Urea concentration identifying system, method for...

Details Urea concentration identifying system, method for... Urea concentration identifying system, method for...

2011-07-05

2011-07-05

Nguyen, Tu M (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

C060S299000, C204S403100, C204S408000, C324S439000, C324S446000

Reexamination Certificate

active

07971425

ABSTRACT:
The concentration of the urea of a urea solution is identified accurately and immediately. A pulse voltage is applied for a predetermined time to a urea concentration identifying sensor heater including a heater and an identifying liquid temperature sensor provided in the vicinity of the heater, a urea solution to be identified is heated by the heater, and the concentration of the urea is identified with a voltage output difference V0corresponding to a temperature difference between an initial temperature and a peak temperature in the identifying liquid temperature sensor.

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