Driving force control device for a vehicle

• US 10,005,457 B2
• Filed: 09/15/2016
• Issued: 06/26/2018
• Est. Priority Date: 10/27/2015
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kanou, Takeshi
• Primary Examiner(s): Tran, Khoi H
• Assistant Examiner(s): Nguyen, Robert T
• Application Number:
  US15/266,383
• Publication Number:
  US 20170113681A1
• Time in Patent Office: 649 Days
• CPC Class Codes: B60W 2510/1005 Transmission ratio engaged
• CPC Class Codes: B60W 2520/16 Pitch
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: B60W 30/02 Control of vehicle driving stability
• CPC Class Codes: B60W 30/025 related to comfort of drivers or passengers
• CPC Class Codes: B60W 30/20 Reducing vibrations in the driveline
• CPC Class Codes: B60Y 2300/207 related to drive shaft torsion, e.g. driveline oscillations
• CPC Class Codes: F16H 63/50 Signals to an engine or motor

Abstract

A vibration suppression torque calculation means calculates a vibration suppression torque for suppressing a sprung vibration. An upper/lower limit value setting means is configured to set, based on a gear ratio of a transmission, upper and lower limit values whose absolute values are increased as the gear ratio is increased. An upper/lower limit restriction means calculates a final vibration suppression torque acquired by using the upper and lower limit values to impose upper/lower limit restriction on the vibration suppression torque. An addition unit sets a value acquired by adding the final vibration suppression torque to a driver required torque to a target torque.

Claims

1. A driving force control device for a vehicle, comprising:

a drive device comprising a travel driving source and a transmission and being configured to transmit a driving torque of the travel driving source to a wheel via the transmission, to thereby drive the wheel;

vibration suppression torque calculation means for calculating a vibration suppression torque for suppressing a sprung vibration to be generated on a vehicle body;

upper/lower limit restriction means for imposing an upper/lower limit restriction on the calculated vibration suppression torque such that the vibration suppression torque falls within a range limited by upper and lower limit values;

target torque calculation means for calculating a target torque by adding the vibration suppression torque subjected to the upper/lower limit restriction to a driver required torque, which is set based on an accelerator operation performed by a driver;

driving torque control means for controlling a driving torque of the drive device based on the target torque;

gear ratio acquisition means for acquiring a gear ratio of the transmission at a current time; and

upper/lower limit value setting means for setting, based on the acquired gear ratio, absolute values of the upper and lower limit values so as to be increased as the gear ratio is increased.

2. A driving force control device for a vehicle according to claim 1, wherein the upper/lower limit value setting means is configured to set the upper and lower limit values respectively by multiplying driving source vibration suppression torque upper and lower limit values, which are upper and lower limit values of the vibration suppression torque permitted to be generated in the travel driving source, by the acquired gear ratio.