Vehicle driving-force control device
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorsKeisuke Ajimoto, Masayuki Nishida, Hiroki Tanaka, Takahito Morishita, Shinya Yasunaga
Life of this patent
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Abstract
In a vehicle driving-force control device, when a brake switch is turned on, a transmission control unit determines a currently-selected engine mode and sets a deceleration determination value by referring to a determination-value table corresponding to the currently-selected engine mode, using a vehicle speed as a parameter. Then, the transmission control unit compares an absolute value of a deceleration with an absolute value of the deceleration determination value, and shifts down the gear stage if the absolute value of the deceleration exceeds the absolute value of the deceleration determination value.
Claims11
A vehicle driving-force control device comprising:
- a mode selecting unit that selects one engine mode from at least two engine modes having different engine driving-force characteristics;
- an engine control unit that controls an engine according to the one engine mode selected by the mode selecting unit, the engine control unit includes a target torque corresponding to the one engine mode selected and a target throttle opening corresponding to the target torque;
- a shift control unit that performs shift control of an automatic transmission according to a driving state of a vehicle;
- and
- an adaptive control unit that compares a deceleration of the vehicle with a preset deceleration determination value, sets a target gear stage which is one stage less than a current gear stage, and outputs a downshift command to the automatic transmission corresponding to the target gear stage if the deceleration is greater than the deceleration determination value,
- wherein the adaptive control unit includes the deceleration determination value for each of the engine modes.
A method for vehicle driving-force control comprising:
- selecting an engine mode from a plurality of engine modes having different engine driving-force characteristics;
- controlling an engine according to the selected engine mode;
- setting a target torque corresponding to the selected engine mode;
- setting a target throttle opening corresponding to the target torque;
- performing shift control of an automatic transmission according to a driving state of a vehicle;
- comparing a deceleration of the vehicle with a preset deceleration determination value;
- setting a target gear stage which is less than a current gear stage;
- and
- outputting a downshift command to the automatic transmission corresponding to the target gear stage if the deceleration is greater than the deceleration determination value.
Dependencies are inferred from the claim text.