Driving assistance apparatus

• US 8,521,410 B2
• Filed: 06/29/2011
• Issued: 08/27/2013
• Est. Priority Date: 07/01/2010
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Mizuno, Yusuke, Yamada, Kazunao, Sakuma, Yasushi
• Primary Examiner(s): Algahaim, Helal A
• Application Number:
  US13/171,776
• Publication Number:
  US 20120004839A1
• Time in Patent Office: 790 Days
• Field of Search: 701/123, 701/410, 701/423, 701/439
• US Class Current: 701/123
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/12 using control strategies taking into account route information estimation or calculation of non-directly measurable driving parameters B60W40/00
• CPC Class Codes: B60W 2510/0623 Fuel flow rate
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2530/209 Fuel quantity remaining in tank
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2552/15 Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 2552/20 Road profile, i.e. the change in elevation or curvature of a plurality of continuous road segments
• CPC Class Codes: B60W 2555/60 Traffic rules, e.g. speed limits or right of way
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: B60W 50/082 Selecting or switching between different modes of propelling
• CPC Class Codes: B60W 50/14 Means for informing the driver, warning the driver or prompting a driver intervention
• CPC Class Codes: G01C 21/3697 Output of additional, non-guidance related information, e.g. low fuel level G01C21/3679 takes precedence

Abstract

A driving assistance apparatus mounted to a vehicle is provided. The driving assistance apparatus includes: an information acquisition component configured to acquire information on at least one of a route condition in a predetermined region of a future travel path of the vehicle, a present vehicle condition, and a past operation condition; a prediction component configured to predict, based on the information acquired by the information acquisition component, whether fuel efficiency of the vehicle is degraded in the future travel path; and a notification component configured to notify an operation for improvement of the fuel efficiency of the vehicle to an occupant of the vehicle in advance in cases where the fuel efficiency of the vehicle is predicted to be degraded in the future travel path.

Claims

1. A driving assistance apparatus mounted to a vehicle that travels by using a driving power source including at least one of an internal combustion engine and a motor, the driving assistance apparatus comprising:

an information acquisition component configured to acquire information on both of a route condition in a predetermined region of a future travel path of the vehicle and a present vehicle condition;

a prediction component configured to predict, based on the information acquired by the information acquisition component, whether fuel efficiency of the vehicle will be degraded in the future travel path; and

a notification component configured to notify an operation for improvement of the fuel efficiency of the vehicle in the future travel path to an occupant of the vehicle in advance in cases where the fuel efficiency of the vehicle is predicted to be degraded in the future travel path,

wherein;

the prediction component determines, based on the information acquired by the information acquisition component, whether a stop point, at which the vehicle is required to make a stop, is present in the future travel path of the vehicle, and whether the vehicle is presently accelerating while traveling toward the stop point;

the prediction component predicts that the fuel efficiency of the vehicle will be degraded in the future travel path, and the notification component gives the occupant of the vehicle a notification prompting suppression of present acceleration of the vehicle to reduce future needless energy consumption, when the prediction component determines that both

(i) a stop point, at which the vehicle is required to make a stop, is present in the future travel path of the vehicle and

(ii) the vehicle is presently accelerating while traveling toward the stop point.

2. The driving assistance apparatus according to claim 1, wherein:

the driving assistance apparatus is mounted to the vehicle that travels by using the motor as the driving power source; and

when the prediction component determines, based on the information acquired by the information acquisition component, that

(i) the future travel path of the vehicle contains an intermittent driving section where the vehicle repeatedly makes a stop and a low-speed running, and

(ii) a remaining battery level of a battery, the battery supplying electric power to the motor, becomes smaller than a predetermined lower limit in the intermittent driving section,

the prediction component predicts that the fuel efficiency of the vehicle is degraded in the future travel path and the notification component issues a notification prompting an operation for reduction of consumption of the electric power of the battery.

3. The driving assistance apparatus according to claim 1, wherein:

the driving assistance apparatus is mounted to the vehicle that travels by using the internal combustion engine and the motor as the driving power source; and

when the prediction component determines, based on the information acquired by the information acquisition component, that

(i) the future travel path of the vehicle contains a regenerative charge possible section where a regenerative charging of a battery, the battery supplying electric power to the motor, is possible and

(ii) a remaining battery level of the battery is greater than or equal to a predetermined reference value,

the prediction component predicts that the fuel efficiency of the vehicle is degraded in the future travel path and the notification component issues a notification prompting an accelerator operation that causes the vehicle to travel by using the motor as the driving power source.

4. The driving assistance apparatus according to claim 1, further comprising:

an inappropriate operation record component configured to record information on an inappropriate operation in a storage medium in cases where the inappropriate operation record component determines that the inappropriate operation, which is an operation causing the fuel efficiency of the vehicle to be degraded, is conducted in run of the vehicle,

wherein;

the information on the inappropriate operation includes content of the inappropriate operation and location where the inappropriate operation is conducted; and

when the prediction component determines, based on the stored information on the inappropriate operation, that the future travel path contains an area where the inappropriate operation was conducted,

the prediction component predicts that the fuel efficiency of the vehicle is degraded in the future travel path and the notification component issues a notification for drawing attention to the inappropriate operation.

5. The driving assistance apparatus according to claim 4, wherein:

the inappropriate operation includes a braking operation that generates a braking force larger than a maximum regenerative braking force produced by regenerative electricity generation of the motor.

6. The driving assistance apparatus according to claim 4, wherein:

the inappropriate operation includes an accelerator operation that causes energy consumption efficiency of the driving power source to be less than a predetermined threshold.

7. The driving assistance apparatus according to claim 4, wherein:

the inappropriate operation includes a wavy driving operation that causes the vehicle to repeat acceleration and deceleration a number of time larger than a prescribed value.

8. The driving assistance apparatus according to claim 4, wherein:

the inappropriate operation includes an accelerator operation that causes efficiency of the driving power source of the vehicle to be less than a predetermined threshold.