Abstract: A suspension control system includes: a pitch moment computation unit configured to compute a target pitch moment; a distribution ratio computation unit configured to compute a front and rear distribution ratio based on a roll rate and a vehicle speed, to compute a front distribution ratio based on the roll rate and the vehicle speed, and to compute a rear distribution ratio based on the roll rate and the vehicle speed; and a damping force computation unit configured to compute target damping forces of the dampers corresponding to respective front wheels based on the target pitch moment, the front and rear distribution ratio, and the front distribution ratio, and to compute target damping forces of the dampers corresponding to respective rear wheels based on the target pitch moment, the front and rear distribution ratio, and the rear distribution ratio.

Abstract: A suspension control system includes: variable damping force dampers provided between a vehicle body and each wheel; a roll rate output unit configured to determine if a steering angle speed based on a steering angle is equal to or greater than a prescribed determination value, to output a roll rate detected by a roll rate sensor if the steering angle speed is equal to or greater than the determination value, and to output zero if the steering angle speed is less than the determination value; a pitch moment computation unit configured to compute a target pitch moment of the vehicle body based on an output of the roll rate output unit; and a damping force computation unit configured to compute a target damping force of each damper based on the target pitch moment.

Abstract: A control system for a variable damping force damper, includes: motion state quantity sensors configured to detect motion state quantities of a vehicle; a roll damping force base value setting unit configured to set a roll damping force base value based on the motion state quantities, the roll damping force base value being used to compute a target damping force of the variable damping force damper; a roll rate computation unit configured to compute a sprung mass roll rate and an unsprung mass roll rate of the vehicle based on the motion state quantities; and a roll damping force correction unit configured to correct the roll damping force base value based on a roll rate difference that is a difference between the sprung mass roll rate and the unsprung mass roll rate and to output the corrected roll damping force base value as the target damping force.

Abstract: In a suspension control system (20) including a variable damper (6fl, 6fr) provided between a vehicle body and each of left and rear front wheels (2fl, 2fr), a ground contact load computation unit (31) computes a front wheel target ground contact load according to a fore and aft acceleration of the vehicle body. A ground contact load distribution unit (32) computes target ground contact loads of the left and right front wheels by varying a distribution of the front wheel target ground contact load between the left front wheel and the right front wheel according to a direction and a magnitude of the fore and aft acceleration and/or a direction and a magnitude of a lateral acceleration of the vehicle body, and a damping force computation unit (33) sets a target damping force of each variable damper according to the target ground contact loads of the front wheels.

Abstract: Provided is an examination method for a damping force variable mechanism, the examination method including: an operation step of operating a damper in a state in which the damper is installed in a vehicle, the damper being provided with a damping force variable mechanism that changes a damping force according to an input current (an example of a signal); and a detection step of detecting an induction current (an example of an output from the vehicle) from the damping force variable mechanism of the damper installed in the vehicle, wherein a detection device that performs the operation of the detection step is provided. Thus, the damping force variable mechanism of a pressure damping device can be examined in a state in which the damping force variable mechanism is installed in the vehicle.

Abstract: A suspension controller includes a wheel speed sensor that detects the wheel speed of each wheel, a basic input amount calculating unit that calculates the basic input amount of the vehicle on the basis of a wheel speed variation detected by the wheel speed sensor, a state amount calculating unit that calculates the state amount of the vehicle by inputting the basic input amount to a vehicle model representing the motion of the vehicle, and a damper controlling unit that controls the damping force of a damping-force-variable damper on the basis of the calculated state amount. If the wheel speed variation detected by the wheel speed sensor decreases below zero by a predetermined value or more on the minus side, the vertical load of the wheel is considered to be decreased, and the damping force is controlled to be greater than before the decrease.

Abstract: Provided is an examination method for a damping force variable mechanism, the examination method including: an operation step of operating a damper in a state in which the damper is installed in a vehicle, the damper being provided with a damping force variable mechanism that changes a damping force according to an input current (an example of a signal); and a detection step of detecting an induction current (an example of an output from the vehicle) from the damping force variable mechanism of the damper installed in the vehicle, wherein a detection device that performs the operation of the detection step is provided. Thus, the damping force variable mechanism of a pressure damping device can be examined in a state in which the damping force variable mechanism is installed in the vehicle.

Abstract: A suspension controller includes a wheel speed sensor that detects the wheel speed of each wheel, a basic input amount calculating unit that calculates the basic input amount of the vehicle on the basis of a wheel speed variation detected by the wheel speed sensor, a state amount calculating unit that calculates the state amount of the vehicle by inputting the basic input amount to a vehicle model representing the motion of the vehicle, and a damper controlling unit that controls the damping force of a damping-force-variable damper on the basis of the calculated state amount. If the wheel speed variation detected by the wheel speed sensor decreases below zero by a predetermined value or more on the minus side, the vertical load of the wheel is considered to be decreased, and the damping force is controlled to be greater than before the decrease.

Abstract: Provided is a configuration including a basic input amount detecting unit configured to calculate a basic input amount of the vehicle, based on wheel speed fluctuation amount which a wheel speed sensor has detected; a first target current setting unit configured to set a first target current, based on the basic input amount; a second target current setting unit configured to set a second target current, based on vehicle acceleration detected by an acceleration sensor; and a damper control unit configured to control dampers, based on the first target current if a vehicle behavior control device is not operating, and based on the second target current if the vehicle behavior control device is operating.

Abstract: A suspension control system allows a state variable of a vehicle used for the damper damping force control to be computed at a high precision without regards to the caster angle given to the suspension geometry. A suspension control system for a vehicle provided with a variable damper that can adjust a damping force according to an input signal comprises a wheel rotational speed sensor for detecting a wheel rotational speed, a gain circuit for computing the unsprung load of each wheel according to the wheel rotational speed variation detected by the wheel speed sensor, a single wheel model computing unit for computing the sprung velocity and the stroke speed by inputting the unsprung load to a single wheel model representing the behavior of the vehicle, and a damper control unit for controlling a damping force of the variable damper according to the computed sprung velocity and stroke speed.

Abstract: Provided is a configuration including a basic input amount detecting unit configured to calculate a basic input amount of the vehicle, based on wheel speed fluctuation amount which a wheel speed sensor has detected; a first target current setting unit configured to set a first target current, based on the basic input amount; a second target current setting unit configured to set a second target current, based on vehicle acceleration detected by an acceleration sensor; and a damper control unit configured to control dampers, based on the first target current if a vehicle behavior control device is not operating, and based on the second target current if the vehicle behavior control device is operating.