automotive engines part 5 (induction). induction the term “induction” applies to the pathway for...
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![Page 1: Automotive Engines Part 5 (Induction). Induction The term “induction” applies to the pathway for fuel and air to enter the combustion chamber. Including:](https://reader037.vdocuments.net/reader037/viewer/2022110322/56649d0b5503460f949de7e2/html5/thumbnails/1.jpg)
Automotive Engines
Part 5 (Induction)
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Induction
The term “induction” applies to the pathway for fuel and air to enter the combustion chamber.
Including:– Carburetion– Fuel Injection– Manifolds
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Carburetors
Rely on the Venturi Vacuum principle Rated in CFM 3 Common Styles
– 1 Barrel– 2 Barrel– 4 Barrel (square bore/spread bore)
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Venturi Vacuum
float bowl
fuel
atmosphericpressure
ventfuel
nozzle
venturi
vacuum
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1 Barrel (200 – 400 CFM)
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2 Barrel (350 – 500 CFM)
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4 Barrel (400 – 1150 CFM)
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Square Bore Vs. Spread Bore
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Fuel Injection
Fuel injection atomizes the fuel by forcibly pumping it through a small nozzle under high pressure (15-90 psi).– Throttle Body Injection– Port Fuel Injection
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Throttle Body Injection
1 or 2 Injectors for engine
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Port Fuel Injection
An injector per cylinder aimed at the port opening.
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Typical Injector
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Intake Manifold
“Wet” for Carbureted applications “Dry” for Injected applications Older manifolds were made from Cast Iron Modern manifolds are made from Aluminum Future manifolds will almost always be made
of plastic (vinyl, phenolic resin, etc.)
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Carbureted Intake Manifold
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Injected Intake Manifold
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