CN104153918A - Preheating method for ethanol fuel engine - Google Patents
Preheating method for ethanol fuel engine Download PDFInfo
- Publication number
- CN104153918A CN104153918A CN201410421559.1A CN201410421559A CN104153918A CN 104153918 A CN104153918 A CN 104153918A CN 201410421559 A CN201410421559 A CN 201410421559A CN 104153918 A CN104153918 A CN 104153918A
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- China
- Prior art keywords
- heating
- preheating
- engine
- controlling unit
- ethanol fuel
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/125—Fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
Abstract
The invention discloses a preheating method for an ethanol fuel engine. The preheating method includes the steps that a preheating signal transmitting device sends out preheating requesting signals, a signal receiving device receives the requesting signals, and after an engine control device processes the preheating requesting signals, a heating device is started to conduct heating. Thus, the ethanol fuel engine can be preheated in advance before a driver enters a vehicle, the engine can be started rapidly, the waiting time of the driver is shortened, and the convenience and comfort of driving are promoted.
Description
Technical field
The invention belongs to field of engine control, particularly a kind of pre-heating mean of ethanol fuel engine.
Background technique
Because the chemical property of ethanol class A fuel A is different from conventional gasoline fuel with physical property, ethanol can not volatilize when lower than 12 ℃, and this will cause cold start-up difficulty under ethanol class engine low temperature.
At present, for solving ethanol fuel engine cold start-up problem, someone has proposed a kind of flexible fuel vehicle cold start-up method, the method as shown in Figure 1, mainly by storage battery, as power supply, pass through to adopt heating fuel injector, by fuel preheating before injection, put forward the temperature before high fuel injection, to improve fuel atomizing effect.Whether this system requirements driver first gets to key ON shelves, activates engine control module, then to heating, judge and heating function is controlled in detail.This function need driver artificial key is screwed to ON shelves, from driver, key is got to ON shelves, to heating, finish, after driver need wait for the regular hour, vehicle could be started, thus, quick startup cannot be realized, thereby reduced driving comfortability, convenience.And along with the reduction of temperature, engine control module calculate heating time can further increase.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method that shifted to an earlier date preheating ethanol fuel engine before driver enters vehicle.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
A pre-heating mean for ethanol fuel engine, comprises the steps:
Judge whether car key is inserted into keyhole, if not, start remote control preheating, its step is as follows:
(1.1) preheating sender unit sends warm-up demand signal;
(1.2) signal receiving device receives the demand signal in described step (1.1);
(1.3) described signal receiving device sends warm-up demand to engine controlling unit, and this engine controlling unit receives to be sentenced heating times after signal and whether reached the upper limit, if reached the upper limit, stops warm-up demand, if do not reach the upper limit,
(1.4) engine controlling unit judges whether to meet preheating condition, if meet, preheating condition starts that heating equipment heats and heating times counting once and by remote control preheat mode flag bit set in engine controlling unit, heating times counting zero clearing after motor successfully starts, the zero clearing of described remote control preheat mode flag bit, does not start heating equipment if do not meet preheating condition;
If car key is inserted in keyhole and gear is ON shelves, initiation key gear preheating, its step is as follows:
(2.1) engine controlling unit judges the whether set of remote control preheat mode flag bit, if set can start automobile, if not set,
(2.2) engine controlling unit judges whether to meet preheating condition, if meet preheating condition, starts heating equipment and heats, if do not meet preheating condition, does not start heating equipment.
Preferably, described preheating condition comprises: temperature judgement, if ambient temperature, lower than setting temperature, allows heating, otherwise, do not allow heating.
Preferably, signal receiving device described in described step (1.3) postpones to send warm-up demand to engine controlling unit after a period of time.
Preferably, described signal receiving device postpones to send warm-up demand to engine controlling unit after 1 second.
Preferably, described heating equipment, in heating process, is low to moderate the limit value that cannot meet again warm-up the engine and make the normal startup of starting-motor of engine if monitor storage battery electric weight, stops heating.
Preferably, described preheating sender unit is remote-control key.
Preferably, described signal receiving device is BCM.
Preferably, described engine controlling unit is ECU.
Preferably, described heating equipment is heating fuel injector.
The pre-heating mean of ethanol fuel engine of the present invention sends warm-up demand signal by preheating sender unit, signal receiving device receives described request signal, after engine controlling unit is processed warm-up demand signal, starting heating equipment heats, thereby can before entering vehicle, driver shift to an earlier date preheating ethanol fuel engine, and then realize the quick startup of motor, the stand-by period of having saved driver, promoted convenience and the travelling comfort of driving.
Accompanying drawing explanation
Fig. 1 is existing ethanol fuel engine heating means;
The flow chart of the pre-heating mean of the ethanol fuel engine that Fig. 2 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
A pre-heating mean for ethanol fuel engine, as shown in Figure 2, comprises the steps:
First, judge whether car key is inserted into keyhole, if not, start remote control preheating, its step is as follows:
(1.1) preheating sender unit sends warm-up demand signal; In the present embodiment, preferably, described preheating sender unit is remote-control key, using the wireless unlocking signal of remote controlled unlocking as warm-up demand signal, thus, automobile remote-control unlocking device and preheating sender unit can be united two into one, greatly facilitate driver's operation.
(1.2) signal receiving device receives the demand signal in described step (1.1); In the present embodiment, preferably, described signal receiving device is BCM (Body Conrol Module, automobile body control module), because BCM presents modular trend, so BCM can integrated more function, therefore, BCM can make Auto Electronic Controlled System more succinct as signal receiving device.
(1.3) BCM sends warm-up demand to engine controlling unit, in the present embodiment, and preferably, described engine controlling unit is ECU (Electronic Control Unit, electronic control unit, automobile specified computer controller, is also automobile specified single-chip microcomputer).
BCM and ECU can carry out communication by CAN bus, define a value and are 0 or 1 variable and characterize warm-up demand signal, and ECU periodically reads upper this signal value of CAN.When this value is 1, indicate warm-up demand; Value is 0 o'clock, without preheating request.
BCM and ECU also can carry out communication by rigid line, and level value and the endurance of the useful signal of definition warm-up demand signal, for example, can define warm-up demand signal is the 12V level signal of 500ms.
In the present embodiment, after BCM postpones a period of time (preferably 1 second), send warm-up demand to ECU.The object postponing is to carry out a judgement to signal, prevents driver's misoperation or without driving intention, by extending a period of time, if BCM does not receive the remote-control key signal of locking a door within this extended period, sends warm-up demand to ECU; If receive the remote-control key signal of locking a door within the extended period, do not send warm-up demand.
ECU receives and sentences heating times after signal and whether reached the upper limit, set in the present embodiment heating times on be limited to 3 times, when heating times reaches upper limit number of times 3, during the 4th heating request, though ECU can be waken up, stop warm-up demand, can not heat.Now need to adopt key gear awakening mode could start heating function, so can effectively protect storage battery, cannot ato unit after avoiding heating for multiple times to cause storage battery feed.If do not reach the upper limit,
(1.4) engine controlling unit judges whether to meet preheating condition, and wherein preheating condition comprises temperature judgement, if ambient temperature, lower than 20 ℃ of setting temperatures, allows heating, otherwise, do not allow heating.In addition, preheating condition also comprises: whether fuel is that whether E100 alcohol fuel, ECU currently have diagnostic trouble code, whether level voltage meets the demands, whether allows remote control preheating etc.
If meet, preheating condition starts that heating equipment heats and heating times counting once and by remote control preheat mode flag bit set (this flag bit is set in advance in ECU) in ECU, heating times counting zero clearing after motor successfully starts, the zero clearing of described remote control preheat mode flag bit, does not start heating equipment if do not meet preheating condition.
If car key is inserted in keyhole and gear is ON shelves, initiation key gear preheating, its step is as follows:
(2.1) engine controlling unit judges the whether set of remote control preheat mode flag bit, if set can start automobile, if not set,
(2.2) engine controlling unit judges whether to meet preheating condition, basic identical in preheating condition and step (1.4) wherein, but need not judge whether to allow remote control preheating, if meet preheating condition, start heating equipment and heat, if do not meet preheating condition, do not start heating equipment.After heating, can ato unit.
In addition, heating equipment, in heating process, is low to moderate the limit value that cannot meet again warm-up the engine and make the normal ato unit of starting electrical machinery if monitor storage battery electric weight, stops heating.Thereby, guarantee that electric weight can meet driver and enters after vehicle by gear preheating and start vehicle, to have avoided because driver does not repeatedly enter vehicle after remote control preheating for a long time, the serious feed of storage battery causes vehicle to start.
Preferably, heating equipment is heating fuel injector, and so, oil sprayer can, to alcohol fuel preheating, be realized atomization before accepting the fuel injection pulse signal that ECU sends here before injection.
The pre-heating mean of this ethanol fuel engine sends warm-up demand signal by preheating sender unit, signal receiving device receives described request signal, after engine controlling unit is processed warm-up demand signal, starting heating equipment heats, thereby can before entering vehicle, driver shift to an earlier date preheating ethanol fuel engine, and then realize the quick startup of motor, the stand-by period of having saved driver, promoted convenience and the travelling comfort of driving.
In sum, content of the present invention is not limited in the above-described embodiments, and those skilled in the art can propose other mode of execution easily according to guiding theory of the present invention, and these mode of executions all comprise within the scope of the present invention.
Claims (9)
1. a pre-heating mean for ethanol fuel engine, is characterized in that, comprises the steps:
Judge whether car key is inserted into keyhole, if not, start remote control preheating, its step is as follows:
(1.1) preheating sender unit sends warm-up demand signal;
(1.2) signal receiving device receives the demand signal in described step (1.1);
(1.3) described signal receiving device sends warm-up demand to engine controlling unit, and this engine controlling unit receives to be sentenced heating times after signal and whether reached the upper limit, if reached the upper limit, stops warm-up demand, if do not reach the upper limit,
(1.4) engine controlling unit judges whether to meet preheating condition, if meet, preheating condition starts that heating equipment heats and heating times counting once and by remote control preheat mode flag bit set in engine controlling unit, heating times counting zero clearing after motor successfully starts, the zero clearing of described remote control preheat mode flag bit, does not start heating equipment if do not meet preheating condition;
If car key is inserted in keyhole and gear is ON shelves, initiation key gear preheating, its step is as follows:
(2.1) engine controlling unit judges the whether set of remote control preheat mode flag bit, if set can start automobile, if not set,
(2.2) engine controlling unit judges whether to meet preheating condition, if meet preheating condition, starts heating equipment and heats, if do not meet preheating condition, does not start heating equipment.
2. the pre-heating mean of ethanol fuel engine according to claim 1, is characterized in that, described preheating condition comprises:
Temperature judgement, if ambient temperature, lower than setting temperature, allows heating, otherwise, do not allow heating.
3. the pre-heating mean of ethanol fuel engine according to claim 1, is characterized in that: signal receiving device described in described step (1.3) postpones to send warm-up demand to engine controlling unit after a period of time.
4. the pre-heating mean of ethanol fuel engine according to claim 3, is characterized in that: described signal receiving device postpones to send warm-up demand to engine controlling unit after 1 second.
5. the pre-heating mean of ethanol fuel engine according to claim 1, it is characterized in that: described heating equipment is in heating process, if monitor storage battery electric weight, be low to moderate the limit value that cannot meet again warm-up the engine and make the normal startup of starting-motor of engine, stop heating.
6. the pre-heating mean of ethanol fuel engine according to claim 1, is characterized in that: described preheating sender unit is remote-control key.
7. the pre-heating mean of ethanol fuel engine according to claim 1, is characterized in that: described signal receiving device is BCM.
8. the pre-heating mean of ethanol fuel engine according to claim 1, is characterized in that: described engine controlling unit is ECU.
9. the pre-heating mean of ethanol fuel engine according to claim 1, is characterized in that: described heating equipment is heating fuel injector.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410421559.1A CN104153918B (en) | 2014-08-25 | 2014-08-25 | The pre-heating mean of ethanol fuel engine |
| PCT/CN2014/093922 WO2016029598A1 (en) | 2014-08-25 | 2014-12-16 | Preheating method for ethanol fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410421559.1A CN104153918B (en) | 2014-08-25 | 2014-08-25 | The pre-heating mean of ethanol fuel engine |
Publications (2)
| Publication Number | Publication Date |
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| CN104153918A true CN104153918A (en) | 2014-11-19 |
| CN104153918B CN104153918B (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410421559.1A Active CN104153918B (en) | 2014-08-25 | 2014-08-25 | The pre-heating mean of ethanol fuel engine |
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| CN (1) | CN104153918B (en) |
| WO (1) | WO2016029598A1 (en) |
Cited By (5)
| 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 |
| WO2016029598A1 (en) * | 2014-08-25 | 2016-03-03 | 安徽江淮汽车股份有限公司 | Preheating method for ethanol fuel engine |
| CN107013395A (en) * | 2017-04-24 | 2017-08-04 | 浙江吉利控股集团有限公司 | A kind of vehicle motor activation system and method |
| CN108331694A (en) * | 2018-01-25 | 2018-07-27 | 奇瑞汽车股份有限公司 | A kind of alcohol fuel cold start householder method |
| US20220111702A1 (en) * | 2019-08-08 | 2022-04-14 | Ningbo Geely Automobile Research & Development Co., Ltd. | Method for preconditioning vehicles |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826728B (en) * | 2019-04-16 | 2024-02-06 | 安徽长吉专用汽车制造有限公司 | Intelligent temperature control system with remote control starting function for diesel truck |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016029598A1 (en) * | 2014-08-25 | 2016-03-03 | 安徽江淮汽车股份有限公司 | Preheating method for ethanol fuel engine |
| 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 |
| CN107013395A (en) * | 2017-04-24 | 2017-08-04 | 浙江吉利控股集团有限公司 | A kind of vehicle motor activation system and method |
| CN108331694A (en) * | 2018-01-25 | 2018-07-27 | 奇瑞汽车股份有限公司 | A kind of alcohol fuel cold start householder method |
| US20220111702A1 (en) * | 2019-08-08 | 2022-04-14 | Ningbo Geely Automobile Research & Development Co., Ltd. | Method for preconditioning vehicles |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016029598A1 (en) | 2016-03-03 |
| CN104153918B (en) | 2016-05-11 |
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Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee before: Anhui Jianghuai Automotive Co., Ltd. |
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