CN102434302A - High-pressure starting control method of direct injection gasoline engine - Google Patents
High-pressure starting control method of direct injection gasoline engine Download PDFInfo
- Publication number
- CN102434302A CN102434302A CN2011104575682A CN201110457568A CN102434302A CN 102434302 A CN102434302 A CN 102434302A CN 2011104575682 A CN2011104575682 A CN 2011104575682A CN 201110457568 A CN201110457568 A CN 201110457568A CN 102434302 A CN102434302 A CN 102434302A
- Authority
- CN
- China
- Prior art keywords
- starting
- pressure
- high pressure
- fuel
- judge
- Prior art date
- 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.)
- Granted
Links
Images
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a high-pressure starting control method of a direct injection gasoline engine. The method is characterized in that in the starting stage of the direct injection gasoline engine, a high-pressure fuel pump is driven to inject fuel into a high-pressure fuel rail so as to establish fuel pressure in the fuel rail; and at the same time, whether the state of the engine reaches the high-pressure starting condition is judged, and whether the starting injection sign is set can be determined according to the judgment result. By the adoption of the method, the emission problem of the direct injection gasoline engine in the starting stage can be improved, fuel can be atomized very well in the starting process of the type of engine, the concentration of mixed gas can be reduced effectively, combustion efficiency can be enhanced and emission situation can be improved.
Description
Technical field
The present invention relates to a kind of direct spray petrol engine in cylinder high pressure method for starting-controlling, belong to a kind of method of the mixed gas state when improving engine start.
Background technique
Mixed gas is a key factor for the normal starting of petrol engine.When direct spray petrol engine in cylinder was in state of starting operating, because fuel oil temperature and pressure are lower, gasoline atomizing was not good.Usually can access the limit of catching fire with interior proportions of ingredients when guaranteeing engine start, need in starting process, carry out enriching, can guarantee reliable starting.Yet in this case, the emission effect of petrol engine is not satisfactory.
Summary of the invention
The purpose of this invention is to provide a kind of direct spray petrol engine in cylinder high pressure method for starting-controlling; It improves the direct spray petrol engine in cylinder emission problem in when starting, and atomized fuel better in this type of engine start process effectively reduces mixture strength; Improve combustion efficiency, improve discharging.
Technological scheme of the present invention is achieved in that direct spray petrol engine in cylinder high pressure method for starting-controlling; It is characterized in that: at the direct spray petrol engine in cylinder starting period; Drive high pressure oil pump and inject fuel oil to high pressure oil rail; Set up the fuel pressure in the oily rail, judge simultaneously whether engine condition satisfies the high pressure starting conditions, and judge in view of the above whether the oil spout sign is started in set;
Judge whether motor can be accomplished the high pressure starting and can be divided into following step:
(1) judges whether the precondition that enables the high pressure starting satisfies; Concrete grammar is: judge whether coolant temperature is in the scope of permission; Judge that oily rail pressure sensor does not have fault and oily rail pressure sensor signal does not have ultra scope fault; If the precondition of above-mentioned high pressure starting satisfies, then carry out next step, otherwise directly carry out the low pressure starting;
(2) judge whether the fuel oil in the oily rail can set up suitable pressure in the time that allows; Concrete grammar is: under the situation that the precondition that enables the high pressure starting satisfies; If the fuel pressure in the oily rail reaches the required pressure limit of high pressure starting in the maximum engine circulating cycle issue of setting; Think that promptly current working can carry out high pressure starting, otherwise can only carry out the low pressure starting.It should be noted that high pressure starts required pressure limit and maximum engine cycle period limit value is determined by the engine start temperature, the rail pressure limit value that different cranking temperatures is corresponding is different with the engine cycle limit value;
(3) judge after the fuel pressure that satisfies the high pressure starting is successfully set up whether to keep stable; Concrete grammar is: can monitoring fuel pressure value be kept above the pressure minimum limit value that the high pressure starting is allowed always; If this pressure can keep; Then set high pressure start identification starts otherwise carry out low pressure;
Judge starting oil spout sign whether the method for set be: judge whether the precondition that enables the high pressure starting satisfies, if condition satisfies, then need do further judgement, and concrete steps are:
(1) judges the whether set of high pressure start identification, if this flag set then will be started the oil spout sign and is changed to state of activation;
(2) judge that whether fuel pressure successfully set up at the appointed time,, then will start the oil spout sign and be changed to effective status if the time that oily rail pressure is set up exceeds limit value;
As long as above-mentioned two starting oil spout flag set conditions have any establishment, then start the oil spout sign and should be changed to effective status; (3) precondition of high pressure starting does not satisfy or high pressure starts minimum fuel pressure and can not in the time of appointment, set up, and need directly carry out the low pressure starting, also answers set starting oil spout sign this moment;
When high pressure start identification and starting oil spout sign all are set, then motor can start under higher injection pressure, and the fuel oil that is ejected in the firing chamber is better atomized, thereby the reduction oil consumption improves starting process and discharges.
Good effect of the present invention is can make direct spray petrol engine in cylinder in starting process, reduce oil consumption and reach better emission level; Especially concerning cold starting, can be low, under the situation about not being activated in catalyst converter transducer temperature, the discharging when improving starting.
Description of drawings
Fig. 1 is a direct spray petrol engine in cylinder oil supply system structural representation.
Fig. 2 is the basic controlling illustraton of model of patent of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further: like Fig. 1, shown in 2; Direct spray petrol engine in cylinder high pressure method for starting-controlling; It is characterized in that: at the direct spray petrol engine in cylinder starting period, drive high pressure oil pump and inject fuel oil, set up the fuel pressure in the oily rail to high pressure oil rail; Judge simultaneously whether engine condition satisfies the high pressure starting conditions, and judge in view of the above whether the oil spout sign is started in set;
Judge whether motor can be accomplished the high pressure starting and can be divided into following step:
(1) judges whether the precondition that enables the high pressure starting satisfies; Concrete grammar is: judge whether coolant temperature is in the scope of permission; Judge that oily rail pressure sensor does not have fault and oily rail pressure sensor signal does not have ultra scope fault; If the precondition of above-mentioned high pressure starting satisfies, then carry out next step, otherwise directly carry out the low pressure starting;
(2) judge whether the fuel oil in the oily rail can set up suitable pressure in the time that allows; Concrete grammar is: under the situation that the precondition that enables the high pressure starting satisfies; If the fuel pressure in the oily rail reaches the required pressure limit of high pressure starting in the maximum engine circulating cycle issue of setting; Think that promptly current working can carry out high pressure starting, otherwise can only carry out the low pressure starting.It should be noted that high pressure starts required pressure limit and maximum engine cycle period limit value is determined by the engine start temperature, the rail pressure limit value that different cranking temperatures is corresponding is different with the engine cycle limit value;
(3) judge after the fuel pressure that satisfies the high pressure starting is successfully set up whether to keep stable; Concrete grammar is: can monitoring fuel pressure value be kept above the pressure minimum limit value that the high pressure starting is allowed always; If this pressure can keep; Then set high pressure start identification starts otherwise carry out low pressure;
Judge starting oil spout sign whether the method for set be: judge whether the precondition that enables the high pressure starting satisfies, if condition satisfies, then need do further judgement, and concrete steps are:
(1) judges the whether set of high pressure start identification, if this flag set then will be started the oil spout sign and is changed to state of activation;
(2) judge that whether fuel pressure successfully set up at the appointed time,, then will start the oil spout sign and be changed to effective status if the time that oily rail pressure is set up exceeds limit value;
As long as above-mentioned two starting oil spout flag set conditions have any establishment, then start the oil spout sign and should be changed to effective status;
(3) precondition of high pressure starting does not satisfy or high pressure starts minimum fuel pressure and can not in the time of appointment, set up, and need directly carry out the low pressure starting, also answers set starting oil spout sign this moment;
When high pressure start identification and starting oil spout sign all are set, then motor can start under higher injection pressure, and the fuel oil that is ejected in the firing chamber is better atomized, thereby the reduction oil consumption improves starting process and discharges.
When motor is in state of starting operating; Judge that at first the engine start temperature is in particular range; And the state of oily rail pressure sensor circuit Reflector is FALSE (showing that this oil rail pressure sensor does not have fault), and the transfinite state of Reflector of oily rail pressure sensor signal is set to FALSE (showing the ultra scope fault of this oil rail pressure sensor no signal), if above-mentioned condition is all set up; Show that then this moment, the precondition of high pressure starting satisfied, this is set is masked as TRUE.
According to the engine start temperature, the fuel pressure limit value that allows the high pressure starting is set and sets up the patient maximum engine cycle period limit value of this pressure.Monitor current fuel pressure value and whether be higher than the rail pressure limit value that allows the high pressure starting; If fuel pressure is not successfully set up in exceeding the maximum engine circulating cycle issue that sets,, and can maintain; Then this moment high pressure start identification TRUE should be set, starting oil spout sign also should be changed to TRUE.
If above-mentioned arbitrary condition do not set up, the high pressure start identification should be changed to FALSE, and starting oil spout sign should be changed to TRUE, shows that the present engine state is suitable to carry out the high pressure starting, needs then carries out the low pressure starting.
Claims (1)
1. direct spray petrol engine in cylinder high pressure method for starting-controlling; It is characterized in that: at the direct spray petrol engine in cylinder starting period; Drive high pressure oil pump and inject fuel oil to high pressure oil rail; Set up the fuel pressure in the oily rail, judge simultaneously whether engine condition satisfies the high pressure starting conditions, and judge in view of the above whether the oil spout sign is started in set;
Judge whether motor can be accomplished the high pressure starting and can be divided into following step:
(1) judges whether the precondition that enables the high pressure starting satisfies; Concrete grammar is: judge whether coolant temperature is in the scope of permission; Judge that oily rail pressure sensor does not have fault and oily rail pressure sensor signal does not have ultra scope fault; If the precondition of above-mentioned high pressure starting satisfies, then carry out next step, otherwise directly carry out the low pressure starting;
(2) judge whether the fuel oil in the oily rail can set up suitable pressure in the time that allows; Concrete grammar is: under the situation that the precondition that enables the high pressure starting satisfies; If the fuel pressure in the oily rail reaches the required pressure limit of high pressure starting in the maximum engine circulating cycle issue of setting; Think that promptly current working can carry out high pressure starting, otherwise can only carry out the low pressure starting; It should be noted that high pressure starts required pressure limit and maximum engine cycle period limit value is determined by the engine start temperature, the rail pressure limit value that different cranking temperatures is corresponding is different with the engine cycle limit value;
(3) judge after the fuel pressure that satisfies the high pressure starting is successfully set up whether to keep stable; Concrete grammar is: can monitoring fuel pressure value be kept above the pressure minimum limit value that the high pressure starting is allowed always; If this pressure can keep; Then set high pressure start identification starts otherwise carry out low pressure;
Judge starting oil spout sign whether the method for set be: judge whether the precondition that enables the high pressure starting satisfies, if condition satisfies, then need do further judgement, and concrete steps are:
(1) judges the whether set of high pressure start identification, if this flag set then will be started the oil spout sign and is changed to state of activation;
(2) judge that whether fuel pressure successfully set up at the appointed time,, then will start the oil spout sign and be changed to effective status if the time that oily rail pressure is set up exceeds limit value;
As long as above-mentioned two starting oil spout flag set conditions have any establishment, then start the oil spout sign and should be changed to effective status; (3) precondition of high pressure starting does not satisfy or high pressure starts minimum fuel pressure and can not in the time of appointment, set up, and need directly carry out the low pressure starting, also answers set starting oil spout sign this moment;
When high pressure start identification and starting oil spout sign all are set, then motor can start under higher injection pressure, and the fuel oil that is ejected in the firing chamber is better atomized, thereby the reduction oil consumption improves starting process and discharges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110457568.2A CN102434302B (en) | 2011-12-31 | 2011-12-31 | High-pressure starting control method of direct injection gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110457568.2A CN102434302B (en) | 2011-12-31 | 2011-12-31 | High-pressure starting control method of direct injection gasoline engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102434302A true CN102434302A (en) | 2012-05-02 |
| CN102434302B CN102434302B (en) | 2016-01-06 |
Family
ID=45982598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110457568.2A Expired - Fee Related CN102434302B (en) | 2011-12-31 | 2011-12-31 | High-pressure starting control method of direct injection gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102434302B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013350A (en) * | 2017-05-26 | 2017-08-04 | 安徽江淮汽车集团股份有限公司 | A kind of direct spray petrol engine in cylinder cold starts fuel injection control method and system |
| CN107765567A (en) * | 2017-09-20 | 2018-03-06 | 中国第汽车股份有限公司 | A kind of directly jetting gasoline engine high-pressure fuel oil system emulator |
| CN111396208A (en) * | 2020-03-21 | 2020-07-10 | 东风汽车集团有限公司 | Oil injection control method for vehicle equipped with direct injection engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10176574A (en) * | 1996-12-19 | 1998-06-30 | Toyota Motor Corp | Fuel injection controller for internal combustion engine |
| JP2000130232A (en) * | 1998-10-27 | 2000-05-09 | Toyota Motor Corp | Control device for internal combustion engine |
| JP2008038857A (en) * | 2006-08-10 | 2008-02-21 | Hitachi Ltd | Control device of cylinder injection type internal combustion engine |
| US20130138327A1 (en) * | 2010-10-27 | 2013-05-30 | Toyota Jidosha Kabushiki Kaisha | Fuel injection control system for internal combustion engine |
-
2011
- 2011-12-31 CN CN201110457568.2A patent/CN102434302B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10176574A (en) * | 1996-12-19 | 1998-06-30 | Toyota Motor Corp | Fuel injection controller for internal combustion engine |
| JP2000130232A (en) * | 1998-10-27 | 2000-05-09 | Toyota Motor Corp | Control device for internal combustion engine |
| JP2008038857A (en) * | 2006-08-10 | 2008-02-21 | Hitachi Ltd | Control device of cylinder injection type internal combustion engine |
| US20130138327A1 (en) * | 2010-10-27 | 2013-05-30 | Toyota Jidosha Kabushiki Kaisha | Fuel injection control system for internal combustion engine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013350A (en) * | 2017-05-26 | 2017-08-04 | 安徽江淮汽车集团股份有限公司 | A kind of direct spray petrol engine in cylinder cold starts fuel injection control method and system |
| CN107765567A (en) * | 2017-09-20 | 2018-03-06 | 中国第汽车股份有限公司 | A kind of directly jetting gasoline engine high-pressure fuel oil system emulator |
| CN111396208A (en) * | 2020-03-21 | 2020-07-10 | 东风汽车集团有限公司 | Oil injection control method for vehicle equipped with direct injection engine |
| CN111396208B (en) * | 2020-03-21 | 2021-05-28 | 东风汽车集团有限公司 | Oil injection control method for vehicle equipped with direct injection engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102434302B (en) | 2016-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103161587B (en) | Variable ignition type diesel-gasoline dual fuel powered combustion engine, system and method | |
| CN102278221B (en) | Control device for in-cylinder fuel injection type internal combustion engine | |
| CN104828071B (en) | A kind of device and method for starting engine | |
| KR101693895B1 (en) | Variable ignition type engine for complex combustion using diesel and gasoline, method for controlling of the same and complex combustion system using diesel and gasoline | |
| CN100414084C (en) | Engine start control system of internal combustion engine | |
| CN102852659B (en) | The control gear of direct injection engine | |
| CN104704221A (en) | Internal Combustion Engine | |
| CN101208506A (en) | Control apparatus for internal combustion engine | |
| CN101532443A (en) | Control apparatus for vehicle | |
| CN102472175A (en) | Method for operating an internal combustion engine for gaseous and liquid fuel and internal combustion machine | |
| CN101144448A (en) | Pre-heating fuel for cold start | |
| CN101387232B (en) | Engine cranking system with cylinder deactivation for a direct injection engine | |
| CN102434302B (en) | High-pressure starting control method of direct injection gasoline engine | |
| CN104832306B (en) | Motor vehicle fuel ejection control method and device | |
| CN101397960A (en) | Gas-fired compressor control device and high-pressure pump control device of direct injection engine | |
| CN105971752A (en) | Control unit for a multi-cylinder internal combustion engine | |
| JP2006090328A (en) | Starting method for internal combustion engine | |
| JP5229185B2 (en) | Combustion control device for internal combustion engine | |
| CN109184929B (en) | Ignition and combustion integrated system of dual-fuel engine and control method thereof | |
| JP2013133792A5 (en) | ||
| CN103291482A (en) | Engine, and oil injection control method and oil injection control device for engine | |
| EP2669505A1 (en) | Control device for internal combustion engine | |
| CN101982652A (en) | Fuel pressure controller and high pressure pump controller of direct-injection engine | |
| CN107407224A (en) | The control device of internal combustion engine and the control method of internal combustion engine | |
| JP2007327434A (en) | Engine control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 Termination date: 20191231 |