Abstract: In accordance with one aspect of the present disclosure, a turbocharger includes a compressor having a compressor wheel, a turbine provided within a housing, and an exhaust gas recirculation (EGR) flow path. The EGR flow path includes a first fluid connection in the housing and located in proximity to the turbine, a second fluid connection located in proximity to a trailing edge of the compressor wheel, an EGR control valve disposed between the first fluid connection and the second fluid connection, the EGR control valve configured to selectively operate the turbocharger in a low-heat mode having an EGR up to 50% and an operational mode having an EGR rate typically less than 35%.

Abstract: In accordance with one aspect of the present disclosure, a turbocharger includes a compressor having a compressor wheel, a turbine provided within a housing, and an exhaust gas recirculation (EGR) flow path. The EGR flow path includes a first fluid connection in the housing and located in proximity to the turbine, a second fluid connection located in proximity to a trailing edge of the compressor wheel, an EGR control valve disposed between the first fluid connection and the second fluid connection, the EGR control valve configured to selectively operate the turbocharger in a low-heat mode having an EGR up to 50% and an operational mode having an EGR rate typically less than 35%.

Abstract: In accordance with one aspect of the present disclosure, a turbocharger includes a compressor having a compressor wheel, a turbine provided within a housing, and an exhaust gas recirculation (EGR) flow path. The EGR flow path includes a first fluid connection in the housing and located in proximity to the turbine, a second fluid connection located in proximity to a trailing edge of the compressor wheel, an EGR control valve disposed between the first fluid connection and the second fluid connection, the EGR control valve configured to selectively operate the turbocharger in a low-heat mode having an EGR up to 50% and an operational mode having an EGR rate typically less than 35%.

Abstract: In accordance with one aspect of the present disclosure, a turbocharger includes a compressor having a compressor wheel, a turbine provided within a housing, and an exhaust gas recirculation (EGR) flow path. The EGR flow path includes a first fluid connection in the housing and located in proximity to the turbine, a second fluid connection located in proximity to a trailing edge of the compressor wheel, an EGR control valve disposed between the first fluid connection and the second fluid connection, the EGR control valve configured to selectively operate the turbocharger in a low-heat mode having an EGR up to 50% and an operational mode having an EGR rate typically less than 35%.

Abstract: A wastegate assembly with a valve head moved linearly toward and away from a wastegate port via a valve stem. When the valve is in an open position the valve seat face of the valve head is spaced apart from the valve seat. When the valve is in a closed position the valve seat face of the valve head is secured against the valve seat. The wastegate assembly includes a sidewall surrounding the wastegate port elongated in the direction of valve movement. The contoured side wall widens going away from the valve seat. The minimum flow area through the wastegate port is controlled such that the flow is choked via the side wall rather than the valve curtain area. The contoured side wall can be recessed into the housing or extend from the housing.

Abstract: A variable turbine geometry (VTG) turbocharger (100) includes a VTG assembly (25) for controlling guide vanes (30) in combination with a wastegate assembly (60, 260) having a wastegate valve (62, 262) configured to control exhaust gas flow through a wastegate port (7) in the turbine housing (4) thereby selectively bypassing the turbine wheel (12). The guide vanes (30) are actuated continuously, while the wastegate valve (62, 262) only starts to open at a predetermined configuration of the VTG assembly (25) in which the guide vanes 30 are open to a set amount. For some exhaust gas flow rates, the guide vanes (30) and the wastegate valve (62, 262) are fully open at the same time. A common actuator (110, 50) controls both the guide vanes (30) and the wastegate valve (62, 262) of the wastegate assembly (60, 260).

Abstract: A plurality of guide vanes (34) in a variable turbine geometry turbocharger (10) regulates a flow of exhaust gas. The guide vanes (34) are selectively adjustable between an open position to allow the flow of exhaust gas to drive a turbine wheel (24) and a closed position to block the flow of exhaust gas. A first flow feature (58) is disposed on first (44) and second (46) edges of the guide vanes (34) to disturb the flow of exhaust gas to prevent leakage of exhaust gas around the first (44) and second (46) edges. A second flow feature (64) is disposed on front (60) and rear (62) surfaces of the guide vanes (34) to channel the flow of exhaust gas between adjacent guide vanes (34) when the guide vanes (34) are in the open position to prevent swirling and/or cross flow of the exhaust gas.

Abstract: A wastegate assembly with a valve head moved linearly toward and away from a wastegate port via a valve stem. When the valve is in an open position the valve seat face of the valve head is spaced apart from the valve seat. When the valve is in a closed position the valve seat face of the valve head is secured against the valve seat. The wastegate assembly includes a sidewall surrounding the wastegate port elongated in the direction of valve movement. The contoured side wall widens going away from the valve seat. The minimum flow area through the wastegate port is controlled such that the flow is choked via the side wall rather than the valve curtain area. The contoured side wall can be recessed into the housing or extend from the housing.

Abstract: An exhaust gas turbocharger with a wastegate port configured to permit some exhaust gas flow to exit a turbine volute upstream of the turbine wheel and enter a bypass channel thereby bypassing the turbine wheel, a valve with a valve head dimensioned to seat on a valve seat and to move between a seated position and an open position, the bypass channel having a sidewall contoured to surround the valve head as the valve head moves between the seated position and the open position, he bypass channel sidewall shaped so that a throat area (At) area between the bypass channel sidewall and valve head gradually increases as the valve head moves between the seated and the open position, such the bypass flow is controlled by the throat area (At) and not the area between the valve head and the valve seat.

Abstract: A variable turbine geometry (VTG) turbocharger (100) includes a VTG assembly (25) for controlling guide vanes (30) in combination with a wastegate assembly (60, 260) having a wastegate valve (62, 262) configured to control exhaust gas flow through a wastegate port (7) in the turbine housing (4) thereby selectively bypassing the turbine wheel (12). The guide vanes (30) are actuated continuously, while the wastegate valve (62, 262) only starts to open at a predetermined configuration of the VTG assembly (25) in which the guide vanes 30 are open to a set amount. For some exhaust gas flow rates, the guide vanes (30) and the wastegate valve (62, 262) are fully open at the same time. A common actuator (110, 50) controls both the guide vanes (30) and the wastegate valve (62, 262) of the wastegate assembly (60, 260).

Abstract: A wastegate assembly (12) having a valve (16) to control exhaust gas flow bypassing a turbine wheel of a turbocharger. The wastegate assembly (12) has a wastegate port (14) for flow bypassing the turbine wheel. The valve (16) has an arm (20) controlling a valve head (22) relative to the port (14) for selectively blocking and unblocking the port (14) to control flow. A valve seat (26) may surround the port (14) to be operable with the valve head (22) to selectively block the port (14). A contoured side wall (30) is disposed adjacent to the port (14) and extends from the turbine housing (10) so as to be radially offset from a valve margin (25). The contoured side wall (30) may have a concave portion (40) adjacent to the valve head (22) to help effectuate desired flow at specific valve opening angles.

Abstract: A plurality of guide vanes (34) in a variable turbine geometry turbocharger (10) regulates a flow of exhaust gas. The guide vanes (34) are selectively adjustable between an open position to allow the flow of exhaust gas to drive a turbine wheel (24) and a closed position to block the flow of exhaust gas. A first flow feature (58) is disposed on first (44) and second (46) edges of the guide vanes (34) to disturb the flow of exhaust gas to prevent leakage of exhaust gas around the first (44) and second (46) edges. A second flow feature (64) is disposed on front (60) and rear (62) surfaces of the guide vanes (34) to channel the flow of exhaust gas between adjacent guide vanes (34) when the guide vanes (34) are in the open position to prevent swirling and/or cross flow of the exhaust gas.

Abstract: The invention relates to wood preservation systems which employ impregnating agents comprising halogenated tannin extracts from plant species which are relatively more resistant to fungi, weathering, rotting, insect attack, etc. Materials contained within the tannin extracts are converted to halogenated substances which are absorbed by the wood species to be treated. The halogenated extract materials can be used with or without other treatment agents (e.g., fixatives or metal salts). Bromine is the preferred halogen material, with optimum treatment occurring when the bromine concentration in the extract exceeds about 2% (most preferably, about 4-5%).

Abstract: Apparatus for the abatement of noise from cooling fans primarily in computer and business equipment. Noise of mechanical origin is reduced by damping the fan casing, by mass-loading the casing (at low frequencies), by isolating the casing from its surrounds, and by absorbing some of the noise as it is radiated from the fan casing. The foregoing functions are accomplished by a three-part assembly comprising an elastomeric damping-absorption-isolation collar, a massive high inertia collar, and a secondary isolator, which are inserted between the fan and its supportive structure. The assembly also supports the fan without loose fasteners attached to the fan.

Abstract: Wood which is relatively poorer in connection with its ability to resist weathering, rotting, insect attack, etc., is made more resistant to such factors by a two-step process. The first step is to impregnate the poorer quality wood with an aqueous solution of tannin extract taken from a plant species which has superior weathering and other resistance properties. The wood treated with the tannin extract is then further treated with an aqueous solution of a fixative to prevent leaching of the extract during use of the wood, e.g., in exterior applications. The process of the present invention not only results in preservation of the wood, but can also be used for purposes of coloring the initial wood product. Abundant and relatively cheap woods can then be converted into wood products having qualities more closely like those of more expensive woods. In addition to the above-noted advantages, the present invention also uses treating substances which are non-hazardous and which are not damaging to the environment.