Have a Carburetor? Try Fuel Atomization
Back in the days when carburetors were used to feed gasoline into the engine, there were a couple of tricks that could improve fuel economy a bit, especially when the engine was cold. One was a simple honeycomb spacer that fit under the carburetor. The turbulence created by the honeycomb helped break up the fuel a bit. Another was an ultrasonic vibrator that mounted under the carburetor. The vibrator also improved fuel atomization slightly — but only provided a marginal benefit when the engine was cold.
Some engines from that period used an electrically heated grid under the carburetor to improve fuel atomization following a cold start. But like the other devices, the benefit disappeared once the engine reached normal operating temperature.
Today’s fuel injected engines atomize the fuel when they spray the fuel into the engine. They don’t need intake manifold heaters or other such devices. The most efficient designs are the new high pressure “direct injection” systems that VW uses on some of its engines.
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