Patents by Inventor Max Ryssel

Max Ryssel 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).

  • Four stroke engine, handheld work apparatus having a four stroke engine, and method for operating a four stroke engine
    Patent number: 11168593
    Abstract: A mixture-lubricated four stroke engine has a cylinder in which a combustion chamber is formed. The combustion chamber is delimited by a piston which is mounted movably in the cylinder. The engine has an intake channel which discharges into the combustion chamber via an inlet opening controlled by an inlet valve. A mixture formation unit includes at least one fuel opening which discharges into the intake channel. For the lubrication of the crankcase interior, a flow connection connects the intake channel to the crankcase interior via a connecting opening which discharges into the intake channel downstream of the mixture formation unit. The fuel quantity is controlled by a fuel valve. A control unit is configured to activate the fuel valve in a manner dependent on the position of the crankshaft such that the fuel valve is opened at least also during a part of the compression stroke.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: November 9, 2021
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Florian Schumann, Max Ryssel
  • FOUR STROKE ENGINE, HANDHELD WORK APPARATUS HAVING A FOUR STROKE ENGINE, AND METHOD FOR OPERATING A FOUR STROKE ENGINE
    Publication number: 20200173319
    Abstract: A mixture-lubricated four stroke engine has a cylinder in which a combustion chamber is formed. The combustion chamber is delimited by a piston which is mounted movably in the cylinder. The engine has an intake channel which discharges into the combustion chamber via an inlet opening controlled by an inlet valve. A mixture formation unit includes at least one fuel opening which discharges into the intake channel. For the lubrication of the crankcase interior, a flow connection connects the intake channel to the crankcase interior via a connecting opening which discharges into the intake channel downstream of the mixture formation unit. The fuel quantity is controlled by a fuel valve. A control unit is configured to activate the fuel valve in a manner dependent on the position of the crankshaft such that the fuel valve is opened at least also during a part of the compression stroke.
    Type: Application
    Filed: November 1, 2019
    Publication date: June 4, 2020
    Inventors: Florian Schumann, Max Ryssel