The purpose of the utility model is to provide an anti disassembly structure of the PCV valve which can ensure that the PCV valve can not be disassembled after being assembled to the valve cover, including the valve cover, the PCV valve is installed in the installation hole on the valve cover, the orifice of the installation hole is provided with a valve cover, and the valve cover outside the installation hole is provided with a shroud. After the assembly of the valve cover, due to the setting of the shroud, the disassembly tool can not reach the connection between the valve cover and the installation hole, and can only be removed after the shroud (valve cover) is damaged, meeting the requirement that the connection between the disconnected valve and the crankcase is obviously more difficult than that between the PCV valve and the intake manifold. The structure only involves small changes of the valve cover mould, which has the advantages of low cost, simple process and little influence on the related parts.
【技术实现步骤摘要】
PCV阀的防拆卸结构
本技术涉及汽车发动机
,具体涉及一种PCV阀的防拆卸结构。
技术介绍
活塞式内燃机工作时,由于活塞环与缸筒之间存在一定的间隙,缸内气体会窜入曲轴箱内,然而窜气中含有未经燃烧的碳化氢(HC)、一氧化碳(CO)等是造成大气污染的主要物质,因此,不能将窜气排放到大气中,而是普遍采用使其返回进气系统并与混合气体一起再燃烧的PCV(positivecrankcaseventilation曲轴箱强制通风)系统。但是,若返回进气系统的窜气量增加,会降低发动机能,因此,需要设置有用于调整窜气流量的PCV阀。如图1、图2所示,传统的PCV阀一般集成在气门室罩盖或油气分离模块1上,PCV阀通常由膜片、支架、弹簧、阀盖2等零件组成,通过卡扣结构,阀盖2可将膜片、支架、弹簧安装在气门室罩盖1上,当膜片破裂或弹簧卡滞时,可以使用起子等通用工具将阀盖2撬开,进行维修或更换。但是这种结构已经不能适应法规要求,该法规提出了新的要求:GB18352.6-2016—J.4.9规定:PCV阀与曲轴箱的连接关系满足下列条件:I) ...
【技术保护点】
1.一种PCV阀的防拆卸结构,包括气门室罩盖(10),PCV阀安装于气门室罩盖(10)上的安装孔内,安装孔的孔口处盖设有阀盖(20),其特征在于:安装孔外部的气门室罩盖(10)上设置有围挡(30)。/n
【技术特征摘要】
1.一种PCV阀的防拆卸结构,包括气门室罩盖(10),PCV阀安装于气门室罩盖(10)上的安装孔内,安装孔的孔口处盖设有阀盖(20),其特征在于:安装孔外部的气门室罩盖(10)上设置有围挡(30)。
2.根据权利要求1所述的PCV阀的防拆卸结构,其特征在于:围挡(30)为在圆周方向连续布置的挡板,挡板的板面垂直于气门室罩盖(10)的板面布置。
3.根据权利要求1所述的PCV阀的防拆卸结构,其特征在于:...
【专利技术属性】
技术研发人员:田身军,李德银,项大伟,朱斌,慕金华,
申请(专利权)人:奇瑞汽车股份有限公司,
类型:新型
国别省市:安徽;34
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