VEHICLE CONTROL DEVICE

• US 20130226405A1
• Filed: 11/15/2010
• Published: 08/29/2013
• Est. Priority Date: 11/15/2010
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Koumura, Shingo, Yoshimi, Tsuyoshi
• Application Number:
  US13/883,482
• Publication Number:
  US 20130226405A1
• Time in Patent Office: Days
• US Class Current: 701/38
• CPC Class Codes: B60G 17/016 characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input B60G17/017 takes precedence
• CPC Class Codes: B60G 17/0161 mainly during straight-line motion B60G17/0164 takes precedence
• CPC Class Codes: B60G 17/0165 to an external condition, e.g. rough road surface, side wind
• CPC Class Codes: B60G 17/018 characterised by the use of a specific signal treatment or control method
• CPC Class Codes: B60G 17/08 Characteristics of fluid dampers adjusting fluid dampers in general F16F9/44 - F16F9/53
• CPC Class Codes: B60G 21/0553 adjustable
• CPC Class Codes: B60G 2202/322 the damper being controllable
• CPC Class Codes: B60G 2202/422 Linear motor
• CPC Class Codes: B60G 2204/81 front and rear unit
• CPC Class Codes: B60G 2400/0521 Roll rate
• CPC Class Codes: B60G 2400/0522 Pitch rate
• CPC Class Codes: B60G 2400/204 Vehicle speed
• CPC Class Codes: B60G 2400/252 vertical
• CPC Class Codes: B60G 2400/821 Uneven, rough road sensing affecting vehicle body vibration
• CPC Class Codes: B60G 2500/10 Damping action or damper
• CPC Class Codes: B60G 2600/184 Semi-Active control means
• CPC Class Codes: B60G 2600/1877 Adaptive Control
• CPC Class Codes: B60G 2600/70 Computer memory; Data storage, e.g. maps for adaptive control
• CPC Class Codes: B60G 2800/162 Reducing road induced vibrations

Abstract

A vehicle control device acquires a roll changing amount generated in a vehicle, acquires a pitch changing amount generated in the vehicle, synthesizes the roll changing amount and the pitch changing amount to acquire a synthesized value, and controls a front/rear wheel damping force distribution based on the synthesized value. The vehicle control device includes a roll damping force varying unit that detects a vehicle speed, detects a road surface in-phase/reverse-phase ratio, and controls a roll damping force by a variable roll damping control amount, where the front/rear wheel damping force distribution is determined from a front/rear wheel damping force distribution map based on the vehicle speed, the road surface in-phase/reverse-phase ratio, and the roll damping control amount.

Claims

1. A vehicle control device comprising:

a roll acquiring unit configured to acquire a roll changing amount generated in a vehicle;

a pitch acquiring unit configured to acquire a pitch changing amount generated in the vehicle;

a synthesizing unit configured to synthesize the roll changing amount and the pitch changing amount to acquire a synthesized value; and

a front/rear wheel damping force distributing unit configured to control a front/rear wheel damping force distribution based on the synthesized value acquired by the synthesizing unit.

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

the front/rear wheel damping force distributing unit controls the front/rear wheel damping force distribution such that the synthesized value becomes a minimum.

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

the roll acquiring unit or the pitch acquiring unit acquires a roll angular speed, which is the roll changing amount, or a pitch angular speed, which is the pitch changing amount, based on at least one of a vehicle speed, a road surface in-phase/reverse-phase ratio and a roll damping control amount.

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

the synthesizing unit calculates the synthesized value with a weighting of the roll changing amount made large with respect to the pitch changing amount.

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

the synthesizing unit calculates the synthesized value with a weighting of the roll changing amount made large with respect to the pitch changing amount.

5. A vehicle control device comprising:

a vehicle speed detecting unit configured to detect a vehicle speed;

an in-phase/reverse-phase ratio detecting unit configured to detect a road surface in-phase/reverse-phase ratio; and

a roll damping force varying unit configured to control a roll damping force by a variable roll damping control amount, wherein

a front/rear wheel damping force distribution is determined from a front/rear wheel damping force distribution map based on the vehicle speed, the road surface in-phase/reverse-phase ratio and the roll damping control amount.