VEHICLE CONTROL SYSTEM

• US 20130116909A1
• Filed: 07/26/2011
• Published: 05/09/2013
• Est. Priority Date: 07/29/2010
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Shida, Mitsuhisa
• Granted Patent: US 9,114,707 B2
• Time in Patent Office: Days
• US Class Current: 701/96
• CPC Class Codes: B60K 31/00 Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator fittings acting on two or more sub-units B60W30/14; speedometers G01P; systems or devices for controlling speed in general G05D13/00 ; in traffic anti-collision system for road vehicles G08G1/16
• CPC Class Codes: B60W 2556/65 Data transmitted between vehicles
• CPC Class Codes: B60W 30/16 Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
• CPC Class Codes: G08G 1/096783 where the origin of the information is a roadside individual element
• CPC Class Codes: G08G 1/16 Anti-collision systems road vehicle drive control systems for predicting or avoiding probable or impending collision otherwise than by control of a particular sub-unit B60W30/08
• CPC Class Codes: G08G 1/163 involving continuous checking
• CPC Class Codes: G08G 1/166 for active traffic, e.g. moving vehicles, pedestrians, bikes

Abstract

A vehicle control system includes a controller that is provided in a host vehicle and that controls an acceleration of the host vehicle with the smallest acceleration, from among a first required acceleration that is required based on information related to a running state of a vehicle on a road and a second required acceleration that is required based on a relative relationship between the host vehicle and at least one of a leading vehicle traveling right in front of the host vehicle and an obstacle ahead of the host vehicle, as a target acceleration.

Claims

1. A vehicle control system comprising:

a controller that is provided in a host vehicle and that controls an acceleration of the host vehicle with the smallest acceleration, from among a first required acceleration that is required based on information related to a running state of a vehicle on a road ahead of the host vehicle that is obtained via at least one of vehicle-to-vehicle communication with the vehicle and roadside-to-vehicle communication and a second required acceleration that is required based on a relative relationship between the host vehicle and at least one of a leading vehicle traveling right in front of the host vehicle and an obstacle ahead of the host vehicle and that is determined autonomously by an autonomous system, as a target acceleration,

wherein the first required acceleration is calculated based on an acceleration of a vehicle traveling ahead of the host vehicle, a speed of the vehicle traveling ahead of the host vehicle, a current speed of the host vehicle, a vehicle-to-vehicle interval calculated based on information related to the running state of the vehicle ahead of the host vehicle, and a current vehicle-to-vehicle interval.

2. The vehicle control system according to claim 1, wherein the controller obtains a target speed based on the information related to the running state, and sets the first required acceleration based on the target speed.

3. The vehicle control system according to claim 2, wherein

the information related to the running state includes a front vehicle speed that is a speed of a vehicle traveling ahead of the host vehicle;

and

the target speed is determined based on the front vehicle speed.

4. The vehicle control system according to claim 2, wherein the target speed is determined so as to inhibit congestion on the road from occurring.

5. The vehicle control system according to claim 4, wherein

the information related to the running state includes an amount of traffic on the road;

and

the target speed is determined based on a relationship between a running speed and an amount of traffic able to travel on the road.

6. The vehicle control system according to claim 2, wherein when a set vehicle speed that is a vehicle speed desired by a driver has been input, and the target speed is higher than the set vehicle speed, and the controller controls the host vehicle to run at a vehicle speed that exceeds the set vehicle speed by controlling the acceleration, the controller performs control to obtain permission from a driver beforehand to run the host vehicle at the vehicle speed that exceeds the set vehicle speed.

7. The vehicle control system according to claim 1, wherein the controller obtains a target value related to the relative relationship between the host vehicle and the leading vehicle based on the information related to the running state of the vehicle ahead of the host vehicle, and sets the first required acceleration based on the target value.

8. The vehicle control system according to claim 1, wherein the controller obtains an optimum acceleration based on the information related to the running state of the vehicle ahead of the host vehicle, and sets the first required acceleration based on the optimum acceleration.

9. The vehicle control system according to claim 8, wherein

the information related to the running state includes a front vehicle acceleration target value that is a target value of an acceleration of a vehicle traveling ahead of the host vehicle;

and

the optimum acceleration is the front vehicle acceleration target value.