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The inherent advantage of autogas over CNG is that it requires far less compression (20% of CNG cost), [21] is denser and easier to store as at this lower pressure it is a liquid at room temperature, and thus requires far cheaper tanks (consumer) and fuel compressors (provider) than CNG.
The system increases the engine's power output by allowing fuel to be burned at a higher-than-normal rate, because of the higher partial pressure of oxygen injected with the fuel mixture. [1] Nitrous injection systems may be "dry", where the nitrous oxide is injected separately from fuel, or "wet" in which additional fuel is carried into the ...
Therefore, depending on how the fuel is metered, the maximum output for a hydrogen engine can be either 15% higher or 15% less than that of gasoline if a stoichiometric air/fuel ratio is used. However, at a stoichiometric air/fuel ratio, the combustion temperature is very high and as a result it will form a large amount of nitrogen oxides ( NO ...
Thus it is more sustainable than electric cars. For example, there is much less use of metals, or toxic battery chemistries. A centralized manufacturing and electric grid might be less necessary. Efficiency is also helped by the low weight of composite pressure vessels relative to steel tanks or lithium-ion batteries. [6]
These engines gave good performance and had up to 30% less fuel consumption over the carburetor version, primarily under low engine loads. [44] An added benefit of the system was having a separate tank for the engine oil which was automatically added to the fuel mixture, obviating the need for owners to mix their own two-stroke fuel blend. [45]
In Brazil, 65% of flex-fuel car owners were using ethanol fuel regularly in 2009, [25] while, the actual number of American FFVs being run on E85 is much lower; surveys conducted in the U.S. have found that 68% of American flex-fuel car owners were not aware they owned an E85 flex. [18] US E85FlexFuel Chevrolet Impala LT 2009
Since, 2003, when the subsidies disappeared, the number of cars running on LPG has decreased and the number of cars running on diesel has increased. This was partly due to the tax incentives to purchase diesel cars. In recent years, the use of autogas as a vehicle fuel has accounted for less than 2% of vehicle fuel use in Belgium.
Example energy flows for a late-model (pre-2009) midsize passenger car: (a) urban driving; (b) highway driving. Source: U.S. Department of Energy [4] [5] Most of the fuel energy loss in cars occurs in the thermodynamic losses of the engine. Specifically, for driving at an average of 60 kilometres per hour (37 mph), approximately 33% of the ...