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公开(公告)号:US08161737B2
公开(公告)日:2012-04-24
申请号:US12770029
申请日:2010-04-29
申请人: Isamu Kanaya , Takayuki Adachi , Nobuhiko Masaki , Kiminobu Hirata , Jin Kusaka , Keishi Takada , Takeshi Mende , Fumiyuki Tsurumi
发明人: Isamu Kanaya , Takayuki Adachi , Nobuhiko Masaki , Kiminobu Hirata , Jin Kusaka , Keishi Takada , Takeshi Mende , Fumiyuki Tsurumi
IPC分类号: F01N3/00
CPC分类号: F01N3/0231 , B01D46/0061 , B01D46/448 , B01D46/46 , B01D2279/30 , F01N9/002 , F01N2560/06 , F01N2560/08 , F01N2560/14 , F01N2900/1606 , F02D41/1467 , F02D2200/0812 , Y02T10/47
摘要: An exhaust gas pressure P, exhaust gas temperatures TU and TD on upstream and downstream of a DPF, a rotation speed Ne, a load Q, and an intake flow rate F as various operating conditions are read, and an amount of PM generated for short time Δt is obtained to be added to a PM deposited amount m, and thus, to obtain an initial deposited amount. Exhaust gas properties and a space velocity SV are obtained based on various operating conditions, and the PM deposited amount m after a lapse of the short time Δt is estimated from a PM deposited amount estimation equation “m=m·exp(−B·Δt)” having been derived considering the exhaust gas properties and the space velocity SV. When the PM deposited amount m is equal to or more than a predetermined value, a forced regeneration processing in the DPF is executed, and thereafter, the PM deposited amount m is reset to 0.
摘要翻译: 读取DPF的上游和下游的排气压力P,排气温度TU和TD,作为各种操作条件的转速Ne,负载Q和进气流量F,并且生成短的PM量 时间&Dgr; t被添加到PM沉积量m,从而获得初始沉积量。 根据各种运行条件获得废气特性和空速SV,通过PM沉积量估计方程“m = m·exp(-B)”估算经过短时间Dgr之后的PM沉积量m ·&Dgr; t)“,考虑到废气特性和空间速度SV。 当PM沉积量m等于或大于预定值时,执行DPF中的强制再生处理,此后将PM沉积量m重置为0。
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公开(公告)号:US20100269490A1
公开(公告)日:2010-10-28
申请号:US12770029
申请日:2010-04-29
申请人: Isamu KANAYA , Takayuki Adachi , Nobuhiko Masaki , Kiminobu Hirata , Jin Kusaka , Keishi Takada , Takeshi Mende , Fumiyuki Tsurumi
发明人: Isamu KANAYA , Takayuki Adachi , Nobuhiko Masaki , Kiminobu Hirata , Jin Kusaka , Keishi Takada , Takeshi Mende , Fumiyuki Tsurumi
CPC分类号: F01N3/0231 , B01D46/0061 , B01D46/448 , B01D46/46 , B01D2279/30 , F01N9/002 , F01N2560/06 , F01N2560/08 , F01N2560/14 , F01N2900/1606 , F02D41/1467 , F02D2200/0812 , Y02T10/47
摘要: An exhaust gas pressure P, exhaust gas temperatures TU and TD on upstream and downstream of a DPF, a rotation speed Ne, a load Q, and an intake flow rate F as various operating conditions are read, and an amount of PM generated for short time Δt is obtained to be added to a PM deposited amount m, and thus, to obtain an initial deposited amount. Exhaust gas properties and a space velocity SV are obtained based on various operating conditions, and the PM deposited amount m after a lapse of the short time Δt is estimated from a PM deposited amount estimation equation “m=m·exp(−B·Δt)” having been derived considering the exhaust gas properties and the space velocity SV. When the PM deposited amount m is equal to or more than a predetermined value, a forced regeneration processing in the DPF is executed, and thereafter, the PM deposited amount m is reset to 0.
摘要翻译: 读取DPF的上游和下游的排气压力P,排气温度TU和TD,作为各种操作条件的转速Ne,负载Q和进气流量F,并且生成短的PM量 时间&Dgr; t被添加到PM沉积量m,从而获得初始沉积量。 根据各种运行条件获得废气特性和空速SV,通过PM沉积量估计方程“m = m·exp(-B)”估算经过短时间Dgr t之后的PM沉积量m ·&Dgr; t)“,考虑到废气特性和空间速度SV。 当PM沉积量m等于或大于预定值时,执行DPF中的强制再生处理,此后将PM沉积量m重置为0。
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公开(公告)号:US09523302B2
公开(公告)日:2016-12-20
申请号:US14114108
申请日:2012-01-11
IPC分类号: F01N3/20 , B01D53/94 , F01N3/10 , F01N3/035 , B01J37/02 , B01J23/44 , B01J29/72 , B01J35/00 , B01J35/02 , B01J35/04 , F01N13/00
CPC分类号: F01N3/208 , B01D53/9418 , B01D53/944 , B01D53/9477 , B01D2255/1021 , B01D2255/1023 , B01D2255/50 , B01D2255/9155 , B01D2255/9202 , B01D2258/012 , B01J23/44 , B01J29/7215 , B01J35/006 , B01J35/023 , B01J35/04 , B01J37/0201 , B01J37/0242 , F01N3/035 , F01N3/103 , F01N3/2066 , F01N13/009 , F01N13/0097 , F01N2510/06 , F01N2510/068 , F01N2610/02 , Y02A50/2341 , Y02T10/24
摘要: An exhaust gas purification catalyst apparatus. The apparatus has a noble metal component for oxidizing NOx in an exhaust gas discharged from a diesel engine, a reducing agent spraying means for supplying the reducing agent selected from a urea component or an ammonia component, and a selective reduction catalyst (SCR) not comprising a noble metal for removing by reduction NOx by contacting with the reducing agent, in this order from the upstream side of an exhaust gas passage. Activity of the selective reduction catalyst (SCR) is maintained by setting that the noble metal component of the oxidation catalyst (DOC) comprises platinum and palladium, and ratio of platinum particles existing alone is 20% or less, or average particle diameter of the noble metal is 4 nm or larger, and by suppressing volatilization of platinum from the oxidation catalyst (DOC), even when catalyst bed temperature increases up to 900° C.
摘要翻译: 废气净化催化剂装置。 该装置具有用于氧化从柴油发动机排出的废气中的NOx的贵金属成分,用于供给选自尿素成分或氨成分的还原剂的还原剂喷射装置和不包含 从废气通道的上游侧起依次通过与还原剂接触还原NOx除去的贵金属。 通过设定氧化催化剂(DOC)的贵金属成分含有铂和钯,单独存在的铂粒子的比例为20%以下,或贵金属的平均粒径,可以维持选择还原催化剂(SCR)的活性 金属为4nm以上,并且通过抑制铂从氧化催化剂(DOC)的挥发,即使催化剂床温度升高至900℃。
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公开(公告)号:US20140050627A1
公开(公告)日:2014-02-20
申请号:US14114108
申请日:2012-01-11
IPC分类号: F01N3/20
CPC分类号: F01N3/208 , B01D53/9418 , B01D53/944 , B01D53/9477 , B01D2255/1021 , B01D2255/1023 , B01D2255/50 , B01D2255/9155 , B01D2255/9202 , B01D2258/012 , B01J23/44 , B01J29/7215 , B01J35/006 , B01J35/023 , B01J35/04 , B01J37/0201 , B01J37/0242 , F01N3/035 , F01N3/103 , F01N3/2066 , F01N13/009 , F01N13/0097 , F01N2510/06 , F01N2510/068 , F01N2610/02 , Y02A50/2341 , Y02T10/24
摘要: An exhaust gas purification catalyst apparatus. The apparatus has a noble metal component for oxidizing NOx in an exhaust gas discharged from a diesel engine, a reducing agent spraying means for supplying the reducing agent selected from a urea component or an ammonia component, and a selective reduction catalyst (SCR) not comprising a noble metal for removing by reduction NOx by contacting with the reducing agent, in this order from the upstream side of an exhaust gas passage. Activity of the selective reduction catalyst (SCR) is maintained by setting that the noble metal component of the oxidation catalyst (DOC) comprises platinum and palladium, and ratio of platinum particles existing alone is 20% or less, or average particle diameter of the noble metal is 4 nm or larger, and by suppressing volatilization of platinum from the oxidation catalyst (DOC), even when catalyst bed temperature increases up to 900° C.
摘要翻译: 废气净化催化剂装置。 该装置具有用于氧化从柴油发动机排出的废气中的NOx的贵金属成分,用于供给选自尿素成分或氨成分的还原剂的还原剂喷射装置和不包含 从废气通道的上游侧起依次通过与还原剂接触还原NOx除去的贵金属。 通过设定氧化催化剂(DOC)的贵金属成分含有铂和钯,单独存在的铂粒子的比例为20%以下,或贵金属的平均粒径,可以维持选择还原催化剂(SCR)的活性 金属为4nm以上,并且通过抑制铂从氧化催化剂(DOC)的挥发,即使催化剂床温度升高至900℃。
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