Method for removal of wedging of metering valve in metering system used for metering urea-water solution into engine, involves energizing magnet coil of valve for releasing wedging of valve under specific cooling water temperature

摘要

The method involves inputting heat into metering valve (14) by energizing a magnetic coil (30) of metering valve. Cooling water (20) having specific coolant temperature is passed via metering valve for optional cooling of internal combustion engine (10). A measure of cooling water temperature (temp w) is provided such that cooling water temperature threshold (temp w lim) is specified. The magnet coil of metering valve is energized for releasing wedging of metering valve when cooling water temperature exceeds cooling water temperature threshold. Independent claims are included for the following: (1) a device for removal of wedging of metering valve; (2) a control device program for removal of wedging of metering valve; and (3) a control device program product for removal of wedging of metering valve.