Abstract:
An apparatus and system are disclosed for efficiently recirculating an exhaust gas in a combustion engine. The apparatus (100) includes an intake air conduit (204) that accepts and promotes mixing of an intake air stream (112) and an EGR stream (107). The intake air stream moves in the direction of the axis of the intake air conduit. The EGR stream enters the intake air conduit within a volute (205) of decreasing area curled about the outside circumference of the intake air stream. The rate at which the volute encourages mixing of the EGR stream with the intake air stream is affected by the rate at which the volute's area decreases as the volute curls about the inside circumference of the intake air conduit, and by the angle of entry (212) for the EGR stream as directed by the volute.
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:
An air compressed gun (210) is provided having a stock (211), multiple barrels (212), a trigger (213) and a manual air pump (214). A pressure chamber (216) and release valve (217) is coupled to each barrel which is controlled by the trigger.
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 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 embodiment is an apparatus for providing thermal management of a diesel aftertreatment device. The apparatus includes an intake throttle, at least one exhaust gas recirculation (EGR) valve coupled to the intake throttle, a turbine bypasss valve coupled to the at least one EGR valve and a control mechanism coupled to the intake throttle, the at least one EGR valve and the turbine bypasss valve for selectively actuating at least one of the valves based on an engine operation profile.
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 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 and system are disclosed for efficiently recirculating an exhaust gas in a combustion engine. The apparatus (100) includes an intake air conduit (204) that accepts and promotes mixing of an intake air stream (112) and an EGR stream (107). The intake air stream moves in the direction of the axis of the intake air conduit. The EGR stream enters the intake air conduit within a volute (205) of decreasing area curled about the outside circumference of the intake air stream. The rate at which the volute encourages mixing of the EGR stream with the intake air stream is affected by the rate at which the volute's area decreases as the volute curls about the inside circumference of the intake air conduit, and by the angle of entry (212) for the EGR stream as directed by the volute.