Vehicle driving force control device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsSeiji Kuwahara, Hideaki Otsubo, Masato Kaigawa, Shogo Matsumoto, Masayuki Baba
Life of this patent
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Abstract
A shift output torque control unit executes a shift output torque control to control an engine torque so as to reduce a driving force difference, which is a variation width of a driving force due to downshift of an automatic transmission. Thus, in comparison with the case in which the shift output torque control is not executed, it is possible to smooth a variation in driving force associated with the downshift. As a result, occupants' comfort and controllability to driving operation may be improved.
Claims15
A vehicle driving force control device for a vehicle that includes an engine that is varied in output torque by an electronic throttle valve, of which opening and closing are electrically controllable, and an automatic transmission having fixed gear ratios, comprising:
- a controller that executes shift output torque control to control the output torque of the engine so as to reduce a driving force difference, which is a variation width of a driving force due to gear shift of the automatic transmission, wherein
- the controller executes the shift output torque control before gear shift of the automatic transmission, and wherein
- when it is determined that the driving force difference due to the gear shift is larger than or equal to a predetermined driving force difference determination value, the controller executes the shift output torque control again after the gear shift so as to reduce the driving force difference.
A vehicle driving force control device for a vehicle that includes an engine that is varied in output torque by an electronic throttle valve, of which opening and closing are electrically controllable, and an automatic transmission having fixed gear ratios, comprising:
- a controller that executes shift output torque control to control the output torque of the engine so as to reduce a driving force difference, which is a variation width of a driving force due to gear shift of the automatic transmission, wherein
- the controller does not execute the shift output torque control during a manual range operation in which a gear of the automatic transmission is manually fixed or a high-speed side shiftable gear of the automatic transmission is manually set.
A vehicle driving force control device for a vehicle that includes an engine that is varied in output torque by an electronic throttle valve, of which opening and closing are electrically controllable, and an automatic transmission having fixed gear ratios, comprising:
- a controller that executes shift output torque control to control the output torque of the engine so as to reduce a driving force difference, which is a variation width of a driving force due to gear shift of the automatic transmission;
- a torque converter that has a lock-up mechanism provided between the engine and the automatic transmission;
- and
- a lock-up determination unit that determines whether to be switched to a lock-up on state in which the lock-up mechanism is engaged or to a lock-up off state in which the lock-up mechanism is released, wherein
- in the lock-up on state, when the lock-up determination unit determines to be switched to the lock-up off state, the controller executes lock-up switching output torque control to control an output torque of the engine so as to reduce the driving force difference due to switching from the lock-up on state of the lock-up mechanism to the lock-up off state of the lock-up mechanism, and wherein
- in the lock-up switching output torque control, the controller increases a driving force in the lock-up on state to reach a driving force in the lock-up off state at the time when switching from the lock-up on state to the lock-up off state.
Dependencies are inferred from the claim text.