Abstract: A shielding component, a heat shield in particular, has at least two shield components (10, 12) detachably connected to each other by a connection unit. The connection unit has at least one snap fastener (16), with the stud element (18) connected to one shield component (10) and with the eyelet element (22) connected to the other shield component (12). The shield components may be reliably separated from each other and reconnected to each other with exertion of little manual effort.

Abstract: A marine engine control system comprising a water jacket, an outlet sensor, and a control module. The water jacket directs a flow of water across a catalytic converter to cool the catalytic converter. The outlet sensor module measures an actual temperature of the water. The control module determines an expected temperature of the water when the catalytic converter is functional.

Abstract: A collector for liquid cooled exhaust includes a retention member, a coolant transfer plate and a collector housing. The retention member fits between at least two exhaust jacket pipes and is attached thereto. Holes are formed through the coolant transfer plate to receive the at least two exhaust jacket pipes and exhaust pipes. Such holes form respective sealing grooves therein, and respective sealing rings are received in such sealing grooves. The coolant transfer plate is secured to the retention member with welding or the like. At least one coolant opening is formed through each exhaust jacket pipe at substantially at end thereof, adjacent a coolant passage cavity in the coolant transfer plate. The collector housing is attached to the coolant transfer plate. Coolant flows between the exhaust pipes and exhaust jacket pipes; through the coolant transfer plate; and through the coolant housing.

Abstract: An exhaust-gas cooler for an internal combustion engine has a plurality of flow channels which conduct exhaust gas. The flow channels are arranged within a housing (1) and are in thermal exchange with a fluid for cooling the exhaust gas. At least one filter member (3) for filtering particles from the exhaust-gas flow is integrated structurally into the exhaust-gas cooler.

Abstract: An exhaust manifold cooling jacket has internal passages for the circulation of liquid coolant and encloses an exhaust manifold such that a gap is created between the exhaust manifold and cooling jacket. Flowing coolant through the jacket regulates outer jacket temperature while enabling high intra-manifold exhaust gas temperatures for thorough intra-manifold combustion and improved emissions. A liquid-cooled exhaust system includes a turbocharger disposed between manifold and elbow, with liquid coolant flowing from manifold to elbow through the turbocharger. Another liquid-coolant exhaust manifold contains an internal exhaust combustion catalyst wrapped in an insulating blanket. In some marine applications, seawater or fresh water coolant is discharged into the exhaust gas stream at an attached exhaust elbow.

Abstract: The present invention relates to a heat exchanger including a partitioning plate and flow channels of at least two systems which are partitioned by the partitioning plate, in which the partitioning plate is made of a clad sheet having a base material made of stainless steel or a nickel-based alloy, and a clad layer having brazing properties and corrosion resistance to a corrosive fluid, an entire surface of the base material which is exposed to the flow channel of at least one system being coated by the clad layer. According to the present invention, the heat exchanger, in which the corrosive fluid flows, can be reduced in size, and the performance thereof can be enhanced. Furthermore, it is possible to simplify the manufacturing process of the heat exchanger.

Abstract: An exhaust gas muffler for an internal combustion engine, especially the engine of a manually-guided implement such as a power saw, a cut-off machine, or the like. The muffler has a housing having an inlet for exhaust gases and an outlet out of the housing. The housing has an outer wall over which the exhaust gases from the outlet flow. To achieve an adequate cooling of the exhaust gas muffler and the discharging exhaust gases, the exhaust gases out of the outlet draw in atmospheric air between the exhaust gases and the outer wall of the housing.

Abstract: A heat-receiving member includes a base and a surface layer. The base has a surface and includes at least one of aluminum and an aluminum alloy. The surface layer is provided at the surface of the base. The surface layer is anodized.

Abstract: An exhaust-gas cooler includes a housing having a bypass duct and a cooling zone having arranged therein an exhaust-gas cooling duct which includes an entry cooling duct, at least one reversing duct connected to the entry cooling duct, and an exit cooling duct connected to the reversing duct. The reversing duct is constructed to conduct the exhaust-gas flow in opposite direction to a direction of flow in the entry cooling duct and the exit cooling duct. A control element is received in the housing for selectively directing an exhaust-gas flow through the bypass duct or through the cooling zone, with the bypass duct being segregated from a deflection zone of the reversing duct.

Abstract: The invention relates to an arrangement (1) for cooling exhaust gas, said arrangement comprising a housing (2) containing a heat transfer region (5), an actuator for regulating the flow of exhaust gas through the heat transfer (5) region, and/or a bypass channel(6). Said housing (2)is embodied as a single component in the longitudinal direction of the inventive arrangement (1), and the actuator is arranged in the housing (2).

Abstract: An engine includes exhaust manifold integrally formed with a cylinder head. The engine may include an exhaust manifold having at least one single exhaust outlet for exhausting exhaust gas that is exhausted from at least two cylinders that are not adjacent with each other, wherein periods during which exhaust valves are open are not overlapped with each other between the at least two cylinders. The exhaust manifold is integrally formed with the cylinder head such that costs can be reduced. Also, the water jacket is formed between the exhaust passages of the exhaust manifold such that the durability of the turbocharger that is affected by a heat load can be improved. Also, the twin scroll turbocharger is directly connected to the exhaust outlet of the manifold such that the compression ratio of the intake air can be effectively improved.

Abstract: A marine engine exhaust system has an oxygen sensor located within a catalyst housing structure and downstream from a catalyst device. The oxygen sensor is located away from a reversion liquid trajectory path that defines the likely path of liquid water flowing in a reverse direction through the marine engine exhaust system toward a plurality of exhaust ports of the engine. By locating the oxygen sensor away from this reversion liquid trajectory path, the likelihood of damage to the oxygen sensor from contact with liquid water is significantly reduced.

Abstract: An exhaust system includes a reverse flow heat exchanger having a plate separating an intake chamber and an exit chamber, each chamber having an inlet and an outlet located at opposing ends to allow flow therethrough. The plate can include a vane connected to the end of the plate in the vicinity of an inlet or an outlet. The vane is configured to reduce resistance to fluid flow near the intake chamber inlet. The exhaust system includes a heating manifold, such as a combustion chamber, configured to receive an exhaust stream from the intake chamber, further heat the exhaust stream, and return the exhaust stream to the exit chamber. Embodiments of the system can be configured to additionally perform as a catalytic converter and/or a muffler.

Abstract: An exhaust system includes a reverse flow heat exchanger having a plate separating an intake chamber and an exit chamber, each chamber having an inlet and an outlet located at opposing ends to allow flow therethrough. The plate can include a vane connected to the end of the plate in the vicinity of an inlet or an outlet. The vane is configured to reduce resistance to fluid flow near the intake chamber inlet. The exhaust system includes a heating manifold, such as a combustion chamber, configured to receive an exhaust stream from the intake chamber, further heat the exhaust stream, and return the exhaust stream to the exit chamber. Embodiments of the system can be configured to additionally perform as a catalytic converter and/or a muffler.

Abstract: An exhaust-gas cooling device (1) for an internal combustion engine comprises a housing (2) with an exhaust-gas inlet (3), an exhaust-gas outlet (4), a valve device (5), and a U-shaped heat exchange unit (6) including an outbound flow path (7) and a return flow path (8). The housing (2) comprises, on the open side of the U-shaped heat exchange unit (6), a first (9), a second (10) and a third chamber (11). Said first chamber (9) provides a fluid connection from the exhaust-gas inlet (3) to said second chamber (10), and said third chamber (11) provides a fluid connection from said second chamber (10) to the exhaust-gas outlet (4). The valve device (5) is arranged in said second chamber (10) such that said second chamber (10) can be divided into two partial chambers (17;18), a first one (17) of said partial chambers (17;18) being arranged in fluid connection with the outbound flow path (7), and the second one (18) of said partial chambers (17;18) being arranged in fluid connection with the return flow path (8).

Abstract: A temperature regulating material 31 for regulating a temperature of an exhaust manifold 11 is provided such that individual parts of the exhaust manifold 11 are uniformed in temperature. Heat transfer materials 31A with high thermal conductivity are layered as the temperature regulating material 31 on a cover member 25 at an area corresponding to a high-temperature area HT of the exhaust manifold 11. Heat shield materials 31B are layered as the temperature regulating material 31 on the cover member 25 at an area corresponding to the low-temperature area LT of the exhaust manifold 11. A heat dissipation material 31C as the temperature regulating material 31 coats an outer surface of the area of the cover member 25 corresponding to the high-temperature area of the exhaust manifold 11.

Abstract: An exhaust device includes an exhaust pipe connected at its upstream end to a cylinder head of the engine and an exhaust muffler connected to the downstream end of the exhaust pipe for suppressing the generation of noise from a heat insulating cover that covers a part of the exhaust pipe. A heat insulating cover covers a portion of the exhaust pipe near the engine and a stay is fixed to the heat insulating cover. The stay includes a supporting plate portion curved so as to partially surround the outer circumference of the exhaust pipe. A first vibration isolating member is provided that is sandwiched between the outer circumference of the exhaust pipe and the supporting plate portion, a band member is tightened to mount the supporting plate portion to the exhaust pipe, and a second vibration isolating member is sandwiched between the supporting plate portion and the band member.

Abstract: A heat shield for an internal combustion engine exhaust system for supporting a first heat shield plate and a second heat shield plate on a U-shaped exhaust pipe extending from an exhaust port of an engine, via a support member such as band members, and heat shield plate attachment fixtures. The first heat shield plate covers all around a curved section of the U-shaped exhaust pipe in the vicinity of the exhaust port. The second heat shield plate covers an upper part of a straight section of the U-shaped exhaust pipe and extends rearwardly from the curved section. Further, since the exhaust pipe is formed as one piece, the first heat shield plate may be formed as a simple two-part structure using the band members. With this configuration, an effective heat shielding effect can be exhibited, and cost can be reduced.

Abstract: A combined EGR cooler and non-thermal plasma device has first and second fluid passageways which are in heat exchange communication with one another. One or more electrodes are located in the second fluid passageway. The electrodes are connected to a voltage source. When a voltage of sufficient magnitude is applied to the electrodes, a non-thermal plasma is generated in the second fluid passageway. The device can be constructed in the form of a shell-and-tube heat exchanger or a stacked-tube type heat exchanger, wherein the electrodes extend through the heat exchange tubes. Hot exhaust gases preferably flow through the tubes in heat exchange contact with a liquid coolant, thereby cooling the exhaust gases. The electrodes generate non-thermal plasma inside the tubes, converting at least a portion of the NO in the exhaust to NO2, which reacts with soot in the exhaust gases to generate CO2 and N2, thereby cleaning the exhaust gases.

Abstract: An exhaust gas cooling system for an engine includes an exhaust gas conduit having an inner tube defining an exhaust gas passage and an exhaust coupler surrounding the inner tube and defining a cooling water passage together with the inner tube therebetween, and a water-lock coupled with a downstream end of the exhaust gas conduit through an exhaust gas conduit coupling section which extends from an upstream end of the water-lock. The exhaust gas conduit coupling section and the exhaust coupler are coupled with each other and the inner tube extends into the interior of the water-lock. A downstream end part of the inner tube can be formed to be a wide portion having a bell mouth configuration. A diameter of the downstream end part becomes larger as a portion thereof exists closer to the end of the downstream end part. The exhaust gas cooling system for the engine can be provided for a water vehicle.

Abstract: An apparatus for cooling exhaust gas cooling the exhaust gas re-circulated includes an exhaust gas passage; at least one first cooling portion; and at least one second cooling portion, wherein the first cooling portion and the second cooling portion are made of different materials.

Abstract: An exhaust system for an engine that produces an exhaust gas during operation. The exhaust system includes a manifold in fluid communication with the engine to receive the exhaust gas and a conduit extending from the manifold in a first direction. An outlet manifold is coupled to the conduit and extends in a second direction substantially normal to the first direction. The outlet manifold defines an aperture oriented such that exhaust gas passes through the aperture and out of the outlet manifold in a third direction that is substantially opposite the first direction.

Abstract: A water-cooled internal combustion engine E is provided with a cylinder block water jacket Jb, a cylinder head water jacket Jh, and an exhaust manifold passage 38 in which exhaust gas discharged from combustion chambers 26 through exhaust ports 28 collects. The exhaust manifold passage 38 is formed only in a cylinder head 21. The exhaust gas that has collected in the exhaust manifold passage 38 is discharged through an exhaust outlet of the exhaust manifold passage 38 from a cylinder head 21 into an exhaust passage 39 formed in a cylinder block C. The exhaust manifold passage 38 is surrounded by the cylinder head water jacket Jh, the cylinder block water jacket Jb and a discharge water jacket 80 for carrying cooling water from the cylinder head water jacket Jh and the cylinder block water jacket Jb to the outside of the engine body.

Abstract: An exhaust pipe collecting structure for a multi-cylinder engine unit having multiple cylinders including a first exhaust pipe group and a second exhaust pipe group, each of which has two exhaust pipes selected from four exhaust pipes respectively connected to the four cylinders; a first exhaust sub-collecting pipe cast integrally with the first exhaust pipe group, a second exhaust sub-collecting pipe cast integrally with the second exhaust pipe group, a first joint portion located at a downstream end portion of the first exhaust sub-collecting pipe, and a second joint portion located at a downstream end portion of the second exhaust sub-collecting pipe.

Abstract: A water-cooled internal combustion engine has a cylinder head 21 provided with a cylinder head water jacket Jh through which cooling water flows. The cylinder head water jacket Jh includes a combustion chamber water jacket 70 surrounding combustion chambers 26 and an exhaust passage water jacket 71 around an exhaust manifold passage 38. The exhaust gas discharged from the combustion chambers 26 through exhaust ports 28 flows through the exhaust manifold passage. The exhaust passage water jacket 71 is divided into an upstream water jacket 72a and a downstream water jacket 72b by a partition wall 75. The cooling water flows from both the upstream water jacket 72a and the downstream water jacket 72a into the combustion chamber water jacket 70. Equality in temperature between a combustion chamber wall and an exhaust passage wall is improved and the cylinder head 21 is heated in a uniform temperature distribution.

Abstract: An internal combustion engine includes a plurality of cylinders (1 through 12) and at least one turbocharger (2) and at least one exhaust manifold (13) which passes exhaust gases from two or more cylinders (5, 6) to the turbocharger (20), wherein the exhaust manifold (13) has a region (15) cooled with a cooling device and a substantially uncooled region (14).

Abstract: A heat shield for an internal combustion engine used in a boat, or other application where engine compartment heat is unwanted, has a water cooled body positioned around, but spaced apart from, the exterior surfaces of the exhaust manifold of the engine. The concavity of the heat shield body fits the manifold and engine closely, to intercept and carry away radiant and convective heat. The shield is held in place by means of a boss which is captured between the exhaust manifold and the exhaust pipe of the engine. The shield enables industrial engines to be adapted to marine use without re-certification to meet environmental regulations.

Abstract: An internal combustion engine is provided in which the temperature of an exhaust gas gradually decreases from its upstream side to its downstream side, and the temperature of a working medium of a heat exchanger, which flows in the opposite direction to the exhaust gas, gradually increases from its upstream side to its downstream side. The temperature difference between the exhaust gas temperature and the working medium temperature is the smallest at the interface between a liquid phase region and a two-phase region of the working medium, and since a catalyst device is incorporated at the upstream side, relative to the flow of exhaust gas, of the vicinity of the position where the temperature difference is the smallest, it is therefore possible for the heat exchanger to utilize the heat generated by the catalyst device effectively.

Abstract: A moisture trap is formed as an integral part of the wall of an exhaust conduit. Tapered surfaces can be provided to direct condensate downwardly and into a reservoir of the moisture trap where the moisture is retained until the temperature of the exhaust system reaches adequate magnitudes to evaporate the water and conduct it out of the exhaust system along with the exhaust gases.

Abstract: An exhaust gas purifying system and a method for purifying exhaust gas of combustion engines. The system includes a hollow casing, a converter chamber disposed within the casing, spray nozzles for spraying a scrubbing liquid into the converter chamber for forming a moisture-saturated exhaust gas in order to remove pollutants dispersed in the exhaust gas and purifying the exhaust gas, a cooling container disposed within the casing and defining a cooling jacket enveloping the converter chamber for cooling thereof, a primary circulating reservoir fluidly connected to the converter chamber for receiving the moisture-saturated exhaust gas and separating the purified exhaust gas from a waste liquid and for cleaning the scrubbing liquid from the pollutants dispersed in the waste liquid for reuse, and a secondary circulating reservoir fluidly connected to the primary circulating reservoir for receiving the cleaned scrubbing liquid and supplying the scrubbing liquid to the liquid spray nozzles.

Abstract: First heat exchangers (H4, H3, H2) are disposed within an exhaust port (18), within a pre-catalytic device (34), and on the downstream of a main catalytic device (35); the exhaust port (18), the pre-catalytic device (34), and the main catalytic device (35) being provided in each exhaust passage (33) of a multicylinder internal combustion engine. These first heat exchangers (H4, H3, H2) are independently provided for each of the exhaust passages (33), and a second heat exchanger (H1) is disposed in a section where these exhaust passages (33) are combined. Since the first heat exchangers (H4, H3, H2) are disposed on the upstream side of the exhaust passage (33), high heat exchange efficiency can be obtained by high temperature exhaust gas, and, moreover, the occurrence of exhaust interference can be avoided, thereby preventing any decrease in the output of the internal combustion engine.

Abstract: A cylinder head for an internal combustion engine (ICE) includes a lower cooling jacket, an upper cooling jacket and an exhaust manifold disposed therebetween. The exhaust manifold enables exhaust of combustion gas from cylinders of the ICE. The lower cooling jacket has coolant flow paths in fluid communication with coolant flow paths of a cylinder block of the ICE. Coolant flow paths of the upper cooling jacket are in fluid communication with those of the lower cooling jacket through one of a plurality of passages. The passages can be selectively plugged to define coolant flow direction through the cylinder head. The upper and lower cooling jackets are in heat exchange relationship with surfaces of the exhaust manifold to cool exhaust gas flowing therethrough.

Abstract: A removable collector for liquid cooled exhaust includes a retention member, a coolant transfer plate and a collector housing. The retention member fits between at least two exhaust jacket pipes and is attached thereto. Holes are formed through the coolant transfer plate to receive the at least two exhaust jacket pipes and exhaust pipes. The coolant transfer plate is secured to the retention member with fasteners. At least one coolant opening is formed through each exhaust jacket pipe at substantially an end thereof, adjacent a coolant passage cavity in the coolant transfer plate. The collector housing is attached to the coolant transfer plate. Coolant flows between the exhaust pipes and exhaust jacket pipes; through the coolant transfer plate; and through the collector housing. The removable collector for liquid cooled exhaust may be removed from the exhaust pipes by removing the fasteners. The exhaust pipes may be retained in a line.

Abstract: A waste heat recovering device for an internal combustion engine includes: an internal combustion engine; and an evaporator into which an exhaust gas of the internal combustion engine is introduced as a high temperature fluid. An exhaust gas inlet of the evaporator is placed adjacent to an exhaust valve of the internal combustion engine. Thus, there can be provided a waste heat recovering device having a high waste heat recovery rate.

Abstract: The present invention 10 discloses an exhaust header having heat sinks forming an integral part of the header conduit 14. The heat sinks are in the form of a plurality of radially positioned longitudinal fins 20 extending between the distal ends of the exhaust header 26. The extruded fins 20 welded at 24 to the engine exhaust conduits 14 tapering at 22 toward the flange 16 which is fixedly attached to the engine. At the other distal end a large, three-inch collector 18 is disposed having a rotating flange 30 with apertures 32 therein which flange encircles the collector. In an alternative embodiment, breaks 28 are provided in the fins. The present invention 10 is designed to improve cooling efficiency, reduce engine compartment temperature and provide greater overall structural integrity of the header pipes.

Abstract: A recycled exhaust gas cooling and condensate regulation system for a natural gas fired internal combustion engine driven co-generation plant, which allows efficient exhaust recycled gas combustion while maintaining lower head temperatures to reduce thermal NOx emissions and delivering increased process/utility heat to a proximate co-generation client, is provided. The recycled exhaust gas cooling and condensate regulation system has primary and secondary, air-to-gas, exchanger units, coupled in series, such that the first unit, designed to take exhaust gas exiting the engine, cools the gas to a first exhaust gas temperature effectively super saturating the water vapor in the cooled exhaust gas; and, the second unit, designed to handle lower inlet temperatures, condenses the water vapor and super cools the exhaust gas to <130 F. In one embodiment, the engine intake mixture including the exhaust gas is supercharged.

Abstract: An exhaust manifold of an engine exhaust apparatus includes a plurality of exhaust branches and a straight pipe section. The exhaust branches extend toward a confluence portion, from respective upstream ends to be connected with cylinders of an engine. The straight pipe section extends from the confluence portion toward a downstream end adapted to be connected to an exhaust purifying catalyst.

Abstract: An internal combustion engine waste heat recovery system is provided in which a second heat exchanger, a fifth heat exchanger, a fourth heat exchanger, a third heat exchanger, and a first heat exchanger are disposed sequentially from the upstream side to the downstream side of the flow of exhaust gas in an engine exhaust passage. Water, used as a working medium, is supplied sequentially to the first, second, third, fourth and the fifth heat exchangers. Water having the lowest temperature can be supplied to the first heat exchanger on the most downstream side of the gas flow, to which exhaust gas having a comparatively low temperature is supplied. Water having a comparatively low temperature, which has passed only through the first heat exchanger, can be supplied to the second heat exchanger on the most upstream side.

Abstract: A device for supplying exhaust gases from an internal combustion engine to a catalytic converter, having multiple exhaust gas supply lines including at least one exhaust gas supply line that serves as a heat-conveying line to promote a transfer of exhaust gas heat to the catalytic converter and at least one other exhaust gas supply line that serve as a heat exchanger to promote an extraction of heat from the exhaust gas upstream of the catalytic converter. A switchable control mechanism controls a flow cross-section of at least one of the exhaust gas supply lines.

Abstract: An exhaust system for a marine engine provides individual exhaust gas conduits that are maintained separately from water conduits until the individual exhaust gas conduits can be combined within a common exhaust gas conduit. This combination of exhaust gas streams allows the amplitude of negative pressure pulses to be damped, by combination with each other, prior to the mixing of cooling water with the exhaust gas streams. Later, the combined exhaust gas stream can be mixed with a combined water stream.

Abstract: In an exhaust manifold to be mounted on a cylinder head of an internal combustion engine which cylinder head includes a plurality of exhaust passages, the exhaust manifold includes a gas collector housing with a mounting flange, a gas conducting duct arranged in spaced relationship within the gas collector housing and having a mounting collar, and a hold-down element mounted together with the flange onto the cylinder head and including a recess receiving the collar of the gas conducting duct for retaining the gas conducting duct in engagement with the cylinder head but permitting relative movement thereto.

Abstract: An exhaust elbow for a marine propulsion system is provided with a stainless steel tube within a water outlet opening to assure that a drain opening remains open even when the exhaust elbow is exposed to a corrosive environment. Since cast iron tends to expand in volume as a result of corrosion of its surface areas, water outlet openings intended to perform a draining function can be partially or fully closed as a result of corrosion. The insertion of a stainless steel tube in one or more water outlet openings of an exhaust elbow assures that an internal water cavity of the elbow can drain when the associated internal combustion engine is turned off, thereby minimizing the possibility of freeze damage to the exhaust components.

Abstract: An air gap insulated exhaust manifold for an internal combustion engine of a motor vehicle that has a catalytic converter. The exhaust manifold includes an inner pipe and an outer pipe with a connecting flange on the cylinder head side of the outer pipe. The outer pipe encloses the inner pipe and is spaced therefrom at a distance. A pipe end of the inner pipe protrudes in a guided manner into the cylinder head and only the outer pipe is fastenable to the cylinder head by way of the connecting flange.

Abstract: Disclosed is a personal watercraft capable of appropriately detecting temperatures of an engine and an exhaust manifold by using one temperature sensor and in particular capable of finding that cooling water flow is stagnant in cooling systems of them based on the detection of the temperatures. The personal watercraft comprises a water-cooled multi-cylinder engine placed in an engine room of a body, an exhaust manifold for gathering an exhaust gas from the engine, the exhaust manifold being cooled by cooling water, and a temperature sensor provided so as to be located downstream of the vicinity of an end of the exhaust manifold that is located downstream in an exhaust gas flow path.

Abstract: A marine drive comprises an open loop cooling system for cooling various engine components using water drawn from the body of water in which an associated watercraft is operating. A water inlet of the cooling system has a filter cover which includes a series of apertures through which water can flow. The apertures have a maximum cross-sectional width. After passing through the water inlet, cooling water is pressurized and directed to an engine coolant passage to cool engine components. A pilot water passage branches off of the engine coolant passage and delivers cooling water through peripheral engine components to cool the components. The pilot cooling water is discharged from the marine drive in a pilot water stream that is visible to the operator of the watercraft. No portion of the pilot water passage has a diameter that is less than the maximum dimension of the water inlet filter cover openings.

Abstract: An outboard motor features a v-type internal combustion engine having a generally vertically extending crankshaft. Exhaust gases from combustion chambers are routed through a set of exhaust manifolds positioned within the valley defined by the two banks of cylinders. The exhaust flow is merged within a passage formed in the cylinder block prior to passing the exhaust flow into a passage formed within an exhaust guide plate to which the engine is mounted. The merged flow passage is positioned to allow a compact outboard motor construction. The motor also features a cooling pattern by which the exhaust manifold runners, the exhaust manifold, the cylinder head, the valley and the cylinders are cooled in that order.

Abstract: An internal combustion engine, which can be disposed in a water vehicle, includes an exhaust system having features improving the performance, ease of manufacturing, and/or the water preclusive effects thereof. The exhaust system can include an exhaust manifold defining a plurality of exhaust runners and being made from at least two parts. The exhaust system can also include a plurality of individual exhaust passages extending from exhaust ports of the engine to a forward end of the engine. The exhaust system can also include an exhaust passage which extends from the exhaust ports to varying elevations relative to the exhaust ports, as well as other features.

Abstract: A built-up airgap-insulated exhaust manifold of an exhaust system of a motor vehicle includes at least two exhaust pipes with an inlet flange attached in each case to one end and to be fastened to the cylinder head of an internal combustion engine of a motor vehicle. The exhaust pipes include a pipe bend and at least one branched pipe piece connected to the latter. If a plurality of branched pipe pieces are arranged they are connected to one another in a row and the last pipe piece in the row forms a header connected at one end to the exhaust tract leading further on in the exhaust system. The exhaust manifold has at least one exhaust pipe, which is designed as a double pipe with airgap insulation between an outer and an inner pipe, and possessing at least one exhaust pipe without an air insulation gap. The outer pipe and the inner pipe of the airgap-insulated exhaust pipe bear against one another at the end which is plugged together with and welded to an associated inlet flange.

Abstract: A four-cycle engine includes a cylinder block defining a cylinder bore. A piston is reciprocally disposed within the cylinder bore. A cylinder head member closes an end of the cylinder bore to define a combustion chamber together with the cylinder bore and the piston. The cylinder head member defines an inner passage having a first end communicating with the combustion chamber and a second end terminating at an outer surface of the cylinder head. A valve assembly having a valve section and an actuateable section is provided. The valve section is selectively placed at an open position and a closed position to connect and disconnect the inner passage with the combustion chamber, respectively. The actuateable section is formed oppositely from the valve section. A valve actuation mechanism is arranged to actuate the actuateable section to move the valve section between the open position and the closed position.

Abstract: Manifold pipe assemblies and exhaust manifold assemblies, optionally in combination with internal combustion engines, for receiving hot gases from such heat source, and conveying such hot gases from the heat source toward a lower temperature environment. Such manifold pipe assembly comprises a manifold pipe defining a gas path for conveying hot gases from an inlet end to an outlet end, a jacket pipe encompassing the manifold pipe along a portion of the length of the manifold pipe. The jacket pipe has a second inlet end disposed toward the inlet end of the manifold pipe, and a second outlet end disposed toward the outlet end of the manifold pipe. The jacket pipe is closed about the manifold pipe at the second inlet end, to form a closed cooling chamber between the manifold pipe and the jacket pipe. An inlet pipe conveys cooling liquid into the cooling chamber.