CN105569885A - Exhaust gas recirculation (EGR) system - Google Patents
Exhaust gas recirculation (EGR) system Download PDFInfo
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- CN105569885A CN105569885A CN201610114294.XA CN201610114294A CN105569885A CN 105569885 A CN105569885 A CN 105569885A CN 201610114294 A CN201610114294 A CN 201610114294A CN 105569885 A CN105569885 A CN 105569885A
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Abstract
The invention discloses an exhaust gas recirculation (EGR) system. The EGR system comprises an EGR valve gas-intake adapter pipe, an EGR valve gas-exhaust pipe, an EGR valve and an EGR valve temperature control valve, wherein the outer end of the EGR valve gas-intake adapter pipe is fixedly mounted in an EGR outlet of an engine gas-exhaust pipe; the outer end of the EGR valve gas-exhaust pipe is connected with an EGR inlet of an engine gas-intake pipe through an EGR valve gas-exhaust adapter pipe; the EGR valve is fixed to the inner end of the EGR valve gas-intake adapter pipe and the inner end of the EGR valve gas-exhaust pipe, and the EGR valve is connected to the interior of the engine gas-intake pipe through a positive pressure gas-intake hose; the EGR valve temperature control valve is arranged on the positive pressure gas-intake hose and an engine water-draining header pipe; the EGR valve and the EGR valve temperature control valve are in a closed state on normal circumstances. According to the EGR system, temperature of exhaust gas is decreased by air cooling, the EGR valve is opened through gas-intake positive pressure and water temperature of an engine, so that the national emission rules are followed while the valve is effectively opened in an electric-control common-rail diesel engine.
Description
Technical field
The present invention relates to engine exhaust emission field, particularly a kind of gas recirculation system.
Background technique
In the face of day by day serious environmental pollution problem, country proposes many effective resolutions, and wherein propose the laws and regulations requirement meeting T3 discharge for non-rice habitats diesel engine, namely diesel emission levels again reduces on existing basis.
In order to meet the emission request of T3, non-rice habitats diesel engine needs to increase gas recirculation system (EGR) and optimizes engine working process, existing egr system many employings water cooling reduces the mode of exhaust gas temperature, need the cooler for recycled exhaust gas that layout is more complicated, volume is slightly large, should consider that waste gas is from exhaust side to air inlet side circulation, also will ensure that waterway circulating can effectively reduce the temperature of waste gas simultaneously.This system takes up room in process greatly in layout, complex structure is not compact, later maintenance is inconvenient and cost is higher.
The information being disclosed in this background technique part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The object of the present invention is to provide a kind of simple and reasonable gas recirculation system, this gas recirculation system adopts the mode of air cooling exhaust gas temperature, decrease and for the cooler for recycled exhaust gas of cooled exhaust air and arranging EGR cooling water channel overall engine to be arranged and the impact of performance, what whole egr system was become is simpler, it is more convenient to install, and reduces the rate of fault of whole system simultaneously.And the unlatching of EGR valve adopts the unfolding mode of air inlet malleation and engine water temperature double action, in electric-controlled co-rail diesel engine, ensure while can effectively opening to meet national Abgasgesetz.
For achieving the above object, the invention provides a kind of gas recirculation system, this gas recirculation system comprises: EGR valve air inlet tube, and its outer end is fixed on engine exhaust pipe EGR waste gas outlet; EGR valve steam outlet pipe, its outer end is connected with engine air inlet tube EGR waste gas inlet by EGR valve outgoing gas connection tube; EGR valve, it is fixed on the inner of described EGR valve air inlet tube and EGR valve steam outlet pipe, and by positive pressure pressure air induction hose access engine air inlet tube; And EGR valve thermostat valve, it is arranged on this positive pressure pressure air induction hose and engine water outlet house steward, described EGR valve and EGR valve thermostat valve are in closed condition under normal circumstances, make the unlatching of EGR valve adopt the unfolding mode of air inlet malleation and engine water temperature double action.
Preferably, in technique scheme, EGR valve steam outlet pipe is fixed by EGR valve steam outlet pipe Duct fixing clamp.
Preferably, in technique scheme, EGR valve steam outlet pipe adopts thin-wall stainless steel.
Preferably, in technique scheme, EGR valve steam outlet pipe has bellows segment.
Preferably, in technique scheme, positive pressure pressure air induction hose comprises: the first positive pressure pressure air induction hose and the second positive pressure pressure air induction hose, described EGR valve thermostat valve is installed on engine water outlet house steward, the entrance point of this EGR valve thermostat valve is linked on engine air inlet tube by the first positive pressure pressure air induction hose and positive pressure pressure air input joint, and the outlet end of this EGR valve thermostat valve is connected with EGR valve by the second positive pressure pressure air induction hose.
Preferably, in technique scheme, EGR valve is fixing on the engine by fixed support.
Compared with prior art, the present invention has following beneficial effect: this gas recirculation system adopts the mode of air cooling exhaust gas temperature, decrease and for the cooler for recycled exhaust gas of cooled exhaust air and arranging EGR cooling water channel overall engine to be arranged and the impact of performance, what whole egr system was become is simpler, it is more convenient to install, and reduces the rate of fault of whole system simultaneously.And the unlatching of EGR valve adopts the unfolding mode of air inlet malleation and engine water temperature double action, in electric-controlled co-rail diesel engine, ensure while can effectively opening to meet national Abgasgesetz.
Accompanying drawing explanation
Fig. 1 is the first structural representation of gas recirculation system of the present invention.
Fig. 2 is the second structural representation of gas recirculation system of the present invention.
Fig. 3 is the 3rd structural representation of gas recirculation system of the present invention.
Fig. 4 is the 4th structural representation of gas recirculation system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of embodiment.
Clearly represent unless otherwise other, otherwise in whole specification and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or constituent element, and do not get rid of other element or other constituent element.
As shown in Figures 1 to 4, comprise according to the concrete structure of the gas recirculation system of the specific embodiment of the invention: EGR valve air inlet tube 4, EGR valve steam outlet pipe 9, EGR valve outgoing gas connection tube 1, EGR valve 7, EGR valve thermostat valve 8 and EGR valve fixed support 5.Wherein, EGR valve air inlet tube 4 is fixed on engine exhaust pipe EGR waste gas outlet; EGR valve outgoing gas connection tube 1 one end is fixed on engine air inlet tube EGR waste gas inlet, and the other end is connected with EGR valve steam outlet pipe 9; EGR valve fixed support 5 is fixed on motor, supports EGR valve by fixed support 5, ensures the strength of reliability of EGR; EGR valve 7 is fixed on EGR valve air inlet tube 4 with on EGR valve steam outlet pipe 9, and be linked on engine air inlet tube by positive pressure pressure air induction hose, EGR valve thermostat valve 8 is arranged on this positive pressure pressure air induction hose and engine water outlet house steward, EGR valve 7 and EGR valve thermostat valve 8 are in closed condition under normal circumstances, the unlatching of EGR valve is made to adopt the unfolding mode of air inlet malleation and engine water temperature double action, in electric-controlled co-rail diesel engine, ensure while can effectively opening to meet national Abgasgesetz.
Specifically, the outer end of EGR valve air inlet tube 4 is fixed on engine exhaust pipe EGR waste gas outlet by two support bracket bolts through screw 21,22, and the waste gas of motor enters gas recirculation system through this EGR valve air inlet tube 4.
EGR valve outgoing gas connection tube 1 one end is fixed on engine air inlet tube EGR waste gas inlet through screw 25,26 by two support bracket bolts, and the other end is connected with the outer end of EGR valve steam outlet pipe 9.EGR valve steam outlet pipe 9 is fixed by EGR valve steam outlet pipe Duct fixing clamp 12.EGR valve steam outlet pipe 9 is Stainless Steel Tube, tube wall is thinner, the process making waste gas enter into engine air inlet tube by EGR valve steam outlet pipe 9 fully can be dispelled the heat by engine blower, thus eliminate and for the cooler for recycled exhaust gas of cooled exhaust air and arranging EGR cooling water channel overall engine to be arranged and the impact of performance, what whole egr system was become is simpler, it is more convenient to install, and reduces the rate of fault of whole system simultaneously.
EGR valve steam outlet pipe 9 has EGR valve steam outlet pipe bellows segment 31, and its effect is when engine operation is vibrated, and the vibration that buffering is fallen for EGR pipe road injures, and eliminates EGR pipe road simultaneously and installs the stress produced, and simultaneously because its deformability, is convenient to install.
EGR valve 7 is separately fixed at the inner of EGR valve air inlet tube 4 and the inner of EGR valve steam outlet pipe 9 by four bolts, and be linked on engine air inlet tube by positive pressure pressure air induction hose, EGR valve thermostat valve 8 is arranged on this positive pressure pressure air induction hose and engine water outlet house steward, EGR valve 7 and EGR valve thermostat valve 8 are in closed condition under normal circumstances, the unlatching of EGR valve is made to adopt the unfolding mode of air inlet malleation and engine water temperature double action, in electric-controlled co-rail diesel engine, ensure while can effectively opening to meet national Abgasgesetz.EGR valve is arranged in the middle part of whole EGR pipe road system, be cast member from outlet pipe to EGR valve end, heatproof is high, pipeline intensity is good, waste gas temperature after the cooling of this section of pipeline declines, effectively can extend the working life of EGR valve, simultaneously when EGR valve is in closed condition, effectively can block waste gas, reduce high-temp waste gas to the impact of EGR valve second half section pipeline, also can improve the reliability of second half section corrugated stainless steel tubing.EGR valve is arranged in while neutral position not only increases whole scheme for exhaust gas circulation system reliability and can also supports EGR valve in a word, and in whole engine running vibration processes, protection EGR valve can normally work, and reduces intensity class fault and occurs.
Preferably, positive pressure pressure air induction hose comprises: the first positive pressure pressure air induction hose 3 and the second positive pressure pressure air induction hose 6, wherein, EGR valve thermostat valve 8 is installed on engine water outlet house steward, the entrance point of this EGR valve thermostat valve 8 is linked on engine air inlet tube by the first positive pressure pressure air induction hose 3 and positive pressure pressure air input joint 2, outlet end is connected with EGR valve 7 by the second positive pressure pressure air induction hose 6, EGR valve 7 and EGR valve thermostat valve 8 are in closed condition under normal circumstances, when engine charge pressure and water temperature rise, EGR valve thermostat valve 8 becomes opening state by Water Temperature, motor positive pressure pressure is by positive pressure pressure air input joint 2, first positive pressure pressure air induction hose 3, EGR valve thermostat valve 8, second positive pressure pressure air induction hose 6 enters into EGR valve 7, promote its inner valve block, EGR valve 7 is made to be in open mode, waste gas is by EGR valve air inlet tube 4, EGR valve 7, EGR valve steam outlet pipe 9, EGR valve outgoing gas connection tube 1 enters into engine air inlet tube, thus reach the process of waste gas circulation.EGR valve in this scheme for exhaust gas circulation system is by just opening under suction pressure and engine water temperature double action, namely when engine charge pressure reaches certain value, and engine water temperature is when also rising to certain value, just can affect and act on EGR valve and open, if have one not meet in both, then EGR valve is in normally off.
EGR valve fixed support 5 is fixed on motor by two support bracket bolts through screw 23,24, supports EGR valve by fixed support 5, ensures the strength of reliability of EGR; Wherein screw 23,24 is long lumbar hole design, can increase the adjustment nargin that support installing is fixing.
To sum up, this gas recirculation system adopts the mode of air cooling exhaust gas temperature, decrease and for the cooler for recycled exhaust gas of cooled exhaust air and arranging EGR cooling water channel overall engine to be arranged and the impact of performance, what whole egr system was become is simpler, it is more convenient to install, and reduces the rate of fault of whole system simultaneously.And the unlatching of EGR valve adopts the unfolding mode of air inlet malleation and engine water temperature double action, in electric-controlled co-rail diesel engine, ensure while can effectively opening to meet national Abgasgesetz.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (6)
1. a gas recirculation system, is characterized in that, comprising:
EGR valve air inlet tube, its outer end is fixed on engine exhaust pipe EGR waste gas outlet;
EGR valve steam outlet pipe, its outer end is connected with engine air inlet tube EGR waste gas inlet by EGR valve outgoing gas connection tube;
EGR valve, it is fixed on the inner of described EGR valve air inlet tube and EGR valve steam outlet pipe, and by positive pressure pressure air induction hose access engine air inlet tube; And
EGR valve thermostat valve, it is arranged on this positive pressure pressure air induction hose and engine water outlet house steward, described EGR valve and EGR valve thermostat valve are in closed condition under normal circumstances, make the unlatching of EGR valve adopt the unfolding mode of air inlet malleation and engine water temperature double action.
2. gas recirculation system according to claim 1, is characterized in that, described EGR valve steam outlet pipe is fixed by EGR valve steam outlet pipe Duct fixing clamp.
3. gas recirculation system according to claim 1, is characterized in that, described EGR valve steam outlet pipe adopts thin-wall stainless steel.
4. gas recirculation system according to claim 1, is characterized in that, described EGR valve steam outlet pipe has bellows segment.
5. gas recirculation system according to claim 1, it is characterized in that, described positive pressure pressure air induction hose comprises: the first positive pressure pressure air induction hose and the second positive pressure pressure air induction hose, described EGR valve thermostat valve is installed on engine water outlet house steward, the entrance point of this EGR valve thermostat valve is linked on engine air inlet tube by the first positive pressure pressure air induction hose and positive pressure pressure air input joint, and the outlet end of this EGR valve thermostat valve is connected with EGR valve by the second positive pressure pressure air induction hose.
6. gas recirculation system according to claim 1, is characterized in that, described EGR valve is fixing on the engine by fixed support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610114294.XA CN105569885A (en) | 2016-03-01 | 2016-03-01 | Exhaust gas recirculation (EGR) system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610114294.XA CN105569885A (en) | 2016-03-01 | 2016-03-01 | Exhaust gas recirculation (EGR) system |
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| CN105569885A true CN105569885A (en) | 2016-05-11 |
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| CN201610114294.XA Pending CN105569885A (en) | 2016-03-01 | 2016-03-01 | Exhaust gas recirculation (EGR) system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697199A (en) * | 2016-04-11 | 2016-06-22 | 广西玉柴机器股份有限公司 | Temperature control EGR system of engine |
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| CN104653349A (en) * | 2013-11-17 | 2015-05-27 | 胡志龙 | Pneumatic device with air inflow as air source |
| CN105134421A (en) * | 2015-10-15 | 2015-12-09 | 广西玉柴机器股份有限公司 | EGR (exhaust gas recirculation) system of engine |
| CN205349566U (en) * | 2016-03-01 | 2016-06-29 | 广西玉柴机器股份有限公司 | Exhaust gas recycling system |
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2016
- 2016-03-01 CN CN201610114294.XA patent/CN105569885A/en active Pending
Patent Citations (6)
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| CN102022172A (en) * | 2009-09-09 | 2011-04-20 | 通用汽车环球科技运作公司 | Cooling system for an internal combustion engine |
| WO2012096958A1 (en) * | 2011-01-10 | 2012-07-19 | Cummins Intellectual Property, Inc. | Rankine cycle waste heat recovery system |
| CN104608594A (en) * | 2013-11-05 | 2015-05-13 | 福特环球技术公司 | Exhaust throttling for cabin heating |
| CN104653349A (en) * | 2013-11-17 | 2015-05-27 | 胡志龙 | Pneumatic device with air inflow as air source |
| CN105134421A (en) * | 2015-10-15 | 2015-12-09 | 广西玉柴机器股份有限公司 | EGR (exhaust gas recirculation) system of engine |
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| CN105697199A (en) * | 2016-04-11 | 2016-06-22 | 广西玉柴机器股份有限公司 | Temperature control EGR system of engine |
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Application publication date: 20160511 |