×

System and method for controlling engine operation

  • US 20060011159A1
  • Filed: 07/13/2005
  • Published: 01/19/2006
  • Est. Priority Date: 05/14/2002
  • Status: Abandoned Application
First Claim
Patent Images

1. A method of operating an engine having a cylinder, an intake valve associated with the cylinder and moveable between a first position where the intake valve prevents a flow of fluid relative to the cylinder and a second position where the intake valve allows a flow of fluid relative to the cylinder, a cam assembly connected to the intake valve to move the intake valve between the first and second positions, and an actuator connected to the intake valve, comprising:

  • sensing at least one operating parameter of the engine;

    operating the engine in a first mode wherein the cam assembly begins to move the intake valve from the first position toward the second position when the piston is at or near a top dead center position of an intake stroke and wherein the cam assembly returns the intake valve to the first position when the piston is at or near a bottom dead center position of the intake stroke, the engine operating in the first mode in response to the sensed operating parameter being at one of a predetermined first set of conditions; and

    operating the engine in a second mode wherein the cam assembly begins to move the intake valve from the first position toward the second position when the piston is at or near a top dead center position of an intake stroke and wherein the actuator prevents the intake valve from returning to the first position in response to the cam assembly, the engine operating in the second mode in response to the sensed operating parameter being one of a predetermined second set of conditions.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×