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
AUTOMOTIVE
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
