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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 347 (Hybrid/EV Control System) >> Description and Operation >> Hybrid Modes of Operation Description >> Engine Starting

Engine Starting

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.

This vehicle does not use a 12 V starter motor to crank the internal combustion engine. A much more powerful 300 V motor/generator located within the transmission is utilized to crank the engine. The 300 V drive motor generator can rotate the engine to operating speed (800 RPM) within just a few hundred milliseconds. The 300 V drive motor generator allows near-instant starting of the engine. Once started, engine operation may cycle between Autostop (engine off) and Autostart (engine running) for the duration of the drive trip.

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