CN103422972A - Cooling system used for gas fuel engine - Google Patents
Cooling system used for gas fuel engine Download PDFInfo
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- CN103422972A CN103422972A CN2012101511128A CN201210151112A CN103422972A CN 103422972 A CN103422972 A CN 103422972A CN 2012101511128 A CN2012101511128 A CN 2012101511128A CN 201210151112 A CN201210151112 A CN 201210151112A CN 103422972 A CN103422972 A CN 103422972A
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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
- Y02T10/12—Improving ICE efficiencies
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Abstract
Disclosed is a cooling system used for a gas fuel engine. The cooling system is a set of utensils used for improving a double-fuel engine, and comprises a liquid-cooling intercooler, a heat exchanger and a connecting pipe, the liquid-cooling intercooler is used for inputting air into the engine, the heat exchanger is connected with the intercooler, the connecting pipe is used for enabling the heat exchanger to be connected with a fuel tank so as to receive liquid fuel and used for enabling the heat exchanger to be connected with an engine manifold, and in the heat exchanger, cold liquefied natural gas fuel absorbs heat from the intercooler when the fuel is changed from liquid state into gas state. Using of two kinds of fuel is improved by adding a supplementary electronic control unit into an OEM (original equipment manufacturer) electronic control unit, and the supplementary electronic control unit detects engine parameters identical with the OEM unit and additionally measures open degree of a throttle valve, gas pressure and gas temperature to change a ratio of diesel oil to gas, so that when the engine idles, an ejector allows the gas to enter to enable a fuel mixture to be richer in the gas instead of the diesel oil. A set of multi-part utensils used for improving OEMCU operations are further introduced.
Description
Technical field
The present invention relates to the cooling of a kind of inlet air system for the internal-combustion engine of taking as the leading factor with gaseous fuel.
Background technique
The present invention adopts a kind of appropriate hydrocarbon gas, i.e. LNG Liquefied natural gas [LNG] or compressed natural gas [CNG].This appropriate hydrocarbon gas is injected in intake manifold, and is sent to motor, and it is controlled by engine control module [ECM] in motor.Therefore, the operator can benefit from the Economy of LNG or CNG fuel.Turbosupercharging is the standard of these motors.The compression that flows into air has increased its temperature, and has reduced its density.The temperature of inlet air is unrare over 70 degrees centigrade.Even insert the air-air interstage cooler, still be recorded to so hot degree, this is because interstage cooler is cooling by the air through them, and when vehicle queue or when static, the effect decline of interstage cooler.
Summary of the invention
Equipment of the present invention aspect provides the utensil of a set of motor for improvement of using gaseous fuel and interstage cooler, and it comprises: the liquid cooling interstage cooler, for air is inputed to motor; The heat exchanger be connected with interstage cooler, in this heat exchanger, when fuel becomes gaseous state from liquid state, cold Liquefied Natural Gas fuel absorbs heat from middle cooler; And connecting tube, for making heat exchanger be connected with fuel tank so as the receiving liquid fluid fuel with for making heat exchanger be connected with manifold.This cover utensil can comprise header and pump, for freezing mixture is circulated to interstage cooler from heat exchanger.
Use of the present invention provides by LNG Liquefied natural gas carrys out the cooling air that inputs to the motor that uses gaseous fuel.Another aspect of the present invention provides a kind of cooling system, and for supplementing the air-air interstage cooler of turbosupercharged engine, it comprises: for the cooler of turbosupercharging air; Cooling circuit for this cooler; Heat exchanger in cooling circuit; The liquid fuel inlet that leads to heat exchanger; Gaseous fuel outlet from heat exchanger to motor, therefore, liquid fuel can be used for the air of cooling turbine supercharging to the cooling capacity of the phase transformation of gas.
When large capacity motor running hours under large throttle opening, the cost of fuel is an important economic factor for the operator, and also pays close attention to the availability of fuel, particularly in remote districts.Preferably, motor can provide by the selection of fuel enough power, for example diesel oil or appropriate hydrocarbon gas.Even under most suitable ambient temperature, when diesel fuel temperature raise and or the air temperature that enters motor while raising, much large-sized diesel motor power can be reduced.
When motor uses the mixture of diesel oil and appropriate hydrocarbon gas, must change proportions of ingredients with optimum organization.Therefore motor will be drawn, and in the dynamometer test process, be measured, in order to determine the interior working value of whole rotating speed/loading range of motor.These parameters are as the data of ECU, the work of ECU control engine when moving by single-fuel, but the use of additional fuel is added in parameter, and need supplementary ECU.
A second aspect of the present invention provides a kind of double fuel multi-cylinder engine that can accept diesel oil and appropriate hydrocarbon gas fuel, and it has: the OEM electronic control unit, for controlling the performance of diesel injection device; Intake manifold, this intake manifold has a plurality of mouthfuls for entering appropriate hydrocarbon gas; Main heat exchanger, for being transformed into gaseous fuel by liquid hydrocarbon; The second heat exchanger, carry out cooling diesel fuel for the heat exchange by with Liquefied Hydrocarbon gas; A plurality of sensors, the engine parameter for detection of identical with the OEM electronic control unit, comprise throttle opening; Additional sensor for appropriate hydrocarbon gas pressure; Additional sensor for the appropriate hydrocarbon gas temperature; And supplementary electronic control unit, change the ratio of diesel oil and appropriate hydrocarbon gas according to above-mentioned parameter for responding throttle opening, therefore, when engine idle, sparger allows gas to enter, so that more be rich in appropriate hydrocarbon gas in fuel mixture, rather than diesel oil.
The parameter of supplementing the electronic control unit use can comprise air temperature, coolant temperature, gas pressure, gas temperature, diesel fuel temperature, lubricant pressure, lubricant temperature and diesel fuel temperature.
Air and the appropriate hydrocarbon gas flow in manifold can be controlled by mortor operated valve, and this mortor operated valve is controlled by supplementary electronic control unit again.
The performance of diesel injection device can be controlled by the array output of OEM and supplementary electronic control unit.
Diesel oil heat exchanger for cooling diesel oil can be connected with the cooling heat exchanger that enters the air of intake manifold.
Preferably, the diesel oil heat exchanger is positioned at the downstream for the heat exchanger of the cooling air that enters intake manifold.
It is identical that the independent suction tude of growing is assembled into the air quality that guarantees the different cylinders of introducing.This is for guaranteeing that the air-fuel ratio that keeps identical between cylinder is very important.
It is that mouth by sequence timing carries out gas inject that fuel is carried.This can reduce the gas discharging loss and in accelerating process, have good instantaneous air-fuel ratio to control in the valve overlap process.
The operator of vehicle can proofread and correct motor in order to accept diesel fuel by the nest with a plurality of parts.
The 3rd aspect of the present invention provides the utensil of a set of a plurality of parts, for converting the appropriate hydrocarbon gas motor to duel fuel engine, it comprises: the diesel fuel cooler, this diesel fuel cooler has pipeline, in order to make cooler inlet be connected with the diesel fuel source and make the cooler delivery outlet be connected with the diesel injection device; Manifold, this manifold has at least one gas port, for accepting appropriate hydrocarbon gas; Mortor operated valve in manifold, for regulating the manifold flow; Sensor for appropriate hydrocarbon gas pressure; Sensor for the appropriate hydrocarbon gas temperature; For the electronic control unit of the OEM electronic unit of make-up gas motor, so that the response throttle opening changes diesel oil in fuel mixture/appropriate hydrocarbon gas ratio.
Main heat exchanger is assembled into the heat that is used to the warm air of going out since the interstage cooler of original assembling liquid methane is transformed into to gaseous state.This makes inlet air reduce by 20 ~ 30 ℃, and this air supply cylinder, easily produce the weakness of detonation or pinking thereby reduced combustion process.Lower air temperature has reduced the rear temperature of compression, and level and smooth combustion process is provided.
Carry out cooling diesel fuel and utilize the LNG by main heat exchanger will guarantee that all LNG change its state to gaseous state with the heat exchanger of self, and the methane gas temperature is over 10 ℃.This reduces about 20 ~ 40 ℃ by diesel fuel temperature, and has reduced detonation or the pinking in the engine combustion process.More stable and level and smooth burning has occurred in the test demonstration.
The heat exchanger of these two installations allows double-fuel diesel/LNG motor to keep specified engine power under high ambient temperature.
When any fault appears in the control applied by supplementary ECU, the operator recovers to control by the OEM electronic unit.
The beneficial effect of the invention
1. can utilize two kinds of different fuel to alleviate the availability problem, especially in remote districts.
2. total fuel economy is improved.
The accompanying drawing explanation
Introduce embodiments of the invention below with reference to accompanying drawing, in accompanying drawing:
Fig. 1 is flow chart.
The view of the circuit version that Fig. 2 is Fig. 1, meaned the position of cooler of diesel.
Fig. 3 offers the engine electronic control unit of multi-cylinder diesel engine and the view of supplementary electronic control unit.
The table that Fig. 4 is the fuel ratio while being illustrated in 75% closure.
The table that Fig. 5 is the fuel mixture ratio while being illustrated in 25% closure.
Embodiment
With reference to accompanying drawing, the 141 truck engine (not shown)s with conventional turbocharger are supplied with the air of certain pressure by the interstage cooler 2 of air-air.Delivery pipe 4 guiding reach the pressurized air of 70 ~ 75 ℃ by water-cooled interstage cooler 6, then guided engine.Water-cooling cooler 6 is tubulose (500mm x 200mm), and before pressurized air arrives engine intake manifold, supplies with than the more cool air of low 20 ~ 25 ℃ of the pressurized air entered.
Water-fuel cooler 6 has cold coolant inlet 8 and hot coolant outlet 10, and this coolant outlet 10 makes freezing mixture be back to header 12.The content of header has produced the additional volume for system, so that this coolant pump heat exchanger 16 of starting filling coolant pump 14(is supplied with).This chamber is 900mm x 200mm, and holds the multi-channel heat exchanger element, and this multi-channel heat exchanger element receives the LNG Liquefied natural gas of-160 ℃ from adiabatic fuel tank (not shown).Contact and will make liquid rotating become gas form with the hot coolant of heat exchanger 16, at this moment, the gas of release leaves heat exchanger by exporting 18, through a pneumatic filter 20, and arrives regulator 22 before entering the sparger fuel manifold.
The Continuous Flow of leading to the liquid fuel of heat exchanger provides stable radiator, and it can, by about 20 ℃ of the coolant cools from middle cooler arrival, therefore increase the air density for motor.When truck upwards advances along lasting slope, increase the advantage of inlet air cooling clearly: by this additionally cooling, the power of truck engine will be maintained.The temperature of pressurized air, usually at 25 ~ 45 ℃, still can reach 70 ~ 75 ℃ under maximum load, and by additional heat exchanger 16, temperature is reduced between 45 ℃ and 55 ℃.
With reference now to Fig. 2,, air-air interstage cooler 2 provides precooled air to water cooling heat exchanger 6.The further cooling pressurized air that is blown into the inlet manifold (not shown) of heat exchanger 6, this pressurized air comes cooling by the heat exchange with LNG heat exchanger 16.LNG conduit 24 leaves heat exchanger 16, and enters cooler of diesel 26 and send fuel to filter 20.Pass through pipeline 28 through cooling diesel oil, in order to guide the jet pump other at motor into.
With reference now to Fig. 3,, offered by MANUFACTURER in the housing of ECU30 in being fixed on external engine of motor as original device, and be connected with engine components by electrical lead.In six cylinder engine, the lead-in wire 32 from ECU30 to each sparger is arranged, to change injector pulse.Lead-in wire 34 is connected to accelerator pedal sensor 36.ECU30 collects the input from synchro pick-up 38, reference sensor 40, diesel fuel temperature 42, oil temperature 44, oil pressure 46, coolant temperature 48, air temperature 50 and map sensor 52.These inputs allow unit 30 response throttle openings to change the pulse interval of sparger.
The intake manifold driven by line control air control shutter is assembled, and obtains instruction in order to keep maximum oil-poor air-fuel ratio from supplementing ECU54.Throttle control enters the air quantity of motor.When air-fuel ratio too oil-poor (non-air throttle control), the rock gas (methane) taken fire after the guiding diesel injection will be very slowly and burning by halves, so the greenhouse discharge raises and the fuel consumption increase.Methane is alternative than descending with diesel oil, and cost-benefit significantly reduces.By such throttle control is arranged, almost all can both utilize under load conditions methane to substitute (even in idling time).
Supplementary ECU54 need to, from the input of identical the sensor, come from the input of appropriate hydrocarbon gas pressure transducer 56 and gas temperature sensor 58 in addition in addition.ECU54 has the lead-in wire 60 that leads to six diesel injection devices, the lead-in wire 62 that leads to 6 gas ejectors 64 in manifold and the lead-in wire 66 that leads to servo meter (not shown), and this servo meter makes clack valve 68 rotations in manifold.Supplement ECU54 and be connected with sparger by sharing the lead-in wire used by ECU30, and, in a version, throw over switch allows the operator to cancel shared.All parameters are all controlled by supplementing ECU54, and ECU30 is monitor engine parameters only, and does not control.
When any problem occurring, original ECU30 will take over the control of motor, and move under full diesel fuel mode, and supplementary ECU54 closes.
With reference now to the table in accompanying drawing 4,, under 75% closure and 1500rpm, fuel mixture is 20% diesel oil, 80% gas.
With reference now to the table in accompanying drawing 5,, under 25% closure and 1500rpm, fuel mixture is 3% diesel oil and 97% gas.When vehicle, in its route during most of idling, this can save discharge.
It should be known that the word used in whole specification " comprises " should be interpreted as opening mode, that is, word " comprises " does not get rid of other additional element.
It should be known that in the situation that do not deviate from base attribute of the present invention and can carry out various modifications and/or additional to the present invention.These modifications and/or additional should be regarded as dropping on protection scope of the present invention within.
Claims (10)
1. the utensil of a set of motor for improvement of using gaseous fuel and interstage cooler comprises: the liquid cooling interstage cooler, for air is inputed to motor; The heat exchanger be connected with interstage cooler, in this heat exchanger, when fuel becomes gaseous state from liquid state, cold Liquefied Natural Gas fuel absorbs heat from middle cooler; And connecting tube, for making heat exchanger be connected with fuel tank so as the receiving liquid fluid fuel with for making heat exchanger be connected with manifold.
2. a cooling system is for supplementing the air-air interstage cooler of turbosupercharged engine, and it comprises: for the cooler of turbosupercharging air; Cooling circuit for this cooler; Heat exchanger in cooling circuit; The liquid fuel inlet that leads to heat exchanger; Gaseous fuel outlet from heat exchanger to motor, therefore, liquid fuel can be used for the air of cooling turbine supercharging to the cooling capacity of the phase transformation of gas.
3. the double fuel multi-cylinder engine that can accept diesel oil and appropriate hydrocarbon gas fuel has: the OEM electronic control unit, for controlling the performance of diesel injection device; Intake manifold, this intake manifold has a plurality of mouthfuls for entering appropriate hydrocarbon gas; Main heat exchanger, for being transformed into gaseous fuel by liquid hydrocarbon; The second heat exchanger, carry out cooling diesel fuel for the heat exchange by with Liquefied Hydrocarbon gas; A plurality of sensors, the engine parameter for detection of identical with the OEM electronic control unit, comprise throttle opening; Additional sensor for appropriate hydrocarbon gas pressure; Additional sensor for the appropriate hydrocarbon gas temperature; And supplementary electronic control unit, change the ratio of diesel oil and appropriate hydrocarbon gas according to above-mentioned parameter for responding throttle opening, therefore, when engine idle, sparger allows gas to enter, so that more be rich in appropriate hydrocarbon gas in fuel mixture, rather than diesel oil.
4. duel fuel engine according to claim 3, wherein: supplementing the parameter that electronic control unit uses is air temperature, coolant temperature, gas pressure, gas temperature, diesel fuel temperature, lubricant pressure, lubricant temperature and diesel fuel temperature.
5. according to the described duel fuel engine of claim 3 or 4, wherein: air and the appropriate hydrocarbon gas flow in manifold is controlled by mortor operated valve, and this mortor operated valve is controlled by supplementary electronic control unit again.
6. according to the described duel fuel engine of any one in claim 3-5, wherein: the performance of diesel injection device is controlled by the array output of OEM and supplementary electronic control unit.
7. according to the described duel fuel engine of any one in claim 3-6, wherein: the diesel oil heat exchanger for cooling diesel oil is connected with the cooling heat exchanger that enters the air of intake manifold.
8. duel fuel engine according to claim 7, wherein: the diesel oil heat exchanger is positioned at the downstream for the heat exchanger of the cooling air that enters intake manifold.
9. according to the described duel fuel engine of any one in claim 1-8, wherein: the capacity of motor is 2.5-13l.
10. the utensil of a set of a plurality of parts is for converting the appropriate hydrocarbon gas motor to duel fuel engine, it comprises: the diesel fuel cooler, this diesel fuel cooler has pipeline, in order to make cooler inlet be connected with the diesel fuel source and make the cooler delivery outlet be connected with the diesel injection device; Manifold, this manifold has at least one gas port, for accepting appropriate hydrocarbon gas; Mortor operated valve in manifold, for regulating the manifold flow; Sensor for appropriate hydrocarbon gas pressure; Sensor for the appropriate hydrocarbon gas temperature; For the electronic control unit of the OEM electronic unit of make-up gas motor, so that the response throttle opening changes diesel oil in fuel mixture/appropriate hydrocarbon gas ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101511128A CN103422972A (en) | 2012-05-16 | 2012-05-16 | Cooling system used for gas fuel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101511128A CN103422972A (en) | 2012-05-16 | 2012-05-16 | Cooling system used for gas fuel engine |
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| CN103422972A true CN103422972A (en) | 2013-12-04 |
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| CN2012101511128A Pending CN103422972A (en) | 2012-05-16 | 2012-05-16 | Cooling system used for gas fuel engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736125A (en) * | 2016-03-17 | 2016-07-06 | 潍柴动力股份有限公司 | Air inlet temperature control system and control method of engine |
| CN106593704A (en) * | 2017-01-12 | 2017-04-26 | 泰安鼎鑫冷却器有限公司 | Low-energy-consumption automobile fuel oil heating system |
| CN107939510A (en) * | 2017-11-29 | 2018-04-20 | 潍柴动力股份有限公司 | Cold control system and control method in a kind of diesel engine |
| CN109915266A (en) * | 2019-04-26 | 2019-06-21 | 上海海事大学 | A kind of dual-fuel engine combustion system peculiar to vessel and method |
-
2012
- 2012-05-16 CN CN2012101511128A patent/CN103422972A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736125A (en) * | 2016-03-17 | 2016-07-06 | 潍柴动力股份有限公司 | Air inlet temperature control system and control method of engine |
| CN106593704A (en) * | 2017-01-12 | 2017-04-26 | 泰安鼎鑫冷却器有限公司 | Low-energy-consumption automobile fuel oil heating system |
| CN107939510A (en) * | 2017-11-29 | 2018-04-20 | 潍柴动力股份有限公司 | Cold control system and control method in a kind of diesel engine |
| CN107939510B (en) * | 2017-11-29 | 2020-06-02 | 潍柴动力股份有限公司 | Inter-cooling control system and control method of diesel engine |
| CN109915266A (en) * | 2019-04-26 | 2019-06-21 | 上海海事大学 | A kind of dual-fuel engine combustion system peculiar to vessel and method |
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Application publication date: 20131204 |