Siemens Aktiengesellschaft

Continental Automotive Gmbh

Siemens Aktiengesell Schaft

Achim Przymusinski

Dirk Heinitz

Andreas Hartke

Christian Birkner

Ralf Schernewski

Rainer Hirn

Ralf Böhnig

Christian Stahl

Richard Pirkl

Walter Schrod

Klaus Wenzlawski

Arno Friedrich

Hartmut Wolpert

Mark Elliott

Thomas Brandmeier

Johannes Feder

Thomas Rader

Detlev Schoeppe

Frank Queisser

Wolfgang Östreicher

Andreas K&auml;rcher

Ralf B&ouml;hnig

Andreas Schiergl

A method for generating operating software on a control device for a motor vehicle by executing control software in a production line end computer or in the control device, has the following steps: a) Executing a diagnosis function in the motor vehicle, with which the configuration of the motor vehicle can be established so that the functions to be performed by the control device () are clearly defined, b) Selecting only from among the necessary software components from an external data source (), so that the configuration of the motor vehicle can be mapped with the operating software on the control device (), and c) Generating the component-individual operating software on the control device () by inclusion of the selected software components.

Method for the generating operating software on a control device for a motor vehicle as well as control device

Disclosed is a method for the characteristic map-based obtention of values for at least one control parameter of an installation, particularly an internal combustion engine. According to the inventive method, support points for the control parameter, which provide a value for the control parameter, are defined across a range of operational parameters within a characteristic map () in accordance with operational parameters of the installation, the range of operational parameters covered in said characteristic map is divided into a first and a second subdomain which comprises several of the support points, and the value for the control parameter is obtained by extrapolation when a boundary of the first subdomain is reached before the value for the control parameter is obtained by accessing support points of the second subdomain.

Method for the characteristic map-based obtention of values for a control parameter of an installation

In a method for the diagnosis of a sensor, in particular a pedal-travel sensor of a motor vehicle, a first signal (S) and at least one second equivalent signal (S) are delivered. If the second signal (S) is time-delayed with respect to the first signal (S), at least the previous curve of the first signal (S) and/or the previous curve of the second signal (S) is taken into account.

Method and device for diagnosis of a sensor

With a method for converting a fuel quantity (MF) into a torque (TQ) in an internal combustion engine, the efficiency (H) of the internal combustion engine is determined at the current operating point prior to the conversion as the ratio of actual torque (TQ) and actual fuel quantity (MF), and the required torque (MF) is determined from the efficiency (H) and the fuel quantity (MF).

Method for converting a fuel quantity into a torque

In a method for detecting rotational speed of an internal combustion engine (), a sector wheel () which is driven by the internal combustion engine () is scanned, the run of a specific segment of the sector wheel is detected, the duration of said segment-run is measured and a rotational speed value is determined therefrom, the duration of the run a specific segment is re-measured, a relative variation between two consecutive segment-runs is determined and the rotational speed value is determined therefrom.

Method for detecting rotational speed

In a method for detecting rotational speed of an internal combustion engine (), a sector wheel () which is driven by the internal combustion engine () is scanned, the throughflow of a specific segment of the sector wheel is detected, the duration of said segment-throughflow is measured and a rotational speed value is determined therefrom. Additionally, the throughflow of a specific part of the segment is detected before and after determination of the rotational speed value and a gradient of the duration of the partial segment throughflow is determined in order to update the rotational speed value.

Electronic circuit arrangement for controlling at least one actuator, in particular for controlling the valves and/or the injectors of an injection system of an internal combustion engine, having at least one driver circuit ( ) with a control input (control line , control line ) and a resetting input (RESET) for electrically controlling the actuator as a function of the data which is incoming at the control input (control line , control line ), a control unit ( ) which is connected at the output end to the resetting input (RESET) via a resetting line and to the control input (control line , control line ) of the driver circuit ( ) via a control line, and having a signal input (Kl ) which is connected internally to the control unit ( ) for the external connection of a switching element, the control unit ( ) placing the driver circuit ( ) in a predefined state when the switching element is activated via the resetting line, the signal input for the switching element being connected to the resetting input (RESET) of the driver circuit ( ) via a signal path ( ) while passing the control unit ( ).

Electronic circuit configuration and corresponding method for controlling actuators such as valves or injectors

A device for determining a start of injection in a direct-injection internal combustion engine has a magnetoelastic pressure sensor disposed in an injection line leading to an injection valve which detects pressure changes in the injection line owing to an injection process of the injection valve by utilizing the magnetoelastic effect. The device also has an evaluation device that determines a dead time between an initiation of the injection process and the start of injection with the aid of the measurement signal of this magnetoelastic pressure sensor.

Device and method for determining the start of injection in a direct-injection internal combustion engine

The energy conversion during a combustion process is computed from the body sound signal of the internal combustion engine according to a theoretical model, and from it the amount of fuel delivered is derived. If the computed amount of fuel differs from the predetermined amount of fuel, a malfunction of the fuel injection system is recognized.

Method for monitoring an injection system

A capacitive actuator is driven with a control signal st. The duration ti of actual actuator actuation is compared with the duration t of the control signal st. Proper operation is determined, and the actuator is assumed to be operating correctly, if the measured duration ti is within a range determined by the duration t of the control signal.

Method of checking a capacitive actuator

Pressure fluctuations occurring during two sequential injections (for example a pre-injection and a main injection) within a working cycle of a cylinder in a lead to the injector are taken into account with the aid of a correction term. A drive time of the injectors is determined with the aid of a corrected pressure so that a desired fuel quantity is injected. The correction term is determined with the aid of a least-squares estimator that estimates the injection pressure at the nozzle of injector as a function of the geometrical data of the system, in particular a length of the lead from the rail to the injector and physical boundary conditions, for example a fuel temperature.

Method for determining the injection time in a direct-injection internal combustion engine

The values for the speed of the crankshaft are corrected by means of an acausal mean-value filter, and the change in the kinetic energy of the crankshaft in the expansion interval of a cylinder is calculated from the dynamically corrected speed values and referred to the maximum fuel quantity which can be fed in this interval. The dimensionless residue obtained therefrom represents for the cylinder under consideration a measure of too much or too little injected fuel. Correction terms are derived from the calculated residues for the injection times of the individual cylinders. This renders adaptation possible in the overall region of the characteristic diagram, in particular also in the case of speed transitions.

Method for cylinder equalization in an internal combustion engine operating by direct injection

A method for the closed-loop control of a nonlinear controlled system in which a state variable of the controlled system is determined and an actuating value is determined using a control method and a reference variable. In addition, by using the state variable of the controlled system, a correction value is read from a linearization characteristic curve and multiplied by the actuating value and the product is specified as new desired value for the controlled system. The linearization characteristic curve is chosen in such a way that multiplication of the linearization characteristic curve by the nonlinear control action of the controlled system yields a linear control action.

Method for the closed-loop control of a controlled system, in particular of an internal combustion engine

A method for detecting a preinjection picks up and evaluates a vibration signal which occurs when a nozzle needle strikes a needle seat of an injector of a direct-injection internal combustion engine operating with a preinjection and a main injection. A sensor for structure-borne noise is provided on the cylinder outer wall for detecting the vibration signal. Based on the evaluation of the vibration signal a conclusion is made on the presence or absence of the preinjection in a combustion cycle. A device for detecting a preinjection is also provided.

Method and device for detecting a preinjection in an internal combustion engine

A method of starting an internal combustion engine having an injection system and characteristic variables includes the steps of supplying an injection system with an operating parameter that is determined from characteristic variables, supplying a speed regulator with an initialization value as an initial starting variable, and regulating a speed of an internal combustion engine up to an idling speed with the speed regulator based upon the initialization value. The acceleration to idling speed is carried out with the aid of the speed regulator based on the initialization value. The injection system is supplied with a mass of fuel to be injected. Regulation is carried out with a speed regulator already present in an engine controller. The initialization value is stored in a characteristic curve as a function of coolant temperature. The initialization value is applied to a first injection operation of the internal combustion engine.

Growing community of inventors

Lappersdorf, Germany

Achim Przymusinski