Liebherr Machines Bulle Sa

Richard Pirkl

Konrad Christ

Francois Masson

Wolfram Klemp

Edgar Bignion

A controller for a common-rail injection system includes a plurality of fuel injectors, a common fuel supply line for the fuel injectors, a high-pressure pump for supplying the common fuel supply line with fuel, and a pressure sensor for determining the pressure in the common fuel supply line. A determination unit evaluates data of the pressure sensor and, from the pressure drop caused by an injection in the common fuel supply line, determines the fuel quantity actually injected during this injection or a value derived therefrom. An adaption unit uses the results of the determination unit in order to adapt the actuation of the fuel injectors. The determination unit carries out at least one test injection, and the actually injected fuel quantity or a value derived therefrom is effected by way of the test injection or injections.

Controller for a common-rail injection system

A controller for an injection system having a plurality of fuel injectors includes a map controller. From a desired injection value, the map controller generates a control value for actuating a fuel injector with reference to a specified map. A determination unit determines the actual injection value for at least one injection made, and an adaption unit uses results from the determination unit in order to adapt actuation of the fuel injectors. The adaption unit determines an adaption value for injector actuation from the at least one actual injection value. In engine operation, the adaption unit receives the control values generated by the map controller as input. From this input, the adaption unit generates adapted actuation values as output by applying a mathematical function to the control values generated by the map controller. The at least one adaption value is included in the first mathematical function as parameter.

Controller for an injection system

The present invention shows a high-pressure injector having the following assemblies: an injector unit (), a drive unit () for driving the injector unit (), preferably a high-pressure storage unit () for supplying the injector unit () with fuel, and a high-pressure connection (). Provision is made in this respect that the high-pressure injector has a housing () in which a plurality of the named assemblies are arranged behind one another in the longitudinal direction of the injector, wherein the housing () completely envelops at least one of the named assemblies, in particular the drive unit () and/or the high-pressure storage unit (). The high-pressure injector with the injector unit can be used in all types of internal combustion engines, preferably in diesel engines.

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Bulle, Switzerland

Richard Pirkl