Control method of hybrid vehicle
AssigneesKia Motors Corporation, Hyundai Motor Company
InventorsSang Joon Kim, Seong Ik Park
Life of this patent
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Abstract
A control method of a hybrid vehicle that includes engages a second clutch and in response outputs a torque through an output shaft that is connected to the second carrier via torque supplied from an engine and a first and second motor-generators. Accordingly, the speed of the engine is controlled via the first motor-generator, and a torque of an output shaft is control via the second motor-generator. Accordingly, the second motor-generator is used to control an operating point of the engine so that a base motor torque is effectively set.
Claims13
A control method of a hybrid vehicle that includes a first planetary gear having a first sun gear, a first planetary gear, a first ring gear, and a first carrier, a second planetary gear set having a second sun gear, a second planetary gear, a second ring gear, and a second carrier, an engine connected to the first carrier via a first output shaft, a first motor-generator configured to rotate the first ring gear, a second motor-generator connected to the second sun gear to rotate the second sun gear and the first sun gear, a first brake configured to brake the first ring gear, a second brake configured to brake the second ring gear, a first clutch selectively connecting the first ring gear with the first carrier, and a second clutch selectively connecting the first carrier with the second ring gear, the method comprising:
- engaging, by a control unit installed in the vehicle, a second clutch;
- outputting torque through a second output shaft that is connected to the second carrier, the torque supplied from the engine and the first and second motor generators;
- controlling, by a control unit installed in the vehicle, the speed of the engine by using the first motor-generator;
- and
- controlling, by a control unit installed in the vehicle, the torque of the output shaft by using the second motor-generator.
A non-transitory computer readable medium containing program instructions executed by a processor or controller, the computer readable medium comprising:
- program instructions that engage a second clutch in a hybrid vehicle power train system to output torque through a second output shaft that is connected to the second carrier, the torque supplied from the engine and the first and second motor generators;
- program instructions that control the speed of the engine by using the first motor-generator;
- and
- program instructions that control the torque of the output shaft by using the second motor-generator.
A non-transitory computer readable medium containing program instructions executed by a processor or controller, the computer readable medium comprising:
- program instructions that engage a second clutch in a hybrid vehicle power train system to output torque through a second output shaft that is connected to the second carrier, the torque supplied from the engine and the first and second motor generators;
- program instructions that control the speed of the engine by using the first motor-generator wherein a target torque for a speed control of the first motor-generator is calculated by Formulas 4, 5, and 6 below:
- τ
- MG
-
-
- 1
- SpdContrl
- =
- τ
- MG
-
-
- 1
- F
- /
- F
- +
- τ
- MG
-
-
- 1
- F
- /
- B
- Formula
-
-
- 4
- τ
- MG
-
-
- 1
- F
- /
- F
- =
- K
- F
- /
- F
- ,
- ENG
- EVT
-
-
- 2
-
- (
- -
- R
- 1
- 1
- +
- R
- 1
- +
- R
- 2
- )
-
- τ
- ENG
- +
- K
- F
- /
- F
- ,
- MG
-
-
- 2
- EVT
-
-
- 2
-
- (
- -
- R
- 1
-
- R
- 2
- 1
- +
- R
- 1
- +
- R
- 2
- )
-
- τ
- MG
-
-
- 2
- Formula
-
-
- 5
- τ
- MG
-
-
- 1
- F
- /
- B
- =
- f
- PI
- EVT
-
-
- 2
-
- (
- ω
- MG
-
-
- 1
- Target
- -
- ω
- MG
-
-
- 1
- )
- ;
- Formula
-
-
- 6
- and
- program instructions that control the torque of the output shaft by using the second motor-generator based on Formula 3 below,
- τ
- out
- =
- (
- 1
- +
- R
- 2
- )
-
- T
- MG
-
-
- 2
- -
- 1
- +
- R
- 2
- R
- 1
-
- T
- MG
-
-
- 1
- ,
- wherein a target torque for a torque control of the second motor-generator is calculated by a Formula 8 below:
- τ
- MG
-
-
- 2
- Base
- =
- 1
- 1
- +
- R
- 2
-
- τ
- out
- Demand
- +
- 1
- R
- 1
-
- τ
- MG
-
-
- 1
- .
- Formula
-
-
- 8
Dependencies are inferred from the claim text.