Z001007/0_4_September 2007
Page AIR INTAKE AND VENTILATION-3
AIR INTAKE AND VENTILATION
INSTALLATION INSTRUCTION
9. AIR INTAKE AND VENTILATION
9. 1. GENERAL
Power of the engine is influenced by a number of different factors. The most important ones are air pressure,
air temperature and exhaust gas counterpressure.
In case of large deviations from the standard values the diesel engine also loses power. This loss can even be
to such an extent that a planing boat cannot plane.
To guarantee a proper function of the engine and its full power it is vital that the supply- and exhaust air ducts
are designed large enough and functionally.
Two main demands are to be fulfilled:
1.)
Sufficient supply of air (oxygen) to the engines, in order to ensure a fuel combustion
without residues.
2.)
Ventilation of the engine compartment to keep the temperature level in the compartment low.
An adequate ventilation also improves the operating conditions for the whole eletrical equipment of the engine.
ATTENTION:
If people are in the engine compartment, the ventilation is to be adapted.
Local safety rules and legal regulations are to be followed.
1
air inlet, water separator
(effective surface: see chart)
2
air pipes (dimensions: see chart)
3
sound absorber (see section "insulation")
In the sound absorber no restriction may
occur. Inner distance between walls
= pipe diameter
4
sound-absorbing engine compartment
(see section "insulation")
5
outlet for exhaust air, with inactive engines.
For running engines air will be sucked in at
1 and 5. Cross section as for 1.
6
sound-absorbing hatches
Ill.9/1 Example for air inlet and ventilation of engine on sport boats, and similar applications.
