| 摘要 |
PCT No. PCT/DE89/00632 Sec. 371 Date Mar. 20, 1991 Sec. 102(e) Date Mar. 20, 1991 PCT Filed Oct. 5, 1989 PCT Pub. No. WO90/04091 PCT Pub. Date Apr. 19, 1990.A device for controlling the temperature of a resistor used for measuring purposes is adversely affected in its measuring accuracy as the result of deposits on the resistor (8). To establish the degree of contamination and to initiate a free-burning operating, in the case of a device associated with an internal-combustion engine, the air volume (m), respectively the fuel quantity (k), is determined and compared to a specific limiting value (mMax or kMax). When the limiting value is exceeded, a trigger signal is emitted to initiate the free-burning operation in order to burn free the resistor (8).
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