Method for controlling variable damper in vehicle

Details Method for controlling variable damper in vehicle Method for controlling variable damper in vehicle

2008-07-29

2008-07-29

Keith, Jack W (Department: 3663)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle subsystem or accessory control

C280S005504

Reexamination Certificate

active

11283992

ABSTRACT:
The present invention relates to a method of controlling a variable damper in a vehicle wherein a rear-wheel variable damper can be controlled by estimating a vertical acceleration value of a rear wheel based on the fact that there is a certain time delay in a wheel motion between front and rear wheels due to the wheelbase and vehicle speed. To this end, the method of the present invention comprises the steps of (a) detecting vehicle body accelerations other than a desired vehicle body acceleration of a vehicle body; (b) calculating the desired vehicle body acceleration based on the other detected vehicle body accelerations according to a geometric rule; (c) calculating vehicle body vertical velocities by filtering the vehicle body accelerations to eliminate DC offsets therefrom and integrating the filtered accelerations; (d) detecting accelerations of front right/left vehicle wheels; (e) calculating front wheel vertical velocities by filtering the detected accelerations of the front right/left wheels to eliminate DC offsets therefrom and integrating the filtered accelerations, and then calculating accelerations of rear wheels by time delaying the accelerations of the front wheels by a time interval taken while a road input to the front wheel is delivered to the rear wheel at a vehicle speed; and (f) calculating damper velocities based on the calculated vehicle body vertical velocities and the calculated vehicle wheel vertical velocities. Accordingly, the Sky-hook determination can be more accurately made. Further, since it is not necessary to use all the four sensors, the number of parts of vehicles can be reduced when mass-producing the vehicles. Consequently, the selling prices for finished vehicles can be lowered, and thus, an unnecessary economical burden cannot be imposed on the consumers.

REFERENCES:
patent: 4756549 (1988-07-01), Kurosawa et al.
patent: 4838547 (1989-06-01), Sterling
patent: 4949262 (1990-08-01), Buma et al.
patent: 5085458 (1992-02-01), Kii et al.
patent: 5193845 (1993-03-01), Yokote et al.
patent: 5199737 (1993-04-01), Huang
patent: 5410482 (1995-04-01), Kimura et al.
patent: 5488556 (1996-01-01), Sasaki
patent: 5510988 (1996-04-01), Majeed et al.
patent: 5802478 (1998-09-01), Iwasaki
patent: 5808890 (1998-09-01), Sasaki
patent: 5832398 (1998-11-01), Sasaki et al.
patent: 5950776 (1999-09-01), Iwasaki et al.
patent: 6366841 (2002-04-01), Ohsaku

Affiliated with

Also associated with

Rating

Method for controlling variable damper in vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for controlling variable damper in vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling variable damper in vehicle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3927635