CN108661813A - Natural gas engine idling undulated control strategy - Google Patents
Natural gas engine idling undulated control strategy Download PDFInfo
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- CN108661813A CN108661813A CN201810457655.XA CN201810457655A CN108661813A CN 108661813 A CN108661813 A CN 108661813A CN 201810457655 A CN201810457655 A CN 201810457655A CN 108661813 A CN108661813 A CN 108661813A
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- engine
- idling
- torque
- ignition angle
- fluctuation
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/08—Introducing corrections for particular operating conditions for idling
- F02D41/083—Introducing corrections for particular operating conditions for idling taking into account engine load variation, e.g. air-conditionning
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Ignition Timing (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The invention discloses a kind of natural gas engine idling undulated control strategy, it is suitable for gas powered vehicle, including following idling mode, PID adjustings, idling fluctuation status, torque deposit, torque deposit, ignition angle are tabled look-up and fluctuated and eliminate；Invention increases engine idling torque deposits, so that engine during mutually converting of idling when idling and mobile unit are opened, amendment of the ignition angle to engine torque is caused by the adjusting of torque deposit, reduce the fluctuation of engine idling, improve the response of engine idling, enable engine idling and open mobile unit when idling between smooth transition, so that vehicle operates steadily, improve vehicle driver comfort, even if in the process of moving, it will not cause engine misses, avoiding in turn leads to vehicle power-assisted steering failure, contribute to the life security of protection driver and passenger.
Description
Technical field
The present invention relates to natural gas engine control technology field more particularly to a kind of fluctuation controls of natural gas engine idling
System strategy.
Background technology
Currently, the gas engine of gas passenger car market application is low-power natural gas engine, idling and air-conditioning are idle
Fast control strategy is traditional idling PID control, adjusts air input of engine by air by Control PID, reaches idling steady control
Purpose.By taking combustion gas bus as an example, low-power natural gas engine, engine idling torque are configured on combustion gas bus
Smaller, matched air conditioner compressed acc power is larger, therefore the moment opened in compressor of air conditioner, and engine speed is due to air-conditioning pressure
Negative work caused by the operation of contracting machine so that engine speed drastically declines, or even the phenomenon that can cause engine misses, so as to cause
A series of harmfulness, such as：
(1) engine idling fluctuation leads to vehicle unusual fluctuations, reduces vehicle driver comfort；
(2) if turning on the aircondition in driving process causes engine misses, vehicle power-assisted steering failure can be caused, driver without
Method steering wheel rotation, easily causes traffic accident, endangers the life security of driver and passenger.
It is therefore desirable to be controlled to adjust to the engine idling on gas vehicle, to transmitter when eliminating starting of air conditioner
The fluctuation generated is run, the stability of transmitter operation is improved.
Invention content
Technical problem to be solved by the invention is to provide one kind to enable the engine to put down between idling and air-conditioning idling
Steady transition, the natural gas engine idling undulated control strategy for reducing the fluctuation of engine idling.
In order to solve the above technical problems, the technical scheme is that：Natural gas engine idling undulated control strategy is fitted
For gas powered vehicle, include the following steps,
Step 1: idling mode
Engine is set to be in idling state；
Step 2: PID is adjusted
Each sensor will detect signal and be respectively sent to Engine ECU on engine, and Engine ECU automatically extracts and by phase
It is delivered in PID coordinators after closing sensor signal conversion, torque arithmetic path is equipped in PID coordinators, carry out engine
Idling torque arithmetic；
Step 3: idling fluctuation status
When engine is in idling state, start mobile unit, during starting mobile unit, engine goes out
It now fluctuates, into idling fluctuation status；
Step 4: torque deposit
When idling fluctuation occurs in engine, each sensor that Engine ECU conveying comes when PID coordinators fluctuate idling is believed
It number is added to engine torque to calculate in path, calculates torque when engine surge, and go out to start according to the torque arithmetic
The air capacity that machine enter when fluctuating；
Step 5: torque deposit
For Engine ECU according to the practical fluctuation operating condition of present engine, calibration base torque deposit, cell voltage are low
Torque deposit, accessory torque deposit are converted into torque deposit after torque limiter limit value；
Step 6: ignition angle is tabled look-up
It is stored with the ignition angle being correspondingly arranged with torque deposit in Engine ECU to table look-up, is obtained and is worked as according to step 5
Front engine actual idle speed fluctuates the torque deposit under operating status, finds the corresponding angle of ignition in ignition angle is tabled look-up automatically
Spend undulating value α；
Step 7: fluctuation is eliminated
Under Engine ECU and current PID control, actual ignition angle is made to carry out ignition angle undulating value obtained by step 6
The floating of α adjusts, and so that actual ignition angle is matched with the air capacity entered obtained by step 4, is opened when eliminating engine idling
The fluctuation that mobile unit generates.
As the improvement to above-mentioned technical proposal, the mobile unit includes combustion gas on-board air conditioner.
By adopting the above-described technical solution, the beneficial effects of the invention are as follows：Engine idling torque deposit is increased, is made
Engine during mutually converting of idling when idling and mobile unit are opened is obtained, ignition angle is caused by the adjusting of torque deposit
Amendment to engine torque, reduces the fluctuation of engine idling, improves the response of engine idling, specifically has following
Advantage：
(1) bar transfer is steady when engine idling and mobile unit are opened so that vehicle operates steadily, and improves vehicle
Driver comfort；
(2) bar transfer is steady when engine idling and mobile unit are opened, even if in the process of moving, will not cause
Engine misses, and then avoid and lead to vehicle power-assisted steering failure, contribute to the life security for protecting driver and passenger.
Description of the drawings
The following drawings are only intended to schematically illustrate and explain the present invention, not delimit the scope of the invention.Wherein：
Fig. 1 is the simple work flow diagram of the embodiment of the present invention.
Specific implementation mode
With reference to the accompanying drawings and examples, the present invention is further explained.In the following detailed description, only pass through explanation
Mode describes certain exemplary embodiments of the present invention.Undoubtedly, those skilled in the art will recognize,
In the case of without departing from the spirit and scope of the present invention, described embodiment can be repaiied with a variety of different modes
Just.Therefore, attached drawing and description are regarded as illustrative in nature, and are not intended to limit the scope of the claims.
As shown in Figure 1, natural gas engine idling undulated control strategy, is suitable for gas powered vehicle, includes the following steps,
Step 1: idling mode
Engine is set to be in idling state, which can enter idling shape after engine start
State can also be that engine runs the idling state entered after a period of time.
Step 2: PID is adjusted
Each sensor will detect signal and be respectively sent to Engine ECU on engine, and Engine ECU automatically extracts and by phase
It is delivered in PID coordinators after closing sensor signal conversion, torque arithmetic path is equipped in PID coordinators, carry out engine
Idling torque arithmetic, each sensor used on engine includes speed probe etc., the PID tune of each sensor and engine
Section is the content known to those of ordinary skill in the art, is no longer described in detail herein.
Step 3: idling fluctuation status
When engine is in idling state, start mobile unit, during starting mobile unit, engine goes out
It now fluctuates, into idling fluctuation status.Mobile unit described in the present embodiment includes combustion gas on-board air conditioner, i.e., is in engine
When idling state, start combustion gas on-board air conditioner, in starting the vehicle-mounted air-conditioning process of combustion gas, engine fluctuates, and enters
Air-conditioning idling fluctuation status.
Step 4: torque deposit
When idling fluctuation occurs in engine, each sensor that Engine ECU conveying comes when PID coordinators fluctuate idling is believed
It number is added to engine torque to calculate in path, calculates torque when engine surge, and go out to start according to the torque arithmetic
The air capacity that machine enter when fluctuating, PID coordinators are ordinary skill people in the art to the specific pid algorithm of torque
Content known to member, is no longer described in detail herein.
Step 5: torque deposit
For Engine ECU according to the practical fluctuation operating condition of present engine, calibration base torque deposit, cell voltage are low
Torque deposit, accessory torque deposit are converted into torque deposit after torque limiter limit value.
Step 6: ignition angle is tabled look-up
It is stored with the ignition angle being correspondingly arranged with torque deposit in Engine ECU to table look-up, is obtained and is worked as according to step 5
Front engine actual idle speed fluctuates the torque deposit under operating status, finds the corresponding angle of ignition in ignition angle is tabled look-up automatically
Spend undulating value α.
Step 7: fluctuation is eliminated
Under Engine ECU and current PID control, actual ignition angle is made to carry out ignition angle undulating value obtained by step 6
The floating of α adjusts, and so that actual ignition angle is matched with the air capacity entered obtained by step 4, is opened when eliminating engine idling
The fluctuation that mobile unit generates.
After engine start, into idling or air-conditioning idling mode, during idling and air-conditioning idling switch, especially
It is the moment that compressor of air conditioner is opened, negative work caused by engine speed is run due to compressor of air conditioner so that engine speed
Generate fluctuation.When engine idling fluctuates, it on the one hand can be adjusted by PID coordinators, engine is calculated by PID
Air inflow；On the other hand by demarcating torque deposit so that ignition angle generates fluctuation according to the undulating value of idling, collaboration
PID is concured so that engine speed immediate stability achievees the purpose that idling steady controls.
Invention increases engine idling torque deposits so that engine idling when idling and mobile unit are opened
During mutually converting, amendment of the ignition angle to engine torque is caused by the adjusting of torque deposit, reduces engine idling
Fluctuation, improves the response of engine idling, specifically has the following advantages：
(1) bar transfer is steady when engine idling and mobile unit are opened so that vehicle operates steadily, and improves vehicle
Driver comfort；
(2) bar transfer is steady when engine idling and mobile unit are opened, even if in the process of moving, will not cause
Engine misses, and then avoid and lead to vehicle power-assisted steering failure, contribute to the life security for protecting driver and passenger.
The basic principles and main features and advantages of the present invention of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (2)
1. natural gas engine idling undulated control strategy is suitable for gas powered vehicle, it is characterised in that：Include the following steps,
Step 1: idling mode
Engine is set to be in idling state；
Step 2: PID is adjusted
Each sensor will detect signal and be respectively sent to Engine ECU on engine, and Engine ECU automatically extracts and passes correlation
It is delivered in PID coordinators after sensor signal conversion, torque arithmetic path is equipped in PID coordinators, carries out the idle of engine
Fast torque arithmetic；
Step 3: idling fluctuation status
When engine is in idling state, start mobile unit, during starting mobile unit, wave occurs in engine
It is dynamic, into idling fluctuation status；
Step 4: torque deposit
When idling fluctuation occurs in engine, each sensor signal that Engine ECU conveying comes when PID coordinators fluctuate idling adds
Enter to engine torque and calculate in path, calculates torque when engine surge, and engine wave is gone out according to the torque arithmetic
The air capacity that should enter when dynamic；
Step 5: torque deposit
Engine ECU is according to the practical fluctuation operating condition of present engine, calibration base torque deposit, cell voltage low torque
Deposit, accessory torque deposit are converted into torque deposit after torque limiter limit value；
Step 6: ignition angle is tabled look-up
It is stored with the ignition angle being correspondingly arranged with torque deposit in Engine ECU to table look-up, current hair is obtained according to step 5
Motivation actual idle speed fluctuates the torque deposit under operating status, finds corresponding ignition angle wave in ignition angle is tabled look-up automatically
Dynamic value α；
Step 7: fluctuation is eliminated
Under Engine ECU and current PID control, actual ignition angle is made to carry out ignition angle undulating value α obtained by step 6
It floats and adjusts, the air capacity entered obtained by actual ignition angle and step 4 is made to match, vehicle is opened when eliminating engine idling
Carry the fluctuation that equipment generates.
2. natural gas engine idling undulated control strategy as described in claim 1, it is characterised in that：The mobile unit packet
Include combustion gas on-board air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810457655.XA CN108661813B (en) | 2018-05-14 | 2018-05-14 | Idling fluctuation control strategy of natural gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810457655.XA CN108661813B (en) | 2018-05-14 | 2018-05-14 | Idling fluctuation control strategy of natural gas engine |
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| CN108661813A true CN108661813A (en) | 2018-10-16 |
| CN108661813B CN108661813B (en) | 2020-10-16 |
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| CN201810457655.XA Active CN108661813B (en) | 2018-05-14 | 2018-05-14 | Idling fluctuation control strategy of natural gas engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502846A (en) * | 2020-04-07 | 2020-08-07 | 东风汽车集团有限公司 | Method for controlling gas circuit torque by idling engine |
| CN111502845A (en) * | 2020-04-07 | 2020-08-07 | 东风汽车集团有限公司 | Method for controlling fire path torque by idling engine |
| CN112628002A (en) * | 2020-12-18 | 2021-04-09 | 东风汽车有限公司 | Fuel vehicle, engine control idling control method, electronic equipment and engine controller |
| CN112628001A (en) * | 2019-09-24 | 2021-04-09 | 上海汽车集团股份有限公司 | Method and device for setting idling of heat engine |
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| CN103807039A (en) * | 2012-11-09 | 2014-05-21 | 通用汽车环球科技运作有限责任公司 | Adaptive engine speed control to prevent engine from roll and stall |
| CN106965794A (en) * | 2016-01-07 | 2017-07-21 | 现代自动车株式会社 | Method and controller and motor vehicle driven by mixed power for the over-discharge that prevents battery |
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| US20110247587A1 (en) * | 2010-04-13 | 2011-10-13 | Gm Global Technology Operations, Inc. | Method for accommodating extraneous loads during idle operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112628001A (en) * | 2019-09-24 | 2021-04-09 | 上海汽车集团股份有限公司 | Method and device for setting idling of heat engine |
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| CN111502845A (en) * | 2020-04-07 | 2020-08-07 | 东风汽车集团有限公司 | Method for controlling fire path torque by idling engine |
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| CN112628002A (en) * | 2020-12-18 | 2021-04-09 | 东风汽车有限公司 | Fuel vehicle, engine control idling control method, electronic equipment and engine controller |
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| CN108661813B (en) | 2020-10-16 |
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