Abstract: Methods and systems are provided for deactivating a valve actuation mechanism. In one example, a system may include a hydraulic gallery that may deliver a restricted flow of hydraulic fluid from a hydraulic flow restrictor to a pressure relief valve within a valve deactivation oil control valve, and during a second condition may deliver an unrestricted flow of hydraulic fluid from the valve deactivation oil control valve to the hydraulic flow restrictor. The hydraulic flow restrictor may comprise two vertical bores within the camshaft carrier that are fluidically coupled via a restrictive groove on the bottom surface of the camshaft carrier.

Abstract: Methods and systems are provided for deactivating a valve actuation mechanism. In one example, a system may include a hydraulic gallery that may deliver a restricted flow of hydraulic fluid from a hydraulic flow restrictor to a pressure relief valve within a valve deactivation oil control valve, and during a second condition may deliver an unrestricted flow of hydraulic fluid from the valve deactivation oil control valve to the hydraulic flow restrictor. The hydraulic flow restrictor may comprise two vertical bores within the camshaft carrier that are fluidically coupled via a restrictive groove on the bottom surface of the camshaft carrier.

Abstract: Methods and systems are provided for regulating oil flow to advance and retard chambers of a variable cam timing (VCT) system and to a thrust bearing of a camshaft via an oil control valve. In one example, an oil control valve may be housed within a cam journal cap the cam journal cap comprising a thrust bearing for receiving and retaining a camshaft. The cam journal cap may include a vertical bore configured to house the control valve, where the vertical bore may include a first port for receiving oil from an oil pump, a second port for flowing oil to an advance chamber of a VCT system, a third port for flowing oil to a retard chamber of the VCT system, a fourth port, coupled to the thrust bearing for flowing oil thereto, and a drain port for flowing oil to an oil sump.

Abstract: Methods and systems are provided for deactivating a valve actuation mechanism. In one example, a system may include a hydraulic gallery that may deliver a restricted flow of hydraulic fluid from a hydraulic flow restrictor to a pressure relief valve within a valve deactivation oil control valve, and during a second condition may deliver an unrestricted flow of hydraulic fluid from the valve deactivation oil control valve to the hydraulic flow restrictor. The hydraulic flow restrictor may comprise two vertical bores within the camshaft carrier that are fluidically coupled via a restrictive groove on the bottom surface of the camshaft carrier.

Abstract: Methods and systems are provided for regulating oil flow to advance and retard chambers of a variable cam timing (VCT) system and to a thrust bearing of a camshaft via an oil control valve. In one example, an oil control valve may be housed within a cam journal cap the cam journal cap comprising a thrust bearing for receiving and retaining a camshaft. The cam journal cap may include a vertical bore configured to house the control valve, where the vertical bore may include a first port for receiving oil from an oil pump, a second port for flowing oil to an advance chamber of a VCT system, a third port for flowing oil to a retard chamber of the VCT system, a fourth port, coupled to the thrust bearing for flowing oil thereto, and a drain port for flowing oil to an oil sump.

Abstract: Methods and systems are provided for deactivating a valve actuation mechanism. In one example, a system may include a hydraulic gallery that may deliver a restricted flow of hydraulic fluid from a hydraulic flow restrictor to a pressure relief valve within a valve deactivation oil control valve, and during a second condition may deliver an unrestricted flow of hydraulic fluid from the valve deactivation oil control valve to the hydraulic flow restrictor. The hydraulic flow restrictor may comprise two vertical bores within the camshaft carrier that are fluidically coupled via a restrictive groove on the bottom surface of the camshaft carrier.