Pump unit for reducing agents in an exhaust gas purification system
View Patent ↗A pump for reducing agents of an exhaust gas purification system for an internal combustion engine of a motor vehicle includes: a diaphragm carrier; a diaphragm arranged on the diaphragm carrier, the diaphragm having a radially outer collar; and a pump housing configured to secure the radially outer collar of the diaphragm. The radially outer collar of the diaphragm has a reinforcing ring.
1. A pump for reducing agents of an exhaust gas purification system for an internal combustion engine of a motor vehicle, the pump comprising:
a diaphragm carrier;
a diaphragm arranged on the diaphragm carrier, the diaphragm having a radially outer collar; and
a pump housing configured to secure the radially outer collar of the diaphragm,
wherein the radially outer collar of the diaphragm has a reinforcing ring entirely arranged on a radially outermost portion of the radially outer collar.
2. The pump as claimed in claim 1 , further comprising a holding groove defined by housing parts of the pump housing, wherein the radially outer collar of the diaphragm completely fills the holding groove.
3. The pump as claimed in claim 1 , wherein the reinforcing ring is clamped between two housing parts of the pump housing.
4. A pump for reducing agents of an exhaust gas purification system for an internal combustion engine of a motor vehicle, the pump comprising:
a diaphragm carrier;
a diaphragm arranged on the diaphragm carrier, the diaphragm having a radially outer collar; and
a pump housing configured to secure the radially outer collar of the diaphragm,
wherein the radially outer collar of the diaphragm has a reinforcing ring, and
wherein the reinforcing ring comprises metal.
5. The pump as claimed in claim 1 , wherein the reinforcing ring is connected in an integrally joined manner to elastomeric material of the diaphragm.
6. The pump as claimed in claim 1 , wherein the reinforcing ring is pressed on the pump housing.