EngineEngine
Cirrus SR22
12/23/03
GeneralGeneral
• Powered by a Teledyne Continental IO-550-N engine– Six cylinder– Normally aspirated– Fuel injected– 310 horsepower @ 2700 RPM– 2000 hour Time Between Overhaul (TBO)
• Dual magneto ignition system
GeneralGeneral
• Attached to airframe by a six-point steel mount structure attached to firewall
• Firewall attach points are reinforced with gusset-type attachments that transfer forces into fuselage shell
Oil SystemOil System
• Provides engine cooling, cleaning, and lubrication
• Delivers hydraulic pressure to governor which regulates propeller pitch
• Wet sump, high pressure system
• 8 quart capacity
Oil SystemOil System
• Components– Oil Pump
• Positive displacement pump located within engine case
– Oil Cooler• Incorporates a bypass valve
which isolates the cooler when the oil temperature is less than 180°F
– Oil Filter– Sump (Oil Pan)
• 8 quart capacity
Oil SystemOil System
• Engine should be operated with between 6 and 8 quarts of oil
• Oil and oil filter should be changed every 50 hours after engine break-in
• See section 8 of POH for approved and correct grades of oil
Oil SystemOil System
• Abnormal Conditions– Oil annunciator will illuminate if:
• Oil temperature exceeds 240°F
• Oil pressure is less than 10 PSI
OIL
Cooling SystemCooling System
• Accomplished through the combined effort of the oil system and air cooling
• Oil System – Air passes over the oil cooler drawing heat away from the oil returned to the engine
• Air Cooling – Baffels in the engine cowl direct outside air down through the cylinders and out the underside of the cowl
Air Induction SystemAir Induction System
• Air passes through a dry-foam air filter, through the throttle butterfly valve, into the engine manifold, and then into the cylinder combustion chambers
• Alternate Air– Use if main induction
becomes clogged– Pilot will note loss of engine
power and/or roughness– Source is inside cowl– Unfiltered air
Ignition SystemIgnition System
• Dual ignition system– 2 spark plugs per cylinder
• Two engine driven magnetos provide electricity for spark– Right Magneto
• Lower Right and Upper Left Spark Plugs
– Left Magneto• Upper Right and Lower
Left Spark Plugs
Exhaust SystemExhaust System
• Exhaust manifold connects each cylinder to the muffler
• Two mufflers, left and right
• Exhaust gasses vented at the underside of the engine cowl
• Heat exchanger on right muffler provides cabin heat
Engine ControlsEngine Controls
• Power Lever– Single lever that controls both
throttle position and propeller governor position
• Throttle– Controls amount of air
metered to cylinders from the throttle valve
• Mixture– Controls mixture control valve
located in the engine driven fuel pump
• Start/Ignition - allows selection of independent magnetos, both magnetos, and starter engagement
• Alternate Air – allows selection of alternate induction air. Located in the pilots foot well to the left
IndicatingIndicating
• Oil Warning Light• Tachometer• Oil Temperature• Oil Pressure• Exhaust Gas
Temperature• Cylinder Head
Temperature• Fuel Flow • Manifold Pressure