CN111336001A - Engine supercharging system and vehicle thereof - Google Patents
Engine supercharging system and vehicle thereof Download PDFInfo
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- CN111336001A CN111336001A CN202010094627.3A CN202010094627A CN111336001A CN 111336001 A CN111336001 A CN 111336001A CN 202010094627 A CN202010094627 A CN 202010094627A CN 111336001 A CN111336001 A CN 111336001A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0493—Controlling the air charge temperature
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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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- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses an engine supercharging system and a vehicle thereof, and relates to the technical field of vehicles. The engine supercharging system comprises a cylinder, an air injection device, a turbocharger, an air inlet pipeline and an exhaust pipeline; the turbocharger comprises a compressor and a turbine; the air inlet end of the cylinder is connected with the air compressor through an air inlet pipeline, and the air outlet end of the cylinder is connected with the turbine through an air outlet pipeline; the gas injection device comprises a gas rail and a natural gas nozzle connected with the gas rail, natural gas is stored in the gas rail, the natural gas nozzle is positioned at the end of the gas compressor, the gas compressor is provided with a gas compressor impeller, and the natural gas nozzle is used for injecting natural gas to the gas compressor impeller. Compared with the prior art, the natural gas injection device has the advantages that the natural gas is injected to the impeller of the air compressor, the gas temperature at the rear end of the air compressor is reduced, so that the air inlet charge is improved, the efficiency of the turbocharger is improved, the high-efficiency energy-saving design of an engine is facilitated, and the original discharge amount of nitrogen oxides of the engine can be reduced.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an engine supercharging system and a vehicle thereof.
Background
In recent years, in order to deal with energy crisis and climate change, countries release more severe oil consumption emission regulations, and as a power source for vehicles, gasoline engines still exist for a long time, automobile manufacturers need to continuously improve the fuel economy of the whole vehicle, according to the technical roadmap of energy-saving and new energy automobiles released in 2016 of the country, the average oil consumption of new passenger vehicles reaches 5.0L/100Km in 2020, 4.0L/100Km in 2015, 3.2L/100Km in 2030, the thermal efficiency of gasoline engines of passenger vehicles reaches 40% in 2020, the thermal efficiency of gasoline engines of passenger vehicles reaches 44% in 2025 years, and the thermal efficiency of gasoline engines of passenger vehicles reaches 48% in 2022030.
About 60% of the heat energy generated by an automobile engine is dissipated by exhaust gases, cylinder walls, heat radiation, etc. In order to improve the thermal efficiency of the engine, methods adopting lean combustion, high compression ratio, adiabatic technology and precise cooling system are widely applied, wherein the lean combustion technology is used as an engine working mode of the internal combustion engine, the air-fuel ratio can reach 65:1, which is much higher than the ratio of the stoichiometric method (14.7: 1 of gasoline), and the fuel used in each combustion is less, so that the engine has higher efficiency, is more economical and environment-friendly, and is a key technology for realizing 45% of thermal efficiency. However, the exhaust temperature of lean combustion is low, and turbocharging mainly utilizes the energy of engine exhaust to drive a compressor to realize supercharging of intake air, which greatly affects the efficiency of the turbocharger.
In the prior art, a turbocharger turbine with a water spraying device is provided, which utilizes latent heat of water evaporation to spray water to a turbine, reduces the temperature of exhaust gas at the turbine end, and is beneficial to improving the phenomenon of high temperature overspeed of the turbine when an engine works.
Therefore, it is necessary to provide an engine supercharging system and a vehicle thereof to solve the above technical problems.
Disclosure of Invention
The invention aims to provide an engine supercharging system and a vehicle thereof, which are used for overcoming the technical problem of low efficiency of a turbocharger of an engine due to a lean combustion technology in the prior art.
The invention is realized by the following technical scheme:
the invention provides an engine supercharging system, which comprises a cylinder, an air injection device, a turbocharger, an air inlet pipeline and an exhaust pipeline, wherein the cylinder is connected with the air injection device; the turbocharger comprises a compressor and a turbine; the air inlet end of the cylinder is connected with the compressor through the air inlet pipeline, and the air outlet end of the cylinder is connected with the turbine through the air outlet pipeline; the gas injection device comprises a gas rail and a natural gas nozzle connected with the gas rail, natural gas is stored in the gas rail, the natural gas nozzle is located at the end of the gas compressor, the gas compressor is provided with a gas compressor impeller, and the natural gas nozzle is used for injecting natural gas to the gas compressor impeller.
Further, the natural gas nozzle has a nozzle hole perpendicular to the compressor impeller.
Further, the intake duct includes an intake main pipe and intake manifolds respectively connected to the respective cylinders of the engine; and the air inlet manifold is provided with a pressure sensor, and the pressure sensor is used for detecting air inlet pressure.
Further, a temperature sensor is further arranged on the intake manifold and used for detecting the intake temperature.
Further, the engine supercharging system further comprises a control unit, the control unit is respectively electrically connected with the pressure sensor and the temperature sensor, and the control unit is used for controlling the injection time of the natural gas nozzle according to the intake pressure and the intake temperature and forming a natural gas injection map based on the intake pressure and the intake temperature.
Further, when the engine demand pressure is greater than the intake pressure, or the intake temperature is greater than 25 ℃, the controller controls the injection time of the natural gas nozzle according to the natural gas injection map; and when the engine demand pressure is not greater than the intake pressure or the intake temperature is less than 25 ℃, the controller controls the natural gas nozzle to be out of operation.
Furthermore, a throttle valve and an intercooler are arranged on the air inlet main pipe, the throttle valve is used for adjusting the air inflow of air entering the cylinder, and the intercooler is used for cooling the air entering the cylinder.
Further, the exhaust duct certainly the cylinder includes exhaust manifold, first exhaust in proper order and is responsible for and the second exhaust is responsible for, the access connection of turbine first exhaust is responsible for, the exit linkage of turbine the second exhaust is responsible for, the second exhaust is responsible for and is equipped with three way catalyst converter, three way catalyst converter is used for purifying turbine exhaust waste gas.
Furthermore, a second pressure sensor is arranged on the gas rail and used for detecting the pressure value of the natural gas in the gas rail.
Correspondingly, the invention further provides a vehicle which comprises the engine supercharging system.
The implementation of the invention has the following beneficial effects:
1. according to the engine supercharging system and the vehicle thereof, the natural gas nozzle is arranged at the compressor end of the turbocharger to spray natural gas to the compressor impeller, and the gas temperature at the rear end of the compressor is reduced by utilizing the characteristics of thermal expansion and latent heat of evaporation of the natural gas, so that the increase of the inlet gas temperature caused by the turbocharger is avoided, the inlet gas charge of the engine is improved, and the efficiency of the turbocharger is further improved;
2. according to the engine supercharging system and the vehicle thereof, the natural gas nozzle is arranged at the end of the compressor of the turbocharger, the gas temperature at the rear end of the compressor is reduced by utilizing the characteristics of thermal expansion and latent heat of evaporation of natural gas, and the increase of the inlet gas temperature caused by the turbocharger is avoided, so that the original emission of nitrogen oxides of the engine can be effectively reduced, and the environmental protection requirement of the vehicle is favorably met;
3. according to the engine supercharging system and the vehicle thereof, the injection pulse width of the natural gas nozzle is controlled according to the air inlet pressure and the air inlet temperature, the natural gas injection diagram is formed through calibration, and the natural gas injection diagram is operated when the engine works, so that the high-efficiency and energy-saving design of the engine is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions and advantages of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic illustration of the engine boosting system of the present invention;
wherein the reference numerals in the figures correspond to: the system comprises a 1-throttle valve, a 2-compressor, a 3-intercooler, a 4-cylinder, a 5-turbine, a 6-three-way catalyst, a 7-air rail, an 8-natural gas nozzle and a 9-second pressure sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following examples. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms first, second, third and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Examples
In the present embodiment, referring to fig. 1, there is provided an engine supercharging system, including a cylinder 4, an air injection device, a turbocharger, an air intake duct, and an exhaust duct; the turbocharger comprises a compressor 2 and a turbine 5; the air inlet end of the cylinder 4 is connected with the air compressor 2 through an air inlet pipeline, and the air outlet end of the cylinder 4 is connected with the turbine 5 through an air outlet pipeline; the gas injection device comprises a gas rail 7 and a natural gas nozzle 8 connected with the gas rail 7, natural gas is stored in the gas rail 7, the natural gas nozzle 8 is positioned at the end of the gas compressor 2, the gas compressor 2 is provided with a gas compressor impeller, the gas compressor impeller is used for guiding gas into the working impeller without impact to reduce the gas flow impact loss, and the natural gas nozzle 8 is used for injecting natural gas to the gas compressor impeller. According to the engine supercharging system, the natural gas is sprayed to the compressor impeller through the natural gas nozzle 8 arranged at the end of the compressor 2, the gas temperature at the rear end of the compressor is reduced by utilizing the characteristics of thermal expansion and latent heat of evaporation of the natural gas, the rise of the inlet gas temperature caused by the turbocharger is avoided, the inlet gas charge of the engine is improved, the efficiency of the turbocharger is further improved, and the efficient energy-saving design of the engine is facilitated; on the other hand, the main emissions of automobiles are Nitrogen Oxides (NO)x) The first condition for generating the nitrogen oxide is high temperature, the combination of nitrogen and oxygen can be carried out only under the high temperature condition, and the generation amount and the original discharge amount of the nitrogen oxide can be obviously reduced due to the reduction of the air inlet temperature, thereby being beneficial to meeting the environmental protection requirement of vehicles.
In a specific embodiment, the natural gas nozzle 8 is provided with a spray hole which is perpendicular to the compressor impeller, and the structural design is favorable for the stable flow of the natural gas sprayed from the natural gas nozzle 8 after entering the compressor impeller, so that a good cooling effect can be achieved, and the stable operation of the engine can be ensured.
In one specific embodiment, the turbocharger body is used as a core component of engine pressurization, and the basic structure of the turbocharger body is divided into an air inlet end, an air outlet end and a connecting part in the middle, wherein the air inlet end is a compressor, the compressor is provided with a compressor impeller, the air outlet end is provided with a turbine, the turbine is provided with a turbine impeller, the compressor and the turbine are responsible for connecting the compressor and the turbine, and a bearing chamber is provided with a turbine shaft which is responsible for connecting and supporting the compressor impeller and the turbine impeller. The working process of the turbocharger comprises the following steps: the exhaust gas from the engine drives the turbine wheel at the exhaust end of the turbine wheel to rotate, thereby driving the compressor wheel at the other side connected with the turbine wheel to rotate simultaneously. The air compressor impeller sucks air from the air inlet forcibly, after the air is compressed by the rotation of the blades, the compressed air is injected into the cylinder for combustion, the combusted waste gas is discharged from the exhaust pipe and enters the turbine, and the actions are repeated.
In a particular embodiment, the intake duct comprises an intake main and an intake manifold connected respectively to the cylinders 4 of the engine, the function of the intake manifold being to distribute the air as evenly as possible to the cylinders 4; and a pressure sensor is arranged on the air inlet manifold and used for detecting air inlet pressure.
In a specific embodiment, a temperature sensor is further arranged on the intake manifold, and the temperature sensor is used for detecting the temperature of the intake air.
In a specific embodiment, the engine supercharging system further comprises a control unit, the control unit is respectively electrically connected with the pressure sensor and the temperature sensor, and the control unit is used for controlling the injection time of the natural gas nozzle 8 according to the intake pressure and the intake temperature to form a natural gas injection map based on the intake pressure and the intake temperature. When the engine runs, the natural gas injection diagram can be consulted according to the actual intake pressure and the actual intake temperature, and the injection quantity of the natural gas can be determined. When the natural gas injection diagram is calibrated, on the premise of meeting the intake pressure, the intake temperature is reduced as much as possible, so that the supercharging efficiency of the turbocharging device is improved as much as possible.
In other embodiments, the air intake amount of the engine can be obtained, and a natural gas injection map based on the air intake pressure, the air intake temperature and the air intake amount is formed by calibrating the air intake pressure, the air intake temperature, the air intake amount and the natural gas injection time.
In one embodiment, since the intake air temperature is 25 ℃ in the normal intake air state, the controller controls the injection timing of the natural gas injection nozzle 8 according to the natural gas injection map when the engine demand pressure is greater than the intake air pressure, or the intake air temperature is greater than 25 ℃.
In one specific embodiment, the controller controls the natural gas nozzle 8 not to be operated when the engine demand pressure is not greater than the intake air pressure, or the intake air temperature is less than 25 ℃.
In a specific embodiment, a throttle valve 1 is arranged on the air inlet main pipe, the throttle valve 1 is a controllable valve for controlling air to enter the engine, and the throttle valve 1 is used for adjusting the air inlet amount of air entering a cylinder 4.
In a specific embodiment, the throttle valve 1 is an electronic throttle valve, and the opening angle of the throttle valve is controlled mainly by a throttle position sensor according to the energy required by the engine, so as to adjust the amount of intake air.
In a specific embodiment, when the intake air temperature increases, not only the charging efficiency is affected, but also knocking is easily generated, so that a device for lowering the intake air temperature is provided, that is, the intercooler 3, and the intercooler 3 is used for cooling the air entering the cylinder 4. The intercooler 3 is arranged on the air inlet main pipe and is arranged between the outlet of the turbocharger and the air inlet pipe, the intercooler 3 is cooled by air or water, and the heat of the air is dissipated into the atmosphere through cooling so as to reduce the temperature of the compressed air, improve the density and prevent the engine from knocking.
In a specific embodiment, the exhaust pipeline comprises an exhaust manifold, a first exhaust main pipe and a second exhaust main pipe from the cylinder 4 in sequence, the inlet of the turbine 5 is connected with the first exhaust main pipe, the outlet of the turbine 5 is connected with the second exhaust main pipe, the second exhaust main pipe is provided with a three-way catalyst 6, and the three-way catalyst 6 is used forAfter purifying the exhaust gas from the turbine 5, the three-way catalyst 6 can discharge CO, HC and NO from the exhaust gas of the automobilexAnd the harmful gases are converted into harmless carbon dioxide, water and nitrogen through oxidation and reduction, so that the automobile exhaust is purified.
In a specific embodiment, the gas rail 7 is a low-pressure gas rail, and the second pressure sensor 9 is disposed on the gas rail 7, and the second pressure sensor 9 is configured to detect a pressure value of the natural gas in the gas rail 7.
According to the starting pressurization system, the natural gas nozzle is arranged at the compressor end of the turbocharger, natural gas is sprayed at the compressor end, and the characteristics of heated expansion and latent heat of evaporation of the natural gas are utilized, so that the rising of the air inlet temperature caused by the turbocharger is avoided, the gas temperature at the rear end of the compressor is favorably reduced, the air inlet charge is improved, and the efficiency of the turbocharger is further improved; moreover, because the air inlet temperature is reduced, the original discharge amount of nitrogen oxides of the engine can be effectively reduced, and the environmental protection requirement of the vehicle can be met; in addition, the injection pulse width of the natural gas nozzle is controlled according to the air inlet pressure and the air inlet temperature, a natural gas injection diagram is formed through calibration, and the natural gas injection diagram is operated when the engine works, so that the high-efficiency and energy-saving design of the engine is facilitated.
Another embodiment of the present invention provides a vehicle including the engine boosting system in the above-described embodiment.
The above embodiment of the invention has the following beneficial effects:
1. according to the engine supercharging system and the vehicle thereof, the natural gas nozzle is arranged at the compressor end of the turbocharger to spray natural gas to the compressor impeller, and the gas temperature at the rear end of the compressor is reduced by utilizing the characteristics of thermal expansion and latent heat of evaporation of the natural gas, so that the increase of the inlet gas temperature caused by the turbocharger is avoided, the inlet gas charge of the engine is improved, and the efficiency of the turbocharger is further improved;
2. according to the engine supercharging system and the vehicle thereof, the natural gas nozzle is arranged at the end of the compressor of the turbocharger, the gas temperature at the rear end of the compressor is reduced by utilizing the characteristics of thermal expansion and latent heat of evaporation of natural gas, and the increase of the inlet gas temperature caused by the turbocharger is avoided, so that the original emission of nitrogen oxides of the engine can be effectively reduced, and the environmental protection requirement of the vehicle is favorably met;
3. according to the engine supercharging system and the vehicle thereof, the injection pulse width of the natural gas nozzle is controlled according to the air inlet pressure and the air inlet temperature, the natural gas injection diagram is formed through calibration, and the natural gas injection diagram is operated when the engine works, so that the high-efficiency and energy-saving design of the engine is facilitated.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An engine supercharging system, characterized by comprising a cylinder (4), an air injection device, a turbocharger, an air intake duct and an exhaust duct;
the turbocharger comprises a compressor (2) and a turbine (5);
the air inlet end of the cylinder (4) is connected with the compressor (2) through the air inlet pipeline, and the air outlet end of the cylinder (4) is connected with the turbine (5) through the air outlet pipeline;
the gas injection device comprises a gas rail (7) and a natural gas nozzle (8) connected with the gas rail (7), natural gas is stored in the gas rail (7), the natural gas nozzle (8) is located at the end of the gas compressor (2), the gas compressor (2) is provided with a gas compressor impeller, and the natural gas nozzle (8) is used for injecting natural gas to the gas compressor impeller.
2. The engine supercharging system according to claim 1, characterized in that the natural gas nozzle (8) has a nozzle orifice which is perpendicular to the compressor wheel.
3. An engine supercharging system according to claim 1, characterized in that the intake conduit comprises an intake main and an intake manifold respectively connected to each of the cylinders (4) of the engine;
and the air inlet manifold is provided with a pressure sensor, and the pressure sensor is used for detecting air inlet pressure.
4. The engine boosting system according to claim 3, wherein a temperature sensor is further provided on the intake manifold for detecting an intake air temperature.
5. The engine supercharging system according to claim 4, characterized by further comprising a control unit electrically connected to the pressure sensor and the temperature sensor, respectively, for controlling the injection timing of the natural gas injector (8) in accordance with the intake air pressure and the intake air temperature to form a natural gas injection map based on the intake air pressure and the intake air temperature.
6. The engine supercharging system according to claim 5, characterized in that the controller controls the injection time of the natural gas injection nozzle (8) in accordance with the natural gas injection map when the engine demand pressure is greater than the intake air pressure, or the intake air temperature is greater than 25 ℃;
when the engine demand pressure is not greater than the intake pressure, or the intake temperature is less than 25 ℃, the controller controls the natural gas nozzle (8) to be inoperative.
7. An engine supercharging system according to claim 3, characterized in that a throttle valve (1) and an intercooler (3) are provided in the main intake pipe, the throttle valve (1) being used to adjust the amount of intake air into the cylinder (4), and the intercooler (3) being used to cool the air into the cylinder (4).
8. The engine supercharging system according to claim 1, characterized in that the exhaust duct comprises an exhaust manifold, a first exhaust main pipe and a second exhaust main pipe in this order from the cylinder (4), an inlet of the turbine (5) is connected to the first exhaust main pipe, an outlet of the turbine (5) is connected to the second exhaust main pipe, and a three-way catalyst (6) is provided on the second exhaust main pipe, and the three-way catalyst (6) is used for purifying exhaust gas discharged from the turbine (5).
9. The engine supercharging system according to claim 1, characterized in that a second pressure sensor (9) is provided on the air rail (7), the second pressure sensor (9) being configured to detect a pressure value of the natural gas within the air rail (7).
10. A vehicle comprising an engine boosting system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010094627.3A CN111336001A (en) | 2020-02-13 | 2020-02-13 | Engine supercharging system and vehicle thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010094627.3A CN111336001A (en) | 2020-02-13 | 2020-02-13 | Engine supercharging system and vehicle thereof |
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| CN111336001A true CN111336001A (en) | 2020-06-26 |
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| CN202010094627.3A Pending CN111336001A (en) | 2020-02-13 | 2020-02-13 | Engine supercharging system and vehicle thereof |
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Citations (5)
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|---|---|---|---|---|
| JP2012149537A (en) * | 2011-01-17 | 2012-08-09 | Toyota Motor Corp | Fuel feed system for dual fuel engine |
| CN103321782A (en) * | 2013-07-11 | 2013-09-25 | 烟台杰瑞石油服务集团股份有限公司 | Dual-fuel modified system |
| JP2014098351A (en) * | 2012-11-15 | 2014-05-29 | Nippon Soken Inc | Supercharging internal combustion engine system |
| US20180087448A1 (en) * | 2016-09-28 | 2018-03-29 | Caterpillar Inc. | Turbocharger having cooling arrangement for compressor and method thereof |
| CN109057978A (en) * | 2018-06-25 | 2018-12-21 | 重庆科克发动机技术有限公司 | A kind of control system of dual fuel engine |
-
2020
- 2020-02-13 CN CN202010094627.3A patent/CN111336001A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012149537A (en) * | 2011-01-17 | 2012-08-09 | Toyota Motor Corp | Fuel feed system for dual fuel engine |
| JP2014098351A (en) * | 2012-11-15 | 2014-05-29 | Nippon Soken Inc | Supercharging internal combustion engine system |
| CN103321782A (en) * | 2013-07-11 | 2013-09-25 | 烟台杰瑞石油服务集团股份有限公司 | Dual-fuel modified system |
| US20180087448A1 (en) * | 2016-09-28 | 2018-03-29 | Caterpillar Inc. | Turbocharger having cooling arrangement for compressor and method thereof |
| CN109057978A (en) * | 2018-06-25 | 2018-12-21 | 重庆科克发动机技术有限公司 | A kind of control system of dual fuel engine |
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