摘要:
Hydraulic engine valve lifter includes a pair of pistons defining a pressure chamber therebetween and a separate lash adjusting piston which defines a lash adjustment chamber with one of the pistons in the pair. One-way valve structures permit fluid to flow from the pressure chamber into the lash adjustment chamber thereby displacing the lash adjusting piston to, in turn, adjust valve lash. Motion damping functions during a downstroke of the lifter pistons are also provided by a valve damper chamber and fluid passageways between the pressure and damper chambers. Structure is provided which opens communication between the pressure and damper chambers during upstroke of the lifter pistons (thereby precluding motion damping) and then closes communication at a predetermined location during downstroke (thereby providing motion damping).
摘要:
A fuel-exchange poppet valve of a reciprocating internal-combustion engine is actuated by two electromagnets that, in an alternating way, are energized periodically to attract an armature disk arranged between them. The armature disk is fastened at an armature that is coupled to a one-armed fuel-exchange poppet valve control lever. The control lever is pivotally moved back and forth against the spring tension of a torsional bar spring to open and close a poppet valve.
摘要:
A rocker arm has the valve actuator arm portion thereof provided with a bore and a slot or aperture so as to receive in operative unit assembly therewith a hydraulic lash adjuster that includes a closed end follower having an actuator depending from its closed end which is in the form of a semi-sphere or semi-spheroid which operatively engages into a socket on one side of a load/motion control button, the opposite side of the load/motion control button having a flat surface for abutment against the stem of a valve loosely extending through the slot or aperture so as to be engaged by the load/motion control button.
摘要:
A supporting structure for rocker arms for engine valves includes an engine having a cylinder head, a valve provided on the cylinder head and adapted for either of intake and exhaust purposes, a valve-operating mechanism for operating the valve, the valve-operating mechanism including a rocker arm abutting on the top of the valve, to thereby operate the valve, and a pivotal structure for pivotably supporting one end of the rocker arm. The pivotal structure comprises a ball-like portion, a spherical concave portion shaped in a form substantially correspondent to the ball-like portion and engaged with the ball-like portion, and an elastic member disposed at an aperture end of the spherical concave portion and adapted to hold the ball-like portion in the spherical concave portion.
摘要:
An arrangement for an electromagnetically operated actuator for a displacement-type engine having a spring-mass valve actuating oscillatory system which includes a valve having an armature thereon and a pair of electromagnets for maintaining the valve in at least first and second final operational positions of the maximum amplitude of vibration, the armature and at least one of the electromagnets comprising a contact dampener for the armature, at least one of the electromagnets being mounted in the housing by a hydraulic length-compensating element such that the distance between the valve seat and the pole area of the electromagnet is adjusted to correspond to the distance between the valve head and the pole area of the armature, so that the desired amount of dampening is consistently effected as the armature approaches the electromagnet and the valve approaches its seat.
摘要:
The invention provides an inexpensive and simple mechanical spring system which automatically compensates for variations in the clearance gap in the valve-actuating mechanism of internal combustion engines, whereby considerably to lengthen the time an engine can be in operation before manual adjustment of the clearance gap becomes necessary. The system comprises at least one thin metal disc located between a convex surface in contact with the center of one face of the disc and an annular surface in contact with the periphery of the other face of the disc, movement of the surfaces together deforming the disc around the convex surface to produce a spring force which increases at a variable rate until it exceeds the valve spring loading and the valve opens. The mechanism is initially adjusted so that the spring deflection is approximately one half the deflection required to overcome the valve spring loading.
摘要:
A reciprocating piston internal combustion engine is provided and includes poppet-type intake and exhaust valves. The valves are spring-biased under light spring pressure toward their closed positions and opposed electromagnets are operatively associated with each valve for shifting the latter between the open and closed limit positions thereof. Further, hydraulic dampening structure is provided for rapidly retarding the speed of movement of the valves as they approach their limit positions of movement. In this manner, there is a cushioning action on the valves and their seats as well as a substantial reduction in the tendency of the valves to operate in an erratic manner when the engine is operating under high speed conditions.
摘要:
A valve chock dampener for installation at one end of a rocker arm in a linkage for controlling opening and closing of a valve in an internal combustion engine. The dampener includes a housing formed with an open ended piston-receiving chamber and a piston is slidably received in such chamber and is formed with a head end for engaging an adjacent control member for controlling the valve.