Abstract:
Die vorliegende Erfindung betrifft einen Kolbenring (10, 110, 210, 310, 410, 510, 610) für Kolben von Verbrennungsmotoren, mit einer Ringlauffläche (14), einem Ringrücken (11), einer oberen Ringflanke (12), einer unteren Ringflanke (13) sowie mit zwei durch einen Spalt beabstandeten Ringstoßenden (15). Erfindungsgemäß ist vorgesehen, dass in der Ringlauffläche (14) mindestens eine Öffnung (17, 117, 121, 217, 223, 325, 427) vorgesehen ist, die eine Fluidverbindung zwischen der Ringlauffläche (14) und dem Ringrücken (11) oder einer Ringflanke (12, 13) bildet.
Abstract:
This invention is related to an environment friendly, high speed internal combustion engine wherein the fuel is used at high efficiency by improving the connecting rod mechanism and by changing the piston structure and wherein the waste gas emission release is at a minimum level.
Abstract:
A movable wall member, in form of an exhaust valve spindle (1) or a piston (7) for an internal combustion engine, comprises a base portion (17, 20) of an alloyed steel having a carbon-content in the range from 0.15 to 0.35 % by weight, and an outer portion (14, 5) forming the surface of the wall member facing a combustion chamber. The outer portion is of a hot-corrosion-resistant alloy, which is nickel-based, chromium-based or cobalt-based. At least one buffer layer (18, 21) of an alloy is located in between the base portion and the outer portion. The alloy of the buffer layer is different from the alloyed steel of the base portion and different from the hot-corrosion-resistant alloy of the outer portion. The alloy of the buffer layer comprises from 0% to at the most 0.09% C in percent by weight of the buffer layer, and that the buffer layer has a thickness of at least 1.5 mm.
Abstract:
The invention relates to a turbo machine comprising a housing. Said turbo machine is designed especially as a turbo compressor for use at low temperatures, the housing preferably being made of a cold-resistant material that has a martensitic structure.
Abstract:
Bei einem mehrteiligen gekühlten Kolben (20) für einen Verbrennungsmotor, mit einem aus Stahl bestehenden Kolbenoberteil (1), das eine Verbrennungsmulde (3) und eine Ringwand (4) mit Ringpartie (11) umfasst, und einem Kolbenunterteil (2), das einen Kolbenschaft (9), Naben (12) zur Aufnahme des den Kolben (20) mit dem Pleuel verbindenden Kolbenbolzen sowie mit den Kolbenschaft (9) verbundene Nabenabstützungen (6) umfasst, soll eine kostengünstige Herstellung und gute Formstabilität dadurch erreicht werden, dass ein im Kolbenoberteil (1) eingeformter Kühlkanal (7) auf seinem Umfang verteilt zum Kolbenboden hin gerichtete Bohrungen (14) aufweist, wobei das zwischen den Bohrungen (14) vorhandene Kolbenmaterial Stützrippen (8) bildet, die radial zur Kolbenlängsachse (K) hin jeweils Abschnitte einer umlaufenden Ringrippe (5) bilden, dass das Kolbenunterteil (2) eine ringförmig umlaufende, mit den Nabenabstützungen (6) verbundene Tragrippe (10) mit einer Fügfläche aufweist, dass das Kolbenoberteil (1) und das Kolbenunterteil (2) mittels der Fügflächen von Ring- und Tragrippe (5, 10) unlösbar verbunden ist, und, dass der Kühlkanal (7) mittels einer Kühlkanalabdeckung (13) verschliessbar ist.
Abstract:
An improved sealing means for internal combustion engines comprising a combination of a metal primary sealing ring positioned substantially within a groove on the piston, and a compliant secondary sealing ring positioned in the groove behind the primary compression ring so that the compressed combustion gases force the compliant secondary sealing ring to form a seal between the groove and the primary sealing ring. In the preferred embodiment, the gapped ring is non-planar in order to provide effective sealing in a ported fixed-piston, rotating and translating cylinder engine such as the Deckard engine. Alternate embodiments include gapless rings with only a primary compression ring, and gapless rings with a compliant secondary sealing ring. An alternate embodiment is a single piece metal-capped compliant secondary sealing ring.
Abstract:
A piston assembly is configured for high compressive loading, or arduous duty cycle, such as in a two-stroke, compression-ignition (diesel), internal combustion engine, and incorporates a (part-) spherical or (part-) cylindrical bearing (18, 22, 23, 42), between a piston (10) and a connecting rod (50) small end (64); a (part) closed, unitary retaining ring (40), with a threaded circumference (44), for piston mounting; and an aperture, of internal profile (45) allowing its installation, by passage over the connecting rod; or, alternatively, as a partially-closed loop, with a peripheral slot, laterally to accommodate the connecting rod.
Abstract:
In a piston and connecting rod assembly, for an internal combustion engine, with a (part-)spherical, connecting rod small-end (64), entrained in a hollow piston body, by a retention ring (40), a chamber, serving as a localised reservoir (27), for lubricant and/or coolant (oil), is incorporated in the underside (18), of a piston crown (16), along with passages or grooves (26), communicating between the reservoir (27), and a coolant gallery (20) in the piston crown, for continuous interchange of lubricant (oil), between gallery (20) and reservoir (27), and thence lubricant (oil) return, over small end (upper and lower) part-spherical bearing surfaces (22, 23), to the retention ring (40), and through lubricant (oil) passages (46) in the ring, to an engine crankcase; affording an overall (re-) circulatory, lubricant (oil) feed and drainage path.