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    • 1. 发明授权
    • Exhaust gas purification method and exhaust gas purification system
    • 废气净化方法和废气净化系统
    • US07934372B2
    • 2011-05-03
    • US12086997
    • 2007-01-10
    • Takashi HaseyamaTakao OnoderaYoshinobu WatanabeTatsuo Mashiko
    • Takashi HaseyamaTakao OnoderaYoshinobu WatanabeTatsuo Mashiko
    • F01N3/025
    • B01D53/944B01D53/9495B01D2251/208B01D2258/012F01N3/023F01N3/035F01N2250/02F02D41/025F02D41/029F02D41/405F02D2200/0802F02D2200/703Y02T10/26Y02T10/44
    • In an exhaust gas purification system (1) for conducting control of raising temperature of a DPF (12b) by supplying an unburned fuel to an upstream side of an oxidation catalyst to oxidize it, a minimum value (Qumin) of a first upper limit value (Qu1) acquired by subtracting a fuel injection amount (Qe) for in-cylinder combustion from a first combustible fuel amount (Qa1) limited by an air/fuel ratio, a second upper limit value (Qu2) acquired by subtracting the fuel injection amount (Qe) for in-cylinder combustion from a second combustible fuel amount (Qa2) limited by an atmospheric pressure, and a third upper limit value (Qu3), which is a third combustible fuel amount (Qa3) which can be oxidized by the oxidation catalyst limited by a catalyst temperature index temperature (Tg1, Tg2) and an engine speed (Ne) is set as an upper limit value (Qu) for the unburned fuel supply amount (Qp). By this arrangement, at forced regeneration of the DPF (12b), the unburned fuel supplied into an exhaust gas is surely oxidized and generation of white smoke is prevented regardless of an operation state of an internal combustion engine (10).
    • 在排气净化系统(1)中,通过向氧化催化剂的上游侧供给未燃燃料进行氧化来进行DPF(12b)的升温控制,将第一上限值(Qumin)的最小值(Qumin) (Qu1)从通过空燃比限制的第一可燃燃料量(Qa1)减去用于缸内燃烧的燃料喷射量(Qe)而获得的第二上限值(Qu2),通过减去燃料喷射量 (Qa),第三可燃燃料量(Qa3)的第三上限值(Qu3),该第三可燃燃料量(Qa3)可以被氧化而被氧化 由催化剂温度指数温度(Tg1,Tg2)和发动机转速(Ne)限制的催化剂被设定为未燃燃料供给量(Qp)的上限值(Qu)。 通过这种布置,在DPF(12b)的强制再生时,不管内燃机(10)的运行状态如何,被供给到排气中的未燃燃料被确实地氧化,并且防止产生白烟。
    • 2. 发明申请
    • Exhaust Gas Purification Method and Exhaust Gas Purification System
    • 废气净化方法和废气净化系统
    • US20090165445A1
    • 2009-07-02
    • US12086997
    • 2007-01-10
    • Takashi HaseyamaTakao OnoderaYoshinobu WatanabeTatsuo Mashiko
    • Takashi HaseyamaTakao OnoderaYoshinobu WatanabeTatsuo Mashiko
    • F01N9/00F01N3/10
    • B01D53/944B01D53/9495B01D2251/208B01D2258/012F01N3/023F01N3/035F01N2250/02F02D41/025F02D41/029F02D41/405F02D2200/0802F02D2200/703Y02T10/26Y02T10/44
    • In an exhaust gas purification system (1) for conducting control of raising temperature of a DPF (12b) by supplying an unburned fuel to an upstream side of an oxidation catalyst to oxidize it, a minimum value (Qumin) of a first upper limit value (Qu1) acquired by subtracting a fuel injection amount (Qe) for in-cylinder combustion from a first combustible fuel amount (Qa1) limited by an air/fuel ratio, a second upper limit value (Qu2) acquired by subtracting the fuel injection amount (Qe) for in-cylinder combustion from a second combustible fuel amount (Qa2) limited by an atmospheric pressure, and a third upper limit value (Qu3), which is a third combustible fuel amount (Qa3) which can be oxidized by the oxidation catalyst limited by a catalyst temperature index temperature (Tg1, Tg2) and an engine speed (Ne) is set as an upper limit value (Qu) for the unburned fuel supply amount (Qp). By this arrangement, at forced regeneration of the DPF (12b), the unburned fuel supplied into an exhaust gas is surely oxidized and generation of white smoke is prevented regardless of an operation state of an internal combustion engine (10).
    • 在排气净化系统(1)中,通过向氧化催化剂的上游侧供给未燃燃料进行氧化来进行DPF(12b)的升温控制,将第一上限值(Qumin)的最小值(Qumin) (Qu1)从通过空燃比限制的第一可燃燃料量(Qa1)减去用于缸内燃烧的燃料喷射量(Qe)而获得的第二上限值(Qu2),通过减去燃料喷射量 (Qa),第三可燃燃料量(Qa3)的第三上限值(Qu3),该第三可燃燃料量(Qa3)可以被氧化而被氧化 由催化剂温度指数温度(Tg1,Tg2)和发动机转速(Ne)限制的催化剂被设定为未燃燃料供给量(Qp)的上限值(Qu)。 通过这种布置,在DPF(12b)的强制再生时,不管内燃机(10)的运行状态如何,被供给到排气中的未燃燃料被确实地氧化,并且防止产生白烟。
    • 4. 发明申请
    • Exhaust Gas Purification Method and Exhaust Gas Purification System
    • 废气净化方法和废气净化系统
    • US20090056316A1
    • 2009-03-05
    • US12087467
    • 2007-01-10
    • Takashi HaseyamaTakao OnoderaYoshinobu WatanabeTatsuo Mashiko
    • Takashi HaseyamaTakao OnoderaYoshinobu WatanabeTatsuo Mashiko
    • F01N9/00
    • B01D53/944B01D53/9495B01D2251/208B01D2258/012F01N3/021F01N3/035F01N9/002F01N11/002F01N13/009F01N13/0097F01N2250/02F01N2610/03F02D41/025F02D41/029F02D41/1446F02D2200/0804Y02T10/26Y02T10/47
    • In an exhaust gas purification system (1) comprising an exhaust gas purification device (12) having an oxidation catalyst device (12a) carrying an oxidation catalyst and a DPF (12b) arranged in order from an upstream side or a DPF carrying an oxidation catalyst in an exhaust passage (11) of an internal combustion engine (10), in which at regeneration of the DPF (12b), when a catalyst temperature index temperature (Tg2) indicating a temperature of the oxidation catalyst becomes equal to a predetermined determining temperature (Tc1) or above, control of raising a temperature of the DPF (12b) is conducted by supplying an unburned fuel to the upstream side of the oxidation catalyst to thereby oxidize the unburned fuel by the oxidation catalyst, wherein the predetermined determining temperature (Tc1) is changed according to an engine speed Ne of the internal combustion engine (10). By this arrangement, at the regeneration of the DPF (12b), in the regeneration control of raising the temperature of the DPF (12b) by oxidizing the unburned fuel supplied into an exhaust gas by the oxidation catalyst (12a), the unburned fuel supplied into the exhaust gas is surely oxidized and outflow of white smoke is prevented regardless of an operation state of the internal combustion engine (10).
    • 在具有排气净化装置(12)的废气净化系统(1)中,所述废气净化装置(12)具有载持氧化催化剂的氧化催化剂装置(12a)和从上游侧依次排列的DPF(12b)或携带氧化催化剂的DPF 在DPF(12b)的再生的内燃机(10)的排气通路(11)中,当表示氧化催化剂的温度的催化剂温度指数温度(Tg2)变为等于预定的确定温度 (Tc1)以上时,通过向氧化催化剂的上游侧供给未燃烧燃料,通过氧化催化剂氧化未燃烧燃料,进行DPF(12b)的升温控制,其中,规定的测定温度(Tc1 )根据内燃机(10)的发动机转速Ne而变化。 通过这种布置,在DPF(12b)的再生时,在通过氧化由氧化催化剂(12a)供给到废气中的未燃烧燃料来提高DPF(12b)的温度的再生控制中,供给未燃燃料 无论内燃机(10)的运转状态如何,都能够防止排气被氧化并防止白烟流出。
    • 5. 发明申请
    • Method for Controlling Exhaust Gas Purification System and Exhaust Gas Purification System
    • 控制废气净化系统和废气净化系统的方法
    • US20090025372A1
    • 2009-01-29
    • US12223443
    • 2007-01-10
    • Takao OnoderaTakashi HaseyamaYoshinobu WatanabeTakuro IwashitaKenji HagioTatsuo Mashiko
    • Takao OnoderaTakashi HaseyamaYoshinobu WatanabeTakuro IwashitaKenji HagioTatsuo Mashiko
    • F01N9/00
    • F02D41/029F01N3/0235F01N3/035F01N3/106F01N9/002F01N13/0097F01N2430/085F01N2560/06F02D9/04F02D9/06F02D41/086F02D2200/0802F02D2200/0804F02M26/23Y02T10/47
    • In regeneration control, when the catalyst temperature index temperature (Tg2) using the temperature of the oxidation catalyst (12a) as an index is below a predetermined first determination temperature (Tc1), the engine speed of idling is brought to a predetermined first target engine speed (Nei1) which is higher than the engine speed of idling (Nei0) in the ordinary operation, and, further, multi-injection is carried out. On the other hand, when the catalyst temperature index temperature (Tg2) is the predetermined first determination temperature (Tc1) or above, the engine speed of idling is brought to a predetermined second target engine speed (Nei2), which is lower than the predetermined first target engine speed (Nei1) and is higher than the engine speed of idling (Nei0) in ordinary operation, and, further, post injection is carried out, followed by raising of the temperature of an exhaust gas flown into a DPF apparatus (12b) to a predetermined second determination temperature (Tc2). According to the above constitution, in the regeneration control of the DPF apparatus (12b) in an internal combustion engine (10), the regeneration can be forcibly carried out with high efficiency while enhancing the temperature rise efficiency of the exhaust gas, and, at the same time, excessive rise in the exhaust temperature, a deterioration in fuel consumption, and the occurrence of noise are suppressed.
    • 在再生控制中,当使用氧化催化剂(12a)的温度作为指标的催化剂温度指数温度(Tg2)低于预定的第一确定温度(Tc1)时,将空转的发动机转速提供给预定的第一目标发动机 在通常的运转中高于发动机转速(Nei0)的速度(Nei1),进一步进行多次喷射。 另一方面,当催化剂温度指数温度(Tg2)为规定的第一判定温度(Tc1)以上时,使空转的发动机转速达到规定的第二目标发动机转速(Nei2),该第二目标发动机转速低于规定值 第一目标发动机转速(Nei1)并且在正常操作中高于怠速发动机转速(Nei0),此外,进行后喷射,随后升高流入DPF装置的排气温度(12b )到预定的第二确定温度(Tc2)。 根据上述结构,在内燃机(10)中的DPF装置(12b)的再生控制中,能够在提高排气的升温效率的同时高效率地强制地进行再生,并且在 同时,排气温度的过度上升,燃料消耗的恶化和噪音的发生被抑制。
    • 7. 发明授权
    • Method for controlling exhaust gas purification system and exhaust gas purification system
    • 排气净化系统和废气净化系统的控制方法
    • US07992383B2
    • 2011-08-09
    • US12223443
    • 2007-01-10
    • Takao OnoderaTakashi HaseyamaYoshinobu WatanabeTakuro IwashitaKenji HagioTatsuo Mashiko
    • Takao OnoderaTakashi HaseyamaYoshinobu WatanabeTakuro IwashitaKenji HagioTatsuo Mashiko
    • F01N3/00F01N3/02
    • F02D41/029F01N3/0235F01N3/035F01N3/106F01N9/002F01N13/0097F01N2430/085F01N2560/06F02D9/04F02D9/06F02D41/086F02D2200/0802F02D2200/0804F02M26/23Y02T10/47
    • In regeneration control, when the catalyst temperature index temperature (Tg2) using the temperature of the oxidation catalyst (12a) as an index is below a predetermined first determination temperature (Tc1), the engine speed of idling is brought to a predetermined first target engine speed (Nei1) which is higher than the engine speed of idling (Nei0) in the ordinary operation, and, further, multi-injection is carried out. On the other hand, when the catalyst temperature index temperature (Tg2) is the predetermined first determination temperature (Tc1) or above, the engine speed of idling is brought to a predetermined second target engine speed (Nei2), which is lower than the predetermined first target engine speed (Nei1) and is higher than the engine speed of idling (Nei0) in ordinary operation, and, further, post injection is carried out, followed by raising of the temperature of an exhaust gas flown into a DPF apparatus (12b) to a predetermined second determination temperature (Tc2). According to the above constitution, in the regeneration control of the DPF apparatus (12b) in an internal combustion engine (10), the regeneration can be forcibly carried out with high efficiency while enhancing the temperature rise efficiency of the exhaust gas, and, at the same time, excessive rise in the exhaust temperature, a deterioration in fuel consumption, and the occurrence of noise are suppressed.
    • 在再生控制中,当使用氧化催化剂(12a)的温度作为指标的催化剂温度指数温度(Tg2)低于预定的第一确定温度(Tc1)时,将空转的发动机转速提供给预定的第一目标发动机 在通常的运转中高于发动机转速(Nei0)的速度(Nei1),进一步进行多次喷射。 另一方面,当催化剂温度指数温度(Tg2)为规定的第一判定温度(Tc1)以上时,使空转的发动机转速达到规定的第二目标发动机转速(Nei2),该第二目标发动机转速低于规定值 第一目标发动机转速(Nei1)并且在正常操作中高于怠速发动机转速(Nei0),此外,进行后喷射,随后升高流入DPF装置的排气温度(12b )到预定的第二确定温度(Tc2)。 根据上述结构,在内燃机(10)中的DPF装置(12b)的再生控制中,能够在提高排气的升温效率的同时高效率地强制地进行再生,并且在 同时,排气温度的过度上升,燃料消耗的恶化和噪音的发生被抑制。