Patent application number | Description | Published |
20090077968 | Turbocharged Engine Control Operation with Adjustable Compressor Bypass - A method of operating an engine having a turbocharger and a high pressure EGR system is provided. In one example, a compressor of the turbocharger may have a recirculation passage with a recirculation valve coupled therein. The method may include during a first engine airflow condition: delivering at least some high pressure un-cooled EGR to the intake, downstream of the compressor, operating the throttle at a first throttle amount, and operating the compressor bypass valve at a first bypass amount to increase exhaust gas temperature; and during a second engine airflow condition higher than the first engine airflow: delivering at least some high pressure cooled EGR to the intake, downstream of the compressor, operating the throttle at a second throttle amount more open than the first amount, and operating the compressor bypass valve at a second bypass amount more closed than the first amount. | 03-26-2009 |
20090249773 | Diesel Turbine SCR Catalyst - A system for treating exhaust gases from an engine is described. The system includes, the exhaust gases routed from the engine to atmosphere through an exhaust passage, the system comprising: an injector directing a spray of reductant into the exhaust gases routed from the engine to atmosphere; an exhaust separation passage that separates an exhaust gas flow received from the engine into a plurality of separate exhaust gas flows; a plurality of oxidation catalysts, each of which receives one of the plurality of separate exhaust gas flows; a flow combining passage that receives the plurality of separate exhaust gas flows and combines them into a re-combined exhaust gas flow; a turbocharger that receives the re-combined exhaust gas flow from the flow combining passage; and a selective catalytic reduction catalyst positioned downstream of the turbocharger. | 10-08-2009 |
20090293477 | TRANSIENT COMPRESSOR SURGE RESPONSE FOR A TURBOCHARGED ENGINE - A method for responding to an existing or incipient surge condition of a turbocharger coupled to an engine of a motor vehicle is provided. The method comprises receiving a signal responsive to an operating condition of the turbocharger and adjusting one or more operating parameters of the motor vehicle when a power of the signal, integrated over a pre-selected range of non-zero frequencies, exceeds a pre-selected threshold. Other embodiments provide related systems for responding to an existing or incipient surge condition of a turbocharger. | 12-03-2009 |
20110173975 | Turbocharger - In one example, a turbocharger for an internal combustion engine is described. The turbocharger comprises a casing containing an impeller having a full blade coupled to a hub that rotates about an axis of rotation. The casing includes a bleed port and an injection port. The full blade includes a hub edge, a casing edge, and a first distribution of angles, each angle measured between the axis of rotation and a mean line at the hub edge at a meridional distance along the hub edge. The full blade includes a second distribution of angles, each angle measured between the axis of rotation and a mean line at the casing edge at a meridional distance along the casing edge. Further, various systems are described for affecting the aerodynamic properties of the compressor and turbine components in a way that may extend the operating range of the turbocharger. | 07-21-2011 |
20110247327 | Diesel Turbine SCR Catalyst - A system for treating exhaust gases from an engine is described. The system includes, the exhaust gases routed from the engine to atmosphere through an exhaust passage, the system comprising: an injector directing a spray of reductant into the exhaust gases routed from the engine to atmosphere; an exhaust separation passage that separates an exhaust gas flow received from the engine into a plurality of separate exhaust gas flows; a plurality of oxidation catalysts, each of which receives one of the plurality of separate exhaust gas flows; a flow combining passage that receives the plurality of separate exhaust gas flows and combines them into a re-combined exhaust gas flow; a turbocharger that receives the re-combined exhaust gas flow from the flow combining passage; and a selective catalytic reduction catalyst positioned downstream of the turbocharger. | 10-13-2011 |
20120198843 | REGENERATIVE ASSISTED TURBOCHARGER SYSTEM - A turbocharged internal combustion engine having an engine control unit and apparatus coupled to the turbocharger, to assist in acceleration of the turbocharger in response to an acceleration signal from the engine control system and to decelerate the turbocharger in response a deceleration signal from the engine control unit. The apparatus absorbs energy from the turbocharger in response to the deceleration signal from the engine control unit to decelerate the turbocharger. The apparatus includes one or more hydraulic wheels on the same shaft of, and between, the turbine and compressor of the turbocharger, the one or more hydraulic wheels being driven in response to the acceleration signal to assist in acceleration of the turbocharger or absorb energy from the turbocharger shaft in response the deceleration signal. | 08-09-2012 |
20130004292 | CONTROL STRATEGY FOR DECREASING RESONANCE IN A TURBOCHARGER - A method for operation of an engine including a turbocharger system is provided. The method includes adjusting turbocharger rotational acceleration or deceleration in response to one or more resonant frequencies. Additionally in some examples, the method may further include increasing turbocharger rotation in response to one or more resonant frequencies during a first condition, and increasing turbocharger deceleration in response to one or more resonant frequencies during a second condition, the second condition different from the first condition. In this way, it is possible to enhance the useful life cycle of the turbocharger and associated engine by limiting the operating time in a resonant frequency band. | 01-03-2013 |
20130013168 | TRANSIENT COMPRESSOR SURGE RESPONSE FOR A TURBOCHARGED ENGINE - A method for responding to an existing or incipient surge condition of a turbocharger coupled to an engine of a motor vehicle is provided. The method comprises receiving a signal responsive to an operating condition of the turbocharger and adjusting one or more operating parameters of the motor vehicle when a power of the signal, integrated over a pre-selected range of non-zero frequencies, exceeds a pre-selected threshold. Other embodiments provide related systems for responding to an existing or incipient surge condition of a turbocharger. | 01-10-2013 |
20130042608 | SLIDING VANE GEOMETRY TURBINES - Various systems and methods are described for a variable geometry turbine. In one example, a turbine nozzle comprises a central axis and a nozzle vane. The nozzle vane includes a stationary vane and a sliding vane. The sliding vane is positioned to slide in a direction substantially tangent to an inner circumference of the turbine nozzle and in contact with the stationary vane. | 02-21-2013 |
20140060009 | SECONDARY AIR INTRODUCTION SYSTEM AND METHOD FOR SYSTEM OPERATION - A vehicle system operation method is provided. The method comprises, during a first operating condition, increasing back pressure in a first exhaust conduit positioned upstream of a turbine and downstream of a first emission control device and during a second operating condition, reducing back pressure in the first exhaust conduit and flowing boosted air from downstream of a compressor into a second exhaust conduit positioned upstream of a second emission control device and downstream of the turbine. | 03-06-2014 |
20140360160 | VARIABLE GEOMETRY TURBINE VANE - Embodiments may provide variable geometry turbine, a nozzle vane for a variable geometry turbine, and a method. The variable geometry turbine that may include a turbine wheel and a plurality of adjustable vanes radially positioned around the turbine wheel. The turbine may also include a flow disrupting feature on one or more outside surfaces of one or more of the plurality of adjustable vanes. | 12-11-2014 |
20140377051 | TURBOCHARGER - Systems and methods are disclosed for a turbocharger compressor, the system comprising: an actuatable annular disk comprising choke slots therein; an outer annular disk comprising choke slots therein; and an actuator to rotate the actuatable annular disk relative to the outer annular disk to vary alignment of the choke slots of the actuatable annular disk and the outer annular disk. The actuator may be controlled by an engine controller responsive to operating conditions of the compressor and actuated to align choke slots. Alignment of the choke slots allows air to be drawn into the impeller effectively expanding the compressor flow capacity to prevent compressor choke. | 12-25-2014 |