A work vehicle includes a vehicle body, running gear to cause the vehicle body to travel, a height adjuster to change a height of a center of gravity of the vehicle body, and a controller configured or programmed to, in accordance with at least one of a turning radius and an angular velocity of the vehicle body during a turn, control the height adjuster to maintain or lower the height of the center of gravity.

An electronic control suspension apparatus for controlling a damping force of a damper installed at each of a front wheel and a rear wheel includes: a reception unit configured to receive a vehicle manipulation signal; a driver tendency analysis unit configured to calculate a driver tendency analysis value by analyzing a driver's driving tendency based on the vehicle manipulation signal received by the reception unit; a driver mode determination unit configured to determine a driver mode to which the driver tendency analysis value calculated by the driver tendency analysis unit belongs; and a damping force control unit configured to control the damping force of the damper by changing a current value to be applied to a solenoid valve according to the determined driver mode.

An electronically controlled suspension control system of a vehicle using road surface information may include a road surface recognition unit of recognizing a road surface, a road surface profile determination unit of determining a road surface profile using information as to the recognized road surface, a behavior estimation and determination unit of estimating and determining a vehicle behavior according to the determined road surface profile, a behavior information recording unit storing information as to the behavior of the vehicle, an electronically controlled suspension (ECS) control unit of controlling a suspension of the vehicle, and a behavior determination and control unit of comparing a determined value from the behavior estimation and determination unit with recorded values of the behavior information recording unit, determining a behavior level of the vehicle, based on results of the comparison, and sending a control command according to the determined behavior level to the ECS control unit.

A vehicle actuator system includes an actuator, a first actuator controller that is operable to control operation of the actuator and is operable to determine a first value for a parameter that relates to operation of the actuator, a second actuator controller that is operable to control operation of the actuator and is operable to determine a second value for the parameter, and at least one additional component that is operable to determine a third value for the parameter. A fault is identified in response to determining that the first value does not agree with at least one of the second value or the third value. In response to identification of the fault, the first actuator controller changes from an activated state to a deactivated state and the second actuator controller changes from a deactivated state an activated state.

An embodiment of the present invention allows for application of an assist torque or reaction torque which causes a driver to feel less discomfort. An ECU (600) includes a rack shaft axial force estimating section (620) configured to estimate a rack shaft axial force with reference to a roll rate of a vehicle body.

An electronically controlled suspension control system of a vehicle using road surface information may include a road surface recognition unit of recognizing a road surface, a road surface profile determination unit of determining a road surface profile using information as to the recognized road surface, a behavior estimation and determination unit of estimating and determining a vehicle behavior according to the determined road surface profile, a behavior information recording unit storing information as to the behavior of the vehicle, an electronically controlled suspension (ECS) control unit of controlling a suspension of the vehicle, and a behavior determination and control unit of comparing a determined value from the behavior estimation and determination unit with recorded values of the behavior information recording unit, determining a behavior level of the vehicle, based on results of the comparison, and sending a control command according to the determined behavior level to the ECS control unit.