DRIVING ASSIST APPARATUS FOR PERFORMING ASSIST ACCORDING TO DRIVER CHARACTERISTICS

• US 20170080942A1
• Filed: 09/13/2016
• Published: 03/23/2017
• Est. Priority Date: 09/18/2015
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Nakada, Yuki
• Granted Patent: US 10,017,181 B2
• Time in Patent Office: Days
• CPC Class Codes: B60W 2050/0075 Automatic parameter input, automatic initialising or calibrating means
• CPC Class Codes: B60W 2540/30 Driving style
• CPC Class Codes: B60W 2552/30 Road curve radius
• CPC Class Codes: B60W 2554/00 Input parameters relating to objects
• CPC Class Codes: B60W 2556/10 Historical data
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration
• CPC Class Codes: B60W 30/18145 Cornering
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: B60W 50/0098 Details of control systems ensuring comfort, safety or stability not otherwise provided for

Abstract

The driving assist apparatus includes a controller configured to control a decelerator included in a host vehicle to perform driving assist. The controller acquires information on the shape of a road ahead of the host vehicle in the traveling direction. When it is determined based on the acquired shape of the road that there is a curve ahead of the host vehicle in the traveling direction and driving assist is executed through control of the deceleration of the host vehicle by the decelerator, the controller controls the maximum value of deceleration of the host vehicle so as to coincide with the target deceleration value.

Claims

1. A driving assist apparatus comprising:

a controller configured to control a decelerator included in a host vehicle to perform driving assist,

wherein the controller is configured to;

acquire information on a shape of a road ahead of the host vehicle in a traveling direction;

when it is determined, based on the acquired shape of the road, that there is a curve ahead of the host vehicle in the traveling direction,

measure and store a maximum value of deceleration, based on sensor signals from an acceleration sensor included in the host vehicle, the deceleration being caused in the host vehicle as a result of a driving operation performed by a driver on a straight road located before a start point of the curve;

calculate an average of the stored maximum values of deceleration as a target deceleration value being used during execution of the driving assist through control of the deceleration of the host vehicle by the decelerator; and

when it is determined, based on the acquired shape of the road, that there is the curve ahead of the host vehicle in the traveling direction, and that driving assist is executed through control of the deceleration of the host vehicle by the decelerator,

execute the control of the deceleration such that the maximum value of deceleration of the host vehicle coincides with the target deceleration value.

2. The driving assist apparatus according to claim 1,

wherein the controller is configured to measure the maximum value of deceleration on condition that the distance of the straight road to the start point of the curve is equal to or more than a predetermined distance.

3. The driving assist apparatus according to claim 1,

wherein the controller

acquires information on whether there is an obstacle ahead of the host vehicle in the traveling direction, and

when there is an obstacle on the straight road to the start point of the curve ahead of the host vehicle in the traveling direction,

does not measure the maximum value of deceleration.

4. The driving assist apparatus according to claim 1,

wherein the controller is configured to measure the maximum value of deceleration on condition that an operation of driving assist to control deceleration of the host vehicle by the decelerator is not being executed.

5. The driving assist apparatus according to claim 1,

wherein when the controller acquires information indicating that the driver performs an operation to decelerate or accelerate the host vehicle while the controller is performing driving assist through control of deceleration of the host vehicle by the decelerator, the controller stops the operation of driving assist.

6. The driving assist apparatus according to claim 1,

wherein the controller is further configured to

acquire an identification information of a current driver,

store the calculated target deceleration value in association with the identification information of the current driver, and

execute the control such that the maximum value of deceleration of the host vehicle coincides with the target deceleration value associated with the identification information of the current driver when the controller executes driving assist through control of deceleration of the host vehicle by the decelerator.

7. The driving assist apparatus according to claim 1,

the controller is configured to

acquire information on a weather condition and/or visibility surrounding the host vehicle, and

correct the target deceleration value or a timing to start the driving assist based on the acquired information.

8. The driving assist apparatus according to claim 7,

wherein the controller is further configured to reduce the target deceleration value in accordance with the weather condition or the visibility.

9. The driving assist apparatus according to claim 1,

wherein the controller is further configured to move start timing of the driving assist to an earlier point in accordance with the weather condition or the visibility.

10. The driving assist apparatus according to claim 9,

wherein the controller is further configured to reduce distance to keep the maximum deceleration during performing the driving assist.

11. A vehicle comprising the driving assist apparatus according to claim 1.

12. A driving assist method for a host vehicle comprising steps of:

acquiring, by a computer, information on a shape of a road ahead of the host vehicle in a traveling direction;

determining, by the computer, based on the acquired shape of the road, whether there is a curve ahead of the host vehicle in the traveling direction, and if so, measuring and storing, by the computer, a maximum value of deceleration, based on sensor signals from an acceleration sensor included in the host vehicle, the deceleration being caused in the host vehicle as a result of a driving operation performed by a driver on a straight road located before a start point of the curve, and calculating, by the computer, an average of the stored maximum values of deceleration as a target deceleration value being used during execution of the driving assist through control of the deceleration of the host vehicle by the decelerator; and

determining, by the computer, based on the acquired shape of the road, whether there is the curve ahead of the host vehicle in the traveling direction and driving assist is executed through control of the deceleration of the host vehicle by the decelerator, and if so, executing, by the computer, the control of the deceleration such that the maximum value of deceleration of the host vehicle coincides with the target deceleration value.