Vehicular Acceleration Suppression Device and Vehicular Acceleration Suppression Method

• US 20150284000A1
• Filed: 11/22/2013
• Published: 10/08/2015
• Est. Priority Date: 11/27/2012
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Hayakawa, Yasuhisa, Sugano, Takeshi, Gokan, Toshimichi, Fukata, Osamu, Tanaka, Daisuke, Inoue, Takuya
• Granted Patent: US 9,457,806 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60K 2031/0091 Speed limiters or speed cutters
• CPC Class Codes: B60K 28/00 Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions for electrically-propelled vehicles B60L3/00; road vehicle drive control systems for purposes not related to the control of a particular sub-unit B60W30/00; drive control systems specially adapted for autonomous road vehicles B60W60/00
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration
• CPC Class Codes: B60W 30/06 Automatic manoeuvring for parking
• CPC Class Codes: B60W 30/08 Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
• CPC Class Codes: B60W 30/146 Speed limiting
• CPC Class Codes: B60W 30/18009 related to particular drive situations
• CPC Class Codes: B60W 30/188 Controlling power parameters of the driveline, e.g. determining the required power
• CPC Class Codes: B60W 40/06 Road conditions
• CPC Class Codes: B60W 40/107 Longitudinal acceleration
• CPC Class Codes: B60W 50/12 Limiting control by the driver depending on vehicle state, e.g. interlocking means for the control input for preventing unsafe operation
• CPC Class Codes: G05D 13/62 characterised by the use of electric means, e.g. use of a tachometric dynamo, use of a transducer converting an electric value into a displacement electric motor control H02P
• CPC Class Codes: G08G 1/167 Driving aids for lane monitoring, lane changing, e.g. blind spot detection

Abstract

Based on a parking frame certainty degree indicative of a degree of certainty about a presence is a parking frame in the travel direction of the vehicle and a parking frame entering certainty degree indicative of a degree of certainty about whether the vehicle enters the parking frame, a total certainty degree indicative of a total degree of the certainty of the parking frame certainty degree and the parking frame entering certainty degree is calculated. Acceleration of the vehicle is controlled depending on a manipulation amount of an accelerator pedal manipulated by a drive to instruct a driving force and is suppressed in a higher suppression degree as the total certainty degree is higher. Furthermore, the acceleration of the vehicle is suppressed in a lower suppression degree as the vehicle speed of the vehicle is higher.

Claims

1. A vehicular acceleration suppression device for suppressing acceleration of a vehicle which depends on a manipulation amount of a drive force instruction manipulation element manipulated by a driver to instruct a drive force to control suppression of the drive force, the vehicular acceleration suppression device comprising:

a drive force manipulation amount detection unit configured to detect a drive force manipulation amount which is the manipulation amount of the drive force instruction manipulation element;

an acceleration control unit configured to control the acceleration of the vehicle depending on the drive force manipulation amount detected by the drive force manipulation amount detection unit;

a surrounding environment recognition unit configured to recognize an environment surrounding the vehicle based on detection information of a surrounding environment recognition sensor provided on the vehicle;

a vehicle speed detection unit configured to detect a vehicle speed of the vehicle;

a parking frame certainty degree calculation unit configured to calculate a parking frame certainty degree indicative of a degree of certainty about a presence of a parking frame in a travel direction of the vehicle based on the environment recognized by the surrounding environment recognition unit; and

an acceleration suppression unit configured to suppress the acceleration controlled by the acceleration control unit based on the parking frame certainty degree calculated by the parking frame certainty degree calculation unit and the vehicle speed detected by the vehicle speed detection unit, wherein

the acceleration suppression unit is configured to set a suppression degree of the acceleration to be lower as the vehicle speed detected by the vehicle speed detection unit is higher.

2. The vehicular acceleration suppression device according to claim 1, further comprising:

a vehicle travel state detection unit configured to detect a travel state of the vehicle;

a parking frame entering certainty degree calculation unit configured to calculate a parking frame entering certainty degree indicative of a degree of certainty about whether the vehicle enters the parking frame based on the environment recognized by the surrounding environment recognition unit and the travel state detected by the vehicle travel state detection unit; and

a total certainty degree calculation unit configured to calculate a total certainty degree indicative of a total degree of the certainty of the parking frame certainty degree and the parking frame entering certainty degree based on the parking frame certainty degree calculated by the parking frame certainty degree calculation unit and the parking frame entering certainty degree calculated by the parking frame entering certainty degree calculation unit, wherein

the acceleration suppression unit is configured to set the suppression degree of the acceleration to be lower when the total certainty degree calculated by the total certainty degree calculation unit is lower than when the total certainty degree is higher.

3. The vehicular acceleration suppression device according to claim 1, further comprising:

a vehicle current position detection unit configured to detect a current position of the vehicle; and

a vehicle travel road type detection unit configured to detect a road type of a road on which the vehicle travels, wherein

the parking frame certainty degree calculation unit is configured to calculate the parking frame certainty degree by using the current position detected by the vehicle current position detection unit and the road type detected by the vehicle travel road type detection unit.

4. The vehicular acceleration suppression device according to claim 1, wherein the acceleration suppression unit is configured to decrease the suppression degree of the acceleration by delaying an acceleration suppression control start timing which is a start timing of the suppression of the acceleration controlled by the acceleration control unit.

5. The vehicular acceleration suppression device according to claim 1, wherein the acceleration suppression unit is configured to decrease the suppression degree of the acceleration by decreasing an acceleration suppression control amount which is a control amount for suppressing the acceleration controlled by the acceleration control unit.

6. A vehicular acceleration suppression method for suppressing acceleration of a vehicle which depends on a manipulation amount of a drive force instruction manipulation element manipulated by a driver to instruct a drive force to control suppression of the drive force, the vehicular acceleration suppression method comprising:

detecting a drive force manipulation amount which is the manipulation amount of the drive force instruction manipulation element, and a vehicle speed of the vehicle;

recognizing an environment surrounding the vehicle;

calculating a parking frame certainty degree indicative of a degree of certainty about a presence of a parking frame in a travel direction of the vehicle based on the environment which has been recognized; and

suppressing the acceleration of the vehicle, which is controlled depending on the drive force manipulation amount which has been detected, in a lower suppression degree as the vehicle speed which has been detected is higher.

7. The vehicular acceleration suppression method according to claim 6, further comprising:

detecting a travel state of the vehicle;

calculating a parking frame entering certainty degree indicative of a degree of certainty about whether the vehicle enters the parking frame based on the environment which has been recognized and the travel state which has been detected;

calculating a total certainty degree indicative of a total degree of the certainty of the parking frame certainty degree and the parking frame entering certainty degree based on the parking frame certainty degree and the parking frame entering certainty degree which has been calculated, wherein

the acceleration is suppressed in a lower suppression degree when the total certainty degree which has been calculated is lower than when the total certainty degree is higher.