CN102128079A - Injection/drainage air-supply turbocharging system - Google Patents
Injection/drainage air-supply turbocharging system Download PDFInfo
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- CN102128079A CN102128079A CN2011100419134A CN201110041913A CN102128079A CN 102128079 A CN102128079 A CN 102128079A CN 2011100419134 A CN2011100419134 A CN 2011100419134A CN 201110041913 A CN201110041913 A CN 201110041913A CN 102128079 A CN102128079 A CN 102128079A
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Abstract
The invention discloses an injection/drainage air-supply turbocharging system which is applied to a turbocharged internal combustion engine of vehicles, ships and engineering machines to improve the low (rotating speed and load) working condition performance and the transient characteristics of the turbocharged internal combustion engine. Through two supplementary air supply structures, namely a high pressure air injection air supply pipeline and a turbocharged air drainage air supply pipeline of the system, charging air flowing into the internal combustion engine and combustion air flowing into a turbine are supplied, so that the power and the turbocharging pressure of the turbine are greatly increased, and the fuel consumption, the exhaust temperature and the harmful emission are obviously reduced. Compared with the prior art, the invention has the advantages of mature technology, simple structure, safe and reliable use, great conditioning degree and good effect.
Description
Technical field
The present invention relates to the turbo charge system in car, ship and the construction equipment engine supercharging technology field.
Background technique
Modern Internal-Combustion Engine improves constantly the present situation and the future development trend of power per liter density, makes the pressure ratio of the mean effective pressure of internal-combustion engine and turbosupercharger more and more higher.Because internal combustion engine turbocharging is the cooperation between the internal-combustion engine of the turbosupercharger of rotating type impeller machinery and reciprocating piston machinery, at this moment, these two kinds of machineries are also just outstanding more, serious because of the different unconformable contradictions of mutual coupling that produce of through-flow characteristic each other.Wherein, how to improve the problem of low (rotating speed, load) performance of operating condition of high pressure-charging internal-combustion engine and step response (acceleration) the most thorny with attract people's attention.In improving constantly mean effective pressure and the corresponding internal combustion engine turbocharging technical development historical progress of improving low-load performance and step response, the multiple turbosupercharger, turbo charge system that has produced prior art and corrective measure (see for details Lu Jiaxiang edit 1999137～200 pages of " diesel turbocharging technology " Beijing Machinery Industry publishing houses and Zhu Daxin write relevant introduction and narration in 1992411～420 pages of " turbosupercharging and turbosupercharger " Beijing Machinery Industry publishing houses).For example, turbosupercharger and turbo charge systems such as turbine, intake and exhaust bypass, (in proper order) supercharging in succession, switch type turbosupercharger, drainage type turbosupercharger, injection tonifying Qi supercharging are regulated in high rotating speed operating mode venting, change geometric cross section that prior art adopts, all be the effective ways that improve boosting internal combustion engine low-load performance and step response, they can both make the boost pressure of low operating mode obtain obviously to improve.These measures can effectively promote, mechanism and the essence of improving internal-combustion engine low-load performance and step response are: they have all implemented suitable variation adjusting control to the turbine actual internal area of turbosupercharger with the magnitude relationship that corresponding circulation flow disposes each other---and regulate control by the cross section and (such as become the geometric cross section turbine nozzle ring, the switch type turbosupercharger, sequential order supercharging etc.) and/or the unsteady flow amount regulate the control (vehicle turbocharger of band venting bypass valve for example, low operating mode intake and exhaust bypass turbo charge system, flow-guiding turbocharger, injection tonifying Qi turbo charge system etc.), reduce or cut down the influence degree that the tolerance that causes because of the low operating mode of internal-combustion engine reduces the boost pressure sharp fall that the total drops of turbine inlet air-flow of derivation produces, improve with having eliminated because of boost pressure and reduce the over-emitting black exhaust that needs caused that fuel in the formed cylinder of minimizing of the cylinder of internal-combustion engine inlet air charge quantity of causing can not fully burn and reduce heat load (delivery temperature), excessive discharge temperature, noxious emission transfinites, adverse consequencess such as the less and specific fuel consumption height of low speed torque make the low-load performance of internal-combustion engine and step response obtain obviously raising.
In view of the measure that improves low-load performance and step response all can be summed up in the point that on " raising boost pressure " this key problem in technology, therefore improve the amplitude size of boost pressure and the height of rate of rise and just become the judging standard that the good and bad degree of corrective measure validity is adopted in comparison.In above-mentioned every improved technological scheme, the degree of control maximum, the best results that surely belong to jet injection tonifying Qi turbo charge system, it is a kind of technological scheme of improving the most with practical value and development prospect of high pressure-charging internal-combustion engine low-load performance and step response.
The direct crux why boosting internal combustion engine low-load performance and step response degenerate is because the quantity sharp fall of the interior charge air of cylinder, jet injection tonifying Qi turbo charge system is according to this key factor, adopt " powerful tonifying Qi " measure to hang down operating mode tolerance deficiency to the negative effect that performance was caused pointedly, thereby significantly improved low-load performance and step response with direct weakening and counteracting.Prior art jet injection tonifying Qi turbo charge system employing high-pressure air injection making-up air device in air-intake of combustion engine house steward, exhaust manifold, turbine rotor or supercharger impeller, directly improves low-load performance and step response with blast injection.The typical scenario of prior art injection tonifying Qi can be referring to Huang Yousheng, Chen Yi " utilize the air ejection scheme to improve the research of turbo-charged diesel acceleration) " 1984 the 4th phases of internal-combustion engine journal, the 293rd～307 page and yellow crane, Chen Tianping, Li Jing " application of automatically controlled supercharging technology on diesel engine " 2009 the 6th phases of diesel engine, the narration and the introduction of related content in 1999160～161 pages of the 42nd, 43,49 page and Lu Jiaxiang chief editor " diesel turbocharging technology " Beijing Machinery Industry publishing houses.Outstanding feature of prior art high-pressure air injection tonifying Qi turbo charge system and advantage are: this system comes down to one and has the device that can apply the makeup energy function to turbine rotor, thereby can be when the low operating mode operation of internal-combustion engine under the situation of exhaust energy (gaseous-pressure, temperature and flow comprehensive) wretched insufficiency, still can adopt " tonifying Qi " to provide gas compressor generation high pressure-charging pressure desired power to the turbine of pressurized machine.This advantage be other any do not possess turbine rotor is applied the turbosupercharger of makeup energy device or turbo charge system all is difficult to reach and (regulate even adopt the turbine of adjustable nozzle ring to become the geometric cross section, it is also very limited to the amplitude of the low operating mode boost pressure of lift-rising) that surmount.But prior art high-pressure air injection tonifying Qi turbo charge system also exists following shortcoming with not enough:
1) provides the high-pressure air source (as the braking system of truck and the air starting system of boats and ships and tank) of high-pressure air injection tonifying Qi in load-carrying vehicle and the marine internal combustion engine device, because the restriction of gas cylinder tank volume footprint size, generally can only intermittently use (continuous use is no more than one minute usually and just must stops using, and needs then to prepare against to the inflation of gas cylinder jar to use again again) in short-term.After stopping the high-pressure air tonifying Qi, as not taking corresponding complementary energy measure, formerly just can not continue to keep and can fall after rise near the state before the tonifying Qi through the improved performance parameter of tonifying Qi (boost pressure, row's temperature, moment of torsion, power etc.).Therefore, though the prior art scheme can rely on the injection tonifying Qi (the jet tonifying Qi high-pressure air quantity that is consumed is little) of short time just can effectively improve the step response (acceleration) of internal-combustion engine, yet it is remained unchanged for a long period of time if will keep the high pressure-charging pressure of tonifying Qi gained, just must carry out the tonifying Qi of long high-pressure air injection continuously could realize, thereby just must consume a large amount of high-pressure airs, this shortcoming significant limitation the prior art scheme in the promotion and application that improve aspect the low-load performance.
2) adopt prior art high-pressure air injection tonifying Qi scheme, because the boost pressure that the gas compressor of turbosupercharger produces can significantly increase severely when tonifying Qi suddenly, therefore often cause the surge of gas compressor, thereby make gas compressor produce judder and airflow fluctuation can not stable operation.
In order to improve the shortcoming and defect that prior art exists, the invention discloses a kind of new improvement internal-combustion engine low-load performance and the jet injection tonifying Qi turbo charge system scheme of step response.
Summary of the invention
The objective of the invention is to provides a kind of jet injection gas compensation function better for low-load performance and the step response of improving internal-combustion engine, degree of control maximum, technology maturation, safe and reliable, practicability is the strongest (changes minimum just can the integration of workload and incorporates car, ship is now used combustion engine powered system) and can save novel jet flow injection tonifying Qi turbo charge system---the injection/drainage tonifying Qi turbo charge system of high-pressure air consumption realization internal-combustion engine by long term maintenance high pressure-charging pressure in low operating mode steady running.Core of the present invention is: this system removes equally with prior art jet injection tonifying Qi turbo charge system to be had outside the high-pressure air injection tonifying Qi pipeline, also has concurrently simultaneously to have another pressurized air drainage tonifying Qi pipeline convection current and go into the tonifying Qi that auxiliary additional replenishing (or displacement substitutes jet injection high-pressure air) implemented in the combustion gas of booster turbine.This unique texture of technical solution of the present invention, can guarantee that injection/drainage tonifying Qi turbo charge system only need consume a spot of high-pressure air and just can make internal-combustion engine stablize long-time running at the high performance index that low operating mode keeps reaching after the tonifying Qi, and can avoid gas compressor surge when tonifying Qi, to occur.The basic technology scheme that the present invention adopts for achieving the above object (accompanying drawing 1) is as follows:
The core structure of this scheme mainly comprises three parts---a high-pressure air injection making-up air device, a flow-guiding turbocharger and an intercooler.Wherein, high-pressure air injection making-up air device is a critical component of implementing main tonifying Qi air feed function for the charge air air inlet of internal-combustion engine and the turbine combustion gas air inlet in the turbosupercharger.It is made up of high-pressure air gas compressor (1), high-pressure air basin (2), solenoid valve (3), pressure regulator valve (4), single-stage gas ejector (5) and a high-pressure air injection tonifying Qi pipeline (A) that utilizes power of internal-combustion engine own or exogenous power to drive.Flow-guiding turbocharger then is made up of the turbosupercharger and a pressurized air drainage tonifying Qi pipeline (B) of a normal conventional typical structure.The function of pressurized air drainage tonifying Qi pipeline (B) is to be that the auxiliary air compensating air feed is implemented in turbine combustion gas air inlet in the turbosupercharger when the low operating mode of internal-combustion engine, and the tonifying Qi of alternative displacement high-pressure air to be saving the high-pressure air consumption, and avoids boosting because of tonifying Qi and cause compressor surge.
In this scheme, High-Pressure Compressor (1) is stored in the high-pressure air of its generation in the gas tank (2), when internal-combustion engine is in low operating mode running and needs the tonifying Qi of high-pressure air injection, opens solenoid valve (3) and pressure regulator valve (4), with the jet pipe in the high pressure air introducing single-stage gas ejector (5) of gas tank (2) outflow, the pressurized air injection that after nozzle exit forms high-velocity jets intercooler is flowed out flows in the gas ejector and with it and mixes, mixed gas boosts through diffuser pipe then, flow into intake lines of combustion engines through high-pressure air injection tonifying Qi pipeline (A), finish the overall process that tonifying Qi is carried out in air inlet to the internal-combustion engine charge air.Tonifying Qi is together with the mixed gas of the pressurized air of intercooler outflow, in cylinder of internal-combustion engine, burn together with fuel mix, exhaust fuel gas working medium quantity, pressure and temperature have been improved, the combustion gas working medium flow, the combustion gas stagnation pressure (expansion ratio of turbine) that flow into the turbine air inlet volute are all significantly increased, thereby cause turbine merit corresponding significantly increase, blower outlet boost pressure to obtain remarkable lift-rising.On the other hand, the raising of boost pressure makes the air-mass flow that enters cylinder of internal-combustion engine because of the density of air inlet increases, and the amount of charge air that flows into ejector by the intercooler outlet is increased to some extent because of the increase of differential static pressure.The interaction of these two kinds " chain effects ", with the raising boost pressure benefiting of " benign cycle being amplified " arranged to increasing turbine flow, can strengthen differential static pressure---" the drainage tonifying Qi pressure reduction " of the gaseous-pressure of the boost pressure of turbocharger air compressor outlet and turbine air inlet volute inlet, auxiliary/the displacement that increases pressurized air drainage tonifying Qi pipeline (B) substitutes air compensation, reduce operating mode transient time, accelerating mode parameter stable.
According to the needs of the low operating mode of internal-combustion engine, the physical dimension of appropriate design gas ejector and adjusting high-pressure spray air enter the gas pressure of ejector jet pipe, and required boost pressure value just can be provided.
After utilizing high-pressure spray pressurized air to reach the required boost pressure of the low operating mode of internal-combustion engine, then can close the valve of giving vent to anger of high pressure air jar gradually, reduce and, save the high-pressure air consumption until the air feed that stops the gas ejector jet pipe.Simultaneously, should be when reducing the high-pressure air air feed, corresponding increase fuel injection quantity also increases the aperture of pressure regulation (electromagnetism) valve in the pressurized air drainage tonifying Qi pipeline (B), lean against " the drainage tonifying Qi pressure reduction " that this operating mode set up and strengthen tolerance and the energy of mending the turbine combustion gas, promote boost pressure, compensation stops the boost pressure reduction that high-pressure air causes because of subtracting, thereby the duty parameter (comprising static pressure pressure) of internal-combustion engine can be maintained the close state of high performance index before the high-pressure spray pressurized air of stopping using.Like this, base case of the present invention is after setting up the required boost pressure of low operating mode with high pressure air stream in the short time, the high pressure air of can stopping using also utilizes the aperture of pressure regulator valve (or solenoid valve) in the pressurized air drainage tonifying Qi pipeline (B) to regulate control, increase the blower outlet bypass and drain into the pressurized air flow of air supply at turbine air inlet volute place and this boost pressure value of long term maintenance, to realize that internal-combustion engine can turn round steadily in the long term in required operating mode.
In sum, to be different from the characteristics and the advantage of prior art high pressure air stream injection tonifying Qi turbo charge system and flow-guiding turbocharger as follows for injection disclosed by the invention/drainage tonifying Qi turbo charge system:
1. injection/drainage tonifying Qi turbo charge system has increased pressurized air drainage tonifying Qi pipeline (B) than prior art high pressure air stream injection tonifying Qi turbo charge system, and its advantage is can keep internal-combustion engine to turn round so that high performance index is steady in a long-term in required operating mode when saving the high-pressure air use amount.These characteristics have broken through prior art high-pressure air injection tonifying Qi turbo charge system then can't taboos of limiting that improve steady in a long-term to low-load performance because of being subjected to the restriction of high-pressure air consumption can only carry out that the short time tonifying Qi can make moderate progress to step response, can be under the condition that consumes a small amount of high-pressure air the pressurized air drainage tonifying Qi of dependence system self continue to remain on and hang down operating mode and move with high-performance steadily in the long term.
2. the high-pressure air tonifying Qi pipeline (A) in injection/drainage tonifying Qi turbo charge system is in the tonifying Qi process of the low operating mode operation of internal-combustion engine, not only realized major function that internal-combustion engine cylinder charge air is carried out tonifying Qi, also significantly increased " drainage tonifying Qi differential static pressure " in the pressurized air drainage tonifying Qi pipeline (B) in addition, cause the drainage air compensation to heighten, improved " auxiliary air compensating " function of pressurized air drainage tonifying Qi.In the prior art flow-guiding turbocharger, because passage component design configurations unreasonable, the value of drainage tonifying Qi differential static pressure is often very little in low operating mode in many flow-guiding turbochargers, even for bearing, and the tonifying Qi effect is very little or be negative effect.But in injection/drainage tonifying Qi turbo charge system,, can guarantee to remain on the occasion of High Pressure Difference at low operating mode drainage tonifying Qi differential static pressure because the boost pressure of high-pressure air injection tonifying Qi derivation benign cycle lift-rising is benefited.
3. because the improvement of low-load performance could realize that and the boost pressure of tonifying Qi initiation rises sharply and often is accompanied by gas compressor generation surge in the pressurized machine, makes pressurized machine can not stablize proper functioning when only reaching the boost pressure of high value after tonifying Qi.The pressure regulator valve of moderately opening in the pressurized air drainage tonifying Qi pipeline (B) (or solenoid valve) makes it form the generation that " bleed line " can avoid surge.
According to as can be known last, the technology of the present invention injection/drainage tonifying Qi turbo charge system has comprised prior art high pressure air stream injection tonifying Qi turbo charge system and prior art flow-guiding turbocharger, but be not to be the simple superposition of these two prior art functions, but complement each other, interact, on theoretical basis and effect, essential raising has been arranged than prior art.Far be superior new effect in function with using to have produced through well-designed injection/drainage tonifying Qi turbo charge system than simple combination prior art.
The structure and the working principle of the gas ejector in the high pressure air stream injection making-up air device are as follows: the gas ejector assembly by cylinder body 1, jet pipe 2, converging portion 3, mixing section 4 and Diffuser 5 totally five parts form (accompanying drawing 2).The wall molded lines of jet pipe 2 can be contraction or contraction---and the expanding structure, its outlet generally is positioned at the inlet of converging portion 3.When the high-pressure air that flows out from gas tank after pressure regulator valve enters jet pipe 2, air expansion also quickens.Air can varying in size and be subsonic velocity, the velocity of sound, ultrasound velocity and flow with the structure of jet pipe 2 wall molded lines and jet pipe 2 outlets and inlet air pressure ratio.Generally, because the gas tank air pressure is higher, cause the ratio p of jet pipe 2 outlet air pressure and inlet air pressure
1/ p
2Generally speaking all less than critical pressure ratio p
Cr/ p
1=0.52828, the air-flow that causes jet pipe 2 to export is ultrasound velocity and flows, and its jet pipe wall molded lines also should shrink in corresponding employing---expanding structure (being the Laval nozzle structure).The flow-disturbing shear action of the high-velocity jets that is flowed out by jet pipe 2 outlet is being flowed on the low speed low-pressure charging pressure air of ejector cylinder body 1 through bypass valve by blower outlet, and drives it and mix (presenting the injection effect) with it.The result of two bursts of air-flow momentum transfers makes the flow velocity of jet air-flow reduce to subsonic velocity (through the shock wave effect), and after shock wave, mixed gas quickens in converging portion 3 once more, enters mixing section 4 and continues to mix, and reaches the almost velocity flow profile of uniformity.At last, mixed airflow converts part kinetic energy (velocity head) to pressure by Diffuser 5, flows into the suction tude of internal-combustion engine through high-pressure air injection tonifying Qi pipeline (A).
High-Pressure Compressor in the high pressure air stream injection making-up air device is generally the single-stage or the multi-level piston formula air compressor that are driven by I. C. engine crankshaft, and the pressure of its output air can be up to (1～30) MPa.In the braking or start-up system for existing load-carrying vehicle and marine internal combustion engine device, air compressor and basin thereof almost are indispensable equipment, but needn't be ad hoc and dual-purpose.Especially in the equipment of boats and ships and fixed internal combustion engine power plant, all have Large Storage Tanks gas holder jar or a large amount of gas cylinder, more no problem usually.Because equipment is installed or the restriction of spatial arrangement, particularly the 30MPa ultrahigh pressure gas holder that twines of aluminum alloy inner bag carbon fiber (now on the tank commonly used be air compressor and the storage bottle of 15MPa) actual successfully used (seeing the introduction in the 95th～97 page of Liu Hao, Zhang Hao, Luo Xinfa, Chen Ying " compressed-air power automobile integrated technology " electromechanical engineering 2003 the 5th phase for details), make the more simple technique scheme of saving air compressor and directly adopt in good time replacing gas tank to be used as tonifying Qi equipment in vehicle become possibility, this is particularly suitable to dilly.Also can be released bright in the doubt of application implementation on the dilly thus to the present invention program: in fact as far back as last century the seventies the successful examples (see Jiang Houmei, Pan Qinghu, Cai Wenxing for details and write commentary introduction in the 45th～48 page of " motor car engine supercharging technology " Beijing people's traffic publishing house 1984) that " the punching type pressurization system " of pressurized air directly is provided at minibus applying high voltage air ejector is just arranged.
In order to keep the ability of high performance index long-term operation after stopping using high-pressure spray gas in further lift-rising boost pressure, saving high pressure gas consumption, enhancing on the base case of the present invention, increase again and proposed two new technological schemes (accompanying drawing 3 and accompanying drawing 4), formed technological scheme of the present invention jointly, their characteristics are as follows:
The difference part that new solution shown in the accompanying drawing 3 obviously is different from base case (accompanying drawing 1) is:
1) the tonifying Qi air that flows out of high-pressure air injection tonifying Qi pipeline (A) suction tude that no longer enters internal-combustion engine, but flow to air pipe in the tonifying Qi chamber (9) that links together with internal-combustion engine vent-pipe outlet, the tonifying Qi air flows into the air inlet volute of the turbine (7) of pressurized machine more together with after the exhaust of internal-combustion engine mixes in tonifying Qi chamber (9).Like this, the object of high-pressure air injection tonifying Qi no longer is the air inlet of internal-combustion engine charge air, but flows into the air inlet combustion gas of the air inlet volute of turbocharger turbine (7).
2) the low-pressure injection air that flows into the ejector cylinder body because of the high-pressure spray air ejection in gas ejector (5) is not the pressurized air that is flowed out by intercooler (8) outlet but enters intercooler (8) preceding pressurized air or ambient air.Tonifying Qi chamber (9) in the new solution is one to be installed in the box-shaped breather line between turbine (7) the air inlet volute suction flange of internal-combustion engine vent-pipe outlet(discharge) flange and turbosupercharger, be furnished with the tonifying Qi air that air pipe ventilation body ejector (5) flows out in it, the then logical I. C. engine exhaust combustion gas of its complementary space in the case, two kinds of gas outlets in tonifying Qi chamber (9) mix the combustion gas that forms inflow turbine air inlet volute.The same with base case (accompanying drawing 1), new departure (accompanying drawing 3) is same because the participation of tonifying Qi air, increased the mass flow rate of turbine combustion gas working medium, cause the capacity for work of turbine significantly to increase, thereby the also corresponding boost pressure that improves the supercharger air compressor outlet makes the low-load performance of internal-combustion engine and step response obtain significantly to improve.Compare with the base case shown in the accompanying drawing 1, the advantage of new departure of accompanying drawing 3 expression by: because the displacement volume of cylinder of internal-combustion engine is limit, thereby the high pressure injection air compensation of base case (accompanying drawing 1) also is restricted, if will further improve boost pressure, just must increase the initial injection pressure of high-pressure spray air again, this is unfavorable to saving high-pressure air.On the contrary,, then do not have this restriction,, help energy-conservation so can under the state of low pressure values jet air, replace the high-pressure air energy to come the boosting turbine rotor to improve boost pressure with increasing flow of air supply because the tonifying Qi that new departure of accompanying drawing 3 produces is to mend turbine.In addition, can regulate the tonifying Qi quantity of high-pressure air injection tonifying Qi pipeline (A) and pressurized air drainage tonifying Qi pipeline (B), so that control the tonifying Qi dynamics and avoid surge by solenoid valve.But accompanying drawing 3 schemes also have shortcoming: high pressure injection tonifying Qi air does not participate in the burning of internal-combustion engine, thereby has caused energy loss.As for the new departure shown in the accompanying drawing 4, owing to the tonifying Qi of (of the same name) another parallel pipeline (A) in the air pipe that has increased by one tunnel tonifying Qi chamber (9), so can improve the function of lift-rising boost pressure by a larger margin with high pressure injection tonifying Qi pipeline (A).In addition, turbine in this scheme in the pressurized machine (7) has adopted the variable cross section more complicated than the normal conventional typical structure, that function is more complete, unsteady flow amount to regulate turbine (seeing the related content among Chinese invention patent application publication number CN101943052A " turbosupercharger that a kind of turbine variable cross section and unsteady flow amount are regulated " and the Chinese invention patent Shen Qing Publication publication number CN101560909A " a kind of flow-guiding turbocharger " for details), with adapt to raising day by day to improving the active demand of low-load performance and step response.
Rationally selecting with scope of the present invention program's gas ejector device high-pressure spray air is generally (0.25～0.7) MPa, and injection is no more than 3 than rationally selecting with the upper limit of (promptly by the ratio of the quality of the air quality of pressurized air in the injection inflow gas ejector cylinder body or ambient air and high-pressure spray air).
Description of drawings
Shown in Fig. 1 is the layout schematic representation of injection of the present invention/drainage tonifying Qi turbo charge system basic technology scheme.
Shown in Fig. 2 is the structural representation of SINGLE STAGE SUPERSONIC GAS EJECTOR.
Shown in Fig. 3 and Fig. 4 is the layout schematic representation of injection of the present invention/other two kinds of technological schemes of drainage tonifying Qi turbo charge system.
Fig. 5 shows a kind of SINGLE STAGE SUPERSONIC GAS EJECTOR practical structures example, and (Fig. 5 a) and the tonifying Qi chamber practical structures example (Fig. 5 b) of the double flow channel import turbine vaneless scroll that connects with it.
Embodiment
Below, by embodiment with in conjunction with the accompanying drawings technology contents of the present invention is further described.
As mentioned above, the present invention program's technological core is to utilize the high pressure air that flows out in the gas tank of high pressure air air feeder, high-speed jet air by its expansion acceleration formation in the gas ejector jet pipe, injection is exported or is flowed into by the blower outlet bypass of ambient air or turbosupercharger the low-pressure charging air of gas ejector cylinder body by intercooler, the two mixing section at ejector mixes and formation " tonifying Qi air " after diffuser pipe boosts, import the suction tude of internal-combustion engine and/or be installed in honeycomb duct in the box-shaped tonifying Qi chamber between the turbine volute suction flange of internal-combustion engine vent-pipe outlet(discharge) flange and turbosupercharger, near tonifying Qi chamber outlet (turbine volute import), the tonifying Qi air mixes the back and flows into turbine wheel with I. C. engine exhaust combustion gas injection at last.Because the participation of " tonifying Qi air ", the mass flow rate and the enthalpy drop of turbine combustion gas working medium have been increased, the capacity for work of turbine is significantly increased, thereby the also corresponding boost pressure that improves the supercharger air compressor outlet cause the low-load performance of internal-combustion engine and step response to obtain significantly to improve.
The present invention program's injection/drainage tonifying Qi turbo charge system system is made up of with a tonifying Qi chamber and corresponding connecting pipeline a high-pressure air injection making-up air device, a flow-guiding turbocharger, an intercooler.Shown in the accompanying drawing 5 is two annexes in injection/drainage tonifying Qi turbo charge system of using of a truck---the example of Design of SINGLE STAGE SUPERSONIC GAS EJECTOR and the tonifying Qi chamber that connects with this ejector.Wherein, the structure accompanying drawing 5a of SINGLE STAGE SUPERSONIC GAS EJECTOR assembly is a typical coaxial SINGLE STAGE SUPERSONIC GAS EJECTOR structure (accompanying drawing 2).Its core component jet pipe is the Laval jet pipe, and is all very high to the requirement of the required precision of the geometrical shape of its flow passage component and size (the especially size at smallest cross-sectional place) and machining degree of finish grade, must meticulous design and processing.Because the pressurized air flow of the turbosupercharger of Vehicular internal combustion engine is generally all very little, the corresponding high-pressure spray tonifying Qi air quantity that consumes when low operating mode and load variations is also less, therefore the air feed capacity of the size of gas ejector assembly and the air compressor of supplying its high-pressure spray air and gas tank and relevant equipment investment and occupy-place volume are also all very little, and this is the present invention program also applicable reason place on dilly.Gas ejector shown in Fig. 5 a adopts the transformation injection, and the injection pressure range of its high-pressure spray air is (0.3～0.6) MPa, and the injection ratio is about 3.Shown in Fig. 5 b is the tonifying Qi chamber structure that docks with the gas ejector assembly.The tonifying Qi chamber is actual to be a box-shaped breather line.Its inlet end flange 1 is connected with the outlet(discharge) flange of internal-combustion engine vent-pipe, and outlet side flange 2 then joins with the inlet end flange of the turbine air inlet volute of turbosupercharger.Because the internal-combustion engine vent-pipe outlet is the double flow channel structure with the turbine air inlet volute of turbosupercharger, connects so the tonifying Qi chamber also must correspondingly be arranged to two parallel air chamber structures abreast.Tonifying Qi air by gas ejector flows out is divided into two-way by a tee union, flows into the tonifying Qi chamber through tonifying Qi conduit (3), mixes the back with I. C. engine exhaust (combustion gas) injection and flow into turbine near the outlet of tonifying Qi chamber.The tonifying Qi cell structure is simple, and is all not high to the requirement of morpheme, size and degree of finish grade aspect, so can weld synthetic after simple and mechanical processing.
Claims (4)
1. injection/drainage tonifying Qi turbo charge system, it comprises that high-pressure air injection making-up air device is (by air compressor (1), gas holder (2), solenoid valve (3), pressure regulator valve (4), gas ejector (5), high-pressure air injection tonifying Qi pipeline (A) is formed), intercooler (8), tonifying Qi chamber (9) and corresponding connecting pipeline, it is characterized in that: this system has concurrently simultaneously and has high-pressure air injection tonifying Qi pipeline (A) and two kinds of tonifying Qi pipelines of pressurized air drainage tonifying Qi pipeline (B) coexist.
2. by the described injection of claim 1/drainage tonifying Qi turbo charge system, it is characterized in that: the high-pressure spray air intlet of jet pipe links to each other with the high-pressure air supply air line of high-pressure air injection making-up air device in the gas ejector (5), and the inflow entrance of the low-pressure injection air in the gas ejector (5) must be communicated with the pressurized air bypass line that the gas compressor (6) of ambient air or turbosupercharger exports, so, the inlet of high-pressure air injection tonifying Qi pipeline (A) (also being the outflow opening of jet and injection mixing air in the gas ejector (5)) then connects (the entrance point flange of this tonifying Qi chamber (9) and outlet end flange dock with the suction flange of air inlet volute of turbine (7) in the outlet(discharge) flange of internal-combustion engine vent-pipe and the turbosupercharger respectively), formation high-pressure air injection tonifying Qi pipeline (A) with the suction tude and/or the air pipe in tonifying Qi chamber (9) of internal-combustion engine.
3. by the described injection of claim 1/drainage tonifying Qi turbo charge system, it is characterized in that: the inlet end mouth of pipe of pressurized air drainage tonifying Qi pipeline (B) is communicated with a pressurized air bypass arm of gas compressor (6) outlet in the turbosupercharger, the outlet side mouth of pipe then both can with the exhaust fuel gas pipeline connection that flows into turbine (7) air inlet volute by internal-combustion engine vent-pipe, also can be connected with the private passage of logical drainage pressurized air tonifying Qi in the inlet tube that leads to turbine (7) air inlet volute that in tonifying Qi chamber (9), flows out or with the shared passage of drainage pressurized air and bypass combustion gas.
4. by the described injection of claim 1/drainage tonifying Qi turbo charge system, it is characterized in that: the structural form of the turbine in the turbosupercharger (7) both can be the typical structure of normal conventional, also can be the labyrinth structure with variable cross section and unsteady flow amount can regulate function.
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| CN201110041913.4A CN102128079B (en) | 2011-02-22 | 2011-02-22 | Injection/drainage air-supply turbocharging system |
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| CN102128079B CN102128079B (en) | 2017-01-25 |
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| CN102359413A (en) * | 2011-09-28 | 2012-02-22 | 奇瑞汽车股份有限公司 | Turbocharging system |
| CN103133125A (en) * | 2013-03-14 | 2013-06-05 | 吉林大学 | Decompression-air injection system of two-stage supercharging internal combustion engine |
| CN103423000A (en) * | 2012-05-17 | 2013-12-04 | 福特环球技术公司 | Boost reservoir control |
| CN105067268A (en) * | 2015-08-06 | 2015-11-18 | 中国北方发动机研究所(天津) | Turbine-piston combined cycle engine ejection system |
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| CN106555709A (en) * | 2015-09-29 | 2017-04-05 | 长城汽车股份有限公司 | The QI invigorating jet pipe of electromotor, making-up air device and electromotor |
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| CN109798179A (en) * | 2019-01-19 | 2019-05-24 | 潍柴重机股份有限公司 | A kind of pressurized air means of deflation and bleed method |
| CN109798179B (en) * | 2019-01-19 | 2020-11-20 | 潍柴重机股份有限公司 | Supercharged air deflation device and method |
| CN113091857A (en) * | 2021-04-30 | 2021-07-09 | 中水东北勘测设计研究有限责任公司 | Emergency response equipment for dealing with flood burst |
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