摘要:
A suspension system for a vehicle, including: four displacement force generators each having an electromagnetic motor and configured to generate, based on a motor force generated by the motor, a displacement force forcing sprung and unsprung portions of the vehicle toward or away from each other; and a controller configured to control the displacement force generated by controlling operation of the motor is disclosed. The controller includes a target-value determining portion configured to determine a target value of a displacement-force-relating amount of each of the four displacement force generators, and a target-value reducing portion configured to reduce the target value of the displacement-force-relating amount of a subjected device as one of the four displacement force generators, in accordance with a certain rule. The target-value reducing portion is configured to reduce the target value of the displacement-force-relating amount of each of at least one of non-subjected devices as the other three of the four displacement force generators, in accordance with the certain rule, when reducing the target value of the displacement-force-relating amount of the subjected device in accordance with the certain rule.
摘要:
A suspension controller for controlling, based on a value detected by at least one sensor which is provided in a vehicle and which is configured to detect a detected portion, a suspension provided for a wheel of the vehicle which is located on a rear side of the detected portion and which is distant from the detected portion by a longitudinal distance in a longitudinal direction of the vehicle, such that the suspension works in accordance with a control command value that is prepared based on the value detected by the at least one sensor. The suspension controller includes a gain determiner configured to determine a gain, for controlling the suspension based on the determined gain. The gain determiner is configured to determine the gain such that the determined gain is smaller when a previewable time is shorter than a threshold length of time, than when the previewable time is not shorter than the threshold length of time.
摘要:
A suspension system for a vehicle, including: (a) four displacement force generators each having an electromagnetic motor and configured to generate, based on a motor force generated by the motor, a displacement force forcing sprung and unsprung portions of the vehicle toward or away from each other; and (b) a controller configured to control the displacement force generated by controlling operation of the motor. The controller includes (b-1) a target-value determining portion configured to determine a target value of a displacement-force-relating amount of each of the four displacement force generators, and (b-2) a target-value reducing portion configured to reduce the target value of the displacement-force-relating amount of a subjected device as one of the four displacement force generators, in accordance with a certain rule. The target-value reducing portion is configured to reduce the target value of the displacement-force-relating amount of each of at least one of non-subjected devices as the other three of the four displacement force generators, in accordance with the certain rule, when reducing the target value of the displacement-force-relating amount of the subjected device in accordance with the certain rule.
摘要:
To offer a suspension apparatus for a vehicle with high utility, a suspension apparatus having a damping-force generating device which includes a body-side unit attached so as to project upward from a mount portion formed at a part of the vehicle is provided with a projecting-portion-displacement permitting mechanism for permitting a displacement of at least a projecting portion such that an amount of projection of the projecting portion decreases. The projecting-portion-displacement permitting mechanism is configured as follows, for instance. In a structure in which a downward movement of the body-side unit is prohibited by a pin of a solenoid, the solenoid is energized and the pin is withdrawn, thereby releasing the prohibition of the movement of the body-side unit. In consequence, the body side-unit is permitted to move downward. The mechanism increases a distance between an upper end of the damping-force generating device and a hood disposed above the mount portion, so that an impact applied to the hood from above can be effectively mitigated utilizing a space between the upper end of the damping-force generating device and the hood in which the distance therebetween is increased.
摘要:
A vehicle suspension system for a vehicle, including: (a) a plurality of suspension cylinders each disposed between a chassis-side member and a corresponding one of a plurality of wheel-side members; (b) a controller cylinder including a housing and at least one piston slidably mounted in the housing, such that the housing and the at least one piston cooperate to define a plurality of chambers each having a volume that is variable upon slide movement of the at least one piston relative to the housing; (c) individual conduits each communicating a corresponding one of the plurality of chambers of the controller cylinder and a chamber of a corresponding one of the plurality of suspension cylinders; and (d) a suspension-cylinder operation facilitator operable to facilitate an operation of each of the plurality of suspension cylinders for permitting displacement of each of the plurality of wheel-side members relative to the chassis-side member after the at least one piston of the controller cylinder has reached its stroke end.
摘要:
A tire air-pressure alarming device includes wheel speed sensors for detecting wheel speeds of wheels of a motor vehicle and also includes a microcomputer-base control device and an alarming unit. The control device is programmed to execute function steps of: deriving a decision value based on the wheel speeds detected by the wheel speed sensors; judging the occurrence of air-pressure drop of the tires constituting wheels, based on the decision value; and outputting a command when the occurrence of the air-pressure drop of the tires is judged. The alarming unit is responsive to the command from the control device thereby to raise an alarm indicating the occurrence of the air-pressure drop of the tire. The tires are monitored by the tire air-pressure alarming device, wherein the control device is also programmed to execute a function step of standardizing the speed dependency of a rolling radius of the tires thereby to standardize the performance in judging the air-pressure drop of the tires. Thus, the tire property can be controlled to improve the accuracy in detecting the tire air-pressure drop.
摘要:
A suspension system for a vehicle, including: (a) a suspension spring; (b) a hydraulic damper; (c) a displacement force generator disposed in parallel with the suspension spring and the damper; and (d) a controller including a damping-force controlling portion for controlling a damping force of the damper and a displacement-force controlling portion for controlling a displacement force of the displacement force generator. The displacement-force controlling portion is configured to execute a sprung-portion vibration damping control for controlling the displacement force, such that the generated displacement force acts as a damping force against sprung-portion vibration. The damping-force controlling portion is configured, upon execution of the sprung-portion vibration damping control, to execute a damping force reducing control for reducing the damping force that is to be generated by the damper, depending on an intensity of unsprung-portion resonance frequency vibration which occurs in the vehicle and which has a resonance frequency of the unsprung portion.
摘要:
A suspension system for a vehicle, including (a) four displacement force generators (152) each configured to generate a displacement force forcing sprung and unsprung portions of the vehicle toward or away from each other; and (b) a control unit (200) configured to control the displacement force that is to be generated by each displacement force generator. The control unit is capable of executing a plurality of vibration damping controls concurrently with each other, by controlling the displacement force, so as to damp a composite vibration containing a plurality of different vehicle-body vibrations which are to be damped by the respective vibration damping controls. The control unit is configured to refrain from executing at least one of the vibration damping controls for damping one of the vehicle-body vibrations that is not required to be damped, in a low vibration intensity situation in which intensities of sprung-portion resonance-frequency vibration components in respective four sprung portions of the vehicle are lower than a threshold intensity degree.
摘要:
A suspension system for a vehicle, including: (a) a suspension spring; (b) a hydraulic damper; (c) a displacement force generator disposed in parallel with the suspension spring and the damper; and (d) a controller including a damping-force controlling portion for controlling a damping force of the damper and a displacement-force controlling portion for controlling a displacement force of the displacement force generator. The displacement-force controlling portion is configured to execute a sprung-portion vibration damping control for controlling the displacement force, such that the generated displacement force acts as a damping force against sprung-portion vibration. The damping-force controlling portion is configured, upon execution of the sprung-portion vibration damping control, to execute a damping force reducing control for reducing the damping force that is to be generated by the damper, depending on an intensity of unsprung-portion resonance frequency vibration which occurs in the vehicle and which has a resonance frequency of the unsprung portion.
摘要:
A suspension system for a vehicle, including (a) four displacement force generators (152) each configured to generate a displacement force forcing sprung and unsprung portions of the vehicle toward or away from each other; and (b) a control unit (200) configured to control the displacement force that is to be generated by each displacement force generator. The control unit is capable of executing a plurality of vibration damping controls concurrently with each other, by controlling the displacement force, so as to damp a composite vibration containing a plurality of different vehicle-body vibrations which are to be damped by the respective vibration damping controls. The control unit is configured to refrain from executing at least one of the vibration damping controls for damping one of the vehicle-body vibrations that is not required to be damped, in a low vibration intensity situation in which intensities of sprung-portion resonance-frequency vibration components in respective four sprung portions of the vehicle are lower than a threshold intensity degree.