论文部分内容阅读
美国GM公司的EMD为自己的柴油机开发了一种新型气缸盖。由于其结构的独突性,可延长气门座的寿命。这种新的气缸盖被命名为Diamond 6切向气流气缸盖(The Diamond 6Tangent Flow Cylinder Head)。它的内部结构经过改进设计,从而改善了冷却能力,减少了漏水。由于降低了沿火力面的温度梯度,使得气门座温度更加均匀,并且相对减少了热变形,因而相应提高了气门的寿命。耐久性试验表明,排出气门的密封有了明显的改进。Diamond 6型气缸盖的气门导管还进行了硬化处理,因而可延长寿命,加快大修时的进程。 GM-EMD还开发了一条新的带程控的铸造生产线,这条生产线使得Diamond 6气缸盖冷却通路的铸造质量大为提高。由于除去了桶形段面泥芯孔堵头,实际上消除了漏水现象。
EMD, a U.S. GM company, has developed a new cylinder head for its own diesel engine. Because of its unique structure, can extend the life of the valve seat. The new cylinder head is named the Diamond 6 Tangent Flow Cylinder Head. Its internal structure has been engineered to improve cooling capacity and reduce water leakage. As a result of reducing the temperature gradient along the thermal surface, making the valve seat temperature is more uniform, and the relative reduction of thermal deformation, thus corresponding to improve valve life. Durability tests show that there is a significant improvement in the sealing of the venting valve. The valve guides on the Diamond 6 cylinder head are also hardened to extend their life and speed up the overhaul process. GM-EMD has also developed a new process-controlled foundry line that significantly improves the quality of the castings on the Diamond 6 cylinder head cooling passages. Due to the removal of the barrel section of mud hole plug, in fact, to eliminate the leakage phenomenon.