Suspension system for vehicle
First Claim
1. A suspension system for a vehicle, comprising:
- a stabilizer apparatus which includes;
(a) a stabilizer bar whose opposite ends are connected respectively to an unsprung portion on a left-wheel side of the vehicle and an unsprung portion on a right-wheel side of the vehicle and which generates, on the basis of a twist-reacting force thereof, a stabilizer force by which a distance between a sprung portion and the unsprung portion on the left-wheel side and a distance between a sprung portion and the unsprung portion on the right-wheel side are changed relative to each other; and
(b) an actuator configured to change the stabilizer force by an operation thereof;
a pair of shock absorbers of a hydraulic type each of which is provided between the sprung portion and the unsprung portion on a corresponding one of the left-wheel side and the right-wheel side and each of which generates an absorber force as a damping force with respect to a relative movement of the sprung portion and the unsprung portion on the corresponding one of the left-wheel side and the right-wheel side toward or away from each other, the pair of shock absorbers respectively including damping-coefficient changing mechanisms each configured to change a damping coefficient that is an ability to generate the absorber force and that is a basis of a magnitude of the absorber force to be generated; and
a control device which is configured to control the stabilizer force of the stabilizer apparatus by controlling the operation of the actuator of the stabilizer apparatus and which is configured to control the damping-coefficient changing mechanisms of the pair of shock absorbers,wherein the control device is configured to execute a body-roll damping control in which at least a part of the stabilizer force is controlled to act as a roll damping force having a magnitude in accordance with a roll speed of a body of the vehicle,wherein the control device is configured to change, in the body-roll damping control, a degree of the magnitude of the roll damping force by the stabilizer force and is configured to control, under execution of the body-roll damping control, the damping coefficient of each of the pair of shock absorbers such that a component of the absorber force which is generated by said each of the pair of shock absorbers and which is for damping roll of the body of the vehicle becomes smaller in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is high than in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is low, andwherein the control device is configured such that, in the body-roll damping control, the degree of the magnitude of the roll damping force by the stabilizer force becomes higher in an instance where an intensity of a vibration of an unsprung resonance frequency is high than in an instance where the intensity of the vibration of the unsprung resonance frequency is low.
1 Assignment
0 Petitions
Accused Products
Abstract
A suspension system for a vehicle including: a stabilizer apparatus configured to change a stabilizer force by an operation of an actuator, a pair of hydraulic shock absorbers configured to change damping coefficients thereof, and a control device which is configured to execute a body-roll damping control in which at least a part of the stabilizer force is controlled to act as a roll damping force having a magnitude in accordance with a roll speed of a body of the vehicle, which is configured to change, in the body-roll damping control, a degree of the magnitude of the roll damping force by the stabilizer force, and which is configured to control, under execution of the body-roll damping control, the damping coefficient of each absorber such that a component of the absorber force for damping roll of the vehicle body is controlled in accordance with the degree of the magnitude of the roll damping force by the stabilizer force, namely, such that the component of the absorber force becomes smaller in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is high than in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is low.
21 Citations
28 Claims
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1. A suspension system for a vehicle, comprising:
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a stabilizer apparatus which includes;
(a) a stabilizer bar whose opposite ends are connected respectively to an unsprung portion on a left-wheel side of the vehicle and an unsprung portion on a right-wheel side of the vehicle and which generates, on the basis of a twist-reacting force thereof, a stabilizer force by which a distance between a sprung portion and the unsprung portion on the left-wheel side and a distance between a sprung portion and the unsprung portion on the right-wheel side are changed relative to each other; and
(b) an actuator configured to change the stabilizer force by an operation thereof;a pair of shock absorbers of a hydraulic type each of which is provided between the sprung portion and the unsprung portion on a corresponding one of the left-wheel side and the right-wheel side and each of which generates an absorber force as a damping force with respect to a relative movement of the sprung portion and the unsprung portion on the corresponding one of the left-wheel side and the right-wheel side toward or away from each other, the pair of shock absorbers respectively including damping-coefficient changing mechanisms each configured to change a damping coefficient that is an ability to generate the absorber force and that is a basis of a magnitude of the absorber force to be generated; and a control device which is configured to control the stabilizer force of the stabilizer apparatus by controlling the operation of the actuator of the stabilizer apparatus and which is configured to control the damping-coefficient changing mechanisms of the pair of shock absorbers, wherein the control device is configured to execute a body-roll damping control in which at least a part of the stabilizer force is controlled to act as a roll damping force having a magnitude in accordance with a roll speed of a body of the vehicle, wherein the control device is configured to change, in the body-roll damping control, a degree of the magnitude of the roll damping force by the stabilizer force and is configured to control, under execution of the body-roll damping control, the damping coefficient of each of the pair of shock absorbers such that a component of the absorber force which is generated by said each of the pair of shock absorbers and which is for damping roll of the body of the vehicle becomes smaller in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is high than in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is low, and wherein the control device is configured such that, in the body-roll damping control, the degree of the magnitude of the roll damping force by the stabilizer force becomes higher in an instance where an intensity of a vibration of an unsprung resonance frequency is high than in an instance where the intensity of the vibration of the unsprung resonance frequency is low. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A suspension system for a vehicle, comprising:
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a stabilizer apparatus which includes;
(a) a stabilizer bar whose opposite ends are connected respectively to an unsprung portion on a left-wheel side of the vehicle and an unsprung portion on a right-wheel side of the vehicle and which generates, on the basis of a twist-reacting force thereof, a stabilizer force by which a distance between a sprung portion and the unsprung portion on the left-wheel side and a distance between a sprung portion and the unsprung portion on the right-wheel side are changed relative to each other; and
(b) an actuator which includes an electromagnetic motor as a power source and which is configured to be operated by a force generated by the electromagnetic motor and to change the stabilizer force by an operation thereof;a pair of shock absorbers of a hydraulic type each of which is provided between the sprung portion and the unsprung portion on a corresponding one of the left-wheel side and the right-wheel side and each of which generates an absorber force as a damping force with respect to a relative movement of the sprung portion and the unsprung portion on the corresponding one of the left-wheel side and the right-wheel side toward or away from each other, the pair of shock absorbers respectively including damping-coefficient changing mechanisms each configured to change a damping coefficient that is an ability to generate the absorber force and that is a basis of a magnitude of the absorber force to be generated; and a control device which is configured to control the stabilizer force of the stabilizer apparatus by controlling the operation of the actuator of the stabilizer apparatus and which is configured to control the damping-coefficient changing mechanisms of the pair of shock absorbers, wherein the control device is configured to execute a body-roll damping control in which at least a part of the stabilizer force is controlled to act as a roll damping force having a magnitude in accordance with a roll speed of a body of the vehicle, wherein the control device is configured to change, in the body-roll damping control, a degree of the magnitude of the roll damping force by the stabilizer force and is configured to control, under execution of the body-roll damping control, the damping coefficient of each of the pair of shock absorbers such that a component of the absorber force which is generated by said each of the pair of shock absorbers and which is for damping roll of the body of the vehicle becomes smaller in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is high than in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is low, and wherein the control device is configured such that, in the body-roll damping control, the degree of the magnitude of the roll damping force by the stabilizer force becomes lower in an instance where a charged amount of a battery that is a supply source of an electric power to the electromagnetic motor is smaller than in an instance where the charged amount of the battery is large. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A suspension system for a vehicle, comprising:
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a stabilizer apparatus which includes;
(a) a stabilizer bar whose opposite ends are connected respectively to an unsprung portion on a left-wheel side of the vehicle and an unsprung portion on a right-wheel side of the vehicle and which generates, on the basis of a twist-reacting force thereof, a stabilizer force by which a distance between a sprung portion and the unsprung portion on the left-wheel side and a distance between a sprung portion and the unsprung portion on the right-wheel side are changed relative to each other; and
(b) an actuator configured to change the stabilizer force by an operation thereof,a pair of shock absorbers of a hydraulic type each of which is provided between the sprung portion and the unsprung portion on a corresponding one of the left-wheel side and the right-wheel side and each of which generates an absorber force as a damping force with respect to a relative movement of the sprung portion and the unsprung portion on the corresponding one of the left-wheel side and the right-wheel side toward or away from each other, the pair of shock absorbers respectively including damping-coefficient changing mechanisms each configured to change a damping coefficient that is an ability to generate the absorber force and that is a basis of a magnitude of the absorber force to be generated; and a control device which is configured to control the stabilizer force of the stabilizer apparatus by controlling the operation of the actuator of the stabilizer apparatus and which is configured to control the damping-coefficient changing mechanisms of the pair of shock absorbers, wherein the control device is configured to execute a body-roll damping control in which at least a part of the stabilizer force is controlled to act as a roll damping force having a magnitude in accordance with a roll speed of a body of the vehicle, wherein the control device is configured to change, in the body-roll damping control, a degree of the magnitude of the roll damping force by the stabilizer force and is configured to control, under execution of the body-roll damping control, the damping coefficient of each of the pair of shock absorbers such that a component of the absorber force which is generated by said each of the pair of shock absorbers and which is for damping roll of the body of the vehicle becomes smaller in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is high than in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is low, and wherein the control device is configured such that, in the body-roll damping control, the degree of the magnitude of the roll damping force by the stabilizer force becomes higher in an instance where an intensity of at least one of a heave vibration of the body of the vehicle and a pitch vibration of the body of the vehicle is high than in an instance where the intensity of the at least one of the heave vibration of the body of the vehicle and the pitch vibration of the body of the vehicle is low. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A suspension system for a vehicle, comprising:
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a stabilizer apparatus which includes;
(a) a stabilizer bar whose opposite ends are connected respectively to an unsprung portion on a left-wheel side of the vehicle and an unsprung portion on a right-wheel side of the vehicle and which generates, on the basis of a twist-reacting force thereof, a stabilizer force by which a distance between a sprung portion and the unsprung portion on the left-wheel side and a distance between a sprung portion and the unsprung portion on the right-wheel side are changed relative to each other; and
(b) an actuator configured to change the stabilizer force by an operation thereof;a pair of shock absorbers of a hydraulic type each of which is provided between the sprung portion and the unsprung portion on a corresponding one of the left-wheel side and the right-wheel side and each of which generates an absorber force as a damping force with respect to a relative movement of the sprung portion and the unsprung portion on the corresponding one of the left-wheel side and the right-wheel side toward or away from each other, the pair of shock absorbers respectively including damping-coefficient changing mechanisms each configured to change a damping coefficient that is an ability to generate the absorber force and that is a basis of a magnitude of the absorber force to be generated; and a control device which is configured to control the stabilizer force of the stabilizer apparatus by controlling the operation of the actuator of the stabilizer apparatus and which is configured to control the damping-coefficient changing mechanisms of the pair of shock absorbers, wherein the control device is configured to execute a body-roll damping control in which at least a part of the stabilizer force is controlled to act as a roll damping force having a magnitude in accordance with a roll speed of a body of the vehicle, wherein the control device is configured to change, in the body-roll damping control, a degree of the magnitude of the roll damping force by the stabilizer force and is configured to control, under execution of the body-roll damping control, the damping coefficient of each of the pair of shock absorbers such that a component of the absorber force which is generated by said each of the pair of shock absorbers and which is for damping roll of the body of the vehicle becomes smaller in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is high than in an instance where the degree of the magnitude of the roll damping force by the stabilizer force is low, and wherein the control device is configured such that, in the body-roll damping control, the degree of the magnitude of the roll damping force by the stabilizer force becomes higher in an instance where a running speed of the vehicle is high than in an instance where the running speed of the vehicle is low. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification