Robert Boschgmbh

Markus Michels

Stefan Josten

Klaus Kaiser

Michael Brozio

Michael Ruffer

Gholamabas Esteghlal

Daniel Raichle

Johannes Meiwes

Wolfgang Schaefer

Thomas Knorpp

Thomas Daub

Michael Jiptner

Dennis Bura

Reinhard Gallert

Disclosed is a method () for ascertaining a parameter (I_avg, I_N, I_P, V_c), said parameter (I_avg, I_N, I_P, V_c) characterizes a current or a voltage in a circuit arrangement (). The circuit arrangement () comprises an inductor (L) through which an alternating choke current (I_L) flows. The method comprises the steps of: ascertaining () at least one duration (TN) between two zero crossings (N_−, N_+)+) of the choke current (I_L), or a duration (TNE) between a zero crossing (N_−, N_+)+) and an apex (E_−, E_+) of the choke current (I_L); ascertaining () the parameter (I_avg, I_N, I_P, V_c) according to the ascertained duration (TN, TNE).

Method and apparatus for ascertaining a parameter, said parameter characterizing a current or a voltage in a circuit arrangement

The invention relates to a method () for charging an intermediate circuit capacitor () in a high-voltage network (). The high-voltage network can be connected to a power source () by means of at least one switch () and is coupled to a low-voltage network () by means of a DC voltage converter (). The method comprises the steps: determining () a first voltage (U) across the power source (); determining () a second voltage (U) across the intermediate circuit capacitor (); determining () a first difference (D) between the first voltage (U) and the second voltage (U); switching () the DC voltage converter () to the boost converter operating mode to charge the intermediate circuit capacitor () according to the determined first difference (D).

Method and device for charging an intermediate circuit capacitor in a high-voltage network

The invention relates to an electrical drive system of a hybrid vehicle, comprising: a traction battery (), a high-voltage intermediate circuit (), a pulse-controlled inverter () which is coupled to the high voltage intermediate circuit (), an electrical machine () which is coupled to the pulse-controlled inverter (); a DC-to-DC converter () which is coupled to the pulse-controlled inverter () and the high-voltage intermediate circuit () and is designed to convert a high voltage (UE) from the high-voltage intermediate circuit () into a low voltage (UA) for a vehicle electrical system; a low-voltage battery () which is coupled to the DC-to-DC converter (); a plurality of selectively-connectable electrical consumers () of the vehicle electrical system, which are coupled to the low-voltage battery () and the DC-to-DC converter (); and a control device () which, in the event of a traction battery failure, is designed to operate the DC-to-DC converter () in a current-controlled manner using the electrical machine so as to supply said vehicle electrical system consumers ().

Control device for a DC-to-DC converter of an electrical drive system, and a method for operating a DC-to-DC converter

The invention relates to a throttle device to be received in the intake system of an internal combustion engine, and includes a mechanism housing for receiving an actuator that actuates a throttle valve. A lid element which can be mounted on the mechanism housing is embodied in modular form and includes an opening for receiving a sensor module, which can be positioned independently of the mounting position of the lid element on the mechanism housing relative to a bearing point.

Throttle housing comprising a modular lid element

A method for producing a throttle valve unit, which is contained in a throttle device comprised of two housing halves. A receptacle housing for an adjusting drive mechanism that actuates the throttle valve unit is formed onto the throttle device. The throttle valve unit is produced in one piece in a single operation using an injection molding process in which a frame structure is produced, which encompasses a valve surface on both sides of a valve shaft that has bearing elements.

Method for producing a throttle valve unit with integrated throttle valve

A method for producing a seal-welded connection between a stamped grid designed to conduct electricity and embedded in a laser-transparent plastic, and a plastic component positioned underneath the stamped grid, using a laser method, including the following method steps, executable in any order: a) carrying out a first welding operation by emitting laser beams, the laser beams falling on the surface of the stamped grid embedded in the plastic, at an angle &#x3b1;, and the angle &#x3b1; being inclined in a positive direction with respect to the vertical; and b) carrying out a further welding operation by emitting laser beams, the laser beams falling on the surface of the stamped grid embedded in the plastic, at an angle &#x3b1;, and the angle &#x3b1; being inclined in a negative direction with respect to the vertical.

Method for producing seal-welded connections between a stamped grid and a plastic component

An electric-motor adjusting unit for a metering system of an internal combustion engine, having an adjuster housing and an adjusting shaft rotatable therein that actuates a final control element, having a commutator motor coupled to the adjusting shaft, having a sensor for detecting the rotary position of the adjusting shaft, and having a carrier plate that can be secured in the adjuster housing, on which plate on the one hand a brush holder for the commutator motor and on the other a plug electrically connected to the brush holder and to the sensor are disposed, in order to obtain a prefabricatable assembly unit with which installation tolerances in the adjuster housing can be compensated for, the sensor being disposed on a carrier, and on the carrier and on the carrier plate, joining means corresponding with one another for joining the carrier and the carrier plate are embodied.

Electric-motor adjusting unit for a metering system of an internal combustion engine

In a device for restoring a rotary member to a defined basic position, having a three-dimensionally fixed fixation cam that predetermines the basic position and having a slaving cam, which is coupled with the rotary member and is movable past the fixation cam, of which cams, each has one stop face each on sides facing away from one another, and having a clamp spring, which embraces the cams with prestressing by way of two bent-away spring legs, in order to achieve a freedom of play in rotation between the spring legs and the cams in the basic position, at least one spring leg is countersunk, with at least one leg segment, in at least one of the cams so far that in the basic position, with a leg segment fitting over the other cam, it rests without play on the stop face of the other cam.

Device for restoring a rotary member

A throttle device in the intake section of an internal combustion engine; the throttle device including a housing part, which contains a flow cross section for an air flow. In the housing part, bearing points are provided for a throttle valve device, which can be actuated by means of an actuating drive. The actuating drive can be inserted into a receiving housing, which has first and second guide surfaces that permit the installation of the actuating drive. Fastening means are provided on the circumference surface of the receiving housing and can accommodate a closing and contacting element, which contacts electrical contacts of the actuating drive.

Throttle valve unit with drive unit receptacle and drive unit contact

The invention relates to a throttle device for controlling a fluid flow in an internal combustion engine, with a multi-part housing, whose first housing part and whose additional housing half rest against each other at contact surfaces and the fluid flow is controlled by means of a flat valve element, which can be adjusted in the flow conduit of the fluid flow by an actuating drive. The throttle device contains at least one sealing and compensation element, whose shaping of its inner wall defines the flow cross section of the fluid flow in the throttle device and which has a contact surface, which can seal cavities on its side oriented toward the housing.

Throttle devices housing with flexible compensation elements for internal combustion engines

A multipole electrical plug connector which is provided with a mating connector for a disconnectable connection having one or more contact elements, as well as electrical strip conductors which lead to the contact elements, and which jointly form a pressed screen designed as a one-piece part. The strip conductors at their free ends are provided with receptacles, into which contact elements may be plugged in. Due to a single flexibly designed pressed screen having appropriate receptacles, it is possible to cost-effectively manufacture various plug connectors having different contact element arrangements.

Universal pressed screen for various connector designs

A device for mixture preparation in internal combustion engines, in which a fluid flow flows through a flow cross section of a bore, and the fluid flow is meterable by means of an actuatable throttle element, which is pivotable in a receiving bore of a housing. Between a wall of the bore and the outer circumference of the housing, hollow chambers for a heating or cooling medium are embodied in this housing.

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Stuttgart, Germany

Markus Michels