Internal combustion engine with an exhaust gas turbocharger

Claim 2

A mixture-compressing internal combustion engine which includes a means for forming a fuel-air mixture, and an exhaust gas turbocharger means operatively connected with an exhaust gas system of the internal combustion engine, the exhausted gas turbocharger means including a compressor means operatively connected with an inlet system of the internal combustion engine and a turbine means, characterized in that a bleeder valve means is operatively connected to the turbine means and inlet system of the internal combustion engine, the bleeder valve means includes first means responsive to a vacuum in the inlet system for by-passing exhaust gases from the exhaust gas system about the turbine means of the exhaust gas turbocharger means during a partial load operation of the internal combustion engine, the bleeder valve means includes second means responsive to a predetermined pressure in the inlet system for limiting a maximum charging pressure of the turbocharger means during a full load operation of the internal combustion engine, wherein a shifting valve means is associated with said first means for assuring the operation of said first means solely at the partial load operation.

Claim 3

An internal combustion engine according to claim 1, wherein a throttle valve means is arranged in the inlet system, characterized in that said bleeder valve means further includes a valve member for controlling a flow of exhaust gases from the exhaust gas system, the means second for limiting the maximum charging pressure includes a spring means for normally urging the valve member into a closed postion, a movable wall means operatively connected to the valve member so as to control a positioning thereof, means communicating with the inlet system of the internal combustion engine at a position upstream of the throttle valve means for causing the wall means to be moved upon exceeding a predetermined pressure in the inlet system so as to displace the valve member into an open position, the first means includes a second movable wall means operatively connected with the valve member for controlling a positon thereof, and in that means communicating with the inlet system at a position downstream of the throttle valve means are provided for causing the second wall means to be moved upon an occurrance of a predetermined vacuum in the inlet system so as to displace the valve member into an open position.

Claim 4

An internal combustion engine according to claim 2, characterized in that both of said movable wall means are constructed as diaphragms.