Patents by Inventor Dennis Langervik

Dennis Langervik 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).

  • Method and system for regenerating an exhaust gas purification unit
    Patent number: 9027327
    Abstract: A method for regenerating an exhaust gas purification unit arranged in an internal combustion engine system includes setting a predefined minimum engine speed such that the exhaust gas mass flow exceeds a predefined flow value during the regeneration process. An internal combustion engine system including an exhaust gas purification unit adapted to be operated according to the method is also provided.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: May 12, 2015
    Assignee: Volvo Lasivagnar AB
    Inventors: Niclas Johnson, Marcus Steen, Frank Dennis Langervik, Paulina Ramfelt
  • METHOD AND SYSTEM FOR REGENERATING AN EXHAUST GAS PURIFICATION UNIT
    Publication number: 20100313551
    Abstract: A method for regenerating an exhaust gas purification unit arranged in an internal combustion engine system includes setting a predefined minimum engine speed such that the exhaust gas mass flow exceeds a predefined flow value during the regeneration process. An internal combustion engine system including an exhaust gas purification unit adapted to be operated according to the method is also provided.
    Type: Application
    Filed: April 16, 2010
    Publication date: December 16, 2010
    Applicant: VOLVO LASTVAGNAR AB
    Inventors: Niclas Johnson, Marcus Steen, Frank Dennis Langervik, Paulina Ramfelt
  • Flexible Exhaust Pipe Coupling
    Publication number: 20090077956
    Abstract: A device for connecting pipes in a heavy truck exhaust system includes a flexible sleeve joined to both connecting pipes and a flow guide connected or formed to an upstream pipe and extending through the flexible sleeve into the downstream pipe. The flow guide may have a frustoconical shape converging toward an outlet end with an outlet rim that flares radially outward. An inlet rim of the downstream pipe converges radially inward to prevent backflow into the joint region.
    Type: Application
    Filed: December 22, 2005
    Publication date: March 26, 2009
    Applicant: Volvo Trucks North America, Inc.
    Inventor: Dennis Langervik
  • Engine cooling system
    Patent number: 7152555
    Abstract: An improved cooling system for a turbo charged internal combustion engine is disclosed. A conduit connects a pressurizing engine air intake to the cooling system to raise the pressure in the cooling system thereby enabling an increase of the maximum temperature which coolant in the cooling system can reach. An electronically controlled valve selectively places the expansion tank in communication with the pressurizing engine air intake to maintain a desired pressure in the tank and to prevent back flow of fluid into the engine air intake.
    Type: Grant
    Filed: November 2, 2004
    Date of Patent: December 26, 2006
    Assignee: Volvo Trucks North America, Inc.
    Inventor: Dennis Langervik
  • Engine cooling system
    Patent number: 6886503
    Abstract: An improved cooling system for a turbo charged internal combustion engine is disclosed. A conduit connects a pressurizing engine air intake to the cooling system to raise the pressure in the cooling system thereby enabling an increase of the maximum temperature which coolant in the cooling system can reach.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: May 3, 2005
    Assignee: Volvo Trucks North America, Inc.
    Inventor: Dennis Langervik
  • Engine cooling system
    Publication number: 20050061264
    Abstract: An improved cooling system for a turbo charged internal combustion engine is disclosed. A conduit connects a pressurizing engine air intake to the cooling system to raise the pressure in the cooling system thereby enabling an increase of the maximum temperature which coolant in the cooling system can reach. An electronically controlled valve selectively places the expansion tank in communication with the pressurizing engine air intake to maintain a desired pressure in the tank and to prevent back flow of fluid into the engine air intake.
    Type: Application
    Filed: November 2, 2004
    Publication date: March 24, 2005
    Inventor: Dennis Langervik
  • Engine cooling system
    Publication number: 20030150407
    Abstract: An improved cooling system for a turbo charged internal combustion engine is disclosed. A conduit connects a pressurizing engine air intake to the cooling system to raise the pressure in the cooling system thereby enabling an increase of the maximum temperature which coolant in the cooling system can reach.
    Type: Application
    Filed: February 6, 2003
    Publication date: August 14, 2003
    Applicant: Volvo Trucks North America, Inc.
    Inventor: Dennis Langervik
  • Vehicle lubricant temperature control
    Patent number: 6536381
    Abstract: An oil cooling system is disclosed in the environment of an over the road vehicle having a transmission and an internal combustion engine. A primary liquid to liquid heat exchanger is connected to the engine cooling system and connected to a selected on of, or both, an engine lubricant system and the transmission for cooling circulation of oil. An auxiliary heat exchanger is connected in parallel with the primary heat exchanger for selective additional cooling circulation of the oil.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: March 25, 2003
    Assignee: Volvo Trucks North America, Inc.
    Inventor: Dennis Langervik
  • Engine cooling system
    Patent number: 6532910
    Abstract: An improved cooling system for a turbo charged internal combustion engine is disclosed. A conduit connects a pressurizing engine air intake to the cooling system to raise the pressure in the cooling system thereby enabling an increase of the maximum temperature which coolant in the cooling system can reach.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: March 18, 2003
    Assignee: Volvo Trucks North America, Inc.
    Inventor: Dennis Langervik
  • Oil maintenance indicator
    Patent number: 6484127
    Abstract: An oil maintenance indicator for recording one or more parameters indicative of when an engine oil filter has been changed. The maintenance indicator includes a sensor that measures oil pressure of an engine at start up. A comparator compares an output provided by the sensor to known parameters to determine whether the oil filter has been changed. A recorder coupled to the comparator records one or several parameters indicative of when the oil filter has been changed.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: November 19, 2002
    Assignee: Volvo Trucks North America, Inc.
    Inventor: Dennis Langervik
  • Engine cooling system
    Publication number: 20020112678
    Abstract: An improved cooling system for a turbo charged internal combustion engine is disclosed. A conduit connects a pressurizing engine air intake to the cooling system to raise the pressure in the cooling system thereby enabling an increase of the maximum temperature which coolant in the cooling system can reach.
    Type: Application
    Filed: February 20, 2001
    Publication date: August 22, 2002
    Applicant: Volvo Trucks North America, Inc.
    Inventor: Dennis Langervik
  • Vehicle lubricant temperature control
    Publication number: 20020112679
    Abstract: An oil cooling system is disclosed in the environment of an over the road vehicle having a transmission and an internal combustion engine. A primary liquid to liquid heat exchanger is connected to the engine cooling system and connected to a selected on of, or both, an engine lubricant system and the transmission for cooling circulation of oil. An auxiliary heat exchanger is connected in parallel with the primary heat exchanger for selective additional cooling circulation of the oil.
    Type: Application
    Filed: February 20, 2001
    Publication date: August 22, 2002
    Applicant: Volvo Trucks North America, Inc.
    Inventor: Dennis Langervik