CN106762237A - A kind of engine - Google Patents
A kind of engine Download PDFInfo
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- CN106762237A CN106762237A CN201611166814.8A CN201611166814A CN106762237A CN 106762237 A CN106762237 A CN 106762237A CN 201611166814 A CN201611166814 A CN 201611166814A CN 106762237 A CN106762237 A CN 106762237A
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Classifications
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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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/025—Adding water
- F02M25/028—Adding water into the charge intakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/18—Indicating devices; Other safety devices concerning coolant pressure, coolant flow, or liquid-coolant level
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
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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
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/02—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being water or steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/04—Pressure
- F01P2025/06—Pressure for determining flow
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
本发明提供一种发动机，包括发动机燃烧系统、冷却系统和喷水系统，所述喷水系统由喷水器、水压传感器、电磁阀、水泵、过滤器水箱、水位传感器和注水器通过水管依次连接构成，所述喷水系统还包括控制系统，所述控制系统由水压传感器、水位传感器、电磁阀、水泵和电子控制单元组成闭环控制回路，根据所述水压传感器反馈并通过所述电子控制单元控制所述水泵泵水压力从而改变喷水压力，通过所述电子控制单元控制所述电磁阀开启角度控制喷水量。该发动机通过喷水系统将水伴随新鲜空气进入燃烧室，改善缸内燃烧情况，起到降低燃烧室内温度，抑制爆震的作用。
The invention provides an engine, which includes an engine combustion system, a cooling system and a water injection system. The water injection system consists of a water sprayer, a water pressure sensor, a solenoid valve, a water pump, a filter water tank, a water level sensor and a water injector through water pipes in sequence. The water spray system also includes a control system, and the control system is composed of a water pressure sensor, a water level sensor, a solenoid valve, a water pump and an electronic control unit to form a closed-loop control loop. According to the feedback of the water pressure sensor and through the electronic The control unit controls the pumping pressure of the water pump to change the water spray pressure, and the electronic control unit controls the opening angle of the electromagnetic valve to control the water spray volume. The engine injects water into the combustion chamber with fresh air through the water spray system to improve the combustion in the cylinder, reduce the temperature in the combustion chamber and suppress knocking.
Description
技术领域technical field
本发明涉及汽车安全设备技术领域，特别是涉及一种应用于高压缩比缸内直喷发动机的喷水系统。The invention relates to the technical field of automobile safety equipment, in particular to a water spray system applied to a high compression ratio in-cylinder direct injection engine.
背景技术Background technique
未来的汽油发动机在满足日益严苛的油耗及排放法规的同时，同样需要为用户提供高扭矩，高功率及低成本的产品。提升压缩比、小型增压结合缸内直喷可以提升发动机热效率，提升燃油经济型，但随着压缩比、增压化的提高，在中高负荷时由于缸内温度过高会引起爆震，甚至超级爆震，同样会使发动机零部件在极端条件下运行，影响零部件耐久性，从而抑制发动机热效率的提升。Future gasoline engines need to provide users with high torque, high power and low cost products while meeting increasingly stringent fuel consumption and emission regulations. Improving the compression ratio, small supercharging combined with direct injection in the cylinder can improve the thermal efficiency of the engine and improve fuel economy. However, with the increase of the compression ratio and supercharging, the high temperature in the cylinder will cause knocking and even Super-knock will also make engine components run under extreme conditions, affecting the durability of components, thereby inhibiting the improvement of engine thermal efficiency.
为抑制高压缩比、小型增压和缸内直喷引发的爆震，可以通过采用废弃再循环(EGR)系统，可变压缩比，Miller循环及喷水技术，但采用EGR技术，发动机零部件改动较大，且随着EGR浓度的提高，缸内混合气内氧气浓度随之降低，从而造成缸内混合气难以点燃；可变压缩比应用成本较高，且运动副增多，从而使摩擦功增高；Miller循环会影响进气滚流，且进气回流会增加增压器控制难度；而喷水技术相比其他技术，具有控制简单，工况实用性强等优势。专利CN201110234776.6提出了一种发动机进气管喷水系统，实现对发动机燃烧室掺水量可控制，进气管距离燃烧室较远，易形成水滴且未对极冷环境温度下的冰冻隐患未提出解决方法，且喷水质量无法保证。In order to suppress the knock caused by high compression ratio, small supercharging and direct injection in cylinder, waste recirculation (EGR) system, variable compression ratio, Miller cycle and water injection technology can be adopted, but EGR technology, engine parts The change is large, and with the increase of EGR concentration, the oxygen concentration in the cylinder mixture decreases, which makes it difficult to ignite the cylinder mixture; the application cost of variable compression ratio is high, and the number of motion pairs increases, so that the friction work Increased height; the Miller cycle will affect the tumble flow of the intake air, and the return flow of the intake air will increase the difficulty of supercharger control; compared with other technologies, the water injection technology has the advantages of simple control and strong practicability in working conditions. Patent CN201110234776.6 proposes a water injection system for the engine intake pipe, which can control the amount of water mixed in the engine combustion chamber. The intake pipe is far away from the combustion chamber, and it is easy to form water droplets and does not solve the hidden danger of freezing in extremely cold ambient temperatures. method, and the quality of spray water cannot be guaranteed.
发明内容Contents of the invention
本发明实施例的目的包括提供一种发动机，通过喷水系统将水伴随新鲜空气进入燃烧室，改善缸内燃烧情况，起到降低燃烧室内温度，抑制爆震的作用。The purpose of the embodiments of the present invention includes providing an engine, through which water enters the combustion chamber along with fresh air through the water injection system, so as to improve the combustion condition in the cylinder, reduce the temperature in the combustion chamber, and suppress knocking.
本发明实施例提供一种发动机，包括发动机燃烧系统、冷却系统和喷水系统，所述喷水系统由喷水器、水压传感器、电磁阀、水泵、过滤器、水箱、水位传感器和注水器通过水管依次连接构成，所述喷水系统还包括控制系统，所述控制系统由水压传感器、水位传感器、电磁阀、水泵和电子控制单元组成闭环控制回路，根据所述水压传感器反馈并通过所述电子控制单元控制所述水泵泵水压力从而改变喷水压力，通过所述电子控制单元控制所述电磁阀开启角度控制喷水量。An embodiment of the present invention provides an engine, including an engine combustion system, a cooling system, and a water injection system. The water spray system also includes a control system, which is composed of a water pressure sensor, a water level sensor, a solenoid valve, a water pump and an electronic control unit to form a closed-loop control loop. According to the feedback of the water pressure sensor and through The electronic control unit controls the pumping pressure of the water pump to change the water spray pressure, and the electronic control unit controls the opening angle of the solenoid valve to control the water spray volume.
优选地，所述过滤器为三层过滤装置，所述过滤器包括注水器过滤器、水箱过滤器和水轨过滤器。Preferably, the filter is a three-layer filter device, and the filter includes a water injector filter, a water tank filter and a water rail filter.
优选地，所述发动机燃烧系统包括活塞、火花塞、喷油器、进气门、排气门、进气道和排气道，所述喷水器设置于所述进气道靠近所述进气门处。Preferably, the engine combustion system includes a piston, a spark plug, a fuel injector, an intake valve, an exhaust valve, an intake port and an exhaust port, and the water injector is arranged at the intake port close to the intake port. at the door.
优选地，所述冷却系统包括冷却液和冷却液管道，所述冷却液管道与所述水箱集成设置。Preferably, the cooling system includes a cooling liquid and a cooling liquid pipe, and the cooling liquid pipe is integrated with the water tank.
优选地，所述喷水系统还包括报警单元，所述喷水系统中的水位传感器检测所述水箱内水量情况，低于限定值时发送报警信息至所述报警单元，并通过所述注水器进行注水。Preferably, the water spray system further includes an alarm unit, the water level sensor in the water spray system detects the water level in the water tank, and sends an alarm message to the alarm unit when it is lower than a limit value, and the water level sensor in the water injector Perform water injection.
本发明实施例提供的一种发动机，该发动机采用特有的喷水系统，喷水器置于进气道，利用水比热容较大的特性，将水伴随新鲜空气进入燃烧室，改善缸内燃烧情况，可有效降低燃烧室的室内温度，从而降低NOx排放及中高负荷燃烧室爆震倾向，最大限度保证高压缩比、小型增压及缸内直喷技术所带来的热效率提升。An engine provided by an embodiment of the present invention, the engine adopts a unique water spray system, the water sprayer is placed in the intake port, and water is brought into the combustion chamber along with fresh air by utilizing the characteristic of large specific heat capacity of water, so as to improve the combustion situation in the cylinder , which can effectively reduce the indoor temperature of the combustion chamber, thereby reducing NOx emissions and the tendency of the combustion chamber knocking at medium and high loads, and maximizing the improvement of thermal efficiency brought about by high compression ratio, small supercharger and in-cylinder direct injection technology.
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其他目的、特征和优点能够更明显易懂，以下特举较佳实施例，并配合附图，详细说明如下。The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.
附图说明Description of drawings
图1是本发明实施例提供的一种发动机的喷水系统的主体结构示意图。Fig. 1 is a schematic diagram of the main structure of a water injection system of an engine provided by an embodiment of the present invention.
具体实施方式detailed description
为更进一步阐述本发明为达成预定目的所采取的技术手段及功效，以下结合附图及较佳实施例，对依据本发明提出的一种发动机的具体实施方式、方法、步骤、结构、特征及功效，详细说明如后。In order to further explain the technical means and effects adopted by the present invention to achieve the intended purpose, the specific implementation, methods, steps, structures, features and features of an engine proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. Efficacy, detailed as follows.
有关本发明的前述及其他技术内容、特点及功效，在以下配合参考图式的较佳实施例详细说明中将可清楚的呈现。通过具体实施方式的说明，当可对本发明为达成预定目的所采取的技术手段及功效得以更加深入且具体的了解，然而所附图式仅是提供参考与说明之用，并非用来对本发明加以限制。The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings. Through the description of specific implementation methods, the technical means and effects of the present invention to achieve the intended purpose can be understood more deeply and specifically, but the attached drawings are only for reference and description, and are not used to explain the present invention limit.
请参考图1，图1是本发明实施例提供的一种发动机的喷水系统的主体结构示意图。如图1所示，该发动机包括发动机燃烧系统10、冷却系统20和喷水系统30，该发动机燃烧系统10包括活塞101、火花塞102、喷油器103、进气门104、排气门105、进气道106和排气道107。Please refer to FIG. 1 . FIG. 1 is a schematic diagram of the main structure of a water injection system for an engine provided by an embodiment of the present invention. As shown in Figure 1, this engine comprises engine combustion system 10, cooling system 20 and water injection system 30, and this engine combustion system 10 comprises piston 101, spark plug 102, fuel injector 103, intake valve 104, exhaust valve 105, Intake channel 106 and exhaust channel 107 .
该喷水系统30由喷水器301、水压传感器302、电磁阀303、水泵304、过滤器305、水箱306、水位传感器307和注水器308通过水管依次连接构成，该喷水系统30还包括控制系统300，该控制系统300由水压传感器302、水位传感器307、电磁阀303、水泵304和电子控制单元(ECU)309组成闭环控制回路。该控制系统300可灵活改变喷水量，在低负荷工况喷水量需求较低时，经ECU309控制电磁阀303开启较小角度，并根据标定结果选择最优喷水压力，由ECU309控制电动水泵304改变泵水压力；水位传感器307检测水箱306内部水量情况，低于限定值时报警，通过注水器308进行注水；而在中高负荷喷水量需求较多时，根据标定结果控制泵水压力及电磁阀303开启角度控制喷水量。在本发明实施例中，该过滤器305包括注水器过滤器3051、水箱过滤器3053和水轨过滤器3055。The water spray system 30 is composed of a water sprayer 301, a water pressure sensor 302, a solenoid valve 303, a water pump 304, a filter 305, a water tank 306, a water level sensor 307 and a water injector 308, which are sequentially connected through water pipes. The water spray system 30 also includes A control system 300 , the control system 300 is composed of a water pressure sensor 302 , a water level sensor 307 , a solenoid valve 303 , a water pump 304 and an electronic control unit (ECU) 309 to form a closed-loop control loop. The control system 300 can flexibly change the water spray volume. When the demand for water spray volume is low under low-load conditions, the ECU309 controls the solenoid valve 303 to open a small angle, and selects the optimal water spray pressure according to the calibration result, and the ECU309 controls the electric motor. The water pump 304 changes the pump water pressure; the water level sensor 307 detects the water volume inside the water tank 306, and when it is lower than the limit value, an alarm is issued, and water is injected through the water injector 308; when there is a large demand for water injection at medium and high loads, the pump water pressure and pressure are controlled according to the calibration results. The opening angle of the electromagnetic valve 303 controls the amount of sprayed water. In the embodiment of the present invention, the filter 305 includes a water injector filter 3051 , a water tank filter 3053 and a water rail filter 3055 .
该喷水系统30还包括报警单元(图中未标示)，该喷水系统30中的水位传感器307检测该水箱306内水量情况，低于限定值时发送报警信息至该报警单元，并通过该注水器308进行注水。该冷却系统20包括冷却液和冷却液管道200，该冷却液管道200与该水箱306集成设置，用于冬季水箱温度的维持，预防冰冻。在本发明实施例中，该喷水器301设置于该进气道106靠近该进气门104处，水雾随新鲜空气进入燃烧室，降低燃烧室内部温度，从而抑制爆震，进而助益于高压缩比、高增压化及缸内直喷降油耗的作用。The sprinkler system 30 also includes an alarm unit (not shown in the figure), the water level sensor 307 in the sprinkler system 30 detects the water situation in the water tank 306, and sends an alarm message to the alarm unit when it is lower than a limit value, and through the The water injector 308 injects water. The cooling system 20 includes a cooling liquid and a cooling liquid pipeline 200. The cooling liquid pipeline 200 is integrated with the water tank 306 for maintaining the temperature of the water tank in winter and preventing freezing. In the embodiment of the present invention, the water sprayer 301 is arranged at the intake port 106 close to the intake valve 104, and the water mist enters the combustion chamber with fresh air to reduce the internal temperature of the combustion chamber, thereby suppressing knocking and further benefiting the combustion chamber. In high compression ratio, high supercharging and in-cylinder direct injection to reduce fuel consumption.
本发明实施例提供一种发动机，该发动机采用特有的喷水系统，设置多层过滤，保证水质；将发动机冷却管路与水箱集成，预防环境温度极低时的冰冻；根据ECU接收到的水压信息控制水泵泵水压力，并根据工况点及缸内燃烧情况控制电磁阀开启角度，喷水作用工况根据标定结果确定，从而抑制中高负荷爆震倾向，提高发动机热效率，降低油耗，其中喷水技术可有效降低了燃烧室的进气温度，同时利用进气道喷水技术或缸内喷水能够大幅度降低NOx排放量，并具有节能的作用。The embodiment of the present invention provides an engine. The engine adopts a unique water spray system and is equipped with multi-layer filtration to ensure water quality; the engine cooling pipeline is integrated with the water tank to prevent freezing when the ambient temperature is extremely low; according to the water received by the ECU Water pressure information is used to control the pump water pressure of the water pump, and the opening angle of the solenoid valve is controlled according to the working point and the combustion situation in the cylinder. The working condition of the water spray is determined according to the calibration result, thereby suppressing the tendency of knocking at medium and high loads, improving the thermal efficiency of the engine, and reducing fuel consumption. The water injection technology can effectively reduce the intake air temperature of the combustion chamber, and at the same time, the water injection technology in the intake port or in the cylinder can greatly reduce the NOx emission, and has the effect of saving energy.
以上所述，仅是发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。The above description is only the preferred embodiment of the invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with the preferred embodiment, it is not intended to limit the present invention. Anyone who is familiar with this professional technology Personnel, without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or modifications to equivalent embodiments of equivalent changes, but as long as they do not depart from the content of the technical solution of the present invention, according to the technical content of the present invention In essence, any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.
Claims (5)
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| CN201611166814.8A CN106762237A (en) | 2016-12-16 | 2016-12-16 | A kind of engine |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108049990A (en) * | 2017-09-11 | 2018-05-18 | 同济大学 | A kind of system and control method using control internal combustion engine homogeneity compression-ignition of spraying water outside cylinder |
| CN108060992A (en) * | 2017-09-11 | 2018-05-22 | 同济大学 | A kind of system and control method using in-cylinder water injection control internal combustion engine homogeneity compression-ignition |
| CN108506122A (en) * | 2018-05-12 | 2018-09-07 | 陈向红 | High compression ratio ignition internal combustion engine and its working method |
| CN108547711A (en) * | 2018-03-09 | 2018-09-18 | 同济大学 | A kind of portable internal combustion machine water injector |
| CN109356750A (en) * | 2018-11-10 | 2019-02-19 | 天津大学 | A method for water injection of a fuel cell coupled engine for a passenger car |
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| CN111927669A (en) * | 2020-08-03 | 2020-11-13 | 北京理工大学 | Ignition type aviation heavy oil piston engine system and implementation method thereof |
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| CN107218157B (en) * | 2017-06-30 | 2019-07-12 | 贵州吉利发动机有限公司 | Engine water injection system and engine for recycling EGR condensate |
| CN107218157A (en) * | 2017-06-30 | 2017-09-29 | 贵阳吉利发动机有限公司 | Recycle the engine water injection system and engine of EGR condensed waters |
| CN108049990A (en) * | 2017-09-11 | 2018-05-18 | 同济大学 | A kind of system and control method using control internal combustion engine homogeneity compression-ignition of spraying water outside cylinder |
| CN108060992A (en) * | 2017-09-11 | 2018-05-22 | 同济大学 | A kind of system and control method using in-cylinder water injection control internal combustion engine homogeneity compression-ignition |
| CN108060992B (en) * | 2017-09-11 | 2020-10-02 | 同济大学 | A system and control method for controlling homogeneous compression ignition of an internal combustion engine by using in-cylinder water injection |
| CN108547711A (en) * | 2018-03-09 | 2018-09-18 | 同济大学 | A kind of portable internal combustion machine water injector |
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| CN111379634A (en) * | 2018-12-27 | 2020-07-07 | 广州汽车集团股份有限公司 | Lean burn engines and automobiles |
| CN111379634B (en) * | 2018-12-27 | 2021-03-12 | 广州汽车集团股份有限公司 | Lean burn engines and automobiles |
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