Abstract: A potentiometer chamber on the intake pipe wall of an internal combustion engine for containing an electrical potentiometer. The potentiometer chamber comprises a limiting wall, formed by the intake pipe wall, a sidewall extends thereto from which serves as lateral limits of the chamber. A partition made by injection molding from plastic, into which are embedded electrical contacts extends from the sidewall and a lid is placed on the partition. Therefore the limiting wall, the sidewall, the partition, and the lid form the chamber that encloses a potentiometer.

Abstract: A flow rate meter which serves to ascertain the mass of a flowing medium, in particular the flow rate of the air aspirated by an internal combustion engine via its air intake tube. The flow rate meter includes a measuring device that is pivotable about a bearing shaft in a flow conduit, in order to reduce the measurement error at maximum flow rate of the medium, a connecting conduit discharges downstream of the measuring device and its opening remote from the flow conduit leads into the damping chamber.

Abstract: A flow rate meter which serves to measure a quantity of air aspirated by an internal combustion engine via an air intake tube. The flow rate meter includes a housing, in which a flow conduit having a measuring body is disposed, the measuring body being pivotable about a bearing shaft in accordance with the flow of the medium counter to a restoring force and being joined via at least one strut to a damping body, which in the form of a movable wall defines a damping chamber with respect to the flow conduit. A retaining groove is embodied in the damping chamber wall and is form-fittingly engaged by a retaining section of an elastic stop body. A stop section of the stop body protrudes into the damping chamber and limits the movement of the damping body.

Abstract: A flow rate meter is proposed which serves to ascertain the quantity of a flowing medium particularly the quantity of air aspirated by an internal combustion engine via an air intake tube. The flow rate meter includes a measuring device pivotable in a flow channel about a support shaft downstream of which measuring device the flow channel is suddenly enlarged at several zones in order to reduce the measurement error at a maximal flow rate of the medium.

Abstract: A flow rate meter for gaseous media has a pivotable member rotating about a shaft in a conduit carrying the medium. The force of the flowing medium pivots the member against a restoring force. The constriction of the stream generates a counter force which would make the displacement non-linear unless compensated. The compensation is provided by a vane which extends into a pocket of the conduit and defines two chambers which are connected to portions of the conduit upstream and downstream of the pivoting member, respectively. In a particular application, the flow rate meter is located in the induction tube of an internal combustion engine and is provided with fuel flow channels which meter out fuel in proportion to the pivotal displacement and deliver the fuel to the air stream through one or more nozzles.

Abstract: To reliably permit closing of a switch controlling operation of a fuel supply pump which provides pressurized fuel to a fuel injection system, even under low air flow conditions in the induction pipe of an internal combustion engine, an auxiliary spring is arranged to counteract the force of a reset spring against which a deflection flap or disk in the induction pipe of the engine is deflectable. The auxiliary spring is active only over a limited range of deflection, from rest position, and immediately adjacent thereto, so that the fuel pump will not be dis-connected under low air flow conditions.