Device for exhaust gas after treatment of motor vehicles, in particular, diesel engine vehicles

A device for exhaust gas after treatment of motor vehicles, the device comprising:

• at least one pump device for supplying a solution to an exhaust gas manifold of a motor vehicle;
• wherein the pump device is a metering pump having at least one connecting part;
• wherein the at least one connecting part opens into the exhaust gas manifold;
• wherein the at least one pump device comprises at least one piston;
• wherein the at least one pump device comprises a piezo element configured to actuate the at least one piston;
• wherein the at least one pump device has a transmission element connected to the piston and the piezo element;
• and
• wherein the transmission element is a pivot lever.

A device for exhaust gas after treatment of motor vehicles, the device comprising:

• at least one pump device for supplying a solution to an exhaust gas manifold of a motor vehicle;
• wherein the pump device is a metering pump having at least one connecting part;
• wherein the at least one connecting part opens into the exhaust gas manifold;
• wherein the at least one pump device comprising at least one piston;
• wherein the at least one pump device comprises a piezo element configured to actuate the at least one piston;
• wherein the at least one pump device has a transmission element connected to the piston and the piezo element;
• and
• wherein the piezo element and the piston extend parallel to one another.