Vehicle Air Intake Systems

Wear in vehicle diesel engines is caused by contamination entering the air and lubrication systems. Studies indicate that the most damaging particles are in the size range of 1 to 10 micron, ref 1 and 2.

Fine filtration increases system reliability and reduces the number of component failures due to contamination. For details on filtration solutions for vehicle air intake systems, contact your local Pall sales representative at

Problems Caused by Contamination

Sand and dust contamination can cause:
  • Turbocharger wear
  • Compressor wear
  • Bearing wear
  • Damage to air system components
  • Heavily contaminated oil
  • Damage to valves, piston rings, and cylinder liners
This leads to loss of power/torque reduction and ultimately, engine failure

  Aerospace, Defense, and Marine OverviewAerospace ProductsApplications
Air Systems
CBRN Protection
Cabin Air
Engine Protection - Helicopters
Engine Protection - Vehicles
Other Air Systems
Fluid Recycling
Fuel Systems
Hydraulic Systems
Lubrication Systems
Water Treatment/Desalination

Benefits of Fine Filtration

Fine filtration prevents harmful contaminants from entering the air intake system, and this will:
  • Protect the engine by removing harmful solid and liquid contamination
  • Increase engine MTBUR for erosion, reduce component wear
  • Reduce unscheduled engine removals
  • Increase vehicle availability
  • Reduce the cost of component repairs
  • Reduce the logistics burden

Typical Filter Locations

Vehicle air intakes require a filtration system to protect the diesel engine from damaging particulate contamination. This type of system is installed upstream of the engine air intake, and is either engine-mounted or hull-mounted

The filter assemblies are connected to the engine via a duct

The engine air filtration components (PUREair pre-cleaner and barrier filter) are in part of the engine.


Filter Solutions

Pall's engine air filtration system consists of a PUREair pre-cleaner combined with a barrier filter downstream.
PUREair is a "fit and forget" system that is virtually maintenance-free. It has no moving parts and operates at a constant low differential pressure

The barrier filter media exhibits particle removal efficiencies of >99.999% removal (ISO Fine Test Dust)

If you have a specific application, contact your local Pall sales representative at

Technical Papers/Field Studies

1 Needleman, W. and Madhavan, P. "Review of Lubricant Contamination and Diesel Engine Wear," SAE Technical Paper 881827, 1988.

2 Jaroszczyk, T. Wake, J. and Connor, M.J " Factors Affecting the Performance of Engine Air Filters," Journal of Engineering for Gas Turbines and Power, Volume 115, October 1993, pp. 693-699.

Madhavan, P, Bauer, C. (2006) "Filtration and Separation Solutions for Improving the Reliability and Safety of Armored Vehicles", National Conference on Technologies for Light Armoured Fighting Vehicles, Ahamednagar, India