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US 6,687,595 B2Granted
Adaptive cruise control system for vehicle
AssigneeNissan Motor Co., Ltd.
InventorsYoji Seto, Satoshi Tange
Life of this patent
Estimating the term…
Abstract
An adaptive cruise control (ATCC) system for a host-vehicle controls one of a driving force and a brake hydraulic pressure according to a command vehicle speed calculated on the basis of an inter-vehicle distance and a host-vehicle speed. The ATCC system gradually decreases a deceleration of the host-vehicle according to an approach of the host-vehicle speed toward a control-cancel vehicle speed when the host-vehicle speed becomes lower than or equal to a gradual-deceleration starting vehicle speed during a period of decreasing the host-vehicle speed toward the control-cancel vehicle speed, so that the deceleration takes a value near zero when the host-vehicle speed reaches the control-cancel vehicle speed.
Claims16
An adaptive cruise control (ACC) system for a host-vehicle, comprising:
- a controller programmed,
- to detect an inter-vehicle distance between the host-vehicle and a preceding vehicle ahead of the host-vehicle,
- to detect a host-vehicle speed of the host-vehicle,
- to calculate a command vehicle speed on the basis of the inter-vehicle distance and the host-vehicle speed to bring the inter-vehicle distance closer to a target inter-vehicle distance,
- to control one of a driving force and a braking force according to the command vehicle speed,
- to cancel controlling one of the driving force and the braking force according to the command vehicle speed when the host-vehicle speed is lower than or equal to a control-cancel vehicle speed, and
- to gradually decrease a deceleration of the host-vehicle according to an approach of the host-vehicle speed toward the control-cancel vehicle speed when the host-vehicle speed becomes lower than or equal to a gradual-deceleration starting vehicle speed during a period of decreasing the host-vehicle speed toward the control-cancel vehicle speed, so that the deceleration takes a value near zero when the host-vehicle speed reaches the control-cancel vehicle speed.
4 more elements
An adaptive cruise control (ACC) system for a host-vehicle, comprising:
- a controller programmed,
- to detect an inter-vehicle distance between the host-vehicle and a preceding vehicle ahead of the host-vehicle,
- to detect a host-vehicle speed of the host-vehicle,
- to calculate a command vehicle speed on the basis of the inter-vehicle distance and the host-vehicle speed to bring the inter-vehicle distance closer to a target inter-vehicle distance,
- to control one of a driving force and a brake hydraulic pressure according to the command vehicle speed,
- to cancel controlling one of the driving force and the brake hydraulic pressure according to the command vehicle speed when the host-vehicle speed is lower than or equal to a control-cancel vehicle speed, and
- to gradually decrease the brake hydraulic pressure according to an approach of the host-vehicle speed toward the control-cancel vehicle speed when the host-vehicle speed becomes lower than or equal to a gradual-deceleration starting vehicle speed during a period of decreasing the host-vehicle speed toward the control-cancel vehicle speed, so that the brake hydraulic pressure takes a value near zero when the host-vehicle speed reaches the control-cancel vehicle speed.
4 more elements
An adaptive cruise control (ACC) system for a host-vehicle, comprising:
- inter-vehicle distance detecting means for detecting an inter-vehicle distance between the host-vehicle and a preceding vehicle ahead of the host-vehicle;
- host-vehicle speed detecting means for detecting a vehicle speed of the host-vehicle;
- inter-vehicle distance controlling means for calculating a command vehicle speed on the basis of the inter-vehicle distance and the host-vehicle speed to bring the inter-vehicle distance closer to a target inter-vehicle distance;
- driving/braking force controlling means for controlling one of a driving force and a braking force according to the command vehicle speed;
- and
- control canceling means for putting the inter-vehicle distance controlling means into an inoperative state when the host-vehicle speed is smaller than or equal to a control-cancel vehicle speed;
- wherein the driving/braking controlling means comprises gradual-deceleration controlling means for gradually decreasing a deceleration of the host-vehicle according to an approach of the host-vehicle speed to the control-cancel vehicle speed when the host-vehicle speed becomes lower than or equal to a gradual-deceleration starting speed during a period of decreasing the host-vehicle speed toward the control-cancel vehicle speed, so that the deceleration takes a value near zero when the host-vehicle speed reaches the control-cancel vehicle speed.
4 more elements
A method of executing an adaptive cruise control of a host-vehicle, comprising:
- detecting an inter-vehicle distance between the host-vehicle and a preceding vehicle ahead of the host-vehicle;
- detecting a vehicle speed of the host-vehicle;
- calculating a command vehicle speed on the basis of the inter-vehicle distance and the host-vehicle speed to bring the inter-vehicle distance closer to a target inter-vehicle distance;
- controlling one of a driving force and a braking force according to the command vehicle speed;
- canceling to control one of a driving force and a braking force according to the command vehicle speed when the host-vehicle speed is smaller than or equal to a control-cancel vehicle speed;
- and gradually decreasing a deceleration of the host-vehicle according to an approach of the host-vehicle speed to the control-cancel vehicle speed when the host-vehicle speed becomes lower than or equal to a gradual-deceleration starting vehicle speed during a period of decreasing the host-vehicle speed toward the control-cancel vehicle speed, so that the deceleration takes a value near zero when the host-vehicle speed reaches the control-cancel vehicle speed.
3 more elements
Dependencies are inferred from the claim text.