国外高压共轨喷油器电磁阀结构分析

Structure Analysis of Overseas-Brand Solenoid Valves Used on High Pressure Common Rail Injectors

从结构和材料两方面分析了博世公司和电装公司的共轨喷油器电磁阀。分析表明:两家公司的技术路线完全不同。博世公司采用球阀密封,衔铁和衔铁杆分离;铁芯和衔铁材料为合金结构钢;衔铁采用渗碳淬火处理。电装公司采用平面阀密封,预紧力较小;铁芯材料为粉末冶金;衔铁工艺复杂,吸合面为软磁性能较好的粉末冶金材料,撞击面为硬度较高的高速钢,两者通过烧结工艺结合成整体。相比之下,电装电磁阀结构更复杂,密封性能优于博世电磁阀,适用于超高压共轨喷油器。

The solenoid valves used on high pressure common rail injectors from BOSCH and DENSON are analyzed from the aspects of structure and material.The analysis shows that the two companies have two totally different technologies.BOSCH uses ball valves for sealing,and the armature and pole are divided.The material of the iron core and armature is alloy structural steel,and carburizing and quenching are applied on the the armature.DENSON uses plane valve for sealing,preload is small.The material of the iron core is powder metallurgy.The processing of the armature is complex.The pulling part of the armature is made of powder metallurgy with good soft magnetic property and the impact part of the armature is made of high speed steel with high hardness,the two parts are connected by sintering process;The DENSON solenoid has a more complex structure and better sealing performance compared to BOSCH solenoid,thus is more applicable for high pressure common rail injectors.