Vehicle control device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorShunsuke Urabe
Life of this patent
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Abstract
A vehicle control device for controlling a power source so as to drive a vehicle in a selected one of a plurality of modes so as to drive the vehicle in at least one power source for outputting power to a drive shaft connected to the axle, and for controlling the power source so as to gradually decrease the torque output to the drive shaft toward a required torque at the time of accelerator-off over a target lowering time, wherein the target lowering time is set to be n times the inverse of the resonance frequency of the drive system including the power source, and n is an integer equal to or greater than a value of 1 and is changed in accordance with the traveling mode.
Claims3
A vehicle control device to be used for a vehicle including at least one power source that outputs power to a drive shaft connected to an axle, the vehicle control device being configured to:
- control the power source such that the vehicle travels in one travel mode selected from a plurality of modes;
- control, at an accelerator off time, the power source such that torque output to the drive shaft gradually reduces over a target lowering time toward required torque for the accelerator off time;
- and
- set the target lowering time to n times an inverse of a resonance frequency of a drive system including the power source, wherein
- the n is an integer having a value of 1 or more, and is changed according to the travel mode,
- wherein the modes include a first mode and a second mode that emphasizes an output responsiveness of travel torque compared to the first mode, and the n is made smaller when the travel mode is the second mode than when the travel mode is the first mode, and
- wherein, in a case where the travel mode is the second mode, the n is made larger when a predetermined condition for prohibiting an immediate reduction in torque to be output to the drive shaft is met than when the predetermined condition is not met.
Dependencies are inferred from the claim text.