Deceleration control system for a vehicle
AssigneeToyota Motor Engineering & Manufacturing North America, Inc.
InventorCraig A. Cauthen
Life of this patent
Estimating the term…
Abstract
A system for decelerating a hybrid vehicle, the system includes a continuously variable transmission (CVT), a brake pedal, an accelerator pedal, a sensor for detecting a vehicle deceleration, a memory for storing a target deceleration corresponding to a coasting deceleration of the vehicle, and a processor. When the brake pedal and the accelerator pedal are released, the vehicle coasts. If the vehicle deceleration does not match the target deceleration, the processor adjusts the torque output by the CVT so that the vehicle deceleration substantially matches the target deceleration.
Claims25
A system for controlling deceleration of a vehicle comprising:
- a continuously variable transmission (CVT);
- a sensor configured to detect a plurality of vehicle speeds;
- and
- a processor coupled to the CVT and the sensor and configured to:
- determine a vehicle deceleration based on the plurality of vehicle speeds,
- determine a target deceleration based on at least one of the plurality of vehicle speeds and a current gear ratio of the CVT, the target deceleration corresponding to a coasting deceleration of the vehicle, and
- adjust a torque output by the CVT so that the vehicle deceleration substantially matches the target deceleration when no braking or acceleration is being requested.
A system for controlling deceleration of a vehicle comprising:
- a continuously variable transmission (CVT) configured to operate in a plurality of gear ratios;
- a first sensor configured to detect a vehicle deceleration;
- a second sensor configured to detect a vehicle speed;
- and
- a processor coupled to the CVT, the first sensor and the second sensor and configured to:
- determine a target deceleration based on the vehicle speed and which of the plurality of gear ratios the CVT is currently operating in, the target deceleration corresponding to a coasting deceleration of the vehicle, and
- adjust a torque output by the CVT so that the vehicle deceleration substantially matches the target deceleration when no braking or acceleration is being requested and the vehicle speed is within a predetermined range.
A method for controlling deceleration of a vehicle comprising:
- detecting a vehicle deceleration;
- detecting a vehicle speed;
- determining a current gear ratio of a continuously variable transmission (CVT);
- determining a target deceleration based on the vehicle speed and the current gear ratio of the CVT, the target deceleration corresponding to a coasting deceleration of the vehicle;
- comparing the vehicle deceleration with the target deceleration;
- determining a target torque that, when applied, will cause the vehicle deceleration to be substantially equal to the target deceleration;
- and
- applying the target torque.
A system for controlling deceleration of a vehicle comprising:
- at least one of an engine or a motor-generator configured to generate a supply torque;
- a continuously variable transmission (CVT) coupled to the at least one of the engine or the motor-generator;
- a sensor configured to detect a vehicle speed;
- and
- a processor coupled to the CVT, the sensor and the at least one of the engine or the motor-generator and configured to:
- determine a target deceleration based on the vehicle speed, the target deceleration corresponding to a coasting deceleration of the vehicle, and
- adjust a torque output by the CVT by instructing the at least one of the engine or the motor-generator to adjust the supply torque so that the vehicle deceleration substantially matches the target deceleration when no braking or acceleration is being requested.
Dependencies are inferred from the claim text.