Vehicular control system
AssigneeDenso Corporation
InventorKatsuhiko Kawai
Life of this patent
Estimating the term…
Abstract
In an air-fuel ratio control system, a gain Kh is adaptively determined on the basis of a value z obtained by multiplying a target fuel amount difference value Δym (derivative value of a target fuel amount) by an error e between a target excess fuel ratio (target φ) and an actual excess fuel ratio (actual φ) detected by an air-fuel ratio sensor. A value obtained by multiplying the target fuel amount difference value Δym by the gain Kh is determined as an F/F corrected value ucmp. In this case, when the error e between the target φ and the actual φ is determined in consideration of the fact that a controlled system has dead time d, a target φd at the point in time going back in the past by the amount of the dead time d is used to obtain error e=target φd−actual φ.
Claims10
A vehicular control system that conducts feedforward control so that a controlled value of a controlled system disposed in a vehicle is made to follow a target value, the vehicular control system comprising:
- gain calculating means for adaptively determining a gain based on a value obtained by multiplying a derivative value of the target value by the error between the target value and the actual controlled value;
- and
- feedforward corrected value calculating means for determining, as a feedforward corrected value, a value obtained by multiplying the gain by the derivative value of the target value.
A vehicular control system that conducts feedforward control so that a controlled value of a controlled system disposed in a vehicle is made to follow a target value, the vehicular control system comprising:
- gain calculating means for adaptively determining a gain based on a value obtained by multiplying a derivative value of the target value by the sum of the error between the target value and the actual controlled value and an integral value of that error;
- and
- feedforward corrected value calculating means for determining, as a feedforward corrected value, a value obtained by multiplying the gain by a difference value between the target value and a value of a first-order lag of the target value.
A vehicular control system that conducts feedforward control so that a controlled value of a controlled system disposed in a vehicle is made to follow a target value, the vehicular control system comprising:
- gain calculating means for adaptively determining a gain based on a value obtained by multiplying a derivative value of the target value by the error between the target value and the actual controlled value;
- first-order lag time constant calculating means for adaptively determining a first-order lag time constant of the target value on the basis of a value obtained by multiplying a previous feedforward corrected value by the error between the target value and the actual controlled value;
- and
- feedforward corrected value calculating means for determining, as a feedforward corrected value, a value obtained by multiplying the gain by a difference value between the target value and the value of the first-order lag of the target value calculated using the first-order lag time constant.
Dependencies are inferred from the claim text.