Robert Boschgmbh

Eberhard Schoeffel

Josef Seidel

Josef Ernst

Hans Braun

Klaus Kropf

Peter Land

Fabian Lafrenz

For measuring the injection quantity (Vm) of injection systems (), in particular in internal combustion engines, test fluid () is injected by the injection system () into a measurement chamber (). To increase the precision and stability of the measurement, the volume of the measurement chamber () is kept constant during the injection. Moreover, a gas volume (Vg) is present in the measurement chamber (). The injected volume (Vm) of test fluid () is ascertained from the pressure change (dP) in the measurement chamber () that occurs upon an injection of test fluid (). The ascertainment of the injected volume (Vm) is done by means of the state equation for ideal gases.

Method, computer program, and device for measuring the amount injected by an injection system

A device is used for measuring the injection quantity of injection nozzles. It includes a measuring chamber to which the injection nozzle can be coupled. In addition, a detection device is provided, which detects a state change of the testing fluid in the measuring chamber due to an injection by the injection nozzle. In order to be able to measure the injection quantity without wear and in a highly precise manner, the invention provides that the detection device has a capacitor, whose one electrode is comprised of an electrically conductive fluid, which is at least partially contained in a volume connected to the measuring chamber. The processing unit is connected to the capacitor in such a way that it can detect a change in its capacitance, which is produced by a movement of the electrically conductive fluid.

Device and method for measuring the injection quantity of injection nozzles, especially for motor vehicles

A method and a device for measuring the angular distribution of a liquid jet ejected from a spray element (,), particularly of a fuel jet ejected from a fuel injector, is proposed. Partial spray quantities are detected by catch containers at a plurality of measuring coordinates arranged in a spatially or planarly distributed manner. The catch containers each contain a plurality of measuring coordinates, and the measurement is carried out in a multiply repeated manner using catch containers, which are rotated about an axis of rotation with different angles of rotation.

Measuring the angular distribution of a liquid spray produced by a fuel injection valve

In order to improve a device for measuring hydraulic flow quantities and leaks in a specimen, including a measurement path, embodied as an approximately vertically extending lead line to the specimen, and a capacitor sensor, which is disposed in the measurement path and can be acted upon both by at least one measuring medium and by at least one medium for generating a pressure (pressure medium) on the measuring medium in such a way that precise measurements of flow quantities and leaks are possible in a technically easily achieved way, the specimen is coupled directly to the measurement path.

Device for measuring hydraulic flow quantities and leaks in a specimen

Apparatus for measuring hydraulic flow quantities and leaks in a specimen

Valve closing body and process and device for producing sealing seats on

The apparatus for measuring a hydraulic fluid flow rate and/or leak rate through an object, particularly a valve, includes an approximately vertical measurement tube, a capacitive sensor mounted on the measurement tube, an equalization vessel extending vertically next to the measurement tube, and a source of hydraulic fluid connected to the equalization vessel and the measurement tube below the capacitive sensor and a source of a pneumatic medium connected to both the equalization vessel and the measurement tube above the capacitive sensor. Hydraulic and pneumatic valves are also provided so that hydraulic fluid can be accommodated in a lower part of the equalization vessel and pneumatic medium in an upper part. A connector tube with a connector valve is connected to the equalization vessel at about the level of the capacitive sensor so that the level of hydraulic fluid can be set at the capacitive sensor in the measurement tube at the beginning of the measurement. The capacitance rate of change is a measure of the hydraulic fluid flow or leak rate.

Growing community of inventors

Bamberg, Germany

Eberhard Schoeffel