12 results about "Opposed-piston engine" patented technology

A piston is configured to be used in a cylinder bore of an opposed-piston. The piston includes a biaxial bearing. The biaxial bearing includes a biaxial wrist pin with a diameter configured to be less than half the diameter of the cylinder bore.

The present application relates to the time sequence differentiation multi-hole array intake and exhaust mechanism of single stroke opposed piston engine, belongs to the technical field of opposed piston engine without cylinder head, including cylinder block, piston and cylinder block pipe, the two sides of cylinder block pipe are respectively provided with piston in sliding mode, the piston is connected with the cylinder block, and the circular exhaust hole group and the intake hole group are arranged on the cylinder block pipe, the present application replaces the long strip air port with the multi-hole array of the cylinder block, and solves the problems of insufficient rigidity, easy deformation and cracking of the traditional structure cylinder block.

A piston for an opposed-piston, internal combustion engine includes a crown with an end surface shaped to form a combustion chamber with an end surface of an opposing piston in the opposed-piston engine, a skirt part including a piston sidewall extending from the crown to an open end of the skirt part, a wristpin bore with first and second openings through the sidewall, a wristpin disposed in the wristpin bore, and at least two caps received in the first and second openings of the wristpin bore for sealing the wristpin bore and retaining the wristpin against axial movement.

The invention discloses a piston crown of a piston of an opposed-piston engine, the piston of the opposed-piston engine, the opposed-piston engine and a vehicle, and relates to the technical field of engines, the piston crown of the piston of the opposed-piston engine comprises a first convex part, a second convex part, a first concave part and a second concave part, the first convex part is close to the ejector side, and the second convex part is close to the ejector side; the second convex part, the first concave part and the second concave part are close to the side of a pre-combustion chamber, the convex height of the first convex part is higher than that of the second convex part, and the second convex part is arranged between the first concave part and the second concave part. According to the piston top of the piston of the opposed-piston engine, the key problems that a hydrogen fuel opposed-piston engine is short in mixing time, abnormal in combustion risk and the like can be solved, interaction between turbulence jet flow and the wall face can be reduced, heat transfer loss is further reduced, and heat efficiency is improved.

The opposed two-stroke combustion system comprises pistons, the two pistons are symmetrically installed in an opposed piston engine, and an oil sprayer is installed on an engine body. When the distance between the two pistons is closest, the nozzle residual seam is approximately combined into a round hole which can contain and does not make contact with the oil sprayer nozzle. According to the opposed two-stroke combustion system capable of accelerating diffusion of the splashes, fog injectors collide with the splashing wall face in advance, large liquid drops are converted into small liquid drops in advance, the fog injection development time is saved, the combustion duration is shortened, the requirement of two-stroke work is better met, fuel oil can be prevented from being attached to the wall through the arrangement of gas film steps, and the service life of the fuel oil is prolonged. The economical efficiency and the practicability of the engine are improved; meanwhile, larger oil injection pressure can be introduced in the fog injection impact process, the larger the oil injection pressure is, the better the effect that liquid drops are broken into small liquid drops in the impact process is, the more ideal the angle of liquid drop reflection is, the opposed piston technology is not affected by the limitation of the oil injection pressure any more, and therefore the limit of the opposed piston technology is expanded.

The invention relates to an opposed piston engine core structure and an assembling method thereof, and belongs to the technical field of internal combustion engines. The structure is constructed through the following assembling steps that firstly, the fixed gear ring is fixed to the cylinder body in a non-detachable mode, and a gear reference is formed; secondly, a crankshaft assembly integrated with a planetary gear is installed on the cylinder body, the planetary gear and the fixed gear ring are synchronously and internally meshed, and a motion restraining mechanism is formed; and finally, the pistons are assembled to the first shaft neck and the second shaft neck of the crankshaft through connecting rods in a rigid connection mode without movable hinges. According to the formed core structure, the piston-connecting rod system is forced to do linear reciprocating motion only along the axis of the air cylinder by utilizing the internal meshing constraint, and the lateral force of a piston in a traditional engine is thoroughly eliminated. The invention further provides an engine comprising the core structure. According to the scheme, the structure is compact, friction and vibration can be remarkably reduced, and efficiency and reliability are improved.

The application provides a kind of control method of piston motion and energy output of opposed-piston engine, comprising: obtaining the average phase difference of the crankshafts on both sides of the engine and the piston motion law of the pistons on both sides;According to the average phase difference and the target average phase difference, and based on the first crankshaft control strategy, determine the required torque cycle average value of the crankshafts on both sides, according to the piston motion law and the target piston motion law, and based on the second crankshaft control strategy, determine the required torque cycle pulsation value of the pistons on both sides;Superimposed processing is carried out on the determined torque cycle average value and torque cycle pulsation value to determine the required cycle torque of the crankshafts on both sides, and then interfere with the piston motion law.The application adopts the energy output mode of double motor, and controls the piston motion and energy output of the crankshafts on both sides of the engine respectively, to realize the purpose of improving overall efficiency and working stability.

The invention relates to a lubricating system for supplying oil to the shaft end of a rotating shaft of a rotary opposed piston engine, and belongs to the technical field of internal combustion engines, the lubricating system comprises an oil inlet end cover for supplying oil to an inner shaft and a piston in which an oil duct is cast, the inner shaft supplies oil to each lubricating part of the engine through the oil inlet end cover, and the piston lubricates the interior of the piston through the internal oil duct. The oil inlet end cover is adopted to supply oil to the inner shaft, oil supply in a machine body parallel connection mode is avoided, the size of the machine body is reduced, the engine structure is more compact, an oil channel in the piston lubricates the interior of the piston, lubricating oil is input into an air inlet of the machine body to lubricate the exterior of the piston, and composite lubrication of the piston is achieved jointly.

The invention relates to the technical field of internal combustion engines, and discloses an opposed piston engine of an integrated precombustion chamber piston structure and a control method, the opposed piston engine comprises an air cylinder, an air inlet piston, an exhaust piston, a spark plug and an ejector, an air inlet section and an exhaust section are arranged in the air cylinder, the air inlet section is provided with at least one air inlet, and the exhaust section is provided with at least one exhaust port; the air inlet piston is arranged on the air inlet section in a sliding mode, and an air inlet side combustion pit and an air inlet side pre-combustion pit are formed in the end face, facing the exhaust section, of the air inlet piston. The exhaust piston is arranged on the exhaust section in a sliding mode, an exhaust side combustion pit and an exhaust side pre-combustion pit are formed in the end face, facing the air inlet piston, of the exhaust piston, and when the air inlet piston and the exhaust piston get close to each other and move to the compression ending position, the air inlet side combustion pit and the exhaust side combustion pit form a main combustion cavity. According to the combustor, the flame propagation distance can be shortened, the flame diffusion speed can be increased, the combustion period can be shortened, and the combustion rate can be increased.

The invention discloses an opposed piston engine and a vehicle, the opposed piston engine includes a first crankshaft, a second crankshaft, a gear transmission mechanism and a plurality of cylinders arranged between the first crankshaft and the second crankshaft, the first crankshaft and the second crankshaft are arranged in a parallel and spaced relationship; the gear transmission mechanism comprises a first gear, a second gear and a transition gear, the first gear is in transmission connection with the first crankshaft, the second gear is in transmission connection with the second crankshaft, and the transition gear is meshed with the first gear and the second gear; the dual-mass flywheel is in transmission connection with the first crankshaft, and the first gear and / or the second gear are / is gapless gears. According to the opposed piston engine provided by the embodiment of the invention, the output ends of the first crankshaft and the second crankshaft are connected with the gapless gears, so that the noise during operation can be reduced, and the operation stability is improved.

The application provides a single-stroke opposed-piston engine with a hollow main shaft embedded supercharging duct, and belongs to the technical field of special internal combustion engines and aviation power devices. The single-stroke opposed-piston engine with the hollow main shaft embedded supercharging duct can solve the problem of low natural scavenging efficiency of the single-stroke opposed-piston engine under high altitude environment without increasing the external volume of the engine. The single-stroke opposed-piston engine with the hollow main shaft embedded supercharging duct comprises a body, an end cover and a hollow main shaft, the body is internally provided with a piston, and an air inlet cavity is formed between the body and the end cover; the hollow main shaft is provided with an air inlet hole in the axial direction, and the free end of the hollow main shaft is connected with the air inlet cavity.