Toyota Active Control Suspension

ST183 Celica, called the Active Sports.^[2] This was the first production car in the world to utilise an active suspension system. The suspension employed conventional coil-spring struts and 4-wheel steering. No anti-roll (stabiliser) bars were fitted as the strut damping was actively controlled by a combined power steering/suspension fluid pump and valve body that counteracted roll and pitch forces. This system of controlling damping force while utilising conventional springs was largely achieved with the much simpler Toyota Electronic Modulated Suspension

accelerometers, suspension height and wheel speed) that detected cornering, acceleration and braking forces. The system worked well and gave an unusually controlled yet smooth ride with no body roll.^[3] However, the additional weight and power requirements of the system affected straight-line performance somewhat.^[4][5]