IP Library Granted Patent US 11,712,940
Granted Patent B2
US 11,712,940 · App. 16/782,724 · Granted Aug 1, 2023

Suspension device and recording medium

Inventor: Yosuke Murakami (Fukuroi, JP)
Assignee: HITACHI ASTEMO, LTD.
B60G17/08F16F9/48F16F9/512F16F9/516B60G2202/24B60G2300/12B60G2400/10B60G2400/25B60G2500/114B60G2600/70B60G2800/91
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Quick Facts
Patent No.
US 11,712,940
App. No.
16/782,724
Granted
Aug 1, 2023
Kind
B2
Abstract

A suspension device includes: a suspension including a damping device which damps a force generated between a vehicle body and a wheel; and a damping force control unit that increases a damping force of the damping device so as to be greater than the damping force generated when an acceleration of change in a stroke amount is less than a predetermined value determined in advance, when the acceleration of the change in the stroke amount is equal to or greater than the predetermined value, in which the stroke amount is an amount of displacement from a reference position of the wheel with respect to the vehicle body in an extension direction of the suspension.

Claims (23)

1. A suspension device comprising:

a suspension including a damping device which damps a force generated between a vehicle body and a wheel of a motorcycle;

a damping force control unit that increases a damping force of the damping device such that the damping force generated when an acceleration of a change in a stroke amount is equal to or greater than a predetermined value determined in advance becomes greater than the damping force generated when the acceleration of the change in the stroke amount is less than the predetermined value, the stroke amount being an amount of displacement from a reference position of the wheel with respect to the vehicle body in an extension direction of the suspension; and

a predetermined value setting unit that sets the predetermined value such that the predetermined value is decreased as the stroke amount is decreased, wherein

the damping force is increased in such a manner that the suspension does not go into the most extended state.

2. The suspension device according to claim 1 , wherein

the damping force control unit increases the damping force as the acceleration is increased.

3. A suspension device comprising:

a suspension including a damping device which damps force generated between a vehicle body and a wheel of a motorcycle;

a first control unit that controls a damping force of the damping device using a speed of change in a stroke amount, the stroke amount being an amount of displacement from a reference position of the wheel with respect to the vehicle body in an extension direction of the suspension;

a determination unit that determines whether the suspension goes into the most extended state under a first damping force controlled by the first control unit; and

a second control unit that controls the damping force so as to be greater than the first damping force when the determination unit determines that the suspension goes into the most extended state, wherein

the damping force is increased by the second control unit in such a manner that the suspension does not go into the most extended state.

4. The suspension device according to claim 3 , wherein

when the acceleration of the change in the stroke amount is equal to or greater than a predetermined value determined in advance, the determination unit determines whether the suspension goes into the most extended state.

5. The suspension device according to claim 4 , further comprising:

a predetermined value setting unit that sets the predetermined value such that the predetermined value is decreased as the stroke amount is decreased.

6. The suspension device according to claim 3 , wherein

the second control unit increases the damping force as the acceleration of the change in the stroke amount is increased.

7. The suspension device according to claim 4 , wherein

the second control unit increases the damping force as the acceleration of the change in the stroke amount is increased.

8. The suspension device according to claim 5 , wherein

the second control unit increases the damping force as the acceleration of the change in the stroke amount is increased.

Assignments (2)
MERGER AND CHANGE OF NAME Recorded Nov 23, 2021
From: SHOWA CORPORATION; HITACHI ASTEMO, LTD.
To: HITACHI ASTEMO, LTD.
Reel/Frame 058195/0590 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 5, 2020
From: MURAKAMI, YOSUKE
To: SHOWA CORPORATION
Reel/Frame 051729/0612 →
Priority Claims (1)
JP 2017-202899 · Oct 19, 2017 · national
Continuity (2)
Continuation PCTJP2017039373 · Oct 31, 2017
Related Publication 20200171909A1 · Jun 4, 2020
Cited By (1)
US 12,311,717