Heating device for metering system of e.g. aqueous urea solution, has heating elements that provide predetermined heating power over predetermined voltage range of supply voltage to maintain specific temperature range of urea solution

摘要

The heating device has heating elements (210,220) that are arranged in parallel and switched to provide a predetermined heating power over a predetermined voltage range of supply voltage to maintain a specific temperature range of aqueous urea solution. The heating element is formed meander-like or in grid shape. The temperature range of the aqueous urea solution is -40-+20[deg] C. The heating elements provide a maximum temperature of 120[deg] C.