Vehicle control apparatus

Patent metadata

Field	Value
Publication number	US-10752247-B2
Application number	US-201815938593-A
Country	US
Kind code	B2
Filing date	Mar 28, 2018
Priority date	Mar 28, 2017
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

A vehicle control apparatus includes an electric control unit that performs a preceding vehicle trading control which makes an own vehicle trail a preceding vehicle as an adaptive cruise control, and performs a first brake control which automatically applies a first braking control to the own vehicle when a time-to-collision to a target object is less than a first threshold. In a case where a performing condition for the first brake control has been determined to be satisfied during a performance of the adaptive cruise control, the electric control unit continues performing the adaptive cruise control without performing the first brake control when a deceleration control by the adaptive cruise control is being performed, whereas stops performing the adaptive cruise control when the deceleration control by the adaptive cruise control is not being performed.

First claim

The invention claimed is:

1. A vehicle control apparatus applied to an own vehicle comprising:
an electric control unit configured to:
perform, as an adaptive cruise control, a preceding vehicle trailing control which makes said own vehicle trail a preceding vehicle which is a vehicle traveling ahead of said own vehicle by calculating a target acceleration based on a distance to said preceding vehicle and a relative speed with respect to said preceding vehicle;
perform an acceleration control for accelerating said own vehicle and a deceleration control for decelerating said own vehicle so that an acceleration of said own vehicle coincides with said target acceleration;
calculate a time-to-collision to a target object positioned in a predetermined region including a traveling direction of said own vehicle based on a distance to said target object and a relative speed of said target object; and
determine that a performing condition for a first brake control which automatically applies a predetermined first braking force to said own vehicle is satisfied when said time-to-collision is less than a predetermined first threshold so as to perform said first brake control,
wherein the electric control unit is further configured to:
continue performing said adaptive cruise control when said deceleration control is being performed at a point in time when said performing condition for said first brake control has been determined to be satisfied during a performance of said adaptive cruise control;
stop performing said adaptive cruise control when said deceleration control is not being performed at said point in time; and
not to perform said first brake control when a performance of said adaptive cruise control is continued in a case where said performing condition for said first brake control is determined to be satisfied during a performance of said adaptive cruise control.

2. The vehicle control apparatus according to claim 1 , wherein,
said electric control unit is configured to:
perform, as said adaptive cruise control, an acceleration override control which accelerates said own vehicle in response to an accelerator operation by a driver of said own vehicle when a required acceleration based on said accelerator operation is greater than said target acceleration,
continue performing said adaptive cruise control when said acceleration override control is being performed at said point in time when said performing condition for said first brake control has been determined to be satisfied during a performance of said adaptive cruise control; and
stop performing said adaptive cruise control when said acceleration override control is not being performed at said point in time.

3. The vehicle control apparatus according to claim 1 , wherein,
said electric control unit is configured to:
perform said first brake control when said time-to-collision is less than said first threshold and more than or equal to a second threshold smaller than said first threshold;
determine that a performing condition for a second brake control which applies a second braking force greater than said first braking force to said own vehicle is satisfied when said time-to-collision is less than said second threshold so as to perform said second brake control; and
stop performing said adaptive cruise control when said second brake control is started during a performance of said adaptive cruise control.

4. The vehicle control apparatus according to claim 3 , wherein,
said electric control unit is configured to change said second threshold in a case when a target object, said time-to-collision thereof being less than said first threshold, is said preceding vehicle in such a manner that said second threshold becomes smaller as a lap rate becomes low, said lap rate being a value obtained by dividing a length by which said own vehicle overlaps with said preceding vehicle in a vehicle width direction of said own vehicle when assuming that said own vehicle collides with said preceding vehicle, by a vehicle width of said own vehicle.

5. The vehicle control apparatus according to claim 2 , wherein,
said electric control unit is configured to:
perform said first brake control when said time-to-collision is less than said first threshold and more than or equal to a second threshold smaller than said first threshold;
determine that a performing condition for a second brake control which applies a second braking force greater than said first braking force to said own vehicle is satisfied when said time-to-collision is less than said second threshold so as to perform said second brake control; and
stop performing said adaptive cruise control when said second brake control is started during a performance of said adaptive cruise control.

6. The vehicle control apparatus according to claim 5 , wherein,
said electric control unit is configured to change said second threshold in a case when a target object, said time-to-collision thereof being less than said first threshold, is said preceding vehicle in such a manner that said second threshold becomes smaller as a lap rate becomes low, said lap rate being a value obtained by dividing a length by which said own vehicle overlaps with said preceding vehicle in a vehicle width direction of said own vehicle when assuming that said own vehicle collides with said preceding vehicle, by a vehicle width of said own vehicle.

7. A vehicle control apparatus applied to an own vehicle comprising:
an electric control unit configured to:
perform, as an adaptive cruise control, a preceding vehicle trailing control which makes said own vehicle trail a preceding vehicle which is a vehicle traveling ahead of said own vehicle by calculating a target acceleration based on a distance to said preceding vehicle and a relative speed with respect to said preceding vehicle;
perform an acceleration control for accelerating said own vehicle and a deceleration control for decelerating said own vehicle so that an acceleration of said own vehicle coincides with said target acceleration;
calculate a time-to-collision to a target object positioned in a predetermined region including a traveling direction of said own vehicle based on a distance to said target object and a relative speed of said target object; and
determine that a performing condition for a first brake control which automatically applies a predetermined first braking force to said own vehicle is satisfied when said time-to-collision is less than a predetermined first threshold so as to perform said first brake control,
wherein said electric control unit is further configured to:
stop performing said adaptive cruise control in a case where said first brake control is started during a performance of said adaptive cruise control; and
automatically resume said adaptive cruise control when said first brake control started during a performance of said adaptive cruise control is finished in a case where said deceleration control is being performed at a point in time when said performing condition for said first brake control has been determined to be satisfied.

8. The vehicle control apparatus according to claim 7 , wherein,
said electric control unit is configured to:
perform, as said adaptive cruise control an acceleration override control which accelerates said own vehicle in response to an accelerator operation by a driver of said own vehicle when a required acceleration based on said accelerator operation is greater than said target acceleration; and
automatically resume said adaptive cruise control when said first brake control started during a performance of said adaptive cruise control is finished in a case where said acceleration override control is being performed at said point in time when said

Assignees

• Toyota Motor Co Ltd

Inventors

• Fukaya Yuki
• Ike Wataru
• Nemoto Kazuki
• Takashina Yuta
• Kaneshige Yuzo
• Tsuchida Jun
• Shimanaka Yumi
• Tanase Masayasu

Classifications

• B60W10/18

  including control of braking systems · CPC title

• B60W30/09 Primary

  Taking automatic action to avoid collision, e.g. braking and steering · CPC title

• B60W2554/80

  Spatial relation or speed relative to objects · CPC title

• B60W10/04

  including control of propulsion units · CPC title

• G08G1/166

  for active traffic, e.g. moving vehicles, pedestrians, bikes · CPC title