摘要:
A hydraulic tensioner includes an inlet portion which defines a pressurized fluid inlet. The hydraulic tensioner also includes a housing defining a chamber which is coupled to the inlet portion. A band check valve separates the pressurized fluid inlet from the chamber, and a piston slideably engages the housing. A method of manufacturing the hydraulic tensioner is also disclosed.
摘要:
A camshaft assembly for an internal combustion engine has a hollow outer shaft with slots along its length and an inner shaft with holes along its length. The holes on the inner shaft are aligned with the slots on the outer shaft. A first set of cam lobes are fixed to the outer shaft and a second set of cam lobes are placed on the slots of outer shaft with a clearance fit. A means fixes the second set of cam lobes to the inner shaft, while simultaneously allowing the second set of cam lobes to be a clearance fit to the outer shaft. The means fixing the second set of cam lobes to the inner shaft may be a hollow pin which is hydroformed or a rivet insert which is expanded by insertion, pulling, and removal of a threaded rod.
摘要:
A closed loop chain tensioner system having a drive sprocket, one or more driven sprockets, a first mechanical tensioner located adjacent a slack strand and a second mechanical tensioner located adjacent a tight strand. Each tensioner is independently pivotally mounted to the engine block. The mounting point may be located at any point along the length of each tensioner. The tensioners are then linked to each other by a rigid, solid link. This solid link enables the tensioners to act in unison, thus providing damping across both strands of chain in response to engine torsional variations.
摘要:
A flexible coupling linkage (14) anchors a housing (16) that at least partially encloses a rotor (18) of an actuator (22) against rotation, while allowing free movement of the housing (16) in two other planes relative to the rotor (18) to match an angular rotational plane orientation of the rotor (18) to prevent binding between the housing (16) and the rotor (18) due to misalignment. The flexible coupling linkage (14) can be selected from a group of pivot joints (24a, 24b) including at least one of a pivot pin joint (30, 34), a ball-and-socket joint (32), and any combination thereof. The pivot joint (24) defines a restrained point (26a, 26b) associated with the housing (16) radially spaced from an axis of rotation of the rotor (18) preventing rotation of the housing (16) about the axis of rotation of the rotor (18), while allowing angular displacement of the housing (16) about the restrained point (26a, 26b) permitting the housing (16) to match an angle of the rotor (18) to prevent binding between the housing (16) and the rotor (18).
摘要:
A ratcheting tensioning device for a closed loop chain driven power transmission system of an internal combustion engine consisting of a base tensioner arm (12) and an adjusting tensioner arm (14) which each contact different strands or chain. Optionally, each arm may have a chain guide element for contacting the chain. The two tensioner arms (12, 14) are connected by a link plate (16) that is pivotally mounted to the base tensioner arm (12) in proximity to a first edge (24) of the link plate (16). A channel (52) located in proximity to a second edge (25) of the link plate (16) which allows a pin or sleeved bolt, to be securely attached to the adjusting tensioner arm (14), to traverse along the length of the channel (52) to urge the two tensioner arms (12, 14) toward each other in response to progressively increasing slack in the chain caused by the wearing over time of the components of the power transmission system.
摘要:
A tensioner for imparting tension to a chain having a body, a resilient chain guide element, at least one blade spring, and at least one bracket. The body of the tensioner has a surface with a profile of the path of a new chain and a groove found longitudinally along the length of the surface. The resilient chain guide element, on the surface of the body has a chain contact surface and two ends wrapped around the ends of the body, with the chain guide being sufficiently larger than the body, such that the chain contact surface is capable of being biased away from the body. The blade spring is present in the groove with its end in the containments means of the groove, biasing the chain guide out and away from the body. At least one bracket is fixedly attached to the body and has a pivot.
摘要:
A slack adjuster (500) is provided that is particularly advantageous for use in tensioning vehicular timing belts or chains. Adjuster (500) has substantially coaxially aligned status plunger (48), dynamic plunger (74), and sleeve (66). A first check valve (56) controls fluid flow between a first low pressure fluid reservoir or chamber (50) on plunger (48) and a second fluid chamber (84) in plunger (74). A second check valve (80) controls fluid flow between chamber (84) and a third fluid chamber in sleeve 66 includes a passageway (84) and also operates to prevent air from re-entering chamber (82) from passsageway (84).
摘要:
A torque pulsated variable cam timing camshaft arrangement for a reciprocating piston, internal combustion engine is provided. The arrangement includes a sprocket. A torque pulsated phaser unit is operatively associated with the sprocket. A camshaft is operatively associated with the sprocket and the camshaft torsionally powers the phaser unit. The camshaft has a cam lobe engaged with a first cam follower for controlling a position of a spring biased valve. A spring biased second cam follower is engaged with the cam lobe providing a torsional input to the camshaft.
摘要:
A camshaft assembly for an internal combustion engine comprising: a hollow outer shaft 2, an inner shaft 4, cam lobes 6, 8, a phaser 42, 32, and a remote control valve 16. The inner shaft 4 is received within the hollow outer shaft 2. The phaser 42, 32 is mounted to the inner and outer shafts 4, 2. The remote control valve 16 controls the flow of fluid to and from the phaser 42, 32 through a plurality of passages 22, 24, 26, 28 and the inner shaft 4.
摘要:
A ratcheting tensioning device for a closed loop chain driven power transmission system of an internal combustion engine consisting of a base tensioner arm (12) and an adjusting tensioner arm (14) which each contact different strands or chain. Optionally, each arm may have a chain guide element for contacting the chain. The two tensioner arms (12, 14) are connected by a link plate (16) that is pivotally mounted to the base tensioner arm (12) in proximity to a first edge (24) of the link plate (16). A channel (52) located in proximity to a second edge (25) of the link plate (16) which allows a pin or sleeved bolt, to be securely attached to the adjusting tensioner arm (14), to traverse along the length of the channel (52) to urge the two tensioner arms (12, 14) toward each other in response to progressively increasing slack in the chain caused by the wearing over time of the components of the power transmission system.