Reliable Processes of Simulating Liner Roughness and Its Lubrication Properties 2019-01-0178
Topology of liner finish is critical to the performance of internal combustion engines. Proper liner finish simulation processes lead to efficient engine design and research. Fourier methods have been well studied to numerically generate liner topology. However, four major issues wait to be addressed to make the generation processes feasible and reliable. First, in order to simulate real plateau honed liners, approaches should be developed to calculate accurate liner geometric parameters. These parameters are served as the input of the generation algorithm. Material ratio curve, the common geometry calculation method, should be modified so that accurate root mean square of plateau height distribution could be obtained. Second, the set of geometric parameters used in generating liner finish (ISO 13565-2) is different compared with the set of parameters used in manufacturing industry (ISO 13565-3). Quantitative relations between these two sets should be studied. Third, numerically generated liners should be run in deterministic lubrication, dry contact, and engine cycle models. Their output should be compared with corresponding real liners. Last but not least, currently most liner generation processes focus on plateau-honed liners, in order to prove the extensibility of the algorithm, other types of liners (e.g. thermal sprayed liner) should also be tested. In this article, efforts were made to fill all these four gaps. Reliable liner topology generation processes have been achieved.