DRIVING SUPPORT DEVICE, DRIVING SUPPORT METHOD, AND DRIVING SUPPORT PROGRAM

• US 20090265072A1
• Filed: 03/19/2009
• Published: 10/22/2009
• Est. Priority Date: 04/22/2008
• Status: Active Grant

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: Ishibashi, Shiho, KONDOU, Yoshito, Miyajima, Takayuki
• Granted Patent: US 8,271,176 B2
• Time in Patent Office: Days
• US Class Current: 701/90
• CPC Class Codes: B60K 31/0066 responsive to vehicle path curvature
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 2720/10 Longitudinal speed
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration
• CPC Class Codes: B60W 30/025 related to comfort of drivers or passengers
• CPC Class Codes: G01C 21/26 specially adapted for navigation in a road network
• CPC Class Codes: G08G 1/0968 Systems involving transmission of navigation instructions to the vehicle

Abstract

An end point of a reference speed zone is obtained in which a host vehicle travels at a reference speed by controlling an adjustment amount of a drive source output of the host vehicle, without applying a preset correspondence relation regarding an accelerator pedal position and the adjustment amount of the drive source output of the host vehicle. After the host vehicle passes the end point of the reference speed zone, the adjustment amount is changed by a first degree of change if an actual adjustment amount and an adjustment amount corresponding to application of the correspondence relation with the accelerator pedal position do not coincide.

Claims

1. A driving support device comprising:

a control point obtaining unit that obtains an end point of a reference speed zone in which a host vehicle travels at a reference speed by controlling an adjustment amount of a drive source output of the host vehicle, without applying a preset correspondence relation regarding an accelerator pedal position and the adjustment amount of the drive source output of the host vehicle; and

an adjustment amount control unit that, after the host vehicle passes the end point of the reference speed zone, changes the adjustment amount by a first degree of change if an actual adjustment amount and an adjustment amount corresponding to application of the correspondence relation with the accelerator pedal position do not coincide.

2. The driving support device according to claim 1, wherein

the adjustment amount control unit, after changing the adjustment amount by the first degree of change, changes the adjustment amount by a second degree of change that is larger than the first degree of change.

3. The driving support device according to claim 2, wherein

the control point obtaining unit obtains an acceleration end point, based on a speed of the host vehicle when the host vehicle passes the end point of the reference speed zone and a target speed and target acceleration amount after passing the end point of the reference speed zone, and sets a degree-of-change changing point between the end point of the reference speed zone and the acceleration end point, and

the adjustment amount control unit changes the adjustment amount by the second degree of change following passage through the degree-of-change changing point.

4. The driving support device according to claim 3, wherein

the adjustment amount control unit changes the adjustment amount by the second degree of change, between the end point of the reference speed zone and the degree-of-change changing point, if the actual adjustment amount and the adjustment amount corresponding to the accelerator pedal position coincide and a position degree of change of the accelerator pedal following coincidence is equal to or greater than a predetermined value set in advance.

5. The driving support device according to claim 3, wherein

the adjustment amount control unit changes the adjustment amount by one of the first degree of change and the second degree of change following passage through the acceleration end point if the actual adjustment amount and the adjustment amount corresponding to the accelerator pedal position do not coincide.

6. The driving support device according to claim 4, wherein

the adjustment amount control unit changes the adjustment amount by one of the first degree of change and the second degree of change following passage through the acceleration end point if the actual adjustment amount and the adjustment amount corresponding to the accelerator pedal position do not coincide.

7. The driving support device according to claim 6, wherein

the adjustment amount control unit obtains a limit acceleration amount that does not generate slip in the host vehicle, and changes the adjustment amount by a degree of change corresponding to the limit acceleration amount if an acceleration amount acting on the host vehicle when the adjustment amount is assumed to be changed by one of the first degree of change and the second degree of change exceeds the limit acceleration amount.

8. The driving support device according to claim 2, wherein

the adjustment amount control unit obtains a limit acceleration amount that does not generate slip in the host vehicle, and changes the adjustment amount by a degree of change corresponding to the limit acceleration amount if an acceleration amount acting on the host vehicle when the adjustment amount is assumed to be changed by one of the first degree of change and the second degree of change exceeds the limit acceleration amount.

9. The driving support device according to claim 2, wherein

the adjustment amount control unit obtains a limit acceleration amount that does not generate slip in the host vehicle, and changes the adjustment amount by a degree of change corresponding to the limit acceleration amount if an acceleration amount acting on the host vehicle when the adjustment amount is assumed to be changed by one of the first degree of change and the second degree of change exceeds the limit acceleration amount.

10. The driving support device according to claim 2, wherein

the adjustment amount control unit obtains a limit acceleration amount that does not generate slip in the host vehicle, and changes the adjustment amount by a degree of change corresponding to the limit acceleration amount if an acceleration amount acting on the host vehicle when the adjustment amount is assumed to be changed by one of the first degree of change and the second degree of change exceeds the limit acceleration amount.

13. The driving support device according to claim 1, wherein

the adjustment amount control unit obtains a limit acceleration amount that does not generate slip in the host vehicle, and changes the adjustment amount by a degree of change corresponding to the limit acceleration amount if an acceleration amount acting on the host vehicle when the adjustment amount is assumed to be changed by one of the first degree of change and the second degree of change exceeds the limit acceleration amount.

11. A driving support method comprising the steps of:

obtaining an end point of a reference speed zone in which a host vehicle travels at a reference speed by controlling an adjustment amount of a drive source output of the host vehicle, without applying a preset correspondence relation regarding an accelerator pedal position and the adjustment amount of the drive source output of the host vehicle; and

after the host vehicle passes the end point of the reference speed zone, changing the adjustment amount by a first degree of change if an actual adjustment amount and an adjustment amount corresponding to application of the correspondence relation with the accelerator pedal position do not coincide.

12. A computer-readable medium encoded with a driving support program for causing a computer to execute the functions of:

obtaining an end point of a reference speed zone in which a host vehicle travels at a reference speed by controlling an adjustment amount of a drive source output of the host vehicle, without applying a preset correspondence relation regarding an accelerator pedal position and the adjustment amount of the drive source output of the host vehicle; and

after the host vehicle passes the end point of the reference speed zone, changing the adjustment amount by a first degree of change if an actual adjustment amount and an adjustment amount corresponding to application of the correspondence relation with the accelerator pedal position do not coincide.