Fuel Systems Flashcards
What diesel fuel is recommended for cold weather
No. 1
What is the recommended fuel viscosity for diesel engines
39(SSU)
What is Diesel fuel cloud point
The temp that wax crystals separate and cause clogs
What pressure does Diesel direct injection operate at
Up to 30,000 PSI
What does a governor do in a fuel system
Senses engine speed and load, adjusting fuel accordingly
What are the 6 types of governors
-mechanical
-pneumatic
- servo
-hydraulic
-electric
-electronic
What authority grades diesel fuel
ASTM
American society for testing and materials
What are the two grades of diesel fuel
No. 1d
No. 2d
What does a EGR system do
Allows burned gasses back into the intake manifold to reduce oxides of nitrogen
What happens when EGR gasses are added to the fuel air mix
Peak combustion temp is decreased
How does a EGR valve operate
Under heavy engine load the EGR valve is opened by vacuum allowing exhaust into the intake manifold
What is the ideal fuel to air ratio for gas engines
14.7:1
What are the 4 main subsystems of the electronic fuel injection system
-fuel delivery
-air induction
-sensors
-computer control
What is a EFI fuel delivery system comprised of?
-electric fuel pump
-filter
-pressure regulator
-injector valve
Lines
How is an EFI injector powered
Solenoid
