Exhaust gas recirculation device

An exhaust gas recirculation device for recirculating exhaust gas into a gas feed to an engine, said device having an exhaust gas feed, a fresh gas feed and an outlet duct opening into the gas feed, at least the exhaust gas feed and the fresh gas feed being interconnected via a control means for metering exhaust gas, a pressure plate disposed on a side of the control means facing the fresh gas feed for minimizing influence of pressure fluctuations that occur on the exhaust gas side and the fresh gas side and having an effect on exhaust gas throughput, the control means being actuated by a mechanical, pneumatic, hydraulic, magnetic or electric actuating device and a compensation device in the form of a diaphragm or a bellows to compensate for forces which act on the control means on account of a pressure difference between gas pressures on the exhaust gas side and the fresh gas side.

An exhaust gas recirculation device for recirculating exhaust gas into a gas feed to an engine, said device having an exhaust gas feed, a fresh gas feed and an outlet duct opening into the gas feed, at least the exhaust gas feed and the fresh gas feed being interconnected via a control means for metering exhaust gas, a pressure plate disposed on a side of the control means facing the fresh gas feed for minimizing influence of pressure fluctuations that occur on the exhaust gas side and the fresh gas side and having an effect on exhaust gas throughput, and a stationary impact-pressure plate disposed to prevent an exhaust gas stream flowing out of the control means from flowing directly onto the pressure plate.

An exhaust gas recirculation device for recirculating exhaust gas into a gas feed to an engine, said device having an exhaust gas feed, a fresh gas feed and an outlet duct opening into the gas feed, at least the exhaust gas feed and the fresh gas feed being interconnected via a control means for metering exhaust gas, a pressure plate disposed on a side of the control means facing the fresh gas feed for minimizing influence of pressure fluctuations that occur on the exhaust gas side and the fresh gas side and having an effect on exhaust gas throughput, the control means being prestressed in a closed direction by spring action of a diaphragm or a bellows.

An exhaust gas recirculation device for recirculating exhaust gas into a gas feed to an engine, said device having an exhaust gas feed, a fresh gas feed and an outlet duct opening into the gas feed, at least the exhaust gas feed and the fresh gas feed being interconnected via a control means for metering exhaust gas, a pressure plate disposed on a side of the control means facing the fresh gas feed for minimizing influence of pressure fluctuations that occur on the exhaust gas side and the fresh gas side and having an effect on exhaust gas throughput, and the pressure plate being designed and arranged such that the gas essentially flows through openings in the pressure plate and as little gas as possible flows around an outer circumference of the pressure plate.

An exhaust gas recirculation device for recirculating exhaust gas into a gas feed to an engine, said device having an exhaust gas feed, a fresh gas feed and an outlet duct opening into the gas feed, at least the exhaust gas feed and the fresh gas feed being interconnected via a control means for metering exhaust gas, a pressure plate disposed on a side of the control means facing the fresh gas feed for minimizing influence of pressure fluctuations that occur on the exhaust gas side and the fresh gas side and having an effect on exhaust gas throughput, the pressure plate being equipped with additional devices so that, at low exhaust gas throughput rates, the exhaust gas passes only through a narrow gap between the pressure plate and a wall of the fresh gas side, but, with increasing pressure differences, additional gas passage openings are opened.