Patents by Inventor Michale D. Bartkowicz

Michale D. Bartkowicz 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).

  • SOLENOID CONTROL FOR VALVE ACTUATION IN ENGINE BRAKE
    Publication number: 20110120411
    Abstract: An apparatus and method for varying a counter force to valve spring preload of a brake exhaust valve to undertake engine braking, includes a solenoid controlled hydraulic actuator. A control cylinder is arranged to move with a rocker arm and a control piston is arranged to slide within the control cylinder. During engine braking the control piston slides to press the valve stem to open the brake exhaust valve. An oil chamber is arranged above the control piston and is open into the control cylinder. A source of pressurized oil is selectably introduced into the oil chamber by the solenoid controlled hydraulic actuator to slide the control piston within the control cylinder to open and hold open the brake exhaust valve.
    Type: Application
    Filed: November 23, 2009
    Publication date: May 26, 2011
    Applicant: International Engine Intellectual Property Company, LLC
    Inventors: Ying Ren, Michale D. Bartkowicz, Qianfan Xin, Martin R. Zielke, Luis Carlos Cattani