Vibration control apparatus for automotive vehicle

• US 20050049761A1
• Filed: 11/10/2003
• Published: 03/03/2005
• Est. Priority Date: 11/19/2002
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Sawada, Mamoru, Matsumoto, Toshiki, Tashiro, Tsutomu, Kataoka, Motoaki, Mabuchi, Mamoru
• Granted Patent: US 8,489,300 B2
• Time in Patent Office: Days
• US Class Current: 701/1
• 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 17/0165 to an external condition, e.g. rough road surface, side wind
• CPC Class Codes: B60G 17/0195 characterised by the regulation being combined with other vehicle control systems conjoint control of vehicle sub-units including control of suspension systems B60W10/22
• CPC Class Codes: B60G 2400/102 vertical
• CPC Class Codes: B60G 2400/206 Body oscillation speed; Body vibration frequency
• CPC Class Codes: B60G 2400/208 of wheel rotation
• CPC Class Codes: B60G 2400/30 Propulsion unit conditions
• CPC Class Codes: B60G 2400/61 Load distribution
• CPC Class Codes: B60G 2400/63 Location of the center of gravity
• CPC Class Codes: B60G 2400/64 Wheel forces, e.g. on hub, spindle or bearing
• CPC Class Codes: B60G 2800/162 Reducing road induced vibrations
• CPC Class Codes: B60G 2800/18 Starting, accelerating
• CPC Class Codes: B60G 2800/22 Braking, stopping
• CPC Class Codes: B60G 2800/24 Steering, cornering
• CPC Class Codes: B60G 2800/916 Body Vibration Control
• CPC Class Codes: B60T 13/662 characterised by specified functions of the control system components
• CPC Class Codes: B60T 2270/86 Optimizing braking by using ESP vehicle or tire model
• 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 10/18 including control of braking systems
• CPC Class Codes: B60W 2050/0031 : Mathematical model of the vehicle
• CPC Class Codes: B60W 30/1819 : Propulsion control with control means using analogue circuits, relays or mechanical links
• CPC Class Codes: B60W 30/20 : Reducing vibrations in the driveline
• CPC Class Codes: F16F 15/02 : Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems F16F15/005 takes precedence ; layered products B32B; suppression of vibration in ships B63; relieving load on bearings, using magnetic means F16C39/06
• CPC Class Codes: Y02T 10/40 : Engine management systems

Abstract

An object of the present invention is to execute an optimum control of vibrations due to a driver'"'"'s operation of an accelerator pedal, steering wheel and brake pedal. The operation instructions are inputted into a vibration calculating means (kinetic model) comprising a vehicle body model, suspension model and tire model. Conventional kinetic model controlled the suspension in order to suppress the vehicle body vibration. However, in the kinetic model of the present invention, the tire vibration due to a change in the engine output is first absorbed by the suspension, whereby a residual vibration which was not be absorbed yet by the suspension is transferred to the vehicle body. The operation inputs are compensated by the three feed-back loops between the outputs of the above-mentioned three portions and input of the tire portion, giving the highest priority on the vehicle body model.

Claims

1. A vehicle vibration control apparatus for controlling an engine and/or brake in response to an input indicative of at least one of the driver'"'"'s operations of an accelerator, steering and brake, comprising:

vibration calculating means for calculating a tire vibration due to a road surface reaction force, under-spring vibration of a suspension and on-spring vibration of a vehicle body; and

compensating means for compensating said input in order to reduce the vibrations.

2. The vehicle vibration control apparatus according to claim 1, wherein:

said vibration calculating means comprises;

a tire model for calculating a tire vibration due to a road surface reaction force,

a suspension model for calculating an under-spring vibration of a suspension, and

a vehicle body model for calculating an on-spring vibration of a vehicle body; and

said compensating means compensates said input in order to reduce the vibrations, giving priority to said vehicle body model.

3. The vehicle vibration control apparatus according to claim 1, wherein:

said input includes an external factor outside said vehicle; and

said compensating means compensates said input in order to reduce a vibration caused by said external factor.

4. The vehicle vibration control apparatus according to claim 2, wherein said input is inputted into said tire model which is connected with an input of said suspension model which is connected with said vehicle body model.

5. The vehicle vibration control means according to claim 1, wherein:

said input includes an external factor outside said vehicle; and

said compensating means compensates said input in order to reduce vibrations caused by said external factor and said at least one of driver'"'"'s operations.

6. The vehicle vibration control means according to claim 1, wherein said compensating means compensates said input in order to reduce a displacement of the center of gravity of said vehicle body.

7. The vehicle vibration control means according to claim 1, wherein said compensating means compensates said input in order to reduce a displacement of a head position of a passenger.