4 results about "Overhead valve" patented technology

An overhead valve (OHV) internal combustion engine includes an engine block. Cylinder heads are mounted on the engine block. Intake and exhaust ports connect to intake and exhaust manifolds. Intake pushrod assemblies engage intake valve rocker arms and valve lifters. Exhaust pushrod assemblies engage exhaust valve rocker arms and exhaust valve lifters. One of the intake and exhaust pushrod assemblies is a jointed pushrod assembly. The jointed pushrod assembly includes an upper pushrod segment that engages one of the intake and exhaust valve rocker arms. A lower pushrod segment engages one of the respective intake and exhaust valve lifters. Complementary joint members pivotally engage each other and can include an angle of less than 180 degrees. At least one pushrod guide assembly is mounted on one of the engine block and each head, and defines at least one passage that guides the complementary joint members.

The utility model provides an engine guiding scavenging valve mechanism which solves the problem that a traditional overhead valve type engine valve mechanism is difficult to efficiently sweep waste gas in a two-stroke working mode. According to the technical scheme, the air inlet valve air distribution assembly of the engine guiding scavenging air distribution machine comprises an air inlet valve rod arranged in an air inlet channel, the rear portion of the air inlet valve rod is connected with an air inlet valve cam and an air inlet valve spring pushing air inlet valve opening and closing air inlet, and an air guide pipe moving along with the air inlet valve rod is arranged between the air inlet valve rod and the air inlet valve head through a support. A front-end air outlet is reserved between the front end of the air guide pipe and the head of the air inlet valve, and a rear port of the air guide pipe is communicated with the air inlet channel. Waste gas is exhausted by guiding and scavenging the inlet gas, the two-stroke-type engine exhaust pipe can be suitable for a two-stroke-type working engine, the combustion efficiency and the emission performance are improved by guiding and scavenging the inlet gas, the scavenging efficiency is greatly improved, and then the working efficiency of the engine is improved.

The utility model discloses a photovoltaic damper with a sealing structure in the field of photovoltaic dampers, which comprises an oil storage cylinder pipe, a working cylinder, a piston rod, a guide sleeve and a top valve, at least one outer oil seal ring is assembled outside the guide sleeve, a piston rod oil seal ring and a first Y-shaped oil seal ring are assembled inside the guide sleeve, an inner oil seal ring is assembled outside the top valve, and a second Y-shaped oil seal ring is assembled inside the inner oil seal ring. A step seal sealing ring and a second Y-shaped oil seal ring are assembled in the overhead valve, a traditional rotary oil seal is replaced with the combination of the step seal sealing ring and the second Y-shaped oil seal ring, the photovoltaic damper can bear the working pressure of 40 Mpa or above, the overhead valve adopts an aluminum part and is additionally provided with an oil drainage groove, leaked oil liquid is discharged to an outer cavity through the oil drainage groove, and therefore the photovoltaic damper can bear the working pressure of 40 Mpa or above. And the damping oil in the inner cavity is discharged to the outer cavity through the damping hole, and the flow velocity of the oil is limited to generate damping force, so that the problem of oil leakage of a traditional photovoltaic damper is solved, and the service life of the photovoltaic damper is prolonged.

The present invention provides a valve train mechanism for an overhead valve-type engine provided with a highly versatile adjusting mechanism. Provided is the valve train mechanism (1) for an overhead valve-type engine, the valve train mechanism comprising: a push rod (4) that moves vertically with the rotation of a cam (2); a rocker arm (3) that is rotatably supported by being inserted into a shaft (3b), the rocker arm (3) being configured such that the vertical movement of the push rod (4) is transmitted to one end (3d) and the rocker arm (3) reciprocally oscillates to open and close an engine valve (5) at the other end (3a); a lash adjuster (10) that is swingably supported on a recess (3e) provided at the one end (3d) of the rocker arm (3) and transmits the vertical motion of the push rod (4) to the one end (3d) of the rocker arm; and an adapter (30) that is attached to the lash adjuster (10) and is interposed between the lash adjuster (10) and the push rod (4), wherein the adapter (30) is attached to and integrated with a sliding part (14) of the lash adjuster (10) at an upper part, and is supported at a lower part (31) by an upper end part (31) of the push rod, and the lash adjuster (10) transmits the vertical motion of the push rod (4) to the rocker arm (3) via an adapter (30) and adjusts the valve clearance.