Abstract: An apparatus for recycling exhaust gas for reducing noxious portions in the exhaust gases of an internal combustion engine, wherein the flow of exhaust gas between an exhaust gas tapping point on the exhaust manifold and a tapping point on the intake manifold is controlled by an EGR-valve subjected to a controlled suction pressure at the intake manifold through the intermediary of a pressure converter, such that the amount of exhaust gas recycled at low engine loads is proportionately reduced in relation to engine mixture rate to provide a lower ratio of recycled gas to mixture rate at low loads as compared to the ratio at high loads.

Abstract: A control arrangement for effecting the reconveyance of exhaust gas over a larger engine operating range, while concurrently constructing the control to be more sensitive and better correlated with any particular thermal and/or mechanical operating condition of the internal combustion engine. The arrangement includes a multiple-position valve located in the conducting path of the control conduit, which is so located and constructed whereby the control pressure chamber of the control pressure chambers of the adjusting device are selectively subjected to a gas pressure and/or atmospheric pressure present in the intake conduit of the internal combustion engine upstream and/or downstream of the dosing arrangement for the combustion air or, respectively, the provided fuel-air mixture, or in the path of an accumulator associated with the control conduit.