VARIABLE DAMPING FORCE SHOCK ABSORBER CONTROL DEVICE

Title:

VARIABLE DAMPING FORCE SHOCK ABSORBER CONTROL DEVICE

Document Type and Number:

Japanese Patent JP3161144

Kind Code:

B

Abstract:

PURPOSE: To provide a variable damping force shock absorber control device capable of obtaining an estimated absolute velocity value DXp of spring of high reliability.
CONSTITUTION: A relative positional signal Y after filtration is integrated (process F102), Y/S is multiplied by a gain (-k/M) (process F103) and Y is differentiated to obtain relative velocity DY of spring-unspring (process F104). Furthermore, a damping force c.DYp is estimated on the basis of DY and the current step position ST of a stepping motor (process F105), the value of c.DYp is integrated (process F106) and the value of c.Yp is multiplied by a gain (-1/M) (process F107). Also, (-k.Y/S.M) is added to (-c.Yp/M) to obtain an estimated absolute velocity value DXp of spring (process F108) and a target value V is obtained on the basis of DXp and DY (process F109). An actuator is driven on the basis of the target value V, and the damping force of a variable damping force shock absorber is thereby adjusted. In the above, S stands for a Laplace operator, (k) for a spring constant and M for spring weight.

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Inventors:

Nakayama, Tadaki
Tokuda, Hiromi
Takeda, Masayoshi
Ishikawa, Hiroshi
Watanabe, Koji

Application Number:

JP1993000078010

Publication Date:

February 23, 2001

Filing Date:

April 05, 1993

Export Citation:

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Assignee:

NIPPONDENSO CO LTD

International Classes:

B60G13/00; B60G17/015; B60G13/00; B60G17/015; (IPC1-7): B60G17/015

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