Control apparatus for variable valve actuation system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorAkira Eiraku
Life of this patent
Estimating the term…
Abstract
An ECU calculates a target working angle r, and determines a difference between the target working angle r and the previous value r′ of target working angle as a change rate v to be feedforward controlled. Further, the ECU determines a deviation to be corrected by feedback control from the target working angle r and an actual value that is input from a sensor as a hypothetical rate u. The change rate v and the hypothetical rate u are added together, and a control amount to be output, for example, a voltage E is determined by referring to a three-dimensional map M3 from the added set change rate (v+u) and the input target working angle r.
Claims11
A control apparatus for a variable valve actuation system for an internal combustion engine, in which engine a quantity of a valve state of at least one valve of an intake valve and an exhaust valve is changed by an actuator, comprising:
- calculating means for calculating a change degree of the quantity of the valve state based on a comparison between a target quantity of the valve state set according to an engine operating state and a target quantity of the valve state set in the past;
- and
- control amount calculating means for determining an anticipated control amount of said actuator based on said calculated change degree.
A method for controlling a variable valve actuation system for an internal combustion engine, in which engine a quantity of a valve state of at least one valve of an intake valve and an exhaust valve is changed by an actuator, comprising:
- calculating a change degree of the quantity of the valve state based on a comparison between a target quantity of the valve state set according to an engine operating state and a target quantity of the valve state set in the past;
- and
- determining an anticipated control amount of said actuator based on said calculated change degree.
Dependencies are inferred from the claim text.