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MARINE DIESEL BASICS
  • Book Shop
  • Free Downloads
    • Free Manuals
      • Breathing – intake, exhaust
      • Cooling Manuals
      • Drive Train – Shaft Seals etc.
      • Electrical Manuals
      • Engine Controls, Gauges,
      • Engine Manuals
      • Fuel System Manuals
      • Propeller Manuals
      • Sail Drive Manuals
      • Transmission Manuals
    • Checklists – illustrated & free
      • Maintenance
      • Winterizing
      • Recommissioning (“summerize”)
      • Saildrives
    • Word Lists
      • Deutsch – German
      • Español – Spanish
      • Français – French
      • Italiano – Italian
      • Nederlandse – Dutch
      • Português do Brasil
      • русский – Russian
      • Svenska – Swedish
      • ไทย – Thai
      • Türkçe – Turkish
    • Puzzles
  • Learn More
    • Videos
      • How Diesels Work
      • SV Oceans Five
    • Engine Essentials
    • Maintenance
    • Diesel Fuel
    • Lubrication
    • Raw Water Cooling
    • Breathing – Air Intake & Exhaust
    • Diesel Engine Coolant/Antifreeze
      • Functions of a Marine Diesel Thermostat
    • Heat Exchanger Anode
    • Visual Learning
  • Donate
  • My Story
    • Indian Ocean Passage
0

 

Breathing – Air Intake and Exhaust

 

Why Clean the Air Filter?

Even in a “clean” marine environment, dust, sand, hair, belt dust and insulation debris can be drawn into an engine’s air intake – and, hopefully, trapped in the air filter. Keeping the air filter clean and in good repair is important to : 1)  prevent contaminants getting inside the engine where they can stick with oil and cause abrasive damage; 2) allow air to flow as easily as possible into the engine with minimal drop in pressure.

5 Types Air Intakes from Marine Diesel Basics

From page 77 Marine Diesel Basics 1

5 Types of Air Intake & Filter

 

Diesel engines consume huge volumes of air which must flow through the air intake and out through the exhaust. A typical naturally-aspirated 40hp engine draws approximately 136 cubic metres of air per hour (80 cfm) more than twice the volume of a regular shipping container. A turbocharged engine may draw twice this volume of air.

Five designs of air intake/air cleaner are in common use:

  • replaceable paper filter elements (similar to fuel filters)
  • reusable, cleanable rigid filter element
  • washable foam filter around a rigid air intake
  • intake “silencer” – contains no air filter, but dampens air intake noise
  • air intake with no filter or housing – common on older diesel engines (e. g. 1970s)
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