http://autospeed.drive.com.au/cms/A_108635/article.html

Active Engine Mounts

Automotive engine mounts are designed to support the engine and reduce vibrations and force transmitted from the engine to the vehicle structure, and from road surface irregularities. Providing adequate engine support requires a firm engine mount, while controlling vibration and force requires a flexible mount.

With changes in vehicle technology, there are more requirements being placed on engine mount performance. Standard hard rubber, passive mounts provide firm support for the engine. However, the use of hard rubber allows engine vibrations to be easily transmitted to the chassis.

Active engine mount systems overcome these conflicting requirements by combining an engine mount that provides good support properties with an actuator to control engine vibrations, and vibrations from road surface irregularities.

Vehicles that may be equipped with an active engine mount system include, but are not limited to, the 2006 Jaguar XJ, 2007 Hyundai Veracruz, 2007 Lexus RX350, and 2007 Toyota Camry.

The 2006 Jaguar XJ equipped with a 2.7 twin-turbo diesel features electronically controlled active engine mounts, designed to cancel most of the engine vibration at idle. Because diesel engines generate higher levels of vibration than gasoline engines, electronically controlled active engine mounts are used on all 2006 XJ diesels.

The pictured 2007 Hyundai Veracruz has electronically controlled engine mounts on both diesel and gasoline engine models. The Hyundai engine mount system consists of three passive mounts integrated with active controls, to offset vibrations.

Some Lexus and Toyota models also use an active engine mount system. The engine mount system used on the 2007 Lexus RX350 and Toyota Camry is called the Active Control Engine Mount (ACM) system. On this system, the rear of the engine is attached to the chassis by a fluid-filled mount to control vibration and noise. The front of the engine is attached to the chassis by an electronically controlled active mount that continuously adapts to the driving conditions.

The ACM system decreases engine vibration at idling using a vacuum switching valve (VSV). The VSV is controlled by a pulse signal, which is transmitted to the VSV from the electronic control module. The frequency of this pulse signal is matched to the engine speed to decrease engine vibration.

What next active Mitsu 380 sales. ;-)