Diesel particulate filter and exhaust emission control system
AssigneesMitsubishi Jidosha Kogyo Kabushiki Kaisha, Dowa Electronics Materials Co., Ltd.
InventorsMasashi Takahashi, Hiroshi Tanada, Takuya Yano
Life of this patent
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Abstract
Diesel particulate filter that can lower the particulate matter (PM) combustion start temperature and use material containing silicon (Si) for a carrier. The carrier, which has a filter function, is allowed to support a perovskite-type complex oxide expressed by formula (1) as follows, wherein 0<x<0.7 and 0≦y≦1: formula (1)=La1-xBaxMnyFe1-yO3.
Claims11
A diesel particulate filter, comprising:
- a carrier which has filter functions, wherein fine pores are formed in said carrier;
- and
- a perovskite type complex oxide in particulate form supported by said carrier and expressed by the following formula (1):
- La1-xBaxMnyFe1-yO3 (1)
- in which 0<x<0.7 and 0≦y≦1,
- wherein the particle diameter of the perovskite type complex oxide is smaller than the fine pore diameter of said carrier.
An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
- a diesel particulate filter that comprises a carrier which has filter functions and a perovskite type complex oxide supported by said carrier and expressed by the following formula (1);
- and
- a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter:
- La1-xBaxMnyFe1-yO3 (1)
- (where 0<x<0.7 and 0≦y≦1 in formula (1) above).
An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
- a diesel particulate filter that comprises a carrier which has filter functions and a perovskite type complex oxide supported by said carrier and expressed by the following formula (1);
- and
- a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter:
- La1-xBaxMnyFe1-yO3 (1)
- (where 0.1≦x≦0.6 and 0≦y≦1 in formula (1) above).
An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
- a diesel particulate filter that comprises a carrier which has filter functions and a perovskite type complex oxide supported by said carrier and expressed by the following formula (1);
- and
- a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter:
- Lal-xBaxMnyFe1-yO3 (1)
- (where 0<x<0.7 and y=0 in formula (1) above).
An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
- a diesel particulate filter that comprises a carrier which has filter functions and a perovskite type complex oxide supported by said carrier and expressed by the following formula (1);
- and
- a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter:
- La1-xBaxMnyFe1-yO3 (1)
- (where 0<x<0.7 and y=1 in formula (1) above).
An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
- a diesel particulate filter that comprises a carrier which has filter functions and a perovskite type complex oxide supported by said carrier and expressed by the following formula (1), wherein the perovskite type complex oxide exists in a particulate form, fine pores are formed in the carrier, and the particle diameter of the perovskite type complex oxide is smaller than the fine pore diameter of the carrier;
- and
- a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter:
- La1-xBaxMnyFe1-yO3 (1)
- (where 0<x<0.7 0≦y≦1 and in formula (1) above).
An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
- a diesel particulate filter that comprises
- a carrier which has filter functions,
- a perovskite type complex oxide supported by said carrier and expressed by the following formula (1)
- La1-xBaxMnyFe1-yO3 (1)
- in which 0<x<0.7 0≦y≦1, and
- an oxidation catalyst containing at least one element selected from the group consisting of Pt, Rh, and Pd, which is supported by said carrier;
- and
- a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter.
Dependencies are inferred from the claim text.