| 摘要 |
<P>PROBLEM TO BE SOLVED: To extremely simply and precisely estimate the temperature of a glow plug tip. <P>SOLUTION: An arithmetic and control part 23 is configured to arithmetically calculate a resistance value of a glow plug 1 on the basis of an energization current of the glow plug 1 and a voltage applied to the glow plug 1 (S104), to perform a multiplication of the resistance value and a predetermined constant on the basis of an electrical characteristic of the glow plug 1, and input a predetermined heater reference point temperature (S106), to calculate an offset with a predetermined offset arithmetic expression from the heater reference point temperature (S108), and to correct the multiplication result with the offset, and take the correction result as an estimated temperature of a tip of the glow plug 1. <P>COPYRIGHT: (C)2012,JPO&INPIT |
