Method of controlling powertrain of vehicle
AssigneesHyundai Motor Company, Kia Corporation
InventorJin Sung Kim
Life of this patent
Estimating the term…
Abstract
A method of controlling a powertrain of a vehicle is carried out such that during shifting in which a first clutch is released and a second clutch is engaged, whether a current shift phase is a torque phase or an inertia phase is determined. Different cost functions for the torque phase and the inertia phase are predefined. A control input change for minimizing the cost functions in the torque phase and the inertia phase is calculated. At least two among input torque, first clutch torque, or second clutch torque input to a transmission are controlled by applying the control input change calculated for the torque phase and the inertia phase.
Claims11
A method of controlling a powertrain of a vehicle, the method comprising:
- during shifting in which a first clutch is released and a second clutch is engaged,
- determining whether a current shift phase is a torque phase or an inertia phase;
- configuring different cost functions for the torque phase and the inertia phase;
- calculating a control input change for minimizing the cost functions in the torque phase and the inertia phase;
- and
- controlling at least two among input torque, first clutch torque, or second clutch torque input to a transmission by applying the control input change calculated for the torque phase and the inertia phase;
- wherein each of the cost functions is:
- min
- Δ
-
- u
-
- ∑
- j
- =
- 0
- N
- x
- -
- 1
-
- z
- i
- (
- k
- +
- j
-
- ❘
- "\[LeftBracketingBar]"
- k
- )
- -
- r
- i
- (
- k
- )
-
- Q
- 2
- +
- ∑
- j
- =
- 0
- N
- u
- -
- 1
-
-
- Δ
-
- u
- i
- (
- k
- +
- j
-
- ❘
- "\[LeftBracketingBar]"
- k
- )
-
- R
- 2
- ,
- and
- i∈{tp,ip},
- where tp indicates a torque phase, ip indicates an inertia phase,
- Nx indicates a prediction horizon,
- Nu indicates a control horizon,
- k indicates a sampling time,
- zi indicates a control variable matrix,
- ri indicates a control reference matrix,
- ui indicates a control input matrix,
- Q indicates a wweight matrix for control reference following errors, and
- R indicates a weight matrix for a control input change.
The method of claim wherein when the shift phase is the torque phase,
- the control variable matrix is:
- ztp=[αx4x5x6]T,
- where α indicates a vehicle jerk,
- x4 indicates torsion between the first clutch and a drive wheel,
- x5 indicates the first clutch torque, and
- x6 indicates the second clutch torque, and
- the control reference matrix may be:
- rtp=[0r4r5r6]T,
- where r4 indicates reference torsion between the first clutch and the drive wheel,
- r5 indicates first reference clutch torque, and
- r6 indicates second reference clutch torque.
Dependencies are inferred from the claim text.