Chapter 1 - Review Questions Flashcards
What is a diesel engine?
An internal combustion engine that uses the heat of compression to ignite a fuel charge (no mechanical ignition components like spark plugs, coils, etc. needed for ignition)
List 5 reasons why diesel engines are more efficient than gasoline engines.
- The method of supplying fuel to the combustion chamber
- The high compression ratio used in diesel engines
- The method of igniting the fuel in the combustion chamber
- The grade and type of fuel used
- The greater integral strength of diesel engine components
In a diesel engine, the ______ is not mixed with air prior to entering the combustion chamber.
Liquid diesel fuel
In a diesel engine, speed in controlled by regulating the amount of _____ delivered to the cylinders.
Fuel
There is always a(n) _____ of combustion air in the diesel engine.
Excess
What is the function of the governor in a diesel engine?
To sense engine speed and load, and then change fuel delivery accordingly
Diesel fuel contains more _____ than gasoline.
Heat energy (BTUs or joules)
What problems are associated with diesel fuel at both low temps and at very high temps?
At lower temperatures, wax in diesel fuel begins to solidify into crystals that can block fuel flow through filters, lines, and injectors which can lead to fuel starvation and/or no start conditions.
At high temperatures (above 100 degrees F), the fuel can be thinned out and reduce power output.
At very high temperatures (above 150 degrees F), the fuel loses much of its lubricating ability and can damage the injectors and other parts of the engine.
Who was the first engineer to develop a compact, reliable diesel fuel injection pump?
Robert Bosch.
Rudolf Diesel never lived to see his engine fully appreciated or used to its potential
Define the terms ‘mobile’and ‘stationary’ as they pertain to diesel engine applications.
Mobile -
Stationary -
