CN104088708B - Active vibration reduction method for dual-fuel engine - Google Patents
Active vibration reduction method for dual-fuel engine Download PDFInfo
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- CN104088708B CN104088708B CN201410306814.8A CN201410306814A CN104088708B CN 104088708 B CN104088708 B CN 104088708B CN 201410306814 A CN201410306814 A CN 201410306814A CN 104088708 B CN104088708 B CN 104088708B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The invention discloses an active vibration reduction method for a dual-fuel engine of a vehicle. Dual fuels comprise the first fuel and the second fuel. The active vibration reduction method for the dual-fuel engine comprises the following steps that S1, fluctuation of rotating speed of the dual-fuel engine is detected; S2, the fluctuation of the rotating speed of the dual-fuel engine is adjusted by synchronously changing the ultimate fuel-injection quantity of one of the first fuel and the second fuel in each working cycle of the dual-fuel engine at the same frequency as the fluctuation of the rotating speed. According to the active vibration reduction method for the dual-fuel engine of the vehicle, the ultimate fuel-injection quantity of one of the first fuel and the second fuel is synchronously changed according to the frequency of the fluctuation of the rotating speed of the dual-fuel engine, the phenomenon that due to simultaneous change of the ultimate fuel-injection quantity of the first fuel and the ultimate fuel-injection quantity of the second fuel, working is asynchronous is avoided, the fluctuation of the rotating speed of the dual-fuel engine is smooth in an acceleration or deceleration process of the whole vehicle, and the active vibration effect is good.
Description
Technical field
The present invention relates to engine art, in particular to a kind of active damping method for dual fuel engine.
Background technology
The active damping method of electromotor refers to, by adjusting the fluctuation of speed using compensation moment of torsion in torque structure
Method, will compensate moment of torsion and be converted into oil mass according to map, after each cycle detection is to the fluctuation of speed, entire car controller root
According to the certain moment of torsion of the increase and decrease of the fluctuation of speed, required for then calculating, the oil mass of increase and decrease, sprays in cylinder in subsequent cycle.
Dual fuel engine passes through the fuel gas such as gas-duct jetting gasoline, methanol, natural gas, by cylinder injection diesel oil
Electromotor, the combustion system of this electromotor reduces oil consumption and the discharge of electromotor.
Dual fuel engine has the fluctuation of speed during car load acceleration and deceleration, needs by the double combustion of active damping method balance
The fluctuation of speed of material electromotor, in correlation technique, there is problems with the active damping method of dual fuel engine, turns round when compensating
When square is converted into distributive value, gained distributive value includes petrol level ga and diesel oil oil mass, and diesel oil, after spraying into when circulation, works as circulation
Work by combustion, but gasoline does work in subsequent cycle after spraying into, and thereby results in asynchronous, active damping effect is bad, there is improvement
Space.
Content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.For this reason, the present invention
One purpose is to propose a kind of good active damping method for dual fuel engine of active damping effect.
To achieve these goals, propose one kind according to embodiments of the present invention and be used for dual fuel engine active damping side
Method, described double fuel includes the first fuel and the second fuel, the described active damping method for dual fuel engine include with
Lower step：
S1：The fluctuation of speed of detection dual fuel engine；
S2:Existed with changing one of the first fuel and the second fuel fuel with described fluctuation of speed identical Frequency Synchronization
The fluctuation of speed to adjust dual fuel engine for the final distributive value in each power cycles of described dual fuel engine.
In short, the active damping method for dual fuel engine according to embodiments of the present invention, sent out according to double fuel
The Frequency Synchronization ground of the fluctuation of speed of motivation changes the final distributive value of one of the first fuel and the second fuel fuel, effectively
Avoid and change the work done asynchrony phenomenon that the final distributive value of the first fuel and the second fuel causes simultaneously, so that double fuel is started
Machine fluctuation of speed smooth-going and active damping effect is good during car load acceleration-deceleration.
In addition, the active damping method for dual fuel engine according to the above embodiment of the present invention can also have as
Lower additional technical characteristic：
According to one embodiment of present invention, described step S2 comprises the following steps：
S21：According to the fluctuation of speed of dual fuel engine, calculate the compensation moment of torsion of described dual fuel engine；
S22：The compensation moment of torsion of described dual fuel engine is carried out obtaining described double combustion after maximum restriction and minimum limit
The actual compensation moment of torsion of material electromotor；
S23：The described actual compensation distributive value compensating a kind of corresponding described fuel of moment of torsion is found according to map；
S24：The described actual torque compensation that compensates is obtained moment of torsion after car load compensates in car load moment of torsion, car load is turned round after compensating
Square transmits in car load and calculates the actual torque of described dual fuel engine；
S25：Described actual torque with described actual compensate moment of torsion difference be described dual fuel engine compensation before moment of torsion,
Found and the distributive value of corresponding first fuel of moment of torsion and the distributive value of the second fuel before described compensation according to map；
S26：A kind of distributive value that compensates of described fuel is a kind of described fuel with a kind of distributive value sum of described fuel
Final distributive value.
According to one embodiment of present invention, described S22 comprises the following steps：
S221：Judge the described maximum size compensating moment of torsion compensating moment of torsion and described dual fuel engine；
S222：If described compensation moment of torsion is more than or equal to described maximum compensation moment of torsion, the described actual moment of torsion that compensates is institute
State maximum compensation moment of torsion；
S223：If described compensation moment of torsion is less than described maximum compensation moment of torsion, judge that described compensation moment of torsion is double with described
The minimum size compensating moment of torsion of engine fuel；
S224：If described compensation moment of torsion is more than or equal to described minimum compensation moment of torsion, the described actual moment of torsion that compensates is institute
State compensation moment of torsion；
S225：If described compensation moment of torsion be less than described minimum compensate moment of torsion, described actual compensate moment of torsion be described
Little compensation moment of torsion.
According to one embodiment of present invention, one of described first fuel and described second fuel are gasoline and another
Individual for diesel oil.
According to one embodiment of present invention, a kind of described fuel is diesel oil, the described final oil spout in described step S2
Measure the final main jet oil mass for described diesel oil.
According to one embodiment of present invention, described step S2 comprises the following steps：
S21：According to the fluctuation of speed of described dual fuel engine, calculate the compensation moment of torsion of described dual fuel engine；
S22：The described moment of torsion that compensates is carried out obtaining the reality of described dual fuel engine after maximum restriction and minimum limit
Compensate moment of torsion；
S23：The described actual moment of torsion corresponding diesel oil main jet that compensates is found according to map and compensates distributive value；
S24：The described actual torque compensation that compensates is obtained moment of torsion after car load compensates in car load moment of torsion, car load is turned round after compensating
Square transmits in car load and calculates the actual torque of described dual fuel engine；
S25：Described actual torque with described actual compensate moment of torsion difference be described dual fuel engine compensation before moment of torsion,
Distributive value with moment of torsion corresponding diesel oil main jet oil mass, the pre- distributive value of diesel oil and gasoline before described compensation is found according to map；
S26：Described diesel oil main jet compensates the final main jet that distributive value is described diesel oil with described diesel oil main jet oil mass sum
Oil mass.
Brief description
Fig. 1 is the flow chart of the active damping method for dual fuel engine according to embodiments of the present invention.
Fig. 2 is the flow chart of the active damping method for dual fuel engine according to embodiments of the present invention.
Fig. 3 is the flow chart of the active damping method for dual fuel engine according to embodiments of the present invention.
Fig. 4 is the flow chart of the active damping method for dual fuel engine according to embodiments of the present invention.
Fig. 5 is the logic chart of the active damping method for dual fuel engine according to an embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary it is intended to be used for explaining the present invention, and is not considered as limiting the invention.
Referring to Fig. 1-Fig. 5, the dual fuel engine active damping side for vehicle according to embodiments of the present invention is described
Method.Double fuel includes the first fuel and the second fuel.
As Figure 1-Figure 5, the dual fuel engine active damping method for vehicle comprises the following steps：
S1：The fluctuation of speed of detection dual fuel engine；
S2:To change one of the first fuel and the second fuel fuel in double combustions with fluctuation of speed identical Frequency Synchronization
The fluctuation of speed to adjust dual fuel engine for the final distributive value Q in each power cycles of material electromotor.
In step sl, the fluctuation of speed of dual fuel engine can be by being arranged on the bent axle of dual fuel engine
Speed probe obtains, and entire car controller can be calculated in each power cycles according to the rotating speed that speed probe detects
Dual fuel engine the fluctuation of speed.
In step s 2, only pass through change one of the first fuel and the second fuel fuel every in dual fuel engine
The fluctuation of speed to balance dual fuel engine for the final distributive value in individual power cycles, thus eliminate the first fuel and second
Fuel can not work done simultaneously problem, make the counterbalance effect of the fluctuation of speed more preferably, so that the rising of the rotating speed of dual fuel engine is made
The effectiveness in vibration suppression of the active damping method of dual fuel engine is more preferable.
Specifically, with the first fuel as gasoline with one of diesel oil, the second fuel is another in gasoline and diesel oil
Individual, and by change gasoline final distributive value balance the fluctuation of speed of dual fuel engine as a example, due to gasoline pass through gas
Road sprays, thus the gasoline being sprayed into final distributive value Q is in next power cycles work done.
With the first fuel as gasoline with one of diesel oil, the second fuel is another in gasoline and diesel oil, and passes through
Change the final distributive value of diesel oil to balance the fluctuation of speed of dual fuel engine as a example, because diesel oil passes through cylinder injection, because
And the diesel oil being sprayed into final distributive value is when power cycles work done.
As shown in Fig. 2 step S2 comprises the following steps：
S21：According to the fluctuation of speed of dual fuel engine, calculate compensation torque T c1 of dual fuel engine；
S22：Compensation torque T c1 of dual fuel engine is carried out maximum limit and minimum limit after obtain double fuel and start
Actual compensation torque T c2 of machine；
S23：Find a kind of compensation distributive value q of the corresponding described fuel of actual compensation torque T c2 according to map；
S24：Actual compensation torque T c2 is compensated and in car load torque T v, obtains torque T v1 after car load compensates, Tv1=Tc2
+ Tv, after car load compensates, torque T v1 is transmitted in car load and is calculated the actual torque Tc3 of dual fuel engine；
S25：Turn round before the compensation that actual torque Tc3 is dual fuel engine with the actual difference (Tc3-Tc2) compensating torque T c2
Square Tc4, finds the distributive value Q1 of first fuel corresponding with the compensating front torque T c4 and distributive value Q2 of the second fuel according to map；
S26：A kind of compensation distributive value q of described fuel and a kind of distributive value sum of described fuel are a kind of described fuel
Final distributive value Q.
It is understood that car load torque T v is the moment of torsion by obtaining through moment of torsion filtering to the demand torque of car load
Filtering is to those skilled in the art it is known that here no longer describes in detail.
That is, change one of the first fuel and the second fuel fuel following in each work done of dual fuel engine
Final distributive value Q in ring is to be realized by changing the moment of torsion in torque structure, and the relation between moment of torsion and distributive value can
To be obtained by the map figure of dual fuel engine.It is understood that each dual fuel engine has a corresponding map
Figure, map figure is known to those skilled in the art.
In other words, final distributive value Q is calculated, and moment of torsion is true transmission in the torque structure of car load,
And obtain torque T v1 after car load compensates in car load torque T v by compensating actual compensation torque T c2, so that car load is turned round after compensating
Square Tv1 obtains the actual torque Tc3 of dual fuel engine after a series of calculating, transmission and communication.
It is understood that the actual torque Tc3 of dual fuel engine is through accurately calculated, because double fuel
Each auxiliary function of electromotor, such as ABS function, 4 wheel driven function etc. is required for accurate calculated torque.
Specifically, after car load compensates, torque T v1 is through zero passage fuel-flow control, Overrun, starting torque calculating, inside
Obtain the actual torque Tc3 of dual fuel engine after setting torque arithmetic, and before being converted to distributive value, compensate actual
Torque T c2 cuts from the actual torque Tc3 of dual fuel engine, is compensated front torque T c4, wherein Tc4=after cutting
(Tc3-Tc2).Find the distributive value Q1 of first fuel corresponding with compensating front torque T c4 and the oil spout of the second fuel according to map
Amount Q2, is finally added, with a kind of described distributive value of fuel, the final distributive value obtaining a kind of described fuel by compensating distributive value q
Q.Thus, only fluctuated come balancing speed by changing a kind of final distributive value Q of fuel, it is to avoid change simultaneously the first fuel and
The asynchronous problem of work done that second fuel causes.
Further, if with every in dual fuel engine with fluctuation of speed identical Frequency Synchronization change the first fuel
Final distributive value Q, then Q=Q1+q in individual power cycles；If to change the first combustion with fluctuation of speed identical Frequency Synchronization
Final distributive value Q, then Q=Q2+q in each power cycles of dual fuel engine for the material.
As shown in figure 3, step S22 comprises the following steps：
S221：Judge to compensate the maximum size compensating torque T cmax of torque T c1 and dual fuel engine；
S222：If compensating torque T c1 to be more than or equal to maximum compensation torque T cmax, actual torque T c2 that compensates is maximum
Compensate torque T cmax；
S223：If compensating torque T c1 to be less than maximum compensation torque T cmax, judge that compensating torque T c1 is sent out with double fuel
The minimum size compensating torque T cmin of motivation；
S224：If compensating torque T c1 to be more than or equal to minimum compensation torque T cmin, actual torque T c2 that compensates is to compensate
Torque T c1；
S225：If compensating torque T c1 to be less than minimum compensation torque T cmin, actual torque T c2 that compensates is minimum compensation
Torque T cmin.
That is, Tc1 is carried out in step S22 with maximum limit and minimum limit refers to：
First determine whether the size of Tc1 and Tcmax, if Tc1 >=Tcmax, Tc2=Tcmax；If Tc1 is ＜ Tcmax, sentence
The size of disconnected Tc1 and Tcmin, if Tcmin≤Tc1 is ＜ Tcmax, Tc2=Tc1；If Tc1 is ＜ Tcmin, Tc2=Tcmin.
So, by step S22, Tc1 is carried out maximum limit and minimum limit, can prevent that torque compensation is excessive to cause driving
Property fluctuation it is also possible to prevent torque compensation too small and do not have adjust the fluctuation of speed effect.
With reference to Fig. 4 and Fig. 5, in a specific embodiment of the present invention, a kind of described fuel is diesel oil, in step S2
Final distributive value Q refer to the final distributive value Q bavin of diesel oil.
Specifically, step S2 of the active damping method for dual fuel engine according to embodiments of the present invention includes
Following steps：
S21：According to the fluctuation of speed of dual fuel engine, calculate compensation torque T c1 of dual fuel engine；
S22：Compensation torque T c1 of dual fuel engine is carried out maximum limit and minimum limit after obtain double fuel and start
Actual compensation torque T c2 of machine；
S23：The corresponding diesel oil main jet of actual compensation torque T c2 is found according to map and compensates distributive value q master；
S24：Actual compensation torque T c2 is compensated and in car load torque T v, obtains torque T v1 after car load compensates, car load compensates
Torque T v1 is transmitted in car load and is calculated the actual torque Tc3 of dual fuel engine afterwards；
S25：Turn round before the compensation that actual torque Tc3 is dual fuel engine with the actual difference (Tc3-Tc2) compensating torque T c2
Square Tc4, finds diesel oil main jet oil mass Q master corresponding with compensating front torque T c4, diesel oil pre- distributive value Q according to map pre- and gasoline
Distributive value Q vapour；
S26：It is final main jet oil mass Q of diesel oil that diesel oil main jet compensates distributive value q master with the main sum of diesel oil main jet oil mass Q
Bavin, i.e. Q bavin=q master+Q master.
Certainly, the gasoline in the present invention can be substituted with the fuel gas such as methanol, natural gas.
In short, the active damping method for dual fuel engine according to embodiments of the present invention, sent out according to double fuel
The Frequency Synchronization ground of the fluctuation of speed of motivation changes the final distributive value of one of the first fuel and the second fuel fuel, effectively
Avoid and change the work done asynchrony phenomenon that the final distributive value of the first fuel and the second fuel causes simultaneously, so that double fuel is started
Machine fluctuation of speed smooth-going and active damping effect is good during car load acceleration-deceleration.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
Combine in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combine.
Although embodiments of the invention have been shown and described above it is to be understood that above-described embodiment is example
Property it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (6)
1. a kind of dual fuel engine active damping method for vehicle is it is characterised in that described double fuel includes the first combustion
Material and the second fuel, described dual fuel engine active damping method comprises the following steps：
S1：The fluctuation of speed of detection dual fuel engine；
S2:To change one of the first fuel and the second fuel fuel described with described fluctuation of speed identical Frequency Synchronization
The fluctuation of speed to adjust dual fuel engine for the final distributive value in each power cycles of dual fuel engine.
2. the dual fuel engine active damping method for vehicle according to claim 1 is it is characterised in that described step
Rapid S2 comprises the following steps：
S21：According to the fluctuation of speed of dual fuel engine, calculate the compensation moment of torsion of described dual fuel engine；
S22：The compensation moment of torsion of described dual fuel engine is carried out maximum limit and minimum limit after obtain described double fuel and send out
The actual compensation moment of torsion of motivation；
S23：The described actual compensation distributive value compensating a kind of corresponding described fuel of moment of torsion is found according to map；
S24：The described actual torque compensation that compensates is obtained moment of torsion after car load compensates in car load moment of torsion, after car load compensates, moment of torsion exists
Transmit and calculate the actual torque of described dual fuel engine in car load；
S25：Described actual torque with described actual compensate moment of torsion difference be described dual fuel engine compensation before moment of torsion, according to
Map finds and the distributive value of corresponding first fuel of moment of torsion and the distributive value of the second fuel before described compensation；
S26：A kind of distributive value sum compensating distributive value and a kind of described fuel of described fuel be a kind of described fuel
Whole distributive value.
3. the dual fuel engine active damping method for vehicle according to claim 2 is it is characterised in that described
S22 comprises the following steps：
S221：Judge the described maximum size compensating moment of torsion compensating moment of torsion and described dual fuel engine；
S222：If described compensation moment of torsion be more than or equal to described maximum compensate moment of torsion, described actual compensate moment of torsion be described
Large compensation moment of torsion；
S223：If described compensation moment of torsion is less than described maximum compensation moment of torsion, judge described compensation moment of torsion and described double fuel
The minimum size compensating moment of torsion of electromotor；
S224：If described compensation moment of torsion is more than or equal to described minimum compensation moment of torsion, the described actual moment of torsion that compensates is described benefit
Repay moment of torsion；
S225：If described compensation moment of torsion is less than described minimum compensation moment of torsion, the described actual moment of torsion that compensates is described minimum benefit
Repay moment of torsion.
4. the dual fuel engine active damping method for vehicle according to any one of claim 1-3, its feature
It is, for gasoline and another is diesel oil for one of described first fuel and described second fuel.
5. the dual fuel engine active damping method for vehicle according to claim 4 is it is characterised in that described one
Planting fuel is diesel oil, and the described final distributive value in described step S2 is the final main jet oil mass of described diesel oil.
6. the dual fuel engine active damping method for vehicle according to claim 5 is it is characterised in that described step
Rapid S2 comprises the following steps：
S21：According to the fluctuation of speed of described dual fuel engine, calculate the compensation moment of torsion of described dual fuel engine；
S22：The described moment of torsion that compensates is carried out obtaining the actual compensation of described dual fuel engine after maximum restriction and minimum limit
Moment of torsion；
S23：The described actual moment of torsion corresponding diesel oil main jet that compensates is found according to map and compensates distributive value；
S24：The described actual torque compensation that compensates is obtained moment of torsion after car load compensates in car load moment of torsion, after car load compensates, moment of torsion exists
Transmit and calculate the actual torque of described dual fuel engine in car load；
S25：Described actual torque with described actual compensate moment of torsion difference be described dual fuel engine compensation before moment of torsion, according to
Map finds the distributive value with moment of torsion corresponding diesel oil main jet oil mass, the pre- distributive value of diesel oil and gasoline before described compensation；
S26：Described diesel oil main jet compensates the final main jet oil mass that distributive value is described diesel oil with described diesel oil main jet oil mass sum.
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| FR3028626B1 (en) * | 2014-11-17 | 2016-12-23 | Peugeot Citroen Automobiles Sa | METHOD FOR CONTROLLING A TORQUE OF A MOTOR POWERTRAIN COMPRISING A THERMAL ENGINE |
| CN104595049B (en) * | 2014-11-27 | 2017-08-25 | 长城汽车股份有限公司 | Dual fuel engine transient torque compensation system, compensation method and vehicle |
| CN106704013A (en) * | 2015-11-13 | 2017-05-24 | 日立汽车系统株式会社 | ECU for motor vehicle engine |
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| JP2005201073A (en) * | 2004-01-13 | 2005-07-28 | Toyota Motor Corp | Controller of internal combustion engine |
| CN1654797A (en) * | 2004-02-09 | 2005-08-17 | 丰田自动车株式会社 | Control system for internal combustion engine |
| CN103758650A (en) * | 2013-12-04 | 2014-04-30 | 三一重机有限公司 | Fuel oil control method and fuel oil control device, and engineering plant |
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| JP4218496B2 (en) * | 2003-11-05 | 2009-02-04 | 株式会社デンソー | Injection quantity control device for internal combustion engine |
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| JP2005201073A (en) * | 2004-01-13 | 2005-07-28 | Toyota Motor Corp | Controller of internal combustion engine |
| CN1654797A (en) * | 2004-02-09 | 2005-08-17 | 丰田自动车株式会社 | Control system for internal combustion engine |
| CN103758650A (en) * | 2013-12-04 | 2014-04-30 | 三一重机有限公司 | Fuel oil control method and fuel oil control device, and engineering plant |
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