Andreas Stihl Ag Co. Kg

Felix Mayer

Wolfgang Layher

Georg Maier

Arno Kinnen

Sebastian Hanussek

Tobias Deigendesch

Michael Schneider

Jens Peter Ramler

Hiroyuki Oka

Hideki Watanabe

Manuel Dangelmaier

Patrick Levien

Michael Dietenberger

Christopher Tost

Takumi Nonaka

Sebastian HANUßEK

Jens Ramler

George Maier

Hediki Watanabe

A generator provides a supply voltage for an electrical consumer. It includes an internal combustion engine driving the generator. An electrical control unit has an incoming electrical line for supplying an operating voltage thereto. The control unit further has at least one outgoing electrical line. The outgoing electrical line is connected to at least one operating unit that is necessary for operating the internal combustion engine. In order to switch off the internal combustion engine in the event of an increased CO concentration in the vicinity of the generator, a breaker is arranged in an electrical line of the control unit. The breaker is controlled by a CO sensor, which is designed to open the breaker and interrupt the electrical line when a predeterminable CO limit value is exceeded.

Internal combustion engine with a generator and a carbon monoxide sensor

A work apparatus has a work tool driven by a combustion engine. A brake assembly has a brake element for braking the work tool as it slows down. In a braking position of the brake assembly, the work tool is braked, while, in a stand-by position of the brake assembly, the brake element enables the movement of the work tool. The brake element is held in the stand-by position by a holding force from an electromagnet supplied with energy by an electric generator driven by the engine, for which purpose, in the stand-by position of the brake assembly, a holding current is supplied to the electromagnet. To extend the holding time as the engine slows down, an operating parameter of the engine is monitored and, after a limit value of the operating parameter is reached, the holding current supplied to the electromagnet is reduced.

Work apparatus having an electromagnetic brake assembly

A solenoid valve for a fuel system has an electric coil and an armature disposed in a housing. A preassembled valve unit with valve seat, valve member, valve spring, and armature plate connected captively to each other is provided. In the valve unit, the valve seat is loosely secured between valve member and armature plate. The valve unit is inserted and secured in an open housing end and the valve spring contacts an inner shoulder of the housing. Armature plate and armature form a magnetic circuit. The valve member is supported on the armature plate and switched to open and close an outlet of the valve seat. By suppling current, a magnetic field is generated in the armature and attracts the armature plate into an operative valve position. The valve spring returns the armature plate into a rest position when the coil is currentless.

Solenoid valve for a fuel system

A method is for activating an electromagnetic valve including a valve seat and a valve body. The valve body is movable between a first and the second position (A, B) via an electric drive coil. The drive coil is connected to a control device which as a function of a setting variable (S) energizes the drive coil with a signal sequence consisting of control signals in order to move the valve body. The control device as a function of the setting variable (S) sets a predetermined signal amplitude and/or a predetermined signal duration of the control signals. It is provided that at least one control signal of the signal sequence is formed with an amplitude superelevated above the predetermined signal amplitude and/or with a signal duration extended beyond the predetermined signal duration.

Method for activating an electromagnetic valve

An electromagnetic valve has a valve chamber which has an inflow opening for supplying a liquid and an outlet for discharging the liquid. The valve includes a valve seat and a valve member that is assigned to the valve seat. The fluidic connection between the inflow opening and the outlet of the valve is interrupted when a valve seat is closed by the valve member. The valve member is held on an armature plate which is moved by an electromagnetic drive unit toward an end stop which is formed by a first stop surface. In order for the operative capability of the valve to be guaranteed in the case of wear on the end stop, the armature plate is assigned a second stop surface which upon a predefined wear on the first stop surface forms a downstream end stop.

Electromagnetic valve

An electromagnetic fuel valve has a valve chamber, a valve element and a valve seat assigned to the valve element. The valve chamber is delimited by an electromagnetic drive which moves the valve element relative to the valve seat. The drive includes a receiving housing for a coil carrier with an electrical coil. A magnet core is inserted into the coil carrier and has an end section facing the valve element. At an open sealing end facing toward the valve chamber, a sealing element is arranged between the end section of the magnet core and the receiving housing. To achieve good sealing, that end section of the magnet core situated in the sealing element expands the sealing element and compresses the material thereof radially against the edge of the sealing end of the receiving housing to seal the valve chamber to the interior space of the receiving housing.

Electromagnetic fuel valve

A handheld work apparatus includes a fuel tank, into which a flexible fuel line projects. A suction head is arranged at the free end of the fuel line. The suction head is connected via the fuel line to a fuel supply device of an internal combustion engine of the work apparatus. The suction head has at least one weight member. The weight member is formed at least partially as a magnet to achieve good cleaning of the fuel without a substantial increase in the weight of the work apparatus.

Handheld work apparatus and suction head for connection to a fuel line in a handheld work apparatus

A hand-guided work apparatus includes a combustion engine to drive a work tool. The combustion engine includes a crankcase () in which a crankshaft () is rotatably mounted about a rotational axis (). A pressure sensor () and a temperature sensor () are arranged on the crankcase (). The pressure sensor () and the temperature sensor () are arranged in a common sensor housing (). In the typical put-down position () of the work apparatus, the pressure sensor () and the temperature sensor () are arranged below a plane () which is parallel to the horizontal storage surface () and contains the rotational axis () of the crankshaft (). A connecting channel () is formed in the sensor housing (). The connecting channel () connects the pressure sensor () to the crankcase interior () and the base () of the connecting channel () slopes down toward the crankcase interior () in the typical put-down position () of the work apparatus.

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Waiblingen, Germany

Felix Mayer