Abstract: Methods and systems are provided for a phase control apparatus in a variable cam timing (VCT) system of an engine, the phase control apparatus having a locking pin coupled to a rotor vane and engageable with a locking pin recess in the phase control apparatus cover plate. In one example, a method for assembling the phase control apparatus may include positioning respective retarded side surfaces of the rotor vane and the housing in face-sharing contact while positioning respective retarded side surfaces of the locking pin and the locking pin recess in face-sharing contact and maintaining a backlash gap between only the advanced side surfaces of the locking pin recess.

Abstract: A method may include restricting cam movement while the vehicle is moving in response to an oil pressure below a threshold oil pressure, and an engine speed below a threshold engine speed, and during a vehicle stopped condition, overriding the restricted cam movement. In one example, the vehicle stopped condition may include the oil over-temperature and the load above the threshold load.

Abstract: Methods and systems are provided for adjusting an oil pressure supplied to an engine and a variable cam timing (VCT) responsive to a condition of the VCT system. In one example, a method may include adjusting the oil pressure based on engine speed, engine load, and engine oil temperature, and responsive to a request to shift the VCT system during specific engine operating conditions, increasing the oil pressure to an upper threshold oil pressure for the duration of the shift.

Abstract: Methods and systems are provided for adjusting an oil pressure supplied to an engine and a variable cam timing (VCT) responsive to a condition of the VCT system. In one example, a method may include adjusting the oil pressure based on engine speed, engine load, and engine oil temperature, and responsive to a request to shift the VCT system during specific engine operating conditions, increasing the oil pressure to an upper threshold oil pressure for the duration of the shift.

Abstract: Methods and systems are provided for a phase control apparatus in a variable cam timing (VCT) system of an engine, the phase control apparatus having a locking pin coupled to a rotor vane and engageable with a locking pin recess in the phase control apparatus cover plate. In one example, a method for assembling the phase control apparatus may include positioning respective retarded side surfaces of the rotor vane and the housing in face-sharing contact while positioning respective retarded side surfaces of the locking pin and the locking pin recess in face-sharing contact and maintaining a backlash gap between only the advanced side surfaces of the locking pin the locking pin recess.

Abstract: Methods and systems are described for an engine with a cam torque actuated variable cam timing phaser. Phaser positioning control is improved by reducing inaccuracies resulting from inadvertent spool valve and/or phaser movement when the spool valve is commanded between regions. In addition, improved spool valve mapping is used to render phaser commands more consistent and robust.

Abstract: Methods and systems are described for an engine with a cam torque actuated variable cam timing phaser. Phaser positioning control is improved by reducing inaccuracies resulting from inadvertent spool valve and/or phaser movement when the spool valve is commanded between regions. In addition, improved spool valve mapping is used to render phaser commands more consistent and robust.

Abstract: A phase control apparatus in a variable cam timing (VCT) system of an engine is described herein. The phase control apparatus includes a locking pin coupled to a vane, the locking pin extending into a locking pin recess in a cover plate in a locked configuration, the locking pin and locking pin recess having a backlash and a housing at least partially enclosing the vane and spaced away from the vane forming a gap in the locked configuration.

Abstract: Various embodiments of systems and methods related to controlling oil injection for piston cooling in an engine are disclosed. In one embodiment, a method includes during an engine cold start event, enabling oil injection onto a piston of an engine, disabling oil injection after the engine cold start event, and re-enabling oil injection after the engine cold start event based on a first operating parameter.

Abstract: Methods and systems are described for an engine with a cam torque actuated variable cam timing phaser. Phaser positioning control is improved by reducing inaccuracies resulting from inadvertent spool valve and/or phaser movement when the spool valve is commanded between regions. In addition, improved spool valve mapping is used to render phaser commands more consistent and robust.

Abstract: Methods and systems are described for an engine with a cam torque actuated variable cam timing phaser. Phaser positioning control is improved by reducing inaccuracies resulting from inadvertent spool valve and/or phaser movement when the spool valve is commanded between regions. In addition, improved spool valve mapping is used to render phaser commands more consistent and robust.

Abstract: Methods and systems are described for an engine with a cam torque actuated variable cam timing phaser. Phaser positioning control is improved by reducing inaccuracies resulting from inadvertent spool valve and/or phaser movement when the spool valve is commanded between regions. In addition, improved spool valve mapping is used to render phaser commands more consistent and robust.

Abstract: Methods and systems are described for an engine with a cam torque actuated variable cam timing phaser. Phaser positioning control is improved by reducing inaccuracies resulting from inadvertent spool valve and/or phaser movement when the spool valve is commanded between regions. In addition, improved spool valve mapping is used to render phaser commands more consistent and robust.

Abstract: An engine system is provided. The engine system includes a drive component coupled to a first end of a camshaft and mechanically coupled to a crankshaft and a cam phaser coupled to a second end of the camshaft and mechanically coupled to and spaced away from the drive component, the cam phaser configured to alter the timing of the camshaft.

Abstract: Various embodiments of systems and methods related to controlling oil injection for piston cooling in an engine are disclosed. In one embodiment, a method includes during an engine cold start event, enabling oil injection onto a piston of an engine, disabling oil injection after the engine cold start event, and re-enabling oil injection after the engine cold start event based on a first operating parameter.

Abstract: A phase control apparatus in a variable cam timing (VCT) system of an engine is described herein. The phase control apparatus includes a locking pin coupled to a vane, the locking pin extending into a locking pin recess in a cover plate in a locked configuration, the locking pin and locking pin recess having a backlash and a housing at least partially enclosing the vane and spaced away from the vane forming a gap in the locked configuration.

Abstract: A phase control apparatus in a variable cam timing (VCT) system of an engine is described herein. The phase control apparatus includes a locking pin coupled to a vane, the locking pin extending into a locking pin recess in a cover plate in a locked configuration, the locking pin and locking pin recess having a backlash and a housing at least partially enclosing the vane and spaced away from the vane forming a gap in the locked configuration.

Abstract: Various embodiments of systems and methods related to controlling oil injection for piston cooling in an engine are disclosed. In one embodiment, a method includes during an engine cold start event, enabling oil injection onto a piston of an engine, disabling oil injection after the engine cold start event, and re-enabling oil injection after the engine cold start event based on a first operating parameter.

Abstract: A method comprises in response to an oil pressure below a threshold oil pressure, and an engine speed below a threshold engine speed, restricting cam movement while the vehicle is moving, and during a vehicle stopped condition, overriding the restricted cam movement.

Abstract: A method for operation of an engine is provided. The method includes operating an engine with independent variable intake and exhaust valve timing with an intake valve timing actuator and an exhaust valve timing actuator, locking both the intake and exhaust valve timing actuators in a mid-lock position, and unlocking both the intake and exhaust valve timing actuators via a common locking-control valve.