512556

Navman Diesel Fuel Flow Sensors Manual

19
Zoom out
Zoom in
Previous page
1/39
Next page
Diesel fuel flow sensor kit Installation and Operation Manual
19
NAVMAN
Most engine manufacturers publish graphs
of the specific fuel consumption for their
engines.
Specific fuel consumption is a graph showing
how much fuel the engine burns to produce
one horsepower (or kW) for one hour. Each
engine has a particular RPM range where it
burns the least amount of fuel to produce one
unit of power. Some engines are designed to
work most efficiently at high RPM, others at low
RPM. Modern lightweight diesels commonly
have a most economical and efficient speed
of operation at around 70 to 80% of maximum
rated RPM.
The specific fuel consumption curve is worked
out for the engine working at its rated load,
at the RPM settings along the bottom of the
graph.
As you can see from the discussion on engine
and propeller curves (see section 5-1), the only
point where the engine is working at its rated
load should be at maximum RPM. At any speed
less than the maximum RPM, the engine is not
working to its maximum, and often well below
its maximum. So the specific fuel consumption
curve is of limited use to get overall boat fuel
consumption. It will give you an indication of
whether your engine has been designed for
high or low speed efficiency.
Sometimes a manufacturer will also give a
curve of fuel consumption for that engine when
matched to the theoretical ideal propeller. This
will give you a reasonable estimate of the fuel
consumption of your engine, provided you have
a well chosen propeller. It will not, of course,
take into account different loads carried or sea
state, or any other factor that affects the actual
fuel consumption.
One rule of thumb you can use to estimate fuel
is that a modern, large, high efficiency diesel,
when averaged out over most of its operating
range, will produce 23hp for one hour from one
US gallon of fuel (3.33 kW for one hour out of 1
litre of fuel). That is quite a good engine.
Smaller, older, less efficient engines might sink
as low as only 19 horsepower for one hour from
one US gallon of fuel (3.11 kW for one hour
from 1 litre of fuel)
Over all the engines available in the pleasure
craft market there is very little difference in
the fuel burning rate, when averaged out over
their normal working range. Some engines
will have an optimum at lower revs, others at
higher revs.
The important thing to remember is that the
quantity of fuel you actually use is determined
by your propeller and hull much more than by
your particular choice of engine.
5-2 Specific fuel consumption curve
… 19 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Navman Diesel Fuel Flow Sensors at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Navman Diesel Fuel Flow Sensors in the language / languages: English as an attachment in your email.

The manual is 0,34 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Navman Diesel Fuel Flow Sensors

Navman Diesel Fuel Flow Sensors User Manual - German - 34 pages

Navman Diesel Fuel Flow Sensors User Manual - Dutch - 32 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info