CN101761406A - Method and device for controlling blending gas of electric-control diesel engine - Google Patents
Method and device for controlling blending gas of electric-control diesel engine Download PDFInfo
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- CN101761406A CN101761406A CN201010117611A CN201010117611A CN101761406A CN 101761406 A CN101761406 A CN 101761406A CN 201010117611 A CN201010117611 A CN 201010117611A CN 201010117611 A CN201010117611 A CN 201010117611A CN 101761406 A CN101761406 A CN 101761406A
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Abstract
The invention relates to a method and a device for controlling blending gas of an electric-control diesel engine. The invention can judge the running state of the engine according to rotation speed signals, throttle pedal signals, original diesel spraying pulse width signals and the like, and reasonably set the blending ratio to enable the diesel and gas ratio to achieve the optimum proportion state, therefore the diesel consumption rate and waste gas exhaust are reduced on the premise of ensuring the dynamic property of the engine. The method for controlling blending gas of an electric-control diesel engine comprises a quick and moderate control method for diesel and gas switching, a real-time accurate control method for gas amount and diesel amount, a self-learning control method for bad working conditions and a fault diagnosis function with fault diagnosis and alarming. The device for controlling blending gas of an electric-control diesel engine comprises a signal acquisition module, a diesel spraying amount acquisition and control module, a natural gas supply control module, a microcontroller, a CAN communication module and a serial communication module.
Description
Technical field
The present invention relates to engine control system, be specifically related to a kind of method and apparatus of blending gas of electric-control diesel engine control.
Background technique
Current, the energy and environmental pollution problem are more and more outstanding.When automobile fuel consumption becomes automobile operation significant cost, vehicle exhaust also more and more becomes the principal element of urban air pollution, in order to reduce automobile operation cost energy saving, reduce the pollution of vehicle exhaust, on the basis that guarantees the original power character of motor, use combustion gas rapidly as the hybrid vehicle development of mixing the burning energy to environment.Combustion gas has than the better fuel economy of diesel oil, and exhaust pollutant content is lower.Wherein, mix toxic emission and this two big index of fuel economy that burning controlling method and device directly influence hybrid electric vehicle engine.
In the prior art, the diesel engine blending gas mainly is that machinery combines with electronics.In this control mode, electronic control is adopted in combustion gas control, and the control of diesel oil amount mainly is to take mechanical linkage to control, and obviously has very big deficiency so existing diesel engine is mixed the firing method nuclear device:
A. existing blending gas controlling method can not accurately be controlled the diesel oil amount that participates in burning.This makes motor can not be operated in the best at each operating point to mix burning than state, and then has influenced stability, power character, Economy and the discharging of whole motor operation;
B. existing blending gas controlling method and device can not real-time regulated be mixed the burning ratio with the change of surrounding environment.As at high temperature, plateau and extremely frigid zones, this makes existing blending gas control gear that significant limitation be arranged in the use;
C. existing blending gas controlling method and device mix burn exist aspect the fault diagnosis not enough.When the work of diesel engine fuel oil supply system is undesired, should stop to mix the burning rock gas, and take positive action.But real-time diagnosis can't be accomplished by the existing burning system of mixing.
Therefore there is defective in prior art aspect the diesel engine blending gas.
Summary of the invention
The embodiment of the invention provides a kind of method and apparatus of blending gas of electric-control diesel engine control, can reasonable disposition mix the burning ratio so that oil-gas ratin reaches best proportioning state, thereby under the prerequisite that guarantees engine power performance, reduce diesel consumption rate and toxic emission.
For achieving the above object, technological scheme of the present invention is implemented as follows:
A kind of method of electronic controlled diesel blending gas control comprises: the fault diagnosis functions that oil gas switches rapid soft controlling method, gas quantity and the real-time accuracy control method of diesel oil amount, bad working environments Learning Control Method, has tracing trouble and report to the police.
A kind of electronic controlled diesel is mixed the device that burns rock gas control, comprising: signal acquisition module, the collection of diesel injection amount and control module, rock gas are supplied with control module, microcontroller, CAN communication module, serial communication modular.
The method and apparatus of this blending gas of electric-control diesel engine control of the embodiment of the invention, on the basis that does not change former electrical control system for engine, coupling one is overlapped automatical control system on the one hand.Install a cover gas supply system on the other hand additional.According to the running state of judgement motors such as tach signal, accelerator pedal signal, original fuel injection pulsewidth signal, the ratio of reasonable disposition fuel injection quantity and jet amount when can realize that original power character is constant, reduces fuel consumption rate and toxic emission.
Description of drawings
Fig. 1 mixes for electronic controlled diesel in the embodiment of the invention and burns control system mechanical structure schematic representation.
Fig. 2 mixes for electronic controlled diesel in the embodiment of the invention and burns the controlling method schematic flow sheet.
Fig. 3 mixes the composition structural representation that burns control gear for electronic controlled diesel in the embodiment of the invention.
Embodiment
For making purpose of the present invention, technological scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
For convenience, before illustration method and device, introducing in the embodiment of the invention electronic controlled diesel earlier mixes and burns control system mechanical structure, shown in Figure 1, comprise that combustion gas gas cylinder 101, vaporizer 102, flowmeter 103, filter 104, high-pressure solenoid valve 105, decompressor 106, gas injector 107 also has figure to go up to the mixer that marks etc.
The embodiment of the invention provides a kind of method of blending gas of electric-control diesel engine control, and flow process comprises as shown in Figure 2:
Step 201: gather the original fuel injection signal of diesel oil, comprise injection timing information, injection time information, oil spout is interrupted and is interrupted number of times.Injection timing information is used for determining the zero hour and the finish time of oil spout; Injection time information is used for determining the size of fuel injection quantity; Oil spout is interrupted and is interrupted number of times and is used to judge whether motor is in the DECEL ENLEAN state and judges whether the motor fuel injection control circuit is in damaged condition.Other sensor information collections comprise cooling-water temperature sensor, intake air temperature sensor, and air inlet pressure sensor, pedal position sensor, the 12V power information is gathered, and the 24V power information is gathered, speed probe.This step is given next step with the oil spout relevant information and each the sensor relevant information that collect, carries out correlation computations.
Step 202: comprehensive relevant information that step 201 collects, make to judge: 1. whether each sensor of motor and diesel fuel nozzle are in normal working; 2. judge according to suction pressure, rotating speed and water temperature information whether motor starts; 3. change to judge which kind of operating mode motor is in and 4. burns the enable switch signal according to mixing according to pedal, rotary speed information, injection time, judge whether motor is in and mix the burning enabled state.
For judging 1., if operation irregularity is not then mixed burning and sent warning message.For judging 2.,, do not mix burning at the engine start state.For judging 3., at idling mode, use pure diesel oil work, do not mix burning; At the DECEL ENLEAN state, do not mix burning; Rationally limit oily distribution in other operating mode, guarantee that power character, Economy, discharging etc. reach requirement.For judging 4., only mix to burn and just allow to mix burning when enable switch is opened.
To sum up judge, start when motor satisfies simultaneously, non-idling, non-fault, non-DECEL ENLEAN, mix and burn when enabling five conditions, carry out oil gas according to engine condition information and mix burning.
Step 203: when according to the resulting engine operation information of step 201, satisfy mixing of step 202 and burn when requiring, mix burning.Mix to burn and divide exceed oil and two aspects of air feed, comprehensive engine operation condition, calibrating with pedal position and rotating speed is the two-dimentional injection time table of reference.Mixing under the burning state, motor determines according to pedal position and rotating speed in the diesel injection time of each operation point, promptly should two dimension oil spout restriction table have provided the consumption of each operation point diesel oil.Owing to be limited in below 50% of the required diesel oil of proper functioning at the needed diesel oil in each operation point, the moment of torsion of motor also descends thereupon.The moment of torsion that is lacked is filled up with the burning of combustion gas.In practice, calibrate the fuel gas injection table according to the limit oil mass of operation point and pedal position and rotating speed.So far, mixing under the burning state, motor be with oil gentle mix dynamically working that burning provided, reduce diesel-fuel consumption by the method for limitting oil, mode by aerating is filled up power loss, under the prerequisite of not losing engine power performance, accomplishes to reduce fuel cost, reduce noxious gas emission, improve the motor overall target.
Step 204: the transition request of mixing burning from pure diesel combustion to oil gas is steady, and this just requires in the handoff procedure, and the instantaneous reduction amount of diesel injection can not be excessive, fuel gas supply moment increasing amount can not be excessive.In the handoff procedure of reality, the diesel injection amount is that reference is successively decreased with time, and simultaneously, the fuel gas supply increase also is with reference to increasing progressively, mixing until desired oil gas and burn ratio with time.
Step 205: oil gas is mixed and is burnt than finally being complete by step 205.This implementation comprises following two parts: 1. limit is oily, and limit oil is to realize by the break-make of controlling diesel fuel nozzle.Calculate limit oil mass (this limit oil mass is weighed with injection time) by step 203 and step 204, in step 201, obtain the opening time and the corresponding bent axle number of teeth of original fuel injection signal, with the oil spout opening time be starting point, open diesel fuel nozzle path control switch, and make it continue to calculate the gained injection time, cut off the control switch of diesel fuel nozzle path afterwards, realize the diesel injection restriction with this.2. air feed according to engine working conditions, in the corresponding bent axle number of teeth, is opened gas nozzle, and is made it to continue to calculate the jet time of gained, closes gas nozzle afterwards, realizes control to the gas supply amount with this.Need to prove, this controlling method does not influence original fuel injection signal, what done is according to engine working conditions, realize that by the time of limiting original fuel injection signal effect limit is oily, this limit oil will guarantee to influence the working condition of the former ECU of motor, in order to avoid cause former ECU to make failure judgment.This method had both realized the good property of original oil spout data, had reached the purpose to the oil spout restriction again.
The embodiment of the invention also provides a kind of device of electronic controlled diesel blending gas control.Fig. 3 is the structural representation of described diesel engine blending gas control gear.
Diesel engine ECU module 310, operating state information acquisition module 320, main controller module 330 and oil spout and jet module 340.
Described diesel engine ECU module 310 comprises diesel engine ECU module 311 and produces fuel injection signal module 312.Wherein diesel engine ECU module 311 is gathered each sensor and is carried out computational discrimination and produces the original fuel injection signal 312 of diesel engine by module 312.The original fuel injection signal that wherein original fuel injection signal module 312 produces passes to main controller module 330, and judges.
Described operating state information acquisition module 320 is obtained the status information of judging when motor normally moves, and described status information is sent to controller module 330;
Described operating state information acquisition module 320 comprises: accelerator pedal position sensor 321, cooling-water temperature sensor 322, air inlet pressure sensor 323, engine rotation speed sensor 324, intake air temperature sensor 325 and supply voltage acquisition module 326;
Described accelerator pedal position sensor 321 obtains accelerator pedal position information and sends to controller module 330;
Described cooling-water temperature sensor 322 obtains engine coolant temperature information and gives controller module 330;
Described air inlet pressure sensor 323 obtains suction pressure information and sends to controller module 330;
Described engine rotation speed sensor 324 obtains engine speed information and sends to controller module 330;
Described intake air temperature sensor 325 is obtained intake temperature information and is sent to controller module 330;
Described supply voltage acquisition module 326 obtains supply voltage information and sends to controller module 330;
Described controller module 330, obtain the status information that original fuel injection signal that diesel engine ECU module 310 provided and engine operating state information acquisition module 320 send, judge whether motor is in and to mix the burning operating mode, can mix when burning operating mode when not being in, controller module 330 will pass through notification unit 335, diesel fuel nozzle is not cut off control, make original fuel injection signal directly control diesel fuel nozzle.Can mix when burning operating mode when being in, calculate rising limit oil time and jet time by judgement, then by notification unit 335 to diesel fuel nozzle control submodule 337 and gas nozzle submodule 338, control mouth module 340 is carried out diesel injection and fuel gas injection;
Described controller module 330 comprises: engine operating state decision sub-module 331, diesel fuel nozzle control submodule 337 and gas nozzle control submodule 338;
Described condition judgement submodule 331 comprises identifying unit 334, notification unit 335 and diagnosis unit 336;
Described condition judgement submodule 331, the original fuel injection signal 312 that pedal position information, cooling-water temperature sensor 322, air inlet pressure sensor 323, engine rotation speed sensor 324, intake air temperature sensor 325, supply voltage acquisition module 326 and the diesel engine ECU module 310 that reception accelerator pedal position sensor 321 sends provided, judge by described information that motor is in and to mix when burning operating mode that notice diesel fuel nozzle control submodule 337 and gas nozzle submodule 338 are limit oil and jet respectively; Can mix when burning operating mode when not being in, not limit oil and jet, directly with original fuel injection signal to diesel fuel nozzle 341.
Described diesel fuel nozzle control submodule 337, the notice that accepting state decision sub-module 331 sends, the injection time of calculating diesel fuel nozzle 341 sends to diesel fuel nozzle 341 with described injection time control signal;
Described gas nozzle control submodule 338, the notice that accepting state decision sub-module 331 sends calculates the jet time of gas nozzle 342, and described jet time control signal is sent to gas nozzle 342;
Described notification unit 335 is when receiving when being in the information of mixing the burning state notice diesel fuel nozzle control submodule 337 and gas nozzle control submodule 338; Mix when burning status information when receiving not to be in, fuel injection signal is not controlled;
Described nozzle module 340 comprises diesel fuel nozzle 341 and gas nozzle 342, sends oily control signal of limit and combustion gas control signal according to controller module 330, carries out oil spout and jet respectively.
Need to prove, the embodiment of the invention can be applied to the system of various blending gas of electric-control diesel engine, the diesel engine type that is suitable for comprises employing electrically-controlled pump nozzle, electronically controlled unit pump and the isostructural motor of electric-controlled co-rail, and the combustion gas type that can mix burning comprises rock gas, liquefied petroleum gas (LPG) etc.
By as seen above-mentioned, the method and apparatus of the electronic controlled diesel blending gas control in the embodiment of the invention, by limiting original injection time, and fill up engine power with combustion gas, make motor under the prerequisite that does not influence power character, reduce fuel cost, reduce discharging, and this device construction is simple, and it is convenient to realize.
Understand easily, the above is preferred embodiment of the present invention only, is not to be used to limit spirit of the present invention and protection domain, and equivalent variations that any those of ordinary skill in the art made or replacement all should be considered as being encompassed within protection scope of the present invention.
Claims (12)
1. the controlling method of a blending gas of electric-control diesel engine, it is characterized in that, comprising: oil gas switches soft rapidly, gas quantity and diesel oil amount accuracy control method, bad working environments Learning Control Method, has the fault diagnosis functions of tracing trouble and warning.
2. method according to claim 1, it is characterized in that, the controlling method of described blending gas of electric-control diesel engine is: the controlling method of rule-based control, with the position of engine speed and throttle position and deviation and suction pressure, intake temperature, water temperature size is rule condition, the control of blending gas of electric-control diesel engine is divided into the several Control module, and control accuracy height, adaptability are strong.
3. method according to claim 1 is characterized in that, described oil gas switches rapid soft method and is: before carrying out the oil gas switching, determine output quantity according to the parameter that motor is different at every turn, and adopt variable parameter PID control, real-time, transition is steady.
4. method according to claim 1, it is characterized in that, described gas quantity and diesel oil amount exact method are: gas quantity and oil mass all adopt the electric-controlled injection controlling method, and the characteristics of electric-controlled injection are exactly accurately to adjust the output quantity of fuel, have avoided the deviation in the control.
5. method according to claim 1, it is characterized in that, described bad working environments self-learning method is: in bad working environments such as transient working condition, high load working conditions, parameter with reference to motor, according to set control algorithm, can adjust the fuel output quantity in real time,, finish a self study at last with adjusted parameter write memory.
6. method according to claim 1; it is characterized in that; described diagnostic method is: each module all has the diagnostic method of oneself, and signals collecting is understood the magnitude of voltage of display abnormality, the unusual correlating markings of jet control circuit position 1, fuel injection pulsewidth control circuit fault employing software diagnosis or the like unusually.
7. the device of a blending gas of electric-control diesel engine is characterized in that, comprising: signal acquisition module, the collection of diesel injection amount and control module, rock gas are supplied with control module, microcontroller, CAN communication module, serial communication modular.
8. device according to claim 7, it is characterized in that described signal acquisition module comprises: the coherent signal collection of reflection such as throttle position collection, tach signal collection, suction pressure collection, cooling water temperature collection, intake temperature collection engine behavior.
9. device according to claim 7, it is characterized in that collection of described diesel injection amount and control module comprise: gather and handle the control signal of the diesel injection amount of motor, send ECU to, ECU controls the fuel injection quantity of motor according to the running state of present engine
10. device according to claim 7; it is characterized in that described rock gas is supplied with control module and comprised: the state that ECU is current according to motor, determine the output quantity of combustion gas; this module drives gas injector and diagnostic function is arranged, and carries out the effect that Current Control has the protection nozzle.
11. device according to claim 7 is characterized in that, described CAN communication module is used for receiving the signal of other control ECU in the car load, thereby according to the car load situation each controller of motor is made corresponding adjustment;
12. device according to claim 7 is characterized in that, described serial communication modular can be realized communicating by letter of PC and ECU, can realize program online modification and on-line monitoring function.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010117611A CN101761406A (en) | 2010-03-04 | 2010-03-04 | Method and device for controlling blending gas of electric-control diesel engine |
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| CN201010117611A CN101761406A (en) | 2010-03-04 | 2010-03-04 | Method and device for controlling blending gas of electric-control diesel engine |
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Cited By (7)
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| CN102767435A (en) * | 2012-07-25 | 2012-11-07 | 镇江恒驰科技有限公司 | Method for controlling diesel-alternative fuel engines by throttle position signal conversion |
| CN103016168A (en) * | 2011-09-22 | 2013-04-03 | 北京易控凌博汽车电子技术有限公司 | Diesel engine/natural gas dual-fuel engine electric control system |
| CN103091112A (en) * | 2013-01-31 | 2013-05-08 | 林惠堂 | Method and device of car emission fault detection and diagnosis based on fuzzy reasoning and self-learning |
| CN104005863A (en) * | 2014-05-22 | 2014-08-27 | 华南理工大学 | Diesel/natural gas active blending combustion electronic control system and method |
| CN107503855A (en) * | 2017-08-17 | 2017-12-22 | 中国第汽车股份有限公司 | The fuel quantity distribution computational methods of Diesel-CNG dual fuel engine |
| CN108194215A (en) * | 2017-12-27 | 2018-06-22 | 成都恩吉威汽车系统有限公司 | GDI engine fuel injector flexibility intervenes control device and control method |
| CN111677592A (en) * | 2020-05-21 | 2020-09-18 | 江苏大学 | Control system and method for single-cylinder diesel engine co-combustion of gaseous methanol fuel |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103016168A (en) * | 2011-09-22 | 2013-04-03 | 北京易控凌博汽车电子技术有限公司 | Diesel engine/natural gas dual-fuel engine electric control system |
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| CN103091112B (en) * | 2013-01-31 | 2015-04-01 | 林惠堂 | Method and device of car emission fault detection and diagnosis based on fuzzy reasoning and self-learning |
| CN104005863A (en) * | 2014-05-22 | 2014-08-27 | 华南理工大学 | Diesel/natural gas active blending combustion electronic control system and method |
| CN107503855A (en) * | 2017-08-17 | 2017-12-22 | 中国第汽车股份有限公司 | The fuel quantity distribution computational methods of Diesel-CNG dual fuel engine |
| CN108194215A (en) * | 2017-12-27 | 2018-06-22 | 成都恩吉威汽车系统有限公司 | GDI engine fuel injector flexibility intervenes control device and control method |
| CN111677592A (en) * | 2020-05-21 | 2020-09-18 | 江苏大学 | Control system and method for single-cylinder diesel engine co-combustion of gaseous methanol fuel |
| CN111677592B (en) * | 2020-05-21 | 2022-09-13 | 江苏大学 | Control system and method for single-cylinder diesel engine co-combustion of gaseous methanol fuel |
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