Class / Patent application number | Description | Number of patent applications / Date published |
123410340 | Internal cooling of moving parts; e.g., hollow valves, pistons, and movable cylinder | 82 |
20120266829 | COOLING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - A cooling system for an internal combustion engine comprises a tubular conduit configured to conduct coolant to and from various components of the internal combustion engine and to remove excess heat therefrom. A shield portion is fluidly coupled inline of the tubular conduit and is disposed between a heat source and a cooler operating component. The expanded portion further comprises a cooling body, an inlet in fluid communication with the tubular conduit and configured to conduct coolant into the cooling body and an outlet in fluid communication with the tubular conduit and is configured to conduct coolant out of the cooling body. | 10-25-2012 |
20130247847 | COOLING DEVICE FOR ENGINE - A cooling device | 09-26-2013 |
20140020639 | LIQUID-COOLED INTERNAL COMBUSTION ENGINE - A liquid-cooled internal combustion engine having at least one cylinder with a cylinder head in which there are disposed a lower partial cooling chamber adjacent to a fire deck and an upper partial cooling chamber which is flow-connected thereto by way of at least one main overflow aperture. | 01-23-2014 |
20140261255 | AIR COOLED ENGINE AND ENGINE-POWERED WORK TOOL - An air-cooled engine includes a cylinder provided with a plurality of cooling fins at an outer peripheral surface of the cylinder, a cooling fan, a cylinder cover covering the cylinder, an air guide plate, and an air guide portion. The air guide plate is positioned between an inner surface of the cylinder cover and the fins. The cooling fan generates cooling air stream for cooling the cylinder, and the air guide plate is configured to guide the cooling air stream to flow through a space between the inner surface of the cylinder cover and the fins. A first small space is defined between the air guide plate and the inner surface of the cylinder cover. The air guide portion covers at least a part of the first small space at an upstream side of the air guide plate in the axial direction of the drive shaft. | 09-18-2014 |
123410350 | Piston | 76 |
20080223318 | COOLING SPRAYER WITH VALVE - The internal combustion engine piston cooling sprayer comprises a sprayer body ( | 09-18-2008 |
20090044768 | Piston Squirter System And Method - A piston squirter system and method for an internal combustion engine is disclosed. The piston squirter system includes an oil reservoir, a variable displacement pump, and, for each cylinder, a piston squirter that sprays oil onto a piston for cooling and lubricating. A gallery connects the variable displacement pump to the piston squirters. The variable displacement pump receives oil from the oil reservoir and distributes the oil through the gallery to the piston squirters at a flow rate according to pressure required. The gallery does not require a relief valve and the piston squirters do not require check valves. | 02-19-2009 |
20090288618 | Piston for Internal Combustion Engine - The invention relates to a piston ( | 11-26-2009 |
20090293820 | Two-cycle, opposed-piston internal combustion engine - In a two-cycle, opposed-piston internal combustion engine, opposed pistons disposed in a cylinder are coupled to a pair of side-mounted crankshafts by connecting rods that are subject to substantially tensile forces acting between the pistons and the crankshafts. This geometry reduces or eliminates side forces between the pistons and the bore of the cylinder. The cylinder and the pistons are independently cooled to reduce cylindrical deformation caused by thermal expansion during engine operation. | 12-03-2009 |
20100012055 | Cylinder and piston assemblies for opposed piston engines - In an opposed piston engine, a pair of pistons are disposed in opposition in the bore of a cylinder. The cylinder includes first liquid coolant grooves having a first cooling capacity to cool a portion of the cylinder extending from a central portion toward an exhaust port, and second liquid coolant grooves having a second cooling capacity, less than the first cooling capacity, to cool a portion of the cylinder extending from the central portion toward an inlet port. Each piston includes a cylindrical skirt with a crown and an open end opposite the crown, a piston rod with a bore, a first end attached to a back surface of the crown, and a second end extending through the open end of the skirt, a radial array of liquid coolant flow passages in communication with the bore and disposed between the first end and the back surface of the crown, and a single wristpin retained on the second end section of the piston rod and positioned externally to the piston. | 01-21-2010 |
20100037839 | NOZZLE, LUBRICATION SYSTEM AND INTERNAL COMBUSTION ENGINE COMPRISING SUCH A NOZZLE OR SUCH A SYSTEM - A nozzle is adapted to direct a jet of oil under pressure on an internal combustion engine. It has a variable outlet section, and it is provided with mechanical arrangement adapted to control its outlet section on the basis of the pressure of a fluid under pressure provided to this mechanical arrangement, independently of the oil going through the outlet of the nozzle. In the lubrication system an auxiliary line is provided with first proportional means controlling oil flow toward a nozzle. A control line connects a main line or the auxiliary line, upstream of the first proportional means, to a mechanical arrangement adapted to control the outlet section of the nozzle. The control line is provided with a second proportional arrangement controlling the pressure of oil delivered to the mechanical arrangement. The nozzle can be used as a piston cooling nozzle to direct oil toward a piston of an internal combustion engine. | 02-18-2010 |
20100095910 | NYLON BODY LOCATED PISTON COOLING NOZZLE - A piston cooling nozzle including a nylon body having a hub and a pair of integral legs extending from the hub and a tube for delivering coolant to a piston. The pair of legs are formed relative to the hub and the tube to ensure that when the body is mounted to an engine block, the legs engage a cylinder liner to thereby position the tube between a skirt of the piston and a connecting rod coupled to the piston. | 04-22-2010 |
20100107998 | Multi-part piston for an internal combustion engine - A multi-part piston for an internal combustion engine has an upper piston part and a lower piston part. The upper piston part and the lower piston part each have an inner and an outer support element, which elements delimit an outer circumferential cooling channel and an inner cooling chamber, whose cooling chamber bottom has an opening. The opening is closed off with a separate closure element, which has at least one cooling oil opening | 05-06-2010 |
20100107999 | Multi-part piston for an internal combustion engine and method for its production - A multi-part piston for an internal combustion engine has an upper piston part with a piston crown, and a lower piston part with pin boss supports and pin bosses connected with the pin boss supports. The upper piston part and the lower piston part each have an inner and an outer support element, which elements delimit an outer circumferential cooling channel. The inner support elements delimit a cavity that is open toward the pin bosses. The cavity is provided with a separate cooling oil collector that has at least one cooling oil opening. | 05-06-2010 |
20100108000 | Multi-part piston for an internal combustion engine and method for its production - A multi-part piston for an internal combustion engine has an upper piston part having a piston crown, and a lower piston part. The lower piston part has pin boss supports and pin bosses connected with them and the upper piston part and the lower piston part each have an inner and an outer support element, which elements delimit an outer circumferential cooling channel. The inner support elements delimit a cavity that is open toward the pin bosses. The cavity has a separate cooling oil collector that has at least one cooling oil opening. The piston is produced by manufacturing the upper piston part and lower piston part, inserting the cooling oil collector into the upper piston part or lower piston part, and joining the upper and lower piston parts together by friction welding. | 05-06-2010 |
20100108001 | Multi-part piston for an internal combustion engine and method for its production - A multi-part piston for an internal combustion engine has an upper piston part having a piston crown, and a lower piston part having pin boss supports and pin bosses connected with them. The upper piston part and lower piston part each have an inner and an outer support element, which delimit an outer circumferential cooling channel. The inner support elements delimit a cavity that is open toward the pin bosses, and the cavity is provided with a separate cooling oil collector that has at least one cooling oil opening. In a method for producing a piston, the upper and lower piston parts are manufactured, the cooling oil collector is inserted into one of the upper and lower piston parts in a region of the cavity, and the upper and lower piston parts are connected together at their support elements. | 05-06-2010 |
20100258064 | PISTON WITH CROWN COOLING NOZZLE | 10-14-2010 |
20100275861 | PISTON HAVING A CENTRAL COOLING GALLERY WITH A CONTOURED FLANGE - A piston has an upper crown portion with an upper combustion wall against which combustion forces act and a lower crown portion with a pair of pin bosses spaced for receipt of a small end of a connecting rod therebetween. The upper crown portion and the lower crown portion form an outer oil gallery and a central oil gallery in fluid communication with one another. The central oil gallery is formed in part by an annular flange extending radially inwardly from the outer oil gallery and upwardly toward the upper combustion wall to a free edge spaced from the upper combustion wall. The free edge forms an opening about a central axis of the piston and has a non-planar uppermost surface with depressions aligned diametrically opposite one another across the opening to improve the oil flow throughout the central oil gallery. | 11-04-2010 |
20110114038 | Ported engine constructions with low-tension compression seals - In ported engine constructions, cooling of piston crowns and cylinder liners results in reduction or elimination of bore/liner distortions, thus ensuring circularity of the bore/piston interface throughout engine operation. Consequently, the need for heavily-tensioned piston rings is eliminated. Such engine constructions incorporate annular low-tension compression seals on the pistons, which substantially reduce port bridge wear during all phases of engine operation while also limiting blow-by during combustion. | 05-19-2011 |
20110155080 | Multi-part cooled piston for an internal combustion engine - Proposed is a multi-part cooled piston ( | 06-30-2011 |
20110180025 | PISTON FOR AN INTERNAL COMBUSTION ENGINE - A piston for an internal combustion engine comprises at least one cooling channel located only in the areas of at least one inflow and at least one outflow at a low level comparatively removed from the base of the piston and at a constant higher level closer to the piston base, said cooling channel comprising steep inclines between the areas located at the low and at the high level. | 07-28-2011 |
20110192359 | PISTON COOLING APPARATUS - The present invention relates to a piston cooling device for cooling a piston. The piston cooling device according to an exemplary embodiment of the present invention includes: a cooling channel that is formed in a piston such that cooling fluid flows, and communicates with an intake port through which cooling fluid flows inside from the outside at a point and with an exhaust port through which the cooling fluid is discharged outside at another point; and a flow guide part that is formed in the cooling channel and guides the cooling fluid, which flows in the cooling channel through the intake port when the piston moves up or down, to flow to the exhaust port through the cooling channel. | 08-11-2011 |
20110265743 | PISTON FOR AN INTERNAL COMBUSTION ENGINE - A cooling structure for an internal combustion engine piston is provided. The piston includes an oil cooling channel integrated in the piston. The oil cooling channel has a bottom surface facing towards a top surface of the piston and a top surface facing away from the top surface of the piston. The oil cooling channel is provided with an oil inlet and an oil outlet which are laterally separated from each other. The bottom surface and/or the top surface of the oil cooling channel is slanted relative to a central axis of a wrist pin opening provided in said piston. | 11-03-2011 |
20110265744 | INTERNAL COMBUSTION ENGINE PISTON WITH COOLING CHANNEL SAID PISTON COMPRISING A SEALING ELEMENT SEALING THE COOLING CHANNEL - A cooling channel piston has a radially circumferential cooling channel located behind a ring field. The cooling channel piston is forged from a steel material and the cooling channel is worked in by machining between an upper part below the ring field and a lower part above the piston bosses and the piston skirts. The cooling channel extends behind the ring field in the direction of an upper face of the upper part, it being provided that the cooling channel piston has above its piston bosses and piston skirts an outwardly oriented support region. A closing element, which closes the cooling channel after the production thereof, is fastened between the lower edge of the ring field and the support region. | 11-03-2011 |
20120240881 | MULTI-PART PISTON FOR AN INTERNAL COMBUSTION ENGINE - A multi-part piston for an internal combustion engine has an upper piston part having a piston crown, and a lower piston part having pin boss supports and pin bosses connected with them. The upper piston part and lower piston part each have an inner and an outer support element, which delimit an outer circumferential cooling channel. The inner support elements delimit a cavity that is open toward the pin bosses, and the cavity is provided with a separate cooling oil collector that has at least one cooling oil opening. | 09-27-2012 |
20120325166 | CASTING CORE FOR FORMING A COOLING CHANNEL IN A PISTON - A soluble and substantially ring-shaped casting core may include a cooling channel in a piston having at least one inflow and at least one outflow. The casting core may form a closed ring and the inflow may be arranged directly adjacent to the outflow. The casting core may have a cross-sectional taper for forming a choke in the circumferential direction between the inflow and the outflow. | 12-27-2012 |
20130000572 | PISTON COOLING DEVICE - Disclosed is a piston cooling device wherein the cooling efficiency of a piston is improved by oil injected from an oil jet and supplied to a cooling passage provided in the piston, and the amount of cooling oil is reduced when an internal combustion engine is operated at maximum output. The piston cooling device is provided with a piston for an internal combustion engine, in which a circumferential passage and a cooling passage having an inlet passage and an outlet passage are provided, and an oil jet for injecting oil from an injection port to the inlet passage. The oil jet injects oil at every stroke of the piston so that a two-phase plug flow composed of gas and oil is formed in the cooling passage at least when an internal combustion engine is operated at maximum output. | 01-03-2013 |
20130025550 | LOWER COVERING OF A COOLING CHANNEL OF A PISTON - A piston cooling channel cover is disclosed. The cover includes an annular lower cover, wherein the annular lower cover is at least one of a one part cover and a multi-part cover; at least one of a standpipe-like inflow and a standpipe-like outflow, wherein at least one of the inflow and the outflow are unitarily formed with the lower annular cover. | 01-31-2013 |
20130032103 | PISTON INCLUDING A PAIR OF COOLING CHAMBERS - A piston for an internal combustion engine including a piston body ( | 02-07-2013 |
20130032104 | PISTON UPPER PART OF AN ASSEMBLED OR WELDED PISTON WITH EXTENDED COOLING SPACES - A liquid cooled piston of an internal combustion engine includes a piston lower part and piston upper part which has a combustion chamber recess. These piston components are supported via joining lands which are spaced apart radially and together form a dividing plane, and are joined together preferably with a material-to-material fit. In order to receive piston rings, the piston upper part has a ring area and includes an annular cooling channel which extends into the piston lower part and is connected to an inner cooling space connecting channels. The cooling channel is adjoined by recesses which are oriented in the direction of a piston head, are configured as a blind hole and widen conically starting from the cooling channel as far as a recess bottom. The recess bottom can be of a pronounced undulating enlarged surface or a finely undulating configuration. | 02-07-2013 |
20130055969 | PISTON FOR AN INTERNAL COMBUSTION ENGINE - The present invention relates to a piston ( | 03-07-2013 |
20130068176 | CASTING MOULD OF A PISTON - A casting mould may include a soluble and substantially ring-shaped casting core forming a cooling duct and having at least one support which bears the casting core during a casting process. The at least one support may have a pin with a needle-like point configured to penetrate the casting core and fix it onto the support. | 03-21-2013 |
20130098316 | PISTON FOR AN INTERNAL COMBUSTION ENGINE - Exemplary pistons are disclosed, e.g., for an internal combustion engine. An exemplary piston includes a lower part and an upper part, whereby the lower part and the upper part define a circumferential closed cooling gallery. The cooling gallery may be provided with a gallery bottom. The piston may further include a circumferential bar positioned on the gallery bottom, the circumferential bar defining at least one coolant inlet and at least one coolant outlet extending through the bar. | 04-25-2013 |
20130118424 | CRYOGENIC RECIPROCATING PUMP INTERMEDIATE DISTANCE PIECE - The present invention teaches providing heating elements into the nose of an intermediate distance piece of a cryogenic reciprocating pump in order to warm the piston packing seals of the pump. The heating elements increase the temperature of the piston packing seals to limit deformation of the seals while the pump is in operation. In addition, a warm, dry vapor purge may be provided to the interior of the intermediate distance piece to reduce or eliminate rime from interfering with the piston packing seals. | 05-16-2013 |
20130152883 | DEVICE FOR CONTROLLING SUPPLY OF A SYSTEM WITH A FLUID - A system for cooling internal combustion engine pistons comprising an oil pump driven by the engine, jets projecting oil on the pistons, and a control device ( | 06-20-2013 |
20130160724 | COOLING STRUCTURE OF PISTON IN ENGINE - A cooling structure of a piston in an engine, in which oil is injected toward a top portion of the piston reciprocating within a cylinder of the engine to cool the top portion of the engine. The cooling structure may include an oil guide surface including at least a thick wall portion of a peripheral wall of the piston which is provided with a ring groove and extends continuously from an inner surface of the peripheral wall of the piston to a reverse surface of the top portion of the piston. | 06-27-2013 |
20130206084 | PISTON WITH SUPPLEMENTAL COOLING GALLERY AND INTERNAL COMBUSTION ENGINE THEREWITH - An internal combustion engine and piston therefor is provided. The piston has a body including an upper combustion wall, a cylindrical outer wall including a ring belt region depending from the upper combustion wall, and a pair of pin bosses having axially aligned pin bores. The piston has a first cooling gallery in radial alignment with the ring belt region with a cooling medium contained therein. An insert member is fixed to the body in axially spaced relation beneath a lower wall of the first cooling gallery. The insert member bounds a second cooling gallery beneath the lower wall of the first cooling gallery. The insert member has an inlet opening configured to allow oil to flow into the second cooling gallery against the lower wall of the first cooling gallery and a separate outlet opening configured to allow the oil to flow outwardly from the second cooling gallery. | 08-15-2013 |
20140020640 | PISTON INCLUDING A PAIR OF COOLING CHAMBERS - A piston for an internal combustion engine including a piston body ( | 01-23-2014 |
20140060464 | APPARATUS CONFIGURED TO SHELTER OIL-JET DEVICE FROM INADVERTENT INSTALLATION DAMAGE - An apparatus includes an oil-jet emplacement assembly and an oil-jet sheltering assembly. The oil-jet emplacement assembly is configured to spatially emplace an oil-jet device at an installation position relative to an engine block of a vehicle. The oil-jet sheltering assembly is positioned relative to the oil-jet emplacement assembly. The oil-jet sheltering assembly is configured to protectively shelter the oil-jet device from inadvertent oil-jet installation damage. | 03-06-2014 |
20140069355 | PISTON FOR AN INTERNAL COMBUSTION ENGINE - A piston for an internal combustion engine is formed by the following steps: (a) providing a blank of a piston base body, having an outer joining surface, an inner joining surface and a circumferential lower cooling channel part that runs between the two joining surfaces, (b) providing a blank of a piston ring element, having an outer joining surface, an inner joining surface and a circumferential upper cooling channel part that runs between the two joining surfaces, (c) forming a circumferential widened region on at least one joining surface, the widened region extending toward the related cooling channel part, (d) connecting the blank of the piston base body with the blank of the piston ring element by way of their joining surfaces, by friction welding, to produce a piston blank, and (e) machining the piston blank further and/or finish-machining it to produce a piston. | 03-13-2014 |
20140174384 | PISTON FOR AN INTERNAL COMBUSTION ENGINE - A cooling structure for an internal combustion engine piston is provided. The piston includes an oil cooling channel integrated in the piston. The oil cooling channel has a bottom surface facing towards a top surface of the piston and a top surface facing away from the top surface of the piston. The oil cooling channel is provided with an oil inlet and an oil outlet which are laterally separated from each other. The bottom surface and/or the top surface of the oil cooling channel is slanted relative to a central axis of a wrist pin opening provided in said piston. | 06-26-2014 |
20140202404 | PISTON AND METHOD OF MAKING A PISTON - A monobloc piston assembly for an internal combustion engine is provided. The piston assembly includes a piston body which extends along an axis and is formed of at least two pieces of material which are joined together at least one friction weld joint which extends continuously through an annular shape around the axis. One of the pieces has an upper surface with a combustion bowl having a rotationally asymmetrical shape around the axis formed therein. Another of the pieces has a dome-shaped receiving surface which is rotationally symmetrical around the axis for slidingly receiving a portion of a connecting rod. | 07-24-2014 |
20140251240 | SYSTEM AND METHOD FOR COOLING ENGINE PISTONS - An engine cooling system and method for operating the engine cooling system is disclosed. In one example, engine oil is sprayed on to a piston via piston cooling jets. The approach judges whether or not to operate the piston cooling jets based on a benefit assessment. | 09-11-2014 |
20140305392 | Compact Cooling Device for an Internal Combustion Engine and Method for Manufacturing Such a Device - A cooling device for a motor vehicle engine connected to a cooling fluid feed system, where said cooling device comprises two superposed subassemblies, where the first subassembly comprises a feed body connected to the feed aperture and a tube connected to the feed body, the free end of which forms a first evacuation end, where the tube extends laterally relative to the feed body and is shaped so as to have a desired orientation, where the second subassembly comprises a feed body connected to the feed aperture and a tube connected to the feed body the free end of which forms the second evacuation end, where the tube extends laterally relative to the feed body and is shaped so as to have a desired orientation, and where the feed bodies are securely attached to one another in sealed fashion. | 10-16-2014 |
20150027388 | OIL JET | 01-29-2015 |
20150027389 | LUBRICATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE, AND METHOD FOR LUBRICATION - Embodiments for a lubrication system for an internal combustion engine are provided. In one example, a lubrication system for an internal combustion engine comprises a lubricant circuit, a radiator for cooling the lubricant, a heat accumulator arranged upstream of the engine for warming up the lubricant, the heat accumulator connected in parallel to the radiator, and a valve for switching over the lubricant circuit between the radiator and the heat accumulator. In this way, the oil may be rapidly heated during cold engine start conditions. | 01-29-2015 |
20150059666 | INTERNAL COMBUSTION ENGINE WITH AT LEAST ONE CYLINDER - An internal combustion engine that includes at least one cylinder with at least one piston reciprocating in a cylinder liner; a piston cooling device to cool the piston, and which includes at least one spraying tube with a spray nozzle which is directed towards a bottom side of the piston facing a crankcase, the at least one spraying tube being fixed to the cylinder liner; and a connecting channel arrangement to fluidically connect the spraying tube to an oil supply channel arranged in a cylinder block, the connecting channel arrangement including at least one connecting channel formed at least partly in the cylinder liner, and at least one curved connecting channel. In order to ensure reliable piston cooling, the connecting channel arrangement includes at least one curved connecting channel. | 03-05-2015 |
20150075455 | PISTON FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR PRODUCING SAME - A piston for an internal combustion engine has a piston head and a piston skirt. The piston head has a circumferential ring part and a circumferential cooling channel in the region of the ring part. The piston skirt has piston bosses with boss bores and which are arranged on the lower face of the piston head via boss connections. The piston bosses are connected to one another via running surfaces. At least one bore is provided which is closed towards the outside and which is arranged between a running surface and a boss bore. The at least one bore opens into the cooling channel, and the cooling channel and the at least one bore contain a coolant in the form of a low-melting metal or a low-melting metal alloy. | 03-19-2015 |
20150292390 | OIL JET APPARATUS OF INTERNAL COMBUSTION ENGINE - Provided is a valve housing configured to be inserted into an insertion hole that extends in a direction approximately orthogonal to an extending direction of an oil path and configured to be freely movable along an extending direction of the insertion hole. When an oil jet switching valve is closed, the tip end portion of the valve housing is configured to be pressed to the inner wall surface of the oil path by receiving an energized force from an energizing unit. | 10-15-2015 |
20150315995 | STEEL PISTON WITH FILLED GALLERY - A steel piston for an internal combustion including a cooling gallery containing a solid coolant, such as an aluminum-based material, is provided. The solid coolant has a thermal conductivity which is greater than the thermal conductivity of the steel material and fills at least 15 volume percent (vol. %) of the cooling gallery. The solid coolant provides for exceptional cooling along a crown of the piston, reduces corrosion and erosion along the crown, and avoids the problem of oil coking. | 11-05-2015 |
20150330286 | INDIVIDUAL PISTON SQUIRTER SWITCHING WITH CRANKANGLE RESOLVED CONTROL - One variation may include a product comprising a piston oil squirting system comprising at least one piston oil squirter operatively communicating with at least one engine oil channel and which is constructed and arranged to squirt oil at at least one piston; and at least one mechanism which is constructed and arranged to control a flow rate and a timing of at least one oil jet stream from the at least one piston oil squirter so that the oil jet stream flows at single or multiple intervals from a zero to a maximum flow rate within an engine cycle or a crankshaft revolution. | 11-19-2015 |
20150354435 | PISTON CROWN COOLING GALLERY INSERT - An internal combustion engine piston includes a crown including a ring belt portion including an outer wall and ring grooves, wherein the outer wall has a first end, a combustion bowl including an inner wall having a second end, a top wall extending between the inner and outer walls, and an annular cavity between the inner and outer walls, including an opening opposite the top wall, and at least partially defining a cooling gallery. At least one insert protrudes into the cooling gallery so as to axially overlap the ring grooves to direct coolant to desired portions of the crown. | 12-10-2015 |
20160102596 | PISTON CROWN COOLING FEATURE FOR DIESEL ENGINES - Internal combustion diesel engines require localized cooling methods for the pistons in these engines. The lubricating oil for the engine is also used as a cooling medium. The operating temperature and stresses in the newest models of diesel engines are extremely high and approach the mechanical limits of the engine component materials. Therefore, supplemental methods are required to remove the excessive heat generated during engine operation. In order to increase the amount of heat transferred to the oil from the piston in a given time, a plurality of fins or grooves are formed on some of the heat transferring surfaces of the piston, such as inside the combustion bowl. The increased surface area of the component allows more heat to be dissipated to the oil that is in contact with the surface. The more heat removed from the piston, the more efficiently and economically the engine will perform in service. | 04-14-2016 |
20160123273 | PISTON FOR AN INTERNAL COMBUSTION ENGINE - A piston for an internal combustion engine may include a piston crown and a piston skirt. The piston crown may include a piston head, a peripheral top land, a peripheral annular zone having a plurality of annular grooves and an annular closed cooling channel. The cooling channel may include a cooling channel base and a cooling channel cover. The cooling channel base may be arranged above the lower annular groove in relation to a region of combustion. | 05-05-2016 |
20160123274 | PISTON - A ferrous piston for gasoline powered engines having dimensions which achieve reduced mass and improved performance is provided. The piston crown has a thickness of less than 4 mm and includes valve pockets with an axial clearance between the valve pockets and an uppermost ring groove of less than 1.5 mm. The pin bosses have an axial thickness of less than 3.7% of a bore diameter, which is the largest outer diameter of the piston, measured between a pin bore and the crown at 1 mm from an inner face forming the pin bore. Each pin boss has a radial thickness of less than 3% of the bore diameter measured between the pin bore and a lower end of the pin boss. An undercrown surface presents a projected area of less than 45% of a total piston bore area, wherein the total piston bore area is πBD | 05-05-2016 |
20160146151 | SLIDE SHOE FOR A PISTON FOR USE IN INTERNAL COMBUSTION ENGINES - A piston for an internal combustion engine has a sliding shoe carried in a force accumulator. The sliding shoe has a channel to transfer cooling oil into a hollow space. The force accumulator is located is a channel formed by the piston, and the sliding shoe is guided partially inside the force accumulator. | 05-26-2016 |
20160186642 | Oil Jet - A body of an oil jet is provided with: an oil supply port; a cylinder; and an oil injection port. A piston valve is accommodated in the cylinder. The piston valve forms in the cylinder a differential pressure room which is a closed compartment. In the piston valve, an orifice which makes the differential pressure room being communicated with a side of the oil supply port is formed. The piston valve is biased toward a position at which the oil injection port is closed by a spring. A first oil injection nozzle is connected to the oil injection port. A leak hole which allows oil to be leaked outside of the cylinder from the differential pressure room is open at the side surface of the cylinder. Further, a second oil injection nozzle is connected to the leak hole. | 06-30-2016 |
20160201544 | Piston Cooling For Opposed-Piston Engines | 07-14-2016 |
20170232501 | HOT FORMING OF COOLING GALLERIES IN STEEL PISTONS | 08-17-2017 |
20190145301 | PISTON COOLING JETS | 05-16-2019 |
123410370 | Hollow piston rod | 10 |
20120222632 | Piston for an internal combustion engine - The present invention relates to a piston ( | 09-06-2012 |
20130269634 | COMBUSTION ENGINE WITH A PAIR OF ONE-WAY CLUTCHES USED AS A ROTARY SHAFT - Improvements in a combustion engine performance and reduced temperature of the combustion engine therefore resulting in an increase in the brake thermal efficiency where the pistons move linearly within the combustion cylinder. A pair of one-way clutches is used to convert the reciprocating linear motion into rotary motion without a crank shaft and without friction or power loss in the engine. High pressure oil is used to intercool the piston and the cylinder walls and is used for lubricating the piston ring. This configuration will improve the engine efficiency and reduce emission and result in a low cost engine. | 10-17-2013 |
20130312676 | Thermocompression Motor - A thermocompression motor includes a piston dividing a cylinder into a first and a second chamber and includes a heat exchanger having at least one air channel and at least one exhaust gas channel. In a first cycle, the first and second chamber are connected via the air channel, whereby air from the first chamber is pushed into the heat exchanger and heated air is conveyed from the heat exchanger into the second chamber. In a second cycle, fuel is burned in the second chamber. In a third cycle, only the connection of the second chamber to the exhaust gas channel is open during a subsequent volume increase of the first chamber. In a fourth cycle, fresh air is sucked into the first chamber during a further volume increase of the first chamber, while the connection between the first and second chamber via the air channel is interrupted. | 11-28-2013 |
20140083378 | COMBUSTION ENGINE WITH A PAIR OF ONE-WAY CLUTCHES USED AS A ROTARY SHAFT - Improvements in a combustion engine performance and reduced temperature of the combustion engine therefore resulting in an increase in the brake thermal efficiency where the pistons move linearly within the combustion cylinder. A pair of one-way clutches is used to convert the reciprocating linear motion into rotary motion without a crank shaft and without friction or power loss in the engine. High pressure oil is used to intercool the piston and the cylinder walls and is used for lubricating the piston ring. This configuration will improve the engine efficiency and reduce emission and result in a low cost engine. | 03-27-2014 |
20140283766 | Piston for Internal Combustion Engine - A piston for an internal combustion engine comprises a crown, a skirt section extending from the crown, and an oil ring groove. The piston further comprises a drain hole and a cooling channel. The drain hole extends from the oil ring groove to an inside space of the piston. The cooling channel is formed in the crown at a level above the oil ring groove, and arranged to covey a cooling oil. The cooling channel includes a channel segment which is located near the drain hole and which is formed to have a sectional shape avoiding the drain hole. | 09-25-2014 |
20140283767 | Piston for Internal Combustion Engine - A piston for an internal combustion engine, including a crown portion that defines a combustion chamber, a ring-shaped cooling channel formed in the crown portion, through which a cooling oil flows, and a plurality of concave portions formed on at least one side of the cooling channel, in an axial direction of the piston, each of the plurality of concave portions having a curved surface. | 09-25-2014 |
20150075456 | PINLESS PISTON WITH GALLERY - A piston assembly having a piston member and a connecting rod. The piston member has a crown portion and a lower portion bonded together with a cooling gallery formed between them. The connecting rod has a ball end which is positioned in a socket in the piston member. In one embodiment, the ball end can have two flat surfaces and be held in position by C-clips. In another embodiment, the ball end is cylindrically shaped and the socket has a corresponding shape. | 03-19-2015 |
123410380 | Wrist pin type; e.g., nonrigidly connected | 3 |
20140261256 | CONNECTING ROD WITH LUBRICATION PASSAGE - Exemplary connecting rods and piston assemblies are disclosed. An exemplary connecting rod includes a shaft extending between a piston pin end and a crankshaft pin end, where the piston pin end defines a pin bore opening. The shaft defines a lubrication passage. The connecting rod further includes a piston pin bore surface extending about an inner circumference of the pin bore opening, and the lubrication passage extends through the shaft from the crankshaft pin end to the pin bore opening. The connecting rod may further include a valve received within the opening, e.g., a one-way valve, that is configured to permit a fluid to flow through the valve toward the piston pin end while restricting flow of the fluid through the valve toward the crankshaft pin end. | 09-18-2014 |
20160186686 | REDUCED COMPRESSION HEIGHT DUAL GALLERY PISTON, PISTON ASSEMBLY THEREWITH AND METHODS OF CONSTRUCTION THEREOF - A piston assembly, piston therefor and methods of construction are provided. The assembly includes a piston head and connecting rod operably coupled thereto via a wrist pin. The piston head has an upper crown with a combustion bowl and an undercrown surface. The lower crown includes axially aligned pin bores receiving the wrist pin. An upper wall of the lower crown has an oil inlet, an oil outlet and a concave, saddle bearing surface that bears against the wrist pin. A toroid-shaped outer cooling gallery is formed between wall portions of the upper and lower crowns, wherein the outer cooling gallery surrounds an inner cooling gallery. The connecting rod is fixed to the wrist pin for conjoint oscillation. The connecting rod has an oil passage in fluid communication with a through hole in the wrist pin to allow oil to flow therethrough into the inner cooling gallery via the oil inlet. | 06-30-2016 |
20190145345 | REDUCED COMPRESSION HEIGHT DUAL GALLERY PISTON, PISTON ASSEMBLY THEREWITH AND METHODS OF CONSTRUCTION THEREOF | 05-16-2019 |
123410390 | Side wall opening | 11 |
20100224143 | OIL SPRAY LUBRICATION AND COOLING DEVICE FOR A VARIABLE COMPRESSION RATIO ENGINE - The invention relates to an oil spray lubrication and cooling device for a variable compression ratio engine, including at least one injector ( | 09-09-2010 |
20110174245 | COOLING DUCT FOR A PISTON OF A COMBUSTION ENGINE - Disclosed is a cooling duct ( | 07-21-2011 |
20110185992 | FRICTION WELDED STEEL PISTON HAVING OPTIMIZED COOLING CHANNEL - A piston of an internal combustion engine includes a top part produced from steel and a bottom part, which are integrally bonded in the region of a contact geometry via joining webs by a friction weld to form a structural unit. At least one cooling duct permeated by a coolant is integrated in the piston, wherein a lubricating oil of the internal combustion engine passes as the coolant into an inlet opening via a free jet of an injection nozzle, flows through the cooling duct and leaves the cooling duct via an outlet opening. For the introduction of the coolant into the cooling duct, the inlet opening is assigned a flow pipe which is inserted in the bottom part and protrudes from a cooling duct base, the opening of the flow pipe being arranged above the weld beads of the friction weld. | 08-04-2011 |
20120260868 | Piston for an internal combustion engine - A piston for an internal combustion engine has a piston head and a piston skirt. The piston head has a circumferential ring belt and a circumferential cooling channel. The piston skirt has a working surface assigned to its major thrust side and to its minor thrust side. A bore that proceeds from the cooling channel is provided, which ends in the working surface assigned to the major thrust side, and is disposed at an incline, in such a manner that the bore exit encloses an acute angle (α) with the center axis (M) of the piston. An opening is formed in the working surface, and a deflection surface inclined relative to the working surface is provided between the bore and the bore exit. The working surface assigned to the major thrust side has a depression which forms at least one oil capture region above the opening. | 10-18-2012 |
20120260869 | PISTON FOR AN INTERNAL COMBUSTION ENGINE, AND INTERNAL COMBUSTION ENGINE HAVING A PISTON - A piston for an internal combustion engine has, on the lower edge thereof opposite the piston crown, at least one cutout formed in the radial direction. An internal combustion engine is provided with at least one such piston. | 10-18-2012 |
20120285404 | Piston for an internal combustion engine - A piston for an internal combustion engine has a piston head with a circumferential ring belt and a circumferential cooling channel in the region of the ring belt, and a piston skirt having a working surface assigned to each of its major thrust side (DS) and its minor thrust side (GDS). At least one bore that proceeds from the cooling channel is provided. The bore ends in the working surface assigned to the minor thrust side (GDS), in the form of a bore opening, and is disposed at an incline, in such a manner that it encloses an acute angle (α) with the center axis (M) of the piston. The working surface assigned to the minor thrust side has a depression in the region of the bore opening. | 11-15-2012 |
20130008395 | Piston For An Internal Combustion Engine - The present invention relates to a piston ( | 01-10-2013 |
20150040846 | PISTON COOLING APPARATUS - A piston cooling apparatus includes: a main body including a communication passage communicating with an oil path formed in an internal combustion engine; a nozzle pipe portion including an oil injection port configured to inject oil having passed through the communication passage toward a piston; and a filter disposed upstream of the nozzle pipe portion on the flow passage of the oil and including a hole having a smaller diameter than the minimum diameter of the oil injection port, the oil being injected toward the piston from the oil injection port, wherein: the filter is removably mounted on the outer surface of the outer wall portion of the main body existing upstream on the oil flow passage; and the main body is mounted on the internal combustion engine in a state where at least a portion of the filter is inserted into the oil path. | 02-12-2015 |
20150322887 | PISTON FOR AN INTERNAL COMBUSTION ENGINE - The present invention relates to a piston ( | 11-12-2015 |
20160115900 | PISTON FOR AN INTERNAL COMBUSTION ENGINE - A piston for an internal combustion engine may include a piston head and a piston skirt. The piston head may include a piston crown, a circumferential fire land, a circumferential ring belt having a plurality of ring grooves, and a circumferential cooling duct. The cooling duct may be open in a direction away from the fire land and may be at least partially closed by a closure element. The cooling duct may include a cooling duct bottom and a cooling duct ceiling. The piston skirt may have at least two piston bosses connected to one another via at least two running faces. At least one running face may have an inner face connected via a connecting land to an underside of the piston head. | 04-28-2016 |
20160115901 | PISTON FOR AN INTERNAL COMBUSTION ENGINE - A piston for an internal combustion engine may include a piston head and a piston skirt. The piston head may include a piston crown, an encircling fire land, an encircling ring belt having a plurality of ring grooves and an encircling cooling duct disposed radially inwards from the ring belt. The cooling duct may be open in an axial direction away from the fire land and may be at least partially closed via a closure element. The cooling duct may have a cooling duct base and a cooling duct ceiling. The closure element may be arranged on the piston head to define the cooling duct base in a position above a lowermost ring groove of the plurality of ring grooves. | 04-28-2016 |
123410410 | Poppet-type valves | 2 |
20090020082 | Hollow valve for internal combustion engine, and internal combustion engine having the hollow valve - In a hollow valve for an internal combustion engine, including a stem portion, an umbrella portion provided at one end of the stem portion, a gastight cavity that communicates the interior of the stem portion with that of the umbrella portion, and a coolant contained in the cavity, the umbrella portion has a wall portion (a lower cap) having a combustion-chamber-side wall that forms a part of a wall of a combustion chamber of the engine, and a cavity-side wall that forms a part of a wall of the cavity, and at least one high-thermal-conductivity member is provided on the cavity-side wall, for conduction of heat between the wall portion and one of at least the coolant and the stem portion as a heat-conduction medium. | 01-22-2009 |
20130014712 | VALVE COOLING DEVICE OF INTERNAL COMBUSTION ENGINEAANM ISHIMITSU; KengoAACI Wako-shiAACO JPAAGP ISHIMITSU; Kengo Wako-shi JP - The present invention provides a valve cooling device of an internal combustion engine in which engine oil is circulated in a valve that faces a combustion chamber, the valve includes: a valve umbrella portion and a valve stem an inside of the valve stem is formed with: an oil introduction channel and an oil lead-out channel a jet portion that includes a jet oil passage coaxially disposed with the oil introduction channel is provided in the extended direction of the valve stem, and the engine oil is injected from an orifice provided on a tip portion of the jet oil passage to an inner portion of the oil introduction channel. | 01-17-2013 |