Vehicle control device and vehicle control method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsGen Inoue, Yasuhito Ishida
Life of this patent
Estimating the term…
Abstract
A vehicle control device for controlling the driving force and braking force that is applies to a vehicle to maintain a target wheel speed includes: a plurality of determination parts each of which determines the wheel speed of a corresponding one of a plurality of wheels of the vehicle; a calculation part that calculates the wheel speed validity threshold for each wheel based on the determined wheel speeds; a decision part that decides whether the wheel speed validity threshold calculated for each wheel is below a specific threshold speed; a setting part that resets the target wheel speed depending on the result of the decision by the decision part; and an estimation part that estimates the vehicle speed based on the determined wheel speeds.
Claims8
A vehicle control device that is applied to a vehicle to approach a target wheel speed, the vehicle control device comprising:
- a plurality of wheel speed sensors, each of which determines a wheel speed of a corresponding one of a plurality of wheels of the vehicle;
- a calculation part that calculates a wheel speed validity threshold for each wheel based on the determined wheel speed;
- a decision part that decides whether each wheel speed is valid depending on whether the calculated wheel speed validity threshold of each wheel is below a specified threshold speed;
- a setting part that resets the target wheel speed to a speed that is higher than one of the wheel speed validity thresholds calculated for the wheels depending on the result of the decision by the decision part;
- and
- an estimation part that estimates the vehicle speed based upon the determined target wheel speed if the calculated wheel speed validity thresholds are determined to be all valid, and estimates the vehicle speed based upon the reset target wheel speed if at least one of the calculated wheel speed validity thresholds is determined to be invalid.
A vehicle control device that is applied to a vehicle to maintain a target wheel speed, the vehicle control device comprising:
- a plurality of means for determining a wheel speed of a plurality of wheels of the vehicle, each of which determines the wheel speed of a corresponding one of the plurality of wheels of the vehicle;
- means for calculating a wheel speed validity threshold for each wheel based on the determined wheel speed;
- means for deciding whether each wheel speed is valid depending on whether the calculated wheel speed validity threshold for each wheel is below a specified threshold speed;
- means for resetting the target wheel speed to a speed that is higher than one of the wheel speed validity thresholds calculated for the wheels depending on the result of the decision by the means for deciding;
- and
- means for estimating the vehicle speed based upon the determined target wheel speed if the calculated wheel speed validity thresholds are determined to be all valid, and based upon the reset target wheel speed if at least one of the calculated wheel speed validity thresholds is determined to be invalid.
A vehicle control method that is applied to a vehicle to maintain a target wheel speed, the vehicle control method comprising:
- determining wheel speeds of a plurality of wheels of the vehicle;
- calculating on a processor a wheel speed validity threshold for each wheel based on the determined wheel speed;
- deciding whether each wheel speed is valid depending on whether the calculated wheel speed validity threshold for each wheel is below a specified threshold speed;
- resetting the target wheel speed to a speed higher than one of the wheel speed validity thresholds calculated for the wheels depending on the result of the decision;
- and
- estimating the vehicle speed based upon the determined target wheel speed if the calculated wheel speed validity thresholds are determined to be all valid, and the reset target wheel speed if at least one of the calculated wheel speed validity thresholds is determined to be invalid.
Dependencies are inferred from the claim text.