Patent application number | Description | Published |
20120023931 | INSULATING SPACER FOR BALL BEARING CARTRIDGE - A turbocharger using a high speed rolling element bearing system is improved in desired speed and life by providing an insulating spacer, with a thermal conductivity lower than that of the material in the inner race of the REB, between the turbine-end of the inner race of the bearing system and the compressor-end face of the piston ring boss to impede the flow of heat from the turbine wheel to the inner race of the rolling element bearing. | 02-02-2012 |
20120033908 | INSULATING AND DAMPING SLEEVE FOR A ROLLING ELEMENT BEARING CARTRIDGE - A turbocharger uses a high speed rolling element bearing system. An exemplary rolling element bearing system includes a polymer sleeve to impede the flow of heat from the bearing housing into the outer race of the rolling element bearing system. In a second embodiment of the invention, the sleeve is supported by an oil film. In a third embodiment of the invention, the bearing cartridge is damped by a damping medium which also connects the bearing cartridge to the bearing housing. | 02-09-2012 |
20120045326 | SLIDING CLIP METHOD FOR ANTI-ROTATION AND THRUST CONSTRAINT OF A ROLLING ELEMENT BEARING CARTRIDGE - To solve both axial and rotational constraint problems in turbochargers with rolling element bearings (REBs), a REB cartridge is mounted to the bearing housing in a way that is not rigid, thus allowing for an oil damping film At the same time, the REB cartridge is held both axially and rotationally, so that the outer race does not rotate relative to the bearing housing. This dual purpose is achieved using a special dual mode sliding clip with at least one anti-rotation feature for engaging the bearing housing and at least one anti-rotation feature for engaging the REB cartridge, thereby axially locating the REB cartridge and preventing rotation of the outer race. | 02-23-2012 |
20130287552 | SPRING BIASED SEALING METHOD FOR AN ACTUATING SHAFT - The propensity for gas and soot leakage around a shaft, which extends through a bore which connects volumes of differing pressures, e.g., a turbocharger turbine housing and the ambient air, is minimized with the addition of a pair of seal rings axially biased by a spring to provide a continuous gas and soot seal. The spring may bias the seal rings apart from each other or towards each other. | 10-31-2013 |
20140003908 | GAS PRESSURE BIASED SEALING METHOD FOR AN ACTUATING SHAFT | 01-02-2014 |
20140348643 | SEMI-PERMEABLE MEDIA SEALING AN ACTUATING SHAFT - To impede soot leakage around a shaft which extends through a bore connecting volumes of differing pressures, e.g., a turbocharger turbine housing and the ambient air, a soot seal is provided to capture particulate matter while allowing the passage of gas. | 11-27-2014 |
20150097345 | SHAFT SEALING SYSTEM FOR A TURBOCHARGER - The propensity for gas and soot leakage around a shaft, which extends through a bore which connects volumes of differing pressures (e.g., a turbocharger turbine housing and the ambient air), is minimized by the addition of a complementary pair of narrowing sealing surfaces which provide a seal against the passage of said gases and soot. Such sealing surfaces can be frusto-spherical or frusto-conical. A biasing element is operatively positioned to exert biasing forces on one or more structures to maintain the sealing surfaces in engagement with each other to form a seal. | 04-09-2015 |
20150285132 | ACTUATOR ROD SEALING SYSTEM - Turbochargers use actuators to control wastegate valve or VTG vane position to control turbine wheel power. Components of such actuators are susceptible to damage when exposed to foreign liquids, solids and debris. To prevent such ingress, boot seals at the actuator shaft can provide a tortuous path for air aspiration and expulsion from the volume inside the actuator boot is provided at one or more interfaces in the actuator system. Such a path can also prevent ingress of undesired liquids, solid and debris, which can affect actuator performance material. In one arrangement, a tortuous pathway is provided between a boot seal holder and another actuator component. In another arrangement, a tortuous pathway is provided between the actuator shaft and an end portion of a boot seal. | 10-08-2015 |