Patent ID: 8813702
Filing Date: 2014-08-26
Classification: F01L,F02D,Y02T

Abstract:
1. A valve timing control device, comprising: a drive side rotating member which rotates in synchronization with a crankshaft of an internal combustion engine; a driven side rotating member, disposed coaxially with the drive side rotating member, which rotates integrally with a valve opening/closing camshaft of the internal combustion engine; fluid pressure chambers formed by the drive side rotating member and the driven side rotating member; partition portions each provided in one of the drive side rotating member or the driven side rotating member so as to partition each respective fluid pressure chamber into an advanced angle chamber and a retarded angle chamber; advanced angle control oil passages which supply hydraulic oil to the respective advanced angle chambers in order to shift a relative rotation phase of the drive side rotating member and the driven side rotating member in an advanced angle direction; retarded angle control oil passages which supply hydraulic oil to the respective retarded angle chambers in order to shift the relative rotation phase in a retarded angle direction; an intermediate lock mechanism which constrains the relative rotation phase to an intermediate lock phase in which the relative rotation phase is a predetermined phase between a most advanced angle at the advanced angle direction operation end and a most retarded angle at the retarded angle direction operation end; and a retarded angle lock mechanism which constrains the relative rotation phase to a retarded angle lock phase in which the relative rotation phase is a phase on a retarded angle side of the intermediate lock phase, wherein the intermediate lock mechanism is configured to include a single intermediate lock member provided so as to be advanceable and withdrawable from one of the drive side rotating member or the driven side rotating member toward the other, a biasing mechanism which biases the intermediate lock member so as to cause the intermediate lock member to protrude, and an intermediate fitting depression portion formed in the other one of the drive side rotating member or the driven side rotating member so that the intermediate lock member fits therein, and the retarded angle lock mechanism is configured to include a single retarded angle lock member provided so as to be advanceable and withdrawable from one of the drive side rotating member or the driven side rotating member toward the other, a biasing mechanism which biases the retarded angle lock member so as to cause the retarded angle lock member to protrude, and a retarded angle fitting depression portion formed in the other one of the drive side rotating member or the driven side rotating member so that the retarded angle lock member fits therein.