Abstract: In one aspect, described is a rotor of a rotary internal combustion engine, including a phasing gear with an annular meshing section including a plurality of radially inwardly oriented teeth and an annular attachment section connected to the meshing section and coaxial therewith, the attachment section being offset axially inwardly from the teeth and having at least a portion thereof located radially inwardly of the teeth, and a fastener apparatus connecting the phasing gear to the rotor body, the fastener apparatus engaging the rotor body radially inwardly of the teeth.

Abstract: A compound engine system comprising a rotary engine having a volumetric compression ratio lower than its volumetric expansion ratio, and a recess defined in the peripheral wall of the rotor in each of the chambers having a volume of more than 5% of the displacement volume of the chamber. The expansion in the turbine section compensates for the relatively low expansion ratio of the rotary engine.

Abstract: A turbine engine turbine blade of ceramic matrix composite. The root of the blade includes a single densified fiber preform including at least one recess made by machining, each point of the root of the blade being situated at a distance from a free surface of the root that is no greater than twice the maximum penetration distance into the preform of densification gas for densifying the preform, and the distal portion of the root of the blade includes a distal wall that is continuous and in a single piece.

Abstract: A rotor of a rotary internal combustion engine, with each of the end faces having at each of the apex portions a recess defined therein in communication with the at least one apex groove, an end seal received in the recess in sealing engagement with the apex seal of each of the at least one apex groove, a first seal member in sealing engagement with the end seal and with the face seal of the face groove defined between the apex portion and a first one of the adjacent apex portions, and a second seal member in sealing engagement with the end seal and with the face seal of the face groove defined between the apex portion and a second one of the adjacent apex portions.

Abstract: A rotor of a rotary internal combustion engine, including an annular oil seal assembly snugly received within each oil seal groove, each oil seal assembly including a seal ring retaining first and second axially spaced apart annular sealing elements in substantial radial alignment with one another, the seal ring radially pressing each of the sealing elements in sealing engagement with a respective surface in the groove in opposite directions from one another, and a spring member biasing the seal ring axially away from the end face.

Abstract: A compact, high output free-piston engine is described. The engine can be configured in radial and other configurations to increase energy density. The engine can comprise one or more pairs of opposed pistons. One piston can be used to derive work via internal combustion or an external heat source. The opposing piston can be disposed in a cylinder of fixed or variable volume to act as an air spring. In the configuration, the two pistons can act as a spring-mass system with a natural, or resonant, frequency. The one or more pairs of pistons can be coupled to a driveshaft using a one-way clutch to convert the reciprocal translations of the two pistons into rotary movement. The engine can be coupled to an advanced, highly efficient electrical generator to provide for the efficient localized production of electricity.

Abstract: Gas turbine engine systems and related methods involving thermally isolated retention are provided. In this regard, a representative method for attaching a gas turbine engine component includes using a fastener, varying in diameter along a length thereof, to prevent a portion of a component from being crimped between surfaces to which the component is attached such that the component moves relative to the surfaces responsive to thermal cycling of a gas turbine engine of which the surfaces and the component are constituent parts.

Abstract: A lock assembly includes a lock body with an undercut slot which receives a retaining wire of a polygon shape.

Abstract: A disclosed fixture for assembling a stator vane assembly for a gas turbine engine includes an outer locating ring including a plurality of outer locating pins defining a position for each of a plurality of vanes relative to an outer fairing and an inner locating ring including a plurality of inner locating rings defining a position of each of the plurality of vanes relative to an inner fairing. A clamp section includes a clamp portion and a clamp pin that define an angular orientation of each of the plurality of vanes relative to each of the inner and outer fairings, and an inner locating section supporting a plurality of radial locating pins defining a radial position of each of the plurality of vanes relative to the inner and outer fairings.

Abstract: A method of manufacturing a cylinder block for a multi-cylinder engine is disclosed herein. The cylinder block includes a crankcase and cylinder bores disposed therein separated by cylinder walls. The crankcase is adapted to receive a crankshaft and includes crank chambers disposed therein separated by partition walls. Each of the crank chambers of the crankcase corresponds to one of the cylinder bores of the cylinder block. The cylinder bore side of each partition wall has a honing runoff portion thinner in section than the crankshaft side thereof such that a step face results in the partition walls. Further, a runoff groove is formed in the partition walls of the crank chambers, and also a communication hole is formed at least partially within the runoff groove in at least one of the partition walls to enable communication between crank chambers.

Abstract: A rotary vane engine includes a sealing area that prevents or reduces carry-back between portions of the rotary vane engine. The rotary vane engine includes a stator housing having a stator wall with a first portion and a second portion. The first portion may be formed with a curvature that substantially matches the curvature of a rotor and provides the sealing. The rotary vane engine may include a first insert member for allowing adjustment of a fluid manipulation ratio (compression or expansion).

Abstract: This rotary engine configuration combines the four cycles required to produce power, thrust, exhaust, intake, and compression which are merged into a single cycle per revolution. Most conventional engine designs need two revolutions. This requires the mechanical functions to produce power simultaneously; consequently, the parts are performing several functions at the same time. So, only very few parts are needed. The rotor is the big worker. Combustion turns the rotor power cog one way, while the exhaust gases go the opposite way to escape through an opening directly behind the power cog, into the open air. In this concept, where many power generating functions are going on at the same time, only one moving assembly is needed. Fewer parts used translate into the many benefits described in the claims. The fact that 345 degrees pressure differential are being applied to the power cog is doing work. This work produced during the 345 degrees maximizes more fuel economy compared to conventional engines.

Abstract: A restoration process for restoring surface porosity defects resulting from the casting process in metal cast products. The areas of a cast product having surface porosity defects are identified and the areas not containing surface porosity defects are masked using an adhesive, reusable, rubberized mask. The masked surface is subsequently cleaned and a metal spray is applied to the surface porosity defects. The mask is removed and the restored surface porosity defects are hand finished to create a cast product having less than 0.05% surface porosity.

Abstract: In a rotary piston engine in trochoidal design with a rotor housing, made of light metal, and with side parts, which are made of light metal, it is provided that the bearing bodies are connected in an area, in which the maximum gas pressures develop, by means of tie rods, which are oriented radially in relation to the bearing body, to a support element, which rests externally on the side parts and the rotor housing.