| 摘要 |
A System for exhaust gas treatment for internal combustion engines, having a pump (1) for metered supply of a freezable substance, particularly a urea solution, to a supply device (23) introducing said substance into the exhaust gas flow, is characterised in that a compensation device (25) is provided as protection against damage to the System due to volume expansion when the substance freezes, said compensation device compensating for the volume expansion accompanying an increase of the fluid pressure when the substance freezes. |
