CN105422324A - Device for realizing high-low-pressure EGR (exhaust gas recirculation) controllable introduction - Google Patents
Device for realizing high-low-pressure EGR (exhaust gas recirculation) controllable introduction Download PDFInfo
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- CN105422324A CN105422324A CN201510974032.6A CN201510974032A CN105422324A CN 105422324 A CN105422324 A CN 105422324A CN 201510974032 A CN201510974032 A CN 201510974032A CN 105422324 A CN105422324 A CN 105422324A
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Abstract
The invention discloses a device for realizing high-low-pressure EGR (exhaust gas recirculation) controllable introduction, and the device aims to solve the problem that high-low-pressure EGR controllable introduction into an air cylinder cannot be realized at present. The device comprises an engine (1), a turbine (5), an EGR valve (7), a gas compressor (10), a cooler (12) and a throttle valve (13), wherein a gas inlet end of the turbine (5) is in pipeline connection with a gas exhaust manifold (3) in the engine (1); a gas inlet A of the EGR valve (7) is in pipeline connection with the engine (1); a gas outlet C of the EGR valve (7) is in pipeline connection with a gas inlet end of the gas compressor (10); a gas outlet end of the gas compressor (10) is in pipeline connection with a gas inlet of the cooler (12); a gas outlet of the cooler (12) is in pipeline connection with one end of the throttle valve (13); the other end of the throttle valve (13) is in pipeline connection with the engine (1); a gas outlet B of the EGR valve (7) is in pipeline connection with a gas inlet manifold (14); and the turbine (5) is connected to the gas compressor (10) by virtue of a rotor.
Description
Technical field
The present invention relates to a kind of EGR (EGR) leading device on motor, or rather, the present invention relates to one and realize the controlled leading device of high and low pressure EGR.
Background technique
Along with the increasingly stringent of Abgasgesetz, the control for emissions from engines NOx emission is especially strict.EGR technology is one of main key technology controlling NOx emission.
EGR and gas recirculation system, refer to and a part for the exhaust of motor introduced in cylinder again, affect burning by waste gas, thus reach the effect reducing NOx.Its working mechanism is as follows:
1. contain a large amount of N in waste gas
2and CO
2deng inert gas, oxygen concentration in cylinder can be reduced, the generation of restriction NOx;
2. cycle gas dilutes ozone, slow down combustion rate, can reduce maximum combustion temperature and maximum combustion pressure;
3. H in waste gas
2o (steam) and CO
2gas etc. are three atomic gas, make gas in the jar specific heat capacity become large, reduce maximum combustion temperature in cylinder.
At present, the EGR on motor mainly adopts outside EGR.Outside EGR is very little to the change of motor, and is also easier to realize for the control of EGR gas flow, is the selection of most of EGR engine on market.Outside EGR is divided into again high pressure EGR passage and exhaust passage.High pressure EGR passage, guides to blower outlet by waste gas, not by gas compressor and intercooler, avoids EGR with working conditions change response lag simultaneously, can warming-up rapidly when engine cold-start.Exhaust passage, guides to compressor inlet by waste gas, easily obtains suitable pressure reduction, in larger operating range, easily realizes EGR.The scheme of current high and low pressure binary channel EGR, device more complicated, needs two cover egr systems, causes pipeline complicated, assembling difficulty, and high low pressure two overlaps EGR passage all needs EGR valve, and manufacture cost is higher.Do not find that a kind of simple EGR device can realize the controlled leading device of high and low pressure EGR with working conditions change.
It is CN104791148A that Chinese patent announces (opening) number, announcing (opening) day is on July 22nd, 2015, denomination of invention is " a kind of low pressure EGR leading device and low pressure EGR introducing method realizing large EGR rate ", application number is CN201510188412.7, and this patent of invention discloses a kind of the low pressure EGR leading device and the low pressure EGR introducing method that realize large EGR rate.Two-way EGR waste gas is incorporated into gas compressor upstream by an electrically-controlled valve by the program, forms low pressure EGR scheme.In the program, two-way EGR waste gas shares an EGR valve and a cooler for recycled exhaust gas, and structure is simple, decreases intercooler quantity, low cost of manufacture.But this device can only realize the introducing of low pressure EGR, the introducing of high pressure EGR can not be realized; And two-way EGR waste gas is all through supercooler, when engine cold-start, can not promptly warming-up.
Summary of the invention
Technical problem to be solved by this invention overcomes prior art to there is the problem that can not realize the controlled introducing cylinder of high and low pressure EGR, provides one and realize the controlled leading device of high and low pressure EGR.
For solving the problems of the technologies described above, the present invention adopts following technological scheme to realize: described one realizes the controlled leading device of high and low pressure EGR and comprises motor, turbo machine, EGR valve, gas compressor, cooler and closure.
The suction port end of turbo machine is connected with engine pipelines, the suction port A of EGR valve is connected with engine exhaust end pipeline, the air outlet C of EGR valve is connected with the suction port end pipeline of gas compressor, the air outlet end of gas compressor is connected with the suction port end pipeline of cooler, the air outlet end of cooler is connected with one end pipeline of closure, the other end of closure is connected with engine pipelines, and the air outlet B of EGR valve is connected with intake manifold suction port end pipeline, and turbo machine is connected by rotor with gas compressor.
The suction port end of the turbo machine described in technological scheme is connected with engine pipelines, the suction port A of EGR valve is connected with the exhaust end pipeline of motor and refers to: the suction port end of turbo machine is connected with one end of outlet pipe, the other end of outlet pipe is connected with the air outlet end of the gas exhaust manifold in motor, one end of EGR pipe is connected with the air outlet end of gas exhaust manifold, and the other end of EGR pipe is connected with the suction port A of EGR valve.
The outlet C of the EGR valve (7) described in technological scheme is connected with the suction port end pipeline of gas compressor, the air outlet end of gas compressor is connected with the suction port end pipeline of cooler (12), the air outlet B of EGR valve is connected with intake manifold (14) suction port end pipeline and refers to: the air outlet C of EGR valve and one end of low pressure EGR pipe connect, the other end of low pressure EGR pipe is connected with the suction port end of gas compressor, the air outlet end of gas compressor is connected with one end of suction tude, and the other end of suction tude is connected with the suction port end of cooler; The air outlet B of EGR valve is connected with one end of high pressure EGR pipe, and the other end of high pressure EGR pipe is connected with the suction port end of intake manifold.
EGR valve described in technological scheme is an electric T-shaped valve, comprises motor, spool, valve rod, valve gap, sealing gasket, valve body and position transducer.Spool and valve rod are all cylindrical structural part, and spool and valve rod are connected for ladder shaft type structural member coaxially, the equal diameters of the diameter of spool and the vertical center valve opening of valve body, the equal diameters of the center hole on the diameter of valve rod and valve gap; Spool loads in valve body for being rotationally connected, valve gap, sealing gasket from top to bottom are sleeved on valve rod, for being rotationally connected between valve gap and valve rod, bolt is adopted valve gap, sealing gasket to be fixed on the top of valve body, motor is coaxially connected with valve rod, position transducer is arranged on valve body, and the mobile terminal of position transducer is fixedly connected with valve rod.
Valve body described in technological scheme is the housing member of hollow cuboid shape, valve body center is provided with the vertical center valve opening installing spool, the left wall of valve body, antetheca and right wall are respectively arranged with cirque body formula interface, namely be air outlet C, suction port A and air outlet B successively, the center hole of three interfaces is communicated with vertical center valve opening, the rotational axis of the center hole of three interfaces is in together in a horizontal plane, the rotational axis conllinear of air outlet C and air outlet B, the rotational axis of suction port A is vertical with the rotational axis of air outlet B with air outlet C.
Compared with prior art the invention has the beneficial effects as follows:
1. one of the present invention realizes the controlled leading device of high and low pressure EGR and can realize the controlled introducing of high and low pressure EGR;
2. a kind of high and low pressure EGR passage realized in the controlled leading device of high and low pressure EGR of the present invention shares an EGR valve, saves manufacture cost;
3. of the present inventionly a kind ofly realize the cooling system of EGR in the controlled leading device of high and low pressure EGR and the cooling system of air inlet uses a cooler jointly, provide cost savings, save space, be convenient to be arranged on vehicular engine.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is a kind of structural principle schematic diagram realizing the controlled leading device of high and low pressure EGR of the present invention;
Fig. 2 is the whole-cutaway view on the plan view of a kind of EGR valve realizing adopting in the controlled leading device of high and low pressure EGR of the present invention when not introducing EGR gas;
Fig. 3 is the whole-cutaway view on the plan view of a kind of EGR valve realizing adopting in the controlled leading device of high and low pressure EGR of the present invention when not introducing EGR gas;
Fig. 4 is the structural principle schematic diagram of a kind of high pressure EGR passage part realized in the controlled leading device of high and low pressure EGR of the present invention;
Fig. 5 is a kind of whole-cutaway view when realizing adopting high pressure EGR in the controlled leading device of high and low pressure EGR on EGR valve plan view of the present invention;
Fig. 6 is the structural principle schematic diagram of a kind of exhaust passage part realized in the controlled leading device of high and low pressure EGR of the present invention;
Fig. 7 is a kind of whole-cutaway view when realizing adopting low pressure EGR in the controlled leading device of high and low pressure EGR on EGR valve plan view of the present invention;
In figure: 1. motor, 2. cylinder, 3. gas exhaust manifold, 4. outlet pipe, 5. turbo machine, 6.EGR manages, 7.EGR valve, 8. high pressure EGR pipe, 9. low pressure EGR pipe, 10. gas compressor, 11. suction tude, 12. coolers, 13. closures, 14. intake manifold, 15. spools, 16. valve rods, 17. valve gaps, 18. sealing gaskets, 19. valve bodies.
Embodiment
Below in conjunction with accompanying drawing, the present invention is explained in detail:
Consult Fig. 1, one of the present invention realizes the controlled leading device of high and low pressure EGR and comprises motor 1, turbo machine 5, EGR valve 7, gas compressor 10, cooler 12, closure 13 and pipeline.Described pipeline comprises outlet pipe 4, EGR pipe 6, high pressure EGR pipe 8, low pressure EGR pipe 9 and suction tude 11; Motor 1 comprises cylinder 2, gas exhaust manifold 3 and intake manifold 14.
Consult Fig. 2 and Fig. 3, described EGR valve 7 is electric T-shaped valves, comprises motor, spool 15, valve rod 16, valve gap 17, sealing gasket 18, valve body 19 and position transducer;
Described valve body 19 is the housing member of hollow cuboid shape, valve body 19 center is provided with the vertical center valve opening installing spool 15, the left wall of valve body 19, antetheca and right wall are respectively arranged with cirque body formula interface, namely be air outlet C, suction port A and air outlet B successively, the center hole of three interfaces is communicated with vertical center valve opening, the rotational axis of the center hole of three interfaces is in together in a horizontal plane, the rotational axis conllinear of air outlet C and air outlet B, the rotational axis of suction port A is vertical with the rotational axis of air outlet B with air outlet C.
Spool 15 and valve rod 16 are all cylindrical structural part, spool 15 and valve rod 16 are connected for ladder shaft type structural member (also can be made of one part) coaxially, the equal diameters of the diameter of spool 15 and the vertical center valve opening of valve body 19, the equal diameters of the center hole on the diameter of valve rod 16 and valve gap 17;
Spool 15 loads in valve body 19 for being rotationally connected, valve gap 17, sealing gasket 18 are sleeved on valve rod 16 from top to bottom, for being rotationally connected between valve gap 17 and valve rod 16, valve gap 17, sealing gasket 18 and valve body 19 are followed successively by contact and connect, and adopt bolt valve gap 17, sealing gasket 18 to be fixed on the top of valve body 19; Motor is coaxially connected with valve rod, and position transducer is arranged on valve body 19, and the mobile terminal of position transducer is fixedly connected with valve rod 16.
The air outlet B of described EGR valve 7 is connected with high pressure EGR pipe 8; The air outlet C of EGR valve 7 is connected with low pressure EGR pipe 9.Motor-driven valve bar 16 rotates and makes spool 15 adjust the flow direction of EGR gas and the aperture of valve, and the position transducer that EGR valve 7 configures can feed back and carry out flow control.State when Fig. 2 and Fig. 3 be not for introducing EGR gas residing for EGR valve 7, namely two outlets are all blocked by spool 15, make EGR gas not by.
The suction port end of turbo machine 5 is connected with one end of outlet pipe 4, the other end of outlet pipe 4 is connected with the air outlet end of the gas exhaust manifold 3 in motor 1, one end of EGR pipe 6 is connected with the middle of outlet pipe 4, the other end of EGR pipe 6 is connected with the suction port A of EGR valve 7, the air outlet C of EGR valve 7 is connected with one end of low pressure EGR pipe 9, the other end of low pressure EGR pipe 9 is connected with the suction port end of gas compressor 10, the air outlet end of gas compressor 10 is connected with one end of suction tude 11, the other end of suction tude 11 is connected with the suction port end of cooler 12, the air outlet end of cooler 12 is connected with one end of closure 13, the other end of closure 13 is connected with the suction port end of the intake manifold 14 in motor 1, the air outlet B of EGR valve 7 is connected with one end of high pressure EGR pipe 8, the other end of high pressure EGR pipe 8 is connected with the suction port end of intake manifold 14, turbo machine 5 is connected by rotor with gas compressor 10, the relief opening of turbo machine 5 is connected with three-way catalytic converter, the suction port of gas compressor 10 is connected with air-strainer.
Consult Fig. 4 and Fig. 5, under motor 1 cold start-up and idling operation, adopt high pressure EGR, motor-driven valve bar 16 rotational valve core 15, EGR pipe 6 is made to be connected (as Fig. 5) with high pressure EGR pipe 8, waste gas is introduced between intake manifold 14 suction port end and closure 13, is namely communicated with high pressure EGR passage.High pressure EGR pipe 8 does not have cooler, and waste gas directly can enter cylinder 2 fast lifting intake temperature, plays warming-up effect, effectively improves the discharge of motor under motor 1 cold start-up and idling operation.By rotation valve rod 16, spool 15, regulate B discharge area, thus EGR gas can be regulated to enter the flow of high pressure EGR pipe 8.
Consult Fig. 6 and Fig. 7, when the large load operation of motor 1, adopt low pressure EGR, motor-driven valve bar 16 rotational valve core 15, EGR pipe 6 is connected with low pressure EGR pipe 9 (as Fig. 7), and waste gas is introduced in the suction port end of gas compressor 10, is namely communicated with exhaust passage.The suction port end that EGR waste gas is introduced in gas compressor 10 easily obtains larger pressure reduction, can realize larger EGR rate.EGR waste gas cools through supercooler 12 together with air, and temperature is lower, can effectively reduce in-cylinder combustion temperature and oxygen content, thus realizes the effective control to the NOx emission of motor 1.By rotation valve rod 16, spool 15, regulate C discharge area, thus EGR gas can be regulated to enter the flow of low pressure EGR pipe 9.
Claims (5)
1. one kind realizes the controlled leading device of high and low pressure EGR, it is characterized in that, described one realizes the controlled leading device of high and low pressure EGR and comprises motor (1), turbo machine (5), EGR valve (7), gas compressor (10), cooler (12) and closure (13);
The suction port end of turbo machine (5) is connected with motor (1) pipeline, the suction port A of EGR valve (7) is connected with motor (1) exhaust end pipeline, the air outlet C of EGR valve (7) is connected with the suction port end pipeline of gas compressor (10), the air outlet end of gas compressor (10) is connected with the suction port end pipeline of cooler (12), the air outlet end of cooler (12) is connected with one end pipeline of closure (13), the other end of closure (13) is connected with motor (1) pipeline, the air outlet B of EGR valve (7) is connected with intake manifold (14) suction port end pipeline, turbo machine (5) is connected by rotor with gas compressor (10).
2. realize the controlled leading device of high and low pressure EGR according to one according to claim 1, it is characterized in that, the suction port end of described turbo machine (5) is connected with motor (1) pipeline, and the suction port A of EGR valve (7) is connected with motor (1) exhaust end pipeline and refers to:
The suction port end of turbo machine (5) is connected with one end of outlet pipe (4), the other end of outlet pipe (4) is connected with the air outlet end of the gas exhaust manifold (3) in motor (1), one end of EGR pipe (6) is connected with the air outlet end of gas exhaust manifold (3), and the other end of EGR pipe (6) is connected with the suction port A of EGR valve (7).
3. realize the controlled leading device of high and low pressure EGR according to one according to claim 1, it is characterized in that, the air outlet C of described EGR valve (7) is connected with the suction port end pipeline of gas compressor (10), the air outlet end of gas compressor (10) is connected with the suction port end pipeline of cooler (12), and the air outlet B of EGR valve (7) is connected with intake manifold (14) suction port end pipeline and refers to:
The air outlet C of EGR valve (7) is connected with one end of low pressure EGR pipe (9), the other end of low pressure EGR pipe (9) is connected with the suction port end of gas compressor (10), the air outlet end of gas compressor (10) is connected with one end of suction tude (11), and the other end of suction tude (11) is connected with the suction port end of cooler (12); The air outlet B of EGR valve (7) is connected with one end of high pressure EGR pipe (8), and the other end of high pressure EGR pipe (8) is connected with the suction port end of intake manifold (14).
4. realize the controlled leading device of high and low pressure EGR according to one according to claim 1, it is characterized in that, described EGR valve (7) is an electric T-shaped valve, comprises motor, spool (15), valve rod (16), valve gap (17), sealing gasket (18), valve body (19) and position transducer;
Spool (15) and valve rod (16) are all cylindrical structural part, spool (15) and valve rod (16) are connected for ladder shaft type structural member coaxially, the equal diameters of the diameter of spool (15) and the vertical center valve opening of valve body (19), the equal diameters of the center hole on the diameter of valve rod (16) and valve gap (17);
Spool (15) loads in valve body (19) for being rotationally connected, valve gap (17), sealing gasket (18) are sleeved on valve rod (16) from top to bottom, for being rotationally connected between valve gap (17) and valve rod (16), bolt is adopted valve gap (17), sealing gasket (18) to be fixed on the top of valve body (19), motor is coaxially connected with valve rod (16), position transducer is arranged on valve body (19), and the mobile terminal of position transducer is fixedly connected with valve rod (16).
5. realize high according to one according to claim 4, the controlled leading device of low pressure EGR, it is characterized in that, the housing member that described valve body (19) is hollow cuboid shape, valve body (19) center is provided with the vertical center valve opening installing spool (15), the left wall of valve body (19), antetheca and right wall are respectively arranged with cirque body formula interface, namely be air outlet C successively, suction port A and air outlet B, the center hole of three interfaces is communicated with vertical center valve opening, the rotational axis of the center hole of three interfaces is in together in a horizontal plane, the rotational axis conllinear of air outlet C and air outlet B, the rotational axis of suction port A is vertical with the rotational axis of air outlet B with air outlet C.
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| CN201510974032.6A CN105422324A (en) | 2015-12-23 | 2015-12-23 | Device for realizing high-low-pressure EGR (exhaust gas recirculation) controllable introduction |
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Cited By (3)
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| CN111033028A (en) * | 2017-08-25 | 2020-04-17 | 马自达汽车株式会社 | Engine air intake system |
| US11255297B2 (en) | 2017-06-30 | 2022-02-22 | Volvo Truck Corporation | Vehicle system and a method for such vehicle system |
| CN117418969A (en) * | 2023-12-18 | 2024-01-19 | 潍柴动力股份有限公司 | EGR system and control method thereof |
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Application publication date: 20160323 |