×

VALVE WORKING ANGLE VARIABLE SYSTEM

  • US 20120158267A1
  • Filed: 01/15/2010
  • Published: 06/21/2012
  • Est. Priority Date: 01/15/2010
  • Status: Active Grant
First Claim
Patent Images

1. A valve working angle variable system, comprising:

  • an actuator that calculates an operation quantity necessary for achieving a valve working angle commanded by a command unit based on a relationship between a valve working angle and an operation quantity stored in the actuator, and performs an operation, whereinthe command unit gives the actuator a command for an operation mode, and stores a relationship between the valve working angle and a parameter correlated to this valve working angle for the commanded operation mode,the actuator transmits values of the valve working angle and the parameter recognized by the actuator to the command unit, and the command unit determines whether or not the transmitted two values satisfy the relationship between the two values stored in the command unit, andwhen a negative result is derived from the determination, at least one of notification of abnormality and stopping operation of the actuator is performed.

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