Adaptive cruise control system
AssigneeHitachi, Ltd.
InventorsTaisetsu Tanimichi, Kimihiro Yamai, Yuichi Kuramochi, Hidefumi Adachi, Eiichirou Kondou, Kentarou Ueno, Takafumi Suzuki
Life of this patent
Estimating the term…
Abstract
After cruise control is restored by an accelerating operation, the driver set speed is changed according to the displacement of the accelerator pedal. It becomes possible to reduce the driver set speed due to release of the accelerator pedal, that is, the vehicle can be decelerated by the engine. Even if the cruise control is restored, the cruise control is not conducted and the vehicle can be decelerated by the engine if the driver wants to decelerate the vehicle by the release of the accelerator pedal.
Claims38
An adaptive cruise control system, comprising:
- a vehicle speed control amount calculating unit for calculating a vehicle speed control amount according to a driver set speed set in advance by a driver via a pedal and a vehicle speed of the vehicle, to equalize the vehicle speed of the vehicle to the driver set speed;
- a control unit for controlling an accelerating unit and a decelerating unit according to the vehicle speed control amount;
- a measuring unit for measuring a following distance for the vehicle to follow a target vehicle and a relative speed of the vehicle with respect to the target vehicle;
- a target following distance calculating unit for calculating a target following distance according to the following distance and the relative speed of the vehicle with respect to the target vehicle and the vehicle speed of the vehicle, wherein the target following distance differs as between periods when the pedal is depressed and periods when it is not depressed;
- a following distance control amount calculating unit for calculating a following distance control amount to equalize the following distance to the target following distance;
- and
- a control unit for controlling an accelerating unit and a decelerating unit to accelerate or to decelerate the vehicle speed of the vehicle according to the vehicle speed control amount, wherein
- the driver set speed is changed according to displacement of the pedal,
- acceleration or deceleration of the vehicle is controlled according to the following distance control amount when a target vehicle is sensed, and
- acceleration or deceleration of the vehicle is controlled according to the vehicle speed control amount when a target vehicle is not sensed.
A vehicle speed control system for controlling a host vehicle, comprising:
- storing means for storing a set speed set by a driver;
- detecting means for detecting a running speed of the host vehicle;
- and
- control means for controlling the host vehicle to equalize the running speed to the set speed;
- wherein the set speed is changed according to displacement of an accelerator pedal of the host vehicle.
Dependencies are inferred from the claim text.