Delphi Technologies, Inc.

Delphi Technologies IP Limited

Thomas Howard Lichti

Thomas Huntington Fischer

Michael James Fox

Karl Jacob Haltiner, Jr

Jason M Urckfitz

Daniel Richard Cuatt

Cai P Shum

Mark James Spath

Dominic Borraccia

Wayne S Harris

Gary John Deangelis

Daniel Frederick Smith

Bruno Lequesne

Elias Taye

Timothy M Nieves

Matthew T Scott

Alan G Strandburg, Iii

Paul A Armour

Joseph D Cocca

Daniel Patrick O'Neill

Jeremy N Graves

Nathan B Owen

Dwight H Overmoyer

Jack E Gerke

Thomas H Fischer

Karl J Haltiner Jr

A camshaft phaser includes a stator having a plurality of lobes; a rotor coaxially disposed within the stator, the rotor having a plurality of vanes interspersed with the plurality of lobes defining a plurality of advance chambers and a plurality of retard chambers such that the plurality of advance chambers and the plurality of retard chambers are arranged in an alternating pattern and such that the rotor rotates within the stator from a full advance position to a full retard position; and a supply passage in continuous fluid communication with one of the plurality of advance chambers, the supply passage being in continuous fluid communication with an oil source.

Hydraulically biased camshaft phaser

A camshaft phaser includes a stator having a plurality of lobes and a rotor coaxially disposed within the stator and having a plurality of vanes interspersed with the lobes defining a plurality of alternating advance chambers and retard chambers such that a phasing valve supplies and vents oil to and from the advance and retard chambers. A first check valve allows oil to flow from only one of the retard chambers to only one of the advance chambers when a first diverter valve permits communication between the one of the advance chambers and the first check valve and a second check valve allows oil to flow from the one of the advance chambers to the one of the retard chambers when a second diverter valve permits communication between the one of the retard chambers and the second check valve.

Camshaft phaser

A camshaft phaser includes a stator; a rotor defining an advance chamber and a retard chamber with the stator; a valve spool that is rotatable about an axis and defining a supply chamber and a vent chamber with the rotor; an actuator which rotates the valve spool to change the position of the rotor relative to the stator by 1) supplying oil from the supply chamber to the advance chamber and venting oil from the retard chamber to the vent chamber and 2) supplying oil from the supply chamber to the retard chamber and venting oil from the advance chamber to the vent chamber; and a check valve which is displaceable axially between an open position which allows oil to flow from the vent chamber to the supply chamber and a closed position which prevents oil from flowing from the supply chamber to the vent chamber.

Camshaft phaser with a rotary valve spool

A camshaft phaser includes an input member; an output member defining an advance chamber and a retard chamber with the input member; a valve spool moveable between an advance position and a retard position and having a valve spool bore with a phasing volume and a venting volume defined therein such that the phasing volume is fluidly segregated from the venting volume; and a phasing check valve within the valve spool. The advance position allows oil to flow through the phasing check valve and through the phasing volume from the advance chamber to the retard chamber while preventing oil from flowing from the retard chamber to the advance chamber and the retard position allows oil to flow through the check valve and through the phasing volume from the retard chamber to the advance chamber while preventing oil from flowing from the advance chamber to the retard chamber.

A camshaft phaser includes an input member; an output member defining an advance chamber and a retard chamber with the input member; a valve spool moveable between an advance position and a retard position. The valve spool has a phasing volume and a venting volume defined therein such that the phasing volume is fluidly segregated from the venting volume. The valve spool also has a passage providing fluid communication between the phasing volume and the exterior of the valve spool. Oil is supplied to the advance chamber from the phasing volume through the passage in order to retard the timing of a camshaft and oil is supplied to the retard chamber from the phasing volume through the passage in order to advance the timing of the camshaft.

A camshaft phaser includes an input member; an output member defining an advance chamber and a retard chamber with the input member; a valve spool coaxially disposed within the output member such that the valve spool is rotatable relative to the output member and the input member, the valve spool defining a supply chamber and a vent chamber with the output member; an actuator which rotates the valve spool in order to change the position of the output member relative to the input member by supplying pressurized oil from the supply chamber to one of the advance chamber and the retard chamber and venting oil to the vent chamber from the other of the supply chamber and the advance chamber; and a check valve which allows oil to flow from the vent chamber to the supply chamber and prevents oil from flowing from the supply chamber to the vent chamber.

Camshaft phaser with position control valve

A camshaft phaser is provided for varying the phase relationship between a crankshaft and a camshaft in an engine. The camshaft phaser includes a stator having lobes. A rotor is disposed within the stator includes vanes interspersed with the stator lobes to define alternating advance and retard chambers. A lock pin is provided for selective engagement with a lock pin seat for preventing relative rotation between the rotor and the stator. Pressurized oil disengages the lock pin from the seat while oil is vented for engaging the lock pin with the seat. A phase relationship control valve is coaxial with the rotor and controls the flow of oil into and out of the chambers. A lock pin control valve is coaxial with the phase relationship control valve and controls the flow of oil to and from the lock pin. The control valves are operational independent of each other.

Camshaft phaser with coaxial control valves

A camshaft phaser for controllably varying the phase relationship between a crankshaft and a camshaft in an internal combustion engine includes stator having a plurality of lobes. A rotor is coaxially disposed within the stator and has a plurality of vanes interspersed with the lobes defining alternating advance chambers and retard chambers. A lock pin is disposed within the rotor for selective engagement with a lock pin seat for preventing a change in phase relationship between the rotor and the stator. A lock pin oil control valve is located within the camshaft phaser for 1) selectively receiving the pressurized oil from one of the advance chambers and directing the pressurized oil to the lock pin and 2) selectively receiving the pressurized oil from one of the retard chambers and directing the pressurized oil to the lock pin for disengaging the lock pin from the lock pin.

Camshaft phase

A camshaft phaser is provided for varying the phase relationship between a crankshaft and a camshaft in an engine. The camshaft phaser includes a stator having lobes. A rotor disposed within the stator and rotatable between a full retard position to a full retard position includes vanes interspersed with the stator lobes to define alternating advance and retard chambers. A lock pin selectively engages a lock pin seat for preventing a change in phase relationship between the rotor and the stator at a predetermined aligned position between the full advance and full retard positions. A counterbalancing member is located within one of the advance chambers or the retard chambers, attached to a vane to thereby apply a torque between the rotor and the stator only when the rotor is between the predetermined aligned position and one of the full retard position and the full advance position.

A camshaft phaser for controllably varying the phase relationship between a crankshaft and a camshaft in an internal combustion engine is attached to the camshaft with a camshaft phaser attachment bolt. The camshaft phaser attachment bolt includes a stepped bore for communicating pressurized oil from the internal combustion engine to a valve spool and is defined by a larger diameter bore, a smaller diameter bore, and a shoulder between the larger diameter bore and the smaller diameter bore. A check valve assembly includes a check valve body axially moveable within the larger diameter bore. The check valve body includes a plurality of azimuthally spaced guiding walls, a plurality of clearance walls separating the guiding walls, and a seating surface at one end of the guiding walls and the clearance walls for selectively seating with the shoulder to prevent fluid communication between the larger diameter bore and the smaller diameter bore.

Check valve for a camshaft phaser

A camshaft phaser is provided for varying the phase relationship between a crankshaft and a camshaft in an engine. The camshaft phaser includes a stator having lobes. A rotor disposed within the stator includes vanes interspersed with the stator lobes to define alternating advance and retard chambers. A lock pin is provided for selective engagement with a lock pin seat for preventing relative rotation between the rotor and stator. Pressurized oil disengages the lock pin from the seat while oil is vented for engaging the lock pin with the seat. A phase relationship control valve is located coaxially within the rotor to control the flow of oil into and out of the chambers. A lock pin oil passage communicates oil to and from the lock pin based on input from a lock pin control valve located outside of the camshaft phaser. The control valves are operational independent of each other.

Camshaft phaser with independent phasing and lock pin control

A camshaft phaser is provided for varying the phase relationship between a crankshaft and a camshaft in an internal combustion engine. The camshaft phaser includes a stator having a plurality of lobes. A rotor is disposed within the stator and includes a plurality of vanes interspersed with the stator lobes to define alternating advance and retard chambers. A bushing adaptor of the camshaft phaser is disposable axially within a pocket of the camshaft and is disposed axially within the rotor. The bushing adaptor defines at least in part a supply passage for communicating pressurized oil from the internal combustion engine to a control valve, an advance passage for selectively communicating pressurized oil from the control valve to the advance chambers, and a retard passage for selectively communicating pressurized oil from the control valve to the retard chambers.

Axially compact camshaft phaser

A helical phaser bias spring including at least one linear region and an adjacent region having a radius of curvature less than that of the helix. A channel in the phaser receives the linear region of the spring and adjacent region to lock the spring to the phaser at either the rotor or the stator. Preferably, the spring includes two linear regions separated by a bend of about 90&#xb0;. Additional linear regions are possible, separated by right and/or other angle bends. In a phaser rotor or stator, the geometric shape required to hold a spring end having a flat is easier to form with powdered metal tooling or diecasting than is a circular, radial, or axial shape for receiving a spring tang as in the prior art, the packaging volume required for the spring is smaller, and spring friction is lowered.

Cam phaser helical bias spring having a square end for retention

A torque bias coil spring for a camshaft phaser disposed in an annular well formed in the phaser rotor and having a central arbor for supporting the spring. The radius of the central arbor is such that the spring has radial operating clearance of 5-10%, as in the prior art. However, the improved arbor includes regions of higher radius at the arbor ends supporting the innermost and outermost coils of the spring. These regions serve to prevent the spring from being laterally displaced during torsional motion, thus minimizing the relative motion at the spring contact points, reducing stress on the spring, and improving the efficiency of the spring by reducing frictional hysteresis.

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Victor, NY, United States of America

Thomas Howard Lichti