Abstract: A premixed compression ignition engine system includes an engine, a fuel injector, a water injector, and a controller. The controller conducts: a compression-stroke mid-period injection that causes a fuel injector to inject fuel to form a fuel-air mixture in a surrounding space of a combustion chamber; a compression top-dead-center injection that causes the fuel injector to inject fuel to form a fuel-air mixture in the central space of the combustion chamber after the compression-stroke mid-period injection; and a water injection that causes a water injector to inject water to the surrounding space of the combustion chamber at a timing from commencement of the compression-stroke mid-period injection to commencement of the compression top-dead-center injection.

Abstract: There is provided a method of shutting down an engine, the engine having an air intake, and the method having the steps of attaching a valve to the air intake, the valve having an open position that allows air to pass into the air intake; using one or more sensors, detecting one or more predetermined engine conditions indicative of a runaway state; electromagnetically actuating the valve to move to a closed position preventing air from passing into the air intake once the one or more predetermined engine conditions have been detected; and causing the valve to return to the open position once a predetermined safe state has been reached.

Abstract: A two-stroke reciprocating piston engine. The engine principally consists of an expansion cylinder and a compression cylinder, and an expansion chamber and a combustion chamber. When pistons of the expansion cylinder and compression cylinder move from a bottom dead center to a top dead center, gas in the expansion cylinder is compressed in the expansion chamber, gas in the compression cylinder is compressed in the combustion chamber, a water spray nozzle sprays water towards the high temperature and high pressure gas in the expansion chamber, and when the water encounters the high temperature and high pressure gas, the water is rapidly vaporized. At the same time, an oil spray nozzle sprays a fuel into the combustion chamber, a spark from a spark plug ignites the combustible gas of the combustion chamber, the high temperature and high pressure gas produced by the combustion pushes open a valve of the combustion chamber.

Abstract: A cooling apparatus of an engine of the invention has a circulation passage for supplying cooling water to head and block passages through a heat exchanger. The apparatus circulates the cooling water through the circulation passage when a second condition is satisfied and then, a first condition is satisfied. The first condition includes a water supply condition that a supply of the cooling water to the exchanger is requested. The second condition includes the water supply condition and a condition that a cooling water temperature is lower than an engine completely-warmed water temperature.

Abstract: An engine assembly including an internal combustion engine, an oil cooler connected to the engine to receive heated oil and discharge cooled oil, and an engine cover mounted to the internal combustion engine and having an opening to receive the oil cooler therein.

Abstract: An internal combustion engine, includes a cylinder; a piston supported in the cylinder for linear displacement, wherein the piston is operatively connected with a crankshaft of the internal combustion engine via a piston rod; a linear motor including a stator and a rotor, wherein the stator has an independently operable stator element assigned to the cylinder and partially surrounding the piston in circumferential direction with respect to a longitudinal center axis of the cylinder, wherein the rotor is assigned to or forms a part of the piston, and wherein the linear motor being operable for exerting on the piston a compensation force directed in radial direction.

Abstract: An internal combustion engine is provided with one or more oil drain-back passages. The oil drain-back passage include an entrance into a crankcase via a crankcase breathing window, the crankcase breathing window disposed within and through a bulkhead wall of the crankcase. Thus, each oil drain-back passage may be routed from a cylinder head of the engine to a crankcase breathing window where oil may then enter the crankcase and flow downward into an oil pan coupled to the crankcase.

Abstract: A lubricating structure for a four-stroke engine includes a first oil groove and a second oil groove. The engine includes a crankcase, a cylinder, a cylinder head and an oil pan. The crankcase makes up a crank chamber. The cylinder head is equipped with a valve chamber housing valve driving mechanism. The oil pan is provided on a bottom of the crank chamber. The first oil groove leads mist of the lubricating oil in the crank chamber to the valve chamber by communicating the crank chamber and the valve chamber with each other. The second oil groove leads surplus lubricating oil in the valve chamber to the oil pan in the crank chamber by communicating a lower part of the valve chamber with a neighborhood of the oil pan in the crank chamber. The first oil groove is set smaller in flow path cross-sectional area than the second oil groove.

Abstract: Provided is a valve seat insert made of an iron-base sintered alloy, in which a base matrix part that includes a base matrix phase and hard particles, has a base matrix part composition containing, in % by mass, 0.5%-2.0% of carbon and 10%-70% in total of one kind or two or more kinds selected from nickel, cobalt, chromium, molybdenum, vanadium, tungsten, manganese, silicon and sulfur, with the balance being iron and unavoidable impurities, and Co-base hard particles having a composition containing, 1.0% or less of C, 25%-50% of Mo, 5%-15% of Cr, Si as an impurity in a content adjusted to be 0.3% or less, with the balance being Co, and having a Vickers hardness of 500 to 1,500 HV, are dispersed as hard particles in the base matrix phase in an amount of 10%-60% by mass with respect to the total amount of the valve seat insert.

Abstract: Circular propulsion jet compressor-engine, through a circular combustion chambers propellants spheroidal geometry set, generates a tangential push the turning radius and therefore resulting angular momentum about the shaft of the circle in rotation. This impulse is the consequence of the principle of action-reaction, the violent expansion that occurs inside the combustion chamber, when burning mixtures of fuel and oxidizer at high pressure, or by merging a small mass of H2, encapsulated and simultaneously subjected to very high pressure, constant electromagnetic fields and high-frequency electric fields and high peak intensity. The high pressure on the oxidant or H2, is achieved using the force resulting from the centripetal acceleration shaft rotating about a significant mass of a piston, solid or liquid and alternatively or cyclically. The gases and vapors produced are cooled inside the engine.

Abstract: An engine oil supply apparatus includes: an oil pump; an oil supply path which supplies oil to a hydraulic operating section of an engine; an oil cooler which is provided on the oil supply path and which cools oil discharged from the oil pump; and a control apparatus which sets a required oil pressure required from the hydraulic operating section in accordance with an operation state of the engine, as a target oil pressure, and controls the discharge amount of the oil pump so that an oil pressure inside the oil supply path equals the target oil pressure. The control apparatus controls the oil pump so that, during an operation state of the engine where the oil enters a prescribed high oil temperature state, the oil is discharged in an amount exceeding a discharge amount corresponding to the required oil pressure of the hydraulic operating section.

Abstract: A method is described for integrating a plurality of micro-gasifiers comprising gasifiers, filters, and engine sets or turbine gensets or combined cycle gensets by linking them via a common bus wherein air flow and engine fuel flow is regulated by valves controlling gas flow between the bus and engine genset or turbine genset or combined cycle genset.

Abstract: Methods of honing a surface are disclosed. The method may include spraying a coating having an initial average bulk porosity onto an engine bore wall and honing the coating to create an intermediate honed surface. The method may then include cleaning the intermediate honed surface and honing the intermediate honed surface with a cutting force of, for example, 110-130 kgf after the cleaning step. This may create a honed surface having an average porosity greater than the initial average bulk porosity. The methods may create a honed surface having a porosity that is more porous than the initially sprayed coating. The increased porosity of the honed surface may allow for increased oil retention in, for example, engine bores.

Abstract: Methods and systems are provided for preventing overheating of a power steering system. In one example, a method includes operating an engine cooling fan based on a steering wheel angle and an engine speed. The cooling fan may be operated for a duration based on the steering wheel angle and engine speed, thus eliminating the need for a dedicated power steering coolant temperature sensor.

Abstract: Provided are a heat-resistant member provided with a heat-shielding coating suitable for stable manufacturing and excellent in heat-insulating, thermoresponsive and distortion accommodating properties, and a method for manufacturing the same. The heat-shielding coating includes a metallic portion formed of agglomerates of a plurality of metal particles, and inorganic compound particles dispersed in the metallic portion. The metal particles are diffusion-bonded each other, and the metallic portion and a base material of the heat-resistant member are diffusion-bonded each other. The manufacturing method includes the steps of depositing mixed particles of the metal particles and the inorganic compound particles on a surface of the base material in a film shape; resistance-heating the mixed particles by current-passing while pressurized in a thickness direction; diffusion-bonding the metal particles each other; and the metallic portion and the base material each other.

Abstract: A compressor aerofoil for a turbine engine, having a suction surface wall and a pressure surface wall meeting at a leading edge and trailing edge, a tip plate extends between the walls and has a first and a second tip rib extending therefrom. At least one of the first and second tip rib has a height extending from the tip plate. A camber line is defined as passing through the leading and trailing edge and the camber line length is from the leading to trailing edge along the tip plate. The first and second tip rib define a slot along the camber line of the aerofoil. The first tip rib is located a distance L1 from the leading towards the trailing edge and the second tip rib is located a distance L2 from the leading edge, the distances L1 and L2 greater than 1% of the camber line length.

Abstract: In accordance with embodiments of the present disclosure, a electrical submersible pump includes a pump housing, a shaft extending at least partially through the pump housing and adapted to be driven by a submersible motor, an impeller attached to the shaft and having an impeller passage for fluid to flow therethrough, and a diffuser that is stationary relative to the pump housing and having a diffuser passage, wherein the diffuser is disposed corresponding to the impeller to form a pump stage such that fluid can flow between the impeller passage and the diffuser passage. The electrical submersible pump also includes a labyrinth seal formed between the impeller and the diffuser, wherein the labyrinth seal selectively seals the impeller passage from a cavity formed between the impeller and the diffuser to maintain the impeller in a floating condition relative to the diffuser.

Abstract: A fuel system includes a cooling fuel supply line that conveys a flow of cooling fuel from a storage tank to a mixing device. An upstream fuel return line conveys a flow of heated fuel to the mixing device from an internal combustion engine. The flow of the heated fuel from the upstream fuel return line mixes with the flow of cooling fuel from the cooling fuel supply line in the mixing device to form a flow of mixed fuel. A downstream fuel return line conveys the flow of mixed fuel from the mixing device to the storage tank. The mixing device includes a flow restrictor operable to generate a low pressure zone relative to a fluid pressure of the flow of cooling fuel in the cooling fuel return line that draws the flow of the cooling fuel through the cooling fuel supply line and into the mixing device.

Abstract: A method for starting an engine is provided. The method comprises in response to an engine start request, cycling a gaseous fuel injector prior to activating a starter motor. In this way, delayed engine starts using gaseous fuel may be mitigated.

Abstract: A pump device may include a side channel compressor that may include a housing having a conveying chamber and a fluid inlet and outlet. The compressor may include an impeller having blades radially on an outside and which may be mounted rotatably in the housing, the blades lying in the conveying chamber, and a shaft mounted rotatably about an axis of rotation and on which the impeller may be fastened. The conveying chamber may have at least one side channel running in a region of the blades and connecting the fluid inlet and outlet to one another in a circumferential direction. An intermediate region may be formed in the circumferential direction between the fluid inlet and outlet and in which a distance of the blades in an axial direction to the nearest wall may be such that no more than a predetermined amount of fluid flows in the intermediate region.