Patent · US Active

System for exhaust gas treatment for internal combustion engines

US9399941B2 · kind B2 · utility

2Cited by

7References

10Claims

0Family size

Assignee

HYDAC Electronic GmbH · DE

Inventors

Christian Groh · Gersheim, DE
Frank Kattler · Ettlingen, DE

Key dates

Filing date	Apr 5, 2013
Grant date	Jul 26, 2016
Priority date	—
Expiry date	Apr 5, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A system for exhaust gas treatment for internal combustion engines has a pump (1) for metered supply of a freezable substance, particularly a urea solution, to a supply device (23) introducing the substance into the exhaust gas flow. A compensation device (25) is provided as protection against damage to the system due to volume expansion when the substance freezes. The compensation device compensates for the volume expansion accompanying an increase of the fluid pressure when the substance freezes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.