Monaco SIGNATURE 2001 series, Руководство пользователя

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The "Jake" brake is an engine brake which uses the energy of the engines
compression to slow down the motorhome. The engine brake efficiency
increases with engine speed; therefore, gear selection is important. The "World"
Allison transmission will automatically select the best downshift gear upon actua-
tion of the foot switch for the Jake Brake.
The engine brake uses a hydraulic circuit that opens the exhaust valves near the
end of the compression stroke. The amount of braking power depends on tur-
bocharger boost pressure, engine speed, compression ratio, injector timing and
when the brakes open the exhaust valves.
Engine brake controls with the fuel system consist of the following:
1. A two-position selector switch.
2. An ON/OFF switch, which is the foot switch.
3. A throttle sensor.
Other switches for cruise control which affect engine brake operations are:
1. Cruise control ON/OFF and SET/RESUME switches (if the Engine Brakes in
Cruise Control feature is turned “OFF”).
2. Service brake air pressure switch (if pedal activated engine braking is
enabled).
The two-position selector switch, located on the driver’s left console, allows you
to select the retarding power of one or two brakes.
“LOW” activates the engine brake on three cylinders.
“HI” activates the engine brake on six cylinders.
The engine ECM then electronically enables or disables the engine brakes.
Engine brakes cannot be enabled:
1. When the cruise control is active and if the engine brakes in cruise control fea-
ture is turned OFF.
2. When engine speed goes below 850 rpm.
3. When an electronic fault code is active. The throttle sensor is part of the accel-
erator pedal assembly located in the cab and will deactivate the engine brakes
when depressed. The service brake pressure switch is attached to the service
brake air supply line. Applying the service brakes while in cruise control will
disengage the cruise and enable the engine brakes. The Jake Brake can be
used continuously down a hill, or a long freeway off ramp. The engine brak-
ing system will allow the engine temperature to drop while going downhill.
NOTE: Idle the engine 3 to 5 minutes at approximately 1000 rpm to warm the
engine before activating the engine brakes. Do not operate the engine brakes
until the engine oil temperature is above 30 degrees C (86 degrees F).
WARNING: The engine brakes (Jake Brake) are designed to assist the
motorhome.
Chassis Information
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S I G N A T U R E 1 0 • 2 9 0
BRAKE - ENGINE