EP2495420A2 - Exhaust gas purification system for working machine - Google Patents
Exhaust gas purification system for working machine Download PDFInfo
- Publication number
- EP2495420A2 EP2495420A2 EP12150080A EP12150080A EP2495420A2 EP 2495420 A2 EP2495420 A2 EP 2495420A2 EP 12150080 A EP12150080 A EP 12150080A EP 12150080 A EP12150080 A EP 12150080A EP 2495420 A2 EP2495420 A2 EP 2495420A2
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- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- intake air
- controller
- engine
- differential pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
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- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
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- 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
-
- 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
- F02D2200/0812—Particle filter loading
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
- This application claims the priority of Japanese Patent Application
2011-004960 filed January 13, 2011 - The present invention relates to an exhaust gas purification system for a working machine such as a hydraulic excavator, which is provided with a filter for removing particulate matter (hereinafter abbreviated as "PM") contained in exhaust gas from an engine.
- As a conventional technology of this type, there is one disclosed in
JP-A-2005-307878 - According to the conventional technology having such a constitution as described above, a differential pressure ΔP1 and a determinative differential pressure ΔP2 are compared with each other at the regeneration determination unit of the controller and, when ΔP1>ΔP2, forced regeneration is determined to be needed. The differential pressure ΔP1 is determined by converting a detected differential pressure ΔP, which is detected at the differential pressure sensor, to a corresponding value at a standard temperature of exhaust gas from a correlation between a temperature of exhaust gas as detected at the exhaust gas temperature sensor and the standard temperature. The determinative differential pressure ΔP2, on the other hand, is a threshold level at the standard temperature, which corresponds to a flow rate of exhaust gas as computed at the computing unit of the controller.
- Forced regeneration is to inject fuel into exhaust gas from an engine such that using an oxidation reaction by an oxidation catalyst, the temperature of exhaust gas is raised to burn off PM deposited on a filter. Clogging of the filter can, therefore, be solved by forced regeneration.
- With the above-described conventional exhaust gas purification system, an appropriate value can be calculated as the above-mentioned determinative differential pressure ΔP insofar as it is applied to a vehicle, such as a truck, that does not undergo much abrupt variations in the injection quantity of fuel or abrupt variations in the volume of intake air, because the flow rate of exhaust gas remains stable during an operation. In a working machine, such as a hydraulic excavator, for which the present invention is useful, however, its body undergoes frequent abrupt variations such as variations in load and variations in swing torque so that the flow rates of exhaust gas as calculated at the time of the respective variations also vary significantly. As a consequence, no appropriate determinative differential pressure ΔP2 may be calculated in some instances. When the conventional technology is applied to a working machine and a determination is made at the regeneration determination unit of the controller by using such a determinative differential pressure ΔP2, a problem may hence arise that, even if PM has not deposited much on the filter actually, ΔP1>ΔP2 is determined and forced regeneration is performed although it is not needed. Such unnecessary forced regeneration results in a wasteful injection of fuel, and leads to a deterioration in fuel economy.
- With the foregoing circumstances of the above-described conventional technology in view, the present invention has as an object thereof the provision of an exhaust gas purification system for a working machine, which can realize forced regeneration without being affected by abrupt variations of a body.
- To achieve the above-described object, the present invention provides, in one aspect thereof, an exhaust gas purification system for a working machine provided with working equipment, a main body with the working equipment attached thereto, and an engine arranged on the main body to drive the working equipment, said exhaust gas purification system being provided with a filter for capturing particulate matter, which is contained in exhaust gas from the engine, on an exhaust downstream side, a differential pressure sensor for detecting a differential pressure between an exhaust upstream side and the exhaust downstream side of the filter, and a controller having a regeneration determination unit for determining, by a comparison between the differential pressure detected at the differential pressure sensor and a determinative differential pressure as a threshold level for determination, whether or not a time, at which forced regeneration is needed to burn the particulate matter captured on the filter, has been reached, wherein the controller comprises one that has a variation determination unit for determining whether or not a state quantity relevant to an operation of the engine has varied abruptly and that, when the state quantity is determined to have abruptly varied by the variation determination unit, performs processing to invalidate the determination by the regeneration determination unit during a predetermined time in which an effect of the state quantity is considered to diminish.
- The present invention has been made with an attention focused on the fact that upon occurrence of an abrupt variation on a body, a state quantity relevant to an operation of an engine, such as the engine speed or the injection quantity of fuel, varies abruptly. According to the present invention, when the state quantity relevant to the operation of the engine is determined by the variation determination unit of the controller to have abruptly varied in response to an abrupt variation of the body, processing is performed by the controller to invalidate the determination by the regeneration determination unit that determines whether or not forced regeneration is to be performed, in other words, to terminate a determination function of the regeneration determination unit during a predetermined time in which an effect of the abrupt variation in the state quantity is considered to diminish. The above-described predetermined time can be set experimentally or empirically in view of load variations which may occur on the associated working machine. As a consequence, the present invention can realize forced regeneration without being affected by abrupt variations of the body.
- The controller may preferably have a first computing unit for computing a flow rate of exhaust gas, and a second computing unit for computing the determinative differential pressure based on the flow rate of exhaust gas as computed at the first computing unit and a map preset in the controller and indicating correlations between flow rates of exhaust gas and determinative differential pressures.
- Preferably, the exhaust gas purification system may be further provided with a fuel control unit for controlling an injection quantity of fuel to be fed to the engine, an intake air volume sensor for detecting a volume of intake air to be fed to the engine and outputting a detection signal to the controller, an intake air temperature sensor for detecting a temperature of intake air and outputting a detection signal to the controller, and an exhaust gas temperature sensor for detecting a temperature of exhaust gas from the engine and outputting a detection signal to the controller; the controller may further comprise a fuel injection quantity instruction unit for outputting an instruction signal to instruct the injection quantity of fuel to the fuel control unit, and an intake air weight computing unit for computing a weight of intake air based on a density of intake air, which is determined according to the temperature of intake air as detected at the intake air temperature sensor and a map preset in the controller and indicating correlations between intake air temperatures and intake air densities, and the volume of intake air as detected at the intake air volume sensor;
an exhaust gas weight computing unit for computing a weight of exhaust gas based on the weight of intake air as computed at the intake air weight computing unit and the injection quantity of fuel as instructed by the fuel injection quantity instruction unit; and the first computing unit of the controller may perform processing to compute a flow rate of exhaust gas based on a density of exhaust gas, which is determined according to the temperature of exhaust gas as detected at the exhaust gas temperature sensor and a map preset in the controller and indicating correlations between exhaust gas temperatures and exhaust gas densities, and the weight of exhaust gas as computed at the exhaust gas weight computing unit. - The exhaust gas purification system may preferably be further provided with an engine speed sensor for detecting a revolution speed of the engine and outputting a detection signal to the controller; and the state quantity relevant to the operation of the engine may preferably be at least one of the revolution speed of the engine as detected at the engine speed sensor, the injection quantity of fuel as instructed by the fuel injection quantity instruction unit, the volume of intake air as detected at the intake air volume sensor, and the flow rate of exhaust gas as computed at the first computing unit of the controller.
- In the exhaust gas purification system of the present invention for the working machine equipped with the working equipment, the controller is constituted to comprise one that has the variation determination unit for determining whether or not the state quantity relevant to an operation of the engine has varied abruptly and that, when the state quantity is determined to have abruptly varied by the variation determination unit, performs processing to invalidate the determination by the regeneration determination unit during the predetermined time in which the effect of the state quantity is considered to diminish. Owing to this constitution, it is possible to realize forced regeneration without being affected by abrupt variations of the body. Described specifically, it is possible to minimize the performance of unnecessary forced regeneration that would otherwise tend to be performed in response to abrupt variations of the body, there by making it possible to prevent wasteful injections of fuel and hence to improve the fuel economy of the working machine equipped with the exhaust gas purification system.
-
FIG. 1 is a side view showing a hydraulic excavator described as an example of a working machine in which an exhaust gas purification system according to one embodiment of the present invention can be arranged. -
FIG. 2 is a diagram illustrating the constitution of the exhaust gas purification system according to the embodiment as arranged in the hydraulic excavator shown inFIG. 1 . -
FIG. 3 is a block diagram depicting an essential constitution of a controller included in the embodiment. -
FIG. 4 is a diagram illustrating characteristics available from the embodiment. - The exhaust gas purification system according to the one embodiment of the present invention for the working machine will hereinafter be described based on the drawings.
- As shown in
FIG. 1 , the hydraulic excavator which makes up the working machine is provided with atravel base 1 and anupperstructure 2 mounted on thetravel base 1. Thesetravel base 1 andupperstructure 2 make up a main body. This hydraulic excavator is also provided withworking equipment 3 attached tiltably in up-and-down directions to theupperstructure 2 and including a boom, an arm and so on, an operator'scab 4 arranged on theupperstructure 2, a counterweight 5 for assuring a weight balance, and anengine compartment 6 arranged between the operator'scab 4 and the counterweight 5. - This hydraulic excavator is also provided, as illustrated in
FIG. 2 , with anengine 10 accommodated in theengine compartment 6, anair cleaner 11 for removing dust from air to be inducted into theengine 10, that is, from intake air, anair compressor 12 of a turbocharger for compressing the intake air cleaned by theair cleaner 11 and guided through anintake air passage 30,intake air passages 31,32 for guiding into theengine 10 the intake air compressed by thecompressor 12, and anair cooler 13 arranged between theintake air passage 31 and the intake air passage 32 for cooling the intake air to be fed to theengine 10. The hydraulic excavator is further provided with aturbine 14 of the turbocharger and anexhaust gas passage 33, both of which guide exhaust gas from theengine 10,recirculation passages engine 10 and feeding it again into theengine 10, and an EGR (Exhaust Gas Recirculation)cooler 15 arranged between theserecirculation passages engine 10. - The exhaust gas purification systemof this embodiment for the hydraulic excavator of such a constitution as described above is provided, as also illustrated in
FIG. 2 , provided with afilter 20 for capturing PM, which is contained in the exhaust gas from theengine 10, at an exhaust downstream side and adifferential pressure sensor 21 for detecting a differential pressure between an exhaust upstream side and the exhaust downstream side of thefilter 20. This embodiment is also provided with acontroller 22 having aregeneration determination unit 22a depicted inFIG. 3 . By a comparison between the differential pressure detected at thedifferential pressure sensor 21, namely the detected differential pressure ΔP and a determinative differential pressure ΔPo as a threshold level for determination, theregeneration determination unit 22a determines whether or not a time, at which forced regeneration is needed to burn PM captured on thefilter 20, has been reached. When it is determined at theregeneration determination unit 22a that the time, at which forced regeneration is needed, has been reached, a control signal is outputted from thecontroller 22 to afuel injector 28, and by thisfuel injector 28, a predetermined quantity of fuel is injected to mix it into exhaust gas from theengine 10. - Referring back to
FIG. 2 , this embodiment is also provided with an intakeair volume sensor 23, an intakeair temperature sensor 24 and an exhaustgas temperature sensor 27. The intakeair volume sensor 23 detects a quantity of air guided into theintake air passage 30, that is, a quantity of intake air, and outputs a detection signal to thecontroller 22. The intakeair temperature sensor 24 detects a temperature of the intake air, and outputs a detection signal to thecontroller 22. The exhaustgas temperature sensor 27 detects a temperature of exhaust gas guided into theexhaust gas passage 33, and outputs a detection signal to thecontroller 22. - This embodiment is further provided, as depicted in
FIG. 3 , with afuel control unit 25 and anengine speed sensor 26. Thefuel control unit 25 controls a quantity of fuel, which is to be fed to theengine 10, response to a control signal outputted from a fuel injectionquantity instruction unit 22e included in thecontroller 22. Theengine speed sensor 26 detects a revolution speed of theengine 10, and outputs a detection signal to thecontroller 22. - In this embodiment, the
controller 22 includes, as depicted inFIG. 3 , one that has avariation determination unit 22b for determining whether or not a state quantity relevant to an operation of theengine 10, for example, an engine speed detected at theengine speed sensor 26 has varied abruptly, and that, when the engine speed is determined to have abruptly varied by thevariation determination unit 22b, performs processing to invalidate the above-mentioned determination by theregeneration determination unit 22a during a predetermined time in which an effect of the abrupt variation in engine speed is considered to diminish. - A determinative revolution speed variation ΔN1 as a threshold level for the determination of an abrupt variation in engine speed is stored in the
controller 22. Thevariation determination unit 22b compares the determinative revolution speed variation ΔN1 with an actual revolution speed variation ΔN computed based on the detection value by theengine speed sensor 26 and, when ΔN>ΔN1, determines that the engine speed has varied abruptly. - The above-mentioned predetermined time can be set experimentally or empirically in view of variations of the body, such as variations in load and variations in swing torque, which can occur on the hydraulic excavator shown in
FIG. 1 . - The controller is also provided, as depicted in
FIG. 3 , with afirst computing unit 22c and asecond computing unit 22d. Thefirst computing unit 22c computes an exhaust gas flow rate Vex . Thesecond computing unit 22d computes a determinative differential pressure ΔPo based on the exhaust gas flow rate Vex computed at thefirst computing unit 22c and a map preset in thecontroller 22 and indicating correlations between exhaust gas flow rates and determinative differential pressures. - The controller is further provided with an intake air
weight computing unit 22f, which computes an intake air weight Gin (= f2 x Vin) based on a intake air density f2, which is determined according to an intake air temperature Tin detected at the intakeair temperature sensor 24 and a map preset in thecontroller 22 and indicating correlations between intake air temperatures and intake air densities, and an intake air volume Vin detected at the intakeair volume sensor 23. - The
controller 22 is still further provided with an exhaust gasweight computing unit 22g for computing an exhaust gas weight Gex (= Gin + q) based on the intake air weight Gin computed at the intake airweight computing unit 22f and a fuel injection quantity q instructed by the fuel injectionquantity instruction unit 22e. - The above-mentioned
first computing unit 22c of thecontroller 22 performs processing to compute an exhaust gas flow rate Vex (= Gex/f3) based on an exhaust gas density f3 and the exhaust gas weight Gex computed at the exhaust gasweight computing unit 22g. The exhaust gas density f3 is determined according to an exhaust gas temperature Tex detected at the exhaustgas temperature sensor 27 and a map preset in thecontroller 22 and indicating correlations between exhaust gas temperatures and exhaust gas densities. Based on the determinative differential pressure ΔPo computed at thesecond computing unit 22d in accordance with the exhaust gas flow rate Vex computed at thefirst computing unit 22c and the detected differential pressure ΔP detected at thedifferential pressure sensor 21, the above-mentionedregeneration determination unit 22a determines, as mentioned above, whether or not the time, at which forced regeneration is needed, has been reached. - According to this embodiment constituted as described above, when as indicated by a sensing range S1 in
FIG. 4 , the load A is relatively stable and the engine speed N is maintained at a constant high revolution speed, the actual revolution speed variation ΔN calculated based on the detection value detected at theengine speed sensor 26 is not higher than the determinative revolution speed variation ΔN1, that is, ΔN<ΔN1, so that at thevariation determination unit 22b of thecontroller 22, the engine speed is determined to have undergone no abrupt variation. Therefore, theregeneration determination unit 22a functions normally, and performs a determination as to whether or not the time, at which forced regeneration is needed to burn PM captured on thefilter 20, has been reached, specifically a determination that compares the detected differential pressure ΔP and the determinative differential pressure ΔPo with each other. - When ΔP≤ΔPo is determined at the
regeneration determination unit 22a, it is determined that the time, at which forced regeneration is needed, has not been reached. As a consequence, no control signal is outputted to activate thefuel injector 28. When ΔP>ΔPo is determined at theregeneration determination unit 22a, on the other hand, it is determined that the time, at which forced regeneration is needed, has been reached, and thefuel injector 28 performs an injection to mix fuel in the exhaust gas from theengine 10 as mentioned above. As a result, the temperature of the exhaust gas rises under the action of the oxidation catalyst, the PM captured on thefilter 20 burns, and the clogging of thefilter 20 is solved. - When the load A has undergone an abrupt variation and the engine speed has undergone, for example, an abrupt drop, both at the
variation determination unit 22b of thecontroller 22, as indicated by a sensing range S2 inFIG. 4 , an actual revolution speed variation ΔN calculated based on a detection value of theengine speed sensor 26 becomes greater than the determinative revolution speed variation ΔN1, that is, ΔN>ΔN1 is obtained, processing is performed at thecontroller 22 to invalidate the determination processing by theregeneration determination unit 22a during a predetermined time T in which the effect of the rapid variation in engine speed is considered to diminish. - According to this embodiment constituted as described above, it is possible to perform forced regeneration without being affected by abrupt variations in the engine speed N, in other words, without being affected by abrupt variations of the
upperstructure 2 ortravel base 1. As a consequence, it is possible to minimize the practice of unnecessary forced regeneration, which would otherwise tend to be performed in response to abrupt variations of theupperstructure 2 ortravel base 1 and to prevent wasteful injections of fuel. Owing to this feature, it is possible to improve the fuel economy of a hydraulic excavator equipped with an exhaust gas purification system. - In the above-described embodiment, the engine speed N is described as the state quantity relevant to the operation of the
engine 10 to be determined at thevariation determination unit 22b of thecontroller 22. It is, however, to be noted that this state quantity can be the fuel injection quantity q instructed by the fuel injectionquantity instruction unit 22e of thecontroller 22, the intake air volume Vin detected at the intakeair volume sensor 23, the exhaust air flow rate Vex computed at thefirst computing unit 22c, or the like. It is also to be noted that the exhaust gas purification system may be designed to determine plural ones of these state quantities at thevariation determination unit 22b.
Claims (4)
- An exhaust gas purification system for a working machine provided with working equipment, a main body with the working equipment attached thereto, and an engine arranged on the main body to drive the working equipment, said exhaust gas purification system being provided with a filter for capturing particulate matter, which is contained in exhaust gas from the engine, on an exhaust downstream side, a differential pressure sensor for detecting a differential pressure between an exhaust upstream side and the exhaust downstream side of the filter, and a controller having a regeneration determination unit for determining, by a comparison between the differential pressure detected at the differential pressure sensor and a determinative differential pressure as a threshold level for determination, whether or not a time, at which forced regeneration is needed to burn the particulate matter captured on the filter, has been reached, wherein:the controller comprises one that has a variation determination unit for determining whether or not a state quantity relevant to an operation of the engine has varied abruptly and that, when the state quantity is determined to have abruptly varied by the variation determination unit, performs processing to invalidate the determination by the regeneration determination unit during a predetermined time in which an effect of the state quantity is considered to diminish to a negligible extent.
- The exhaust gas purification system according to claim 1, wherein:the controller has a first computing unit for computing a flow rate of exhaust gas, and a second computing unit for computing the determinative differential pressure based on the flow rate of exhaust gas as computed at the first computing unit and a map preset in the controller and indicating correlations between flow rates of exhaust gas and determinative differential pressures.
- The exhaust gas purification system according to claim 2, wherein:the exhaust gas purification system is further provided with:a fuel control unit for controlling an injection quantity of fuel to be fed to the engine,an intake air volume sensor for detecting a volume of intake air to be fed to the engine and outputting a detection signal to the controller,an intake air temperature sensor for detecting a temperature of intake air and outputting a detection signal to the controller, andan exhaust gas temperature sensor for detecting a temperature of exhaust gas from the engine and outputting a detection signal to the controller;the controller further comprises:a fuel injection quantity instruction unit for outputting an instruction signal to instruct the injection quantity of fuel to the fuel control unit, andan intake air weight computing unit for computing a weight of intake air based on a density of intake air, which is determined according to the temperature of intake air as detected at the intake air temperature sensor and a map preset in the controller and indicating correlations between intake air temperatures and intake air densities, and the volume of intake air as detected at the intake air volume sensor;an exhaust gas weight computing unit for computing a weight of exhaust gas based on the weight of intake air as computed at the intake air weight computing unit and the injection quantity of fuel as instructed by the fuel injection quantity instruction unit; andthe first computing unit of the controller performs processing to compute a flow rate of exhaust gas based on a density of exhaust gas, which is determined according to the temperature of exhaust gas as detected at the exhaust gas temperature sensor and a map preset in the controller and indicating correlations between exhaust gas temperatures and exhaust gas densities, and the weight of exhaust gas as computed at the exhaust gas weight computing unit.
- The exhaust gas purification system according to claim 3, wherein:the exhaust gas purification system is further provided with:an engine speed sensor for detecting a revolution speed of the engine and outputting a detection signal to the controller; andthe state quantity relevant to the operation of the engine is at least one of the revolution speed of the engine as detected at the engine speed sensor, the injection quantity of fuel as instructed by the fuel injection quantity instruction unit, the volume of intake air as detected at the intake air volume sensor, and the flow rate of exhaust gas as computed at the first computing unit of the controller.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011004960A JP2012145056A (en) | 2011-01-13 | 2011-01-13 | Exhaust gas purification system for working machine |
Publications (2)
Publication Number | Publication Date |
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EP2495420A2 true EP2495420A2 (en) | 2012-09-05 |
EP2495420A3 EP2495420A3 (en) | 2012-09-12 |
Family
ID=45440422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP12150080A Withdrawn EP2495420A3 (en) | 2011-01-13 | 2012-01-03 | Exhaust gas purification system for working machine |
Country Status (5)
Country | Link |
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US (1) | US20120180459A1 (en) |
EP (1) | EP2495420A3 (en) |
JP (1) | JP2012145056A (en) |
KR (1) | KR20120082340A (en) |
CN (1) | CN102588054A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6358909B2 (en) * | 2014-09-25 | 2018-07-18 | 株式会社クボタ | Work vehicle |
CN106323843B (en) * | 2016-11-17 | 2023-11-17 | 中国三冶集团有限公司 | Dust remover cloth bag fault detector and detection method thereof |
CN107013347A (en) * | 2017-06-07 | 2017-08-04 | 北京工业大学 | A kind of ONLINE RECOGNITION method of diesel exhaust gas flow |
CN107675739B (en) * | 2017-09-15 | 2020-07-17 | 安徽合矿环境科技股份有限公司 | Counter weight automatic movement excavator |
CN109631382A (en) * | 2018-11-20 | 2019-04-16 | 章礼道 | The AI air-conditioning system of highly sensitive temperature & relative humidity indicator real-time closed-loop control |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005307878A (en) | 2004-04-22 | 2005-11-04 | Nissan Diesel Motor Co Ltd | Exhaust emission control device |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS611816A (en) * | 1984-06-15 | 1986-01-07 | Toyota Motor Corp | Particulate purifying apparatus for diesel engine |
JPH08210121A (en) * | 1995-02-02 | 1996-08-20 | Toyota Motor Corp | Exhaust emission control device for diesel engine |
JP3186516B2 (en) * | 1995-06-27 | 2001-07-11 | 三菱自動車工業株式会社 | Particulate trap device |
JP3918649B2 (en) * | 2002-06-14 | 2007-05-23 | 株式会社デンソー | Exhaust gas purification device for internal combustion engine |
CN2769529Y (en) * | 2003-01-07 | 2006-04-05 | 中国环境科学研究院 | Diesel engine exhaust particulate filter electric heating regeneration automatic controlling system |
JP2004293339A (en) * | 2003-03-25 | 2004-10-21 | Mitsubishi Fuso Truck & Bus Corp | Exhaust emission control device |
CN100491704C (en) * | 2004-08-10 | 2009-05-27 | 日产自动车株式会社 | Estimation device and method of particulate matter deposit amount in diesel particulate filter |
JP4539500B2 (en) * | 2005-09-01 | 2010-09-08 | 株式会社デンソー | Exhaust gas purification device for internal combustion engine |
JP5122896B2 (en) * | 2007-09-25 | 2013-01-16 | 日立建機株式会社 | Exhaust gas purification system for construction machinery |
JP5053015B2 (en) * | 2007-09-25 | 2012-10-17 | 日立建機株式会社 | Exhaust gas purification system for construction machinery |
JP5123686B2 (en) * | 2008-02-08 | 2013-01-23 | 三菱重工業株式会社 | DPF accumulation amount estimation device |
-
2011
- 2011-01-13 JP JP2011004960A patent/JP2012145056A/en active Pending
- 2011-12-28 KR KR1020110144464A patent/KR20120082340A/en not_active Application Discontinuation
-
2012
- 2012-01-03 EP EP12150080A patent/EP2495420A3/en not_active Withdrawn
- 2012-01-04 US US13/343,219 patent/US20120180459A1/en not_active Abandoned
- 2012-01-11 CN CN2012100077324A patent/CN102588054A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005307878A (en) | 2004-04-22 | 2005-11-04 | Nissan Diesel Motor Co Ltd | Exhaust emission control device |
Also Published As
Publication number | Publication date |
---|---|
US20120180459A1 (en) | 2012-07-19 |
CN102588054A (en) | 2012-07-18 |
EP2495420A3 (en) | 2012-09-12 |
JP2012145056A (en) | 2012-08-02 |
KR20120082340A (en) | 2012-07-23 |
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