液体燃料中における鋼球と平板の衝撃試験 : 第1報, 衝撃試験装置の試作とメタノールおよびガソリン中での摩耗試験

抄録

Alcohol is considered one of the effective alternative fuels, with the intention of reducing air pollution and ensuring a stable energy supply. It is known that valve surfaces in fuel injectors are worn for methanol fueled engines. It is important to make the wear mechanism clear in methanol for the practical use of methanol fuel vehicles. In this study, to simulate the wear phenomena on injector valves, a steel bearing ball was collided repeatedly with a flat hard plate in some liquid fuels. Electric resistance between the ball and the plate, which is corresponded to metallic contact rate, and collision load were measured. Undergoing the impact, squeeze film was formed, and whose characteristic was investgated by examining the relation between the collision load and the metallic contact rate. It revealed that the viscocity of methanol is so low under the high pressure that the squeeze film breakes down easily and the wear of materials are remarkable in methanol.