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Tagged: 0 Thread(s). Quoted: 0 Post(s). The Prius gas tank is fitted with an internal bladder to prevent gas fumes from leaking into the air. It does create the problem of inconsistent gasoline fill-ups. 1 - The back pressure from the tank can cause early shutoff of the nossle. (don't overfill as gasoline can spurt out due to bladder pressure). 2 - In cold weather, the bladder gets stiff reducing the effective tank capacity. As was stated before the nominal tank capacity is 11.9 gallons.
With both the gas engine and electric motor, the Prius has a combined horsepower of 110. The gasoline engine is linked to the drive wheels and a generator directly via a unique transmission and, whenever it's running, it can also drive a generator that helps keep the battery charged.