CN102913345B - A kind of EGR gas temperature control apparatus, method and motor, engineering machinery - Google Patents
A kind of EGR gas temperature control apparatus, method and motor, engineering machinery Download PDFInfo
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- CN102913345B CN102913345B CN201210370534.4A CN201210370534A CN102913345B CN 102913345 B CN102913345 B CN 102913345B CN 201210370534 A CN201210370534 A CN 201210370534A CN 102913345 B CN102913345 B CN 102913345B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention discloses a kind of EGR gas temperature control apparatus, comprising: cooler for recycled exhaust gas, for cooling the EGR gas introduced from engine exhaust pipe; Bypass tube, its entrance is communicated with the cooling liquid entrance of cooler for recycled exhaust gas; Flow control valve, is arranged on bypass tube, for regulating the flow of cooling liquid in bypass tube.The present invention can by the temperature of the aperture control EGR gas of adjust flux modulating valve, and control structure is simple, easy and simple to handle, avoids the too high or too low for temperature of EGR gas, damages in EGR valve or cooler for recycled exhaust gas and EGR valve body and deposits gum deposit thing and carbon distribution.The invention also discloses a kind of motor, engineering machinery and EGR gas temperature control method.
Description
Technical field
The present invention relates to engineering machinery field, particularly a kind of EGR gas temperature control apparatus, controlling method and motor, engineering machinery.
Background technique
Gas recirculation system (ExhaustGasRecirculation) is called for short EGR, is the technology that importing intake manifold after a part for the gas of discharging after burning cooling makes it burn once again by motor.Cooling system for recycled exhaust gas is one of critical component of egr system, and the temperature of motor exhaust is generally 450 degree of-700 degree, needs the efficiency that is cooled to just to give full play to motor in certain temperature range and decreasing pollution gas purging to greatest extent.
The gas temperature of enmgine exhaust and the flow of EGR gas change along with the change of operating mode, and current cooler for recycled exhaust gas cannot, according to the change adjustment cooling capacity of operating mode, therefore may cause EGR gas temperature too high or too low.If gas temperature is too high, the electric part of EGR valve can be damaged, also can improve the intake temperature of motor, volumetric efficiency is declined; If gas temperature is too low, can deposit gum deposit thing and carbon distribution in cooler for recycled exhaust gas and EGR valve body, EGR valve assembles too much gum deposit thing can produce catching phenomenon, and make the inefficacy of whole egr system, discharge exceeds standard.
Summary of the invention
In view of this, the present invention proposes a kind of EGR gas temperature control apparatus, uncontrollable to solve EGR gas temperature, and causes problems such as damaging EGR valve of engine, discharge exceeds standard.
On the one hand, the invention provides a kind of EGR gas temperature control apparatus, comprising: cooler for recycled exhaust gas, for cooling the EGR gas introduced from engine exhaust pipe; Bypass tube, its entrance is communicated with the cooling liquid entrance of cooler for recycled exhaust gas; Flow control valve, is arranged on bypass tube, for regulating the flow of cooling liquid in bypass tube.
Further, the gas exit line of described cooler for recycled exhaust gas is provided with temperature transducer.
Further, described flow control valve is flow solenoid valve or motor-driven valve or electronic thermostat.
Further, according to the maximum EGR rate of motor and most high exhaust temperature, the cooler for recycled exhaust gas of corresponding cooling capacity is mated.
Further, the outlet of described bypass tube is communicated with the cooling liquid outlet of cooler for recycled exhaust gas.
This programme can by the temperature of the aperture control EGR gas of adjust flux modulating valve, and control structure is simple, easy and simple to handle.The temperature of control EGR gas, can avoid gas temperature too high, and the intake temperature of the damage electric part of EGR valve and motor is too high, and volumetric efficiency is declined; Gas temperature can also be avoided too low, in cooler for recycled exhaust gas and EGR valve body, deposit gum deposit thing and carbon distribution, produce catching phenomenon, make the inefficacy of whole egr system, discharge exceeds standard.
Present invention also offers a kind of motor being provided with above-mentioned EGR gas temperature control apparatus.
Present invention also offers a kind of engineering machinery being provided with above-mentioned motor.
Present invention also offers a kind of EGR gas temperature control method, comprise the steps:
The EGR gas true temperature of the gas outlet of S1, detection cooler for recycled exhaust gas;
S2, true temperature and target temperature to be contrasted;
S3, to regulate according to the aperture of comparing result to flow control valve, thus regulate the coolant rate in bypass tube and the coolant rate in cooler for recycled exhaust gas.
Further, step S1 also comprises: according to the maximum EGR rate of motor and most high exhaust temperature, mate the cooler for recycled exhaust gas of corresponding cooling capacity.
Further, step S1 also comprises: according to the EGR rate under the actual conditions of motor and delivery temperature, the initial opening of setting flow control valve.
This controlling method is simple, is easy to operation, can controls according to actual conditions to EGR gas temperature.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
The structural representation of the EGR temperature control apparatus that Fig. 1 provides for the embodiment of the present invention.
Description of reference numerals
1, cooler for recycled exhaust gas 2, bypass tube 3, flow control valve 4, temperature transducer
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Basic thought of the present invention is: solve the uncontrollable problem of EGR gas temperature, the present invention proposes a kind of EGR gas temperature control apparatus, this device adds a bypass tube on the passage of cooler for recycled exhaust gas cooling liquid, by the flow regulating the uninterrupted of cooling liquid in bypass tube to regulate cooling liquid in cooler for recycled exhaust gas, thus the temperature of control EGR gas is in the scope required.
Below in conjunction with Fig. 1, the preferred embodiments of the present invention are described in further detail: EGR gas temperature control apparatus comprises: cooler for recycled exhaust gas 1, for cooling the EGR gas introduced from engine exhaust pipe; Bypass tube 2, its entrance is communicated with the cooling liquid entrance of cooler for recycled exhaust gas 1; Flow control valve 3, is arranged on bypass tube 2, for regulating the flow of cooling liquid in bypass tube 2.
In such scheme, when need reduce EGR gas temperature, then turn the aperture of flow control valve 3 down, thus reduce the flow of cooling liquid in bypass tube 2.Because the coolant rate sum in bypass tube 2 and cooler for recycled exhaust gas 1 is certain, reduce the flow of cooling liquid in bypass tube 2, then increase the coolant rate in cooler for recycled exhaust gas 1, the cooling capacity of cooler for recycled exhaust gas 1 is strengthened simultaneously, and the temperature of EGR gas reduces.
When need raise EGR gas temperature, then the aperture of augmented flow modulating valve 3, thus increase the flow of cooling liquid in bypass tube 2, the coolant rate reduced in cooler for recycled exhaust gas 1, the cooling capacity of cooler for recycled exhaust gas 1 declines, and the temperature of EGR gas raises.
This programme can by the temperature of the aperture control EGR gas of adjust flux modulating valve 3, and control structure is simple, easy and simple to handle.
Further, the gas exit line of cooler for recycled exhaust gas 1 is provided with temperature transducer 4.The true temperature of EGR gas can be detected so in real time, thus true temperature and target temperature can be contrasted, regulate according to the aperture of comparing result to modulating valve 3, thus the true temperature of EGR gas can be regulated to target temperature value, EGR gas temperature is controlled more accurate.Above-mentioned target temperature is engine EGR optimum temperature, and this target temperature can obtain by experiment, and sets in the controls, and this control system can be a part for engine control system also can be the control system that egr system is arranged separately.
Further, flow control valve 3 is flow solenoid valve or motor-driven valve or electronic thermostat.Flow solenoid valve, motor-driven valve or electronic thermostat can be controlled by automatically controlled signal, the aperture of the adjust flux modulating valve 3 that can transmit control signal by control system like this, thus realize the automatic control of EGR gas temperature.Automatic control process is as follows: first detect EGR gas true temperature by temperature transducer 4, EGR gas true temperature and target temperature contrast by control system, send a control signal to flow control valve 3 according to comparing result again to regulate its aperture, thus regulate the true temperature of EGR gas to target temperature value.
Further, EGR gas temperature control apparatus, according to the maximum EGR rate of motor and most high exhaust temperature, mates the cooler for recycled exhaust gas 1 of corresponding cooling capacity.Above-mentioned EGR rate is the ratio of the gaseous mass of EGR and the mixed gas quality of engine combustion.EGR rate is higher, and the EGR gas through cooler for recycled exhaust gas 1 is more, and the cooling capacity of the cooler for recycled exhaust gas 1 of needs is higher.Engine exhaust temperature i.e. EGR gas temperature before cooling, its temperature is higher, and the cooling capacity of the cooler for recycled exhaust gas 1 of needs is higher.Regulate the flow of bypass tube 2 can turn down cooler for recycled exhaust gas 1 cooling capacity, therefore mate the cooler for recycled exhaust gas 1 of corresponding cooling capacity according to the maximum EGR rate of motor and most high exhaust temperature, the thermoregulator requirement of the EGR gas under any operating mode can be met.
Further, the outlet of described bypass tube 2 is communicated with the cooling liquid outlet of cooler for recycled exhaust gas 1.Facilitate layout like this, structure is more compact.
Present invention also offers the motor comprising above-mentioned EGR gas temperature control apparatus, because this EGR gas temperature control apparatus has above-mentioned technique effect, therefore, the motor comprising above-mentioned EGR gas temperature control apparatus also should possess corresponding technique effect, its specific implementation process is similar to the above embodiments, does not hereby repeat.
Present invention also offers the engineering machinery comprising above-mentioned motor, because this motor has above-mentioned technique effect, therefore, the engineering machinery comprising above-mentioned motor also should possess corresponding technique effect, its specific implementation process is similar to the above embodiments, does not hereby repeat.
Present invention also offers a kind of EGR gas temperature control method, comprise the steps:
The EGR gas true temperature of the gas outlet of S1, detection cooler for recycled exhaust gas 1;
S2, true temperature and target temperature to be contrasted;
S3, to regulate according to the aperture of comparing result to flow control valve 3, thus regulate the coolant rate in bypass tube 2 and the coolant rate in cooler for recycled exhaust gas 1.
Two temperature manually contrast, the more manual aperture to flow control valve 3 regulates by the step S2 in said method, S3; Also can be set program in control system automatically to carry out.This controlling method is simple, is easy to operation, can controls according to actual conditions to EGR gas temperature.
Further, step S1 also comprises: according to the maximum EGR rate of motor and most high exhaust temperature, mate the cooler for recycled exhaust gas 1 of corresponding cooling capacity.Regulate the flow of bypass tube 2 can turn down cooler for recycled exhaust gas 1 cooling capacity, therefore mate the cooler for recycled exhaust gas 1 of corresponding cooling capacity according to the maximum EGR rate of motor and most high exhaust temperature, the thermoregulator requirement of the EGR gas under any operating mode can be met.
Further, step S1 also comprises: according to the EGR rate under the actual conditions of motor and delivery temperature, the initial opening of setting flow control valve 3.EGR gas temperature can be made like this to control in one preferably temperature range, and then carry out the aperture of adjust flux modulating valve 3 according to the true temperature of EGR and the comparing result of target temperature, realize the accurate control of EGR gas temperature.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. an EGR gas temperature control apparatus, is characterized in that, this device comprises:
Cooler for recycled exhaust gas (1), for cooling the EGR gas introduced from engine exhaust pipe;
Bypass tube (2), its entrance is communicated with the cooling liquid entrance of cooler for recycled exhaust gas (1);
Flow control valve (3), is arranged on bypass tube (2), for regulating the flow of cooling liquid in bypass tube (2);
The gas exit line of described cooler for recycled exhaust gas (1) is provided with temperature transducer (4), when need raise EGR gas temperature, the then aperture of augmented flow modulating valve (3), thus increase the flow of cooling liquid in bypass tube (2), the coolant rate reduced in cooler for recycled exhaust gas (1), the cooling capacity of cooler for recycled exhaust gas (1) declines, and the temperature of EGR gas raises;
Described flow control valve (3) is flow solenoid valve or motor-driven valve or electronic thermostat.
2. EGR gas temperature control apparatus according to claim 1, is characterized in that, according to the maximum EGR rate of motor and most high exhaust temperature, mates the cooler for recycled exhaust gas (1) of corresponding cooling capacity.
3., according to the arbitrary described EGR gas temperature control apparatus of claim 1-2, it is characterized in that, the outlet of described bypass tube (2) is communicated with the cooling liquid outlet of cooler for recycled exhaust gas (1).
4. a motor, is characterized in that, be provided with as arbitrary in claim 1-3 item as described in EGR gas temperature control apparatus.
5. an engineering machinery, is characterized in that, is provided with motor as claimed in claim 4.
6. an EGR gas temperature control method, is characterized in that, comprises the steps:
The EGR gas true temperature of the gas outlet of S1, detection cooler for recycled exhaust gas (1); According to the maximum EGR rate of motor and most high exhaust temperature, mate the cooler for recycled exhaust gas (1) of corresponding cooling capacity; According to the EGR rate under the actual conditions of motor and delivery temperature, the initial opening of setting flow control valve (3);
S2, true temperature and target temperature to be contrasted;
S3, to regulate according to the aperture of comparing result to flow control valve (3), thus regulate the coolant rate in bypass tube (2) and the coolant rate in cooler for recycled exhaust gas (1).
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| CN201210370534.4A CN102913345B (en) | 2012-09-27 | 2012-09-27 | A kind of EGR gas temperature control apparatus, method and motor, engineering machinery |
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| CN201210370534.4A CN102913345B (en) | 2012-09-27 | 2012-09-27 | A kind of EGR gas temperature control apparatus, method and motor, engineering machinery |
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| CN102913345B true CN102913345B (en) | 2016-01-20 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485937A (en) * | 2013-08-30 | 2014-01-01 | 广西玉柴机器股份有限公司 | Engine EGR (Exhaust Gas Recirculation) system |
| CN104196652B (en) * | 2014-08-13 | 2017-06-27 | 潍柴动力股份有限公司 | The control method and control device of a kind of egr system and its cold rear intake air temperature |
| CN104329177A (en) * | 2014-09-26 | 2015-02-04 | 奇瑞汽车股份有限公司 | Control device of EGR (Exhaust Gas Recirculation) temperature and control method of control device |
| CN104930257B (en) * | 2015-04-29 | 2018-12-14 | 潍柴动力股份有限公司 | A kind of control method and device of valve |
| CN106609713A (en) * | 2015-10-19 | 2017-05-03 | 北汽福田汽车股份有限公司 | A method and a device for reducing NOx in waste gas and an exhaust gas recirculation system |
| CN107620656A (en) * | 2016-07-15 | 2018-01-23 | 联合汽车电子有限公司 | Cooler for recycled exhaust gas |
| JP7081515B2 (en) * | 2019-01-31 | 2022-06-07 | トヨタ自動車株式会社 | Internal combustion engine control device |
| CN111173655A (en) * | 2020-01-19 | 2020-05-19 | 安徽华菱汽车有限公司 | Method and device for simulating failure of EGR (exhaust gas Recirculation) system of diesel engine |
| CN114087094B (en) * | 2021-11-10 | 2024-07-12 | 中国重汽集团济南动力有限公司 | Parallel EGR (exhaust gas recirculation) cooling system and cooling method |
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| CN102182585A (en) * | 2009-12-25 | 2011-09-14 | 株式会社堀场制作所 | Exhaust gas recirculation (EGR) ratio measuring device |
| CN102305151A (en) * | 2011-08-03 | 2012-01-04 | 天津大学 | System for efficiently recovering waste heat energy from internal combustion engine |
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| JP2001173519A (en) * | 1999-12-16 | 2001-06-26 | Toyota Motor Corp | Exhaust reflux device for internal combustion engine |
| JP2005273582A (en) * | 2004-03-25 | 2005-10-06 | Calsonic Kansei Corp | Exhaust heat recovery system |
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| CN102182585A (en) * | 2009-12-25 | 2011-09-14 | 株式会社堀场制作所 | Exhaust gas recirculation (EGR) ratio measuring device |
| CN102305151A (en) * | 2011-08-03 | 2012-01-04 | 天津大学 | System for efficiently recovering waste heat energy from internal combustion engine |
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Effective date of registration: 20160309 Address after: The Yangcheng Lake Road Development Zone in Kunshan City, Jiangsu province 214300 No. 9999 room 7 Patentee after: Kunshan 31 Power Co., Ltd. Address before: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Patentee before: Sanyi Heavy Industry Co., Ltd. |