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WO2017088343A1 - 一种曲轴箱废气处理系统 - Google Patents

一种曲轴箱废气处理系统 Download PDF

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Publication number
WO2017088343A1
WO2017088343A1 PCT/CN2016/078802 CN2016078802W WO2017088343A1 WO 2017088343 A1 WO2017088343 A1 WO 2017088343A1 CN 2016078802 W CN2016078802 W CN 2016078802W WO 2017088343 A1 WO2017088343 A1 WO 2017088343A1
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Prior art keywords
oil
crankcase
exhaust gas
water
water separator
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PCT/CN2016/078802
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English (en)
French (fr)
Inventor
王永勤
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王永勤
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Publication of WO2017088343A1 publication Critical patent/WO2017088343A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil

Definitions

  • the invention relates to the technical field of automobile parts, in particular to a crankcase exhaust gas treatment system.
  • Exhaust gas is generated in the crankcase under the working condition of the engine.
  • the main components of this exhaust gas are: the combustible mixture HC and the water vapor H2O, and the mist oil in the crankcase when the engine operating temperature reaches 85-95 °C.
  • the unstable molecules also volatilize and are mixed in the exhaust gas.
  • the engine seals do not leak oil, reduce the pollution of the exhaust gas to the oil, so that the oil does not deteriorate, and the exhaust gas needs to be sucked into the engine's intake combustion system for secondary combustion, and then passed through the exhaust gas purification system. After being purified, it is discharged into the air.
  • crankcase exhaust gas in the crankcase exhaust gas treatment system shown in FIG. 1 of the specification enters the intake manifold directly through the crankcase ventilation pipe 14, and part of the exhaust gas of the crankcase 1 is also forcedly sucked into the intake manifold through the PCV valve 15.
  • the oil cracking reaction can still be used to generate hard carbon deposits.
  • the ceramic micropores that block the oxygen sensor and the three-way catalyst cause insufficient engine power, increased fuel consumption, excessive exhaust emissions, and increased maintenance costs.
  • crankcase exhaust gas treatment system capable of sufficiently purifying crankcase exhaust gas to prevent engine carbon deposition, which can remove waste engine oil vapor and water vapor in crankcase exhaust gas, thereby avoiding crankcase
  • the exhaust gas pollutes the intake combustion system and the exhaust gas purification system, and makes the combustion more fully, which improves the engine's power and reduces harmful gas emissions.
  • the present invention provides a crankcase exhaust gas treatment system including a crankcase valve chamber cover, a vent provided on the crankcase valve chamber cover, an air cleaner, and the An air filter in the air cleaner and a water separator disposed at the bottom of the air cleaner;
  • the oil water separator includes an exhaust gas inlet, a combustible mixture outlet, a condensing device disposed inside the oil water separator, and a chamber An oil-water sedimentation chamber at the bottom of the oil-water separator, the exhaust gas inlet is located above the oil-water sedimentation chamber, a drain outlet is arranged at the bottom of the oil-water sedimentation chamber, and a ventilation bellows is arranged between the exhaust gas inlet and the vent; After the crankcase exhaust gas passes through the ventilation bellows and the oil-water separator in turn, the waste engine oil vapor and water vapor are converted into liquid liquid discharged through the oil-water sedimentation chamber and the sewage outlet, and the combustible mixed gas (main component HC)
  • the ventilation bellows is characterized by a corrugated shape and has a length ranging from 40 to 80 cm.
  • the ventilation bellows is inclined upward from the venting port extending the crankcase exhaust gas outflow direction.
  • the oil water separator is disposed at the bottom of the air cleaner.
  • the invention Compared with the prior art, the invention has the beneficial effects that the invention utilizes the crankcase exhaust gas through the ventilation bellows to the oil-water separator, and skillfully utilizes the oil vapor, the water vapor and the combustible mixture (the main component is HC)
  • the molecular activities of the three gases are different and the temperature required for the conversion to liquid is different.
  • the waste machine oil vapor and steam are filtered out, and the condensed water and waste engine oil are filtered.
  • the liquid flows along the oil-water separator into the bottom of the oil-water sedimentation chamber and is discharged through the sewage outlet.
  • the clean combustible mixture passes through the air filter and enters the intake manifold and is delivered to the intake combustion system.
  • the combustible mixture entering the intake combustion system is clean and dry, avoiding the waste engine oil vapor and water vapor entering the intake combustion system and attaching to the throttle valve and the intake manifold wall to form a mucous membrane, thereby avoiding the dusty air viscosity.
  • the formation of thicker and thicker sludge on the mucous membrane and the accumulation of carbon after entering the combustion chamber and the exhaust gas purification system increase the sensitivity of the intake pressure sensor and the oxygen sensor, and make the combustion more complete, thus greatly reducing the cause.
  • FIG. 1 is a schematic structural view of a crankcase exhaust gas treatment system in the prior art
  • FIG. 2 is a schematic structural view of a crankcase exhaust gas treatment system provided by the present invention.
  • Fig. 1 is a schematic structural view of a crankcase exhaust gas treatment system in the prior art; wherein, 1 is a valve chamber cover, 2 is an air cleaner, 4 is an intake manifold, 5 is a throttle, and 11 is Crankcase valve chamber cover vent (exhaust gas outlet), 13 is the intake valve, 14 is the ventilation pipe, 15 is the PCV check valve, 21 is the air filter, 22 is the air filter air outlet, 23 is the air filter Air inlet, 41 is the intake pressure sensor.
  • crankcase exhaust gas directly enters the intake manifold through the crankcase ventilation pipe 14, and part of the exhaust gas of the crankcase 1 is also forcibly sucked into the intake manifold 4 through the PCV valve 15, and finally enters
  • the intake combustion system since the exhaust gas contains waste engine oil and water, entering the intake manifold 4 will adhere to the throttle valve 5 and the intake manifold wall to form a layer of mucosa, which is unfiltered when it comes from the air filter. When the dust is clean, it adheres.
  • Embodiment 1 In order to solve the above problems in the prior art crankcase exhaust gas treatment system, as shown in FIG. 2, the present invention provides a crankcase exhaust gas treatment system including a crankcase gas. a door cover 1, a vent 11 provided on the crankcase valve cover, an air cleaner 2, an air filter 21 disposed in the air cleaner 2, and a bottom portion of the air cleaner 2
  • the oil-water separator 3; the oil-water separator 3 includes an exhaust gas inlet 32, a combustible mixed gas outlet 34, a condensing device 33 disposed inside the oil-water separator 3, and an oil-water sedimentation chamber 31 disposed at the bottom of the oil-water separator 3, and the exhaust gas inlet 32 is located in the oil-water Above the sedimentation chamber 31, a drain outlet 311 is arranged at the bottom of the oil-water sedimentation chamber 31; a ventilation bellows 12 is arranged between the exhaust gas inlet 32 and the vent 11; the crankcase exhaust gas is sequentially ventilated by the ventilating bellows 12 and the oil-
  • the crankcase exhaust gas is sent to the oil-water separator 3 through the ventilation bellows 12, and after being condensed by the adhesion and condensation device 33 of the ventilation bellows 12, the water vapor in the exhaust gas and the waste engine oil vapor are filtered out and condensed.
  • the water and waste oil are discharged into the bottom of the oil-water sedimentation chamber 31 along the bottom of the oil-water separator 3 through the drain port 311, thereby obtaining a clean combustible gas mixture.
  • the clean combustible gas mixture is passed through the air filter element 21 and then sent to the intake combustion system through the air outlet 22 of the air cleaner 2.
  • the combustible mixed gas entering the intake combustion system is cleaned and dried, and the waste engine oil vapor and water vapor are prevented from entering the intake combustion system and adhering to the throttle valve 5 and the intake manifold wall to form a mucous membrane. It avoids the phenomenon that dusty air adheres to the mucous membrane to form thicker and thicker sludge, and also avoids the formation of hard carbon deposits when the waste oil vapor passes through the high temperature intake valve 13 and the combustion chamber and the exhaust gas purification system.
  • the intake combustion system and the exhaust gas purification system of the engine are kept clean for a long time, the sensitivity of the intake pressure sensor 41 and the oxygen sensor is improved, the normal combustion of the fuel in the combustion chamber is ensured, and the cause of the carbon deposition is greatly reduced.
  • Embodiment 2 In order to ensure that the combustible mixture entering the intake manifold 4 is clean, dry, or not contaminated by the dusty air entering from the air inlet 23, the technical feature is added on the basis of the above-mentioned embodiment 1: after the combustible mixture The gas at the outlet 34 is filtered through the air filter 21 and enters the intake manifold 4. The clean and dry combustion of the combustible gas mixture entering the intake combustion system is further ensured, so that the fuel in the combustion chamber is fully burned, the engine power is enhanced, and fuel is saved.
  • a sludge step is formed on the outer edge of the throttle valve 5 due to the mechanical switch of the throttle valve 5.
  • the intake air is hindered by the sludge step due to the small opening degree of the throttle valve 5. , so that the intake air amount does not match the opening degree of the throttle valve 5, resulting in insufficient intake air amount.
  • the combustible mixture is too rich, the combustion will be insufficient, resulting in a sharp increase in harmful gas emissions, increased fuel consumption, and unstable ignition. Due to the lack of oxygen in the crankcase exhaust gas, the heat of combustion of the oil in the exhaust gas cannot be utilized, and oxygen consumption is required.
  • the flame retardant water in the exhaust gas affects the normal combustion of the fuel, so the oil in the exhaust gas.
  • the water discharge not only prevents the formation of carbon deposits, but also allows the combustible mixture in the exhaust gas to be fully combusted, so that the power is increased and the fuel is saved. This embodiment can solve this problem.
  • Embodiment 3 Different from the above embodiment, the length of the ventilation bellows in the embodiment ranges from 40 to 80 cm; and the ventilation bellows 12 is inclined upward from the air outlet 11 in the direction in which the crankcase exhaust gas flows out.
  • the relatively stable molecular oil gas can be attached to the bellows to become the oil liquid, and the bellows is used as the ventilation pipe to increase the area in contact with the exhaust gas, and the exhaust gas is in the flow of the bellows due to
  • the specific shape of the bellows forms a lot of air swirls, so that the effect of separating the oil from the exhaust gas is obvious.
  • the embodiment defines that the ventilation bellows 12 is inclined upward from the vent 11 to extend the crankcase exhaust gas outflow direction, that is, the position of the vent 11 is slightly lower, and then In the embodiment, about three-quarters of the length of the bellows is higher than the vent 11 so that most of the oil can flow back into the crankcase, thereby reducing oil loss.
  • the embodiment defines that the length of the ventilation bellows is 40 cm-80 cm, because only the ventilation bellows separating the oil above 40 cm has the best effect, and the ventilation bellows below 40 cm has a small contact area with the exhaust gas, and the separation of the oil is The effect is not ideal, especially the old cars, European and American cars are more serious models of the suffocating; after the experiment, the new car uses 40cm-80cm ventilation bellows oil separation rate is about 70%, old cars or suffocating European cars The separation rate is about 50%, and the remaining part can be basically separated after being passed through the oil-water separator 3, discharged through the oil-water sedimentation chamber 31 and the sewage outlet 311 or collected in a quantitative container, and poured out on time, which is less polluting to the atmosphere and the environment.
  • Embodiment 4 The oil-water separator 3 is disposed at the bottom of the air cleaner. Since the temperature of the portion is low, the principle of oil-water separation utilized by the present invention is waste oil vapor, water vapor, and combustible mixture (main component HC). The temperature required to change to a liquid state is different, so the separation effect is better as the temperature difference is relatively large, so that the volume of the condensing device can be appropriately reduced according to the displacement of the vehicle, so the oil water separator is placed at the bottom of the air cleaner. It is a technical feature of the present invention that is both aesthetically pleasing and cost effective.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

一种曲轴箱废气处理系统，包括曲轴箱气门室罩盖（1）、设于曲轴箱气门室罩盖（1）上的通风口（11）、空气滤清器（2）、设于空气滤清器（2）内的空气滤芯（21）以及设于空气滤清器（2）底部的油水分离器（3）；油水分离器（3）包括废气入口（32）、可燃混合气出口（34）、设于油水分离器（3）内部的冷凝装置（33）以及设于油水分离器（3）底部的油水沉降室（31），废气入口（32）位于油水沉降室（31）上方，油水沉降室（31）底部设有排污口（311）；废气入口（32）与通风口（11）之间设有通风波纹管（12）；曲轴箱废气依次经通风波纹管（12）、油水分离器（3）后获得可燃混合气体，可燃混合气体经空气滤芯（21）进入进气燃烧系统。该装置能够将曲轴箱废气中的废机油蒸汽和水蒸气在进入进气燃烧系统前转变为液体并排除，避免了曲轴箱废气对进气燃烧系统和尾气净化系统的污染。

Description

一种曲轴箱废气处理系统
本申请要求于2015年11月26日提交中国专利局、申请号为201510859565.X、发明名称为“一种曲轴箱废气处理系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及汽车配件技术领域，特别涉及一种曲轴箱废气处理系统。
背景技术
发动机在工作状态下曲轴箱内会产生废气，这种废气主要成分3种：即可燃混合气HC和水蒸气H2O，以及当发动机工作温度达到85～95℃时，曲轴箱内的雾状机油中的不稳定分子也会挥发，混合在废气中。为了减少曲轴箱内的压力，使发动机各密封件不漏油，减少废气对机油的污染，使机油不变质，需要将废气吸入发动机的进气燃烧系统进行二次燃烧后，再经过尾气净化系统净化后排放在空气中。
在曲轴箱内释放的压力和进气系统的吸力作用下，废气中的可燃混合气、水蒸气及曲轴箱中雾状、不稳定的机油分子会一并被吸入发动机的进气燃烧系统和尾气净化系统，造成了这两大系统的污染，即油泥、积炭污染。就目前来说，点火式汽油发动机的积炭就像汽车的癌症，是普通存在的问题。
如说明书附图图1所示的曲轴箱废气处理系统中曲轴箱废气直接通过曲轴箱通风管14进入进气歧管，而且曲轴箱1的部分废气还通过PCV阀15强制吸入进气歧管4中，最后进入进气燃烧系统，由于废气中含有废机油和水，进入进气歧管4内会附着于节气门5、进气歧管壁上，形成一层粘膜，当遇到来自空气滤清器未滤净的灰尘时，便将之粘附，随着使用时间的延长，便形成了一层油泥，并且越来越厚，会影响进气压力传感器41的灵敏度；当废气经高温的进气门进入燃烧室，其中的机油蒸汽遇到高温会裂解形成坚硬的积炭，水蒸汽会阻碍燃料的正常燃烧；由于机油的燃烧速度慢，没燃烧完的废机油气体又会进入到尾气净化系统中，由于尾气净化系统的温度较高(400—600℃)，仍然可以使机油裂解反应生成坚硬的积炭，从 而堵塞氧传感器和三元催化器的陶瓷微孔，导致发动机动力不足、油耗增加、尾气排放超标、维修保养成本增加等。
发明内容
本发明要解决的技术问题是提供一种能够充分净化曲轴箱废气预防发动机积碳形成的曲轴箱废气处理系统，该处理装置能够去除曲轴箱废气中的废机油蒸汽和水蒸气，避免了曲轴箱废气对进气燃烧系统和尾气净化系统的污染，并使燃烧更充分，提升了发动机的动力，减少了有害气体的排放。
为解决上述技术问题，本发明提供了一种曲轴箱废气处理系统，包括曲轴箱气门室罩盖、设于所述曲轴箱气门室罩盖上的通风口、空气滤清器、设于所述空气滤清器内的空气滤芯以及设于空气滤清器底部的油水分离器；所述油水分离器包括废气入口、可燃混合气出口、设于所述油水分离器内部的冷凝装置以及设于所述油水分离器底部的油水沉降室，所述废气入口位于所述油水沉降室上方，所述油水沉降室底部设有排污口；所述废气入口与所述通风口之间设有通风波纹管；曲轴箱废气依次经所述通风波纹管、所述油水分离器后,其中的废机油蒸汽和水蒸气被转变为液态经油水沉降室和排污口排出，而获得的可燃混合气体(主要成分HC)经所述空气滤芯进入进气燃烧系统。
可选的，所述通风波纹管的特征为波纹状，且长度范围为40-80cm。
可选的，所述通风波纹管自所述通风口延曲轴箱废气流出方向向上倾斜设置。
可选的，所述油水分离器设于空气滤清器底部。
与现有技术相比，本发明的有益效果在于：本发明将曲轴箱废气通过通风波纹管输送至油水分离器的过程中，巧妙的利用了机油蒸汽、水蒸气和可燃混合气(主要成分为HC)三种气体的分子活性不同和转变为液体所需要的温度不同，经过通风波纹管的粘附和冷凝装置冷凝后滤除了废气中的废机油蒸气以及水蒸气，冷凝后的水和废机油液体沿油水分离器下流入油水沉降室底部经排污口排出。洁净的可燃混合气体通过空气滤芯后进入进气歧管中，并输送至进气燃烧系统中。经过本发明的废气经过处理后 进入进气燃烧系统的可燃混合气体洁净、干燥，避免了废机油蒸汽和水蒸气进入进气燃烧系统后附着于节气门和进气歧管壁上形成粘膜，也就避免了含灰尘的空气粘结到粘膜上形成越来越厚的油泥，以及进入燃烧室和尾气净化系统后产生积碳的现象，提高了进气压力传感器和氧传感器的灵敏度，使燃烧更充分，这样便大大减少了因积炭的原因造成的发动机动力不足、油耗增加、尾气排放超标、维修保养成本增加的概率。
说明书附图
下面结合附图对本发明作进一步说明：
图1是现有技术中曲轴箱废气处理系统的结构示意图；
图2是本发明提供的曲轴箱废气处理系统的结构示意图。
具体实施方式
参见图1，图1是现有技术中曲轴箱废气处理系统的结构示意图；其中，1为气门室罩盖，2为空气滤清器，4为进气岐管，5为节气门，11为曲轴箱气门室罩盖通风口(废气出口)，13为进气门，14为通风管，15为PCV单向阀，21为空气滤芯，22为空气滤清器空气出口，23为空气滤清器空气入口，41为进气压力传感器。
现有技术中的曲轴箱废气处理系统中曲轴箱废气直接通过曲轴箱通风管14进入进气歧管，而且曲轴箱1的部分废气还通过PCV阀15强制吸入进气歧管4中，最后进入进气燃烧系统，由于废气中含有废机油和水，进入进气歧管4内会附着于节气门5、进气歧管壁上，形成一层粘膜，当遇到来自空气滤清器未滤净的灰尘时，便将之粘附，随着使用时间的延长，便形成了一层油泥，并且越来越厚，会影响进气压力传感器41的灵敏度；当废气经高温的进气门进入燃烧室，其中的机油蒸汽遇到高温会裂解形成坚硬的积炭，水蒸汽会阻碍燃料的正常燃烧；由于机油的燃烧速度慢，没燃烧完的废机油气体又会进入到尾气净化系统中，由于尾气净化系统的温度较高(400—600℃)，仍然可以使机油裂解反应生成坚硬的积炭，从而堵塞氧传感器和三元催化器的陶瓷微孔，导致发动机动力不足、油耗增加、尾气排放超标、维修保养成本增加等。
实施例1：为了解决现有技术中的曲轴箱废气处理系统存在的上述问题，如图2所示，本发明提供了一种曲轴箱废气处理系统，包括曲轴箱气 门室罩盖1、设于所述曲轴箱气门室罩盖上的通风口11、空气滤清器2、设于空气滤清器2内的空气滤芯21以及设于空气滤清器2底部的油水分离器3；油水分离器3包括废气入口32、可燃混合气出口34、设于油水分离器3内部的冷凝装置33以及设于油水分离器3底部的油水沉降室31，废气入口32位于油水沉降室31上方，油水沉降室31底部设有排污口311；废气入口32与通风口11之间设有通风波纹管12；曲轴箱废气依次经通风波纹管12、油水分离器3后获得可燃混合气体，可燃混合气体经空气滤芯21进入进气燃烧系统。
本实施例将曲轴箱废气通过通风波纹管12输送至油水分离器3的过程中，经过通风波纹管12的粘附和冷凝装置33冷凝后，滤除了废气中的水蒸气以及废机油蒸汽，冷凝后的水和废机油沿油水分离器3下流入油水沉降室31底部经排污口311排出，从而获得洁净的可燃混合气体。洁净的可燃混合气体通过空气滤芯21后经空气滤清器2的出气口22输送至进气燃烧系统中。经过本发明的废气处理后进入进气燃烧系统的可燃混合气体洁净、干燥，避免了废机油蒸气和水蒸气进入进气燃烧系统后附着于节气门5和进气歧管壁上形成粘膜，也就避免了含灰尘的空气粘结到粘膜上形成越来越厚的油泥的现象，同时也避免了废机油蒸汽经过高温的进气门13和燃烧室以及尾气净化系统时裂解形成坚硬的积碳，从而使发动机的进气燃烧系统和尾气净化系统长期保持干净，提高了进气压力传感器41和氧传感器的灵敏度，保证了燃烧室内燃料的正常燃烧，大大减小了因积炭的原因造成的发动机动力不足、油耗增加、尾气排放超标、维修保养成本增加的概率。
实施例2：为了保证进入进气歧管4的可燃混合气洁净、干燥，或是不被从空气入口23进入的含尘空气污染，在上述实施1的基础上增加技术特征：经过可燃混合气出口34的气体经空气滤芯21过滤后进入进气歧管4。进一步保证了进入进气燃烧系统中的可燃混合气体的洁净、干燥，从而使燃烧室内的燃料燃烧充分，发动机动力增强，并节省了燃料。
如果节气门处油泥形成后，由于节气门5的机械开关，便在节气门5的外缘形成了油泥台阶，当车辆低速行驶时，由于节气门5开度少，进气受油泥台阶的阻碍，使进气量与节气门5开度不相匹配，造成进气量不足， 而导致可燃混合气过浓，那么燃烧就会不充分，导致有害气体排放急剧增加、油耗增加、怠速不稳熄火等。由于曲轴箱废气中缺少氧气，废气中的机油燃烧的热量并不能被利用，还需耗氧，再加上废气中阻燃的水，反而影响了燃料的正常燃烧，所以将废气中的机油、水分排出，不但防止了积炭的形成，还使废气中的可燃混合气可充分燃烧，所以动力增加，节省燃料，本实施例恰能解决此问题。
实施例3：与上述实施例不同的是，本实施例中通风波纹管的长度范围为40-80cm；且通风波纹管12自通风口11延曲轴箱废气流出方向向上倾斜设置。废气在波纹管中流动的过程中，能够将分子较为稳定的机油气体附着于波纹管中成为机油液体，采用波纹管作为通风管增加了与废气接触的面积，而且废气在波纹管的流动中由于波纹管特定形状的作用，形成了很多空气旋窝，使得从废气分离出机油液体的效果很明显。为了使分离出的机油液体能够回流至曲轴箱中，本实施例限定了通风波纹管12自通风口11延曲轴箱废气流出方向向上倾斜设置，也就是使通风口11的位置稍低，再具体的实施方式中，大约有四分之三长度的波纹管高度高于通风口11，使大部分机油能够流回曲轴箱中，从而可减少机油的损耗。
本实施例限定了通风波纹管的长度在40cm-80cm，因为只有在40cm以上的通风波纹管分离机油的效果最佳，而40cm以下的通风波纹管由于与废气的接触面积较小，分离机油的效果不理想，特别是老车、欧美车系这些窜气较为严重的车型；经实验，新车时使用40cm-80cm的通风波纹管机油分离率是70％左右，老车或窜气严重的欧美车系分离率为50％左右，剩余的部分经油水分离器3后可基本分离干净，经油水沉降室31和排污口311排出或者收集到定量容器中按时倒掉，对大气和环境污染较小。
实施例4：所述油水分离器3设于空气滤清器底部，由于该部位的温度低，而本发明利用的油水分离的原理是废机油蒸汽、水蒸气和可燃混合气(主要成分HC)转变为液态所需要的温度不同，所以温差相对较大的部位，分离效果越好，这样还可以根据车辆排气量，适当减少冷凝装置的体积，所以将油水分离器设于空气滤清器底部既美观又节省成本，是本发明的又一个技术特征。
上述实施方式旨在举例说明本发明能够被本领域专业技术人员实现或使用，对上述实施方式进行常规修改对本领域技术人员来说将是显而易见的，故本发明包括但不限于上述实施方式，任何符合本申请文件的描述，符合与本文所公开的原理相同或相似的方法、工艺、产品，均落入本发明的保护范围之内。

Claims (4)

  1. 一种曲轴箱废气处理系统，其特征在于，包括曲轴箱气门室罩盖、设于所述曲轴箱气门室罩盖上的通风口、空气滤清器、设于所述空气滤清器内的空气滤芯以及设于空气滤清器底部的油水分离器；所述油水分离器包括废气入口、可燃混合气出口、设于所述油水分离器内部的冷凝装置以及设于所述油水分离器底部的油水沉降室，所述废气入口位于所述油水沉降室上方，所述油水沉降室底部设有排污口；所述废气入口与所述通风口之间设有通风波纹管；曲轴箱废气依次经所述通风波纹管、所述油水分离器后获得可燃混合气体，可燃混合气体经所述空气滤芯进入进气燃烧系统。
  2. 根据权利要求1所述的一种曲轴箱废气处理系统，其特征在于，所述通风波纹管的特征为波纹状，且长度范围为40-80cm。
  3. 根据权利要求1所述的一种曲轴箱废气处理系统，其特征在于，所述通风波纹管自所述通风口延曲轴箱废气流出方向向上倾斜设置。
  4. 根据权利要求1所述的一种曲轴箱废气处理系统，其特征在于，所述油水分离器设于空气滤清器底部。
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