Abstract:
A hydraulic tensioner with a sealing element to provide fluid leakage from a fluid filled chamber. The tensioner includes a housing having a fluid filled chamber and a hollow piston slidably received within the chamber and biased in a protruding direction by a spring. A sealing element is positioned in a groove in the piston or is mounted in the inner wall of the chamber. The sealing element is discontinuous so as to permit the passage of fluid from the fluid filled chamber to outside of the hydraulic tensioner. Fluid leakage is limited and controlled by discontinuity size of the sealing element.
Abstract:
The present invention is directed to a blade-type chain tensioner having two shoes and a blade spring, with one shoe adapted to impart tension to a chain and overlapping the other shoe which is connected to the blade spring. The present invention includes a method for assembling a dual blade chain tensioner comprising the steps of providing a blade spring and two shoes, positioning the blade spring into slots in each shoe and then rotating one shoe over the other shoe and towards the blade spring. A temporary locking pin may be attached to hold the assembly together.
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:
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 transmission for an engine or motor with a reduced package size and increased efficiency comprising: an input sprocket, an output sprocket, a chain, and a planetary gear set. The output sprocket is drivingly connecting to the input sprocket through the chain. The output sprocket has a hollow center portion that receives the sun gear of the planetary gear set. The planetary gear set also includes at least two planet gears meshed with the sun gear which are mounted to a fixed planet carrier for driving a differential with a ring gear portion. When the input sprocket is rotated in a first direction, the chain drives the output sprocket and the sun gear in the first direction, and the sun gear drives the planet gears to rotate in a second direction, opposite the first direction, driving the ring gear portion and differential in the second direction.
Abstract:
A sprocket unit comprising: a damper mounted on the first shaft with a first face defining a recess and a second face defining chambers for receiving spring loaded weights; a sprocket mounted to the first shaft with a hub defining an aperture and a slot; a front end plate mounted on the shaft with a hub defining an aperture aligned with the aperture of the sprocket; and a spring received within the aperture of the sprocket, the aperture of the front end plate, and the recess of the damper. When the first shaft rotates and firing frequency of the engine coincides with a resonant frequency of the first shaft, the spring loaded weights slide in the chambers of the damper, dampening out the resonant frequency in the first shaft and when the sprocket rotates the spring compresses and extends, reducing torsional load of the first shaft on the second shaft.
Abstract:
A variable camshaft timing phaser for an internal combustion engine having at least one camshaft comprising a plurality of vanes in chambers defined by a housing and a spool valve. The vanes define an advance and a retard chamber. At least one of the vanes is cam torque actuated (CTA) and at least one of the other vanes is oil pressure actuated (OPA). The spool valve is coupled to the advance and retard chamber defined by the CTA vane and the advance chamber defined by the OPA vane. When the phaser is in the advance position, fluid is routed from the retard chamber defined by the OPA vane to the retard chamber defined the CTA vane. When the phaser is in the retard position, fluid is routed from the retard chamber defined by the CTA vane to the advance chamber defined by the CTA vane.
Abstract:
A variable camshaft timing system for an internal combustion engine comprising a housing having an outer circumference for accepting drive force, a rotor for connection to a camshaft coaxially located within the housing capable of rotation to shift the relative angular position of the housing and the rotor, a locking pin, and a centrifugal valve. The locking pin is slidably located and radially moveable in a radial bore from a locked position in which the inner end fits into the recess defined by the housing, locking the relative angular position of the rotor and housing, to an unlocked position in which the inner end does not engage the receiving hole defined by the housing. The centrifugal valve is in fluid communication with an inlet line coupled directly to an engine oil supply controlling flow of oil to the locking pin.
Abstract:
In a variable cam timing (VCT) system that has a crank shaft coupled to at least one cam shaft. The system has at least one timing gear associated with the crank shaft or a cam shaft. The timing gear includes at least two groups of toothlike projections including a first group having a first distance to the center of the wheel, and a second group having a second distance to the center of the wheel. The first distance is different from the second distance. Whereby torsional energy for torque actuated purposes is increased for the VCT system. The system may further include a resonator which is positioned upon the at least one cam shaft, the resonator including at least one mass and at least one elastic element. Whereby torsional oscillation of the at least one cam shaft at a predetermined engine speed range is increased.
Abstract:
A hydraulic rack-style tensioner includes two concentric pistons in the bore of a tensioner housing. The lower piston which occupies a generally lower position in the housing has conventional ratchet teeth on an outside surface. The ratchet teeth form a rack which are engaged by a pawl. An upper piston occupies a generally upper protruding position in the housing. A chamber is defined between the upper piston and the housing, or between the upper piston and lower piston. Pressurized fluid in the chamber between the upper and lower pistons act to cushion impact of the rack and pawl mechanism when high loads from an associated tensioner arm and chain cause the upper and the lower pistons to be forced back toward the tensioner housing.