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US 2010/0132333 A1Published application
Exhaust emission control device
AssigneeHino Motors, Ltd.
InventorsHiroshi Endo, Noriyuki Takahashi
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AssigneeHino Motors, Ltd.
InventorsHiroshi Endo, Noriyuki Takahashi
Estimating the term…
The invention has its object to realize compact arrangement of particulate filter 5 and selective reduction catalyst 6 for improved mountability on a vehicle while a sufficient reaction time is ensured for generation of ammonia from urea water. In an exhaust emission control device with the filter 5 and the catalyst 6 capable of selectively reacting NOx with ammonia even in the presence of oxygen being incorporated in an exhaust pipe 4, urea water as reducing agent being addible therebetween, the filter 5 is arranged in a fore-and-aft direction of a vehicle and along a frame 10 of the vehicle. The catalyst 6 is arranged in a vicinity of an inlet end of the filter 5 and directed laterally outward of the vehicle. A communication passage 9 is arranged to guide the exhaust gas 3 discharged from an outlet end of the filter 5 to an inlet end of the catalyst 6 in a forwardly fold-back manner. A urea water adding injector 11 (urea water adding means) for addition of urea water is arranged midway of the passage 9.
An exhaust emission control device having a particulate filter incorporated in an exhaust pipe for capturing particulates in exhaust gas and a selective reduction catalyst downstream of said particulate filter and capable of selectively reacting NOx with ammonia even in the presence of oxygen, urea water as reducing agent being addable between said selective reduction catalyst and said particulate filter, comprising the particulate filter arranged along a frame of a vehicle and in a fore-and-aft direction of the vehicle, the selective reduction catalyst arranged in a vicinity of an inlet end of said particulate filter and directed laterally outward of the vehicle, a communication passage arranged for guidance of the exhaust gas from an outlet end of the particulate filter to an inlet end of the selective reduction catalyst in a forward fold-back manner and urea water adding means provided midway of the communication passage for addition of urea water.
Dependencies are inferred from the claim text.