33results about How to "Reduce reciprocating inertia force" patented technology

The invention discloses a motorcycle engine, wherein the outerwall of a cylinder end cover is provided with a wavy radiating rib, and the inner wall of the cylinder end cover is provided with an oil duct; a heat-dissipation through hole is arranged beside an air outlet of a cylinder end, and is connected to the upper side of a mounting hole of a spark plug; an oil injection hole is arranged on a right tank and oriented to the top of an inner cavity of a piston; a driving chain wheel is arranged on a left crankshaft of a crankshaft; a crankshaft connecting-rod piston mechanism drives a top cam chain distribution structure for transmission through the driving chain wheel; a camshaft is arranged on the cylinder end and fixed by a camshaft cover; an oil hole is arranged on the camshaft cover and corresponds to an opening of the oil duct on the inner wall of the cylinder end cover; swinging arms of an inlet valve and an exhaust valve are fixed inside shaft holes of the swinging arms of the inlet valve and the exhaust valve of the camshaft cover through swinging arm shafts of the inlet valve and the exhaust valve respectively; a check plate is arranged on the camshaft cover and fixed through the swinging arm shafts of the inlet valve and the exhaust valve; and the swinging arm shafts of the inlet valve and the exhaust valve contact an inlet cam and an exhaust cam on the camshaft respectively. Because the motorcycle engine reasonably improves the heat dissipation, lubrication, transmission and so on, the engine has the advantages of strong dynamic property, low vibration, low noise and oil saving.

The invention discloses a double-crankshaft engine and belongs to the technical field of engines. The double-crankshaft engine comprises a piston and two crankshafts forming a double-crankshaft mechanism, and further comprises a cylinder block. The cylinder block comprises an air cylinder block part and a crankshaft supporting part. A piston guide rod is arranged at the lower end of the piston, the cylinder block is internally provided with a piston rod guide groove, the lower end of the piston is open and is provided with a piston end cover, and the piston end cover and the piston guide rod are detachably and fixedly connected; and the piston is a skirt-free piston with the piston guide end and the piston seal end separated, the piston seal end is a piston head, and the piston guide end is provided with the piston guide rod and the piston rod guide groove. The double-crankshaft engine is good in manufacturability, the piston is designed through isostress, strength is increased, abrasion-resisting design is adopted in a connecting part of a connecting rod and the piston, and the abrasion resisting performance and the reliability of the whole engine are improved.

The invention discloses a piston and connecting rod assembly. The piston and connecting rod assembly comprises a piston, a ball socket lining and a connecting rod, wherein a ball socket concave towards a combustor of the piston is arranged at the upper end of the skirt section of the piston, two piston pin holes are symmetrically formed in the skirt section, and the ball socket lining is detachably installed in the ball socket of the piston; the small end of the connecting end is a ball head which is matched with the ball socket lining to form a ball socket matching pair, a connecting rod pin hole is formed in the small end of the connecting rod, and the connecting rod is connected to the piston through a piston pin penetrating through the piston pin holes and the connecting pin hole. According to the piston and connecting rod assembly, the function of the piston pin is weakened, and gas pressure is transmitted through ball socket hinging; through the arrangement of the ball socket matching pair, the height of the piston is reduced, the overall height is reduced, the weight of the piston is reduced, reciprocating inertial force is reduced, and the vibration damping purpose and the light-weight purpose are realized; besides, due to the fact that the piston pin does not need to bear transmission pressure, ablation of a lining of the small end of the connecting rod can be avoided, and the reliability of an engine can be improved.

The invention relates to a multiple carbon and ceramic base composite material piston and a preparation method and application thereof. The preparation method is as follows: using carbon fiber or polyacrylonitrile based preoxidized silk to prepare a piston preform; using a chemical vapor infiltration method and/ or precursor infiltration and pyrolysis method for preliminary densifying of the piston perform, using the chemical vapor infiltration method for further densifying of the obtained product to obtain a composite piston with the density of 1.74-2.0g / cm<3>; machining the obtained composite piston into final size design to obtain the composite piston finished product. The piston mass and the thermal expansion coefficient of the piston are reduced, the mechanical strength of the piston is improved, heat loss is effectively reduced, and noise and hydrocarbon and nitrogen oxide emissions can be reduced to achieve energy saving and environmental protection.

The invention relates to a gasoline engine, which comprises a piston, a combustion chamber and a fuel-oil supplying system, wherein the piston is formed by a piston top, a head, a pin seat and a skirt, wherein the ratio of the height of the skirt to the total height formed by the head and the skirt is 0.6 to 0.7, and the ratio of the chord length of the projection of the molded line of the skirt on a plane on the piston top to the diameter of a cylinder is 0.5 to 0.6; the combustion chamber is hemispheric and is jointly formed by a cylinder head, the piston top, a cylinder-head gasket and one part of a box body, and the surface-to-volume ratio delta of the combustion chamber is 0.15 to 0.25; the fuel-oil supplying system comprises a gasoline pump, a ventilating pipe and a negative-pressure pipe, wherein a negative-pressure impulse-type gasoline pump is adopted as the gasoline pump, the ventilating pipe is arranged on a cylinder head cover, one end of the negative-pressure pipe is connected with the ventilating pipe of the cylinder head cover, and the other end of the negative-pressure pipe is connected with the negative-pressure impulse-type gasoline pump. Through the improvement on structures, such as the piston, a connecting rod, a rocker and the like, the frictional work is reduced, and therefore the mechanical efficiency of the gasoline engine is greatly enhanced.

The invention relates to a piston connecting rod structure of an internal-combustion engine. A piston is hinged with a connecting rod small end through a piston pin. The piston connecting rod structure is characterized in that the left and right symmetrical sides of the connecting rod small end are provided with inclined planes so that the connecting rod small end forms a wedge-shaped head; the center of the inclined plane at the symmetrical side of the wedge-shaped head is provided with a through hole for assembling the piston pin; the part of the piston for assembling a connecting rod is provided with a wedge-shaped groove; and a pin hole formed on a piston pin seat of the piston passes through the wedge-shaped groove. The connecting rod small end adopts a wedge-shaped structure, so a reciprocating inertia force of the connecting rod is reduced by subtracting the residual mass of the connecting rod, and meanwhile the strength and rigidity of the piston connecting rod can be satisfied.

The invention discloses a gasoline engine crankshaft which comprises a main journal and crank arms arranged at intervals on the main journal in order. A weight reducing through hole is formed in a connecting rod journal which is connected with the crank arms. The weight reducing through hole is a semicircular opening which is in smooth transition in the radial direction. The semicircular opening is positioned between the axis horizontal plane of the connecting rod journal and the top of the connecting rod journal. The straight bottom of the semicircular opening is close to the axis horizontal plane of the connecting rod journal and is a first wall thickness away from the axis horizontal plane of the connecting rod journal; a circular arc top of the semicircular opening is close to the outer edge of the top of the connecting rod journal and is a second wall thickness away from the outer edge of the top of the connecting rod journal. According to the gasoline engine crankshaft, the weight reducing through hole of a traditional crankshaft connecting rod journal is designed to achieve the purposes of weight reduction of the crankshaft, the improvement of the balance rate of the crankshaft and the reduction of engine fuel consumption.

The invention provides a single-valve four-stroke internal combustion engine. The single-valve four-stroke internal combustion engine comprises a piston, a cylinder, fuel injectors, a cylinder head and a valve. The cylinder is fixedly connected with the cylinder head. A gas flow passageway is arranged in the cylinder head. The gas flow passageway is composed of an intake way, an exhaust way and a cooling gas way which communicate with one another. An intake valve is arranged in the intake way. An exhaust valve is arranged in the exhaust way. A cooling valve is arranged in the cooling gas way. The piston moving in a reciprocating manner is mounted in the cylinder. The valve is mounted in the cylinder head and coaxial with the piston. Multiple first through holes are formed in the valve. The multiple fuel injectors are mounted in the cylinder head. When the valve interrupts the interior of the cylinder and the gas flow passageway through the reciprocating motion, the fuel injectors are in sealed fit with the first through holes in a one-to-one corresponding manner. By the adoption of the single-valve four-stroke internal combustion engine, the mass and the reciprocating inertial force of the valve can be reduced, the oil-gas mixing is more uniform, the combustion of fuel is more sufficient, and the fuel economy and harmful matter discharge are improved.

The invention discloses an infusion pump used for a non-contact automatic hand sterilizer. The infusion pump comprises an infusion pump body, the infusion pump body comprises a shell, a liquid discharging pipe, a pump body and a driving device, the pump body comprises a pump body cavity, an eccentric cam and a blocking assembly, the pump body cavity comprises a liquid inlet cavity and a liquid outlet cavity, the liquid outlet cavity of the pump body cavity communicates with the liquid discharging pipe, and a liquid inlet is arranged at the lower end of the pump body cavity. When the driving device drives the eccentric cam to rotate in the first direction, the volume of the liquid inlet cavity is increased, liquid enters the liquid inlet cavity, the volume of the liquid outlet cavity is reduced, and the liquid in the liquid outlet cavity is discharged into the liquid discharging pipe. When the driving device drives the eccentric cam to rotate in the second direction, the volume of the liquid outlet cavity is increased, liquid in the liquid discharging pipe flows into the liquid outlet cavity, the volume of the liquid inlet cavity is reduced, and the liquid in the liquid inlet cavityis discharged from the liquid inlet. According to the infusion pump, the driving device controls the eccentric cam to rotate so that liquid suction and discharging can be directly completed, inversion can be conducted after liquid suction is completed so that liquid can be sucked back, the structure is simple, and reliability is high.

A vertical cylinder piston type internal combustion engine belongs to a power machine which takes fuel oil or combustible gas as fuel. Cylinders of the internal combustion engine are mutually perpendicular on different planes, and turn reciprocating motion of a piston (20) into rotary motion of crankshafts by an eccentric distance E of an eccentric shaft (25), an eccentric sleeve (7), a front crankshaft (5) and a rear crankshaft (22). The internal combustion engine has neither disadvantages resulting from centrifugal force and reciprocating inertia force of connecting rods nor internal gear pair of general internal combustion engines without connecting rods, reduces lateral pressure between the cylinders and the piston; lowers height of the cylinders, and leads the piston to do work in single direction or two directions. The internal combustion engine is well balanced owing to a main counterweight balance system and an auxiliary counterweight balance system. The internal combustion engine has the advantages of small size, light weight, high efficiency and small vibration. The internal combustion engine can be made into air-cooled type and water-cooled type double-cylinder or multi-cylinder gasoline engines, diesel engines or combustible gas engines.

The invention relates to a piston of an alcohol fuel internal combustion engine. At present, conventional gasoline engine pistons are corroded by alcohol fuel and combustion products thereof in the alcohol internal combustion engine, meanwhile, the compression ratio of the alcohol internal combustion engine is high, the burst pressure is large, the instantaneous temperature is high, the top of thegasoline engine piston and the head of a piston are easy to ablate at high temperature, and the heat isolation and heat resistance are poor. The piston of the alcohol fuel internal combustion enginecomprises a piston top (1), a piston head (2), a piston skirt (6) and a piston pin seat (8), wherein the piston top is a forming top, the section of the protruding portion is approximately in an ovaloid shape, and the remaining part of the piston top is of a flat top structure; the piston top is provided with a valve avoiding pit; the piston head is mainly composed of a rectangular fire bank, twogas ring annular grooves (3) and an oil ring annular groove (4); the two air ring annular grooves are filled with air rings for sealing and heat conduction; and the oil ring annular groove is placed into a combined oil ring for oil scraping, oil distribution and gas sealing assistance. The piston is applied to the alcohol fuel internal combustion engine.