PassageMaker - March 2011

You Play, We Pay!

Own a power yacht at a fraction of the
price and without the usual expenses and
aggravations of traditional ownership

Moorings 474 PC Retail Price Charter Management Discount Sale Price Standard Down Payment Monthly Boat Payment

Guaranteed Monthly Income Operating Expenses Monthly Out of Pocket Value of Owner’s Use

$729,000

$40,000

$689,000

$172,250

$4,358

$5,000

$0

$380,000

Get on board with Moorings Ownership and Enjoy:

; Up to 12 weeks owner use
; Access to over 35 Destinations*
; Monthly Revenue Check
; No Monthly out of Pocket Costs
; Professionally Maintained
For more information on Moorings Yacht Ownership
contact our sales team at 1-800-416-1077 or email
us at buyayacht@moorings.com
www.mooringsyachtownership.com

TECHNOLOGY

Courtesy of CMD

Cummins MerCruiser Diesel’s configurable VesselView display provides vital information at the push of a button.

monitoring. Additionally, companies such as Bosch and Nippon Denso supply electronic control modules (ECMs), also known as electronic control units (ECUs), to engine manufacturers after conducting exhaustive R&D. Several of the engineers I spoke with originally worked for companies such as GM Powertrain, John Deere, and Ford and knew the process firsthand.

All confirmed that none of these electronic engines have the ability to measure actual fuel flow.

No matter if it is a Cummins, Yanmar, Scania, BMW, Lugger, Deere, or other brand, when an engine undergoes development, the engineers map the ECM by developing an algorithm that takes into account key factors such as injector temperature and cylinder pressure, and even fuel density.

While I heard essentially the same story from all companies, John Deere’s Jennifer Barrett best summed up the holy grail of this mapping program: how much fuel do we need in order to provide the necessary power for these conditions at this speed?

The ECM “commands” the injector (funny use of the word, I thought, but engineers use it in this context) to be open for the precise amount of time needed to inject the specific number of milligrams of fuel per stroke that will achieve the required power at the engine speed requested by the throttle.

During an engine’s development, the amount of fuel actually burned is precisely compared to the calculated fuel burn from the mapping algorithm, and this is checked and rechecked to make sure the resulting difference, if any, is very, very small. Some assumptions are made during the mapping process, as some variables, such as internal tolerances and fuel type and temperature (which affect fuel density), might keep the calculated