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CN113530724A - Engine EGR system and gas engine - Google Patents

Engine EGR system and gas engine Download PDF

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Publication number
CN113530724A
CN113530724A CN202010303654.7A CN202010303654A CN113530724A CN 113530724 A CN113530724 A CN 113530724A CN 202010303654 A CN202010303654 A CN 202010303654A CN 113530724 A CN113530724 A CN 113530724A
Authority
CN
China
Prior art keywords
engine
gas
egr system
communicated
control device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010303654.7A
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Chinese (zh)
Inventor
郑永胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Foton Cummins Engine Co Ltd
Original Assignee
Beijing Foton Cummins Engine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Foton Cummins Engine Co Ltd filed Critical Beijing Foton Cummins Engine Co Ltd
Priority to CN202010303654.7A priority Critical patent/CN113530724A/en
Publication of CN113530724A publication Critical patent/CN113530724A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0077—Control of the EGR valve or actuator, e.g. duty cycle, closed loop control of position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/04—Gas-air mixing apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the exhaust system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
    • F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/51—EGR valves combined with other devices, e.g. with intake valves or compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/74—Protection from damage, e.g. shielding means
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels
    • 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
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The invention provides an engine EGR system and a gas engine, wherein the engine EGR system comprises an exhaust manifold, a cooler, a measurement and control device and a bypass pipeline, wherein the air inlet end of the cooler is communicated with the exhaust manifold and used for cooling waste gas, the measurement and control device is communicated with the air outlet end of the cooler, one end of the bypass pipeline is communicated with the exhaust manifold, the other end of the bypass pipeline is communicated with the air inlet end of the measurement and control device, and the bypass pipeline is used for directly conveying the waste gas to the measurement and control device. The invention can accelerate the melting of ice beads and reduce the cold start idling time of the gas engine.

Description

Engine EGR system and gas engine
Technical Field
The invention relates to the technical field of engines, in particular to an engine EGR system and a gas engine.
Background
As emission standards have upgraded, the use of EGR (exhaust gas recirculation) systems has become an emission solution route for gas engines.
However, the combustion exhaust gas of a gas engine contains a large part of water vapor (equivalent combustion theoretical volume ratio of about 18.2%), and in the case of low temperature in winter, the water vapor in an EGR system during sleeping is inevitably frozen, and the water vapor may be sublimated into ice on the surface of a flow passage or may be condensed into water and then may be frozen into ice at the condensed water accumulation part.
The sensor of the measurement and control device can cause wrong detection and diagnosis report due to the existence of ice balls, or the starting is difficult due to the icing and blocking (non-zero point) of the EGR valve, and if the EGR valve is blocked at the zero point, the problems that the emission does not reach the standard, the power of a torque point is insufficient, and even the cold starting is difficult are caused.
Therefore, how to effectively deal with the problem of icing in winter of the EGR system of the natural gas engine becomes an inevitable problem facing the development of the gas engine.
Aiming at the problems, the invention designs the engine EGR system and the gas engine which can accelerate the melting of ice balls and reduce the cold start idle time of the gas engine.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an engine EGR system and a gas engine, which can accelerate the melting of ice beads and reduce the cold start idling time of the gas engine.
In a first aspect, the invention provides an engine EGR system, which includes an exhaust manifold, a cooler, a measurement and control device, and a bypass pipeline, wherein an air inlet end of the cooler is communicated with the exhaust manifold for cooling exhaust gas, the measurement and control device is communicated with an air outlet end of the cooler, one end of the bypass pipeline is communicated with the exhaust manifold, and the other end of the bypass pipeline is communicated with an air inlet end of the measurement and control device for directly conveying the exhaust gas to the measurement and control device.
In one embodiment, the system further comprises a bypass control valve which is arranged on the bypass pipeline and used for controlling the on-off of the bypass pipeline.
The beneficial effects of adopting the above embodiment are: the bypass control valve controls the on-off of the bypass pipeline, and further realizes the control of the waste gas amount passing through the bypass pipeline.
In one embodiment, the control device is electrically connected with the bypass control valve and used for controlling the bypass control valve.
The beneficial effects of adopting the above embodiment are: the opening and closing of the bypass control valve is controlled by the control device.
In one embodiment, the control device employs an ECU or ECM.
The beneficial effects of adopting the above embodiment are: automatic control of the bypass control valve is achieved by the ECU or ECM.
In one embodiment, the measurement and control device comprises a measuring device and an EGR valve, the measuring device is communicated with the air outlet end of the cooler and used for measuring the temperature and the flow of the exhaust gas, and the EGR valve is communicated with the air outlet end of the measuring device and used for controlling the amount of the exhaust gas passing through an engine EGR system.
The beneficial effects of adopting the above embodiment are: the temperature and flow of exhaust gas are measured by a measuring device and the amount of exhaust gas passing through the engine EGR system is controlled by an EGR valve.
In one embodiment, the measuring device comprises a venturi tube, a differential pressure sensor and a temperature sensor, the venturi tube is communicated with the air outlet end of the cooler, the differential pressure sensor is arranged on the venturi tube and used for measuring the flow of the waste gas passing through the venturi tube, and the temperature sensor is arranged on the venturi tube and used for measuring the temperature of the waste gas passing through the venturi tube.
The beneficial effects of adopting the above embodiment are: the flow and the temperature of the waste gas are accurately measured through the Venturi tube, the differential pressure sensor and the temperature sensor.
In a second aspect, the invention also provides a gas engine comprising an engine EGR system as described above and an engine cylinder communicating with the exhaust manifold.
In one embodiment, the engine further comprises an intake mixing chamber, the outlet end of which is in communication with the engine cylinder for providing gaseous fuel to the engine cylinder.
The beneficial effects of adopting the above embodiment are: for continuously supplying gaseous fuel to the engine cylinders.
In one embodiment, the gas outlet end of the measurement and control device is communicated with the gas inlet mixing chamber and is used for introducing exhaust gas passing through an engine EGR system into the gas inlet mixing chamber;
the intake mixing chamber is used for collecting air, gas fuel and exhaust gas passing through an engine EGR system to form mixed gas, and the formed mixed gas is introduced into the engine cylinder.
The beneficial effects of adopting the above embodiment are: the waste gas is recycled, so that the nitrogen oxides in the exhaust gas are reduced, the combustion efficiency of gas fuel is improved, and the exhaust temperature is reduced.
In one embodiment, a supercharger is also included in communication with the exhaust manifold.
The beneficial effects of adopting the above embodiment are: the exhaust gas inertia impulse is used for driving the supercharger to act, so that air is compressed, and the air inflow of the air is increased.
Compared with the prior art, the invention has the advantages that:
(1) through the setting of bypass line, directly carry high temperature waste gas to measurement and control device department, the melting of the ice ball of measurement and control device department is with higher speed.
(2) The cold start idle time of the gas engine is reduced.
The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 shows a schematic of a gas engine exhaust gas recirculation control;
in the drawings, like parts are provided with like reference numerals. The drawings are not to scale.
10-a gas engine; 11-an exhaust manifold; 13-a cooler; 15-a measurement and control device; 17-a bypass line; 19-a bypass control valve; 21-an engine cylinder; 23-an intake air mixing chamber; 25-a supercharger.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
As shown in fig. 1, an engine EGR system includes an exhaust manifold 11, a cooler 13, a measurement and control device 15 and a bypass pipeline 17, an air inlet end of the cooler 13 is communicated with the exhaust manifold 11 for cooling exhaust gas, the measurement and control device 15 is communicated with an air outlet end of the cooler 13, one end of the bypass pipeline 17 is communicated with the exhaust manifold 11, and the other end of the bypass pipeline is communicated with an air inlet end of the measurement and control device 15 for directly conveying the exhaust gas to the measurement and control device 15.
The engine EGR system further comprises a bypass control valve 19 and a control device, the bypass control valve 19 is arranged on the bypass pipeline 17 and used for controlling the on-off of the bypass pipeline 17, and the control device is electrically connected with the bypass control valve 19 and used for controlling the opening and closing of the bypass control valve 19.
Specifically, in this embodiment, the Control device may adopt an ECU (Electronic Control Unit) or an ECM (Engine Control Module) to automatically Control the opening and closing of the bypass Control valve 19.
In this embodiment, the control device controls the operation of the bypass control valve 19 so that the bypass line 17 can continuously ventilate for 3 to 5 seconds.
In one embodiment, the control logic of the control device is: the ambient temperature is lower than-5 ℃, the bypass control valve 19 is controlled to be opened 10 seconds after the ignition of the engine cylinder 21, and the bypass control valve 19 is controlled to be closed 15 seconds after the ignition.
In one embodiment, the control logic of the control device can be any temperature below 0 ℃ and any time within 0-60 seconds after the ignition of the engine cylinder 21.
The measurement and control device 15 includes a measurement device and an EGR valve, the measurement device is communicated with the gas outlet end of the cooler 13 for measuring the temperature and flow rate of the exhaust gas, and the EGR valve is communicated with the gas outlet end of the measurement device for controlling the amount of the exhaust gas passing through the EGR system of the engine.
Specifically, in this embodiment, measuring device includes venturi, differential pressure sensor and temperature sensor, and venturi's the inlet end and the end intercommunication of giving vent to anger of cooler 13, and differential pressure sensor and temperature sensor all set up on venturi, and differential pressure sensor is used for measuring the flow through venturi's waste gas, and temperature sensor is used for measuring the temperature through venturi's waste gas. And the air inlet end of the EGR valve is communicated with the air outlet end of the Venturi tube and used for feeding back and controlling the amount of exhaust gas passing through the Venturi tube.
In this embodiment, the exhaust manifold 11 can concentrate exhaust gas (at a temperature of about 400 to 500 ℃) discharged from each cylinder of the engine. The exhaust gas in the exhaust manifold 11 is cooled by a cooler 13 and then introduced into a venturi tube. One end of the bypass pipeline 17 is communicated with the exhaust manifold 11, and the other end of the bypass pipeline 17 is communicated with the air inlet end of the venturi tube (or the upstream of the venturi tube), so that the bypass pipeline 17 can stride over the cooler 13 to directly convey the waste gas in the exhaust manifold 11 to the air inlet end of the venturi tube (or the upstream of the venturi tube), the waste gas cooled by the cooler 13 and the waste gas conveyed by the bypass pipeline 17 can be converged at the venturi tube (or the upstream of the venturi tube) (the gas temperature at the convergence position is about 100-200 ℃), and then the melting of ice crystals/ice beads generated when the measuring and controlling device 15 is in a sleeping car is accelerated.
As shown in fig. 1, the present invention also discloses a gas engine 10 comprising the above-described engine EGR system, engine cylinders 21 and intake air mixing chambers 23. The engine cylinder 21 communicates with the intake manifold 11 for discharging combustion exhaust gas in the engine cylinder 21 into the intake manifold 11. An outlet end of the intake mixing chamber 23 communicates with the engine cylinder 21 for supplying gaseous fuel to the engine cylinder 21. The air outlet end of the measurement and control device 15 is communicated with the air inlet mixing chamber 23 and is used for introducing exhaust gas passing through an engine EGR system into the air inlet mixing chamber 23.
Specifically, in the present embodiment, the intake air mixing chamber 23 collects air, gaseous fuel and exhaust gas passing through the EGR system of the engine to form a mixed gas, and the mixed gas enters the engine cylinder 21 from the air outlet end of the intake air mixing chamber 23 to supply the gaseous fuel to the engine cylinder 21.
The air outlet end of the EGR valve is communicated with the air inlet mixing chamber 23, combustion waste gas of the engine cylinder 21 enters the air inlet mixing chamber 23 from the air outlet end of the EGR valve after passing through an engine EGR system, and the cyclic utilization of the combustion waste gas reduces nitrogen oxides in the exhaust gas, improves the combustion efficiency of gas fuel and reduces the exhaust temperature.
The gas engine 10 further includes a supercharger 25, and the supercharger 25 is communicated with the exhaust manifold 11.
Specifically, in the present embodiment, the supercharger 25 is a turbocharger, the turbocharger is communicated with the intake air mixing chamber 23, and air enters the intake air mixing chamber 23 after passing through the turbocharger. The turbocharger drives the turbocharger by using the inertia impulse of the exhaust gas in the exhaust manifold 11, and further compresses air to increase the air intake amount.
In the prior art, when a gas engine is in cold start, the idling time required for melting ice crystals/ice balls in an engine EGR system is about 20-30 minutes (test data of a 12L displacement gas engine), while the idling time of the gas engine 10 is about 15 seconds, so that the melting of the ice crystals/ice balls is greatly accelerated, and the idling time of the cold start of the gas engine 10 is reduced.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims (10)

1. An engine EGR system, comprising:
an exhaust manifold;
the air inlet end of the cooler is communicated with the exhaust manifold and is used for cooling the exhaust gas;
the measurement and control device is communicated with the air outlet end of the cooler; and
and one end of the bypass pipeline is communicated with the exhaust manifold, and the other end of the bypass pipeline is communicated with the air inlet end of the measurement and control device, and is used for directly conveying the waste gas to the measurement and control device.
2. The engine EGR system of claim 1 further comprising a bypass control valve disposed on said bypass line for controlling the opening and closing of said bypass line.
3. The engine EGR system of claim 2 further comprising control means electrically connected to said bypass control valve for effecting control of said bypass control valve.
4. The engine EGR system of claim 3 wherein said control means employs an ECU or ECM.
5. The engine EGR system of any of claims 1-4, wherein the measurement and control device comprises:
the measuring device is communicated with the air outlet end of the cooler and is used for measuring the temperature and the flow of the waste gas; and
and the EGR valve is communicated with the air outlet end of the measuring device and is used for controlling the amount of the exhaust gas passing through the EGR system of the engine.
6. The engine EGR system of claim 5, wherein said measuring means comprises:
a venturi tube in communication with an outlet end of the cooler;
a differential pressure sensor disposed on the venturi for measuring a flow rate of the offgas passing through the venturi; and
a temperature sensor disposed on the venturi for measuring a temperature of the exhaust gas passing through the venturi.
7. A gas engine comprising an engine EGR system according to any of claims 1-6 and an engine cylinder, said engine cylinder being in communication with said exhaust manifold.
8. The gas engine of claim 7 further comprising an intake mixing chamber having an outlet end in communication with the engine cylinder for providing gaseous fuel to the engine cylinder.
9. The gas engine of claim 8, wherein the gas outlet end of the measurement and control device is communicated with the air inlet mixing chamber and is used for introducing exhaust gas passing through an engine EGR system into the air inlet mixing chamber;
the intake mixing chamber is used for collecting air, gas fuel and exhaust gas passing through an engine EGR system to form mixed gas, and the formed mixed gas is introduced into the engine cylinder.
10. A gas engine as claimed in any one of claims 7 to 9, further comprising a supercharger in communication with the exhaust manifold.
CN202010303654.7A 2020-04-15 2020-04-15 Engine EGR system and gas engine Pending CN113530724A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010303654.7A CN113530724A (en) 2020-04-15 2020-04-15 Engine EGR system and gas engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010303654.7A CN113530724A (en) 2020-04-15 2020-04-15 Engine EGR system and gas engine

Publications (1)

Publication Number Publication Date
CN113530724A true CN113530724A (en) 2021-10-22

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CN202010303654.7A Pending CN113530724A (en) 2020-04-15 2020-04-15 Engine EGR system and gas engine

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090320467A1 (en) * 2006-11-27 2009-12-31 Zoltan Kardos Arrangement for recirculation of exhaust gases in a supercharged combustion engine
CN203403990U (en) * 2013-08-30 2014-01-22 广西玉柴机器股份有限公司 Engine egr system
CN104302904A (en) * 2012-05-14 2015-01-21 卡特彼勒公司 EGR with temperature controlled venturi flow meter
CN110748443A (en) * 2019-11-26 2020-02-04 广西玉柴机器股份有限公司 Exhaust gas recirculation system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090320467A1 (en) * 2006-11-27 2009-12-31 Zoltan Kardos Arrangement for recirculation of exhaust gases in a supercharged combustion engine
CN104302904A (en) * 2012-05-14 2015-01-21 卡特彼勒公司 EGR with temperature controlled venturi flow meter
CN203403990U (en) * 2013-08-30 2014-01-22 广西玉柴机器股份有限公司 Engine egr system
CN110748443A (en) * 2019-11-26 2020-02-04 广西玉柴机器股份有限公司 Exhaust gas recirculation system

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Application publication date: 20211022

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