A LUBRICATION SYSTEM AND A METHOD FOR SUPPLYING A SUPPLEMENTED OIL FLOW TO A TURBOCHARGER

摘要

The invention relates to a lubrication control system, comprising an accumulator (56) having an oil reservoir (60) operable to receive oil from an engine oil pump (44) through an inlet line (58), to store oil therein at a first pressure greater than atmospheric pressure when said engine oil pump (44) is stopped, and to supply stored oil at said first pressure to a turbocharger (22) through an outlet line (62) upon shutdown or prior to startup of a turbocharged engine (12), wherein said outlet line (62) is separate from said inlet line (58); a control valve (74) disposed in said outlet line (62) between said oil reservoir (60) and said turbocharger and operable to selectively allow oil stored in said oil reservoir (60) to flow to said turbocharger (22) without flowing through said turbocharged engine (12); and at least one control module (32) that controls operation of a hybrid electric vehicle (11) having an electric machine (14) and said engine (12), said at least one control module (32) determining an operating condition of said engine (12) and commanding said control valve (74) to open and close based upon said operating condition of said turbocharged engine., wherein said operating condition is at least one of an engine shutdown, an impending engine shutdown, an impending engine startup, and an oil pressure produced by operation of an oil pump driven by operation of said engine (12).