Vehicle control apparatus

• US 8,600,657 B2
• Filed: 07/28/2009
• Issued: 12/03/2013
• Est. Priority Date: 09/19/2008
• Status: Active Grant

• Current Assignee: Hitachi Astemo Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Inventors: Saito, Shinjiro, Yokoyama, Atsushi, Sugawara, Toshiharu, Yoshida, Tatsuya, Takahashi, Akira
• Primary Examiner(s): Jabr, Fadey
• Assistant Examiner(s): INGRAM, THOMAS P
• Application Number:
  US12/920,396
• Publication Number:
  US 20110187515A1
• Time in Patent Office: 1,589 Days
• Field of Search: 701/23, 701/28, 701/36, 701/41, 701/42, 701/48, 701/301, 700/215, 700/255
• US Class Current: 701/301
• CPC Class Codes: B60T 2201/08 Lane monitoring; Lane Keeping Systems
• CPC Class Codes: B60T 7/22 initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle , or by means of contactless obstacle detectors mounted on the vehicle
• CPC Class Codes: B60W 2540/18 Steering angle
• CPC Class Codes: B60W 2552/30 Road curve radius
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 2720/406 between left and right wheel
• CPC Class Codes: B60W 30/09 Taking automatic action to avoid collision, e.g. braking and steering
• CPC Class Codes: B60W 30/0956 the prediction being responsive to traffic or environmental parameters
• CPC Class Codes: B60W 30/12 Lane keeping
• CPC Class Codes: B62D 15/0265 Automatic obstacle avoidance by steering

Abstract

According to conventional art, if there is an obstacle on the left of a vehicle, a control threshold value is set so as to avoid the obstacle. If the control threshold value is exceeded, the vehicle is controlled in accordance with a deviation quantity so as to return to a position where the control threshold avoids being exceeded. However, even if a risky oncoming vehicle is approaching the vehicle on the right, the vehicle is controllably moved toward the oncoming vehicle. Thus, disadvantageously, a driver has a sense of fear or discomfort. A vehicle control apparatus according to the present invention includes a calculation section configured to calculate a first risk level present on the left of the vehicle and a second risk level present on the right of the vehicle, a setting section configured to set a first control threshold for the left of the vehicle based on the first risk level and to set a second control threshold for the right of the vehicle based on the second risk level, a change section configured to change at least one of the first and second control thresholds based on the first and second risk levels, and a control section configured to control the vehicle based on the changed control threshold.

Claims

1. A vehicle control apparatus comprising:

sensors; and

a controller that receives input from the sensors, the controller including;

a calculation section configured to calculate a first risk level present on a left of a vehicle and a second risk level present on a right of the vehicle;

a setting section configured to set a first control threshold for the left of the vehicle based on the first risk level and to set a second control threshold for the right of the vehicle based on the second risk level; and

a change section configured to change at least one of the first and second control thresholds based on the first and second risk levels, wherein

the first risk level indicates a distribution of a probability at which the vehicle collides against a first object present on the left of the vehicle,

the second risk level indicates a distribution of a probability at which the vehicle collides against a second object present on the right of the vehicle, and

the change section changes the first control threshold value such that a position indicated by the first control threshold value is closer to the first object as the second risk level increases, and changes the second control threshold value such that a position indicated by the second control threshold value is closer to the second object as the first risk level increases.

2. The vehicle control apparatus according to claim 1, further comprising a deceleration section configured to decelerate the vehicle if the first or second control threshold value is set and if a distance between the vehicle and the first object or a distance between the vehicle and the second object is equal to or smaller than a predetermined value,

wherein if the vehicle is traveling at a predetermined speed or lower, the change section changes at least one of the first and second control threshold values.

3. The vehicle control apparatus according to claim 1, further comprising an alarm section configured to alarm a driver if the first or second control threshold value is set and if a distance between the vehicle and the first object or a distance between the vehicle and the second object is equal to or smaller than a predetermined value,

wherein if the vehicle is traveling at a predetermined speed or lower, the change section changes at least one of the first and second control threshold values.

4. The vehicle control apparatus according to claim 1, further comprising a determination section configured to determine whether or not to change the second control threshold value based on the first risk level and to determine whether or not to change the first control threshold value based on the second risk level,

wherein the change section changes at least one of the first and second control threshold values based on determination made by the determination section.

5. The vehicle control apparatus according to claim 4,

wherein if the vehicle exceeds the changed control threshold, a control quantity is changed from the control quantity observed before the change in the control threshold or a different actuator is used for the control.

6. The vehicle control apparatus according to claim 1,

wherein if the vehicle exceeds the changed control threshold, a control quantity is changed from the control quantity observed before the change in the control threshold or a different actuator is used for the control.