CONTROL DEVICE FOR VEHICLE

• US 20120179342A1
• Filed: 08/17/2010
• Published: 07/12/2012
• Est. Priority Date: 08/18/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Noumura, Shin, Itabashi, Kaiji, Koibuchi, Ken, Tanahashi, Toshio, Takeuchi, Keisuke, Hanamura, Hiroyuki, Takanami, Yoji, Asahara, Norimi
• Granted Patent: US 9,067,604 B2
• Time in Patent Office: Days
• US Class Current: 701/54
• CPC Class Codes: B60K 6/36 characterised by the transmission gearings
• CPC Class Codes: B60W 10/04 including control of propulsion units
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 10/18 including control of braking systems
• CPC Class Codes: B60W 10/22 including control of suspension systems
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2520/105 Longitudinal acceleration
• CPC Class Codes: B60W 2520/125 Lateral acceleration
• CPC Class Codes: B60W 30/188 Controlling power parameters of the driveline, e.g. determining the required power
• CPC Class Codes: B60W 40/09 Driving style or behaviour
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: B60W 50/10 Interpretation of driver requests or demands

Abstract

In a control device for a vehicle that controls a revolution speed of a drive power source or a gear ratio of a transmission coupled to an output side of the drive power source in the vehicle equipped with the drive power source and the transmission, the control device is configured to determine an index that is based on a running state of the vehicle, and to control a required revolution speed of the drive power source or a required gear ratio for the transmission on the basis of the index.

Claims

1. A control device for a vehicle that controls a revolution speed of a drive power source or a gear ratio of a transmission coupled to an output side of the drive power source in the vehicle equipped with the drive power source and the transmission, the control device being configured to:

determine an index that is based on a running state of the vehicle, which is in accordance with driver'"'"'s intention; and

control a required revolution speed of the drive power source or a required gear ratio for the transmission on the basis of the index.

2. The control device according to claim 1, wherein the required revolution speed or the required gear ratio is established in advance according to a speed of the vehicle and the index.

3. The control device according to claim 1, wherein the index is determined on the basis of at least one of a longitudinal acceleration and a lateral acceleration of the vehicle.

4. The control device according to claim 1, wherein

a required maximum acceleration ratio that is established in advance according to the index is determined on the basis of the index, and a required acceleration for each vehicle speed is determined on the basis of a maximum generated acceleration and the required maximum acceleration ratio for each vehicle speed, and

the required revolution speed or the required gear ratio is set on the basis of the required acceleration,

5. The control device according to claim 1 wherein

a required maximum acceleration ratio that is established in advance according to the index is determined on the basis of the index, and a required acceleration is determined on the basis of a maximum generated acceleration and the required maximum acceleration ratio at a point in time at which the index is determined, and

the required revolution speed or the required gear ratio is maintained at a value at which this required acceleration is attained.

6. The control device according to claim 1, Wherein

a required maximum acceleration ratio that is established in advance according to the index is determined on the basis of the index, and

when the index is larger than a predetermined value, a required acceleration is determined on the basis of a maximum generated acceleration and the required maximum acceleration ratio at a point in time at which the index is determined, and the required revolution speed or the required gear ratio is maintained at a value at which this required acceleration is attained.

7. The control device according to claim 1, wherein a driving requirement amount for the vehicle is determined, and a target revolution speed of the drive power source or a target gear ratio of the transmission is further determined on the basis of the driving requirement amount, and the drive power source is controlled to have either the required revolution speed or the target revolution speed whichever is higher, or the transmission is controlled to have either the required gear ratio or the target gear ratio whichever is higher.

8. The control device according to claim 7, wherein a variation rate of the revolution speed of the drive power source in a case in which the target revolution speed exceeds the required revolution speed, or a variation rate of the gear ratio in a case in which the target gear ratio exceeds the required gear ratio is made different depending on the index.

9. The control device according to claim 8, wherein when the index based on the running state of the vehicle is relatively large, the variation rate of the revolution speed or the variation rate of the gear ratio is higher than when the index is relatively small.

10. The control device according to claim 1, wherein when the vehicle turns, a variation of the required revolution speed or the required gear ratio is suppressed compared with a case in which the vehicle does not turn.

11. A control method for a vehicle for controlling a revolution speed of a drive power source or a gear ratio of a transmission coupled to an output side of the drive power source in the vehicle equipped with the drive power source and the transmission, the control method comprising:

determining an index that is based on a running state of the vehicle; and

controlling a required revolution speed of the drive power source or a required gear ratio for the transmission on the basis of the index.