Patent ID: 7891346
Filing Date: 2011-02-22
Classification: F02B,F02M,Y02T

Abstract:
1. A blowby gas returning device including, a returning passage and a PCV valve placed in the returning passage, the device being arranged to allow blowby gas leaking from a combustion chamber of an engine to flow in an intake passage through the returning passage and to return to the combustion chamber, and arranged to regulate a flow rate of the blowby gas by the PCV valve, the blowby gas returning device comprising: an outside-air passage for mixing outside air with the blowby gas before entering the PCV valve; an open-close valve for opening and closing the outside-air passage; an operating state detection device for detecting an operating state of the engine; and a valve control device for controlling the open-close valve based on the detected operating state, wherein the valve control device opens the open-close valve when the detected operating state is an idle state.