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4 stroke
- Intake
- Compression
- Compbustion
- Exhaust
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2 stroke
- Intake and Compression
- Combustion and Exhaust
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Diesel
- Combustion uses heat of compression not spark
- 2 or 4 stroke
- water cooled
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Diesel Fuel v Gas
- FP 130
- Gas FP -32
- Cheaper, safer, less pollution, more energy per gallon
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KFD Diesel Engines
- Quantum - 60 series 4 stroke
- 727- 8V92TA 2 stroke
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60 Series
- Detroit Diesel
- straight 6
- 470 HP
- Computer controlled
- Turbo
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8V92TA
- Detroit Diesel
- 2 stroke
- 475 HP
- V 8
- Turbo
- Computer controlled (can not change performace)
-
Turbo Chargers
- Essential for 2 stroke engines
- Creates compressed air used for combustion
- Increases HP without increasing weight
- Turbo fins can not opperate with water or debris
- Beaings need oil supply (high or No RPM is bad)
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Jake Brake (engine brake)
- Runs off of the cylinders compression to slow engine
- Switches off when accelerator is pressed
-
Jake Brake Quantum
- 2 switch:
- On/Off
- 6, 4, 2, off
-
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Fuel Air mixture differences
- Gas: Air and Fuel mix is compressed, can cause knocking if over compressed. Less efficient
- Diesel: Only air is compressed, so can have higher compression ratio (power)
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ECM and starting
ECM controls all functions no amount of pumping the gas will help an engine that won't start
-
Glow plugs
- These larger engines do not need them becuase of the high compression of the larger cylinders.
- Block heaters are used
-
Jake Brake
Uses the energy of compressed cylinder to slow the engine by opening the exhaust valve at top of compression stroke
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Transmission retarder
Slows the vehicle down by pushing transmission fluid.
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Transmission Features
- Transmission Retarder
- Downshift inhibitor- prevents if too high RPM
- Automatatic Neutral selection- Goes to N when battery off
- Hold-in-gear feature- stays in gear of problem, neutral after shut down.
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