Vehicle control system

• US 8,775,040 B2
• Filed: 08/17/2010
• Issued: 07/08/2014
• 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, Koibuchi, Ken, Takeuchi, Keisuke, Tanahashi, Toshio, Hanamura, Hiroyuki, Takanami, Yoji, Asahara, Norimi, Itabashi, Kaiji
• Primary Examiner(s): Nguyen, Cuong H
• Application Number:
  US13/389,829
• Publication Number:
  US 20120143399A1
• Time in Patent Office: 1,421 Days
• Field of Search: 701/55, 701/57, 701/68, 701/73, 701/74, 701/37, 136/256, 303148-151
• US Class Current: 701/55
• CPC Class Codes: B60W 2050/0055 High-pass filters
• CPC Class Codes: B60W 2050/0056 Low-pass filters
• CPC Class Codes: B60W 2050/0059 Signal noise suppression
• 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 2720/106 Longitudinal acceleration
• CPC Class Codes: B60W 2720/125 Lateral acceleration
• CPC Class Codes: B60W 30/02 Control of vehicle driving stability
• CPC Class Codes: B60W 40/10 related to vehicle motion

Abstract

A vehicle control system obtains an index indicating a running condition of a vehicle on the basis of a vehicle parameter indicating a motion of the vehicle and then sets a running characteristic of the vehicle in accordance with the index. The vehicle control system includes a noise reduction unit that is configured to obtain the index on the basis of the vehicle parameter of which a fluctuating component that fluctuates because of a driver'"'"'s driving operation or the influence of a running road surface.

Claims

1. A vehicle control system that obtains an index indicating a running condition of a vehicle on the basis of a vehicle parameter indicating a motion of the vehicle and then sets a running characteristic of the vehicle in accordance with the index, comprising:

a noise reduction unit that is configured to obtain the index on the basis of the vehicle parameter of which a fluctuating component that fluctuates due to a condition of a running road surface is attenuated,

wherein the noise reduction unit is configured to attenuate a noise component of a predetermined frequency that falls within a predetermined frequency band of the fluctuating component by filtering the fluctuating component using a band-pass filter having a predetermined frequency characteristic, in order to suppress an influence of a noise of the fluctuating component on a resultant index.

2. The vehicle control system according to claim 1, wherein

the vehicle parameter includes an acceleration of the vehicle.

3. The vehicle control system according to claim 1, wherein

the noise reduction unit is configured to attenuate a noise component of a predetermined frequency in the fluctuating component.

4. The vehicle control system according to claim 1, wherein

the filter used in the noise reduction unit is the same filter as that used in a unit other than the noise reduction unit.

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

the filter used in the noise reduction unit is different from a filter used in a unit other than the noise reduction unit.

6. The vehicle control system according to claim 1, wherein

in the filter used in the noise reduction unit, a filter characteristic for a component in a longitudinal direction of the vehicle is different from a filter characteristic for a component in a lateral direction of the vehicle.

7. The vehicle control system according to claim 1, wherein

the filter used in the noise reduction unit has a filter characteristic that is varied in accordance with a speed range of the vehicle.

8. The vehicle control system according to claim 2, wherein

the noise reduction unit is configured to attenuate a noise component of a predetermined frequency in the fluctuating component.