Woodward 2301E, Инструкция по установке и эксплуатации, Страница: 109 / 182

Manual 26641 2301E Digital Control
Woodward 99
03 SOFT START FUEL LIMIT ON dflt = FALSE (FALSE, TRUE)
When set TRUE enables a ramp to the start fuel limit. When the engine is started
and MPU is sensed, the fuel demand ramps from zero at the “Start Ramp Rate
(%FD/S), until the start fuel limit is reached. The fuel demand will stop ramping
until the speed reaches 95% of the speed reference, at which time the PID will
take control. This option is usually used with slow speed natural gas engines.
This feature allows the manifold air pressure time to build, while waiting on the
turbo to build enough air pressure.
SPEED
GREATER
THEN
5% OF
RATED
MAX
FUEL
LIMIT
START
FUEL
LIMIT
START
RAMP
(%/
SEC)
SPEED
EQUALS
SPEED
REFERENCE
TIME
0
100
SOFT START FUNCTION
Figure 4-10. Soft Start Fuel Limit Function
04 MAX FUEL LIMIT (%FD) dflt = 100.00 (50.00
–110.00)
Sets the maximum percent fuel demand. Maximum (100%) is based on 200 mA.
This is an electronic rack stop which is active in all modes of operation.
05 ENABLE IDLE LIMITER ? dflt = FALSE (FALSE, TRUE)
Set to TRUE to enable the Idle Fuel Limiter . Set to FALSE to disable the Idle
Fuel Limiter. This option, when enabled, will limit the Fuel Demand at a fixed
value [06 IDLE FUEL LIMITER (%fd)], only while the Idle / Rated contact is in the
Idle position. This feature can be used to limit fuel on natural gas engines, so that
the engine is not flooded on start-up.
06 IDLE FUEL LIMITER (%FD)
dflt = 100.00 (0.00
–100.00)
Sets the maximum percent fuel demand when the Idle / Rated Contact is in the
Idle position. Maximum (100%) is based on 200 Ma.
07 ENABLE TORQUE LIMITER ?
dflt = FALSE (FALSE, TRUE)
Set to TRUE to enable the TORQ LIMIT CURVE. Set to FALSE to disable the
TORQUE LIMIT CURVE.
08 MIN SPEED TORQUE LIMIT dflt = 300.00 (0.00
–4000.00)
This sets the first breakpoint of the TLC. It should be adjusted to the rpm which
represents the first breakpoint. Typically this is set at minimum speed. The limit
on fuel demand below this point is extrapolated from this point and the SPEED
BRKPOINT TORQ LIM
below.
09 TORQUE LIMIT MIN SPEED dflt = 100.00 (0.00
–100.00)
This sets the maximum fuel demand at the minimum speed setpoint.