed in main ECU or from ECU, i.e. wraps from ECU shown in Fig. 6
Include the concrete condition of compensating module.
As seen through the above technical solutions, the present embodiment existence provides the benefit that: by being calculated benefit
Repay angle and original injection advance angle is compensated, it is achieved that the synchronization oil spout of principal and subordinate ECU.
Shown in Figure 7, for another specific embodiment of the method for the invention.The present embodiment exists
On the basis of embodiment illustrated in fig. 3, peel off the process wherein calculating described compensation angle, and by this mistake
Journey is made as mathematical model；Thus without double counting in each compensation process again so that described method
Flow process further simplifies.
It should be noted that owing to the setting of injection advance angle is relevant to engine speed, so mend
The concrete numerical value repaying angle is also associated with rotating speed, and the numerical value compensating angle in other words may be considered rotating speed
Function.In the present embodiment, i.e. utilize in previous embodiment calculate compensate angle method, set up rotating speed with
Compensate the functional relationship at angle；Thus under actual condition, it is possible to directly obtain compensation angle also by rotating speed
Compensate.
Shown in Figure 7, in the present embodiment, said method comprising the steps of:
Step 701, pre-build compensation model, utilize described compensation model to calculate under the current rotating speed of electromotor
Compensation angle.
In the present embodiment, the thinking setting up described compensation model is specific as follows:
S1, default multiple rated rotational frequencies, calculate the compensation angle that each rated rotational frequency is corresponding.
Known fuel injection advance angle is all corresponding with rotating speed with compensation angle, thus the most selected in the present embodiment
Multiple representative rated rotational frequencies, and calculate the concrete numerical value compensating angle under rated rotational frequency.
The method calculating compensation angle under described rated rotational frequency is referred in step 301～step 302
Describe；Or specifically it is summarised as:
When electromotor reaches rated rotational frequency, main ECU outfan sends test signal, makes main ECU defeated
Enter end and receive from ECU input；
The reference angle recordings of signal panels when main ECU input is received described test signal by main ECU
It it is the first reference angle；From ECU by the ginseng of signal panels when ECU input receives described test signal
Examining angle recordings is the second reference angle；
The compensation corresponding as this rated rotational frequency with the difference of described second reference angle using described first reference angle
Angle.
S2, the angle that compensates according to each rated rotational frequency and correspondence are set up rotating speed and compensate the functional relationship at angle；Will
Described functional relationship is as described compensation model.
After having obtained multiple rated rotational frequency and corresponding compensation angle, set up straight according to rotating speed with compensating angle
Angle coordinate system, and draw out rotating speed by described point interpolation method and compensate the function curve at angle, form the two it
Between functional relationship.This functional relationship i.e. compensation model described in the present embodiment.
Step 702, by described compensation angle compensation to main ECU or the original oil spout from the current rotating speed of ECU
In advance angle, obtain main ECU or the compensation injection advance angle from the current rotating speed of ECU.
Also, it should be noted in the present embodiment, for making described compensation model the most accurate, it is also possible to increase
Add following steps:
Step s1.1, when electromotor reaches rated rotational frequency, repeatedly calculates and compensates angle and average, by institute
State meansigma methods as compensation angle corresponding to this rated rotational frequency.
It is to say, the present embodiment can repeatedly calculate the compensation angle that certain rated rotational frequency is corresponding, and take
The meansigma methods repeatedly calculated, to reduce error.
Shown in Figure 8, for a specific embodiment of system of the present invention, described in the present embodiment
Method shown in system corresponding diagram 7, described system specifically includes:
Model module, is used for pre-building compensation model, utilizes described compensation model to calculate electromotor current
Compensation angle under rotating speed.
Described model module includes:
Rotating speed unit, is used for presetting multiple rated rotational frequency.
Computing unit, for calculating the compensation angle that each rated rotational frequency is corresponding.
When electromotor reaches rated rotational frequency, main ECU outfan sends test signal, makes main ECU defeated
Enter end and receive from ECU input；The most described computing unit includes:
First record subelement, signal panels when main ECU input is received described test signal
It is recorded as the first reference angle with reference to angle.
Second record subelement, for receiving described test signal from ECU input from ECU
Time signal panels reference angle be recorded as the second reference angle.
Compensate silver coin unit, be used for the difference of described first reference angle and described second reference angle as this
The compensation angle that rated rotational frequency is corresponding.
Function unit, for the compensation angle according to each rated rotational frequency and correspondence, sets up rotating speed and compensates angle
Functional relationship；Using described functional relationship as described compensation model.
Compensating module, for by described compensation angle compensation to main ECU or former from the current rotating speed of ECU
On beginning injection advance angle, obtain main ECU or the compensation injection advance angle from the current rotating speed of ECU.
As seen through the above technical solutions, the present embodiment existence provides the benefit that, it is achieved by default
Mathematical model directly calculates compensation angle and compensates, and simplifies the flow process of described injection advance angle compensation,
Improve efficiency.
The above is only the preferred embodiment of the present invention, it is noted that general for the art
For logical technical staff, under the premise without departing from the principles of the invention, it is also possible to make some improvement and profit
Decorations, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (7)
1. an injection advance angle compensation method, it is characterised in that described method includes:
Main ECU outfan sends test signal, makes main ECU input and receives from ECU input；
When main ECU input is received described test signal by main ECU, the reference angle of signal panels is recorded as
First reference angle；From ECU by the reference angle of signal panels when ECU input receives described test signal
Degree is recorded as the second reference angle；
Using the difference of described first reference angle and described second reference angle as compensating angle, by described compensation angle
Compensate to main ECU or from the original injection advance angle of ECU；Obtain main ECU or spray from the compensation of ECU
Advance angle oil；
Wherein, described main ECU and be respectively arranged with a sensor from ECU, it is arranged in signal panels edge；
The reference angle of described signal panels is: a selected reference cylinder from electromotor, and sets institute
When stating the piston arrival top dead centre with reference to cylinder, the position of corresponding signal panels is with reference to 0 °, and remaining owns
Oil spout angle and the angle value at upper only angle, be relative to reference to the reference angle of 0 °.
Method the most according to claim 1, it is characterised in that described main ECU outfan is digital quantity
Output stitch, described main ECU input and be that digital quantity inputs stitch from ECU input, then described send out
Send test signal particularly as follows:
Pulse signal is sent by resistance.
Method the most according to claim 1, it is characterised in that described by described compensation angle compensation to main
ECU or from the original injection advance angle of ECU particularly as follows:
Position relationship according to compensating angle and original injection advance angle carries out plus and minus calculation, former by from ECU
Beginning injection advance angle adds compensation angle, obtains the compensation injection advance angle from ECU.
4. an injection advance angle compensation method, it is characterised in that described method includes:
Pre-build compensation model, utilize described compensation model to calculate the compensation angle under the current rotating speed of electromotor；
By on described compensation angle compensation to main ECU or the original injection advance angle from the current rotating speed of ECU,
Obtain main ECU or the compensation injection advance angle from the current rotating speed of ECU；
Described pre-build compensation model particularly as follows:
Preset multiple rated rotational frequencies, calculate the compensation angle that each rated rotational frequency is corresponding；Turn according to each standard
Fast and corresponding compensation angle, sets up rotating speed and the functional relationship compensating angle；Using described functional relationship as institute
State compensation model；
Compensation angle that described calculating rated rotational frequency is corresponding particularly as follows:
When electromotor reaches rated rotational frequency, main ECU outfan sends test signal, makes main ECU input
Hold and receive from ECU input；
When main ECU input is received described test signal by main ECU, the reference angle of signal panels is recorded as
First reference angle；From ECU by the reference angle of signal panels when ECU input receives described test signal
Degree is recorded as the second reference angle；
The compensation corresponding as this rated rotational frequency with the difference of described second reference angle using described first reference angle
Angle；
Wherein, the reference angle of described signal panels is: a selected reference cylinder from electromotor, and
When setting the piston arrival top dead centre of described reference cylinder, the position of corresponding signal panels is with reference to 0 °, its
Remaining all of oil spout angle and the angle value at upper only angle, be the reference angle relative to reference 0 °.
Method the most according to claim 4, it is characterised in that the benefit that described calculating rated rotational frequency is corresponding
Repay angle also to include:
When electromotor reaches rated rotational frequency, repeatedly calculate and compensate angle and average, by described meansigma methods
As the compensation angle that this rated rotational frequency is corresponding.
6. an injection advance angle compensation system, it is characterised in that described system includes:
Main ECU, is used for sending test signal, and receives test signal, and self receives described test letter
Number time signal panels reference angle be recorded as the first reference angle；
From ECU, it is used for receiving test signal, the reference of signal panels when self receives described test signal
Angle recordings is the second reference angle；
Described main ECU or include compensating module from ECU, described compensating module will be for will described first join
Examine the difference of angle and described second reference angle as compensating angle, by described compensation angle compensation to main ECU or from
On the original injection advance angle of ECU；Obtain main ECU or from the compensation injection advance angle of ECU；
Wherein, described main ECU and be respectively arranged with a sensor from ECU, it is arranged in signal panels edge；
The reference angle of described signal panels is: a selected reference cylinder from electromotor, and sets institute
When stating the piston arrival top dead centre with reference to cylinder, the position of corresponding signal panels is with reference to 0 °, and remaining owns
Oil spout angle and the angle value at upper only angle, be relative to reference to the reference angle of 0 °.
7. an injection advance angle compensation system, it is characterised in that described system includes:
Model module, is used for pre-building compensation model, utilizes described compensation model to calculate electromotor current
Compensation angle under rotating speed；
Compensating module, for by described compensation angle compensation to main ECU or original from the current rotating speed of ECU
On injection advance angle, obtain main ECU or the compensation injection advance angle from the current rotating speed of ECU；
Described model module includes:
Rotating speed unit, is used for presetting multiple rated rotational frequency；
Computing unit, for calculating the compensation angle that each rated rotational frequency is corresponding；
Function unit, for the compensation angle according to each rated rotational frequency and correspondence, sets up rotating speed and compensates angle
Functional relationship；Using described functional relationship as described compensation model；
When electromotor reaches rated rotational frequency, main ECU outfan sends test signal, makes main ECU input
Hold and receive from ECU input；The most described computing unit includes:
First record subelement, signal panels when main ECU input is received described test signal
It is recorded as the first reference angle with reference to angle；
Second record subelement, for will will be when ECU input receives described test signal from ECU
The reference angle of signal panels is recorded as the second reference angle；
Compensate silver coin unit, be used for the difference of described first reference angle and described second reference angle as this
The compensation angle that rated rotational frequency is corresponding；
Wherein, the reference angle of described signal panels is: a selected reference cylinder from electromotor, and
When setting the piston arrival top dead centre of described reference cylinder, the position of corresponding signal panels is with reference to 0 °, its
Remaining all of oil spout angle and the angle value at upper only angle, be the reference angle relative to reference 0 °.
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| CN109356737A (en) * | 2018-09-30 | 2019-02-19 | 潍柴动力股份有限公司 | A kind of control method and system of multicylinder engine |
| CN113348421B (en) * | 2021-04-28 | 2023-02-28 | 华为技术有限公司 | Camera equipment, data acquisition system and method |
| CN114962045B (en) * | 2022-05-26 | 2023-04-07 | 上海工程技术大学 | Multi-cylinder synchronous control method for marine low-speed engine |
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| FR2531749B1 (en) * | 1982-08-11 | 1987-03-20 | Renault | DEVICE FOR CONTROLLING THE IGNITION AND FUEL INJECTION FOR AN INTERNAL COMBUSTION ENGINE |
| EP1543389B1 (en) * | 2002-09-16 | 2007-04-18 | Robert Bosch Gmbh | Method and computer system for operating at least two interconnected control devices |
| EP2719599A4 (en) * | 2011-06-07 | 2017-05-10 | Daesung Electric Co., Ltd. | Device and method for detecting error in dual controller system |
| CN102493886B (en) * | 2011-11-30 | 2014-04-30 | 潍柴动力股份有限公司 | Method and device for correcting opening time of fuel injector |
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