CN104481710A - Control method and control system of multi-fuel engine and vehicle - Google Patents
Control method and control system of multi-fuel engine and vehicle Download PDFInfo
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- CN104481710A CN104481710A CN201410603030.1A CN201410603030A CN104481710A CN 104481710 A CN104481710 A CN 104481710A CN 201410603030 A CN201410603030 A CN 201410603030A CN 104481710 A CN104481710 A CN 104481710A
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Abstract
The invention provides a control method and a control system of a multi-fuel engine and a vehicle. The multi-fuel engine comprises a first cylinder capable of combusting fuel oil to do work and a second cylinder capable of combusting an alcohol fuel to do work. The method comprises a step of feeding the fuel oil into the first cylinder in a low-temperature cold start mode to drive the first cylinder to work. According to the control method of the multi-fuel engine, the defect of difficulty in start due to low temperature of the alcohol fuel existing in the multi-fuel engine can be overcome.
Description
Technical field
The present invention relates to technical field of engines, particularly a kind of controlling method of multifuel engine, control system and vehicle.
Background technique
In recent years, along with Domestic Automotive Industry develops the sustainable growth with mean inhabitant income rapidly, automobile pollution increases year by year.The fuel of current automobile is mainly based on oil, and world petroleum resource reduces day by day, and the supply of motor fuel will be more and more nervous.Therefore, alternative fuel is used to be the important measures solving China's oil shortage of resources.In addition, the environmental pollution that motor petrol, diesel oil cause is also day by day serious, uses clean alternative fuel to be reduce the effective way of vehicle emission pollution.
In numerous clean alternative fuel, alcohol fuel due to wide material sources, antiknock quality good, close with oil-fired physicochemical property, thus receive much concern, data shows, adopt the Aalcohols fuels such as ethanol can reduce at most the HC discharge amount of 40%, it plays immeasurable effect to the energy-saving and emission-reduction of motor.
In motor of the prior art, the solution that the present situation for Aalcohols fuel low-temperature cool starting difficulty is not good, causes Aalcohols fuel to be restricted as single or dual-fuel application within the engine, applies not extensive.
Summary of the invention
In view of this, the present invention is intended to the controlling method proposing a kind of multifuel engine, can overcome the defect of the Aalcohols fuel low-temperature cool starting difficulty existed in multifuel engine.
For achieving the above object, technological scheme of the present invention is achieved in that
A kind of controlling method of multifuel engine, wherein, described multifuel engine comprise can non-combusted fuels acting the first cylinder and can burn Aalcohols fuel acting the second cylinder, described method makes fuel oil enter in described first cylinder under being included in low-temperature cool starting pattern, and makes described first cylinder working.
Further, described first cylinder is multiple and the sequence number sequence of acting sequence interval when all working according to each cylinder of described multifuel engine, described method makes fuel oil enter multiple described first cylinder under being included in low-temperature cool starting pattern, and makes multiple described first cylinder working.
Further, described method comprises: under low speed Smaller load pattern, make described Aalcohols fuel enter in described second cylinder, and only make described second cylinder working.
Further, described method comprises: under the large load pattern of low speed, make fuel oil enter in described first cylinder and described Aalcohols fuel is entered in described second cylinder, and making described first cylinder and described second cylinder working; Or described first cylinder can also burn described Aalcohols fuel, described method makes described Aalcohols fuel enter in described first cylinder and the second cylinder under being included in the large load pattern of low speed, and makes described first cylinder and described second cylinder working.
Relative to prior art, the controlling method of multifuel engine of the present invention has following advantage:
Controlling method due to multifuel engine of the present invention makes fuel oil enter in described first cylinder under low-temperature cool starting pattern, and make described first cylinder working, thus startup multifuel engine, that is, adopt fuel oil ato unit in low-temperature cool starting pattern, efficiently solve the problem of alcohols (such as ethanol) fuel cold start-up difficulty.
Another object of the present invention is to the control system proposing a kind of multifuel engine, so that the defect of the Aalcohols fuel low-temperature cool starting difficulty existed in multifuel engine can be overcome.
For achieving the above object, technological scheme of the present invention is achieved in that
A kind of control system of multifuel engine, wherein, described multifuel engine comprises for the first cylinder of non-combusted fuels acting and the second cylinder for Aalcohols fuel acting of burning, described control system comprises control module, and this control module is used under low-temperature cool starting pattern, making fuel oil enter in described first cylinder and making described first cylinder working.
Further, described first cylinder is multiple and the sequence number sequence of acting sequence interval when all working according to each cylinder of described multifuel engine, under described low-temperature cool starting pattern, described control module controls fuel oil and enters multiple described first cylinder, and makes multiple described first cylinder working.
Further, described control module also enters in described second cylinder for controlling described Aalcohols fuel under low speed Smaller load pattern, and only makes described second cylinder working.
Further, described control module also to enter in described first cylinder for controlling described fuel oil under the large load pattern of low speed and described Aalcohols fuel is entered in described second cylinder, and makes described first cylinder and described second cylinder working; Or described first cylinder can also burn described Aalcohols fuel, and described control module also enters in described first cylinder and the second cylinder for controlling described Aalcohols fuel under the large load pattern of low speed, and makes described first cylinder and described second cylinder working.
The Dominant Facies that the control system of described multifuel engine and the controlling method of above-mentioned multifuel engine have relative to prior art is same, does not repeat them here.
Another object of the present invention is to propose a kind of vehicle, can overcome the defect of the Aalcohols fuel low-temperature cool starting difficulty existed in multifuel engine.
For achieving the above object, technological scheme of the present invention is achieved in that
A kind of vehicle, be provided with multifuel engine, wherein, described vehicle is also provided with the control system according to the multifuel engine described in technique scheme.
Further, described multifuel engine comprise can non-combusted fuels acting the first cylinder and can burn Aalcohols fuel acting the second cylinder, the scope of the compression ratio of described first cylinder is between 9 to 12, and the scope of the compression ratio of described second cylinder is between 10 to 13.
The Dominant Facies that the controlling method of described vehicle and above-mentioned multifuel engine has relative to prior art is same, does not repeat them here.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the multifuel engine described in the first mode of execution of the present invention.
Fig. 2 is the schematic diagram of the multifuel engine described in the second mode of execution of the present invention.
Description of reference numerals:
1-fuel rail, 2-cylinder, 3-No. bis-cylinders, 4-No. tri-cylinders, 5-No. tetra-cylinders, 11-fuel oil enters pipeline, and 12-ethanol enters pipeline.
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
In the present invention, term " first ", " second " object only for describing, and instruction can not be interpreted as or imply its significance level or the implicit quantity indicating indicated technical characteristics.In addition, in describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
According to an aspect of the present invention, a kind of controlling method of multifuel engine is provided, wherein, multifuel engine comprise can non-combusted fuels acting the first cylinder and can burn Aalcohols fuel acting the second cylinder, method makes fuel oil enter in the first cylinder under being included in low-temperature cool starting pattern, and makes the first cylinder working.
As above, controlling method due to the multifuel engine in the present invention makes fuel oil enter in the first cylinder under low-temperature cool starting pattern, and make the first cylinder working, thus startup multifuel engine, that is, adopt fuel oil ato unit in low-temperature cool starting pattern, efficiently solve the problem of alcohols (such as ethanol) fuel cold start-up difficulty.Here fuel oil can refer to gasoline etc., and Aalcohols fuel can refer to ethanol etc., but the present invention is not limited thereto.
According to the preferred embodiment of the present invention, first cylinder is multiple and the sequence number sequence of acting sequence interval when all working according to each cylinder of multifuel engine, method makes fuel oil enter multiple first cylinder under being included in low-temperature cool starting pattern, and makes multiple first cylinder working.Here, for the ease of understanding, see schematic diagram Fig. 1 of the multifuel engine described in the first mode of execution of the present invention, suppose that this multifuel engine is four cylinder engine, four cylinders enter pipeline 11 and ethanol by fuel rail 1 and fuel oil and enter pipeline 12 and be connected, wherein a cylinder 2 and No. four cylinders 5 are the first cylinder, No. two cylinders 3 and No. three cylinders 4 are the second cylinder, thus pipeline 11 can be entered by fuel oil and provide fuel oil to a cylinder 2 and No. four cylinders 5, enter pipeline 12 by ethanol and provide ethanol to No. two cylinders 3 and No. three cylinders 4.Acting order---No. three cylinders 4---No. four cylinders 5---No. two cylinders 3 that are a cylinder 2 when each cylinder of this multifuel engine all works.Such setting, because be set up from the space cloth of the cylinder body of motor or all carried out consideration spaced apart acting order, so effectively can control the vibration & noise of multifuel engine, keeps the balance of whole motor.But; the present invention and be limited to above preferred implementation; such as make the first cylinder be one or for multiple and all work according to each cylinder of multifuel engine time acting order continuously the multiple sequence number sequence of sequence or interval be also fine, these schemes all will fall into protection scope of the present invention.In addition; although only there is an injection line respectively between the fuel rail 1 shown in figure and each cylinder of this multifuel engine; but this Fig. 1 is just for the object of signal; be not limited to the present invention; all have two (or more) injection line between multiple cylinders in each cylinder of two (or more) injection line, even fuel rail 1 and this multifuel engine be all fine so have between a cylinder in each cylinder of fuel rail 1 and this multifuel engine, this type of scheme all belongs to protection scope of the present invention.
In addition, in a preferred embodiment of the invention, described controlling method can also comprise: under low speed Smaller load pattern, Aalcohols fuel is entered in the second cylinder, and only make the second cylinder working.Owing to not being very high relatively to the power demand of motor under low speed Smaller load pattern, so only enable the second cylinder working reduce car load emission level while meeting engine power demand.
In addition, more preferably, described controlling method can also comprise: under the large load pattern of low speed, make fuel oil enter in the first cylinder and Aalcohols fuel is entered in the second cylinder, and making the first cylinder and the second cylinder working; Or the first cylinder can also burn Aalcohols fuel, that is, see the schematic diagram 2 of the multifuel engine described in the second mode of execution of the present invention, all there are two injection line (one for injected fuel between each first cylinder (being a cylinder 2 and No. four cylinders 5 in figure) of now fuel rail 1 and this multifuel engine, another is for spraying Aalcohols fuel), so now, can make under low-temperature cool starting pattern in fuel oil first cylinder, and under the large load pattern of low speed, Aalcohols fuel be entered in the first cylinder.The method makes Aalcohols fuel enter in the first cylinder and the second cylinder under can also being included in the large load pattern of low speed, and makes the first cylinder and the second cylinder working.Due to now, the first cylinder and the second cylinder all work, so multifuel engine can be made to ensure, it has enough power, and now have at least one class cylinder adopt be Aalcohols fuel, so also the emission level of motor can be reduced.
According to another aspect of the present invention, a kind of control system of multifuel engine is also provided, wherein, multifuel engine comprises for the first cylinder of non-combusted fuels acting and the second cylinder for Aalcohols fuel acting of burning, control system comprises control module, and this control module is used under low-temperature cool starting pattern, making fuel oil enter in the first cylinder and making the first cylinder working.
Same, because the control module in the control system of the multifuel engine in the present invention can make fuel oil enter in the first cylinder under low-temperature cool starting pattern, and make the first cylinder working, thus startup multifuel engine, that is, adopt fuel oil ato unit in low-temperature cool starting pattern, efficiently solve the problem of alcohols (such as ethanol) fuel cold start-up difficulty.
In order to adapt with the controlling method of the multifuel engine described before, in the control system of multifuel engine of the present invention, first cylinder can be multiple and when all working according to each cylinder of multifuel engine acting sequence interval sequence number sequence, under low-temperature cool starting pattern, control module controls fuel oil and enters multiple first cylinder, and makes multiple first cylinder working.Control module can also be used for controlling Aalcohols fuel under low speed Smaller load pattern and enter in the second cylinder, and only makes the second cylinder working.Control module can also be used for controlling fuel oil under the large load pattern of low speed and to enter in the first cylinder and Aalcohols fuel is entered in the second cylinder, and makes the first cylinder and the second cylinder working; Or the first cylinder can also burn Aalcohols fuel, and control module can also be used for controlling Aalcohols fuel under the large load pattern of low speed and enter in the first cylinder and the second cylinder, and makes the first cylinder and the second cylinder working.
All can be embodied from the description of the above controlling method to multifuel engine about the embodiment of the control system of multifuel engine and benefit effect corresponding with it above, therefore be repeated no more here.
According to another aspect of the present invention, also provide a kind of vehicle, this vehicle set has multifuel engine, and wherein, vehicle is also provided with the control system according to the multifuel engine described in technique scheme, and this improves the overall performance of described vehicle undoubtedly.
In addition, multifuel engine can comprise can non-combusted fuels acting the first cylinder and can burn Aalcohols fuel acting the second cylinder, the scope of the compression ratio of the first cylinder is between 9 to 12, and the scope of the compression ratio of the second cylinder is between 10 to 13.The object of such setting is to enable the compression ratio of the first cylinder mate gasoline better, and the compression ratio of the second cylinder can mate Aalcohols fuel better, thus effectively can solve motor and easily produce the problem such as pinking, noise and power character, economic performance difference.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the controlling method of a multifuel engine, it is characterized in that, described multifuel engine comprise can non-combusted fuels acting the first cylinder and can burn Aalcohols fuel acting the second cylinder, described method makes fuel oil enter in described first cylinder under being included in low-temperature cool starting pattern, and makes described first cylinder working.
2. the controlling method of multifuel engine according to claim 1, it is characterized in that, described first cylinder is multiple and the sequence number sequence of acting sequence interval when all working according to each cylinder of described multifuel engine, described method makes fuel oil enter multiple described first cylinder under being included in low-temperature cool starting pattern, and makes multiple described first cylinder working.
3. the controlling method of multifuel engine according to claim 1 and 2, is characterized in that, described method comprises:
Under low speed Smaller load pattern, make described Aalcohols fuel enter in described second cylinder, and only make described second cylinder working.
4. the controlling method of multifuel engine according to claim 1 and 2, is characterized in that, described method comprises:
Under the large load pattern of low speed, make fuel oil enter in described first cylinder and described Aalcohols fuel is entered in described second cylinder, and making described first cylinder and described second cylinder working; Or
Described first cylinder can also burn described Aalcohols fuel, and described method makes described Aalcohols fuel enter in described first cylinder and the second cylinder under being included in the large load pattern of low speed, and makes described first cylinder and described second cylinder working.
5. the control system of a multifuel engine, it is characterized in that, described multifuel engine comprises for the first cylinder of non-combusted fuels acting and the second cylinder for Aalcohols fuel acting of burning, described control system comprises control module, and this control module is used under low-temperature cool starting pattern, making fuel oil enter in described first cylinder and making described first cylinder working.
6. the control system of multifuel engine according to claim 5, it is characterized in that, described first cylinder is multiple and the sequence number sequence of acting sequence interval when all working according to each cylinder of described multifuel engine, under described low-temperature cool starting pattern, described control module controls fuel oil and enters multiple described first cylinder, and makes multiple described first cylinder working.
7. the control system of the multifuel engine according to claim 5 or 6, is characterized in that, described control module also enters in described second cylinder for controlling described Aalcohols fuel under low speed Smaller load pattern, and only makes described second cylinder working.
8. the control system of the multifuel engine according to claim 5 or 6, is characterized in that,
Described control module also to enter in described first cylinder for controlling described fuel oil under the large load pattern of low speed and described Aalcohols fuel is entered in described second cylinder, and makes described first cylinder and described second cylinder working;
Or described first cylinder can also burn described Aalcohols fuel, and described control module also enters in described first cylinder and the second cylinder for controlling described Aalcohols fuel under the large load pattern of low speed, and makes described first cylinder and described second cylinder working.
9. a vehicle, is provided with multifuel engine, it is characterized in that, described vehicle is also provided with the control system according to the multifuel engine in claim 5 to 8 described in any one.
10. vehicle according to claim 9, it is characterized in that, described multifuel engine comprise can non-combusted fuels acting the first cylinder and can burn Aalcohols fuel acting the second cylinder, the scope of the compression ratio of described first cylinder is between 9 to 12, and the scope of the compression ratio of described second cylinder is between 10 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410603030.1A CN104481710B (en) | 2014-10-30 | The control method of multifuel engine, control system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410603030.1A CN104481710B (en) | 2014-10-30 | The control method of multifuel engine, control system and vehicle |
Publications (2)
| Publication Number | Publication Date |
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| CN104481710A true CN104481710A (en) | 2015-04-01 |
| CN104481710B CN104481710B (en) | 2017-01-04 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03124929A (en) * | 1989-10-06 | 1991-05-28 | Toyota Motor Corp | Fuel injection control device of alcohol-mixed fuel vehicle |
| CN2911208Y (en) * | 2005-10-31 | 2007-06-13 | 王和平 | I.C.engine of realizing double jetting of alcohol fuel and fuel |
| NL2001345C2 (en) * | 2008-03-03 | 2009-09-07 | Vialle Alternative Fuel System | Fuel supply arrangement for combustion engine of vehicle with direct injection, has control valve which is mounted across non-return valve provided in the petrol fuel line |
| CN103615345A (en) * | 2013-12-10 | 2014-03-05 | 安徽江淮汽车股份有限公司 | Cold start system and start method for flexible fuel vehicle |
| CN104011350A (en) * | 2011-11-29 | 2014-08-27 | 通用电气公司 | An engine utilizing a plurality of fuels, and a related method thereof |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03124929A (en) * | 1989-10-06 | 1991-05-28 | Toyota Motor Corp | Fuel injection control device of alcohol-mixed fuel vehicle |
| CN2911208Y (en) * | 2005-10-31 | 2007-06-13 | 王和平 | I.C.engine of realizing double jetting of alcohol fuel and fuel |
| NL2001345C2 (en) * | 2008-03-03 | 2009-09-07 | Vialle Alternative Fuel System | Fuel supply arrangement for combustion engine of vehicle with direct injection, has control valve which is mounted across non-return valve provided in the petrol fuel line |
| CN104011350A (en) * | 2011-11-29 | 2014-08-27 | 通用电气公司 | An engine utilizing a plurality of fuels, and a related method thereof |
| CN103615345A (en) * | 2013-12-10 | 2014-03-05 | 安徽江淮汽车股份有限公司 | Cold start system and start method for flexible fuel vehicle |
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