Patents by Inventor Ralf Zimmerschied

Ralf Zimmerschied has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240053296
    Abstract: A method for operating a wide-band lambda probe. The method includes controlling the Nernst voltage to a predefined setpoint value by setting the pump voltage and/or the pump current, measuring the pump voltage and/or the pump current and/or the lambda value, forming measured value pairs based on measured measuring values of the pump voltage, the pump current and/or the lambda value, calculating a regression line based on the measured value pairs in order to approximate a predefined part of a reference characteristic curve of the pump voltage, and ascertaining a pump current offset and/or lambda offset based on the regression line.
    Type: Application
    Filed: September 22, 2020
    Publication date: February 15, 2024
    Inventors: Bernhard Ledermann, Hanna Huber, Ralf Zimmerschied
  • Patent number: 11286836
    Abstract: A method is described for monitoring an exhaust aftertreatment system of a combustion engine, with a pressure difference sensor that captures a first pressure difference between a first sampling point and a second sampling point. A second pressure difference between the second sampling point and the environment is captured. A defect is detected based on the second pressure difference.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: March 29, 2022
    Assignee: Robert Bosch GmbH
    Inventors: Ralf Zimmerschied, Martin Stephani, Yunjie Lian
  • Publication number: 20200131970
    Abstract: A method is described for monitoring an exhaust aftertreatment system of a combustion engine, with a pressure difference sensor that captures a first pressure difference between a first sampling point and a second sampling point. A second pressure difference between the second sampling point and the environment is captured. A defect is detected based on the second pressure difference.
    Type: Application
    Filed: October 22, 2019
    Publication date: April 30, 2020
    Inventors: Ralf Zimmerschied, Martin Stephani, Yunjie Lian
  • Patent number: 9704306
    Abstract: In a method for monitoring the dynamics of gas sensors of an internal combustion engine, which gas sensors exhibit a low-pass behavior as a function of geometry, measurement principle, aging, or contamination, a dynamics diagnosis is carried out, upon a change in the gas state variable to be measured, on the basis of a comparison between a modeled and a measured signal. The parameters of the low-pass behavior are determined in direction-dependent fashion by minimizing direction-dependent error signals created by high-pass filtering and logical combination with direction-dependent saturation characteristic curves, the direction-dependent error signals being calculated by comparing the modeled and the measured signal for a rising and a falling signal component.
    Type: Grant
    Filed: January 2, 2013
    Date of Patent: July 11, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventor: Ralf Zimmerschied
  • Patent number: 9091226
    Abstract: A method for adapting a lambda control of an internal combustion engine having an exhaust gas probe disposed in an exhaust gas duct of the internal combustion engine as part of an exhaust gas monitoring system, wherein the adaptation is carried out on the basis of a comparison between a modeled and a measured signal after a predetermined change in the fuel-air ratio of an air-fuel mixture supplied to said internal combustion engine has taken place and wherein the measured signal is an actual value of an output signal of the exhaust gas probe and the modeled signal is a modal value, which is derived from the air-fuel mixture supplied to said internal combustion engine through the use of an exhaust gas model.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: July 28, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Ralf Zimmerschied, Richard Holberg
  • Publication number: 20140358355
    Abstract: In a method for monitoring the dynamics of gas sensors of an internal combustion engine, which gas sensors exhibit a low-pass behavior as a function of geometry, measurement principle, aging, or contamination, a dynamics diagnosis is carried out, upon a change in the gas state variable to be measured, on the basis of a comparison between a modeled and a measured signal. The parameters of the low-pass behavior are determined in direction-dependent fashion by minimizing direction-dependent error signals created by high-pass filtering and logical combination with direction-dependent saturation characteristic curves, the direction-dependent error signals being calculated by comparing the modeled and the measured signal for a rising and a falling signal component.
    Type: Application
    Filed: January 2, 2013
    Publication date: December 4, 2014
    Applicant: ROBERT BOSCH GMBH
    Inventor: Ralf Zimmerschied