An integrated chassis control method to improve driving stability may include mountain-road integrated chassis control allowing, when a road on which a vehicle drives is checked to be the route of a mountain road by an integrated chassis controller, electronic control suspension (ECS) damping force and all wheel drive (AWD) driving force distribution to be controlled in a different manner according to uphill and downhill roads due to a difference of elevation of the mountain road.

An electric suspension apparatus includes electric actuators provided for a plurality of wheels, respectively, an acceleration sensor disposed in each of the electric actuators, the acceleration sensor detecting a first acceleration, and an electric suspension control ECU controlling each of the electric actuators based on the first acceleration, and the electric suspension control ECU decreases a control amount to the electric actuator, in a case where a first speed based on the first acceleration in an up-down direction is equal to or less than a predetermined speed.

A system and method are provided for configuring suspension ratios in a multi-rear axle vehicle, the vehicle having a drive axle suspension and at least one tag axle suspension, each suspension having one or more air springs. The timing of the performance of an adjustment cycle series of steps for adjusting the suspension height and air spring pressure readings is optimized by monitoring the acceleration of the vehicle and conducting the adjustment cycle steps when the vehicle acceleration is below an acceleration threshold. Additionally, air spring pressure adjustments may be scaled based on a confidence factor of the air spring pressure readings. Finally, a method is provided for configuring suspension ratios in a multi-rear axle vehicle, the vehicle having a drive axle suspension and at least one tag axle suspension, and for adjusting the air suspension pressures.

A road surface condition is determined appropriately. A road surface determining section (84) configured to determine a road surface condition with reference to a wheel speed signal indicative of wheel speeds includes a band-stop filter (841) which acts on the wheel speed signal and has a cutoff frequency band which is changed in accordance with the wheel speed signal.

A suspension device includes an actuator device provided with an extensible/contractible actuator body interposed between a sprung member and an unsprung member of a vehicle, a pump that supplies fluid to the actuator body to extend or contract the actuator body, and a controller that controls a rotation number of the pump. The controller has a road surface state index obtainment unit that obtains a road surface state index and a target rotation number determination unit that determines a target rotation number of the pump on the basis of the road surface state index.

In a turning system for a vehicle, a toe angle change is acquired based on an estimated stroke which is a stroke of a suspension which is estimated based on a moving state of a vehicle and an actual stroke which is an actual stroke of the suspension detected by a stroke sensor, and control of a turning angle of a vehicle wheel is performed based on the acquired toe angle change. Accordingly, it is possible to appropriately perform control of a turning angle even in travel.

A damping control apparatus includes a control device for controlling actuators that generate forces acting between a vehicle body and wheels. The control device stores a single wheel model of a vehicle including a skyhook device having a damper, a spring and an inerter. The control device calculates a product of an acceleration detected by an acceleration sensor and an equivalent mass of the inerter, a product of a once integrated value of the acceleration and a damping coefficient of the damper, a product of a twice integrated value of the acceleration and, a spring constant of the spring as target damping forces to be applied to a sprung mass, and controls the actuators based on target generative forces based on the target damping forces.

A vehicle attitude control apparatus is provided in which an active suspension device of each wheel has a mass body arranged between a sprung mass and an unsprung mass of a vehicle, and upper and lower actuators each configured to generate an actively generated force acting on the sprung and unsprung masses, respectively, by applying urging forces to the masses, and a control unit calculates a target braking/driving force of each braking/driving device for achieving target motion state quantities of the vehicle, target actively generated forces of the upper and lower actuators, and controls a braking/driving device and the upper and lower actuators, so that the target braking/driving force and the target actively generated forces of the upper and lower actuators are achieved.

Embodiments of the present invention provide a control system (100) for determining a suspension calibration of a vehicle (800). The control system (100) has one or more controllers (120) that receive route data indicative of a route ahead of the vehicle (800). One or more processors (130) determine, from the route data, a prediction of a first acceleration at a first location (320) ahead of the vehicle (800) and a second acceleration at a second location (330) ahead of the first location(320). The one or more processors (130) determine a suspension calibration of the vehicle (800) in dependence on the second acceleration. The actual acceleration of the vehicle (800) is measured at the first location (320) and compared with the first acceleration. If the measured and first acceleration are within a predetermined tolerance, the processor (120) produces a suspension control signal at output (121) which is received by a suspension controller (140) to apply the suspension calibration prior to the vehicle (800) arriving at the second location (330).

Methods and systems are provided for adjusting a height of an electric vehicle with an adjustable suspension system. In one example, a method comprises: during a vehicle stop event, adjusting a height of a skateboard frame of an electric vehicle via an adjustable suspension system, based on at least one sensor input indicative of a desired skateboard frame height. In this way, user activities, including loading and unloading, may be facilitated.