Exhaust gas purifying apparatus and exhaust gas purifying...

Details Exhaust gas purifying apparatus and exhaust gas purifying... Exhaust gas purifying apparatus and exhaust gas purifying...

2004-09-17

2008-12-23

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S297000, C060S301000, C060S303000

Reexamination Certificate

active

07467512

ABSTRACT:
In an SCR apparatus mounted on a vehicle, the concentration of a reducing agent or a precursor thereof contained in an aqueous solution of the reducing agent or the precursor is accurately detected. In sensing the concentration, whether or not the urea water stored in a storage tank is in a stationary state is determined. Only it is in a stationary state, the concentration is detected. The determination of whether or not it is in a stationary state or not is preferably determined by determining whether the vehicle is stopped (S207) and that the period of time TIM that has elapsed after the stoppage has reached a predetermined stationary time TIM1(S211). The deceleration DCL of the vehicle before stoppage thereof is detected, and the stationary time TIM1is altered in accordance with the deceleration DCL (S206).

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International Preliminary Report and Written Opinion, dated Jun. 20, 2006; and an English-language Translation of the International Preliminary Report and Written Opinion.

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