8298 results about "Cylinder head" patented technology

A HCCI engine includes a cylinder block with a cylinder head closing off a cylinder, a power piston slidably contained within the cylinder, and a boost piston for initiating timed combustion of fuel within a combustion chamber. The boost piston is housed within a wall of the combustion chamber such that when the boost piston moves from a base position to an extended position, the heat increase within the combustion chamber is sufficient to cause fuel within the combustion chamber to ignite.

An engine cylinder head has an exhaust manifold cast in the cylinder head. A turbocharger with a turbine body is adapted to mount directly to an exhaust outlet mounting face of the exhaust manifold. A dual level water jacket within the cylinder head has separate coolant feeds for upper and lower cooling jackets. The cooling jackets extend above and below the exhaust outlet and are connected inward of the exhaust mounting face to reduce metal temperatures of the mounting face below those of the turbocharger exhaust inlet flange. Separate cores for the upper and lower jackets are connected at coolant inlet and outlet locations at opposite ends. Intermediate core print connectors form controlled flow passages between the upper and lower jackets and exhaust ports in the cylinder head and integrated manifold. The improved cooling in these areas lowers operating temperatures in the cylinder head and obviates the need for a separate exhaust manifold.

In an internal combustion engine for a motor vehicle, having a cylinder head and an engine block, each with a coolant inlet port and a coolant outlet port which is common to the cylinder head the engine block, a main coolant pump having an intake side connected to the coolant outlet port and a pressure side connected to a first control valve via which coolant reaches the inlet port of the cylinder head and the inlet port of the engine block depending on the temperature of the coolant, and to a method for operating such an internal combustion engine, wherein the main coolant pump is selectively actuated to pump the coolant through at least one of the cylinder head and the engine block or is shut down depending on the engine operating state.

The fuel injection device provides a particularly effective sound-decoupling construction. The fuel injection device has at least one fuel injection valve, a receptacle bore for the fuel injection valve in a cylinder head, and a fuel distributor line having a fitting in which the fuel injection valve is placed in partially overlapping fashion. A connecting element is situated in the receptacle bore such that the fuel injection valve is held in the connecting element such that the fuel injection valve and the connecting element are held so that they do not contact any surfaces or walls of the receptacle bore of the cylinder head that do not run axially parallel to the fuel injection valve. For this purpose, the connecting element is attached immediately on the fitting of the fuel distributor line.

The fuel injection valve is particularly well-suited for use in fuel injection systems of mixture-compressing externally ignited internal combustion engines.

An engine is provided which includes various precise configuration parameters, including dimensions, shape and/or relative positioning of the combustion chamber features, resulting in a combustion process minimizing NOx emissions and particulates. The combustion chamber includes one or more of the following: a spray angle relative to an inner bowl floor angle; a vertical distance from the tip of the piston bowl to the injection orifices; a number of injection orifices; a swirl ratio; a vertical distance from the injection orifices to an inner face of the cylinder head; a radius of curvature of an outer bowl section; chamfer with dimensional parameters; and a transition radius.

This invention overcomes the disadvantages of the prior art by providing a power generating system particularly suitable for field use in remote locations, which is fuel-efficient, relatively quiet, tolerant of dust, capable of operating on low grade logistics and diesel-like fuels and capable of generating between 500 W and 2 KW of continuous electrical power. This generator employs a miniature internal combustion engine/generator (MICE) having a piston moving within a cylinder arranged for two-cycle operation, and an interconnected, axially arranged piston shaft that oscillates an alternator coil within a magnetic core. The piston shaft is opposed by a strong, multiple-helix spring. The cylinder head, in which the piston operates, is cooled by moving (electrically pumped) fluid in a cooling head, or by another heat-transfer mechanism. The MICE generator's intake arrangement includes a preheater heated by a heated fluid flow thereon. The MICE generator is vibration-isolated using a base that supports the MICE on a plurality of soft coil springs. The MICE generator is encased in an acoustic enclosure having a shell composed of sheet metal or another stiff material extending from the base plate and being covered by a top side. Holes in the enclosure top are covered by porous discs that allow exhaust gasses from the internal muffler to pass therethrough. The acoustic enclosure resides in a large, typically portable, external package enclosure.

An internal combustion engine of either two-cycle or four-cycle construction including a block having at least one cylinder bore therein having sidewalls carrying a liner of a structural fiber reinforced ceramic matrix composite material disposed in sealed fiber reinforced sliding relationship within the cylinder bore, and a cylinder head sealing atop end of the cylinder bore to form a closed combustion chamber in combination with the piston. The cylinder head also has the structural fiber reinforced ceramic matrix composite material disposed on an inner surface thereof facing the combustion chamber. The preferred engine is a two-cycle engine having an externally scavenged intake system and an oil sump lubricating system thereby eliminating the need to separately mix or inject lubricating oil. Higher operating temperatures and closer tolerances allow higher fuel efficiency and less pollutant production. A preferred structural fiber reinforced ceramic matrix composite material and the method of making same is also disclosed.

A valve arrangement for reciprocating machine, where the arrangement (1) comprises an in-valve (18) and an out-valve (19), each valve (18), (19) being a springloaded one-way valve designed to open for flow when the pressure differential in the direction of flow provides a force that exceeds the spring tension, wherein the valves (18, 19) are mounted in a casing (8) that forms or is connected to the cylinder head of the reciprocating engine (2). The in-valve (18) and the out-valve (19) are mounted in a sleeve (16) designed to be fitted in a bore (9) in the casing (8), and where fluid may flow to the sleeve (16) from an inlet (11) in the casing (8) and into the sleeve (16) via the in-valve (18), and where the sleeve (16) is provided with at least one perforated area where fluid may flow radially out of or into the sleeve (16) via holes (50, 51), thereby flowing to or from a passage (14, 15) that forms a perpendicular or near perpendicular connection with the bore (9).

An intake manifold includes an upper shell, a lower shell, and a middle shell that interconnects the upper and lower shells. The lower shell has a plurality of longitudinally spaced shell ports. Each shell port is adapted for installation over a corresponding intake port for an engine cylinder head. The upper shell has a plurality of runners that are used to guide air to the shell ports. The middle shell has a plurality of channels that interconnect the runners and the shell ports such that air can flow through the runner to the cylinder intake port. Fuel injector pockets are formed within the upper, middle, and lower shells with each of the pockets having an injector opening in communication with the corresponding shell port. An internal fuel rail, formed between the upper and middle shells, supplies fuel to each of the injector pockets. A fuel injector is installed into each injector pocket such that the injectors are substantially enclosed within the manifold. An internal wire harness rail, formed between the upper and middle shells, supports a wire harness that electrically connects each of the injectors to a power supply.

A tool for metal-cutting machining of a surface of an opening particularly of a valve seat in a cylinder head of an internal combustion engines. The tool has a cutter tip with at least one geometrically defined cutting edge. The cutter tip rests on two supporting regions in the tool which are arranged at an angle α, and an angle-bisecting line runs essentially perpendicularly with respect to the active cutting edge which then is removing chips from the valve seat. A claw holds the cutting tip to the tool end. Coolant and lubricant are supplied through an outlet from the claw.

An air driven hydraulic pump includes two opposed cylinders to either side of a center section. Two pneumatic pistons are slidable in the opposed cylinders and are coupled with one another by a common shaft extending through the center section. The pneumatic pistons ride in the opposed pneumatic cylinders and include hydraulic plungers extending therefrom. Cylinder heads integral with the cylinders provide hydraulic cylinders aligned with the hydraulic plungers. An air valve delivers pneumatic pressure to alternate sides of both pneumatic pistons such that the forces on the pistons are additive alternately in each direction.

A blow-by gas collection passage (91) extends in a cylinder block (1) and a cylinder head (3). A crank chamber (61) is connected to an oil separator (92) through the blow-by gas collection passage (91). A cutout portion is formed in an upper end portion of a wall portion (97) of the blow-by gas collection passage (91), and the oil separator (92) contacts an upper surface of the cylinder head (3) to form a connection portion (98) through which the blow-by gas collection passage (91) is connected to a cam chamber (3A). Thus, new air in the cam chamber (3A) flows into the blow-by gas collection passage (91) at an inlet portion of the oil separator (92) through the connection portion (98) to dilute the blow-by gas.

An overhead rotary valve fitted into a cylinder head with diametrical polygonal openings formed therein for use in combination with an internal combustion engine, driven to bring intake and exhaust ports into and out of alignment with passages leading to and from the combustion chamber. Sleeve bearings are fitted in the cylinder head that provide surface sealing, and annular sealing members prevent the air/fuel mixture or exhaust gases from flowing into regions intermediate ports and individual cylinders. Utilizing this overhead rotary valve and associated seals and bearings increases the efficiency and performance of an internal combustion engine. The overhead rotary valve rotating, at one quarter the speed of the crankshaft, minimizes wear and noise levels, self cleans the ports, allows the engine to operate at higher rpm and imparts proper opening and closing of passages at the proper sequence of valve timing without concern of valve float. The instant invention removes the need for reciprocating intake and exhaust valves, camshafts, rocker arms, lifters, push rods, valve guides and retainers, and other related hardware for actuation, significantly increasing the reliability and effectiveness of the internal combustion engine, while reducing overall manufacturing costs.

A laser-clad processing apparatus of the present invention is one which is for carrying out laser-clad processing onto a valve-seat portion of a cylinder head, and is characterized in that it comprises cylinder-head holding means (1) for holding a cylinder head (H) in an inclining manner so that the central axial line of a valve seat becomes the vertical direction, a laser-processing head (2) for irradiating a laser beam onto a process part of the valve seat and at the same time discharging a powdery material to this process part, rotary means (3) which rotates around the central axial line of the valve seat in such a state that the laser-processing head is inclined with respect to the vertical direction, and powdery-material supply means (4) for supplying the powdery material to the laser-processing head.

Moreover, a laser-clad processing method of the present invention is characterized in that it fixes the cylinder head (H), and forms a clad layer while rotating the laser-processing head (2), which emits the laser beam with respect to the valve-seat portion of the cylinder head and discharges the powdery material, around the axial center line of the valve seat.

An oil separator provided in combination with a cylinder head cover of an internal combustion engine. The oil separator includes a separator cover fixed to an inner surface of the cylinder head cover defining a space extending in a first direction perpendicular to axis of a camshaft in plan, between the separator cover and the cylinder head cover. The separator cover has an opening through which the space is opened to a valve operating chamber. A partition wall is provided to define in the space an inlet-side separator chamber and an outlet-side separator. The partition wall extends in a second direction parallel with the axis of the camshaft and being formed with a plurality of fine passages. Additionally, a plurality of projection walls project from a part of the inner surface of the cylinder head cover which faces the valve operating chamber through the opening.

In a cylinder head, a cooling water passage with a circular shape (an elliptical shape) in cross section in radial direction is formed at an area (lower layer deck) closer to a combustion chamber than a water jacket in which a cooling water flows. The cooling water passage of the cylinder head is formed by casting by providing a hollow core in a mold and removing the hollow core.

A cylinder head cooling structure and an oil temperature control system are provided for an internal combustion engine having a plurality of cylinders, each having a plurality of intake ports and a plurality of exhaust ports. The engine includes cooling oil jackets surrounding the spark plugs in the cylinder head, a thermostat attached to the front surface of the crankcase independently of an oil filter, and an oil temperature sensor disposed on a rear face of the cylinder block above the crankcase in an oil supply path formed on the cylinder rear face for supplying oil to the oil jackets. Oil passages conducting oil into the oil jacket are provided between two separate parts of a bifucated intake port and between two separate parts of a bifurcated exhaust port, and only cooling system oil reaching high temperatures is allowed to flow through the thermostat, thereby improving temperature control response.