×

Method and apparatus for preventing locking of engine-operating-characteristic changing device

  • US 20030000485A1
  • Filed: 06/19/2002
  • Published: 01/02/2003
  • Est. Priority Date: 06/28/2001
  • Status: Active Grant
First Claim
Patent Images

1. A method of controlling an engine-operating-characteristic changing device that changes a compression ratio of an intake air of an internal combustion engine of a vehicle, the engine-operating-characteristic changing device being operable between a first operating state that provides a first compression ratio and a second operating state that provides a second compression ratio that is lower than the first compression ratio, the engine-operating-characteristic changing device including a locking unit for locking the engine-operating-characteristic changing device in the first operating state;

  • the method comprising the steps of;

    determining whether there is a possibility that the engine-operating-characteristic changing device is locked in the first operating state by the locking unit when the engine-operating-characteristic changing device is not to be placed in the first operating state; and

    when it is determined that there is the possibility, preventing the locking unit from locking the engine-operating-characteristic changing device in the first operating state.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×