Multi-mode magneto-rheological vibration isolator of passenger vehicle engine

The invention discloses a multi-mode magneto-rheological vibration isolator of a passenger vehicle engine. The multi-mode magneto-rheological vibration isolator comprises an upper housing, a lower housing buckled with and fixed to the upper housing, a main rubber spring plugging an open position of the top end of the upper housing, a connecting rod penetrating through the main rubber spring, a rubber bottom membrane arranged at the bottom of the inner side of the lower housing and a magnetic core assembly arranged above the rubber bottom membrane and dividing the inner cavity of the vibrationisolator into an upper cavity and a lower cavity. The inner cavity of the vibration isolator is full of a magneto-rheological fluid, and the lower end of the connecting rod is coaxially and fixedly provided with a columnar elastomer. The magnetic core assembly comprises an extruding magnetic core fixed to the lower end of the elastomer, a cylindrical shell shaped inner magnetic core group conformally wrapping the extrudin