| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately and rapidly identify the urea concentration of a urea solution, in gasoline with various compositions having different distillation performance states. <P>SOLUTION: A urea concentration identifying sensor/heater is provided with a heater and a liquid temperature for identifying sensor disposed in the vicinity of the heater, and applied with a pulse voltage for a predetermined time interval. By having the heater heat the urea solution to be identified, urea concentration is identified by a voltage output difference V0, corresponding to the temperature difference between the initial temperature and the peak temperature of the liquid temperature identifying sensor. <P>COPYRIGHT: (C)2008,JPO&INPIT |
