The sprung mass is the mass of the vehicle supported on the springs, while the unsprung mass is loosely defined as the mass between the road and the suspension springs.

• 弹簧上方的质量是指弹簧上方支撑的车体的质量，而弹簧下方的质量通常是指路面与悬挂的弹簧之间的车体的质量。