摘要:
A suspension system for a vehicle, which suspension system comprises: a damping assembly (630) operatively connected to an actuator (120); a controller (65) for controlling movement of said actuator (120) whereby a damping rate of said damping assembly (630) is adjusted by movement of the actuator; and a signal generating device (50) remote from said damping assembly, which device, in use, provides an output electric signal representing a desired user adjustment to the damping rate of said damping assembly (630), said controller (65) adapted to receive said electric signal and control said actuator (120) to adjust said damping rate according to said electric signal, whereby said damping rate may be remotely altered during use of said vehicle.
摘要:
A suspension apparatus includes: a cylinder connected to one of a sprung member and an unsprung member, an interior space of the cylinder being partitioned into a piston upper chamber and a piston lower chamber; a piston connected to the other of the sprung member and the unsprung member; an expansion side friction member configured to damp a movement of the piston, a force of the expansion side friction member for damping the movement of a piston being increased by exerting a pressure of the piston upper chamber on the expansion side friction member; and a contraction side friction member configured to damp the movement of the piston, a force of the contraction side friction member for damping the movement of the piston being increased by exerting a pressure of the piston lower chamber on the contraction side friction member.
摘要:
A damping force control apparatus includes a damping force control means (CC) controlling a damping force of a shock absorber (AB) provided between a sprung mass and an unsprung mass of each wheel (WH) of a vehicle, a detection means (DT) detecting at least an acceleration of the sprung mass in an up-down direction and a relative displacement between the sprung mass and the unsprung mass, a damping coefficient calculation means (CE) calculating a damping coefficient to be applied to the damping force control by the damping force control means (CC) based on detected results of the detection means (DT), a sensed acceleration increment calculation means (WF) calculating a sensed acceleration increment corresponding to an increment of sense according to the Weber Fechner law on the basis of the detected results of the detection means (DT), and a modification means (MD) modifying the damping coefficient in accordance with a sensed acceleration increment calculated by the sensed acceleration increment calculation means (WF).
摘要:
In a suspension control system, accelerations detected by acceleration sensors are differentiated by a differentiator to calculate acceleration derivative values. Based on these values, a target electrical current calculating section calculates a target electrical current that is supplied to an actuator which controls a damping force of a damper. Before a rolling or pitch angle occurs in the vehicle, the change of the rolling or pitch angle is predicted to control the damping force of the damper, thereby improving the response of rolling angle and pitch angle control to achieve, simultaneously, an accurate posture control and a satisfactory riding comfort. Because the target electrical current calculating section corrects the target electrical current of the actuator based on a damper speed obtained by differentiating a damper displacement, even when a large input is applied to the damper due to an unevenness of the road surface, a proper posture control is performed.
摘要:
A method and apparatus for dynamically leveling the attitude of a vehicle (102) using a low power fully active suspension system (100). The system (100) connects the front and rear suspensions (114 and 104) and body (103) of the vehicle (102) and includes a hydraulic damper (110) having a pressure cylinder (144) forming a working chamber (146) in which a piston and rod assembly (148) is movably disposed. The system (100) further comprises a flow control device (130) fluidly communicating with the working chamber (146) on one side of the piston (148) for adding and exhausting damping fluid therefrom to a central pressure source (132), and an accumulator (128) fluidly communicating with the working chamber (146) on the opposite side of the piston (148). The system (100) having flow restriction valving (156) for selectively controlling the flow of fluid with said working chamber (146). The flow restriction valving (156) located between the flow control device (130) and the accumulator (128). The lower power fully active suspension system (100) is adapted to produce a desired suspension force output through selective actuation of the flow control device (130) and the flow restriction valving (156) for limiting the duty cycle and power requirements of the central pressure source (132).
摘要:
The proposed control system comprises active or semi-active ride-control and anti-blocking system (ABS) and/or anti-slip control (ASC) components, with common sensors and common data-processing or control circuits. The invention calls for the processing circuits to determine a safety level, and for the control circuits to provide the ABS/ASC components and the ride-control system with control signals as a function of this safety level. These measures enable optimum use to be made of existing sensors and control units, as well as making it particularly simple to allow for the interdependence between road-surface irregularities and steering. A comfortable ride is obtained at all times, while still meeting all safety requirements, and there are also safety and speed benefits for the ABS/ASC system.
摘要:
A device and a process are disclosed for regulating the chassis of vehicles, in particular private cars and utility vehicles, comprising the following steps: detection by sensors of the dynamic driving state and processing of the detected data on the driving state in order to generate a control signal for semi-active shock absorbers, preferably associated to each wheel of the vehicle, the shock absorbing capacity of which can be adjusted to a minimum possible value in certain situations, depending on the driving state. The semi-active shock absorber (5) can be alternatively adjusted to a maximum strong or maximum weak dampening power (alternative adjustment) when a desired active dampening effect, in the present working conditions, cannot be achieved. The alternative adjustment of the semi-active shock absorber (5) is made according to the control signal (U1) and to the real dampening power (Fd).
摘要:
Operation of a continuously variable semiactive damper of the system is modified so as to reduce generation in the system of undesirable shocks and noise. The modifications include delaying some or all of the changes in the on/off states of the damper, and/or limiting the rate and/or extent of changes in the damping coefficient of the damper at certain of the times when the damper is in an on state.