CN104033252A - Method for increasing low-temperature volatility of ethanol fuel and cold starting system for ethanol-fuel cars - Google Patents
Method for increasing low-temperature volatility of ethanol fuel and cold starting system for ethanol-fuel cars Download PDFInfo
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- CN104033252A CN104033252A CN201410279656.1A CN201410279656A CN104033252A CN 104033252 A CN104033252 A CN 104033252A CN 201410279656 A CN201410279656 A CN 201410279656A CN 104033252 A CN104033252 A CN 104033252A
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- temperature
- threshold value
- cold start
- intake
- intake temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention provides a method for increasing low-temperature volatility of ethanol fuel and a cold starting system for ethanol-fuel cars. The method includes: collecting the gas inlet temperature acquired by a gas inlet temperature sensor; judging whether the gas inlet temperature is lower than a gas inlet temperature threshold or not; if so, closing an electronic throttle valve; collecting the engine revolution acquired by an engine rotation speed sensor; gradually increasing the openness of the electronic throttle valve when the engine revolution reaches the preset revolution. The method for increasing low-temperature volatility of the ethanol fuel and the cold starting system for the ethanol-fuel cars have the advantages that the pressure of an gas inlet manifold is lowered by closing the electronic throttle valve, the volatility of the ethanol fuel can be increased by lowering the pressure of the gas inlet manifold, energy saving is achieved, and fast cold starting of the ethanol-fuel cars is achieved.
Description
Technical field
The present invention relates to cold-starting automobile field, particularly a kind of raising alcohol fuel low temperature volatility method and alcohol fuel automobile cold starting system.
Background technique
Alcohol fuel can be obtained by Raw material processings such as grain and various vegetable fibers, is a kind of new cleaning fuel, and alcohol fuel refers to and in gasoline component, adds by volume a certain proportion of alcohol fuel, and a kind of fuel that is mixed and is formed by special process.Utilize alcohol fuel to replace traditional fuel can reduce the dependence to non-renewable resources such as oil, and have the following advantages: products of combustion is water and carbon dioxide, and environmental-protecting performance is high; Octane value is high, and the capability of antidetonance is good; Oxygen content is high, is conducive to abundant burning; Accumulating is carried convenient.
The volatility of alcohol fuel in alcohol fuel when low temperature can sharply decline, cause alcohol fuel to be difficult to smooth atomization and form stable mixed gas with air, the latent heat of vaporization of alcohol fuel is large compared with gasoline simultaneously, in vaporescence when engine start, to absorb amount of heat, thereby cause using the engine cold starting difficulty of alcohol fuel.Engine cold starting problem is except adopting the solution of drop tank cold-start system at present, the general object that adopts engine heating system to realize cold starting, heater in traditional engine heating system utilizes the air in the electric energy heating air inlet manifold of storage battery, or the fuel in heated fuel oil guide rail, to improve oil sprayer ejection fuel atomizing effect, reach the object of smooth ignition under low temperature.Due to the air of needs heating or the amount of fuel large, storage battery need to consume a large amount of electric energy and supply with heater, easily causes accumulator feeding.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of can effectively avoid accumulator feeding, improves alcohol fuel low temperature volatility method, and alcohol fuel automobile cold starting system.
For solving the problems of the technologies described above, first the present invention provides a kind of raising alcohol fuel low temperature volatility method, and it comprises:
Gather the intake temperature that intake air temperature sensor records;
Judge that whether described intake temperature is lower than cold start-up intake temperature threshold value;
When described intake temperature is during lower than described cold start-up intake temperature threshold value, close electronic throttle;
Gather the engine revolution that engine rotation speed sensor records;
When described engine revolution reaches default revolution, increase gradually the aperture of described electronic throttle.
Preferably, described cold start-up intake temperature threshold value is 17 ℃.
Preferably, the described aperture that increases gradually described electronic throttle specifically comprises:
By accelerator pedal position, obtain the Engine torque T needing;
By the Engine torque T of described needs, obtain the fuel injection quantity F needing;
By the fuel injection quantity F of described needs, obtain the air inlet quality m needing
1;
Calculating standard air inlet quality m
0=(P
0* V)/(R * T
0), wherein V is cylinder volume, P
0for standard atmospheric pressure, R is gas constant, T
0for preset temperature;
Gather MAT T
1, according to the air inlet quality m of described needs
1with described MAT T
1, calculate the air-distributor pressure P needing
1=[(m
1* T
1)/(m
0* T
0)] * P
0;
Air-distributor pressure P by described needs
1, the aperture of electron gain closure.
More preferably, described preset temperature is 20 ℃.
Preferably, described method also comprises:
Gather the coolant temperature that cooling-water temperature transmitter records;
Judge that described coolant temperature is whether lower than cold start-up coolant temperature threshold value and judge that whether described intake temperature is lower than cold start-up intake temperature threshold value;
When described coolant temperature during lower than described cold start-up intake temperature threshold value, is closed electronic throttle lower than described cold start-up coolant temperature threshold value and described intake temperature.
More preferably, described cold start-up coolant temperature threshold value is 27 ℃.
The present invention also provides a kind of alcohol fuel automobile cold starting system, and it comprises:
Storage battery;
Intake air temperature sensor;
Electronic throttle;
Engine rotation speed sensor;
Engine control module, for gathering the intake temperature that described intake air temperature sensor records, and judge that whether described intake temperature is lower than cold start-up intake temperature threshold value, when described intake temperature is during lower than described cold start-up intake temperature threshold value, close described electronic throttle, and gather the engine revolution that engine rotation speed sensor records, when described engine revolution reaches default revolution, increase gradually the aperture of described electronic throttle.
Preferably, described cold start-up intake temperature threshold value is 17 ℃.
Preferably, also comprise cooling-water temperature transmitter, described engine control module gathers the coolant temperature that described cooling-water temperature transmitter records, and judge that described coolant temperature is whether lower than cold start-up coolant temperature threshold value and judge that whether described intake temperature is lower than cold start-up intake temperature threshold value, when described coolant temperature during lower than described cold start-up intake temperature threshold value, is closed described electronic throttle lower than described cold start-up coolant temperature threshold value and described intake temperature.
More preferably, described cold start-up intake temperature threshold value is 17 ℃.
Raising alcohol fuel low temperature volatility method and alcohol fuel automobile cold starting system that the present invention proposes, by closing electronic throttle, reach the object that reduces air-distributor pressure, the decline of air-distributor pressure can improve the volatility of alcohol fuel, reaches energy-conservation and realizes rapidly the object of alcohol fuel cold-starting automobile.
Accompanying drawing explanation
Fig. 1 is a kind of flow chart that improves alcohol fuel low temperature volatility method the first mode of execution of the present invention;
Fig. 2 is a kind of flow chart that improves alcohol fuel low temperature volatility method the second mode of execution of the present invention;
Fig. 3 is a kind of alcohol fuel automobile cold starting system of the present invention embodiment's electrical structure schematic diagram.
In figure, indicate as follows:
Storage battery-1, intake air temperature sensor-2, cooling-water temperature transmitter-3, electronic throttle-4, engine rotation speed sensor-5, engine control module-6.
Embodiment
For above-mentioned purpose, the feature and advantage of invention can be become apparent more, below the specific embodiment of the present invention is described in detail.
A lot of details have been set forth in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here and implement, those skilled in the art can do similar popularization without prejudice to intension of the present invention in the situation that, so the present invention is not subject to the restriction of following public specific embodiment.
As shown in Figure 1, the invention provides a kind of raising alcohol fuel low temperature volatility method, it comprises:
Gather the intake temperature that intake air temperature sensor records;
Judge that whether described intake temperature is lower than cold start-up intake temperature threshold value, those skilled in the art can select applicable cold start-up air inlet threshold value flexibly, and conventional cold start-up air inlet threshold value can be-5 ℃～30 ℃, and preferably, cold start-up intake temperature threshold value is 17 ℃;
When described intake temperature is during lower than described cold start-up intake temperature threshold value, close electronic throttle, close after electronic throttle, the pressure drop in intake manifold, the volatility of alcohol fuel improves;
Gather the engine revolution that engine rotation speed sensor records, it should be apparent to those skilled in the art that, the collection of engine revolution can with intake temperature synchronous acquisition, or gather after closing electronic throttle, engine rotation speed sensor can record engine crankshaft winding number per minute (unit for rpm, r/min), (unit is for turning, r) also to record the number of turns that engine crankshaft turns;
When described engine revolution reaches default revolution, increase gradually the aperture of described electronic throttle, above-mentioned default revolution is relevant to size and the concrete structure of motor, can when demarcating motor, record by experiment, when engine revolution reaches default revolution, show that volatility that pressure in engine intake manifold has dropped to alcohol fuel reaches the requirement of cold start-up, now can open electronic throttle, to guarantee the normal operation of automobile.
The present invention, by closing electronic throttle, reaches the object that reduces air-distributor pressure, and the decline of air-distributor pressure can improve the volatility of alcohol fuel, thereby has guaranteed the volatility requirement of alcohol fuel under low temperature.
In order to reach better energy-conservation effect, optimize the use sense of alcohol fuel automobile, the aperture that increases gradually described electronic throttle in S5 specifically comprises:
By accelerator pedal position, the Engine torque T needing, those skilled in the art can easily know, the corresponding relation between Engine torque T and accelerator pedal position can obtain by tabling look-up;
By the Engine torque T of described needs, obtain the fuel injection quantity F needing, the fuel injection quantity F needing can be calculated by needs Engine torque T, or can draw by checking in;
By the fuel injection quantity F of described needs, obtain the air inlet quality m needing
1, the air inlet quality m needing
1can be calculated by the fuel injection quantity F of needs, or can draw by tabling look-up;
Calculating standard air inlet quality m
0=(P
0* V)/(R * T
0), wherein V is cylinder volume, P
0for standard atmospheric pressure, R is gas constant, T
0for preset temperature, above-mentioned P
0optional value 101.3, above-mentioned preset temperature can be 20 ℃～25 ℃, and preferably, described preset temperature is 20 ℃;
Gather MAT T
1, according to the air inlet quality m of described needs
1with described MAT T
1, calculate the air-distributor pressure P needing
1=[(m
1* T
1)/(m
0* T
0)] * P
0;
Air-distributor pressure P by described needs
1, the aperture of electron gain closure, those skilled in the art can easily know, air-distributor pressure P
1and the corresponding relation between electronic throttle aperture can obtain by tabling look-up.
Because the startup of automobile has two kinds of situations conventionally, a kind of is that automobile starts after flame-out for a long time, and now the coolant temperature of automobile is low, and intake temperature is low; Another kind is to restart after stopping working the automobile short time, now the coolant temperature of automobile is higher, and intake temperature is low, coolant temperature height can maintain the higher temperature of cylinder, although now intake temperature is low, but because the temperature of cylinder is higher, the volatility of alcohol fuel is guaranteed, and in the situation that ambient temperature is lower, also can successfully start.
As shown in Figure 2, for fear of unnecessary operation, optimize the energy-saving effect that improves alcohol fuel low temperature volatility method, method of the present invention also can comprise:
Gather the coolant temperature that cooling-water temperature transmitter records;
Judge that described coolant temperature is whether lower than cold start-up coolant temperature threshold value and judge that whether described intake temperature is lower than cold start-up intake temperature threshold value, those skilled in the art can select applicable cold start-up coolant temperature threshold value neatly, for example, described cold start-up coolant temperature threshold value is 27 ℃;
When described coolant temperature during lower than described cold start-up intake temperature threshold value, is closed electronic throttle lower than described cold start-up coolant temperature threshold value and described intake temperature.
By to the collection of coolant temperature and judgement, after the automobile short time is flame-out, can directly start, and the operation that does not need to close again electronic throttle and open electronic throttle.
The implementation process that the present invention improves alcohol fuel low temperature volatility method is as follows:
When key is placed in after ON shelves, start to gather intake temperature, coolant temperature and engine revolution, when intake temperature temperature, is closed electronic throttle, otherwise do not closed electronic throttle during lower than cold start-up coolant temperature lower than cold start-up intake temperature threshold value and coolant temperature; Along with engine revolution is increased to default revolution, increase gradually the aperture of electronics solar term, after the normal startup of motor, by concrete operating conditions electronic throttle.
As shown in Figure 3, the present invention also provides a kind of alcohol fuel automobile cold starting system, and it comprises: storage battery 1; Intake air temperature sensor 2; Electronic throttle 4; Engine rotation speed sensor 5; Engine control module 6, for gathering the intake temperature that described intake air temperature sensor 2 records, and judge that whether described intake temperature is lower than cold start-up intake temperature threshold value, when described intake temperature is during lower than described cold start-up intake temperature threshold value, close described electronic throttle 4, and gather the engine revolution that engine rotation speed sensor 5 records, when described engine revolution reaches default revolution, increase gradually the aperture of described electronic throttle 4, wherein, described cold start-up intake temperature threshold value is preferably 17 ℃.
In order to optimize the energy-saving effect that improves alcohol fuel low temperature volatility method, alcohol fuel automobile cold starting system also can comprise cooling-water temperature transmitter 3, described engine control module 6 gathers the coolant temperature that described cooling-water temperature transmitter 3 records, and judge that described coolant temperature is whether lower than cold start-up coolant temperature threshold value and judge that whether described intake temperature is lower than cold start-up intake temperature threshold value, when described coolant temperature is lower than described cold start-up coolant temperature threshold value and described intake temperature during lower than described cold start-up intake temperature threshold value, close described electronic throttle 4, preferably, described cold start-up intake temperature threshold value is 17 ℃.
Although the present invention is described in conjunction with above embodiment, but the present invention is not defined to above-described embodiment, and being only subject to the restriction of claims, those of ordinary skills can easily modify to it and change, but do not leave essence design of the present invention and scope.
Claims (10)
1. improve an alcohol fuel low temperature volatility method, it is characterized in that, comprising:
Gather the intake temperature that intake air temperature sensor records;
Judge that whether described intake temperature is lower than cold start-up intake temperature threshold value;
When described intake temperature is during lower than described cold start-up intake temperature threshold value, close electronic throttle;
Gather the engine revolution that engine rotation speed sensor records;
When described engine revolution reaches default revolution, increase gradually the aperture of described electronic throttle.
2. raising alcohol fuel low temperature volatility method according to claim 1, is characterized in that, described cold start-up intake temperature threshold value is 17 ℃.
3. raising alcohol fuel low temperature volatility method according to claim 1, is characterized in that, the described aperture that increases gradually described electronic throttle specifically comprises:
By accelerator pedal position, obtain the Engine torque T needing;
By the Engine torque T of described needs, obtain the fuel injection quantity F needing;
By the fuel injection quantity F of described needs, obtain the air inlet quality m needing
1;
Calculating standard air inlet quality m
0=(P
0* V)/(R * T
0), wherein V is cylinder volume, P
0for standard atmospheric pressure, R is gas constant, T
0for preset temperature;
Gather MAT T
1, according to the air inlet quality m of described needs
1with described MAT T
1, calculate the air-distributor pressure P needing
1=[(m
1* T
1)/(m
0* T
0)] * P
0;
Air-distributor pressure P by described needs
1, the aperture of electron gain closure.
4. raising alcohol fuel low temperature volatility method according to claim 3, is characterized in that, described preset temperature is 20 ℃.
5. raising alcohol fuel low temperature volatility method according to claim 1, is characterized in that, described method also comprises:
Gather the coolant temperature that cooling-water temperature transmitter records;
Judge that described coolant temperature is whether lower than cold start-up coolant temperature threshold value and judge that whether described intake temperature is lower than cold start-up intake temperature threshold value;
When described coolant temperature during lower than described cold start-up intake temperature threshold value, is closed electronic throttle lower than described cold start-up coolant temperature threshold value and described intake temperature.
6. raising alcohol fuel low temperature volatility method according to claim 5, is characterized in that, described cold start-up coolant temperature threshold value is 27 ℃.
7. an alcohol fuel automobile cold starting system, is characterized in that, comprising:
Storage battery;
Intake air temperature sensor;
Electronic throttle;
Engine rotation speed sensor;
Engine control module, for gathering the intake temperature that described intake air temperature sensor records, and judge that whether described intake temperature is lower than cold start-up intake temperature threshold value, when described intake temperature is during lower than described cold start-up intake temperature threshold value, close described electronic throttle, and gather the engine revolution that engine rotation speed sensor records, when described engine revolution reaches default revolution, increase gradually the aperture of described electronic throttle.
8. alcohol fuel automobile cold starting system according to claim 7, is characterized in that, described cold start-up intake temperature threshold value is 17 ℃.
9. alcohol fuel automobile cold starting system according to claim 7, it is characterized in that, also comprise cooling-water temperature transmitter, described engine control module gathers the coolant temperature that described cooling-water temperature transmitter records, and judge that described coolant temperature is whether lower than cold start-up coolant temperature threshold value and judge that whether described intake temperature is lower than cold start-up intake temperature threshold value, when described coolant temperature during lower than described cold start-up intake temperature threshold value, is closed described electronic throttle lower than described cold start-up coolant temperature threshold value and described intake temperature.
10. alcohol fuel automobile cold starting system according to claim 9, is characterized in that, described cold start-up intake temperature threshold value is 17 ℃.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410279656.1A CN104033252A (en) | 2014-06-19 | 2014-06-19 | Method for increasing low-temperature volatility of ethanol fuel and cold starting system for ethanol-fuel cars |
| PCT/CN2014/093982 WO2015192622A1 (en) | 2014-06-19 | 2014-12-16 | Method for increasing low-temperature volatility of ethanol fuel and cold starting system for ethanol-fuel cars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410279656.1A CN104033252A (en) | 2014-06-19 | 2014-06-19 | Method for increasing low-temperature volatility of ethanol fuel and cold starting system for ethanol-fuel cars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104033252A true CN104033252A (en) | 2014-09-10 |
Family
ID=51464202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410279656.1A Pending CN104033252A (en) | 2014-06-19 | 2014-06-19 | Method for increasing low-temperature volatility of ethanol fuel and cold starting system for ethanol-fuel cars |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104033252A (en) |
| WO (1) | WO2015192622A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763542A (en) * | 2015-01-27 | 2015-07-08 | 长城汽车股份有限公司 | Hybrid fuel engine control method, control system, and vehicle |
| WO2015192622A1 (en) * | 2014-06-19 | 2015-12-23 | 安徽江淮汽车股份有限公司 | Method for increasing low-temperature volatility of ethanol fuel and cold starting system for ethanol-fuel cars |
| CN108869138A (en) * | 2018-04-13 | 2018-11-23 | 长安大学 | A kind of spark-ignition engine cold starting system and its control method |
| CN115306616A (en) * | 2022-08-12 | 2022-11-08 | 上海新动力汽车科技股份有限公司 | Control method for improving cold starting performance and engine abrasion of engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115076006A (en) * | 2022-06-29 | 2022-09-20 | 上海和夏骏智科技有限公司 | Range extender type methanol engine low-temperature cold start system and start method |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2015192622A1 (en) | 2015-12-23 |
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Application publication date: 20140910 |