CN106481464B - Engine startup method, system and vehicle - Google Patents
Engine startup method, system and vehicle Download PDFInfo
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- CN106481464B CN106481464B CN201510534056.XA CN201510534056A CN106481464B CN 106481464 B CN106481464 B CN 106481464B CN 201510534056 A CN201510534056 A CN 201510534056A CN 106481464 B CN106481464 B CN 106481464B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The present invention provides a kind of engine startup method, system and vehicles, this method comprises: detecting whether to receive exhaust signal after vehicle is offline；If it is, being judged whether to enter exhaust mode according to air-fuel ratio, combustion state and engine speed when starting engine for the first time；If air-fuel ratio is greater than preset value, combustion state for no misfire fault and engine speed is less than preset rotation speed, enters exhaust mode to control no-bypassing fuel oil supply system and increase distributive value；When air-fuel ratio is less than preset value, engine speed is less than preset rotation speed or the exhaust mode duration is more than preset time, exhaust mode is exited.Rapidly the air in fuel rail can be discharged method of the invention, it is ensured that engine starts for the first time to be smoothly completed, and exhaust pollutant discharge and oil consumption when engine starts for the first time are reduced.
Description
Technical field
The present invention relates to automobile technical field, in particular to a kind of engine startup method, system and vehicle.
Background technique
Fuel oil supply system is used to fuel oil to be supplied to engine, and fuel oil supply system, which is divided into, oil return line fuel supply system
System and no-bypassing fuel oil supply system.
There is oil return line fuel oil supply system that can discharge the gas in fuel rail by the oil return line being connected with fuel rail
Body, so that guaranteeing that engine starts for the first time can smoothly complete, but fuel oil is recycled in fuel tank between fuel rail, is caused
Fuel oil is constantly heated by engine, and heat is taken to fuel tank, so that the steam pressure in fuel tank is higher, is filled to oil vapor treatment
It sets and increases difficulty, in addition, the distributive value into engine can be reduced after oil temperature increases, cause gaseous mixture partially dilute, arrange temperature rise
Height influences the service life of ternary catalyzing unit.
In order to eliminate the above problem, no-bypassing fuel oil supply system comes into being, though no-bypassing fuel oil supply system
The above problem can be so eliminated, but since no-bypassing fuel oil supply system eliminates oil return line, is started for the first time in engine
In the process, the air in fuel rail cannot be discharged well, and after fuel oil pump work, air is compressed at fuel rail, spray
Oily device needs after first air and fuel oil mixture have been sprayed, and could spray pure matter fuel oil, just will appear difficulty in starting for the first time, or even more
Secondary sparking could start the problem of engine.
Summary of the invention
In view of this, the present invention is directed to propose a kind of engine startup method, this method can be rapidly by fuel rails
In air discharge, it is ensured that engine start for the first time to be smoothly completed, exhaust pollutant of reduction engine when starting for the first time
Discharge and oil consumption.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of engine startup method, the engine carry out fuel feeding, the method by no-bypassing fuel oil supply system
The following steps are included: detecting whether to receive exhaust signal after vehicle is offline；If it is, for the first time starting described in start
When machine, judged whether to enter exhaust mode according to air-fuel ratio, combustion state and engine speed；If the air-fuel ratio is greater than pre-
If value, the combustion state is no misfire faults and the engine speed is less than preset rotation speed, then enter the exhaust mode
Distributive value is increased to control the no-bypassing fuel oil supply system；And when the air-fuel ratio is less than the preset value, described
When engine speed is less than preset rotation speed or the exhaust mode duration more than preset time, the exhaust mode is exited.
Further, distributive value of the no-bypassing fuel oil supply system under the exhaust mode is greater than described start
The distributive value of no-bypassing fuel oil supply system when machine normally starts.
Further, the exhaust signal is triggered by diagnostic equipment or offline equipment of writing with a brush dipped in Chinese ink.
Compared with the existing technology, engine startup method of the present invention has the advantage that
Engine startup method of the present invention starts in engine for the first time and according to air-fuel ratio, combustion state and hair
When the judgement of motivation revolving speed meets exhaust conditions, increase the distributive value of fuel injector, to rapidly arrange the air in fuel rail
Out, the excessive problem of the number of starts being likely to occur when starting for the first time is reduced, it is ensured that engine can be successfully disposably complete
At starting, the discharge and oil consumption of exhaust pollutant when engine starts for the first time are reduced.
It is another object of the present invention to propose a kind of engine starting system, which can rapidly be led fuel oil
Air discharge in rail, it is ensured that engine starts for the first time to be smoothly completed, and tail gas pollution when engine starts for the first time is reduced
Object discharge and oil consumption.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of engine starting system, comprising: exhaust signal trigger device, the exhaust signal trigger device are used for whole
After vehicle is offline, exhaust signal is triggered；Fuel oil supply system, the fuel oil supply system are no-bypassing fuel oil supply system, institute
Fuel oil supply system is stated for after receiving the exhaust signal, whether detection engine is to start for the first time, and in the hair
Motivation is to be judged whether to enter exhaust mode according to air-fuel ratio, combustion state and engine speed, and described when starting for the first time
Air-fuel ratio is greater than preset value, the combustion state for no misfire fault and when the engine speed is less than preset rotation speed, enters
The exhaust mode is to increase distributive value, and works as the air-fuel ratio and be less than the preset value, the engine speed less than pre-
If revolving speed or the exhaust mode duration are more than preset time, the exhaust mode is exited.
Further, distributive value of the no-bypassing fuel oil supply system under the exhaust mode is greater than described start
The distributive value of no-bypassing fuel oil supply system when machine normally starts.
Further, the exhaust signal trigger device is diagnostic equipment or offline writes with a brush dipped in Chinese ink equipment.
Further, the fuel oil supply system includes: fuel pump, and the fuel pump includes: oil outlet and oil return opening, combustion
Oil rectifier, one end of the fuel filter are connected with the oil outlet；Fuel rail assembly, the fuel rail assembly packet
It includes: fuel rail and fuel injector；The fuel rail assembly is connected with the other end of the fuel filter；Oil return pipe, it is described
One end of oil return pipe is connected with the oil return opening, and the other end of the oil return pipe is connected with the other end of the fuel filter；
Fuel pressure regulator, the fuel pressure regulator are integrated on the fuel pump；Controller, the controller respectively with institute
State fuel pump, the fuel rail assembly is connected with the fuel pressure regulator, to the fuel pump, the fuel rail
Assembly and the fuel pressure regulator are controlled.
Further, the fuel rail assembly further include: resonance piece, the resonance piece are located in the fuel rail.
Further, the resonance piece includes: the first resonance piece；Second resonance piece, first resonance piece and described
Two resonance pieces define hollow sealing structure.
The engine starting system and above-mentioned engine startup method compared with the existing technology possessed by advantage
Identical, details are not described herein.
It is another object of the present invention to propose a kind of vehicle, which can be rapidly by the air in fuel rail
Discharge, it is ensured that engine starts for the first time to be smoothly completed, and exhaust pollutant discharge and oil when engine starts for the first time are reduced
Consumption.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of vehicle is provided with the engine starting system as described in above-described embodiment.
Possessed advantage is identical compared with the existing technology with above-mentioned engine starting system for the vehicle, herein not
It repeats again.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of engine startup method described in the embodiment of the present invention；
Fig. 2 is the structural block diagram of engine starting system described in the embodiment of the present invention；
Fig. 3 is the schematic diagram of the fuel oil supply system of engine starting system described in the embodiment of the present invention；
Fig. 4 is showing for the fuel rail assembly of engine starting system intermediate fuel oil feed system described in the embodiment of the present invention
It is intended to.
Description of symbols:
200- engine starting system, 210- exhaust signal trigger device, 220- fuel oil supply system, 1- fuel pump, 2-
Fuel filter, 3- oil inlet pipe, 4- oil return pipe, 5- fuel rail assembly, 6- fuel rail, 7- fuel injector, 8- resonance piece.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Fig. 1 is the flow chart of engine startup method according to an embodiment of the invention.
Wherein, engine carries out fuel feeding by no-bypassing fuel oil supply system.
As shown in Figure 1, engine startup method according to an embodiment of the invention, includes the following steps:
S101: it after vehicle is offline, detects whether to receive exhaust signal.
Vehicle in the production line after the completion of, can be by diagnostic equipment or offline before the engine for starting vehicle for the first time
Write with a brush dipped in Chinese ink equipment triggering exhaust signal, wherein offline equipment of writing with a brush dipped in Chinese ink can be for the control into no-bypassing fuel oil supply system
The equipment that device processed writes with a brush dipped in Chinese ink program.
S102: if it is, when starting engine for the first time, judged according to air-fuel ratio, combustion state and engine speed
Whether exhaust mode is entered.
Wherein, judge whether engine is that the mode that starts for the first time is more, such as: one is provided in engine controller
A the flag bit initial situation can be 0 for identifying the flag bit whether engine started, and indicate engine from inactive
It crosses, after starting the engine, which can become 1, indicate that engine had been started up.
Air-fuel ratio can acquire the oxygen concentration in the tail gas of engine emission by lambda sensor, then according to oxymeter
Calculation obtains air-fuel ratio.
Combustion state includes normal combustion state and abnormal combustion state, when situation of catching fire, combustion state occurs in engine
For abnormal combustion state, corresponding misfire signal is generated.
S103: if air-fuel ratio is greater than preset value, combustion state for no misfire fault and engine speed is less than default turn
Speed enters exhaust mode then to control no-bypassing fuel oil supply system and increases distributive value.It should be noted that no-bypassing fires
Distributive value of the oily feed system under exhaust mode should be greater than the spray of no-bypassing fuel oil supply system when engine normally starts
Oil mass.
Wherein, air-fuel ratio, which is greater than preset value, indicates that fuel is less in the gaseous mixture of air and fuel, it may be assumed that gaseous mixture is partially dilute.
Preset value can be value as defined in satisfaction, and such as petrol engine, ideal air-fuel ratio is usually 14.7:1, can incite somebody to action
This ideal air-fuel ratio is as above-mentioned preset value, therefore, when the air-fuel ratio detected is greater than 14.7:1, is judged to mixing
Gas is partially dilute.
For combustion state, if engine sounding catches fire, misfire signal can be detected accordingly.
Under normal conditions, after the completion of engine start, the revolving speed of engine can be greater than or equal to a specific revolving speed
The revolving speed of (that is: preset rotation speed), and in engine starting process, engine can be less than this specific revolving speed, therefore, can be with
According to engine current rotating speed judge engine whether start completion.
Therefore, that is to say, that if flag bit is 0, the concentration of current gaseous mixture is partially dilute, do not occur catching fire situation and
When engine speed is less than preset rotation speed, then engine is in start-up course for the first time, needs to carry out Quick air-discharge at this time, that is, enters
The fuel injector of exhaust mode, control no-bypassing fuel oil supply system increases distributive value, in this way, no-bypassing fuel oil supply system
Fuel rail in air quickly sprayed into cylinder along with the big distributive value of fuel injector, reduce fuel rail in air stop
The time is stayed, the air in fuel rail can be discharged in a short period of time, fuel injector is made to spray pure fuel oil.Also,
Since fuel injector increases distributive value in the process, improve the concentration of gaseous mixture, it may be assumed that and air-fuel ratio becomes smaller, in this way,
It reduces and even is eliminated showing of being easy to catch fire when engine starts for the first time, and the starting of engine can be favorably accomplished, keep away
Exempt from engine and started for the first time that the 2-3 appearance that shows of striking sparks may be needed.
S104: when air-fuel ratio is less than preset value, engine speed is less than preset rotation speed or the exhaust mode duration is more than
When preset time, exhaust mode is exited.
That is, when the partially dense perhaps engine start completion of the concentration of gaseous mixture or evacuation time are more than pre- timing
Between, then determine that the air in fuel rail is basic or all empties, to exit exhaust mode, restores the normal work of engine
Make.
Engine startup method according to an embodiment of the present invention starts in engine for the first time and according to air-fuel ratio, burning shape
When state and engine speed judgement meet exhaust conditions, increase the distributive value of fuel injector, thus rapidly will be in fuel rail
Air discharge reduces the excessive problem of the number of starts being likely to occur when starting for the first time, it is ensured that engine can be successfully primary
Property complete to start, reduce the discharge and oil consumption of exhaust pollutant of engine when starting for the first time.
Fig. 2 is the structural block diagram of engine starting system according to an embodiment of the invention.As shown in Fig. 2, according to this
The engine starting system 200 of invention one embodiment, comprising: exhaust signal trigger device 210 and fuel oil supply system 220.
Wherein, exhaust signal trigger device 210 is used for after vehicle is offline, triggers exhaust signal.Wherein, exhaust signal touches
Transmitting apparatus 210 can be diagnostic equipment or offline write with a brush dipped in Chinese ink equipment, wherein offline equipment of writing with a brush dipped in Chinese ink can be for firing to no-bypassing
The equipment that controller in oily feed system writes with a brush dipped in Chinese ink program.Fuel oil supply system 220 is no-bypassing fuel oil supply system, fuel oil
Feed system 220 is used for after receiving exhaust signal, and it and is for the first time to open in engine that whether detection engine, which is to start for the first time,
When dynamic, judged whether to enter exhaust mode according to air-fuel ratio, combustion state and engine speed, and be greater than in air-fuel ratio and preset
Value, combustion state are for no misfire fault and when engine speed is less than preset rotation speed, into exhaust mode to increase distributive value, with
And when air-fuel ratio is less than preset value, engine speed is less than preset rotation speed or the exhaust mode duration is more than preset time,
Exit exhaust mode.Wherein, distributive value of the no-bypassing fuel oil supply system under exhaust mode is greater than engine and normally starts
When no-bypassing fuel oil supply system distributive value.
Engine starting system according to an embodiment of the present invention starts in engine for the first time and according to air-fuel ratio, burning shape
When state and engine speed judgement meet exhaust conditions, increase the distributive value of fuel injector, thus rapidly will be in fuel rail
Air discharge reduces the excessive problem of the number of starts being likely to occur when starting for the first time, it is ensured that engine can be successfully primary
Property complete to start, reduce the discharge and oil consumption of exhaust pollutant of engine when starting for the first time.
As shown in figure 3, a kind of no-bypassing fuel oil supply system 220 is shown, the no-bypassing fuel oil supply system 220
To include: fuel pump 1 (electric fuel punp 1 as shown in Figure 3), fuel filter 2, fuel rail assembly 5, oil return pipe 4, fuel oil
Pressure regulator (being not shown in Fig. 3) and controller (being not shown in Fig. 3).
Wherein, fuel pump 1 includes oil outlet and oil return opening.One end of fuel filter 2 is connected with oil outlet.Such as Fig. 4 institute
Show, fuel rail assembly 5 includes: fuel rail 6 and fuel injector 7.The other end phase of fuel rail assembly 5 and fuel filter 2
Even (that is: fuel rail assembly 5 is connected by oil inlet pipe 3 with the other end of fuel filter 2).One end of oil return pipe 4 and oil return
Mouth is connected, and the other end of oil return pipe 4 is connected with the other end of fuel filter 2.Fuel pressure regulator is integrated in fuel pump 1
On.Controller is connected with fuel pump 1, fuel rail assembly 5 and fuel pressure regulator respectively, to fuel pump 1, fuel rail
Assembly 5 and fuel pressure regulator are controlled.
Further, as shown in figure 4, fuel rail assembly 5 further include: resonance piece 8, resonance piece 8 are located at fuel rail 6
In.Wherein, resonance piece 8 includes: the first resonance piece and the second resonance piece, and the first resonance piece and the second resonance piece define hollow close
Seal structure.As a result, when fuel pressure increases, because resonance piece 8 is hollow sealing structure, there is certain contractility, lead to resonance
8 volume of piece reduces with slowing oil pressure rise.When fuel pressure reduces, resonance piece 8 has refresh memory characteristic, resonance piece 8
Restore volume, squeeze fuel oil, 6 fuel pressure of slowing oil guide rail reduces.
It should be noted that the specific implementation and the embodiment of the present invention of the engine starting system of the embodiment of the present invention
Engine startup method specific implementation it is similar, specifically refer to the description of method part, in order to reduce redundancy, herein
It does not repeat them here.
Further, embodiment of the invention discloses a kind of vehicle, it is provided with the engine as described in above-described embodiment
Activation system.The vehicle can start for the first time in engine and judge to meet according to air-fuel ratio, combustion state and engine speed
When exhaust conditions, increase the distributive value of fuel injector, to rapidly the air in fuel rail be discharged, when reduction starts for the first time
The excessive problem of the number of starts being likely to occur, it is ensured that engine successfully can disposably be completed to start, and reduce engine
The discharge and oil consumption of exhaust pollutant when starting for the first time.
In addition, other compositions of vehicle according to an embodiment of the present invention and effect are for those of ordinary skill in the art
For be all it is known, in order to reduce redundancy, do not repeat them here.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of engine startup method, which is characterized in that the engine carries out fuel feeding by no-bypassing fuel oil supply system,
It the described method comprises the following steps:
It after vehicle is offline, detects whether to receive exhaust signal, wherein the exhaust signal is for triggering in fuel rail
Air discharge signal；
If it is, when starting the engine for the first time, according to air-fuel ratio, combustion state and engine speed judge whether into
Enter exhaust mode, wherein the exhaust mode is the operating mode for the air in fuel rail to be discharged；
If the air-fuel ratio is greater than preset value, the combustion state for no misfire fault and the engine speed is less than default
Revolving speed then increases distributive value into the exhaust mode to control the no-bypassing fuel oil supply system；And
When the air-fuel ratio is less than the preset value, the engine speed is less than preset rotation speed or the exhaust mode continues
Between be more than preset time when, exit the exhaust mode.
2. engine startup method according to claim 1, which is characterized in that the no-bypassing fuel oil supply system exists
Distributive value under the exhaust mode is greater than the oil spout of the no-bypassing fuel oil supply system when engine normally starts
Amount.
3. engine startup method according to claim 1, which is characterized in that the exhaust signal is by diagnostic equipment or offline
Write with a brush dipped in Chinese ink equipment triggering.
4. a kind of engine starting system characterized by comprising
Exhaust signal trigger device (210), the exhaust signal trigger device (210) are used for after vehicle is offline, triggering exhaust
Signal, wherein the exhaust signal is the signal for triggering the discharge of the air in fuel rail；
Fuel oil supply system (220), the fuel oil supply system (220) are no-bypassing fuel oil supply system, and the fuel oil supplies
It is used for after receiving the exhaust signal to system (220), whether detection engine is to start for the first time, and in the engine
When to start for the first time, judged whether to enter exhaust mode according to air-fuel ratio, combustion state and engine speed, and in the air-fuel
Than being greater than preset value, the combustion state be no misfire fault and the engine speed less than preset rotation speed when, into described
Exhaust mode turns to increase distributive value, and when the air-fuel ratio is less than the preset value, the engine speed less than default
When the fast or described exhaust mode duration is more than preset time, the exhaust mode is exited, wherein the exhaust mode is to use
In the operating mode that the air in fuel rail is discharged.
5. engine starting system according to claim 4, which is characterized in that the no-bypassing fuel oil supply system exists
Distributive value under the exhaust mode is greater than the oil spout of the no-bypassing fuel oil supply system when engine normally starts
Amount.
6. engine starting system according to claim 4, which is characterized in that the exhaust signal trigger device is diagnosis
Instrument offline writes with a brush dipped in Chinese ink equipment.
7. engine starting system according to claim 4, which is characterized in that the fuel oil supply system includes:
Fuel pump (1), the fuel pump (1) include: oil outlet and oil return opening,
One end of fuel filter (2), the fuel filter (2) is connected with the oil outlet；
Fuel rail assembly (5), the fuel rail assembly (5) include: fuel rail (6) and fuel injector (7)；The fuel oil is led
Rail assembly (5) is connected with the other end of the fuel filter (2)；
One end of oil return pipe (4), the oil return pipe (4) is connected with the oil return opening, the other end of the oil return pipe (4) with it is described
The other end of fuel filter (2) is connected；
Fuel pressure regulator, the fuel pressure regulator are integrated on the fuel pump (1)；
Controller, the controller respectively with the fuel pump (1), the fuel rail assembly (5) and the fuel pressure tune
It saves device to be connected, to control the fuel pump (1), the fuel rail assembly (5) and the fuel pressure regulator.
8. engine starting system according to claim 7, which is characterized in that the fuel rail assembly further include: humorous
It shakes piece (8), the resonance piece (8) is located in the fuel rail (6).
9. engine starting system according to claim 8, which is characterized in that the resonance piece (8) includes:
First resonance piece；
Second resonance piece, first resonance piece and second resonance piece define hollow sealing structure.
10. a kind of vehicle, which is characterized in that be arranged just like the described in any item engine starting systems of claim 4-9.
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| CN201510534056.XA CN106481464B (en) | 2015-08-27 | 2015-08-27 | Engine startup method, system and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108644042B (en) * | 2018-04-25 | 2020-04-21 | 吉利汽车研究院（宁波）有限公司 | Oil way pre-exhaust method and system |
| CN109113884B (en) * | 2018-08-06 | 2020-06-02 | 东风汽车集团有限公司 | Starting auxiliary control method based on oil way system exhaust |
| CN110857668A (en) * | 2018-08-24 | 2020-03-03 | 世倍特汽车电子(长春)有限公司 | Method and vehicle for starting a direct injection engine for the first time |
| CN112922733B (en) * | 2021-01-29 | 2022-11-15 | 浙江吉利控股集团有限公司 | Vehicle first-time exhaust starting control method, device and equipment |
| CN113448318B (en) * | 2021-07-07 | 2022-08-16 | 江铃汽车股份有限公司 | Vehicle offline fault diagnosis control method |
| CN114320699A (en) * | 2021-12-27 | 2022-04-12 | 联合汽车电子有限公司 | Vehicle oil path exhaust starting method and device and storage medium |
| CN115807715A (en) * | 2022-11-20 | 2023-03-17 | 重庆长安汽车股份有限公司 | Automobile fuel pump control method, device, equipment and storage medium |
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| JP5167023B2 (en) * | 2008-08-08 | 2013-03-21 | ヤマハ発動機株式会社 | Marine propulsion device |
| JP5333524B2 (en) * | 2011-06-14 | 2013-11-06 | トヨタ自動車株式会社 | Diesel engine start control device |
| JP5742682B2 (en) * | 2011-11-18 | 2015-07-01 | トヨタ自動車株式会社 | Start control device for internal combustion engine |
| CN103195631A (en) * | 2013-04-11 | 2013-07-10 | 重庆拓普柴油机厂 | Oil injection pump capable of automatically discharging air mixed in oil pump |
| JP5747977B2 (en) * | 2013-12-03 | 2015-07-15 | 三菱自動車工業株式会社 | Engine control device |
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