Abstract:
According to one exemplary embodiment, a virtual turbine speed sensor for a multi-stage turbocharger system (180) is disclosed. The multi-stage turbocharger system includes at least two sequential turbochargers (181, 182) each having a compressor (184, 186) and a turbine (183, 185). The virtual turbine speed sensor includes a compressor efficiency module (220) configured to estimate an efficiency of a first compressor of the at least two turbochargers, an inter-stage air temperature module (230) configured to estimate an inter-stage temperature of air between the at least two compressors, and a turbine speed module (240) configured to estimate a speed of a second turbine of the at least two turbochargers. The inter-stage temperature estimate of air is based at least partially on the efficiency of the first compressor and the speed estimate of the second turbine is based at least partially on the inter-stage air temperature estimate.
Abstract:
According to one exemplary embodiment, a virtual turbine speed sensor for a multi-stage turbocharger system (180) is disclosed. The multi-stage turbocharger system includes at least two sequential turbochargers (181, 182) each having a compressor (184, 186) and a turbine (183, 185). The virtual turbine speed sensor includes a compressor efficiency module (220) configured to estimate an efficiency of a first compressor of the at least two turbochargers, an inter-stage air temperature module (230) configured to estimate an inter-stage temperature of air between the at least two compressors, and a turbine speed module (240) configured to estimate a speed of a second turbine of the at least two turbochargers. The inter-stage temperature estimate of air is based at least partially on the efficiency of the first compressor and the speed estimate of the second turbine is based at least partially on the inter-stage air temperature estimate.
Abstract:
An apparatus, system, and method are disclosed for a single-actuated multi-function valve. In one embodiment, an apparatus (100) includes a primary fluid conduit (106), a secondary fluid conduit (114), and a valve (116). The primary fluid conduit extends from an exhaust manifold (104) to an outlet (108) through a high pressure turbocharger (110) and a low pressure turbocharger (112). The secondary fluid conduit extends from the exhaust manifold to the outlet through the low pressure turbocharger. The valve has two flow passages - the first flow passage (118) is a variable restriction within the primary fluid conduit, and the second flow passage (120) is a variable restriction within the secondary fluid conduit. Turning the valve one direction from a nominal position controls the flow ratios in the primary and secondary fluid conduits, while turning the valve in the other direction from the nominal position controls exhaust braking.
Abstract:
An apparatus, system, and method are disclosed for utilizing a diesel aftertreatment device (112) between the high pressure (110) and low pressure turbine stages (116) of a two-stage turbocharging system (100). The diesel aftertreatment device is connected in series between the high pressure turbine and the low pressure turbine such that the diesel aftertreatment device receives inflow from the high pressure turbine and provides outflow (114) to the low pressure turbine. A bypass mechanism (106) is provided such that at low engine speeds or loads, engine exhaust (104) flows through the high pressure turbine as well as the diesel aftertreatment device, but at high engine speeds or loads, the high pressure turbine and diesel aftertreatment device are bypassed, thereby allowing the engine (102) to operate more efficiently while still effectively removing pollutants from the engine exhaust.
Abstract:
An apparatus, system, and method are disclosed for reducing nitrogen oxide emissions in a combustion engine. In one embodiment, the method includes a shift detection module (202) determining an out of gear (OOG) indicator (204) for a manual transmission (104). The method further includes an engine speed module (214) determining an engine speed target (216) based on at least one operating condition (206) of the engine. The method continues with a load determination module (224) determining an engine load target (226) in response to the OOG indicator and an engine acceleration module (220) determining a desired net torque (222) based on the engine speed target and the engine load target. Finally, the method concludes with an emissions module (207) determining a minimum fuel target (208) based on the desired net torque and an actuation module (230) generating a fueling signal (242) to engage an engine fueling.
Abstract:
An apparatus, system, and method are disclosed for utilizing a diesel aftertreatment device (112) between the high pressure (110) and low pressure turbine stages (116) of a two-stage turbocharging system (100). The diesel aftertreatment device is connected in series between the high pressure turbine and the low pressure turbine such that the diesel aftertreatment device receives inflow from the high pressure turbine and provides outflow (114) to the low pressure turbine. A bypass mechanism (106) is provided such that at low engine speeds or loads, engine exhaust (104) flows through the high pressure turbine as well as the diesel aftertreatment device, but at high engine speeds or loads, the high pressure turbine and diesel aftertreatment device are bypassed, thereby allowing the engine (102) to operate more efficiently while still effectively removing pollutants from the engine exhaust.
Abstract:
An apparatus, system, and method are disclosed for preventing turbocharger overspeed in a combustion engine (102). The method includes determining (602) a turbocharger error term (202) as a difference between a nominal turbocharger maximum speed (206) and a current turbocharger speed. The method further includes determining (604) a turbocharger speed derivative with respect to time (204). The method includes calculating (606) a turbocharger control response based on the turbocharger error term (202) and the turbocharger speed derivative with respect to time (204). The turbocharger control response (210) may be a modified turbocharger maximum speed (210A) calculated by determining a reference speed multiplier based on the turbocharger error term (202) and the turbocharger speed derivative with respect to time (204), and multiplying the reference speed multiplier by the nominal turbocharger maximum speed (206). The method thereby smoothly anticipates turbocharger transient events, and prevents an overspeed condition of the turbocharger.
Abstract:
One embodiment is a unique system for controlling EGR. Other embodiments include unique apparatuses, systems, devices, hardware, software, methods, and combinations of these and other techniques for controlling EGR.
Abstract:
One embodiment is a unique system for controlling EGR. Other embodiments include unique apparatuses, systems, devices, hardware, software, methods, and combinations of these and other techniques for controlling EGR.
Abstract:
According to one exemplary embodiment, a virtual turbine speed sensor for a multi-stage turbocharger system (180) is disclosed. The multi-stage turbocharger system includes at least two sequential turbochargers (181, 182) each having a compressor (184, 186) and a turbine (183, 185). The virtual turbine speed sensor includes a compressor efficiency module (220) configured to estimate an efficiency of a first compressor of the at least two turbochargers, an inter-stage air temperature module (230) configured to estimate an inter-stage temperature of air between the at least two compressors, and a turbine speed module (240) configured to estimate a speed of a second turbine of the at least two turbochargers. The inter-stage temperature estimate of air is based at least partially on the efficiency of the first compressor and the speed estimate of the second turbine is based at least partially on the inter-stage air temperature estimate.