CN104500213A - Compressed air recycling and supplying system and method of turbo supercharged engine - Google Patents
Compressed air recycling and supplying system and method of turbo supercharged engine Download PDFInfo
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- CN104500213A CN104500213A CN201410576934.XA CN201410576934A CN104500213A CN 104500213 A CN104500213 A CN 104500213A CN 201410576934 A CN201410576934 A CN 201410576934A CN 104500213 A CN104500213 A CN 104500213A
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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
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Abstract
The invention discloses a compressed air recycling and supplying system and method of a turbo supercharged engine. Except for a structure of a common turbo supercharged engine, the system is further provided with a low-pressure air storage tank, a high-pressure air storage tank, an adjustable opening electromagnetic valve, a butterfly valve, a one-way valve, a pressure reduction valve, an air supplying valve and a variable phase exhaust valve. Under the high-speed large load condition of the turbo supercharged engine, waste which should pass through a turbine is used by the system for making compressed air, and the compressed air is stored. When an automobile is braked, the compressed air auxiliary brake manner is used for carrying out further compressing supercharging on the gas recycled in the previous step and storing the gas. When the automobile is started at the low speed, the compressed air stored in the previous step is utilized for carrying out supplying. The system can recycle more complementary energy for the traditional turbo supercharged engine, and the low speed and acceleration performance is improved, and the low speed and acceleration emissions are reduced.
Description
Technical field
The present invention relates to a kind of turbosupercharged engine pressurized air to reclaim and air compensating system and method thereof, belong to field of power machinery.
Technical background
In modern automobile industry, most of diesel engine and part of gasoline machine use turbocharging technology all.But, but improving constantly along with HP, hp/litre index, for single-stage turbocharger, require that it has the adaptability of higher supercharging pressure ratio and wider combustion motor operating range, under this requirement, conventional turbocharger has been difficult to meet the demands, all cannot Effec-tive Function under the operating modes such as low speed anxious acceleration, the large load of low speed, causes the problems such as accelerated reaction sluggishness, mixed gas quality decline, smoke emission increase.For these problem, both at home and abroad to utilizing high pressure tonifying Qi to do extensive research to the response and efficiency that promote pressurized machine, research shows that in the anxious acceleration of low engine speed and low speed high load working condition be that motor carries out tonifying Qi, discharge when effectively can promote the speed of response of pressurized machine and reduce low engine speed, but the gas source of traditional air compensating system is the high-pressure air be stored in gas tank, use amount is limited, be difficult to be applied in actual vehicle, therefore invent a kind of motor complementary energy that can utilize and be extremely necessary to the device preparing pressurized gas.
Summary of the invention
Accelerating and power character and emission problem under low speed high load working condition to improve turbosupercharged engine low speed is anxious, fully recycling motor complementary energy simultaneously, the invention provides the recovery of a kind of turbosupercharged engine pressurized air and air compensating system and method thereof.
The technological scheme that the present invention deals with problems is as follows:
A kind of turbosupercharged engine pressurized air reclaims and air compensating system comprises turbosupercharging pressurized air reclaiming system, engine compressed air auxiliary braking system, motor air compensating system, wherein turbosupercharging pressurized air reclaiming system is connected with engine compressed air auxiliary braking system by snifting valve, and engine compressed air auxiliary braking system is connected with air compensating system by reduction valve.
Described turbosupercharging pressurized air reclaiming system comprises turbosupercharger, adjustable opening solenoid valve, the first low pressure gasholder, snifting valve; Adjustable opening solenoid valve one end is connected with the engine intake manifold after turbosupercharger, and the other end is connected with the first low pressure gasholder, and the snifting valve that the first low pressure gasholder is covered by pipeline and engine cylinder is connected.Described turbosupercharger is formed by connecting by coupling shaft by turbocharger air compressor end and turbocharger turbine end, and supercharger air compressor end is connected with intake manifold, and turbocharger turbine end is connected with outlet pipe.
Described engine compressed air auxiliary braking system comprises cylinder, piston, variable phase exhaust valve, butterfly valve, one-way valve, high pressure tank; Piston is positioned at cylinder, and variable phase exhaust valve is positioned at cylinder upper wall, and butterfly valve is positioned on outlet pipe, and one-way valve one end is connected with the outlet pipe between variable phase exhaust valve and butterfly valve, and the other end is connected with high pressure tank.
Described variable phase exhaust valve comprises cam, rocking arm, push rod upper half part, spring, push rod head, exhaust valve, hydraulically-controlled one-way valve and hydraulic circuit control valve; Cam contacts with one end, and the rocking arm the other end contacts with push rod upper half part, and push rod upper half part is connected with push rod head by spring, and push rod head directly contacts with exhaust valve, is filled between hydraulically-controlled one-way valve and hydraulic circuit control valve by hydraulic oil.
Described motor air compensating system comprises reduction valve, the second low pressure gasholder and aeration valve; Second low pressure gasholder one end is connected with high pressure tank by reduction valve, and one end is by aeration valve and cylinders.
The turbosupercharged engine pressurized air of described system reclaims and supplementing method for air comprises turbosupercharging pressurized air recovery method, engine braking pressurized air recovery method and motor supplementing method for air, described turbosupercharging pressurized air recovery method is a kind of recovery by low-pressure gas and the method stored, engine braking pressurized air recovery method is a kind of mixing with additional air by aforementioned low-pressure gas and the method for further pressurized storage, and motor supplementing method for air a kind ofly pressurized air is supplemented inlet casing for motor and provide the method for extra fresh air.
Described turbosupercharging pressurized air recovery method is: when the exhaust gas valve of turbocharger turbine end is about to open because of engine back pressure is excessive but opens not yet, adjustable opening solenoid valve is opened in advance and is made Partial shrinkage air be filled with the first low pressure gasholder, when gas pressure in low pressure gasholder rises and moves closer to gas pressure in intake manifold, regulate aperture solenoid valve to close gradually, the pressure stability that maintains in intake manifold opened by the exhaust gas valve of turbocharger turbine end simultaneously.
Described turbosupercharging pressurized air reclaiming system utilizes adjustable opening electromagnetic valve to be filled with the gas mass flow of the first low pressure gasholder, thus make the pressurized air being filled with the first low pressure gasholder only account for a part for gas gross in intake manifold, decrease the impact on engine work as far as possible.
The method that described engine braking pressurized air reclaims is: when vehicle is in damped condition, piston moves to aspirating stroke lower, when intake valve is closed, by snifting valve, the pressurized air in the first low pressure gasholder is sprayed into cylinder, pressurized air and original air inlet in the cylinder mixed being incorporated in compression stroke are collapsed into more pressurized gas further by piston, open at compression stroke variable phase in latter stage exhaust valve, butterfly valve cuts out, pressurized gas discharge cylinder, and enter high pressure tank by one-way valve.
The method of described motor tonifying Qi is: pressurized gas enter the second low pressure gasholder by reduction valve, maintain the second low pressure gasholder tank internal pressure, second low pressure gasholder sprays pressurized air when motor is in low speed high load working condition or anxious accelerating mode by aeration valve in cylinder, increase fresh charge in cylinder, thus motor discharge under improving the power character of motor under these two kinds of operating modes and reducing these two kinds of operating modes.
The gas pressure that described motor tonifying Qi pressurization system is ensured in the second low pressure gasholder by reduction valve can not cause hypotony because of tonifying Qi process, simultaneously also can not be too fast because of the too high tonifying Qi process consumed cabin air quality that causes of the second low pressure gasholder tank internal pressure.
The controlling method of described variable phase exhaust valve is: when hydraulic circuit control valve is descending open time, hydraulic oil enters pipeline and free-flow from hydraulically-controlled one-way valve, cam driven rocker arm displaces push rod upper half part is moved, push rod head is withstood valve under the action of the spring but is not synchronized with the movement with push rod upper half part, valve under the effect of customary cam rocker structure in engine exhaust strokes time open; Described hydraulic circuit control valve is up when blinding off a line, enclosed space is formed in pipeline between hydraulically-controlled one-way valve to hydraulic circuit control valve, push rod upper half part with move together with hydraulic pressure between push rod head, the whole push rod motion of cam driven rocker arm displaces, push rod head promotes valve and opens latter stage at engine compression strokes.
Described hydraulic circuit control valve, after car brakeing instruction sends, motor additionally runs the signal correction of two work cycle March Shaft angles, and terminate at normal exhaust stroke afterwards, close after exhaust valve closing, to reduce the residual gas in cylinder, ensure that adjustable clearance push rod is in correct phase place simultaneously.
The guiding theory of technique scheme is: by turbosupercharging pressurized air reclaiming system, to originally be re-used by the exhaust energy that turbosupercharger exhaust gas valve bypass is fallen and be converted into extra air inflow and reclaimed storage, pass through brake energy recovering system afterwards, be the compression energy of air by the kinetic transformation of engine piston during car brakeing, the compressed-air actuated pressure of further raising and quality are also stored, the cylinder of motivation of the blast injection of storage being seted out finally by low engine speed air compensating system, improve motor low speed is anxious and accelerate or the power character of low speed high load working condition, discharge under reducing these two kinds of operating modes simultaneously.
Beneficial effect of the present invention: this turbosupercharged engine pressurized air reclaims and air compensating system utilizes motor complementary energy, and be converted into compressed-air actuated pressure energy, finally utilize this part pressurized air by the mode of tonifying Qi, improve motor low speed is anxious and accelerate or the power character of low speed high load working condition, discharge under reducing these two kinds of operating modes simultaneously.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be described
Fig. 1 is that turbosupercharged engine reclaims pressurized air and air compensating system.
Fig. 2 is the execution architecture of variable phase exhaust valve
In figure: 1. piston, 2. cylinder, 3. the first low pressure gasholder, 4. adjustable opening solenoid valve, 5. snifting valve, 6. turbocharger air compressor end, 7. turbocharger turbine end, 8. variable phase exhaust valve, 9. butterfly valve, 10. aeration valve, 11. one-way valves, 12. reduction valve, 13. second low pressure gasholders, 14. high pressure tanks, 15. exhaust valves, 16. push rod head, 17. springs, 18. hydraulically-controlled one-way valves, 19. push rod upper half part, 20. rocking arms, 21. cams, 22. hydraulic circuit control valves.
Embodiment
As depicted in figs. 1 and 2, a kind of turbosupercharged engine pressurized air reclaims and air compensating system comprises turbosupercharging pressurized air reclaiming system, engine compressed air auxiliary braking system, motor air compensating system, wherein turbosupercharging pressurized air reclaiming system is connected with engine compressed air auxiliary braking system by snifting valve 5, and engine compressed air auxiliary braking system is connected with air compensating system by reduction valve 12.
Described turbosupercharging pressurized air reclaiming system comprises turbosupercharger, adjustable opening solenoid valve 4, first low pressure gasholder 3, snifting valve 5; Adjustable opening solenoid valve 4 one end is connected with the engine intake manifold after turbosupercharger, the other end is connected with the first low pressure gasholder 3, the snifting valve 5 that first low pressure gasholder 3 is covered by pipeline and engine cylinder is connected, described turbosupercharger is formed by connecting by coupling shaft by turbocharger air compressor end 6 and turbocharger turbine end 7, supercharger air compressor end 6 is connected with intake manifold, and turbocharger turbine end 7 is connected with outlet pipe.
Described engine compressed air auxiliary braking system comprises cylinder 2, piston 1, variable phase exhaust valve 8, butterfly valve 9, one-way valve 11, high pressure tank 14; Piston 1 is positioned at cylinder 2, and variable phase exhaust valve 8 is positioned at cylinder 2 upper wall, and butterfly valve 9 is positioned on outlet pipe, and one-way valve 11 one end is connected with the outlet pipe between variable phase exhaust valve 8 and butterfly valve 9, and the other end is connected with high pressure tank 14.
Described variable phase exhaust valve 8 comprises cam 21, rocking arm 20, push rod upper half part 19, spring 17, push rod head 16, exhaust valve 15, hydraulically-controlled one-way valve 18 and hydraulic circuit control valve 22; Cam 21 contacts with rocking arm 20 one end; rocking arm 20 the other end contacts with push rod upper half part 19; push rod upper half part 19 is connected with push rod head 16 by spring 17, and push rod head 16 directly contacts with exhaust valve 15, is filled between hydraulically-controlled one-way valve 18 and hydraulic circuit control valve 22 by hydraulic oil.
Described motor air compensating system comprises reduction valve 12, second low pressure gasholder 13 and aeration valve 10; Second low pressure gasholder 13 one end is connected with high pressure tank 14 by reduction valve 12, and one end is connected with cylinder 2 by aeration valve 10.
When motor moves to high speed high load working condition, because exhaust energy is now larger, the outlet gas pressure of the gas compressor end 6 of turbosupercharger also can correspondingly increase, in order to prevent, gas compressor end 6 outlet gas pressure of turbosupercharger is excessive causes adverse effect to engine cylinder internal procedure, usual turbosupercharger is all furnished with an exhaust gas valve, the pressure sensitive anatomical connectivity of exhaust gas valve one end the outlet of turbocharger air compressor end 6, the valve mechanism of its other end is then arranged in the ingress of turbocharger turbine end 7, when the pressure sensitive structure detection of exhaust gas valve to the gas pressure of turbocharger air compressor end 6 higher than time default, it can open the valve mechanism of turbine end 7 entrance gradually, by a part of engine exhaust from turbine end 7 bypass, thus the exhaust energy that minimizing turbine end 7 can be recovered to, and then reduce the outlet pressure of gas compressor end 6, the engine exhaust energy of part is had because could not be recovered from turbine end 7 bypass in this process.The part that turbosupercharging pressurized air reclaiming system will reclaim in the exhaust energy of this part loss, when being in the operating mode that exhaust gas valve is opened, the adjustable opening solenoid valve 4 of turbosupercharging pressurized air reclaiming system will be opened prior to exhaust gas valve, Partial shrinkage air is introduced the first low pressure gasholder 3 to store, now should still be flow through by the waste gas of bypass the wheel rotation that turbine end 7 promotes turbine, simultaneously the gas of blower outlet stores because there is part to be introduced into the first low pressure gasholder 3 and makes pressure can not be too high, this process is until terminate when reservoir pressure rises to similar to intake manifold, exhaust gas valve will be opened to continue to maintain compressor delivery pressure.
When car brakeing, auxiliary engine braking is also reclaimed the kinetic energy of piston 1 simultaneously and is stored with the pressure energy form of air by engine braking energy-recuperation system.In car brakeing process, when piston 1 moves to lower dead center, during IC Intake Valve Closes, the air of pressure a little less than atmospheric pressure is full of in cylinder 2, now open the snifting valve 5 be connected with the first low pressure gasholder 3, by the blast injection inlet casing 2 be recovered to from intake manifold, thus the quality of gas in the jar and pressure are all got a promotion, the up pressurized air of back piston 1, be the pressure energy of gas by kinetic transformation, in the latter stage of compression stroke, variable phase exhaust valve 8 is opened and is discharged cylinder 2 by by the air compressed, butterfly valve 9 now on outlet pipe cuts out, pressurized air enters high pressure tank 14 by one-way valve 11 and stores.
When motor operate in low speed anxious accelerate or low speed large load time, the air demand of turbosupercharger cannot meet the air inflow demand of motor, and power character and discharge now can be caused to decline, and motor tonifying Qi pressurization system is for improving this situation.High pressure tank 14 carries pressurized air by reduction valve 12 to the second low pressure gasholder 13, and the gas pressure maintained in the second low pressure gasholder 13, when motor is in the anxious acceleration of low speed or low speed high load working condition, aspirating stroke latter stage is moved at engine piston 1, during IC Intake Valve Closes, by aeration valve 12 by the blast injection inlet casing in the second low pressure gasholder 13 to increase air quality in cylinder, improve burning, promote output power, reduce discharge.
Described variable phase exhaust valve except by except the cam follower structure control on original motor, also by the cam follower structure co-controlling of a set of hydraulic control.When motor is in normal working, now hydraulic circuit control valve 22 is in open mode, owing to there is no hydraulic pressure, push rod head 16 and push rod upper half part 19 unsynchronized revolution, push rod head 16 is close to exhaust valve 15 but is not produced active force under spring 17 acts on, exhaust valve 15 under former cam rocker arm structure function in engine exhaust strokes time open.When motor is in auxiliary braking state, now hydraulic circuit control valve 22 is in closed condition, airtight hydraulic circuit is formed from hydraulic circuit control valve 22 to hydraulically-controlled one-way valve 18, due to the incompressibility of liquid, at hydraulic pressure, next plays motion to push rod upper half part 19 with push rod head 16, by the Movement transmit of cam 21 and rocking arm 20 to exhaust valve 15, thus exhaust valve 15 was opened in the latter stage of former compression stroke make pressurized air be pushed out cylinder 2.
Described hydraulic circuit control valve 22, after car brakeing instruction sends, motor additionally runs the signal correction of two work cycle March Shaft angles, and terminate at normal exhaust stroke afterwards, close after exhaust valve closing, to reduce the residual gas in cylinder 2, ensure that adjustable clearance push rod is in correct phase place simultaneously.
Claims (10)
1. a turbosupercharged engine pressurized air reclaims and air compensating system, it is characterized in that: comprise turbosupercharging pressurized air reclaiming system, engine compressed air auxiliary braking system, motor air compensating system, wherein turbosupercharging pressurized air reclaiming system is connected with engine compressed air auxiliary braking system by snifting valve (5), and engine compressed air auxiliary braking system is connected with air compensating system by reduction valve (12).
2. a kind of turbosupercharged engine pressurized air according to claim 1 reclaims and air compensating system, it is characterized in that described turbosupercharging pressurized air reclaiming system comprises turbosupercharger, adjustable opening solenoid valve (4), the first low pressure gasholder (3), snifting valve (5); Adjustable opening solenoid valve (4) one end is connected with the engine intake manifold after turbosupercharger, the other end is connected with the first low pressure gasholder (3), the snifting valve (5) that first low pressure gasholder (3) is covered by pipeline and engine cylinder is connected, described turbosupercharger is formed by connecting by coupling shaft by turbocharger air compressor end (6) and turbocharger turbine end (7), supercharger air compressor end (6) is connected with intake manifold, and turbocharger turbine end (7) is connected with outlet pipe.
3. a kind of turbosupercharged engine pressurized air according to claim 1 reclaims and air compensating system, it is characterized in that described engine compressed air auxiliary braking system comprises cylinder (2), piston (1), variable phase exhaust valve (8), butterfly valve (9), one-way valve (11), high pressure tank (14); Piston (1) is positioned at cylinder (2), variable phase exhaust valve (8) is positioned at cylinder (2) upper wall, butterfly valve (9) is positioned on outlet pipe, one-way valve (11) one end is connected with the outlet pipe be positioned between variable phase exhaust valve (8) and butterfly valve (9), and the other end is connected with high pressure tank (14).
4. a kind of turbosupercharged engine pressurized air according to claim 3 reclaims and air compensating system, it is characterized in that described variable phase exhaust valve (8) comprises cam (21), rocking arm (20), push rod upper half part (19), spring (17), push rod head (16), exhaust valve (15), hydraulically-controlled one-way valve (18) and hydraulic circuit control valve (22); Cam (21) contacts with rocking arm (20) one end; rocking arm (20) the other end contacts with push rod upper half part (19); push rod upper half part (19) is connected with push rod head (16) by spring (17); push rod head (16) directly contacts with exhaust valve (15), is filled between hydraulically-controlled one-way valve (18) and hydraulic circuit control valve (22) by hydraulic oil.
5. a kind of turbosupercharged engine pressurized air according to claim 1 reclaims and air compensating system, it is characterized in that described motor air compensating system comprises reduction valve (12), the second low pressure gasholder (13) and aeration valve (10); Second low pressure gasholder (13) one end is connected with high pressure tank (14) by reduction valve (12), and one end is connected with cylinder (2) by aeration valve (10).
6. one kind as claimed in claim 1 system turbosupercharged engine pressurized air reclaim and supplementing method for air, it is characterized in that comprising turbosupercharging pressurized air recovery method, engine braking pressurized air recovery method and motor supplementing method for air, described turbosupercharging pressurized air recovery method is a kind of recovery by low-pressure gas and the method stored, engine braking pressurized air recovery method is a kind of mixing with additional air by aforementioned low-pressure gas and the method for further pressurized storage, motor supplementing method for air a kind of pressurized air supplemented inlet casing (2) for motor and provide the method for extra fresh air.
7. method according to claim 6, it is characterized in that described turbosupercharging pressurized air recovery method is: when the exhaust gas valve of turbocharger turbine end (7) is about to open because of engine back pressure is excessive but opens not yet, regulating aperture solenoid valve (4) to open in advance makes Partial shrinkage air be filled with the first low pressure gasholder (3), when gas pressure in low pressure gasholder rises and moves closer to gas pressure in intake manifold, aperture solenoid valve (4) is regulated to close gradually, simultaneously the pressure stability that maintains in intake manifold opened by the exhaust gas valve of turbocharger turbine end (7).
8. method according to claim 6, it is characterized in that the method that described engine braking pressurized air reclaims is: when vehicle is in damped condition, piston (1) moves to aspirating stroke lower, when intake valve is closed, by snifting valve (5), the pressurized air in the first low pressure gasholder (3) is sprayed into cylinder (2), pressurized air and original air inlet mixed being incorporated in compression stroke in cylinder (2) is collapsed into more pressurized gas further by piston (1), open at compression stroke variable phase in latter stage exhaust valve (8), butterfly valve (9) cuts out, pressurized gas discharge cylinder (2), and enter high pressure tank (14) by one-way valve (11).
9. method according to claim 6, it is characterized in that the method for described motor tonifying Qi is: pressurized gas enter the second low pressure gasholder (13) by reduction valve (12), maintain the second low pressure gasholder (13) tank internal pressure, second low pressure gasholder (13) sprays pressurized air when motor is in low speed high load working condition or anxious accelerating mode by aeration valve (10) in cylinder (2), increases fresh charge in cylinder.
10. the controlling method of a variable phase exhaust valve as claimed in claim 4, it is characterized in that: when hydraulic circuit control valve (22) is descending open time, hydraulic oil enters pipeline and free-flow from hydraulically-controlled one-way valve (18), cam (21) drives rocking arm (20) to promote push rod upper half part (19) motion, push rod head (16) is withstood valve (15) but is not synchronized with the movement with push rod upper half part (19) under spring (17) effect, valve (15) under the effect of customary cam rocker structure in engine exhaust strokes time open, described hydraulic circuit control valve (22) is up when blinding off a line, enclosed space is formed in pipeline between hydraulically-controlled one-way valve (18) to hydraulic circuit control valve (22), move together with hydraulic pressure between push rod upper half part (19) with push rod head (16), cam (21) drives rocking arm (20) to promote the motion of whole push rod, and push rod head (16) promotes valve (15) and opens latter stage at engine compression strokes.
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| CN106555719A (en) * | 2015-09-29 | 2017-04-05 | 日立汽车系统(苏州）有限公司 | Electromotor additional-air inlet system and its control method and engine system |
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| CN107490475A (en) * | 2017-09-19 | 2017-12-19 | 福州大学 | A kind of turbocharger performance testing stand and test method with exhaust energy recovery |
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