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CONTROLLER FOR INTERNAL COMBUSTION ENGINE

  • US 20090204312A1
  • Filed: 02/09/2009
  • Published: 08/13/2009
  • Est. Priority Date: 02/08/2008
  • Status: Active Grant
First Claim
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1. A controller for an internal combustion engine in which open/close characteristics of an engine valve of each of cylinders are continuously varied by operation of a variable valve timing mechanism so that the open/close characteristics are made suitable for engine operating conditions, and in which cylinder deactivation control is performed that switches, according to the engine operating conditions, the internal combustion engine between all cylinder operation, in which all of the cylinders are operated, and cylinder deactivation operation, in which operation of part of the cylinders is stopped, which controller switches the variable valve timing mechanism between an operation allowed state and an operation inhibited state while the cylinder deactivation control is performed,wherein an engine operational region in which the cylinder deactivation operation is performed in the cylinder deactivation control is a region that is determined provided that the open/close characteristics of the engine valve are varied so that the open/close characteristics are made suitable for the engine operating conditions when the variable valve timing mechanism is in an operation allowed state, or a region that is determined provided that the open/close characteristics of the engine valve are fixed when the variable valve timing mechanism is in an operation inhibited state.

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