Abstract: A fuel injection valve is proposed for fuel injection systems of internal combustion engines, which serves to supply fuel into the intake tube of the engine. The injection valve includes a movable valve element which cooperates with a fixed valve seat, downstream of which are provided horizontal fuel guidance bores which discharge tangentially into a spin chamber. The spin chamber is disposed so that it widens conically in the flow direction. The fuel guidance bores simultaneously serve as metering bores. The spin chamber causes an axial speed component to be imparted to the fuel entering via the fuel guidance bores. As a result, the dwell time of the metered fuel within the spin chamber is short, and even in the case of quite short injection pulses, the fuel is still sufficiently well prepared.

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: An air flow measurement apparatus is proposed for measuring the air quantity aspirated by internal combustion engines, which has at least one temperature-dependent resistor disposed in the air flow, whose temperature and/or resistance is controlled in accordance with the flow rate to provide a controller output as a gauge for the quantity of the medium. The apparatus includes a flow restriction, which is preferably formed in plate-like configuration with a wedge-shaped cross section and the narraw tip facing into the air flow and is disposed in the flow downstream of the temperature-dependent resistor in such a manner that in the event of a flow reversal, such as during backfiring in the intake manifold of an internal combustion engine, the flow restriction reduces the flow velocity in the vicinity of the temperature-dependent resistor.

Abstract: A fuel injection apparatus is proposed for mixture-compressing, externally ignited internal combustion engines which serves to apportion a quantity of fuel corresponding to the aspirated air quantity and to effect good preparation of the fuel-air mixture. The fuel injection apparatus comprises a fuel apportionment valve which is actuatable by means of an air flow rate meter arranged in the air induction tube of the internal combustion engine and an arbitrarily actuatable throttle valve arranged downstream of the air flow rate meter. The air flow rate meter has a circular control body, which is rotatably arranged on a bearing shaft with its outer circumference facing in the opposite direction to the air flow and, being transversely arranged with respect to the air induction tube, opens to a greater or lesser degree an aperture which defines the air induction tube cross-sectional area. The air flow rate meter is moved against a return force in accordance with the air quantity flowing therethrough.