Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
  • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
  • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
  • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
  • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
  • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
  • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
  • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
  • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
  • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
  • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
  • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
  • F01N3/106—Auxiliary oxidation catalysts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
  • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
  • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
  • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
  • F01N3/36—Arrangements for supply of additional fuel
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N9/00—Electrical control of exhaust gas treating apparatus
  • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D41/00—Electrical control of supply of combustible mixture or its constituents
  • F02D41/02—Circuit arrangements for generating control signals
  • F02D41/021—Introducing corrections for particular conditions exterior to the engine
  • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
  • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
  • F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D41/00—Electrical control of supply of combustible mixture or its constituents
  • F02D41/30—Controlling fuel injection
  • F02D41/38—Controlling fuel injection of the high pressure type
  • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
  • F02D41/402—Multiple injections
  • F02D41/405—Multiple injections with post injections
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
  • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
  • F01N2560/07—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas flow rate or velocity meter or sensor, intake flow meters only when exclusively used to determine exhaust gas parameters
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N2610/00—Adding substances to exhaust gases
  • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D2200/00—Input parameters for engine control
  • F02D2200/02—Input parameters for engine control the parameters being related to the engine
  • F02D2200/08—Exhaust gas treatment apparatus parameters
  • F02D2200/0802—Temperature of the exhaust gas treatment apparatus
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/10—Internal combustion engine [ICE] based vehicles
  • Y02T10/40—Engine management systems

Definitions

• the present disclosure relates to regeneration of diesel particulate filters, and more particularly to a system and method for regenerating a diesel particulate filter using a system that delivers hydrocarbons used during regeneration of the diesel particulate filter to either, or both, an engine cylinder as an in-cylinder post injection, or as an injection within the exhaust system upstream of a diesel oxidation catalyst and the diesel particulate filter.
• hydrocarbons typically in the form of diesel fuel
• injecting hydrocarbons directly into the exhaust system better utilizes the hydrocarbons, therefore, fewer hydrocarbons are required for DPF regeneration.
• it may be beneficial to provide hydrocarbons in the form of an in-cylinder post injection such that the hydrocarbons can react with the DOC to produce heat to allow regeneration of the DPF to occur.
• An example of an engine operating condition where in-cylinder post injection may be utilized include a low exhaust gas flow with low exhaust gas temperatures, as in those conditions hydrocarbons injected directly into the exhaust system may not mix sufficiently to allow the hydrocarbons to react with the DOC to produce heat, and the hydrocarbons may slip through the DOC and enter the DPF.
• One drawback of utilizing in-cylinder post injection is that some fuel does not ever enter the exhaust system, but may flow past piston rings and into a lubrication oil system of the engine, diluting the oil and potentially damaging engine components.
• Some engines are equipped to provide hydrocarbons both directly to the exhaust system, and via in-cylinder post injection, but these existing systems utilize separate control systems for each of the in-cylinder post injection and injections directly into the exhaust system, but these existing systems do not allow
• a method of providing hydrocarbons to an engine exhaust to for regenerating a diesel particulate filter within an exhaust system of a diesel engine comprises an electronic control module, at least one cylinder, and at least one fuel injector in fluid communication with the at least one cylinder, and a diesel oxidation catalyst within the exhaust system.
• a diesel particulate filter regeneration request is received from an electronic control module.
• Temperature of a diesel oxidation catalyst output is monitored with the electronic control module.
• the electronic control module determines a total amount of hydrocarbons required for diesel particulate filter regeneration.
• a first percentage of the total amount of hydrocarbons required for diesel particulate filter regeneration for delivery as an injection directly into an exhaust system upstream of a diesel oxidation catalyst is determined with the electronic control module.
• a second percentage of the total amount of hydrocarbons required for diesel particulate filter regeneration for delivery as an in-cylinder post injection is determined with the electronic control module.
• the first percentage of the total amount of hydrocarbons required for diesel particulate filter regeneration is injected into the exhaust system upstream of the diesel oxidation catalyst based upon an output of the electronic control module.
• the second percentage of the total amount of hydrocarbons required for diesel particulate filter regeneration for delivery as an in-cylinder post injection is injected based upon an output of the electronic control module.
• a method for providing hydrocarbons to an engine exhaust for regenerating a diesel particulate filter within an exhaust system of a diesel engine comprises an electronic control module, at least one cylinder, and at least one fuel injector in fluid communication with the at least one cylinder, and a diesel oxidation catalyst within the exhaust system. Temperature of a diesel oxidation catalyst output is monitored with an electronic control module. A total amount of hydrocarbons required for diesel particulate filter regeneration is calculated based upon the monitoring of the temperature of the diesel oxidation catalyst output. The total amount of hydrocarbons is injected into an exhaust system upstream of a diesel oxidation catalyst and at least one cylinder with a fuel injector as a post injection.
• a hydrocarbon injection system for an internal combustion engine having an exhaust system with a diesel particulate filter and a diesel oxidation catalyst
• the hydrocarbon injection system comprises an electronic control module, an engine speed sensor, an exhaust system, and at least one in-cylinder fuel injector.
• the electronic control module has a memory and a processor.
• the engine speed sensor is disposed in communication with the electronic control module.
• the engine torque output estimator is disposed in communication with the electronic control module.
• the exhaust system has a diesel oxidation catalyst, a diesel oxidation catalyst temperature sensor is disposed adjacent the diesel oxidation catalyst and is disposed in communication with the electronic control module, a diesel particulate filter is disposed downstream of the diesel oxidation catalyst, and an exhaust system hydrocarbon injector is disposed upstream of the diesel oxidation catalyst and is disposed in communication with the electronic control module.
• the at least one in-cylinder engine fuel injector is disposed within a cylinder of the engine, the fuel injector is disposed in communication with the electronic control module.
• the electronic control module determines a total amount of hydrocarbons required for diesel particulate filter regeneration based upon a diesel oxidation catalyst output temperature sensor.
• the electronic control module generates a single hydrocarbon injection output causing at least one of the in-cylinder fuel injector and the exhaust system hydrocarbon injector to inject hydrocarbons when a diesel particulate filter regeneration is required.
• FIG. 1 is a schematic diagram showing an engine having an exhaust system with an diesel particulate filter a diesel oxidation catalyst, and a hydrocarbon injector disposed in the exhaust system.
• FIG. 2 is a schematic diagram showing an electronic control module and sensors used to determine an amount of hydrocarbons required for a diesel particulate filter regeneration, and where the hydrocarbons should be delivered.
• FIG. 3 is a schematic diagram showing one method of providing hydrocarbons to an engine exhaust for regenerating a diesel particulate filter.
• Fig 4 is a schematic diagram showing another method of providing hydrocarbons to an engine exhaust for regenerating a diesel particulate filter.
• FIG. 1 shows an engine 10 having an exhaust system 12.
• the exhaust system 12 comprises a diesel oxidation catalyst (DOC) 14, a DOC temperature sensor 16, a diesel particulate filter (DPF) 18, and an exhaust system hydrocarbon injector 20.
• the engine 10 additionally has an electronic control module (ECM) 22, sometimes referred to as an engine control module, or an engine control unit.
• ECM 22 control operations of many aspects of the engine 10, such as fuel injection, emissions based engine settings, combustion based engine settings, and DPF regeneration, to name a few.
• the DOC temperature sensor 16 is in communication with the ECM 22
• the engine 10 additionally has a plurality of cylinders 24, each of which has a fuel injector 26.
• the fuel injector 26 are capable of performing multiple injection of fuel per cylinder for each combustion cycle, such as a pre-injection, a main injection, and a post- injection, where the main injection is the fuel injection to provide the required power output of the engine 10, while the pre-injection occurs before the main injection, and the post- injection occurs after the main injection.
• the engine 10 additionally has an engine speed sensor 28 that is also in communication with the ECM 22 and is used to determine the speed that the engine is running.
• the DOC 14 is located upstream of the both the DOC temperature sensor 16 and the DPF 18.
• the exhaust system hydrocarbon injector 20 is disposed upstream of the DOC 14.
• the exhaust system hydrocarbon injector 20 injects hydrocarbons, such as diesel fuel, into the exhaust system 12 in order to raise the temperature of the DOC 14, as well as exhaust within the exhaust system 12.
• the DPF may undergo regeneration when the temperature within the exhaust system 12 is above a certain level.
• the ECM 22 has a processor 30 and a memory 32.
• the ECM 22 receives inputs from a variety of sensors or controlled parameters such as output of the engine speed sensor 32, the DOC temperature sensor 36, an engine torque estimate 38 and intake air flow 40.
• the processor 30 may utilize the inputs to retrieve an output from a look up table stored in the memory 32, or may utilize the inputs to calculate an intermediate result that is compared with data stored in the memory 32 to generate output signals related to DPF regeneration.
• the processor 30 of the ECM 22 generates a total amount of hydrocarbons that are required for regeneration of the DPF 18.
• the total amount of hydrocarbons required for regeneration of the DPF 18 is driven by the input from the DOC temperature sensor 36. It is contemplated that the total amount of hydrocarbons required for regeneration of the DPF 18 may be stored in a lookup table in the memory 32, or may be calculated utilizing an algorithm stored in the memory 32 of the ECM 22.
• a percentage 44 of the total hydrocarbons required for DPF regeneration that will be injected into the exhaust system 12 by the exhaust system hydrocarbon injector 18 may be stored in a lookup table in the memory 32, or may be calculated utilizing an algorithm stored in the memory 32 of the ECM 22.
• the percentage 44 of the total hydrocarbons percentage of the total hydrocarbons required for DPF regeneration that will be injected into the exhaust system 12 by the exhaust system hydrocarbon injector 18 will vary based on engine operating factors such as engine speed input 34, engine torque estimate 38, and input on intake air flow 40.
• a percentage 46 of the total hydrocarbons required for DPF regeneration that will be injected into the exhaust system 12 by the fuel injectors 26 as an in-cylinder post injection may be stored in a lookup table in the memory 32, or may be calculated utilizing an algorithm stored in the memory 32 of the ECM 22.
• the percentage 46 of the total hydrocarbons percentage of the total hydrocarbons required for DPF regeneration that will be injected into the exhaust system 12 by the fuel injectors 26 as an in-cylinder post injection will vary based on engine operating factors such as engine speed input 34, engine torque estimate 38, and input on intake air flow 40.
• the total amount of hydrocarbons required for DPF regeneration 42 would be communicated to a sub-processor that calculates the percentage 44 of the total hydrocarbons percentage of the total hydrocarbons required for DPF regeneration that will be injected into the exhaust system 12 by the exhaust system hydrocarbon injector 18, and the percentage 46 of the total hydrocarbons percentage of the total hydrocarbons required for DPF regeneration that will be injected into the exhaust system 12 by the fuel injectors 26 as an in-cylinder post injection.
• the percentage 44 of the total hydrocarbons percentage of the total hydrocarbons required for DPF regeneration that will be injected into the exhaust system 12 by the exhaust system hydrocarbon injector 18 will be set to zero if a regeneration occurs in an engine of a vehicle that is stationary.
• filtering may be utilized to control the transition of changes in the percentage 44 of the total hydrocarbons percentage of the total hydrocarbons required for DPF regeneration that will be injected into the exhaust system 12 by the exhaust system hydrocarbon injector 18 and the percentage 46 of the total hydrocarbons percentage of the total hydrocarbons required for DPF regeneration that will be injected into the exhaust system 12 by the fuel injectors 26 as an in-cylinder post injection.
• Filtering is utilized such that a transient change in one of the inputs 34, 36, 38, 40 of the ECM 22 does not cause a sudden change in the percentages 44, 46, but that a sustained change to one of the inputs may change the percentages 44, 46.
• the filtering may be a dual hysteresis type of filtering such that a transition from not injecting hydrocarbons into the exhaust system 12 using the hydrocarbon injector 18 is initiated only after a certain first threshold is exceeded and that a transition to 100% of the hydrocarbons will be injected into the exhaust system 12 using the hydrocarbon injector 18 only after a second threshold is exceeded. Similarly, a transition from 100% of the hydrocarbons being injected into the exhaust system 12 using the hydrocarbon injector 18 will occur only after a third threshold is not exceeded, and a transition to 0% of the hydrocarbons being injected into the exhaust system 12 using the hydrocarbon injector 18 will occur only after a fourth threshold is not exceeded.
• filter may be utilized to provide smooth transitions in amounts of hydrocarbons delivered from the hydrocarbon injector 18 and the fuel injectors 26. Such filtering avoids abrupt transitions and provides more gradual changes the amount of hydrocarbons that are delivered to the exhaust system 12 by the hydrocarbon injector 18 and the fuel injectors 26 when a transition in the amount of hydrocarbons provided by the hydrocarbon injector 18 is required.
• FIG. 3 shows one method 50 of providing hydrocarbons to an engine exhaust for regenerating a DPF.
• the method 50 receives a DPF regeneration request, such as from a user, or generates a DPF regeneration request as shown at block 52.
• the method 50 monitors the temperature of the DOC with the ECM at block 54.
• a total amount of hydrocarbons required for DPF regeneration is determined at block 56.
• a first percentage of the total amount of the hydrocarbons required for DPF regeneration for delivery directly into the exhaust system is determined at block 58.
• a second percentage of the total amount of the hydrocarbons required for DPF regeneration for delivery as an in-cylinder post injection is determined at block 60.
• the total amount of hydrocarbons required for regeneration, as well as the first percentage and the second percentage may be contained in a lookup table in the memory 32 of the ECM 22, or may be calculated using the processor 30 of the ECM 22.
• the first percentage of the total amount of the hydrocarbons required for DPF regeneration is injected directly into the exhaust system at block 62.
• the second percentage of the total amount of the hydrocarbons required for DPF regeneration is injected as an in- cylinder post injection at block 64. It is contemplated that the injections of hydrocarbons 62, 64 may occur generally simultaneously, or that the in-cylinder post injection 64 may occur slightly before the direct injection into the exhaust system 62.
• FIG. 4 shows another method 70 of providing hydrocarbons to an engine exhaust for regenerating a DPF.
• the method 70 monitors the temperature of the DOC with the ECM at block 72.
• a total amount of hydrocarbons required for DPF regeneration is determined at block 74.
• the total amount of the hydrocarbons required for DPF regeneration is injected directly into the exhaust system and as an in-cylinder post- injection at block 76. It is contemplated that the injection directly into the exhaust system and the in-cylinder post injection will be occurring simultaneously in at least some operating conditions.
• control system may be implemented in hardware to effectuate the method.
• the control system can be implemented with any or a combination of the following technologies, which are each well known in the art: a discrete logic circuit(s) having logic gates for implementing logic functions upon data signals, an application specific integrated circuit (ASIC) having appropriate combinational logic gates, a programmable gate array(s) (PGA), a field programmable gate array (FPGA), etc.
• ASIC application specific integrated circuit
• PGA programmable gate array
• FPGA field programmable gate array
• control system can be stored on any computer readable medium for use by or in connection with any computer related system or method.
• a "computer- readable medium” can be any medium that can store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
• the computer readable medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium.
• the computer-readable medium would include the following: an electrical connection (electronic) having one or more wires, a portable computer diskette (magnetic), a random access memory (RAM) (electronic), a read-only memory (ROM) (electronic), an erasable programmable read-only memory (EPROM, EEPROM, or Flash memory) (electronic), an optical fiber (optical) and a portable compact disc read-only memory (CDROM) (optical).
• an electrical connection having one or more wires
• a portable computer diskette magnetic
• RAM random access memory
• ROM read-only memory
• EPROM erasable programmable read-only memory
• Flash memory erasable programmable read-only memory
• CDROM portable compact disc read-only memory
• control system can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions.

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• 2010
  • 2010-10-04 WO PCT/US2010/051271 patent/WO2012047192A1/en active Application Filing
  • 2010-10-04 EP EP10858215.6A patent/EP2625396A1/de not_active Withdrawn
  • 2010-10-04 CN CN2010800704724A patent/CN103237963A/zh active Pending
  • 2010-10-04 US US13/877,813 patent/US20130186072A1/en not_active Abandoned

Non-Patent Citations (1)

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