Patent ID: 9032728
Filing Date: 2015-05-19
Classification: F01M,F02B

Abstract:
1. A supercharger lubricating structure for an internal combustion engine, wherein a supercharger includes a rotating shaft connected to a crankshaft via a joint, an eccentric shaft portion provided on the rotating shaft, a movable scroll provided on the eccentric shaft portion so as to be orbited via a scroll bearing, and a fixed scroll provided to correspond to the movable scroll, wherein the movable scroll and the fixed scroll are configured to supply compressed air to an intake port of the internal combustion engine, the supercharger lubricating structure for an internal combustion engine comprising: an intra-crankshaft oil-feed passage disposed in the crankshaft; a support bearing provided on the fixed scroll so as to support the rotating shaft; an intra-rotating-shaft oil-feed passage disposed in the rotating shaft; a bearing oil-feed passage configured to bring the intra-rotating-shaft oil-feed passage, the support bearing, and the scroll bearing into fluid flow communication with one another; an extra-connection-pipe oil-feed passage disposed between the connection pipe and the intra-rotating-shaft oil-feed passage to allow a downstream side of the extra-connection-pipe oil-feed passage to fluid flow communicate with a lubricating oil return passage; and a connection pipe disposed inside the crankshaft and the rotating shaft, wherein the intra-crankshaft oil-feed passage is fluid flow communication-connected to the intra-rotating-shaft oil-feed passage via an intra-connection-pipe oil-feed passage disposed inside the connection pipe, and wherein the extra-connection-pipe oil-feed passage and the intra-rotating-shaft oil-feed passage are coaxial.