CN105736163A - Method and system for determining different biodiesel proportions - Google Patents
Method and system for determining different biodiesel proportions Download PDFInfo
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- CN105736163A CN105736163A CN201410742887.1A CN201410742887A CN105736163A CN 105736163 A CN105736163 A CN 105736163A CN 201410742887 A CN201410742887 A CN 201410742887A CN 105736163 A CN105736163 A CN 105736163A
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Abstract
The invention discloses a method and system for determining different biodiesel proportions. The method mainly comprises the steps that a nitrogen oxide sensor is disposed on a vehicle which is equipped with a vehicle-mounted computer, and the sensor is used to detect multiple different types of biodiesel, can obtain relevant information and can provide the information to the vehicle-mounted computer for processing; when the vehicle does not leave a factory, the nitrogen oxide sensor detects the multiple different types of biodiesel, then the vehicle-mounted computer can pre-construct and store over one piece of proportional relation data through engine tests and according to different nitrogen oxide proportions, and a strategy for engine oil spraying is adjusted according to an engine state and the type of biodiesel when the vehicle leaves the factory and the different types of biodiesel are used; and by the system, the different biodiesel proportions can be determined, and the engine oil spray strategy can be adjusted correspondingly, so that engine performance can be improved, and purposes of energy saving and carbon reduction can be reached.
Description
Technical field
The present invention relates to one and judge bavin oil treatment process and system, particularly relate to a kind of processing method judging different biodiesel ratio and system.
Background technology
Along with the progress of science and technology, Transportation Industry is flourish, is no matter government unit or private enterprise does one's utmost on the correlational study of vehicle power, and usual development projects includes: one, carbon reduction, i.e. low stain and low energy consumption；Two, expansion new forms of energy and energy-conservation science and technology.Project with current carbon reduction, the vehicle technology that existing development is quite ripe, and the advantage that the use of electric motor car has low stain and low energy consumption really, but vehicle technology is still to some extent unfortunately, it is limited to performance of generator module not as general engine, and the battery technology of the electric motor car problem such as make its flying power limited；And in the project of growth and expansion new forms of energy and energy-conservation science and technology, more can meet the demand of engine performance and carbon reduction with current technology.
nullThe correlational study of the existing control technology using biodiesel for engine at present，The physics of biodiesel and chemical property and fossil diesel fuel are very close，And use directly can be mixed with fossil diesel fuel，The ratio of its mixing can from B2 biodiesel (adding 2% biodiesel) or even B100 biodiesel，With biodiesel compared to fossil diesel fuel，It is higher that biodiesel has oxygen content、The characteristics such as calorific value is relatively low，If at high proportion during application mixed with fossil diesel fuel，Engine performance can be affected because of above-mentioned characteristic，But it is also more few then to discharge pollutants when biodiesel ratio is more high，Owing to biodiesel has the benefit subtracting carbon with Distributed Power Resource，Trend and trend that the raw mass-energy in the whole world at present promotes are become，And during Countries promotion biodiesel policy，The not Compulsory Feature vehicle unified biodiesel using same ratio comprehensively，Therefore market be likely to sell the biodiesel of different mixing proportion simultaneously.
With existing judgement biodiesel ratio and carry out engine control adjustment technology and include: 1. utilizing cylinder pressure force value to be analyzed, this technology must use cylinder pressure sensor to measure, and it is expensive；2. use distributive value to calculate, the all first preset value according to moment of torsion rotating speed map (Torque-SpeedMap) of the distributive value adjustment of general diesel motor is controlled, again with its distributive value for corrected parameter, but actually its to control logic sufficiently complex, the higher not easy care again of manufacturing cost；3. calculate measuring relative permittivity value, but the special dielectric constant sensor of vehicle that still cost free is low in the market, usefulness is good；
And for example Chinese patent CN102787924 " method based on the biodiesel hybrid detection that fuel post injection amount is assessed " (hereinafter referred to as front case), it discloses a kind of method of mixed proportion of bio-fuel detected in internal combustion engine, the method comprises the following steps: set at least two post injection fuel quantity reference value, to be respectively used to known biodiesel compound percentages ratio；The value of assessment post injection fuel quantity；The reference value of the value of described post injection fuel quantity and described at least two post injection fuel quantity is compared；It is used in the value of post injection fuel quantity and by biodiesel relative to the correlation one group predetermined between the biodiesel mixed proportion expressed by the percentage ratio of petrifaction diesel, to determine biodiesel mixed proportion.
From above-mentioned prior art, when biodiesel mixes application with fossil diesel fuel, engine performance can be affected because of biodiesel characteristic, the difference of ratio, such as: when assessing stable state (Steady-State) performance of B2 biodiesel engine, B100 biodiesel engine, if all using same biodiesel fuel, the engine using B100 biodiesel can be made when rotating speed on average about 1800rpm, and its horsepower declines about 6.9% on the contrary.Therefore there is the problem that the more high then engine performance of biodiesel ratio declines in prior art；Though and front case utilize engine after distributive value to judge biodiesel ratio, and also can be different to judge biodiesel ratio according to discharge rate after fuel characteristic difference, but front case is to obtain accurate distributive value to carry out the logic control of complexity, just precisely extrapolated correct biodiesel ratio so that the manufacturing cost height of this mode not easy care again；Therefore, prior art needs to be proposed the necessity of more preferably evolutionary approach really.
Summary of the invention
Because above-mentioned the deficiencies in the prior art, present invention is primarily aimed at and a kind of processing method judging different biodiesel ratio and system are provided, in vehicle computer, the sample data of various biodiesel ratio is set up by having high efficiency mode, vehicle after dispatching from the factory only the is needed strategy automatically adjusting engine oil spout that the relevant readings according to biodiesel just can be instant, promotes engine performance, carbon reduction with low cost, high efficiency mode.
The technical way taked for reaching above-mentioned purpose is in that to provide a kind of processing method judging different biodiesel ratio, connects mainly through a vehicle computer and a nitrogen oxides sensor, and is performed the following step by this vehicle computer:
When performing an operator scheme:
According to different nitrogen oxides ratios, pre-build more than one proportionate relationship data；
When performing a driving mode:
Obtain more than one status information and a nitrogen oxides information；
According to the proportionate relationship of this status information and this nitrogen oxides information, produce a concentration information；
The proportionate relationship data utilizing this concentration information and pre-build are compared, and perform an adjustment engine Injection strategy according to comparison result.
nullIn preceding method，It is connect this nitrogen oxides sensor with this vehicle computer，This nitrogen oxides sensor is in order to detect multiple different biodiesel to obtain relevant information，When vehicle implement either operational mode before not dispatching from the factory，This vehicle computer is made different nitrogen oxides ratios to be detected according to nitrogen oxides sensor，Pre-build more than one proportionate relationship data，Therefore after vehicle release，In time using different biodiesels，This vehicle computer is then according to instant this status information obtained、The proportionate relationship of this nitrogen oxides information and produce corresponding concentration information，And utilize the proportionate relationship data that this concentration information and vehicle pre-build before not dispatching from the factory to compare，This adjustment engine Injection strategy is performed further in accordance with comparison result，With low cost、High efficiency mode reaches to promote that engine performance is double again can save energy the purpose subtracting carbon.
The another technical way taked for reaching above-mentioned purpose is in that to provide a kind of process system judging different biodiesel ratio to include:
One nitrogen oxides sensor, in order to detect biodiesel and to obtain a nitrogen oxides information；
One vehicle computer, is connected with this nitrogen oxides sensor, and this vehicle computer has the more than one proportionate relationship data pre-build, these proportionate relationship data include most the biodiesel information of different proportion, nitrogen oxides information；
Wherein, this vehicle computer receives this nitrogen oxides information by this nitrogen oxides sensor and this vehicle computer receives more than one status information, and this status information and this nitrogen oxides information are carried out a calculating formula with proportionate relationship, to produce a concentration information, compared with the proportionate relationship data pre-build according to this concentration information by this vehicle computer, to judge the ratio of biodiesel, and perform an adjustment engine Injection strategy according to judged result.
nullFrom above-mentioned structure，The present invention judges that the process system of different biodiesel ratio is mainly detected biodiesel by this nitrogen oxides sensor and obtains relevant nitrogen oxides information，And those information are supplied to this vehicle computer process，And by this nitrogen oxides sensor, multiple different biodiesel is detected before vehicle not yet dispatches from the factory，Vehicle computer is tested by engine and different nitrogen oxides ratios is built in advance and stores proportionate relationship data，These proportionate relationship data include the biodiesel information of most different proportion、Nitrogen oxides information，When vehicle release and when using different biodiesels，This vehicle computer also receives the status information of vehicle and receives its nitrogen oxides information by this nitrogen oxides sensor，And this status information and this nitrogen oxides information are carried out the calculating formula with proportionate relationship to produce this concentration information，Compared with the proportionate relationship data pre-build according to this concentration information by this vehicle computer again，To judge the ratio of biodiesel，And perform to adjust engine Injection strategy according to judged result，Therefore with low cost、High efficiency mode can reach to promote that engine performance is double again can save energy the purpose subtracting carbon.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
The system block diagram of Fig. 1 a preferred embodiment of the present invention；
The application state schematic diagram of Fig. 2 a preferred embodiment of the present invention；
The proportionate relationship data and curves figure of Fig. 3 a preferred embodiment of the present invention；
The process flow figure of Fig. 4 a preferred embodiment of the present invention.
Wherein, accompanying drawing labelling
10 vehicle computer 11 processors
12 mnemon 13 signal input ports
20 nitrogen oxides sensors
30 engine modules
40 Throttle Opening Control modules
50,60 biodiesels
Detailed description of the invention
A preferred embodiment of the process system of different biodiesel ratio is judged about the present invention, refer to shown in Fig. 1, it includes vehicle computer 10, nitrogen oxides sensor 20, this vehicle computer 10 is connected with this nitrogen oxides sensor 20, and this nitrogen oxides sensor 20 is in order to detect the biodiesel of different proportion and to obtain a nitrogen oxides information respectively；Described nitrogen oxides (NitrogenOxides, NOx) refers to the compound two kinds elementary composition by nitrogen, oxygen.
In the present embodiment, this vehicle computer 10 includes processor 11, mnemon 12 and a signal input port 13, this processor 11 is connected with this mnemon 12, this signal input port 13 respectively, this signal input port 13 is connected with this nitrogen oxides sensor 20, this nitrogen oxides sensor 20 detects different ratio biodiesels, and the signal input port 13 that the nitrogen oxides information of acquirement is passed through this vehicle computer 10 is sent to this processor 11 and processes.
The processor 11 of this vehicle computer 10 detects different nitrogen oxides information according to receiving this nitrogen oxides sensor 20, pre-build more than one proportionate relationship data, and these proportionate relationship data are stored in the mnemon 12 of this vehicle computer 10, these proportionate relationship data include most the biodiesel information of different proportion, nitrogen oxides information；
After the proportionate relationship data pre-build have been stored in this vehicle computer 10, if re-using the biodiesel of different proportion, only need to be obtained more than one status information by the processor 11 of this vehicle computer 10 and obtain a nitrogen oxides information by this nitrogen oxides sensor 20, again this status information and this nitrogen oxides information are carried out a calculating formula with proportionate relationship, a concentration information is produced according to the proportionate relationship of this status information and this nitrogen oxides information, this processor 11 is compared with the proportionate relationship data pre-build according to this concentration information, immediately to judge the ratio of biodiesel, and adjust engine Injection strategy according to the efficient execution one of judged result, therefore with low cost, high efficiency mode can reach to promote engine performance and have again the purpose of carbon reduction concurrently.
nullFor the concrete application mode of this preferred embodiment is described，Refer to shown in Fig. 2，Including depot's stage、One vehicle release stage，This depot refers to that a vehicle is before not yet dispatching from the factory the stage，An operator scheme test (as engine is tested) is carried out for each project，This vehicle release stage refers to that this vehicle is complete after tested，A driving mode (as driven on Ordinary Rd and refueling from walking to gas station) can be performed by common people，In the present embodiment，This vehicle computer 10 and this nitrogen oxides sensor 20 are arranged on this vehicle，This vehicle has an engine modules 30、One Throttle Opening Control module 40，This vehicle computer 10 respectively with this engine modules 30、This Throttle Opening Control module 40 connects，This vehicle computer 10 can receive the status information of this engine modules 30 and the status information of this Throttle Opening Control module 40 respectively，The status information of this engine modules 30 includes a rotary speed information、One load information，The status information of this Throttle Opening Control module 40 includes a throttle opening information；
When not yet dispatching from the factory when this vehicle and the stage be operated pattern in depot, the biodiesel 50 of multiple different proportion is detected by this vehicle computer 10 by this nitrogen oxides sensor 20, in the present embodiment, the biodiesel 50 of multiple different proportion includes D100 (B0), B20, B40, B60, B80, B100, the processor 11 making vehicle computer 10 can pass through engine speed, during the test such as accelerator open degree and load and different nitrogen oxides ratios pre-build aforementioned proportion relation data and are stored in the mnemon 12 of this vehicle computer 10, these proportionate relationship data include the biodiesel information of most different proportion, nitrogen oxides information；
nullWhen this vehicle has been in the stage of dispatching from the factory and is performed driving mode by driver，Vehicle is travelled to gas station and after adding the biodiesel 60 of a certain ratio，Vehicle launch when travelling，This vehicle computer 10 then receives the status information of this vehicle and receives its nitrogen oxides information by this nitrogen oxides sensor 20，And capture this status information (such as rotating speed and load) and this nitrogen oxides information and carry out the calculating formula with proportionate relationship to produce this concentration information，In the present embodiment，Many nitrogen oxides information under this vehicle computer 10 fechtable dead load or accelerator open degree and rotating speed are averaged (such as 10 NOx nitrogen oxides information)，Compared with the proportionate relationship data pre-build according to this concentration information by the processor 11 of this vehicle computer 10 again，Through bringing the above-mentioned calculating formula with proportionate relationship into judge the ratio of biodiesel，And by the processor 11 of this vehicle computer 10, this engine modules 30 is sent a fuel injector control signal according to judged result，(as adjusted injection timing and distributive value) is adjusted with enforcement engine fuel injection control strategy，And further by the processor 11 of this vehicle computer 10, this engine modules 30 is persistently sent an operating control signal，To make engine reach optimized running effect，When after flame-out closedown engine and reply genuine set，Therefore there is low cost、High efficiency advantage and can reaching promotes that engine performance is double again can save energy the purpose subtracting carbon.
nullMode is set up for what illustrate proportionate relationship data and calculating formula，Refer to shown in Fig. 3，Including a trunnion axis and a vertical axis，This trunnion axis is the biodiesel 50 of above-mentioned multiple different proportion，Its sequential is B100、B80、B60、B40、B20、B0，This vertical axis is a nitrogen oxide NOx total amount (0～700ppm)，Tested by engine and at fixed rotating speed、The proportionate relationship data of different proportion bavin and NOx are set up under accelerator open degree or load，As shown in Figure 3，When this vehicle is in depot's stage，The engine speed that this vehicle computer 10 the most often operates according to this engine modules 30 sets up proportionate relationship data，Such as most rotary speed informations include 1500rpm、1800rpm、2100rpm，This throttle opening information is 50%～60%，When this vehicle is in the stage of dispatching from the factory，And this vehicle computer 10 to obtain this rotary speed information be 1500rpm、This throttle opening information is under 60%，Take many nitrogen oxides information respectively to be averaged，This calculating formula with proportionate relationship is carried out again by the processor 11 of this vehicle computer 10，To produce concentration information，This concentration information is compared with the proportionate relationship data pre-build，Bring the above-mentioned calculating formula with proportionate relationship into judge the ratio of biodiesel，And perform an adjustment engine Injection strategy according to judged result.
In the present embodiment, being carried out a calculating formula with proportionate relationship according to above-mentioned status information, this nitrogen oxides information, this calculating formula can be a linear function y=Α x+b；Wherein, y is the concentration information of nitrogen oxide NOx, and x is this throttle opening information, is 100% when this rotary speed information is 2600rpm, throttle opening information, and A is 8.7904, b is 155.4.This calculating formula can be further a polynomial function y=Ax2+bx+c；Wherein, y is the concentration information of nitrogen oxide NOx, and x is this throttle opening information.Being 60% when this rotary speed information is 1500rpm, throttle opening information, A is 1.75, b is-47.279, c is 830.6；Being 60% when this rotary speed information is 1800rpm, throttle opening information, A is 8.4643, b is-92.336, c is 702.8；Being 60% when this rotary speed information is 2100rpm, throttle opening information, A is 9.4643, b is-99.307, c is 720.2.
The application mode of foundation the invention described above preferred embodiment and illustration further provide for the processing method of a judgement difference biodiesel ratio, as shown in Figure 4, it is connected with this nitrogen oxides sensor 20 mainly by this vehicle computer 10, and is performed the following step by this vehicle computer 10:
When vehicle performs an operator scheme (S41) stage in a depot:
Detect different nitrogen oxides ratios according to this nitrogen oxides sensor 20, pre-build more than one proportionate relationship data (S42)；
When vehicle performs a driving mode (S51) in the vehicle release stage:
When vehicle launch travels, this vehicle computer 10 obtains more than one status information by its engine modules 30, Throttle Opening Control module 40, and obtains a nitrogen oxides information (S52) by this nitrogen oxides sensor 20；
Proportionate relationship according to this status information and this nitrogen oxides information, produce a concentration information (S53), being carried out a calculating formula with proportionate relationship according to this status information, this nitrogen oxides information, this calculating formula can be an a linear function y=Α x+b or polynomial function y=Ax2+bx+c；Wherein, y is the concentration information of nitrogen oxide NOx, and x is this throttle opening information；
The proportionate relationship data utilizing this concentration information and pre-build are compared (S54), bring the above-mentioned calculating formula with proportionate relationship into judge the ratio of biodiesel, and according to comparison result, above-mentioned engine modules 30 is sent a fuel injector control signal to perform adjustment engine Injection strategy (S55)；
By the processor 11 of this vehicle computer 10, this engine modules 30 is persistently sent an operating control signal, to make engine operate (S56) with optimization；
After flame-out (S57) closes engine and reply genuine and set, and return to " when performing a driving mode (S51) " step.
By this vehicle computer 10, the present invention judges that different biodiesel ratio can adjust engine Injection strategy accordingly, corresponding concentration information can be produced according to the instant status information of acquisition, the proportionate relationship of nitrogen oxides information after vehicle release, and utilize the proportionate relationship data that this concentration information and vehicle pre-build before not dispatching from the factory to compare, perform this adjustment engine Injection strategy further in accordance with comparison result, and by this vehicle computer 10, this engine modules 30 is persistently sent operating control signal and make engine operate with optimization.
Certainly; the present invention also can have other various embodiments; when without departing substantially from present invention spirit and essence thereof; those of ordinary skill in the art are when can make various corresponding change and deformation according to the present invention, but these change accordingly and deformation all should belong to the scope of the claims appended by the present invention.
Claims (10)
1. judge a processing method for different biodiesel ratio, connect mainly through a vehicle computer and a nitrogen oxides sensor, it is characterised in that performed the following step by this vehicle computer:
When performing an operator scheme:
According to different nitrogen oxides ratios, pre-build more than one proportionate relationship data；
When performing a driving mode:
Obtain more than one status information and a nitrogen oxides information；
According to the proportionate relationship of this status information and this nitrogen oxides information, produce a concentration information；
The proportionate relationship data utilizing this concentration information and pre-build are compared, and perform an adjustment engine Injection strategy according to comparison result.
2. the processing method judging different biodiesel ratio according to claim 1, it is characterised in that when the method performs to the above-mentioned proportionate relationship step according to this status information and this nitrogen oxides information, the method more comprises the following steps:
A calculating formula with proportionate relationship is carried out according to this status information, this nitrogen oxides information.
3. the processing method judging different biodiesel ratio according to claim 2, it is characterised in that this calculating formula is a linear function or a polynomial function.
4. the processing method judging different biodiesel ratio according to claim 3, it is characterised in that this linear function is y=Α x+b, this polynomial function y=Ax2+bx+c；Wherein, y is the concentration information of nitrogen oxide NOx, and x is this throttle opening information.
5. the processing method judging different biodiesel ratio according to claim 4, it is characterized in that, when the method performs to the above-mentioned proportionate relationship data utilizing this concentration information and pre-build to compare, performing an adjustment engine Injection strategy step according to comparison result, the method more comprises the following steps:
Bring the above-mentioned calculating formula with proportionate relationship into judge the ratio of biodiesel, and according to comparison result, one engine modules is sent a fuel injector control signal and adjust engine Injection strategy to perform one.
6. the processing method judging different biodiesel ratio as claimed in any of claims 1 to 5, it is characterised in that when the method performs a driving mode, farther include the following step:
Continue an engine modules to send an operating control signal, to make engine operate with optimization；
After flame-out, return to when performing a traveling mode step.
7. the process system judging different biodiesel ratio, it is characterised in that including:
One nitrogen oxides sensor, in order to detect biodiesel and to obtain a nitrogen oxides information；
One vehicle computer, is connected with this nitrogen oxides sensor, and this vehicle computer has the more than one proportionate relationship data pre-build, these proportionate relationship data include most the biodiesel information of different proportion, nitrogen oxides information；
Wherein, this vehicle computer receives this nitrogen oxides information by this nitrogen oxides sensor and this vehicle computer receives more than one status information, and this status information and this nitrogen oxides information are carried out a calculating formula with proportionate relationship, to produce a concentration information, compared with the proportionate relationship data pre-build according to this concentration information by this vehicle computer, to judge the ratio of biodiesel, and perform an adjustment engine Injection strategy according to judged result.
8. the process system judging different biodiesel ratio according to claim 7, it is characterized in that, this vehicle computer includes a processor, a mnemon and a signal input port, this processor system is connected with this mnemon, this signal input port respectively, and this signal input port is connected with this nitrogen oxides sensor.
9. the process system judging different biodiesel ratio according to claim 8, it is characterized in that, this vehicle computer and this nitrogen oxides sensor are arranged on a vehicle, this vehicle has an engine modules, a Throttle Opening Control module, this vehicle computer is connected with this engine modules, this Throttle Opening Control module respectively, and this vehicle computer receives the status information of this engine modules and the status information of this Throttle Opening Control module respectively.
10. the process system judging different biodiesel ratio according to claim 9, it is characterised in that the status information of this engine modules includes a rotary speed information, a load information, and the status information of this Throttle Opening Control module includes a throttle opening information.
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| US20090165442A1 (en) * | 2005-12-08 | 2009-07-02 | Isuzu Motors Limited Of Tokyo | Method for Controlling Exhaust Gas Purification System |
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| CN103899429A (en) * | 2012-12-29 | 2014-07-02 | 比亚迪股份有限公司 | Automobile emission matching control system and control method thereof |
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| US20090165442A1 (en) * | 2005-12-08 | 2009-07-02 | Isuzu Motors Limited Of Tokyo | Method for Controlling Exhaust Gas Purification System |
| JP2008138619A (en) * | 2006-12-04 | 2008-06-19 | Mitsubishi Fuso Truck & Bus Corp | Exhaust emission control device of internal combustion engine |
| CN102337978A (en) * | 2010-07-20 | 2012-02-01 | 福特环球技术公司 | Compensation for oxygenated fuel use in a diesel engine |
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