Abstract: In an internal combustion engine, a gasket is disposed between joining surfaces of a cylinder block and a cylinder head, and a heat radiation rib that extends in a cylinder axis direction is formed on the cylinder block or the cylinder head. In such an internal combustion engine, the gasket includes: a portion to be sandwiched that is sandwiched between the joining surfaces; and an extending portion that protrudes toward an outside from the portion to be sandwiched as viewed in a cylinder axis direction.

Abstract: A cooling system for a cylinder head of an internal combustion engine includes a cylindrical seat configured to engage an exhaust valve, a first coolant jacket, and a first conduit. The exhaust valve seat defines an annular cooling passage extending along a circumference of the cylindrical seat. A wall of the cylindrical seat defines a first opening into the annular cooling passage and a second opening into the annular cooling passage, where the first opening is positioned diametrically opposite to the second opening. The first coolant jacket is positioned adjacent to a fire-deck of the internal combustion engine. The first conduit fluidly couples the first coolant jacket to the at least one of the first opening and the second opening to the annular cooling passage in the exhaust valve seat.

Abstract: A system includes an engine head that mounts to an engine block of a reciprocating engine, and the engine head includes an intake flow path, an exhaust flow path, a coolant flow path, and first and second sealing registers disposed on opposite sides of the coolant flow path. In addition, the first and second sealing registers are configured to receive a valve guide that supports a valve stem of an exhaust valve. Moreover, the first sealing register is disposed in a wall separating the exhaust flow path and the coolant flow path. Also, a first wall portion of the wall extends between the first sealing register and an exhaust valve seat configured to receive a valve head of the exhaust valve, and a second wall portion of the wall extends from the first sealing register away from the first wall portion.

Abstract: An engine cooling apparatus includes an engine for vehicle traveling, a pump driven by the engine, a heat exchanger, a circulation passage for circulating cooling liquid between the engine and the heat exchanger by driving the pump, a solenoid valve capable of opening/closing the circulation passage, and a controller for controlling operations of the engine. The solenoid valve includes a valve body movable between a position away from a valve seat and a position contacting the valve seat and held to contact the valve seat and a solenoid capable of maintaining contact between the valve body and the valve seat in response to supply of power thereto. When driving of the pump under a non-energized state of the solenoid, the valve body is movable to the position away from the valve seat by the cooling liquid fluid pressure.

Abstract: A top plate is provided in a top portion of a cylinder block of a combustion engine of a type, provided with a cooling fan, so as to lie perpendicular to a longitudinal axis of an engine cylinder. An intake side gasket interposed between the cylinder block and an intake unit is extended upwardly to contact the top plate to thereby seal a gap between the top plate and the intake side gasket. An exhaust side gasket interposed between the cylinder block and an exhaust unit is extended upwardly to contact the top plate to thereby seal a gap between the top plate and the exhaust side gasket. A cooling passage for passing therethrough a cooling air from the cooling fan is formed by the cylinder block, the top plate, the intake side gasket and the exhaust side gasket.

Abstract: An engine is has a cylinder block defining a cylinder and a block cooling jacket having an open passage along a block deck face, and a cylinder head having an exhaust bridge conduit. A head gasket is placed between the block and the head and defines first and second apertures connecting the open passage of the block cooling jacket to the exhaust bridge conduit. A cylinder head has a deck face, and a cooling jacket. The cooling jacket has a passage formed by an inlet channel with a conduit at one end and extending into an exhaust bridge between adjacent exhaust ports. The inlet channel intersects the deck face and is elongated along a longitudinal axis of the cylinder head. The inlet channel has a convex surface positioned between opposed ends of the channel and extending away from the deck face.

Abstract: The invention concerns an assembly of a valve body (A) and a seal (11). The valve body (A) includes a gas flow passage (4) and a valve shutter (6) mobile between an open position and a closed position obstructing the movement of the gases in the passage (4). The passage (4) being intended to be connected to a pipe (B) to enable gas to flow between them, the seal (11) being intended to be mounted between the passage (4) and the pipe (B) to provide a gas seal between them. The assembly is characterized in that the seal (11) forms a seat for the valve shutter (6) in the closed position. The seal provides, on the one hand, a seal between the passage and the pipe whether the valve shutter is in the open or the closed position and, on the other hand, a seal for the valve shutter in the closed position.

Abstract: A cylinder head of an internal combustion engine in which a cooling circuit is arranged, suited for a coolant circulation, includes a peripheral duct surrounding an exhaust valve seat and a peripheral duct surrounding an inlet valve seat communicating by means of a connecting duct; the cylinder head including a first coolant inlet, a second coolant inlet, and an outlet for heated coolant, the second inlet communicating with the connecting duct.

Abstract: A temperature control valve 10 for regulating the flow of coolant 15 in an automotive cooling system 11 that includes an engine 12 and a radiator 14. The temperature control valve 10 includes a valve body 40 having an inlet 42 and an outlet 46, a first valve assembly 100 that is movable between a closed position and an open position, and a chamber 74 that is adjacent to the first valve assembly 100. In the closed position of the first valve assembly 100, the inlet 42 of the valve body 100 is not in fluid communication with the outlet 46 of the valve body 100. In the open position of the first valve assembly 100, the inlet 42 of the first valve assembly 100 is in fluid communication with the outlet 46 of the first valve assembly 100. Fluid pressure within the chamber 74 is operable to move the first valve assembly 100 between the open position and the closed position.

Abstract: An air-cooled general-purpose engine includes: a cooling fan fixed to one end portion, protruding outward from one end wall of an engine main body, of a crankshaft; and a shroud which is mounted to the engine main body, and which defines a cooling-air path between the shroud and the one end wall, the cooling-air path guiding a cooling air blown under pressure from the cooling fan. The air-cooled general-purpose engine includes: an oil pump which pumps up an oil from an oil reservoir; and an oil-supply path which is formed in the one end wall, facing the cooling-air path, of the engine main body, and configured to guide the oil discharged from the oil pump to a valve operating chamber in a head portion of the engine main body, and a jet for jetting the oil is provided in an opening of the oil-supply path, the opening being open to the valve operating chamber.

Abstract: A firing deck (16) for an engine crankcase includes a firing side surface (35) and a coolant side surface (34). A plurality of cylinder bores (18) are disposed through the firing deck (16) from the firing side surface (35) to the coolant side surface (34). The cylinder bores (18) form a centerline defining an intake side (26) of the firing deck (16) and an exhaust side (28) of the firing deck. A plurality of bosses (30) through the deck (16) from the firing side surface (35) to the coolant side surface (34) are disposed around each cylinder bore (18). A plurality of anti-distortion projections (36, 136) are disposed on the coolant side surface (34) of the firing deck (16) and provide the firing deck with a varied thickness. The anti-distortion projections (36, 136) are disposed on both the intake side (26) and the exhaust side (28) of the firing deck (16).

Abstract: In a method for casting a cylinder head of a piston engine in a region of cooling channels for valve seat rings, a separate core is provided for defining cooling channels, and the cooling channel core is mounted in a bottom plate of a casting mold at various points thereof. The cooling channels for the valve seat rings have a cooling channel region formed by two interconnected rings and at least one cooling fluid supply channel and at least one cooling fluid drain channel. The two rings are disposed at a distance from the valve seat rings, adjacent to them.

Abstract: The invention relates to a cylinder head (1) for a liquid-cooled internal combustion engine with several cylinders, comprising at least one intake port (5) and at least two exhaust ports (4) per cylinder (1), at least one first cooling chamber (2) adjacent to a fire deck and at least one second cooling chamber (3) adjacent to the first cooling chamber (2), with the second cooling chamber (3) extending over several cylinders. In order to improve cooling in the areas subjected to great thermal stress it is provided that at least one first cooling chamber (2) is provided per cylinder and the first cooling chambers (2) of two adjacent cylinders are separated from one another, with each first cooling chamber (2) comprising at least one first opening (7) and at least one transfer opening (8) to the second cooling chamber (3), and the first cooling chamber (2) is flowed through between the first opening (7) and the transfer opening (8) substantially in the longitudinal direction of the cylinder head (1).

Abstract: A cylinder head includes a lifter guide boss part, a concave relief groove portion and a guide portion. The lifter guide boss part defines a lifter bore arranged to slidably support a valve lifter. The concave relief groove portion has a predetermined width and a predetermined depth formed on the lifter guide boss part in a position corresponding to a rotation direction of a cam to avoid an interference between the cam and the lifter guide boss part. The relief groove portion includes a pair of groove side surfaces and a groove bottom surface with a pair of corner sections being formed between the groove bottom surface and the side groove surfaces. The guide portion protrudes from the groove bottom surface in a sliding direction of the valve lifter to slidably guide the valve lifter. The guide portion is spaced apart from the corner sections of the relief groove portion.

Abstract: A length of a partition of an intake port is set such that the ratio between the length of the partition and the distance between the centers of adjacent intake valves is not less than 0.45 nor more than 0.72. An injector is attached on the upper side of a throttle body. The angle ? at which the injector is attached is set to be not less than 42 degrees nor more than 55 degrees. The injection starting timing of the injector is set within the periods in which the intake valves are closed.

Abstract: A control valve (10) for a fluid circulation circuit comprises a body (12) which is equipped with a fluid inlet (18) and with at least two fluid outlets (20, 22, 24) and which delimits a housing of revolution for an adjusting element (26) able to rotate about an axis of rotation (XX) and to adopt various angular positions to control the distribution of fluid through the outlets. The adjusting member (26) is surrounded by a sealing ring (42) in the form of an open annulus, which rotates as one with the adjusting member and is arranged with a small clearance around the adjusting member, this allowing the sealing ring to be pressed firmly internally against a side wall (16) into which the fluid outlets (20, 22, 24) open with a view to ensuring sealing under the action of the pressure of the fluid. Application in particular to motor vehicle fluid circuits.

Abstract: A cooled valve seat ring for a cylinder head of an internal combustion engine, having a valve seat part, wherein the cooled valve seat ring comprises a sheet-metal cooling channel consisting of a thin sheet of steel and which is connected with a coolant circuit via bores which serve as inflow and outflow for a coolant, wherein the cooled valve seat ring is connected with the cylinder head material by casting technology. In one embodiment, there can be a cooled valve seat ring that is connected with a cylinder head material via a laminate casting process. There can also be a cooled valve seat ring that has an alfin layer for a connection with the cylinder head material. In addition, the cooling channel can be welded onto or soldered onto the valve seat part. Furthermore, the sheet-metal cooling channel can be connected with the valve seat part so as to form a gas-tight seal.

Abstract: The invention relates to a valve seat ring, which is easy to produce (2). The cooled valve seat ring comprises a cooling channel (4) which consists of a thin sheet of steel.