摘要:
An apparatus for controlling the damping coefficient of shock absorbers which are associated with the road wheels of the vehicle, produces control signals using one or more of a bouncing rate, a pitching rate and a rolling rate value which is filtered out of a plurality of outputs provided by a plurality of acceleration sensors which are each located in proximity of a shock absorber. The control signal can be modified using the outputs of weight sensors which are used to derive the relative velocities of the road wheels with respect to the vehicle body.
摘要:
A suspension control system for an automotive vehicle is provided. This suspension control system comprises variable damping force shock absorbers and a control unit which controls the shock absorbers to assume damping force characteristics in a range between preselected higher and lower damping coefficients. The control unit is operable to provide a control parameter indicative of bouncing motion of a vehicle body based on sprung vertical speed to determine a damping coefficient against the bouncing motion. When the control parameter is greater than a threshold value, the damping coefficient is modified to a lower value, while when the control parameter is less than the threshold value, the damping coefficient is modified to a higher value. With this damping coefficient modification, the bouncing motion is suppressed effectively while assuring passenger comfort.
摘要:
An apparatus for controlling damping coefficients for respective vehicular shock absorbers is disclosed in which a plurality of shock absorbers are interposed between predetermined parts of a vehicle body and tire wheel and are provided with damping coefficient changing members, each changing member varying the coefficients of the damping shock absorbers at multiple stages by changing position of an associated actuator, the actuator receiving a signal to change the position of the damping coefficient changing member on the basis of an input signal derived from a sprung mass vertical G sensor. Particularly, a correction portion is provided in a control unit which varies a position change rate of the damping coefficient changing member according to a value of the input signal derived from an input signal sensor, e.g., the sprung mass vertical G sensor.
摘要:
An anti-rolling motion control system for an automotive vehicle is provided. This control system comprises shock absorbers each being variable of a damping coefficient within a range from softer to harder damping characteristics, a steering sensor for monitoring a steered angle of a steering wheel, and a rolling motion control unit. The rolling motion control unit is operable to derive steered angular velocity based on the steered angle of the steering wheel. The rolling motion control unit controls the shock absorbers so that the damping coefficients are modified to exhibit the harder damping characteristics when the steered angular velocity and the steered angle are greater than preselected first and second threshold values respectively for suppressing rolling motion of a vehicle body effectively while securing traveling stability.
摘要:
A suspension control system for an automotive vehicle is disclosed in which, in each shock absorber, interposed between the vehicular body and tire wheel, a damping coefficient varying adjuster is provided which changes a damping coefficient at either or both of piston stroke sides according to a control signal input thereto so that the damping coefficient is set to a target damping coefficient position, at lease one sprung mass acceleration sensor and at least one sprung mass speed sensor are provided, and the control unit is provided which outputs the control signal to the damping coefficient varying means according to a result of determination of whether the vertical sprung mass acceleration exceeds a predetermined threshold value and according to a direction and magnitude of the sprung mass speed so that the damping coefficient at either or both of the stroke sides is controlled to a target damping coefficient position.
摘要:
A system for controlling damping force characteristics for respective shock absorbers of a vehicle in which each shock absorber is installed between sprung mass and unsprung mass at each tire wheel position, a front tire wheel side sprung mass vertical velocity and a front tire wheel side relative velocity between the sprung mass and unsprung mass are determined, the damping force characteristics of the shock absorbers located at the front tire wheels side are basically controlled on the basis of the control signal determined on the basis of the front tire wheel side sprung mass vertical velocity, and the damping force characteristics of the shock absorbers located at the rear tire wheels side are, on the other hand, controlled on the basis of the control signal determined on the basis of a front tire wheel side road surface input velocity determined on the basis of the front tire wheel side sprung mass vertical velocity and the front tire wheel side relative velocity determined from a front tire wheel side relative displacement and a rear tire wheel side vertical velocity determined from the rear tire wheel side relative velocity.
摘要:
A power steering apparatus includes a hydraulic power cylinder, and a reversible pump driven by a motor and connected by left and right fluid passages with left and right pressure chambers of the power cylinder. The first and second fluid passages are so arranged that pressure losses in the first and second passages are substantially equal to each other.
摘要:
In order to realize cost reduction in a gear pump apparatus by reducing form accuracy of a gear while securing pump performance, a running-in coating is provided on a tooth sliding contact portion when forming a confinement area in at least one of gears of the gear pump apparatus. By this feature, the running-in coating is gradually worn away and deformed according to rotary drive of the pump, and thus it is possible to obtain an optimal gear form in meshing combinations of the gears. Further, it is possible to reduce leakage inside the pump to secure the pump performance even if the form accuracy of the gear is reduced for the sake of the cost reduction.
摘要:
In a power steering system comprising a power cylinder for assisting a steering power of a steering mechanism, a hydraulic pump for supplying a hydraulic pressure to the power cylinder, a first oil passage and a second oil passage connecting the power cylinder and the hydraulic pump respectively, a motor for driving the hydraulic pump, and power steering control means for calculating a command value to the motor based on the steering torque, a flow rate of the working oil supplied from a high-pressure side oil passage to a low-pressure side oil passage is restrained at the transition from the end of the steering state (lock end) of the steering mechanism to the returning. The flow-rate restraint increasingly corrects a driving current of the motor in the steering direction or limits the flow rate of the working oil.
摘要:
A power steering apparatus includes a hydraulic power cylinder, and a reversible pump driven by a motor and connected by left and right fluid passages with left and right pressure chambers of the power cylinder. The first and second fluid passages are so arranged that pressure losses in the first and second passages are substantially equal to each other.