Patent CA638651A successfully refreshed from Google Patents.
Patent EP0221486A2 successfully refreshed from Google Patents.
EP0221486A2
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Shock absorber controller
Assignee: Toyota Motor Corp
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Filing: 1986-10-27
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Granted: —
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Expires: 2006-10-27
Abstract
Abstract This controller (M3) controls a variable damping force shock absorber (M2) taking the cycle time and the oscillating phase of the body vibration. The controller increases the damping force when the body is moving toward its mean position. Before that, the damping force is kept weak so that the body vibration is hastened to become moving toward the mean position. Some criteria for determining that the body is moving toward its mean position are proposed.
Inventors
- 👤 Ryuichi Kurosawa
- 👤 Hirohide Iwase
- 👤 Yukio Yamamoto
- 👤 Ryushi Tanaka
- 👤 Takashi Shirasu
- 👤 Susumu Oda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 11:00
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/06; B60G17/08; B60G17/015; B60G17/016; B60G17/0165; B60G17/018; B60G2400/00; B60G2400/80; B60G2400/82; B60G2400/821; B60G2500/00; B60G2500/30; B60G2600/00; B60G2600/02; B60G2800/00; B60G2800/16; B60G2800/162; Y; Y10; Y10S; Y10S280/00; Y10S280/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
A shock absorber controller for a vehicle suspension comprising: vertical movement detection means for detecting a vertical movement of a body of the vehicle; control means for generating a damping force alteration signal at a time point when the vehicle body is moving toward a mean position of the body; and damping force alteration means responsive to the damping force alteration signal for increasing a damping force of the shock absorber.
Claim 2
Dependent Claim
71 words
A shock absorber controller for a vehicle suspension comprising: vertical movement detection means for detecting a vertical movement of a body of the vehicle; control means for generating a damping force alteration signal at a time point when the vehicle body is moving toward a mean position of the body; and damping force alteration means responsive to the damping force alteration signal for increasing a damping force of the shock absorber.
Claim 3
Dependent Claim
73 words
A shock absorber controller for a vehicle suspension according to claim 1, wherein: the vertical movement detection means comprise a body height detection means for generating a body height signal; and the control means generate the damping force alteration signal at a time point within a period in which the body height signal change is going toward a mean body height, the mean body height corresponding to the mean position of the body.
Claim 4
Dependent Claim
61 words
A shock absorber controller for a vehicle suspension according to claim 2, wherein the time point is set at a predetermined period after when the body height signal exceeds a first predetermined range including the mean body height, the period being determined to be no greater than a semi-cycle period of the resonant vibration of the sprung mass of the vehicle.
Claim 5
Dependent Claim
60 words
A shock absorber controller for a vehicle suspension according to claim 2, wherein the time point is set at a predetermined period after the body height signal attains the first local maximum or the first local minimum since the body height signal exceeds the first predetermined range but before the body height signal is equal to the mean body height.
Claim 6
Dependent Claim
47 words
A shock absorber controller for a vehicle suspension according to claim 4, wherein the body height is determined to have attained the first local maximum or the first local minimum when a difference of sequent two detected body height signals is less than a predetermined small value.
Claim 7
Dependent Claim
61 words
A shock absorber controller for a vehicle suspension according to claim 1, wherein: the vertical movement detection means comprise an acceleration detection means for detecting a vertical acceleration of the body and for generating an acceleration signal; and the control means generate the damping force alteration signal at a predetermined period after the acceleration signal exceeds a predetermined range including zero.
Claim 8
Dependent Claim
48 words
A shock absorber controller for a vehicle suspension according to claim 6, wherein: the control means generate the damping force alteration signal at another predetermined period after the acceleration signal attains the first local maximum or the first local minimum after the acceleration signal exceeds the predetermined range.
Claim 9
Dependent Claim
46 words
A shock absorber controller for a vehicle suspension according to claim 7, wherein the acceleration signal is determined to have attained the first local maximum or the first local minimum when a difference of sequent two detected acceleration signals is less than a predetermined small value.
Claim 10
Dependent Claim
82 words
A shock absorber controller for a vehicle suspension according to claim 1, wherein: the vertical movement detection means comprise a body height detection means for generating a body height signal; and the control means generate the damping force alteration signal at a predetermined period after the body height signal attains a local maximum or a local minimum but before the body height signal is equal to a mean body height, the mean body height corresponding to the mean position of the body.
Claim 11
Dependent Claim
59 words
A shock absorber controller for a vehicle suspension according to claim 9, wherein the control means generate the damping force alteration signal at the predetermined period after the body height signal attains the local maximum or the local minimum if the body height signal change is going toward the mean value of the body height during the predetermined period.
Claim 12
Dependent Claim
48 words
A shock absorber controller for a vehicle suspension according to claim 9 or claim 10, wherein the body height is determined to have attained the local maximum or the local minimum when a difference of sequent two detected body height signals is less than a predetermined small value.
References Cited (Backward Citations)
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