Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Reexamination Certificate
2006-04-11
2006-04-11
Williams, Thomas (Department: 3683)
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
C267S140150
Reexamination Certificate
active
07025342
ABSTRACT:
In an actuator drive control device for an active vibration isolation support system, accumulated time of eight time intervals tn of crank pulses which are outputted at every 15 degrees of a crank angle in a vibration period corresponding to 120 degrees of the crank angle, and average accumulated time shown by a straight line connecting a start point and an end point of the line of the accumulated time are calculated. Eight deviations Δtn are calculated by subtracting the average accumulated time from the accumulated time. A variation waveform of the deviations Δtn corresponds to a variation waveform of the time interval tn of the crank pulses attributable only to the engine vibration with the influence of a variation in the engine rotational speed Ne being eliminated. Therefore, the vibration isolation function of an active vibration isolation support system can be effectively executed by controlling an actuator of the active vibration isolation support system based on the engine vibration which is estimated from the variation waveform of the time interval tn. Thus, the active vibration isolation support system is precisely controlled by accurately estimating a vibration state of the engine when the engine rotational speed increases and decreases.
REFERENCES:
patent: 5020491 (1991-06-01), Mashino
patent: 5086741 (1992-02-01), Nakamura et al.
patent: 5291967 (1994-03-01), Aoki
patent: 5332061 (1994-07-01), Majeed et al.
patent: 5385129 (1995-01-01), Eyberg
patent: 6422546 (2002-07-01), Nemoto et al.
patent: 2003/0030203 (2003-02-01), Nemoto
patent: 2003-113892 (2003-04-01), None
Abe Atsushi
Matsuura Takashi
Nemoto Hirotomi
Yoshimura Ken-ichi
Blackman William D.
Carrier Joseph P.
Carrier Blackman & Associates P.C.
Honda Motor Co. Ltd.
Keihin Corporation
LandOfFree
Actuator drive control device for active vibration isolation... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Actuator drive control device for active vibration isolation..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Actuator drive control device for active vibration isolation... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3610073