Engine Indicating - Cirrus SR22 Pilot Operating Handbook

S 7: A
ECTION IRPLANE AND
E
NGINE
Power (Throttle) Lever
The single-lever throttle control, labeled MAX-POWER-IDLE, on the
console adjusts the engine throttle setting in addition to automatically
adjusting propeller speed. The lever is mechanically linked by cables to the
air throttle body/fuel-metering valve and to the propeller governor.
Moving the lever towards MAX opens the air throttle butterfly and meters
more fuel to the fuel manifold. A separate cable to the propeller governor
adjusts the governor oil pressure to increase propeller pitch to maintain
engine RPM. The system is set to maintain approximately 2500 RPM
throughout the cruise power settings and 2700 RPM at full power.
Mixture Control
The mixture control lever, labeled RICH-MIXTURE-CUTOFF, on the
console adjusts the proportion of fuel to air for combustion. The Mixture
Control Lever is mechanically linked to the mixture control valve in the
engine-driven fuel pump. Moving the lever forward (towards RICH) repo-
sitions the valve allowing greater proportions of fuel and moving the lever
aft (towards CUTOFF) reduces (leans) the proportion of fuel. The full aft
position (CUTOFF) closes the control valve.
Alternate Air Control
An Alternate Induction Air Control knob, labeled ALT AIR – PULL, is
installed on the left console near the pilot's right knee.To operate the
control, depress the center lock button, pull the knob to the open position,
and then release the lock button. Pulling the knob opens the alternate air
induction door on the engine induction air manifold, bypasses the air filter,
and allows warm unfiltered air to enter the engine. Alternate induction air
should be used if blocking of the normal air source is suspected. Operation
using alternate induction air should be minimized and the cause of filter
blocking corrected as soon as practical.

Engine Indicating

Engine information is displayed as analog-style gauges, bar graphs, and text
on the MFD's ENGINE page. When the ENGINE page is not active or in
the case of an electronic display failure (backup mode), all essential engine
information is displayed along the LH edge of the display. Engine data is
acquired by the Engine Airframe Unit which transmits the data to the
Engine Indicating System for display as described in the following pages.
A "Red X" through any electronic display field indicates the field
is not receiving valid data and is considered inoperative.
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S
YSTEMS
• N •
OTE
C D
IRRUS ESIGN
SR22
P/N 13772-006
Reissue A