Multi-chamber air spring control

A control system for a multi-chamber air spring for a vehicle, the multi-chamber air spring comprising at least a first chamber and a second chamber and a valve therebetween, the control system comprising one or more controllers, the control system configured to:

• receive a close signal to cause the valve to close;
• determine a current profile in dependence on the close signal, the current profile indicative of a current to apply to the valve to cause the valve to close, wherein the current profile comprises a curved portion in which the current increases with a decreasing slope of curvature as a function of time;
• and
• output a signal to the valve indicative of the current profile, the signal configured to cause the valve to close according to the current profile.

A method of operation of a multi-chamber air spring, the multi-chamber air spring comprising at least a first chamber and a second chamber and a valve therebetween, the method comprising:

• receiving a close signal to cause the valve to close;
• determining a current profile in dependence on the close signal, the current profile indicative of a current to apply to the valve to cause the valve to close, wherein the current profile comprises a curved portion in which the current increases with a decreasing slope of curvature as a function of time;
• and
• outputting the current profile to the valve to cause the valve to close according to the current profile.