17 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.

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.

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.

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.

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.

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.

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.

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).