Vehicle control device and method for idle stop control for the same

• US 8,402,936 B2
• Filed: 09/21/2010
• Issued: 03/26/2013
• Est. Priority Date: 11/04/2009
• Status: Expired due to Fees

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Nakamura, Kazuo
• Primary Examiner(s): Cronin, Stephen K
• Assistant Examiner(s): DALLO, JOSEPH J
• Application Number:
  US12/924,104
• Publication Number:
  US 20110005486A1
• Time in Patent Office: 917 Days
• Field of Search: 123/179.4, 123/322, 123/325, 123/347, 701/112, 701/33.4, 701/412
• US Class Current: 123/179.4
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2520/105 Longitudinal acceleration
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/12 Brake pedal position
• 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 50/0097 Predicting future conditions
• CPC Class Codes: F02N 11/0837 Environmental conditions thereof, e.g. traffic, weather or road conditions
• CPC Class Codes: F02N 2200/0801 Vehicle speed
• CPC Class Codes: F02N 2200/101 Accelerator pedal position
• CPC Class Codes: F02N 2200/102 Brake pedal position
• CPC Class Codes: F02N 2200/123 Information about vehicle position, e.g. from navigation systems or GPS signals
• CPC Class Codes: F02N 2200/124 Information about road conditions, e.g. road inclination or surface
• CPC Class Codes: F02N 2200/125 Information about other vehicles, traffic lights or traffic congestion
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A vehicle control device for a vehicle system automatically stops an internal combustion engine of a vehicle when a predetermined stop condition is satisfied and automatically starts the automatically stopped internal combustion engine when a predetermined start condition is satisfied. A stop point detection unit detects a stop point, at which the vehicle possibly stops, while the vehicle travels based on map information stored in a map information storage unit. A traveling information control unit stores traveling information, which includes a state of the vehicle stopping at a stop point and a state of the vehicle passing by the stop point, in the traveling information storage unit. A stop determination unit determines whether to stop the internal combustion engine when the vehicle stops at a stop point based on the traveling information of the stop point stored in the traveling information storage unit.

Claims

1. A vehicle control device for a vehicle system configured to automatically stop an internal combustion engine of a vehicle when a predetermined stop condition is satisfied and automatically start the automatically stopped internal combustion engine when a predetermined start condition is satisfied, the vehicle control device comprising:

a stop point detection unit configured to detect a stop point, at which the vehicle has a high probability to stop while the vehicle travels, the stop point being included in map information stored in a map information storage unit;

a traveling information control unit configured to learn and to store traveling information, which includes a state of the vehicle on determination that the vehicle stops at the stop point and on determination that the vehicle passes by the stop point, in a traveling information storage unit; and

a stop determination unit configured to determine whether to stop the internal combustion engine when the vehicle stops at the stop point based on the traveling information of the stop point stored in the traveling information storage unit.

2. The vehicle control device according to claim 1, wherein the traveling information control unit is further configured to store the traveling information in the traveling information storage unit, the traveling information including:

whether the vehicle stops at the stop point or the vehicle passes by the stop point;

a stop time and a stop period when the vehicle stops at the stop point; and

a passing time when the vehicle passes by the stop point.

3. The vehicle control device according to claim 2, wherein

the stop determination unit is further configured:

not to stop the internal combustion engine when the vehicle stops at the stop point, when determining that a stop period for which the vehicle stops at the stop point is less than a predetermined period based on the traveling information stored in the traveling information storage unit; and

to stop the internal combustion engine when the vehicle stops at the stop point, when determining that the stop period for which the vehicle stops at the stop point is greater than or equal to the predetermined period based on the traveling information stored in the traveling information storage unit.

4. The vehicle control device according to claim 2, wherein

the stop determination unit is further configured to stop the internal combustion engine before the vehicle stops at the stop point when:

determining that the stop period for which the vehicle stops at the stop point is greater than or equal to a predetermined period based on the traveling information stored in the traveling information storage unit; and

determining that a probability that the vehicle stops at the stop point is greater than or equal to a predetermined value based on the traveling information stored in the traveling information storage unit.

5. The vehicle control device according to claim 1, wherein

the traveling information control unit is further configured to store the traveling information in the traveling information storage unit, the traveling information including an approach direction in which the vehicle approaches the stop point, and

the stop determination unit is further configured to determine whether to stop the internal combustion engine, when the vehicle stops at the stop point;

based on the approach direction to the stop point and the traveling information stored in the traveling information storage unit, the traveling information corresponding to the approach direction.

10. The vehicle control device according to claim 1, wherein the stop point is at least one of an intersection without a traffic signal and a merging point with a priority road.

11. The vehicle control device according to claim 4, wherein the traveling information control unit is further configured to calculate the probability as a rate of a stop number, by which the vehicle stops at the stop point, to a summation of the stop number and a passing number, by which the vehicle passes by the stop point.

6. A method for an idle stop control of a vehicle control device for a vehicle system configured to automatically stop an internal combustion engine of a vehicle when a predetermined stop condition is satisfied and automatically start the automatically stopped internal combustion engine when a predetermined start condition is satisfied, the method comprising:

detecting a stop point, which is included in map information and at which the vehicle has a high probability to stop, based on the map information, while the vehicle travels;

learning and storing traveling information in a traveling information storage unit which includes a state of the vehicle on determination that the vehicle stops at the stop point;

learning and storing traveling information in the traveling information storage unit which includes the state of the vehicle on determination that the vehicle passes by the stop point; and

determining whether to stop the internal combustion engine, when the vehicle stops at the stop point, based on the traveling information of the stop point.

7. A non-transitory computer readable medium comprising instructions executed by a computer, the instructions including the method according to claim 6.

8. The method according to claim 6, wherein the stop point is at least one of an intersection without a traffic signal and a merging point with a priority road.

9. The method according to claim 6, wherein

the traveling information includes an approach direction in which the vehicle approaches the stop point,

the method further comprising:

determining whether to stop the internal combustion engine, when the vehicle stops at the stop point, based on the approach direction to the stop point and the traveling information stored in the traveling information storage unit, the traveling information corresponding to the approach direction.

12. A vehicle control device for a vehicle system configured to automatically stop an internal combustion engine of a vehicle when a predetermined stop condition is satisfied and automatically start the automatically stopped internal combustion engine when a predetermined start condition is satisfied, the vehicle control device comprising:

a stop point detection unit configured to detect a stop point, at which the vehicle has a high probability to stop, while the vehicle travels, the stop point being included in map information stored in a map information storage unit;

a traveling information control unit configured to learn and to store traveling information, which includes a state of the vehicle on determination that the vehicle stops at the stop point and a state of the vehicle on determination that the vehicle passes by the stop point, in a traveling information storage unit;

a stop determination unit configured to determine whether to stop the internal combustion engine when the vehicle stops at the stop point based on the traveling information of the stop point stored in the traveling information storage unit, wherein

the traveling information control unit is further configured to store the traveling information in the traveling information storage unit, the traveling information including an approach direction in which the vehicle approaches the stop point, and

the stop determination unit is further configured to determine whether to stop the internal combustion engine, when the vehicle stops at the stop point, based on the approach direction to the stop point and the traveling information stored in the traveling information storage unit, the traveling information corresponding to the approach direction.