CN205559086U - Dual -fuel engine system - Google Patents
Dual -fuel engine system Download PDFInfo
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- CN205559086U CN205559086U CN201620172713.0U CN201620172713U CN205559086U CN 205559086 U CN205559086 U CN 205559086U CN 201620172713 U CN201620172713 U CN 201620172713U CN 205559086 U CN205559086 U CN 205559086U
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- engine
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- pipeline
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Abstract
The utility model relates to a dual -fuel engine system, it includes the engine body, the engine intake manifold way, the engine exhaust pipe way, engine oil feeding system and engine control unit, engine oil feeding system is including installing the sprayer on the engine oil inlet, the sprayer is connected through supplying the oil pipe way and firing the oil storage device, supply oil pipe to install the injection pump on the road, be connected with electronic governor on the injection pump, electronic governor's control end and engine control unit electricity are connected, engine intake manifold installs the gas mixing ware on the road, another import of gas mixing ware is connected with gas storage device through gas pipeline, the last combustion -gas stream metered valve of installing of gas pipeline, the control end and the engine control unit electricity of combustion -gas stream metered valve are connected, the electricity is connected with the switching device who is used for the control engine operation on the engine control unit. This engine system simple structure, it is convenient to reform transform, and the operation is stable, can improve engine performance by a wide margin.
Description
Technical field
This utility model relates to engine art, a kind of dual fuel engine system.
Background technology
Engine system generally comprises engine body, engine charge pipeline, Engine exhaust pipeline, engine fuel system and control unit of engine.The oil supply system of generating Diesel engine generally comprises fuel injector, injection pump and electron speed regulator, injection pump is connected with electron speed regulator, fuel injector is connected with fuel oil storage device by oil feed line, injection pump is arranged on oil feed line, and the control end of electron speed regulator electrically connects with control unit of engine.Along with Abgasgesetz increasingly stringent, the pure diesel generating set of mechanical pump joined by electron speed regulator the most gradually can not meet current emission regulation demands, is faced with the possibility being eliminated.Meanwhile, although the high pressure common rail electric-controlled injection system on vehicle diesel engine can meet the emission request of generating set, but oil consumption is too much, and operating cost is higher.Energy-saving and emission-reduction become engine art and are badly in need of solving the technical problem that.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of dual fuel engine system, and this system structure is simple, and transformation is convenient, stable, and engine performance can be greatly improved.
For solving above-mentioned technical problem, dual fuel engine system of the present utility model includes engine body, engine charge pipeline, Engine exhaust pipeline, engine fuel system and control unit of engine, engine fuel system includes the fuel injector being arranged on engine oil inlet mouth, fuel injector is connected with fuel oil storage device by oil feed line, injection pump is installed on oil feed line, connect on injection pump and have electron speed regulator, the control end of electron speed regulator electrically connects with control unit of engine, it is structurally characterized in that on described engine charge pipeline and is provided with gas mixer, another import of gas mixer is connected with combustion gas storage device by fuel gas pipeline, gas flow valve is installed on fuel gas pipeline, the control end of gas flow valve electrically connects with control unit of engine；Electrically connect useful in controlling the switching device that electromotor runs on control unit of engine.
Be provided with on described engine body electrically connect with control unit of engine speed probe, detonation sensor, power sensor.
The exhaust gas temperature sensor electrically connected with control unit of engine is installed in described Engine exhaust pipeline.
On described engine charge pipeline, the air inlet pressure sensor electrically connected with control unit of engine is installed.
The rack position sensor electrically connected with control unit of engine is installed on described injection pump.
Described switching device includes fuel mode switching switch and rated speed/idling switching switch.
Described engine system also includes the turbocharger being arranged in engine charge pipeline and Engine exhaust pipeline.
On described engine charge pipeline, charge air cooler is installed.
Engine system of the present utility model need not primary motivation is carried out extra transformation, simply the fuel oil supply system of primary motivation is replaced with fuel oil combustion gas dual fuel supply system, wherein control unit of engine controls to enter the gas quantity of electromotor according to the aperture size that each different operating points control gas flow valve, combustion gas is not involved in speed governing, electromotor still controls fuel oil by speed regulator and mechanical oil pump and regulates engine speed, this systematic difference can effectively improve emission level and the fuel economy of electromotor, it is applicable to the transformation to former oil-fired power generating unit, or again mate new fuel oil combustion gas dual fuel engine, transformation, coupling application and maintenance cost are low.
Accompanying drawing explanation
With detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings:
Fig. 1 is overall structure schematic diagram of the present utility model；
Fig. 2 is control principle schematic block diagram of the present utility model.
Detailed description of the invention
nullReferring to the drawings，Dual fuel engine system of the present utility model includes engine body 1、Engine charge pipeline 2、Engine exhaust pipeline 3、Engine fuel system and control unit of engine ECU，Engine fuel system includes the fuel injector 4 being arranged on engine oil inlet mouth，Fuel injector 4 is connected with fuel oil storage device 61 by oil feed line 5，Injection pump 6 is installed on oil feed line 5，Connect on injection pump 6 and have electron speed regulator 7，The control end of electron speed regulator 7 electrically connects with control unit of engine ECU，Gas mixer 8 is installed on engine charge pipeline 2，Another import of gas mixer 8 is connected with combustion gas storage device 10 by fuel gas pipeline 9，Gas flow valve 11 is installed on fuel gas pipeline 9，The control end of gas flow valve 11 electrically connects with control unit of engine ECU；Electrically connect useful in controlling the switching device 12 that electromotor runs on control unit of engine ECU.Wherein, switching device 12 includes fuel mode switching switch and rated speed/idling switching switch.
Be provided with on engine body 1 electrically connect with control unit of engine ECU speed probe 13, detonation sensor 14, power sensor 15.The exhaust gas temperature sensor 16 electrically connected with control unit of engine ECU is installed in Engine exhaust pipeline 2.The air inlet pressure sensor 17 electrically connected with control unit of engine ECU is installed on engine charge pipeline 2.The rack position sensor 18 electrically connected with control unit of engine ECU is installed on injection pump 6.In addition to engine rotational speed signal, control unit of engine ECU gathers other signal multiple, thus the operating condition of electromotor can be carried out comprehensive descision.Other signal includes boost pressure signal, injection pump rack position signalling, exhaust temperature signal, detonation signal, gas flow control valve actual position signal and power signal etc..
This engine system can increase joins turbocharging function, as it can be seen, this engine system also includes the turbocharger 19 being arranged in engine charge pipeline 2 and Engine exhaust pipeline 3.Charge air cooler 20 is installed on engine charge pipeline 2.Coordinated the output of common raising electromotor by turbocharger 19 with charge air cooler 20, and the discharge of electromotor can be improved.
This engine system mainly have pure fuel oil and fuel oil two kinds of operational modes of natural gas double-fuel, therefore, fuel mode switching switch includes pure fuel oil operational mode and two gears of dual fuel.When switch is switched to pure fuel oil operational mode, electromotor is always with pure fuel oil mode operation.When switch is switched to dual fuel, engine start, when electromotor is in idling or Smaller load runs, gas flow valve cuts out, electromotor uses pure fuel oil mode operation, after engine load increases to a certain degree, control unit of engine ECU controls gas flow valve and opens, and combustion gas enters cylinder after mixing with air and participates in work by combustion.
Wherein, the operation principle of dual fuel mode is as follows: gas supply system is completely independent with fuel oil supply system, when combustion gas entrance cylinder starts to do work, the part that fuel oil is done work is substituted by combustion gas, electromotor has only to less fuel oil just can maintain identical rotating speed and load, and therefore speed regulator can reduce throttle tooth bar automatically；When combustion gas is exited, amount of fuel is increased in order to maintain identical rotating speed and load to be accomplished by, speed regulator increases throttle tooth bar the most automatically, when load changes occur, first it is that fuel oil changes rapidly to maintain rotating speed, then control unit of engine ECU is according to rotating speed and the change of load signal, the valve opening controlling gas flow valve 11 gradually arrives setting position, while gas flow changes, speed regulator also makes the amount of fuel oil change at control throttle tooth bar, electromotor is made to maintain a stable duty, so the dynamic characteristic of electromotor remains as the characteristic of electromotor, load can well be met and change working condition requirement frequently.
The supply input value that mainly control unit of engine controls as speed closed loop according to the difference of setting speed and actual speed of fuel oil, control logic through the PID speed closed loop within control unit of engine ECU and obtain the driving signal of electron speed regulator, and control the rack position of high-pressure injection pump with this, thus reach to control the fuel supply volume of electromotor, make engine speed maintain all the time near setting speed.
The supply of combustion gas fuel oil double fuel switching switch get to and carry out under dual fuel, mainly control unit of engine ECU is using the difference of the demand aperture of gas flow valve and actual aperture as the input value of gas flow aperture closed loop control, the driving signal of gas flow is exported through the PID closed loop control within control unit of engine ECU, and drive gas flow with this, make gas flow reach the aperture of demand under current working, thus control the fuel gas supply amount of electromotor.
Wherein, in order to make electromotor operate in safely and efficiently under working condition, this double fuel supply control system can the row of apolegamy temperature signal and detonation signal etc., control unit of engine ECU can reasonably control the air inflow of fuel oil and natural gas according to row's temperature signal or detonation signal when carrying out double fuel and controlling.
Summary, this engine system, owing to not transforming the oil supply system of primary motivation, simply adds gas control system in gas handling system, transformation and maintenance cost are low, it is simple to install；In this engine system, pure fuel oil operational mode and dual fuel can carry out free switching according to mode switch, and the supply of combustion gas does not affect the debugging characteristic of electromotor, and transient condition is still quickly responded by electronics debugging system；This engine system configures and the different demands of client according to the different of electromotor, can introduce different control signals, make under the safe and reliable working condition that electromotor runs.
In sum, this utility model is not limited to above-mentioned detailed description of the invention.Those skilled in the art, on the premise of without departing from spirit and scope of the present utility model, can do some changes and modification.Protection domain of the present utility model should be as the criterion with claim of the present utility model.
Claims (8)
- null1. a dual fuel engine system，Including engine body (1)、Engine charge pipeline (2)、Engine exhaust pipeline (3)、Engine fuel system and control unit of engine (ECU)，Engine fuel system includes the fuel injector (4) being arranged on engine oil inlet mouth，Fuel injector (4) is connected with fuel oil storage device (61) by oil feed line (5)，Injection pump (6) is installed on oil feed line (5)，The upper connection of injection pump (6) has electron speed regulator (7)，The control end of electron speed regulator (7) electrically connects with control unit of engine (ECU)，It is characterized in that, on described engine charge pipeline (2), gas mixer (8) is installed，Another import of gas mixer (8) is connected with combustion gas storage device (10) by fuel gas pipeline (9)，Gas flow valve (11) is installed on fuel gas pipeline (9)，The control end of gas flow valve (11) electrically connects with control unit of engine (ECU)；The upper electrical connection of control unit of engine (ECU) is useful in controlling the switching device (12) that electromotor runs.
- 2. dual fuel engine system as claimed in claim 1, it is characterized in that being provided with on described engine body (1) electrically connect with control unit of engine (ECU) speed probe (13), detonation sensor (14), power sensor (15).
- 3. dual fuel engine system as claimed in claim 1, is characterized in that being provided with the exhaust gas temperature sensor (16) electrically connected with control unit of engine (ECU) in described Engine exhaust pipeline (2).
- 4. dual fuel engine system as claimed in claim 1, is characterized in that being provided with the air inlet pressure sensor (17) electrically connected with control unit of engine (ECU) on described engine charge pipeline (2).
- 5. dual fuel engine system as claimed in claim 1, is characterized in that being provided with the rack position sensor (18) electrically connected with control unit of engine (ECU) on described injection pump (6).
- 6. dual fuel engine system as claimed in claim 1, is characterized in that described switching device (12) includes fuel mode switching switch and rated speed/idling switching switch.
- 7. the dual fuel engine system as according to any one of claim 1-6, is characterized in that described engine system also includes the turbocharger (19) being arranged in engine charge pipeline (2) and Engine exhaust pipeline (3).
- 8. dual fuel engine system as claimed in claim 7, is characterized in that being provided with charge air cooler (20) on described engine charge pipeline (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620172713.0U CN205559086U (en) | 2016-03-08 | 2016-03-08 | Dual -fuel engine system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620172713.0U CN205559086U (en) | 2016-03-08 | 2016-03-08 | Dual -fuel engine system |
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| Publication Number | Publication Date |
|---|---|
| CN205559086U true CN205559086U (en) | 2016-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201620172713.0U Active CN205559086U (en) | 2016-03-08 | 2016-03-08 | Dual -fuel engine system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542597A (en) * | 2017-09-25 | 2018-01-05 | 百发动力（无锡）有限公司 | It is a kind of to realize diesel oil and the generating set of liquefied natural gas double fuel conversion |
| CN109812356A (en) * | 2018-12-19 | 2019-05-28 | 潍柴动力股份有限公司 | Dual fuel injection system and dual fuel engine with it |
| CN111120098A (en) * | 2020-03-31 | 2020-05-08 | 潍柴重机股份有限公司 | Dual-fuel mode display and communication method and system |
-
2016
- 2016-03-08 CN CN201620172713.0U patent/CN205559086U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542597A (en) * | 2017-09-25 | 2018-01-05 | 百发动力（无锡）有限公司 | It is a kind of to realize diesel oil and the generating set of liquefied natural gas double fuel conversion |
| CN107542597B (en) * | 2017-09-25 | 2023-05-12 | 百发动力（无锡）有限公司 | Generating set capable of realizing dual-fuel conversion of diesel oil and liquefied natural gas |
| CN109812356A (en) * | 2018-12-19 | 2019-05-28 | 潍柴动力股份有限公司 | Dual fuel injection system and dual fuel engine with it |
| CN111120098A (en) * | 2020-03-31 | 2020-05-08 | 潍柴重机股份有限公司 | Dual-fuel mode display and communication method and system |
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