Patents by Inventor Tiby M. Martin

Tiby M. Martin 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).

  • High pressure electronic common rail fuel injector and method of controlling a fuel injection event
    Patent number: 5605134
    Abstract: A fuel injector which, under the control of the engine ECM, may control the shape of the fuel injection event profile. Such control is achieved by varying the magnitude of a control current applied to the injector. The control current in turn varies the bias force applied to a needle valve in the injector nozzle, thereby changing the shape of the injection event profile in proportion to the amount of control current applied. In a preferred embodiment, control of the bias force is achieved by placing a piezoelectric actuator between the needle valve and a bias spring. The length of the piezoelectric actuator changes in proportion to the amount of control current applied thereto, thereby changing the bias force applied to the needle valve. The profile is preferably altered in relation to engine speed.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: February 25, 1997
    Inventor: Tiby M. Martin
  • High pressure electronic common-rail fuel injection system for diesel engines
    Patent number: 5339786
    Abstract: A fuel injection system having a novel electromagnetic actuated fuel pump in which four pumping elements, equally-spaced around a camshaft are mounted such that a pair of opposed pumping elements alternate to deliver pressure to a high pressure common rail with a second pair of the pumping pair of pumping elements. In one embodiment of the invention, the pumping process is mechanically actuated, and in another is electronically actuated. The high pressure common rail is adapted to reduce surges in the fuel pressure from the pump by using central and side chambers connected with cross-drilled orifices. The common rail has a relief valve for safety protection not to allow the pressure in the rail to exceed the maximum preset pressure. The electromagnetic injector has a pressure balanced control valve to control fuel flow to the nozzle and has a pressure assistance mechanism at the end of injection to obtain a sharp end of injection.
    Type: Grant
    Filed: November 23, 1993
    Date of Patent: August 23, 1994
    Inventor: Tiby M. Martin
  • High pressure electronic common-rail fuel injection system for diesel engines
    Patent number: 5311850
    Abstract: A fuel injection system having a novel electromagnetic actuated fuel pump in which four pumping elements, equally-spaced around a camshaft are mounted such that a pair of opposed pumping elements alternate to deliver pressure to a high pressure common rail with a second pair of the pumping pair of pumping elements. In one embodiment of the invention, the pumping process is mechanically actuated, and in another is electronically actuated. The high pressure common rail is adapted to reduce surges in the fuel pressure from the pump by using central and side chambers connected with cross-drilled orifices. The common rail has a relief valve for safety protection not to allow the pressure in the rail to exceed the maximum preset pressure. The electromagnetic injector has a pressure balanced control valve to control fuel flow to the nozzle and has a pressure assistance mechanism at the end of injection to obtain a sharp end of injection.
    Type: Grant
    Filed: May 3, 1991
    Date of Patent: May 17, 1994
    Inventor: Tiby M. Martin
  • High pressure electronic common-rail fuel injection system for diesel engines
    Patent number: 5109822
    Abstract: A fuel injection system having a novel electromagnetic-actuated fuel pump in which four pumping elements, equally-spaced around a camshaft are mounted such that a pair of opposed pumping elements alternate to deliver pressure to a high pressure common rail with a second pair of pumping elements. In one embodiment of the invention the pumping elements are mechanically actuated, in another they are electronically actuated. The high pressure common rail is adapted to reduce surges in the fuel pressure from the pump up to levels of 20,000 psi. The common rail has a relief valve for controlling the maximum pressure in the common rail chamber. The electromagnetic injection nozzle has a needle valve that is closed by pressure in a balancing chamber having a reduced pressure level less than that of the pressure required to open the valve.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: May 5, 1992
    Inventor: Tiby M. Martin
  • High pressure electronic common-rail fuel injection system for diesel engines
    Patent number: 5035221
    Abstract: A fuel injection system having a novel electromagnetic-actuated fuel pump in which four pumping elements, equally-spaced around a camshaft are mounted such that a pair of opposed pumping elements alternate to deliver pressure to a high pressure common rail with a second pair of pumping elements. In one embodiment of the invention the pumping elements are mechanically actuated, in another they are electronically actuated. The high pressure common rail is adapted to reduce surges in the fuel pressure from the pump up to levels of 20,000 psi. The common rail has a relief valve for controlling the maximum pressure in the common rail chamber. The electromagnetic injection nozzle has a needle valve that is closed by pressure in a balancing chamber having a reduced pressure level less than that of the pressure required to open the valve.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: July 30, 1991
    Inventor: Tiby M. Martin