CN202140180U - Fuel gas supply control device for duel fuel engine - Google Patents
Fuel gas supply control device for duel fuel engine Download PDFInfo
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- CN202140180U CN202140180U CN201120216684U CN201120216684U CN202140180U CN 202140180 U CN202140180 U CN 202140180U CN 201120216684 U CN201120216684 U CN 201120216684U CN 201120216684 U CN201120216684 U CN 201120216684U CN 202140180 U CN202140180 U CN 202140180U
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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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The utility model discloses a fuel gas supply control device for a duel fuel engine. A supply system of another fuel is additionally arranged on an original single-fuel engine; the adoption of two types of fuel is determined a driver; and the supply of the two types of fuel is controlled in a closed-loop mode, so that a reasonable air-fuel ratio of the air to the fuel is achieved and the economy, emission and practicality of the engine are ensured. Meanwhile, an electronic throttle valve device is adopted; the defects of a mechanical accelerator can be overcome; the fuel gas supply control device for the duel fuel engine is a novel electronic throttle valve control system which has strong adaptability, high precision, small overshooting and short regulating time and has an initial position learning function and a voltage compensating function; a fault diagnosis function is added, so that the fuel gas supply control device for the duel fuel engine is safer and more efficient to use.
Description
Technical field
The utility model relates to the gas supply of dual-fuel engine control system, is specifically related to a kind of gas supply of dual-fuel engine control gear.
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 and energy saving; Reduce the pollution of vehicle exhaust, use combustion gas (rock gas, liquid gas) as main automotive fuel to environment.Combustion gas has than the better fuel economy of diesel oil, and exhaust pollutant content is lower.
The utilization of on the bus in the most of city of China, having succeeded of combustion gas (rock gas, liquid gas) motor can be in China the Northeast, and only practical a kind of fuel but displays very big deficiency:
A. natural gas engine is the maximum gas engine of utilization on bus, and its utilization is not only because its economical and emission performance the more important thing is increasing of China's natural gas gas station, makes public transport company's aerating convenient.Regional northeastward; Because the influence of being transferred natural gas from the west to the east; The construction of natural gas filling station will lag behind the middle part and the southern area of China slightly, and what price was relative will be more expensive, and major part all adopts liquid gas so the public transport company of the Northeast seldom uses gas fuel.
B. adopting liquid gas is that a lot of benefits is arranged for the Northeast, better such as power performance, more has economically, and aerating is convenient.To winter, temperature there can be low to moderate subzero more than 40 degree even lower, and the superiority of liquid gas just can not embodied.Liquid gas is with the stored in form of liquid state in gas cylinder; Under the very low situation of ambient temperature, engine coolant does not have enough temperature to come the heating fluid gasification, makes liquid gas through evaporator the time; Still the state with liquid flows out; Cause with air mixing badly, start difficulty, even cause and to start.
Before this model utility was not successfully used, the public transport company in northeast adopted the mode that night, fixed point started to solve the difficult problem of startup in morning.
Know that by above there is defective in single-fuel engine area northeastward, can't satisfy the unification of economical, power character, practicability.
The model utility content
The utility model embodiment provides a kind of gas supply of dual-fuel engine control gear; Adopt the electronic throttle device; It can overcome the drawback of mechanical throttle; Be the novel electron air throttle control system that a kind of adaptive capacity is strong, precision is high, overshoot is little, initial position learning functionality and voltage compensating function are lacked and had to the adjusting time, also increased fault diagnosis functions, make its use safer, efficient.
For achieving the above object, the utility model embodiment's technological scheme is concrete to be realized as follows:
The utility model relates to the gas supply of dual-fuel engine control gear; Be included in to drive on the dial plate throw over switch is set; Throw over switch links to each other with controller module; Controller module respectively with the gas fuel supply system in solenoid valve link to each other with solenoid valve in the liquefied gas-delivering device, it is characterized in that comprising in the control gear outlet pipe oxygen concentration pick-up transducers, said oxygen concentration pick-up transducers links to each other with identifying unit in the controller module; Identifying unit links to each other with notification unit, and notification unit links to each other with liquid gas closed loop final controlling element with rock gas amount of feed closed loop executor module respectively.Which kind of fuel the judgment unit judges motor should use, and judged whether air fuel ratio has reached ideal value, and when being in chemically correct fuel, controller module will pass through notification unit, the closed loop final controlling element is not controlled; When judgement was not in chemically correct fuel, through calculating the stepping amount of closed loop final controlling element, controller module will pass through notification unit, the closed loop final controlling element is controlled, and then reached chemically correct fuel.In the described control gear of the utility model, adopt which kind of fuel to determine by driver's wish, and the supply of two kinds of fuel employing closed loop control, make air and fuel reach rational air fuel ratio, guaranteed the economical of motor, emission performance and practicability.
In a preferred implementation of the utility model; Also comprise engine rotation speed sensor, electronic throttle position transducer and air inlet pressure sensor in the described control gear; The sensor links to each other with identifying unit in the controller module, and identifying unit links to each other with the ignition advance angle control unit.The information of gathering engine speed and electronic throttle position and suction pressure is the operating mode for definite motor, from the bivariate table that calibrates, finding ignition advance angle,
In a preferred implementation of the utility model; Also comprise cooling-water temperature transmitter and intake air temperature sensor in the described control gear; The sensor links to each other with identifying unit in the controller module, and identifying unit links to each other with engine target speed closed loop controller module.The information of gathering coolant temperature and intake temperature is the desired value for definite idling operation engine speed, and when coolant temperature was low slightly, rotating speed of target was just higher; Rotating speed of target is carried out closed loop control; So that motor warming up as early as possible, reach the condition of driving, after coolant temperature raises; Rotating speed of target will decrease, to satisfy the Eco-power requirement of motor.
In a preferred implementation of the utility model; Described gas fuel supply system comprises rock gas combustion gas gas cylinder, pressure transducer, rock gas decompressor, rock gas closed loop final controlling element, the manual power valve of rock gas; Can be for motor provide stable source of the gas, the bleed pressure that it provided is stable, flow meets the requirements, temperature meets the requirements.
In a preferred implementation of the utility model; Described liquid gas supply system comprises the big gas cylinder of rock gas, the little gas cylinder of rock gas, filter, rock gas vaporizer, rock gas closed loop final controlling element, the manual power valve of rock gas; Can be for motor provide stable source of the gas, the bleed pressure that it provided is stable, flow meets the requirements, temperature meets the requirements.
In a preferred implementation of the utility model; Described control gear also comprises the CAN communication module; Described CAN communication module provides interface for realizing car load communication; Can receive the signal of other control of vehicle body ECU, and pass to the motor microcontroller, direct engine is made respective reaction.
In a preferred implementation of the utility model, described control gear also comprises serial communication modular, and described serial communication modular can replace the function of fever writes, can realize and the communicating by letter of PC, and realizes the online modification of program, is convenient to safeguard.
In a preferred implementation of the utility model; Described sensor links to each other with diagnostic module; Described diagnostic function; Can in time find the fault of motor and peripheral accessory, in time instruct and start to make corresponding action, and indicate the driver and conductor to make appropriate treatment measures with the mode of reporting to the police.
The controlling method of the utility model embodiment's this gas supply of dual-fuel engine and device; On the basis of original single-fuel engine, installed the supply system of another fuel additional; Under the prerequisite that does not influence power character, increased the economical and practicability of motor; Two kinds of closed loop control strategies that fuel all adopts to be carried out by the closed loop final controlling element have simultaneously increased the emission performance of motor.
Description of drawings
Fig. 1 is a gas supply of dual-fuel engine control system mechanical structure schematic representation among the utility model embodiment.
Fig. 2.Composition structural representation for gas supply of dual-fuel engine control gear among the utility model embodiment
Fig. 3 is a gas supply of dual-fuel engine controlling method schematic flow sheet among the utility model embodiment.
Embodiment
For the purpose, technological scheme and the advantage that make the utility model embodiment is clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to the utility model embodiment further explain.
Fig. 1 is a gas supply of dual-fuel engine control system mechanical structure schematic representation among the model utility embodiment, comprises the manual power valve of the little gas cylinder of the big gas cylinder of the manual power valve of CNG combustion gas gas cylinder group 101, baroceptor 102, CNG decompressor 103, CNG closed loop final controlling element 104, CNG 105, LPG pressurized machine 106, LPG 107, LPG 108, LPG filter 109, LPG vaporizer 110, LPG closed loop final controlling element 111, LPG 112, fuel gas mixture 113 etc.
The supply of rock gas is the same with conventional thinking, and promptly pressurized gas (2-20MPa) are through becoming low pressure gas (250-300KPa) behind the decompressor, and gas gets into the fuel supply system that mixer has formed CNG then.The fuel supply system of LPG is to accomplish after having the LPG pressurized machine with the big fuel cylinder supercharging of LPG.The big gas cylinder of LPG is pressed into the little gas cylinder of LPG through the supercharging of LPG pressurized machine with liquid gas, and liquid gas gets into filter and additional issue device through little gas cylinder, and then gets into the supply system that mixer has formed LPG.This set has been avoided LPG in the process of aerating, frequently to change adding pore, and get final product only need for the big gas cylinder aerating of LPG.
Fig. 2 is said gas supply of dual-fuel engine control structure schematic representation.
Comprise operating state information acquisition module 210, main controller module 220 and closed loop final controlling element control module 230.
Said operating state information acquisition module 210 is obtained the status information when judging the motor operation, and said status information is sent to controller module 220;
Said operating state information acquisition module 220 comprises: accelerator pedal position sensor 211, electronic throttle position transducer 212, air inlet pressure sensor 213; Intake air temperature sensor 214; Coolant temperature 215, engine rotation speed sensor 216, supply voltage collector 217; Oxygen signal sensor 218, fuel is selected collector 219.
Said accelerator pedal position sensor 211 obtains accelerator pedal position information and sends to controller module 220;
Said electronic throttle position transducer 212 obtains the electronic throttle position information and sends to controller module 220;
Said air inlet pressure sensor 213 obtains suction pressure information and sends to controller module 220;
Said intake air temperature sensor 214 is obtained intake temperature information and is sent to controller module 220;
Said cooling-water temperature sensor 215 obtains engine coolant temperature information and gives controller module 220;
Said engine rotation speed sensor 216 obtains engine speed information and sends to controller module 220;
Said supply voltage acquisition module 217 obtains supply voltage information and sends to controller module 220;
Said oxygen signal sensor 218 obtains in the outlet pipe oxygen concentration content and sends to controller module 220;
Said fuel is selected collector 219, obtains the information of utilizing which kind of fuel and sends to controller module 220;
Said controller module 220; Obtain the status information that engine operating state information acquisition module 210 sends; Judge which kind of fuel motor should use, and judge whether air fuel ratio has reached ideal value, when being in chemically correct fuel; Controller module 220 will pass through notification unit 223, the closed loop final controlling element is not controlled; When judgement was not in chemically correct fuel, through calculating the stepping amount of closed loop final controlling element, controller module 220 will pass through notification unit 223, the closed loop final controlling element is controlled, and then reached chemically correct fuel.
Said controller module 220 comprises: engine operating state decision sub-module 221, CNG closed loop executor module 225 and LPG closed loop executor module 226;
Said condition judgement submodule 221 comprises identifying unit 222, notification unit 223 and diagnosis unit 224;
Said condition judgement submodule 221 receives accelerator pedal position sensor 211, electronic throttle position transducer 212; Air inlet pressure sensor 213, intake air temperature sensor 214, coolant temperature 215; Engine rotation speed sensor 216, supply voltage collector 217, oxygen signal sensor 218; The signal that fuel selects collector 219 to be provided; Judge which kind of fuel that adopts by said information, whether motor is in the optimum state of chemically correct fuel, and then the corresponding closed loop final controlling element control module of notice is carried out corresponding action.
Said fault diagnosis module 224, the information of reception operating state information acquisition module 210 is judged whether each sensor of motor and collector break down, and is provided its corresponding measures.
Said CNG closed loop final controlling element control module 225 and LPG closed loop final controlling element control module 226, the notice that accepting state decision sub-module 221 is sent drives the closed loop final controlling element and carries out corresponding action.
Said notification unit 223, when receiving fuel when not arriving chemically correct fuel, notice closed loop final controlling element control module 225 and 226 when receiving when being in chemically correct fuel, is not controlled closed loop actuator driven module.
Said closed loop executor module 230 comprises CNG closed loop final controlling element 231, and LPG closed loop final controlling element 232 according to the stepping control signal that controller module 220 sends, carries out corresponding action.
Fig. 2 is the utility model embodiment control flow chart, comprising:
Step 301: double fuel ECU energising.This judgement is by the ignitor switch decision, and when switch was got to first grade, double fuel ECU tutorial light was bright.
Step 302: judgement is to adopt gas fuel or liquefied gas as fuel.This judgement be have driver's wish about, a throw over switch has been installed on driver's driving dial plate, can between rock gas and liquid gas, switch.Because rock gas is with the stored in form of gaseous state in gas cylinder; So through decompressor the time, just spray into suction tude with the state of gas without the coolant water temperature heating; And liquid gas is with the state storage of liquid, through decompressor the time, need heat with engine coolant.Morning northeastward is when starting, and the driver need forward the CNG pattern to transforming switch, treat that water temperature raises after, change the LPG pattern again over to.Liquid gas gasifies with regard to enough temperature are arranged, and then sprays into intake manifold with the form of gas through decompressor the time like this, and it is well mixed to get into mixed gas and air then.
Step 303: after control module judged to adopt CNG fuel, the CNG solenoid valve was opened, and the air pressure of several MPas even tens MPas is getting into admission line through the pressure that is decompressed to 250KPa behind the decompressor in the CNG gas cylinder group.
Step 304: when liquid temp to be cooled rose to 70 ° perhaps higher, the driver can go to the LPG pattern transforming switch, and the LPG solenoid valve is opened immediately, when liquid liquid gas is issued additional device in process, and the temperature rising, gasification becomes gas and sprays into admission line.When the LPG solenoid valve is opened, the CNG closed electromagnetic valve, the CNG decompressor quits work.
To sum up judge: which kind of fuel motor specifically uses is that wish by the driver determines.When temperature is very low, the temperature deficiency of engine coolant is so that LNG gasifaction just adopts CNG to start, and a period of time to be moved, coolant temperature can re-use liquid gas after rising.If when starting, ambient temperature is than higher, and the temperature of cooling liquid is enough to make liquid gas to gasify and burning smoothly, also can use liquid gas to start.
Step 305: gather the various information of motor, these information comprise: oxygen concentration information, engine speed, accelerator pedal position, electronic throttle position, coolant temperature, suction pressure, intake temperature, 24V voltage signal in the outlet pipe.The information of gathering oxygen concentration in the outlet pipe is whether the air fuel ratio of judging fuel has reached desirable requirement, and the closed loop final controlling element of institute's combustion fuel is carried out closed loop control; The information of gathering engine speed and electronic throttle position and suction pressure is in order to confirm the operating mode of motor, from the bivariate table that calibrates, to find ignition advance angle; The information of gathering coolant temperature and intake temperature is the desired value for definite idling operation engine speed, and when coolant temperature was low slightly, rotating speed of target was just higher; Rotating speed of target is carried out closed loop control; So that motor warming up as early as possible, reach the condition of driving, after coolant temperature raises; Rotating speed of target will decrease, to satisfy the Eco-power requirement of motor.
Step 306:CNG and LPG adopt the different ignition advance angle when burning; When ECU detects when using which kind of fuel; According to gathering the suction pressure and the engine speed information of coming in the step 305, from the two-dimension table that calibrates, find the ignition advance angle of this kind fuel.
Step 307: make to judge: 1., magnitude of voltage is higher according to the feedback voltage value of lambda sensor; 2., magnitude of voltage is on the low side; 3., magnitude of voltage changes within reasonable range.
Because the signal value taked of lambda sensor represent in the outlet pipe the poor of oxygen concentration in the oxygen concentration and atmosphere, thus for judge 1., bigger than normal as if value of feedback, represent that then oxygen concentration is very little in the outlet pipe, and then explain that the fuel ratio that sprays into is more that mixed gas is denseer; For judge 2., value of feedback is less than normal, oxygen concentration is very big in the expression outlet pipe, and then the fuel that explanation sprays into is very little, mixed gas is rarer; For judge 3., then fuel and Air mixing have reached desirable air fuel ratio.
To sum up judge: if the oxygen value of feedback is bigger than normal or less than normal, explain that all air fuel ratio does not reach rational ratio, need control closed loop final controlling element to carry out corresponding action to reach chemically correct fuel; If the oxygen value of feedback changes in suitable scope, explain that air fuel ratio has reached desirable requirement, need not to control again the closed loop final controlling element and move.
Step 308: the oxygen signal value of collection and the setting value in the control module compare, and to judge the dense partially or rare partially amount of air fuel ratio, from the map table that calibrates, find the stepping amount of closed loop final controlling element simultaneously.
To judging 1. in the step 307 that mixed gas is dense partially, need to reduce the air inflow of fuel, the closed loop final controlling element increases the stepping amount, simultaneously according to departure find the stepping amount size; 2. judge that to step 307 mixed gas is rare partially, need to increase the air inflow of fuel, the closed loop final controlling element reduces the stepping amount; 3. judge that to step 307 air fuel ratio has reached desirable requirement, need not again the stepping amount of closed loop final controlling element is changed.
Step 309: according to the increase of calculating in the step 308 or reduce the stepping amount of closed loop final controlling element, the closed loop final controlling element carries out corresponding action.Can reach the purpose of location through the pulse number of control closed loop final controlling element, the frequency of control impuls can reach the purpose of control closed loop final controlling element speed and acceleration, makes every effort to the closed loop final controlling element and reaches the target location in the short period of time.
Step 310: arrive in the process of target location at the closed loop final controlling element, control module is the action of execution in step 305 all the time, whether has reached desirable position with the stepping amount of judging the closed loop final controlling element.
Need to prove that the utility model embodiment can be applied to various double fuel electric-control motor system.Increase the gas fuel supply system, can effectively solve the problem that the Northeast starts difficulty, increased the practicability of motor; Increase liquefied gas-delivering device, effectively increase the power character of motor; Increase the closed loop final controlling element, limited increase the economical and emission performance of motor.
Understand easily; The above is merely the utility model preferred embodiment; Be not spirit and the protection domain that is used to limit the utility model, equivalent variations that any those of ordinary skill in the art made or replacement all should be regarded as being encompassed within the protection domain of the utility model.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention according to above-mentioned explanation.
Claims (8)
1. gas supply of dual-fuel engine control gear; Be included in to drive on the dial plate throw over switch is set; Throw over switch links to each other with controller module; Controller module respectively with the gas fuel supply system in solenoid valve link to each other with solenoid valve in the liquefied gas-delivering device, it is characterized in that comprising in the control gear outlet pipe oxygen concentration pick-up transducers, said oxygen concentration pick-up transducers links to each other with identifying unit in the controller module; Identifying unit links to each other with notification unit, and notification unit links to each other with liquid gas closed loop final controlling element with rock gas amount of feed closed loop executor module respectively.
2. control gear according to claim 1; It is characterized in that: also comprise engine rotation speed sensor, electronic throttle position transducer and air inlet pressure sensor in the control gear; The sensor links to each other with identifying unit in the controller module, and identifying unit links to each other with the ignition advance angle control unit.
3. control gear according to claim 1; It is characterized in that: also comprise cooling-water temperature transmitter and intake air temperature sensor in the control gear; The sensor links to each other with identifying unit in the controller module, and identifying unit links to each other with engine target speed closed loop controller module.
4. the described control gear of claim 1, it is characterized in that: described gas fuel supply system comprises rock gas combustion gas gas cylinder, pressure transducer, rock gas decompressor, rock gas closed loop final controlling element, the manual power valve of rock gas.
5. control gear according to claim 1 is characterized in that: described liquid gas supply system comprises the big gas cylinder of rock gas, the little gas cylinder of rock gas, filter, rock gas vaporizer, rock gas closed loop final controlling element, the manual power valve of rock gas.
6. device according to claim 1 is characterized in that: described control gear also comprises the CAN communication module.
7. device according to claim 1 is characterized in that: described control gear also comprises serial communication modular.
8. device according to claim 1 is characterized in that: described sensor links to each other with diagnostic module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120216684U CN202140180U (en) | 2011-06-24 | 2011-06-24 | Fuel gas supply control device for duel fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120216684U CN202140180U (en) | 2011-06-24 | 2011-06-24 | Fuel gas supply control device for duel fuel engine |
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| Publication Number | Publication Date |
|---|---|
| CN202140180U true CN202140180U (en) | 2012-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120216684U Expired - Fee Related CN202140180U (en) | 2011-06-24 | 2011-06-24 | Fuel gas supply control device for duel fuel engine |
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| CN (1) | CN202140180U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632430A (en) * | 2019-10-17 | 2019-12-31 | 潍柴西港新能源动力有限公司 | Test system and test method for simulating anti-backfire capability of throttle valve |
| US10746143B2 (en) | 2016-08-05 | 2020-08-18 | Ford Global Technologies, Llc | Internal combustion engine and method for operating an internal combustion engine |
-
2011
- 2011-06-24 CN CN201120216684U patent/CN202140180U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10746143B2 (en) | 2016-08-05 | 2020-08-18 | Ford Global Technologies, Llc | Internal combustion engine and method for operating an internal combustion engine |
| CN110632430A (en) * | 2019-10-17 | 2019-12-31 | 潍柴西港新能源动力有限公司 | Test system and test method for simulating anti-backfire capability of throttle valve |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20130624 |