Control arrangement for mixture compressing combustion engines

Abstract

A control arrangement for mixture compressing injection combustion engines with an air metering arrangement. For metering the fuel quantity in relation to the air quantity, there is provided a pivotable flap in the air suction line upstream of an arbitrarily actuated butterfly valve. This pivotable flap is urged by a spring in the closing direction. The flap is located outside the flow cross section in the suction line wall, and responds to the difference between pressures acting upstream and downstream of the flap. The flap also controls a device for metering the fuel quantity with a part of the flap representing the pivotable wall of a chamber located outside the flow cross section of the air suction line. A connection is provided from the chamber to the suction line downstream of the flap. A support axis upstream of the flap region determines the air flow cross section on the end of the flap facing away from the flap region, with the wall extending between this flap region and the support axis. The wall has an effective working surface which is larger than the flow cross section of the air suction line. The flap, furthermore, has at least one side wall with a curve track on which a lever is guided by a roller, and is located on an axis of the device for metering the fuel quantity.