Abstract:
A phaser for an internal combustion engine with at least one camshaft with a housing, a rotor, a control valve, and an accumulator. The housing has an outer circumference for accepting a drive force. The rotor is connected to the camshaft coaxially located within the housing, The housing and the rotor define a vane separating a chamber in the housing, the vane being capable of rotation to shift the relative angular position of the housing and the rotor. A control valve is received by the rotor for directing fluid to the chambers. The accumulator is located within a hollow of the camshaft adjacent to the control valve. When the relative angular position of the housing and the rotor shifts, fluid from the accumulator is provided to the chamber in the housing, preventing fluid pressure within the chambers from dropping to a low level and creating a vacuum within the chambers.
Abstract:
An internal combustion engine in which the variable cam timing controls for a variable cam timing mechanism include a variable force solenoid mounted within a hollow portion of the camshaft. The variable force solenoid is maintained in place within the hollow camshaft by a tubular shaft fixed to the engine and a bearing between the solenoid and the variable cam timing mechanism.
Abstract:
The check valve includes an integral filter screen. The check valve is preferably an inlet check valve mounted in the camshaft or cam phaser for cam torque actuated variable cam timing. The inlet check valve may also be used for torsion assist or oil pressure actuation. The screen-mounting feature preferably holds the check valve and prevents unfiltered oil from going into the check valve or the phaser. The integrated check valve may also be mounted in the head of the oil feed line to the camshaft, in the end of the cam, in the rotor, or in any place that feeds oil to the cam phaser.
Abstract:
A control system for an adjustment device for a variable compression ratio engine comprising: a jack head, a jack piston, a sprocket wheel, a movable transmission member, and a control valve. The jack piston is received within a chamber of the jack head defining first and second fluid chambers. The control valve controls the flow of fluid between the first and second fluid chambers. Based on the position of the control valve, fluid flows from the first fluid chamber to the second fluid chamber or vice versa, moving the control rack connecting the jack piston to the sprocket wheel. Reciprocating motion of the sprocket wheel adjusts the position of the cylinder of the engine.
Abstract:
A pump in which torsional energy from a shaft is converted to high pressure, actuating the pump. A ring (16) surrounds and is fixedly attached to a housing (1). The rotor (3) connects to a shaft (22) coaxially located within the housing. The housing and the rotor define at least one vane (6) separating a chamber in the housing into an advance (2) and a retard chamber (4). A first return spring (18) is received between the housing and the vane in the advance chamber and a second return spring (17) is received between the housing and the vane in the retard chamber. Inlet passages (19; 20) are present between a supply and the advance chamber and the retard chamber. Each of the passages have at least one inlet check valve (14; 15). Outlet passages (12;13) are present between the advance chamber and an output and the retard chamber and an output. Each of the passages has at least one outlet check valve (5; 7).
Abstract:
A system that provides adjustable actuation timing of one or more valve(s) (16) in a piston engine includes a position sensor (12) and a variable valve actuation assembly (10). The valve(s) (16) can be intake and/or exhaust valves in an internal combustion engine of an automobile. The position sensor (12) takes position readings of the valve(s) (16) as the valve(s) (16) actuate in the piston engine. The variable valve actuation assembly (10) controls actuation timing of the valve(s) (16). Actuation timing of the valve(s) (16) is adjustable based, in part or more, upon one or more position reading(s) of the position sensor (12). The variable valve actuation assembly (10) can be a lost motion assembly (10).
Abstract:
[0058] A coupling assembly (20, 120, 220) and method can include a first rotatable member (22, 122, 222) and a second rotatable member (26, 126, 226) defining a cylindrical hub portion having a plurality of springs (42, 142, 242) interposed between the cylindrical hub portion of the second rotatable member (26, 126, 226) and the first rotatable member (22, 122, 222) for transferring rotational torque between the first and second rotatable members. A plurality of load-bearing surfaces (32, 132, 232) associated with the first rotatable member (22, 122, 222) are engageable by the plurality of springs (42, 142, 242) to accommodate radial clearances (34, 36, 134, 136, 234) between the first rotatable member (22, 122, 222) and the cylindrical hub portion while providing rotational drive torque from the first rotatable member (22, 122, 222) to the second rotatable member (22, 122, 222) through the plurality of springs (42, 142, 242).
Abstract:
A phaser for an engine having at least one camshaft comprising a housing, a rotor, a control valve, an actuator, and a pulse wheel. The rotor connects to a camshaft coaxially located within the housing. The housing and the rotor define at least one vane separating a chamber in the housing. The vane is capable of rotation to shift the relative angular position of the housing and the rotor. The control valve is received by the rotor and directs fluid to the chambers of the phaser. The actuator positions the control valve and has at least one integrated position sensor, such that electrical connections for the actuator and the integrated position sensor are made through one connection, decreasing leakage of fluid from the phaser. A pulse wheel is mounted on the phaser for rotation therewith and in alignment with the integrated position sensor of the actuator.