Preceding vehicle follow-up control system
AssigneeNissan Motor Co., Ltd.
InventorsAkira Higashimata, Takenori Hashizume
Life of this patent
Estimating the term…
Abstract
A vehicle follow-up control apparatus includes a distance sensor sensing an actual vehicle-to-vehicle distance from a controlled vehicle to a preceding vehicle, a vehicle speed sensor sensing an actual vehicle speed of the controlled vehicle, and a controller for calculating a desired vehicle speed to be achieved in the controlled vehicle. The desired vehicle speed is calculated in accordance with the actual vehicle-to-vehicle distance, the relative speed and a control gain which is adjusted in accordance with the relative speed.
Claims15
A vehicle follow-up control apparatus for a controlled vehicle, comprising:
- a distance sensor sensing an actual vehicle-to-vehicle distance from the controlled vehicle to a preceding vehicle;
- a vehicle speed sensor sensing an actual vehicle speed of the controlled vehicle;
- and
- a controller connected with the distance sensor and the vehicle speed sensor, the controller,
- determining an actual relative speed of the controlled vehicle relative to the preceding vehicle,
- calculating a desired vehicle speed to bring the actual vehicle-to-vehicle distance closer to a desired distance in accordance with the actual vehicle-to-vehicle distance, the desired distance and the relative speed,
- calculating a desired driving force to bring the actual vehicle speed closer to the desired vehicle speed,
- controlling an actual driving/braking force of the controlled vehicle in accordance with the desired driving force, and
- setting a control gain used in calculation of the desired vehicle speed, in accordance with the relative speed.
A vehicle follow-up control apparatus for a controlled vehicle, comprising:
- means for ascertaining a sensed actual vehicle-to-vehicle distance from the controlled vehicle to a preceding vehicle;
- means for ascertaining a sensed actual vehicle speed of the controlled vehicle;
- means for ascertaining an actual relative speed of the controlled vehicle relative to the preceding vehicle;
- means for calculating a desired vehicle speed to bring the actual vehicle-to-vehicle distance closer to a desired distance in accordance with the actual vehicle-to-vehicle distance, the relative speed and a control gain;
- means for calculating a desired driving force to bring the actual vehicle speed closer to the desired vehicle speed;
- controlling an actual driving/braking force of the controlled vehicle in accordance with the desired driving force;
- and
- means for varying the control gain in accordance with the relative vehicle speed.
A vehicle follow-up control process for a controlled vehicle, comprising:
- ascertaining a sensed actual vehicle-to-vehicle distance from the controlled vehicle to a preceding vehicle, a sensed actual vehicle speed of the controlled vehicle, and an actual relative speed of the controlled vehicle relative to the preceding vehicle;
- calculating a control gain in accordance with the actual relative speed;
- calculating a desired vehicle speed to bring the actual vehicle-to-vehicle distance closer to a desired distance in accordance with the actual vehicle-to-vehicle distance, the relative speed and the control gain;
- and
- controlling an actual driving/braking force of the controlled vehicle so as to achieve the desired vehicle speed.
Dependencies are inferred from the claim text.