3388results about "Casings" patented technology

Various techniques are disclosed for improving airtight two-phase heat-transfer systems employing a fluid to transfer heat from a heat source to a heat sink while circulating around a fluid circuit, the maximum temperature of the heat sink not exceeding the maximum temperature of the heat source. The properties of those improved systems include (a) maintaining, while the systems are inactive, their internal pressure at a pressure above the saturated-vapor pressure of their heat-transfer fluid; and (b) cooling their internal evaporator surfaces with liquid jets. FIG. 43 illustrates the particular case where a heat-transfer system of the invention is used to cool a piston engine (500) by rejecting, with a condenser (508), heat to the ambient air; and where the system includes a heat-transfer fluid pump (10) and means (401-407) for achieving the former property.

The disclosure relates to reciprocating fluid working devices including internal combustion engines, compressors and pumps. A number of arrangements for pistons and cylinders of unconventional configuration are described, mostly intended for use in IC engines operating without cooling. Included are toroidal combustion or working chambers, some with fluid flow through the core of the toroid, a single piston reciprocating between a pair of working chambers, tensile valve actuation, tensile links between piston and crankshaft, energy absorbing piston-crank links, crankshafts supported on gas bearings, cylinders rotating in housings, injectors having components which reciprocate or rotate during fuel delivery. In some embodiments pistons mare rotate while reciprocating. High temperature exhaust emissions systems are described, including those containing filamentary material, as are procedures for reducing emissions during cold start by means of valves at reaction volume exit. Also disclosed are improved vehicles, aircraft, marine craft, transmissions and exhaust emission systems suited to the engines of the invention.

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 fuel injector is provided which has an injector body with a metallic tip having an outer surface. A non-metallic insulator, such as a ceramic, is attached to the tip and covers a portion of the outer surface. Injector tip overheating can be a problem, especially during sustained two-cycle boosted engine compression release braking. In addition, injector tip overheating can be a problem when an engine is experiencing simultaneous engine compression release braking and exhaust braking.

An engine includes a crankshaft, rotating about a crankshaft axis of the engine. A power piston is slidably received within a first cylinder and is operatively connected to the crankshaft via first linkage system. The power piston reciprocates through a power stroke and an exhaust stroke of a four stroke cycle during a single rotation of the crankshaft. A compression piston is slidably received within a second cylinder and operatively connected to the crankshaft via second linkage system. The first and second linkage systems share no common mechanical link. The compression piston reciprocates through an intake stroke and a compression stroke of the same four stroke cycle during the same revolution of the crankshaft. The power piston leads the compression piston by a phase shift angle that is substantially equal to or greater than zero degrees and less than 30 degrees.

A piston for an internal combustion engine of an automotive vehicle. The piston has a piston ring and a piston skirt section each of which has a sliding section in slidable contact with a cylinder bore section of a cylinder block in presence of a lubricating oil. The cylinder bore section is formed of eutectic or hyper-eutectic aluminum alloy. Additionally, a hard carbon thin film is coated on the sliding section of the piston and contains hydrogen atom in an amount of not more than 1 atomic %. Here, the lubricating oil contains at least one selected from the group consisting of ashless fatty acid ester friction modifier, ashless aliphatic amine friction modifier, polybutenyl succinimide, derivative of polybutenyl succinimide, zinc dithiophosphate, and derivative of zinc dithiophosphate.

An oil pan for an engine includes a body having a floor and side walls. The body has a plurality of baffles extending vertically from the floor and intersecting each other and the side walls in a manner to form four chambers. The baffles have openings to allow oil flow therethrough. One of the chambers acts as an oil pick-up chamber.

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.

An upper cylinder head (UCH) housing for use with a vehicle engine is provided. The UCH housing includes a cover body and a variable cam timing (VCT) valve body integrally formed with the cover body. The VCT valve body is configured to at least partially cover a VCT valve assembly coupled to the vehicle engine. The UCH housing further includes a plurality of cam caps integrally formed with the cover body. The plurality of cam caps is configured to receive at least a portion of a cam shaft for securing the cam shaft to a cylinder head.

The present invention relates to a valve cover assembly adapted to be secured to a cylinder head of a vehicle engine. The valve cover assembly includes a valve cover body formed from a first material and an attachment member formed from a second material and attached to the valve cover body.

Producing of near net shape carbon (optionally carbon-carbon composite) pistons and other artifacts by sintering (with or without carbon fibers, preferably pitch-based carbon fibers and most preferably blends of vapor grown carbon fibers(VGCF)) homogeneous powders derived from petroleum pitch. The powders preferably exhibit properties equal to or exceeding those of POCO AXF-5Q. Preferred specific technical steps are substantially as follows: 1. Individually prepare, by evaporation, heat treating and/or oxidizing of carbon-containing pitches, followed by oxidizing, comminuting and/or spray drying, to produce sinterable pitch powders (and optionally create uniform dryblends of pitch powder with various fractions of vapor-grown or other carbon fiber.) 2. Produce near net shape carbon-carbon artifacts, such as cup shapes which are convertible to internal-combustion (i-c) pistons with minimal machining, by pressing or injecting into molds, then sintering and carbonizing. Both uniaxially (e.g. injection molded) and isostatically compacted powder blends, can be employed. Related apparatus, compositions and artifacts are also taught.

A system and method for securing a fuel injector in an internal combustion engine include a clamp for securing adjacent injectors to a cylinder head. The clamp includes a central portion with a hole for receiving a fastener to secure the clamp to the cylinder head, and a pair of symmetrical crescent-shaped clamping forks forming a U-shaped opening to facilitate lateral sliding engagement with diametrically opposed flatted portions of corresponding fuel injectors. Each arm includes an arcuate pad that engages a corresponding shoulder of the fuel injector to provide an axial clamping force to the fuel injector. The distance between the distal ends of one fork and the semicircular portion of the opposite fork is selected to allow lateral sliding disengagement of the clamp from one of the adjacent injectors without rotation or removal of the other injector to facilitate servicing of individual injectors.

A damped steel baffle for an engine cam cover aids in separation of oil mist entrained in a flow of crankcase air vented through the cam cover, and directs the air to a PCV valve atop the cover. The baffle forms a channel for the air, and effectively absorbs noise generated within the cover. Oil droplets condense on channel and baffle surfaces, and drain to an engine oil sump. The interface between baffle and cam cover is sealed with a foam gasket layer or RTV sealant. The baffle is constructed of two metal layers joined together by a thin layer of viscoelastic adhesive that converts vibrational energy into heat to dampen resonant vibrations. Amplitudes of vibration are significantly lower than for plain steel baffles, hence lower sound radiation is achieved. The individual steel layers are 0.2 to 0.6 mm thick; the viscoelastic layer has a thickness up to 0.15 mm.

A homogenous charge compression ignition barrel engine includes an engine housing with a first and second end. An elongated power shaft is longitudinally disposed in the engine housing and defines a longitudinal axis of the engine. A plurality of cylinders surround the longitudinal axis with each cylinder having a closed end and an open end. Each cylinder has a central axis. The open ends of the cylinders are each generally directed toward the first end of the housing. An intake system is operable to introduce a combustible mixture of air and fuel into each of the cylinders. A track is disposed between the first end of the housing and the open ends of the cylinders such that a portion of the track is disposed generally in alignment with the central axis of each of the cylinders. The track has a cam surface that longitudinally undulates with respect to the open ends of the cylinders. A portion of the cam surface is disposed generally in alignment with the central axis of each of the cylinders. The track and the cylinders are rotatable with respect to each other such that the undulating cam surface moves with respect to the open ends of the cylinders. A piston is moveably disposed in each of the cylinders such that a combustion chamber is defined between the piston and the closed end of the cylinder. Each piston is in mechanical communication with the cam surface of the track such that as the cylinders and the track move with respect to each other, the pistons reciprocate within the cylinders. Each cylinder is operable to compress a combustible mixture until the mixture auto ignites, without the introduction of a spark.

An outboard motor comprises an internal combustion engine and a protective cowling that surrounds the engine. The cowling comprises at least an upper portion and a lower portion. The engine comprises a cylinder block that defines a cylinder bore. A cylinder head member is fixed at one end of the cylinder block and encloses one end of the cylinder bore. A crankcase member is fixed at the other end of the cylinder block and encloses the other end of the cylinder bore. The crankcase member forms a crankcase chamber. A piston is positioned within the cylinder bore. A crankshaft is rotably journaled in the crankcase chamber and is connected to the piston. The piston, the cylinder bore and the cylinder head together define a combustion chamber. The cylinder block, the cylinder head member and the crankcase member together defining an engine body. A first air intake conduit communicates with the engine and extends generally along a side of the engine body. The first air intake conduit communicates with an intake silencer located proximate the crankcase member. The engine further comprises a starter motor, an electronic control unit and a fuel supply system. The fuel supply system comprises a vapor separator and a fuel injector. The starter motor, the electronic control unit, the vapor separator and the fuel injectors are located in a space defined between the intake silencer, the first air intake conduit and the engine body.

An internal combustion engine is constructed to include a variable compression ratio mechanism. The mechanism has the following structure. An upper link has one end pivotally connected to a piston pin of a piston of the engine. A lower link is pivotally disposed on a crank pin of a crankshaft of the engine and has one part pivotally connected to the other end of the upper link. A control shaft extends substantially in parallel with the crankshaft. A control link has an end pivotally connected to the other part of the lower link. The other end of the control link is connected to the control shaft through an eccentric bearing structure, so that rotation of the control shaft about its axis induces a pivoting of the lower link about the crank pin varying the stroke of the piston.

An engine compartment cover for a work machine includes left and right-hand side covers for covering the sides of an engine, and a hood for covering the top of the engine. The engine compartment cover serves to enclose the engine and demarcate an engine compartment and is capable of suppressing the noise at the operator's ear level caused by the engine operating noise passing through the engine compartment cover as far as possible, whereby the level of quietness in the operator cab can be improved. In the engine compartment cover for a work machine, the hood has a box-type structure including an exterior top plate, side plates surrounding the whole perimeter of the exterior top plate, and a bottom plate opposed to the exterior top plate, and air inlet holes are provided in the side plates only, whilst an air outlet hole is provided in the bottom plate only, in such a manner that external air is drawn into the interior of the hood via the air inlet holes and air is introduced into the engine compartment via the air outlet hole.