Patents by Inventor Sten Jiewertz

Sten Jiewertz 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: 20090145717
    Abstract: A holder for a sensor body for a position sensor. The holder has a holder housing. A circular cylindrical recess with a bottom in the holder housing. A head is connected to one end of the sensor body and the head is adapted, concentrically and by being to a limited extent tiltable from a normal position, to being accommodated and fastened in the cylindrical recess. A compression spring between the head and the bottom of the recess operable to flexibly to preload the head toward a normal position. To ensure that the sensor body cannot permanently change position in the recess and does not risk being subject to wear against a cooperating sensor body, the head has the shape of a central spherical segment with a diameter corresponding to the diameter of the recess and the compression spring is a flat wire spring.
    Type: Application
    Filed: December 1, 2005
    Publication date: June 11, 2009
    Inventors: Magnus Hagberg, Sten Jiewertz
  • Patent number: 6029631
    Abstract: A combustion engine comprises at least two combustion chambers and an ignition system having a spark device (11, 13) forming an electrode gap and a charging member (20) for accumulating the electrical energy necessary for generating a spark in the electrode gap. The combustion chambers are in the compression stroke according to a predetermined sequence. During a first engine revolution, high voltage pulses are supplied at a high frequency to all spark devices (11, 13). The spark voltage in the electrode gap of each spark device (11, 13) is measured for each spark. Based on the measured spark voltage of the different spark devices, the combustion chamber that first will be in the compression stroke is determined by means of an electronic control unit (3). Based on the predetermined sequence and the knowledge of the combustion chamber that first is in the compression stroke, fuel is injected in the combustion chamber that next will be in the compression stroke.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: February 29, 2000
    Assignee: Saab Automobile AB
    Inventors: Sten Jiewertz, Jan Eckerborn
  • Patent number: 5214919
    Abstract: In order to be able to modify in a simple manner the response of a supercharged internal combustion engine as a function of the engine load, an arrangement is proposed in which the driver may regulate the charge air pressure build-up by means of a manual setting control. The manual setting control is connected to an electronic control unit which, as a function of detected engine parameters, controls the supercharging pressure with respect to desired values stored in the control unit. As a function of the adjusted position of the setting control, a reduction of the charge air pressure which is dependent on the engine load is effected. In this way, the driver can choose which response the engine will have for partial load ranges, where it is possible either to have full charge air pressure at all throttle positions or a gradual increase of the charge air pressure on increasing throttle opening.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: June 1, 1993
    Assignee: Saab Automobile Aktiegbolag
    Inventors: Sten Jiewertz, Mats Eriksson
  • Patent number: 4862093
    Abstract: The invention relates to a method and an arrangement for detecting ionizing current in an ignition circuit incorporated in the ignition system of an internal combustion engine, in which a measuring voltage is applied to the ignition circuit in at least one secondary winding, and in which a measuring device is used to detect the possible presence of an ionizing current in the ignition circuit. A low measuring voltage is applied during an engine start sequence, or alternatively, no measuring voltage at all, and a high measuring voltage is applied subsequent to the engine start. The invention thereby overcomes the problem existing when measuring ionizing currents of the spark plugs becoming coated with soot deposits as a result of the electrical voltage field which always exists between the electrodes of respective plugs. Such problem is particularly troublesome during an engine start sequence, since the deposits can prevent the engine from starting.
    Type: Grant
    Filed: August 25, 1988
    Date of Patent: August 29, 1989
    Assignee: Saab-Scania AB
    Inventor: Sten Jiewertz