CN102242668A - Dynamic air supplying device of turbocharged diesel engine - Google Patents
Dynamic air supplying device of turbocharged diesel engine Download PDFInfo
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- CN102242668A CN102242668A CN2011101658541A CN201110165854A CN102242668A CN 102242668 A CN102242668 A CN 102242668A CN 2011101658541 A CN2011101658541 A CN 2011101658541A CN 201110165854 A CN201110165854 A CN 201110165854A CN 102242668 A CN102242668 A CN 102242668A
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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
Abstract
The invention relates to a dynamic air supplying device of a turbocharged diesel engine. The device comprises a main turbocharger connected with a waste gas exhaust pipe of the engine. An auxiliary turbocharger connected with the main turbocharger in series is also arranged on the waste gas exhaust pipe of the engine. The auxiliary turbocharger comprises an auxiliary turbine and an auxiliary booster, which are connected coaxially. An air outlet pipe of the auxiliary booster is connected with an air inlet manifold of the engine through an air storage tank. An electric by-pass valve is installed on the auxiliary turbine in parallel. An electric air supplying valve is arranged between the air storage tank and the air inlet manifold of the engine. By adopting the dynamic air supplying device disclosed by the invention, air can be supplied in time before the air-fuel ratio of the engine is out of balance; after the engine enters a normal working state, the dynamic air supplying device exits timely; power and electric resources of vehicles are not used; and adverse effects on the vehicles cannot be resulted.
Description
Technical field
The present invention relates to a kind of engine charge making-up air device, the dynamic making-up air device of especially a kind of turbo-charging diesel motor.
Background technique
For solving convenient trip of city dweller and urban road congestion problem, urban mass-transit system is generally first developed in each big and medium-sized cities.Along with the development of urban mass-transit system, the tail gas pollution of public transit vehicle and energy consumption more and more cause the concern of society, and this also is related to the image in city simultaneously.Except that subway and track traffic, each city attempts generally adopting that low emission and zero pollutes such as vehicle that uses rock gas and electric vehicle etc.However, the power system of urban public traffic vehicles, still based on diesel engine, and public transit vehicle is started to walk, the phenomenon of acceleration over-emitting black exhaust is very general.Not only polluted environment, wasted the energy, returned " city business card " and cover with a slice shade.
Public transit vehicle starting, acceleration over-emitting black exhaust are not the problem of diesel engine to a great extent.Under declared working condition, the diesel engine that designs now, makes can satisfy emission request, at least can " over-emitting black exhaust ".Cause the immediate cause of over-emitting black exhaust, be necessary frequent starting, the operating conditions of acceleration and the hysteresis characteristic of gas handling system of public transit vehicle, make that " air fuel ratio " (entering the air of motor and the ratio of fuel oil) of motor is seriously unbalance, the essence of over-emitting black exhaust is that burning is insufficient, cause the burning bad have two kinds may: air inlet very little or fuel feeding undesired, what obviously, we discussed belongs to the former.
Yet motor tonifying Qi technology is not any new technology, before exhaust-gas turbocharger invention, and old brand industrial technology developed countries such as America and Europe this technology that just begins one's study, exhaust turbine pressuring technology continues into the present as outstanding person wherein.Because the high speed development of Modern Manufacturing Technology, make with cheaper price manufacturing high speed, high efficiency, high pressure ratio even the variable cross section exhaust-gas turbocharger become a reality, just make it surplus nearly ten, be applied in year.Reflection lags behind and singly increases the dynamic range features of limited at turbocharging technology, produced the combination supercharging, as: engine driven supercharging+exhaust gas turbocharge, electronic supercharging, electronic supercharging+exhaust gas turbocharge etc., the dynamic range with motor is complementary as far as possible, has obtained suitable effect.But quicken moment (because turbosupercharger lags behind " deficency " that cause) tonifying Qi technology for motor, industry does not have final conclusion always, and main cause may be acceleration mode proportion in engine operation too little and relevant " value " problem.
Summary of the invention
The technical problem to be solved in the present invention is: propose a kind of can be before motor " air fuel ratio " be unbalance, in time replenish air inlet; After motor enters normal working, withdraw from the dynamic making-up air device of turbo-charging diesel motor in good time.
The technical solution adopted in the present invention is: the dynamic making-up air device of a kind of turbo-charging diesel motor, comprise the main turbosupercharger that is connected with the engine exhaust outlet pipe, also be provided with the auxilliary turbosupercharger of connecting on the described engine exhaust outlet pipe with main turbosupercharger; Described auxilliary turbosupercharger comprises coaxial continuous auxiliary turbine and auxilliary pressurized machine, and the steam outlet pipe of described auxilliary pressurized machine is connected with engine intake manifold by gas holder; Be installed in parallel electronic bypass valve on the described auxiliary turbine; Be provided with electronic aeration valve between described gas holder and the engine intake manifold.
Further, in order not need extra energy resource supply, also do not consume vehicle-mounted electric weight, auxilliary turbosupercharger of the present invention is gas holder inflation by exhaust gas drive when engine idle.
The present invention also comprises central unit, and described central unit is gathered gas pedal acceleration/position signal, Vehicle Speed signal, engine rotational speed signal, gas holder pressure signal, gearbox gear signal and engine ignition switch signal respectively by a plurality of sensors; And by to the unlatching of electronic bypass valve of the analysis and Control of above-mentioned signal and electronic aeration valve or close.Can guarantee that like this this device is operated in rational state.
Again further, in order be better not cause the waste of the energy, on the steam outlet pipe of auxilliary pressurized machine of the present invention, the place, air outlet of closely auxilliary pressurized machine is provided with check valve to the gas holder inflation.
The gas holder pressure gauge of measuring and showing gas holder pressure is installed on the gas holder of the present invention.Can clearly detect and show the force value in the gas holder, thereby better grasp the time of opening bypass valve.
The steam outlet pipe of auxiliary turbine of the present invention is provided with first order baffler and second level baffler, the noise that is produced when being used to reduce exhaust emissions.
Working principle of the present invention is: utilize a low power exhaust-gas turbocharger, promptly auxilliary turbosupercharger when engine idle, utilizes engine exhaust to drive, and it is inflated to gas holder.The moment of engine start or acceleration, open aeration valve, to the engine intake manifold tonifying Qi, suitably proofread and correct the air fuel ratio imbalance state.When engine speed reaches certain value, main turbosupercharger can proper functioning after, open bypass valve when closing aeration valve, air compensating system withdraws from, motor enters normal working.In all processes, control unit is tightly monitored accelerator pedal signal, engine rotational speed signal and gas holder air pressure signal etc., controls the keying of aeration valve and the switch of bypass valve etc. in good time, guarantees that whole device is operated in rational state.
The invention has the beneficial effects as follows: 1, can before motor " air fuel ratio " is unbalance, in time replenish air inlet.After motor enters normal working, withdraw from good time, and do not use the power and the electric power resource of vehicle, can not produce harmful effect vehicle; To such an extent as to 2, can improve and eliminate the deficency phenomenon that motor quickens moment fully, eliminate " over-emitting black exhaust " by improving fuel combustion conditions, can effectively reduce exhaust pollution, simultaneously can also reduce oil consumption, have good social benefit and certain economic benefits, being particularly suitable for urban mass-transit system is the vehicle of fuel with diesel oil.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation block diagram of the preferred embodiments of the present invention;
Fig. 2 is a structural principle block diagram of the present invention;
Among the figure: 1, suction tude; 3, gas exhaust manifold; 4, main turbine; 5, main pressurized machine; 7, electronic bypass valve; 8, auxiliary turbine; 9, auxilliary pressurized machine; 11～12, check valve; 13, low pressure gasholder; 14, electronic aeration valve; 15, intake manifold; 16, gas holder pressure gauge; 17, first order baffler; 18, second level baffler.
Embodiment
The present invention is further detailed explanation with preferred embodiment in conjunction with the accompanying drawings now.These accompanying drawings are the schematic representation of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
The dynamic making-up air device of a kind of turbo-charging diesel motor as shown in Figure 1 comprises the main turbosupercharger that is connected with the engine exhaust outlet pipe, and main turbosupercharger comprises main turbine 4 and main pressurized machine 5; Main turbine 4 connects gas exhaust manifold 3; Also be provided with the auxilliary turbosupercharger of connecting on the described engine exhaust outlet pipe with main turbosupercharger; Described auxilliary turbosupercharger comprises coaxial continuous auxiliary turbine 8 and auxilliary pressurized machine 9, and the steam outlet pipe of described auxilliary pressurized machine 9 is connected with engine intake manifold 15 by gas holder 13; Be installed in parallel electronic bypass valve 7 on the described auxiliary turbine 8; Be provided with electronic aeration valve 14 between described gas holder 13 and the engine intake manifold 15.
Shown in Figure 2 is structural principle frame of the present invention, wherein:
IN1: gas pedal acceleration/position signal, by regulating the signal that the engine fuel supply amount is controlled engine speed (power).Tentative 6 grades, acceleration: A0-A5, position: W0-W5; Digital quantity or analog amount are provided by sensor special.
IN2: engine rotational speed signal, engine speed are 0-3000r/min, and corresponding S0-S5 takes out from engine speed indicator, and analog amount needs HR high resistance to isolate.
IN3: Vehicle Speed signal; Vehicle Speed is pressed 0-60KM/h temporarily and is provided with, corresponding V0-V5; Take out from speedometer, analog amount needs HR high resistance to isolate.
IN4: gas holder pressure signal: switching value, two groups: 1, upper limit pressure P 1,2, threshold pression P2.
IN5: gearbox gear signal: switching value, B0-B5.
OUT1: the bypass valve control signal, switching value is controlled opening/closing of bypass valve.
OUT2: the aeration valve control signal, switching value is controlled opening/closing of aeration valve.
OUT3-5: spare control signal, switching value (not shown).
Working procedure of the present invention is:
Original state: gas holder air pressure is normal, aeration valve 14 is closed, bypass valve cuts out, accelerator pedal signal A=0, W=0 ....
Engine ignition: starting ignition switch, aeration valve 14 is opened, after aeration valve is opened, pressurized air in the gas holder (about 130 grams of quality, be roughly equal to following 100 liters of normal pressure), in engine intake manifold, replenish rapidly, guarantee the air inlet demand of motor first few work cycle, start the pressurized air of coming with auxilliary pressurized machine, replenish by gas holder endlessly.Engine start, the air displacement of engine start is enough to start auxiliary turbine work; Auxiliary turbine starts subsequently, auxiliary turbine links to each other with auxilliary pressurized machine is coaxial → → auxilliary pressurized machine proper functioning, the wheel of calming the anger of auxilliary pressurized machine, with air suction from auxilliary suction tude, be pressed into endlessly gas holder → → check valve opens, when the air pressure of auxilliary pressurized machine output during greater than the air pressure of gas holder, check valve is opened, to gas holder inflation → → the gas holder inflation, before aeration valve was closed, gas holder used as buffer.After aeration valve is closed, in the gas holder air pressure raise gradually → → engine idle, after the start up period of process, motor can be stable with minimum speed (idling) operation → → aeration valve 14 closes, during the engine idle operation, because the minimizing of fuel delivery and the rising of cylinder temperature, air fuel ratio and combustion case are all in the reasonable scope, but need not tonifying Qi also proper functioning → → gas holder 13 air pressure raise, after aeration valve 14 is closed, the air of auxilliary pressurized machine 9 compressions also is pressed into gas holder endlessly, the air pressure of gas holder is raise, at this moment should suitably open bypass valve, make the tail gas " bypass " that drives auxiliary turbine fall a part, can alleviate the working load of auxilliary turbosupercharger group, increase the service life → bypass valve 7 opens, after gas holder air pressure reaches certain value, tonifying Qi was required when gas-storing capacity can satisfy the motor acceleration, can be progressively until opening bypass valve fully, → → check valve 11 closes the unlatching of bypass valve, make auxilliary turbosupercharger break away from the high pressure ratio working area, auxilliary pressurized machine delivery pressure descends, and gas holder air pressure is higher than auxilliary pressurized machine delivery pressure, and check valve closes naturally → → gas holder 13 air pressure are normal → → motor continues idle.
Motor quickens: gas pedal is stepped on; the moment of gas pedal action; can send one group of electrical signal; be respectively applied for open aeration valve 14 carry out tonifying Qi and be used to close bypass valve 7 for auxiliary turbine raise speed → → aeration valve 14 opens → → motor quickens → → auxiliary turbine 8 quickens → → auxilliary pressurized machine 9 acceleration work → → check valve 11 opens → → gas holder 13 inflations → → the motor speed stabilizing → → aeration valve 14 closes; the moment that aeration valve is closed; the duration of Kai Qiing just; the accekeration A and the final position value W that depend on gas pedal; → → gas holder 13 air pressure raise → → bypass valve 7 opens; when bypass valve reaches appropriate value in engine speed; must progressively open; on the one hand the auxilliary pressure booster set of protection avoids the hypervelocity overload, avoid on the other hand influencing the motor proper functioning → → check valve (11) closes → → gas holder 13 air pressure are normal → → motor continues the stable speed operation.
Though it is obvious that supercharging technology of the prior art reduces the effect of discharging, power source is very big problem.Usually adopt two kinds of power source: A, electric boosters to utilize vehicle power, this is unconventional consumption on-vehicle battery.Public transit vehicle particularly, because the restriction of operating conditions, battery pack own is just than being easier to " power shortage ".So long-term the use can be shortened battery life even be influenced vehicle driving safety.Go back life period hysteresis problem simultaneously.B, to deposit the gas tank tonifying Qi be to utilize motor to drive compressor operating, and power that like this certainly will consumption of engine increases oil consumption.Because the rotation speed change scope of engine operation is very big, the coupling of compressor and motor is also difficult simultaneously.
And the present invention integrates the little and simple advantage of electric booster gas supplementary structure of gas holder tonifying Qi hysteresis, taked on former waste gas exhaust pipe, to increase changeable small-sized exhaust-gas turbocharger has been installed, this small-sized exhaust-gas turbocharger utilizes exhaust gas-driven turbine, pressurized machine can be the gas that motor provides capacity when engine low rotation speed, automatically break away from during high engine speeds, do not influence the motor proper functioning, do not need extra energy resource supply yet.
And the working state of tonifying Qi of the present invention also changes to some extent: tonifying Qi mode in the past is divided into lasting relatively tonifying Qi and moment tonifying Qi, and A, electric booster are to continue tonifying Qi, the hysteresis quality that it exists electric motor starting to bring relatively.Continuing the tonifying Qi time simultaneously must be very short, otherwise the battery pack burden is too heavy.B, gas holder tonifying Qi are the moment tonifying Qi, have hysteresis quality hardly, but it belongs to static tonifying Qi substantially, source of the gas are in time replenished very difficult, have the relatively poor problem of sustainability.The compressor coupling is difficult simultaneously.
The present invention gets the advantage of A and B scheme, can the moment tonifying Qi, can also continue tonifying Qi as required, and these 2 is indispensable key factor.More crucial is the deadly defect that has overcome A and B scheme, has solved " power source " problem.
According to laboratory data of the present invention, diesel engine moment acceleration mode reduces more than 50% oil consumption energy-conservation 8% after using the dynamic making-up air device of turbo-charging diesel motor than former engine emission.
Just the specific embodiment of the present invention of describing in the above specification, various not illustrating is construed as limiting flesh and blood of the present invention, the person of an ordinary skill in the technical field after having read specification can to before described embodiment make an amendment or be out of shape, and do not deviate from essence of an invention and scope.
Claims (7)
1. the dynamic making-up air device of turbo-charging diesel motor comprises the main turbosupercharger that is connected with the engine exhaust outlet pipe, it is characterized in that: also be provided with the auxilliary turbosupercharger of connecting with main turbosupercharger on the described engine exhaust outlet pipe; Described auxilliary turbosupercharger comprises coaxial continuous auxiliary turbine (8) and auxilliary pressurized machine (9), and the steam outlet pipe of described auxilliary pressurized machine (9) is connected with engine intake manifold (15) by gas holder (13); Be installed in parallel electronic bypass valve (7) on the described auxiliary turbine (8); Be provided with electronic aeration valve (14) between described gas holder (13) and the engine intake manifold (15).
2. the dynamic making-up air device of turbo-charging diesel motor as claimed in claim 1 is characterized in that: described auxilliary turbosupercharger is gas holder inflation by exhaust gas drive when engine idle.
3. the dynamic making-up air device of turbo-charging diesel motor as claimed in claim 1, it is characterized in that: also comprise central unit, described central unit is gathered gas pedal acceleration/position signal, Vehicle Speed signal, engine rotational speed signal, gas holder pressure signal, gearbox gear signal and engine ignition switch signal respectively by a plurality of sensors; And by to the unlatching of electronic bypass valve of the analysis and Control of above-mentioned signal (7) and electronic aeration valve (14) or close.
4. the dynamic making-up air device of turbo-charging diesel motor as claimed in claim 1 is characterized in that: on the steam outlet pipe of described auxilliary pressurized machine (9), the place, air outlet of closely auxilliary pressurized machine is provided with check valve.
5. the dynamic making-up air device of turbo-charging diesel motor as claimed in claim 1 is characterized in that: the gas holder pressure gauge (16) of measuring and showing gas holder pressure is installed on the described gas holder (13).
6. the dynamic making-up air device of turbo-charging diesel motor as claimed in claim 1 is characterized in that: the steam outlet pipe of described auxiliary turbine is provided with first order baffler (17) and second level baffler (18).
7. the dynamic making-up air device of turbo-charging diesel motor as claimed in claim 1 is characterized in that: when moment of engine start or acceleration, aeration valve is opened, and gas holder is proofreaied and correct the engine air-fuel ratio imbalance state to the engine intake manifold tonifying Qi; When engine speed reaches certain value, after the main turbosupercharger proper functioning, open bypass valve when closing aeration valve, motor enters normal working.
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| CN2011101658541A CN102242668A (en) | 2011-06-20 | 2011-06-20 | Dynamic air supplying device of turbocharged diesel engine |
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| CN2011101658541A CN102242668A (en) | 2011-06-20 | 2011-06-20 | Dynamic air supplying device of turbocharged diesel engine |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705071A (en) * | 2012-05-25 | 2012-10-03 | 浙江吉利汽车研究院有限公司杭州分公司 | Engine gas intake assisting device and automobile provided with same |
| CN103225552A (en) * | 2013-04-08 | 2013-07-31 | 天津大学 | Power turbine series-parallel combined device and control system |
| CN104018934A (en) * | 2013-02-28 | 2014-09-03 | 现代自动车株式会社 | Supercharging system for engine |
| CN104675512A (en) * | 2014-12-11 | 2015-06-03 | 哈尔滨工程大学 | Sequential supercharged diesel engine switching stabilizing device and control method |
| CN105840295A (en) * | 2016-05-26 | 2016-08-10 | 赵曰强 | Intelligent air storage type supercharging device and air storage type supercharging automobile |
| CN106812615A (en) * | 2015-11-30 | 2017-06-09 | 长城汽车股份有限公司 | The control method of engine, system and vehicle |
| CN107806364A (en) * | 2017-11-25 | 2018-03-16 | 芜湖钻石航空发动机有限公司 | A kind of pressurization gas control device, aviation engine with supercharger and control method |
| CN108730043A (en) * | 2015-07-24 | 2018-11-02 | 丁永新 | Power loosens the grass trimmer weakened immediately with accelerator control device |
| CN108798906A (en) * | 2015-07-24 | 2018-11-13 | 丁永新 | A kind of working method of grass trimmer |
| CN109944723A (en) * | 2019-04-15 | 2019-06-28 | 天津大学 | A kind of device and its control method recycling engine exhaust energy |
| CN114790936A (en) * | 2022-01-25 | 2022-07-26 | 丁祖龙 | Automobile turbocharger capable of shortening delay time |
| CN115163347A (en) * | 2022-05-30 | 2022-10-11 | 河南柴油机重工有限责任公司 | Diesel engine air supply control method and air supply system |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102705071A (en) * | 2012-05-25 | 2012-10-03 | 浙江吉利汽车研究院有限公司杭州分公司 | Engine gas intake assisting device and automobile provided with same |
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| CN104675512A (en) * | 2014-12-11 | 2015-06-03 | 哈尔滨工程大学 | Sequential supercharged diesel engine switching stabilizing device and control method |
| CN108798906A (en) * | 2015-07-24 | 2018-11-13 | 丁永新 | A kind of working method of grass trimmer |
| CN108730043A (en) * | 2015-07-24 | 2018-11-02 | 丁永新 | Power loosens the grass trimmer weakened immediately with accelerator control device |
| CN106812615A (en) * | 2015-11-30 | 2017-06-09 | 长城汽车股份有限公司 | The control method of engine, system and vehicle |
| CN105840295A (en) * | 2016-05-26 | 2016-08-10 | 赵曰强 | Intelligent air storage type supercharging device and air storage type supercharging automobile |
| CN107806364A (en) * | 2017-11-25 | 2018-03-16 | 芜湖钻石航空发动机有限公司 | A kind of pressurization gas control device, aviation engine with supercharger and control method |
| CN107806364B (en) * | 2017-11-25 | 2023-06-06 | 芜湖钻石航空发动机有限公司 | Supercharged gas control device, supercharged engine for aviation and control method |
| CN109944723A (en) * | 2019-04-15 | 2019-06-28 | 天津大学 | A kind of device and its control method recycling engine exhaust energy |
| CN114790936A (en) * | 2022-01-25 | 2022-07-26 | 丁祖龙 | Automobile turbocharger capable of shortening delay time |
| CN115163347A (en) * | 2022-05-30 | 2022-10-11 | 河南柴油机重工有限责任公司 | Diesel engine air supply control method and air supply system |
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Application publication date: 20111116 |