Patents by Inventor Niklas Särnberger

Niklas Särnberger 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).

  • Patent number: 11421618
    Abstract: A method for detecting valve leakage of a least one valve at a cylinder intake manifold or exhaust manifold of a vehicle engine, the method comprising: acquiring a set of pressure data points indicative of the pressure in the cylinder intake manifold or exhaust manifold for crankshaft angular positions covering crankshaft angular rotation degrees such that each of the at least one valve has opened at least one time; and determining at least one test value based on the set of pressure data points, wherein a valve leakage is detected based on a comparison of the at least one test value to a threshold value.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: August 23, 2022
    Assignee: Volvo Car Corporation
    Inventors: Andreas Storm, Niklas Särnberger, Fredrik Fridmar
  • Publication number: 20210293197
    Abstract: A method for detecting valve leakage of a least one valve at a cylinder intake manifold or exhaust manifold of a vehicle engine, the method comprising: acquiring a set of pressure data points indicative of the pressure in the cylinder intake manifold or exhaust manifold for crankshaft angular positions covering crankshaft angular rotation degrees such that each of the at least one valve has opened at least one time; and determining at least one test value based on the set of pressure data points, wherein a valve leakage is detected based on a comparison of the at least one test value to a threshold value.
    Type: Application
    Filed: March 16, 2021
    Publication date: September 23, 2021
    Inventors: Andreas Storm, Niklas Särnberger, Fredrik Fridmar
  • Publication number: 20210189984
    Abstract: The present disclosure carefully controls the heating duty cycle of a Lambda sensor, utilizing higher heating temperatures during lean phases, such as a fuel cutoff event or the like. Essentially, there is a calibration routine that is executed via software and allows a Lambda sensor to at least one of preserve full function over time and recover from an erroneous state. Advantageously, Lambda sensor life expectancy is increased accordingly. Optionally, the heating temperature for the Lambda sensor is selectively increased by increasing an applied voltage to the Lambda sensor.
    Type: Application
    Filed: December 15, 2020
    Publication date: June 24, 2021
    Inventors: Niklas Särnberger, Sasa Trajkovic, Andreas Storm, Amir Toma, Niklas Hansson