Active Control Engine Mount

Avalon & Highlander 3.0L V6

Active control engine mount is used to reduce engine vibration and noise when engine is idling. Active control engine mount consists of vacuum tank, active engine control engine mount, Engine Control Module (ECM) and Active Control Mount (ACM) Vacuum Switching Valve (VSV). See Fig. 77 .

Operating range of active control engine mount is during idling when engine speed is less than 900 RPM. ACM VSV receives vacuum supply from the vacuum tank. Signals that are synchronized to the engine speed are

2001 ENGINE PERFORMANCE Theory & Operation delivered from the ECM to the ACM VSV. Engine vacuum is used to vary the pressure in the active control engine mount. As a result, the diaphragm in the active control engine mount vibrates and uses the liquid in the main liquid chamber to control engine mount vibration. The force of the vibration in the active control engine mount is regulated by the orifice and the side branch, which vents out to the atmosphere. This vibration of the active control engine mount acts to cancel out the engine vibration during idle to reduce engine vibration and noise.

2001 ENGINE PERFORMANCE Theory & Operation

Active Control Engine Mount
Fig. 77: Identifying Typical Active Control Engine Mount Components (Avalon & Highlander 3.0L V6) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

IG2 RELAY

2001 ENGINE PERFORMANCE Theory & Operation

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Responses

  • kaj lakanen
    How to check vaccum controlled engine mount toyota avalon 2000?
    4 years ago

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