CN112377320B - Method for controlling the initial temperature of the gas in the cylinder of the first ignition cycle of the engine - Google Patents
Method for controlling the initial temperature of the gas in the cylinder of the first ignition cycle of the engine Download PDFInfo
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- CN112377320B CN112377320B CN202011164066.6A CN202011164066A CN112377320B CN 112377320 B CN112377320 B CN 112377320B CN 202011164066 A CN202011164066 A CN 202011164066A CN 112377320 B CN112377320 B CN 112377320B
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- temperature
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 27
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 abstract description 10
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000010304 firing Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
- F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2409—Addressing techniques specially adapted therefor
- F02D41/2422—Selective use of one or more tables
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2496—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories the memory being part of a closed loop
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3076—Controlling fuel injection according to or using specific or several modes of combustion with special conditions for selecting a mode of combustion, e.g. for starting, for diagnosing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3082—Control of electrical fuel pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
- F02P5/1502—Digital data processing using one central computing unit
- F02P5/1506—Digital data processing using one central computing unit with particular means during starting
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Signal Processing (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
本发明公开一种控制发动机第一次着火循环气缸内气体初始温度的方法，利用发动机电控单元控制加热过程，在节气门开度与试验要求相同的条件下，通过调节喷入进气管内的汽油质量和空气量，用火花点燃气缸内混合气来加热燃烧室，并根据安装在排气道内的温度传感器来计算气缸内的残余废气温度和燃烧室内的热力状态，在达到设定的气缸内残余废气温度和热力状态后，自动将电控单元切换到设定气缸内气体温度下的发动机燃烧过程测试控制模式。
The invention discloses a method for controlling the initial temperature of the gas in the cylinder of the first ignition cycle of the engine. The electric control unit of the engine is used to control the heating process. Gasoline quality and air volume, use the spark to ignite the mixture in the cylinder to heat the combustion chamber, and calculate the residual exhaust gas temperature in the cylinder and the thermal state in the combustion chamber according to the temperature sensor installed in the exhaust port. After the residual exhaust gas temperature and thermal state, the electronic control unit is automatically switched to the engine combustion process test control mode under the set gas temperature in the cylinder.
Description
Technical Field
The invention relates to the technical field of initial gas temperature control and combustion in an engine, in particular to a method for controlling the initial temperature of gas in a combustion chamber of the engine.
Background
The temperature of the gas in the cylinder before the first firing of the engine is an important factor affecting the formation and combustion of the combustible mixture. At present, most methods for controlling the temperature of the gas in the cylinder use an intake air heater, such as the disclosed patents CN110296026A and CN209129761U, etc., and the heating time of the electric heater is calculated according to the temperature of the gas in the engine gas, and the temperature of the gas in the cylinder is indirectly controlled by controlling the temperature of the air in the intake air pipe.
Temperature control using such gas heating results in a slower rise in air temperature within the combustion chamber, especially at lower ambient temperatures, where the engine needs to be run over longer engine-out conditions to achieve the desired air temperature. This not only reduces the efficiency of the engine test, but also makes it difficult to accurately control the cylinder gas temperature. Therefore, there is a strong need for an efficient and rapid in-cylinder temperature control method for the first firing cycle of an engine.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for controlling the initial temperature of gas in a cylinder of a first firing cycle of an engine.
The purpose of the invention is realized by the following technical scheme:
the method for controlling the initial temperature of gas in a first ignition cycle cylinder of an engine is based on a gasoline injection control system, wherein the gasoline injection control system comprises a gasoline tank, a gasoline pump, a gasoline rail, a crankshaft position sensor, a camshaft position sensor, an exhaust temperature sensor, an exhaust oxygen sensor and an electric control unit; the gasoline tank, the gasoline pump and the gasoline rail are used for supplying oil to the gasoline injector; the crankshaft position sensor is positioned at a crankshaft end cover and used for measuring the real-time rotating speed of the engine; the camshaft position sensor is positioned at the upper part of the air inlet camshaft and used for determining gasoline injection time and spark plug ignition time by combining signals of the crankshaft position sensor; the exhaust temperature sensor and the exhaust oxygen sensor are integrated and fixed in an engine exhaust passage and are used for measuring the real-time temperature and the air-fuel ratio of gas in an engine cylinder; the electronic control unit is used for acquiring sensor signals and controlling the gasoline pump and the gasoline injector to work; the method comprises the following steps:
step 3, starting a heating control mode by an engine electronic control unit;
and 7, switching the engine electronic control unit to a test control mode.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. when the spark plug is used for igniting gasoline in an engine cylinder, a large amount of heat is released to directly heat the combustion chamber, the heating speed is high, and the set target temperature value can be quickly reached while the engine dragging-down time is shortened.
2. The amount of gasoline injected may be controlled using a closed loop MAP-based control strategy to reduce the amount of fuel consumed during the warm-up process.
3. The method can realize the regulation and control of the target parameters without adding external facilities, thereby reducing the operation cost and being more easily accepted by users.
4. The method is simple and convenient to operate, can be quickly finished in the engine back-dragging process, and does not need to carry out additional operation.
Drawings
FIG. 1 is a schematic diagram of a gasoline injection control system configuration for the method of the present invention.
Fig. 2 is a flowchart of the control method according to the embodiment of the present invention.
Reference numerals: 1-gasoline tank, 2-gasoline pump, 3-gasoline rail, 4-gasoline injector, 5-intake pipe, 6-cylinder head, 7-camshaft position sensor, 8-intake camshaft, 9-intake valve, 10-cylinder jacket, 11-piston, 12-crank link mechanism, 13-crankshaft, 14-spark plug, 15-exhaust camshaft, 16-exhaust valve, 17-crankshaft position sensor, 18-crankshaft end cover, 19-exhaust temperature sensor, 20-exhaust oxygen sensor, 21-exhaust pipe and 22-electronic control unit.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Embodiments of the present invention will be specifically described with reference to fig. 1 to 2.
A method for rapidly controlling the initial temperature of gas in a cylinder during a first firing cycle of an engine, a gasoline injection control system comprising: the device comprises a gasoline tank 1, a gasoline pump 2, a gasoline rail 3, a crankshaft position sensor 17, a camshaft position sensor 7, an exhaust temperature sensor 19, an exhaust oxygen sensor 20 and an electronic control unit 22; the gasoline rail 3 and the gasoline injector 4 are mounted on the engine intake pipe 5, and the spark plug 14 is mounted in the engine cylinder. All the sensors, the gasoline injector 4 and the gasoline pump 2 are connected to the electronic control unit 22; the gasoline pump 2 is controlled by the electronic control unit 22 to suck gasoline from the gasoline tank 1 and deliver the gasoline to the gasoline rail 3 and the gasoline injector 4. And finally supplying gasoline with the oil supply system under 0.3 MPa. The gasoline tank 1, the gasoline pump 2 and the gasoline rail 3 are used for supplying fuel to the gasoline injector 4; a crankshaft position sensor 17 is located at the crankshaft end cap 18 for measuring the real-time rotational speed of the engine crankshaft 13; the camshaft position sensor 7 is positioned at the upper part of the air inlet camshaft 8, the air inlet camshaft 8 is positioned on the cylinder cover 6 of the engine, and the gasoline injection time and the ignition time of the spark plug 14 are determined by measuring the closing and opening times of the air inlet valve 9 and combining the signals of the crankshaft position sensor 17; an exhaust temperature sensor 19 and an exhaust oxygen sensor 20 are integrated and fixed in an engine exhaust pipe 21, and after an exhaust camshaft 15 opens an exhaust valve 16, real-time temperature and air-fuel ratio of gas exhausted from a cylinder of the engine are measured; the electronic control unit 22 is used for collecting sensor signals and controlling the gasoline pump 2 and the gasoline injector 4 to work. Gasoline is sprayed into an air inlet pipe of the engine and enters a cylinder consisting of a cylinder sleeve 10, a piston 11 and a cylinder cover 6, then a crank connecting rod mechanism 12 drives the piston 11 to move upwards in the cylinder sleeve 10, mixed gas of the gasoline and air is compressed, and finally flame with higher temperature is generated through spark ignition; after the gasoline consumption is finished, a large amount of waste gas with higher temperature is generated in the cylinder to heat the combustion chamber; and when the temperature of the gas in the cylinder reaches a set value, automatically switching to an engine combustion process test control mode.
The specific method for controlling the initial temperature of the gas in the cylinder in the first ignition cycle of the engine comprises the following steps:
step 1: setting the residual exhaust gas temperature and thermodynamic state target value in the cylinder, and storing the parameters into a specific storage position of an electronic control unit;
step 2: starting the engine, judging whether the temperature and the thermodynamic state in the engine cylinder are smaller than set target values according to an exhaust temperature sensor, if so, turning to the step 3, otherwise, turning to the step 7;
and step 3: the engine electronic control unit enters a heating control mode;
and 4, step 4: obtaining the air-fuel ratio in an engine cylinder according to an exhaust oxygen sensor, and calculating the corresponding gasoline injection amount;
and 5: calculating the rotating speed of the engine according to signals of a crankshaft position sensor and a camshaft position sensor and controlling the gasoline injection time and the ignition time of a spark plug;
step 6: according to the gasoline injection quantity, the gasoline injection time and the ignition time of the spark plug which are obtained by calculation, the electronic control unit controls the gasoline pump and the gasoline injector to be started, the spark plug ignites, and corresponding numerical values are stored in a specific storage position of the electronic control unit in an MAP mode;
and 7: the engine electric control unit is switched from a heating control mode to a starting test control mode;
and (6) ending.
The present invention is not limited to the above-described embodiments. The foregoing description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above specific embodiments are merely illustrative and not restrictive. Those skilled in the art can make many changes and modifications to the invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011164066.6A CN112377320B (en) | 2020-10-27 | 2020-10-27 | Method for controlling the initial temperature of the gas in the cylinder of the first ignition cycle of the engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011164066.6A CN112377320B (en) | 2020-10-27 | 2020-10-27 | Method for controlling the initial temperature of the gas in the cylinder of the first ignition cycle of the engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112377320A CN112377320A (en) | 2021-02-19 |
| CN112377320B true CN112377320B (en) | 2022-03-29 |
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| CN202011164066.6A Active CN112377320B (en) | 2020-10-27 | 2020-10-27 | Method for controlling the initial temperature of the gas in the cylinder of the first ignition cycle of the engine |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2057972A1 (en) * | 1970-11-25 | 1972-06-29 | Bosch Gmbh Robert | Cold start and warm-up device for internal combustion engines with external ignition |
| JPH10122015A (en) * | 1996-10-24 | 1998-05-12 | Mitsubishi Motors Corp | Exhaust heating device |
| JP2004052694A (en) * | 2002-07-22 | 2004-02-19 | Mazda Motor Corp | Control device for spark-ignition engine |
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| EP1840359A1 (en) * | 2006-03-31 | 2007-10-03 | Mazda Motor Corporation | Control system for multi-cylinder four-cycle engine |
| JP2012107588A (en) * | 2010-11-18 | 2012-06-07 | Mitsubishi Motors Corp | Control device for internal combustion engine |
| CN106414985A (en) * | 2013-11-07 | 2017-02-15 | 艾克莫特公司 | Internal combustion engine and method of direct fuel injection |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4447530B2 (en) * | 2005-07-26 | 2010-04-07 | トヨタ自動車株式会社 | In-cylinder direct injection internal combustion engine control device |
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| US20150114339A1 (en) * | 2013-10-31 | 2015-04-30 | Delphi Technologies, Inc. | Cold start strategy and system for gasoline direct injection compression ignition engine |
| US20150122217A1 (en) * | 2013-11-07 | 2015-05-07 | Transonic Combustion, Inc. | Internal combustion engine and method of direct fuel injection |
| JP6416603B2 (en) * | 2014-12-05 | 2018-10-31 | 日立オートモティブシステムズ株式会社 | Control device for internal combustion engine |
-
2020
- 2020-10-27 CN CN202011164066.6A patent/CN112377320B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2057972A1 (en) * | 1970-11-25 | 1972-06-29 | Bosch Gmbh Robert | Cold start and warm-up device for internal combustion engines with external ignition |
| JPH10122015A (en) * | 1996-10-24 | 1998-05-12 | Mitsubishi Motors Corp | Exhaust heating device |
| JP2004052694A (en) * | 2002-07-22 | 2004-02-19 | Mazda Motor Corp | Control device for spark-ignition engine |
| WO2006043679A1 (en) * | 2004-10-22 | 2006-04-27 | Toyota Jidosha Kabushiki Kaisha | Device and method for stopping an engine |
| EP1840359A1 (en) * | 2006-03-31 | 2007-10-03 | Mazda Motor Corporation | Control system for multi-cylinder four-cycle engine |
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| CN112377320A (en) | 2021-02-19 |
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