Concept of a new decoupled cylinder liner design for internal combustion (IC) engines is presented from the framework of axiomatic design to improve friction and wear characteristics. In the current design, the piston rings fail to satisfy their functional requirements at the two dead centers of the piston stroke where lubrication is poor. It is proposed that by using undulated cylindrical surfaces selectively along the cylinder liner, much of the existing friction and wear problems of IC engines may be solved. The main idea behind undulated surface is trap wear particles at the piston-cylinder interface in order to minimize plowing, and thus maintain low friction even in areas where lubrication fails to be hydrodynamic. In dry sliding tests using a modified engine motored at low speeds, undulated cylinders operated for significantly longer time than smooth cylinders without catastrophic increase in friction.
|Number of pages||9|
|Publication status||Published - 1991 Dec 1|
|Event||1991 Small Engine Technology Conference Proceedings - Tokyo, Jpn|
Duration: 1991 Oct 1 → 1991 Oct 1
|Other||1991 Small Engine Technology Conference Proceedings|
|Period||91/10/1 → 91/10/1|
All Science Journal Classification (ASJC) codes