INTAKE and EXHAUST SYSTEMS

INTAKE and EXHAUST SYSTEMS

• Chapter7

• Classroom Manual

• Page 199

CBCAUTOMOTIVE

OBJECTIVESOBJECTIVES

• Explain the function of the intake manifold.

• Explain the function of the exhaust manifold.

• Describe different type of air cleaners

• Explain purpose of heated air inlet system

• Explain purpose of electrically heat grid

• Describe operation of heat riser valve

• Explain Catalytic Converter OperationCBC

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INTRODUCTIONINTRODUCTION

• Proper combustion requires the engine to “breathe” properly.

• Intake & Exhaust manifolds & Valve train must all work together.

• Determine normal & Abnormal operation of Intake and Exhaust systems

• Auxiliary air preheat systems must function properly. CBC

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MANIFOLDSMANIFOLDS

• Intake• Materials

– Cast Iron

– Aluminum

– Plastic

• Manifold Types– Single Plane

– Dual Plane

• Runner Design

• Exhaust• Materials

– Cast Iron

– Steel Tubing

– Stainless Steel Tubing

• Manifold Types– Factory cast

– Tube Headers

• Runner Design CBCAUTO

INTAKE MANIFOLDINTAKE MANIFOLD

• Prevents condensation and assists in vaporization of air fuel mixture

• Runners are Level

• Equal runner length and cross section.

• Wet or Dry

• Inlet temp 100

• Exhaust crossover passageCBC

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DUAL PLANEDUAL PLANE

CBCAUTOMOTIVE

BI-METAL SENSORBI-METAL SENSOR

CBCAUTOMOTIVE

EXHAUST MANIFOLDEXHAUST MANIFOLD

• Made of cast iron, nodular iron, stainless steel or heavy gauge steel.

• Engineered for size, flow, silencing.

• A restriction of exhaust gas flow can result in excessive backpressure.

• Proper tuning of the exhaust manifold (headers) creates a vacuum that assists in air/fuel mixture induction into the cylinder.

CBCAUTOMOTIVEPage 292L

EXHAUST MANIFOLD SERVICE

• New Manifolds installed with no gasket

• Don’t remove when hot

• Torque correctly• Use special heat

resistance fasteners

Fig 7-27L

ELECTRIC CATALYTIC CONVERTER

• In development• Found this on the

internet

EXHAUST PIPE

• Made from Stainless steel, zinc-plated• Double wall construction prevents “ringing”• Sealing by:

– Steel composition Gasket/Washer

– Ball Shaped flange against exhaust manifold flange

• Fit of Pipe to Muffler or Converter should be at least 1 1/2 inches.

THE END