24 results about "Reciprocating engine" patented technology

A pump system may include a fluid pump including a fluid end. The fluid end may include a plunger configured for reciprocating movement, a suction valve biased to a closed position and configured to open during suction cycles of the fluid pump, and a discharge valve biased to a closed position and configured to open during discharge cycles of the fluid pump.The fluid pump may include a power end configured to drive reciprocating movement of the plunger. The pump system may be configured to variably control a torque requirement of the fluid pump. The pump system may include a reciprocating engine to produce torque to drive the power end of the fluid pump. The pump system may include a fixed-ratio gearbox or a dual-ratio gearbox operably coupling the power end of the fluid pump to the reciprocating engine using a non-fluid coupling.

A fuel supply system (1) for an internal combustion engine (10) designed as a reciprocating piston engine with a crankshaft and several combustion chambers (11, 12, 13, 14, 15, 16), in particular one powered by hydrogen, comprises a fuel rail (20, 24, 25) to which several fuel injectors (8) are connected via supply lines (22, 23, 28). At least one resonator valve (27, 30, 31) is arranged between the fuel rail (20, 24, 25) and the fuel injectors (8), the latter being designed for actuation depending on the crankshaft angle (α).

Split crankshaft in inexpensive design for reciprocating piston engines with very high operating pressures with undivided connecting rod bearings (6) and undivided crankshaft bearings (8) into which floating bearing rings (9) can be inserted to reduce the difference speed of the bearing surfaces to each other and which can be assembled and disassembled as often as desired.

The invention discloses a qualitative detection method for a loosening fault of a foundation bolt of a reciprocating engine. The qualitative detection method comprises the following steps: step 1, respectively collecting vibration signals of the foundation bolt in a normal state and a fault state in an engine operation state; step 2, obtaining a corresponding speed signal; 3, calculating an average effective value, a difference value and a relative change rate of vibration acceleration signals of the body supporting seat and the foundation in normal and fault states; 4, the average effective value, the difference value and the relative change rate of the vibration speed signals of the body supporting seat and the foundation in the normal and fault states are calculated; 5, the relative change rate of the two feature values is calculated, and whether the engine breaks down or not is judged; 6, calculating an average amplitude spectrum and a difference spectrum of the normal and fault state speed signals; 7, extracting a frequency component, and calculating an energy ratio; and 8, comprehensively judging whether a foundation bolt loosening fault occurs or not. According to the invention, qualitative detection of the loosening fault of the engine foundation bolt can be accurately and efficiently realized.

A reciprocating piston with exhaust valve suitable for power generation are disclosed. In particular, a reciprocating engine especially suited for the combustion of pressurized hydrogen gas with specific advantages that make it better suited for very large displacement engines is disclosed.

In order to enable improvement with respect to recycling performance, achieve further reduction in weight, and improve environmental performance, a cylinder liner (30) according to the present disclosure has a structure in which, out of an inner face (21i) of a cylinder (21) in a reciprocating engine, the cylinder liner is provided in only a partial region over which a piston ring (50) fit onto a piston (40) that performs reciprocal motion in the cylinder (21) slides, and a liner entire length L along an axial direction of the cylinder (21) is smaller than an inner diameter B of the cylinder, and recessed and protruding forms are formed on one lower end portion (30d) that is an end portion toward a bottom dead center side of the piston ring (50) in the axial direction.

A compressor-engine assembly (302) comprises a compressor (10) and a reciprocating engine (304), the compressor (10) being arranged to be powered by the engine (304); wherein the engine (304) has an engine imbalance when operating. The compressor (10) is arranged with a compressor imbalance when operating, at least partly mitigating the engine imbalance.

A lubricating oil supply device according to an embodiment is configured to: transfer an ammonia-containing lubricating oil from a reciprocating engine that operates by using ammonia as fuel; separate ammonia from the ammonia-containing lubricating oil; and transfer the lubricating oil, from which the ammonia has been separated, to the reciprocating engine.

An improved reciprocating engine with compound expansion suitable for power generation and in particular a reciprocating engine with compound, or secondary, expansion, especially suited for the direct injection of fuel and oxidizer for higher efficiency, carbon sequestration, and Nox reduction in large displacement combustion engines.

The invention relates to a reciprocating internal combustion engine with direct injection operating according to a modified Otto or Diesel cycle in order to re- duce the operating temperature, when maximum power is not required, with a consequent reduction in heat loss. The engine subject of the invention absorbs minimal power in the suction phase and makes it possible, when maximum power is not required, to increase the compression ratio and consequently the efficiency. The engine subject of the invention provides, for each cylinder, the use of two check valves in the suction pipe and a motorized inlet valve whose opening cycle varies according to the required power. According to a variant of the engine subject of the invention, the latter allows the replacement of the re- sidual burnt gases present in the combustion chamber of each cylinder with air and recirculated gases, pre-loading one of the two check valves mentioned above. The engine subject of the invention therefore allows the replacement of the residual burnt gases with air in order to further reduce the operating tem- peratures of the engine at the same required power, or to increase its filling, and therefore the power, at the same operating cycle.

A system includes a condensate injection system configured to fluidly couple to a combustion chamber of a reciprocating engine and an exhaust gas recirculation (EGR) system of the reciprocating engine. The condensate injection system includes a condensate tank configured to store condensate collected from the EGR system. The condensate injection system also includes a pump fluidly coupled to the condensate tank. The condensate injection system also includes an injector fluidly coupled to the pump. The injector is configured to inject condensate into the combustion chamber during a first portion of an engine cycle of the reciprocating engine. The first portion of the engine cycle includes at least part of a power stroke and / or an exhaust stroke of the engine cycle.

The invention relates to the technical field of engine crankshafts, and provides a reciprocating engine crankshaft mechanism which comprises a piston, a transmission assembly and an output shaft, and the transmission assembly is composed of a swing arm, a gear ring and a pinion. One end of the swing arm is connected with the piston, and the other end is connected with the gear ring which is meshed with the pinion in real time to form a power transmission path. Through the structural design of the inner gear ring or the outer gear ring, the conversion from the reciprocating motion of the piston to the continuous rotation of the gear is realized in cooperation with the meshing mode of the standard / eccentric / non-circular gear. According to the mechanism, periodic fluctuation of a force arm of a traditional crankshaft mechanism is eliminated through swing arm hinging, combined connection, rigid connection and the like by means of the curve movement characteristic of a gear ring, and it is ensured that the acting force arm keeps stable in the power transmission process. The crankshaft mechanism effectively solves the problem of energy loss caused by the fact that a force arm of a traditional crankshaft mechanism returns to zero near upper and lower dead points, remarkably improves transmission efficiency, reduces vibration and part abrasion, and has the remarkable advantages of improving heat efficiency and operation stability.

An engine comprises a central main output shaft, flywheels arranged at the two ends of the central main output shaft, opposed air cylinders, a power transmission mechanism, a transmission mechanism and a plurality of power units linked with the opposed air cylinders, and the power units are evenly arranged around the axis of the central main output shaft in the circumferential direction; wherein each power unit comprises a piston, the pistons on the two sides of the opposed cylinders are coaxially opposite in pairs, and a hedging structure is formed in the opposed cylinders; according to the reciprocating engine, a crank connecting rod structure of a traditional reciprocating engine is removed, cylinder body circumferential uniform distribution and piston hedging arrangement are adopted, bidirectional stress of the system is balanced, and therefore the reciprocating engine has the advantages of being high in reliability, high in reliability and high in reliability. The whole machine is small in vibration, stable in operation and long in service life.

The present disclosure provides a system including an engine head mounted to an engine block of a reciprocating engine, and the engine head includes an intake flow passage, an exhaust flow passage, a coolant flow passage, and a first seal register and a second seal register disposed on opposite sides of the coolant flow passage. Further, the first and second seal registers are configured to receive a valve guide for supporting a valve stem of an exhaust valve. Further, the first seal register is disposed in a wall that separates the exhaust flow passage from the coolant flow passage. Further, a first wall portion of the wall extends between the first seal register and an exhaust valve seat configured to receive a valve head of the exhaust valve, and a second wall portion of the wall extends from the first seal register away from the first wall portion.

Provided are methods and systems to generate power from hydrogen in a hybrid hydrogen power generation system including two or more different hydrogen power generation systems. In some examples, electricity may be generated to power oilfield equipment by hydrogen fuel cells and / or by solid oxide fuel cells. Electricity may also be generated to recharge an energy storage for future electricity use. Hydrogen may also be injected directly into an internal combustion engine powering oilfield equipment such as a turbine and / or a reciprocating engine to lower hydrocarbon-based fuel consumption.

The invention relates to a method for operating a spark-ignited reciprocating engine (2) with a crankcase (5) and with at least one cylinder (3) in which a piston (4) is movable back and forth when a supplied fuel-air mixture (12) is ignited in a combustion chamber (7), and with a water injection (8), wherein overflow gases (9) from the combustion chamber (7) enter the crankcase (5). To improve the operation of a spark-ignition reciprocating engine (2), the fuel-air mixture (12) is corrected as part of a mixture correction (11) depending on a transfer gas mass flow from the combustion chamber (7) into the crankcase (5), wherein the transfer gases (9) are, at least partially, discharged from the crankcase (5) and directed into the intake manifold (6) at a transfer gas inlet point (13), wherein the mixture correction (11) is carried out depending on the amount of water injected.

Systems and methods are provided for a camless reciprocating engine control system that uses laser absorption spectroscopy (LAS) sensors and artificial intelligence / machine learning to optimize engine operation. The control system evaluates LAS data in real time or substantially real time to optimize the operation of the engine through dynamic management of camless engine components such as intake valves, exhaust valves, fuel injectors, spark plugs, and variable compression mechanisms.

To provide a hybrid power generation device that generates power stably and safely in accordance with demand without limiting the purpose or place of use. [Solution] The system comprises a power unit that drives a stopped flywheel using a motor or reciprocating engine, an electromagnetic induction unit that has a fixed ring around the flywheel, with multiple permanent magnets arranged circumferentially around it, and multiple electromagnetic induction terminals that generate electromagnetic induction toward the permanent magnets, and that has the function of transmitting a signal to the electromagnetic induction terminals to generate the electromagnetic induction, and a power generation unit that has a generator powered by the rotation of the flywheel.

The application provides a piston crown, a piston skirt and a combined piston, and relates to the technical field of reciprocating engine components. The piston crown and the piston skirt provided by the embodiment of the application guide lubricating oil to a contact surface by arranging a vertical oil hole extending to the contact surface, so that a lubricating oil film is formed on the contact surface, a certain thrust bearing effect is achieved, and the wear of the contact surface is reduced, and the risk of fretting cracking is reduced.

A fuel reforming system includes a reciprocating engine; a decomposer that decomposes a hydrocarbon fuel; and a hydrocarbon fuel supply device. The reciprocating engine includes an intake port, an exhaust port, and a third port that allows a cylinder and the decomposer to communicate and that is opened and closed by an on-off valve. The on-off valve opens in a stroke in which a combustion gas inside the cylinder is supplied to the decomposer with ascending of a piston. The on-off valve opens in a stroke in which a combustion gas, in which the carbon and the hydrogen gas has been removed, is introduced from the third port to the cylinder with descending of the piston. The hydrocarbon fuel supply device injects the hydrocarbon fuel into the third port between the on-off valve and the decomposer during a stroke in which the on-off valve is closed.

An aircraft, such as a rotary-wing aircraft, may be selectably fitted with power modules that may be installed in or removed from corresponding openings in the aircraft fuselage. The power modules may be interchangeable with other power modules, The power modules may utilize different technologies or thermodynamic cycles to generate power, including electrical batteries, fuel cells, a turbine powered generator, a reciprocating engine-powered generator, a turbine engine, a reciprocating engine, or other electrical or mechanical sources of power. The power modules may transfer electrical or mechanical power to the aircraft to maintain the aircraft in flight or to provide propulsion to the aircraft. An aircraft control system may detect the installed power modules and adjust inceptors and displays to correspond to the installed power modules.

The present invention discloses a double crankshaft reciprocating engine comprising a cylinder assembly and a double crankshaft transmission system. The cylinder assembly comprises a cylinder, a piston and a displacer. An intake valve is provided at the top of the cylinder. The piston is mounted in the cylinder and forms a combustion chamber with an inner wall of the cylinder located above the piston; the displacer is mounted below the piston, and a space between the displacer and the piston is a compression chamber. The piston is provided with first vent holes and a first exhaust valve. The displacer is provided with second vent holes and a second exhaust valve. The double crankshaft transmission system comprises a double crankshaft and a plurality of rhombic drive mechanisms, and the rhombic drive mechanisms are connected to the displacer and the piston through a displacer rod and a piston rod, respectively.

The invention discloses a novel rotary double-rotor piston pumping mechanism which comprises a shell, a precise sleeve assembly is arranged in the shell, and the precise sleeve assembly comprises two parallel and independent working cavities; an air inlet, a pre-compression opening, a transfer opening and an exhaust opening are formed in the peripheral wall of the precise sleeve assembly. According to the novel rotary type double-rotor piston pressure pumping mechanism, through an innovative double-rotor phase difference cooperation mechanism, a revolutionary cross-shaped buffering blocking plug sealing system, an efficient double-vortex combustion chamber and volume differentiation design, four-stroke circulation is successfully and equivalently achieved in a rotation period; the rotary engine integrates the advantages of compact structure and stable operation of a rotary engine, effectively overcomes the inherent defects of the traditional rotary engine in the aspects of torque, oil consumption and sealing reliability, is obviously superior to a reciprocating engine in power density and vibration performance, and represents a breakthrough design with great potential in the field of power / compression core parts.

A fuel supply system (1) for an internal combustion engine (10) designed as a reciprocating piston engine with a crankshaft and several combustion chambers (11, 12, 13, 14, 15, 16), in particular one powered by hydrogen, comprises a fuel rail (20, 24, 25) to which several fuel injectors (8) are connected via supply lines (22, 23, 28). At least one resonator valve (27, 30, 31) is arranged between the fuel rail (20, 24, 25) and the fuel injectors (8), the latter being designed for actuation depending on the crankshaft angle (α).