TDI T100-V Installation And Operating Manual - Tdi T
TDI T
URBO
T
WIN
™
FROM
TECH DEVELOPMENT
Publication T1-721, Rev. 3
Page 5
Issued April 15, 2006
incorporate a pressure relief valve set below 600 PSIG
(42 BAR) in the supply air line.
NOTE
For maximum life of the starter pinion and for the
protection of the engine ring gear, limit the operating
pressure to that necessary to start the engine at its most
difficult starting conditions.
All appropriate local pressure codes and pressure
limitations on other system components must be
adhered to and supersede the guidelines given in this
manual.
Consult your TDI distributor if you have exhaust
plumbing that creates back pressure and reduces starter
performance. You may be able to increase the supply
pressure to restore the lost power.
Follow the engine manufacturer’s instructions for starting
the engine.
CAUTION
The grease used in the planetary system has a shelf life
of 2 years. Therefore, if the starter is NOT installed and
operated on the engine for 2 years after the starter is
manufactured, the grease should be replaced prior to
starter operation. The manufactured date is reflected in
the starter serial number. (Ex: 0602-0567 has a
manufactured date of February 2006).
4.1 BASIC OPERATION
The basic operation of the starter follows:
Pressurized air or natural gas is admitted to the starter’s
engagement piston chamber via the “in” control port by
opening the manual or solenoid valve. The air then
translates the starter’s piston forward allowing the pinion
to engage the engine’s ring gear.
The forward movement of the piston causes the starter’s
“out” control port to open. Air is then transmitted to the
automatic pilot port (APP) on the relay valve causing the
relay valve to open.
Pressurized air or natural gas is admitted to the starter’s
turbine assembly by the opening of the relay valve. The
air expands through the turbine which produces shaft
rotation and torque. The starter motor torque causes the
engine to accelerate. The fuel and ignition systems now
fire the engine. Closing the relay valve stops the starter.
The operator may decrease starter life by the continual
operation of the starter after the engine has started.
Upon a successful engine start, turn the air off to the
starter immediately. Minimizing the time the starter is
operating unloaded (i.e. the engine is running) will
maximize starter life. If a start is aborted, a restart may
be attempted after the engine and the starter has come
to rest.
CAUTION
Do not engage the starter while the engine is running.
The drive air pressure is the primary starter control
parameter.
It is important, especially on new
installations, to measure this pressure during several
engine starts. The secondary parameter is the starter
pinion speed. This speed is usually measured by
knowledge of the engine starting speed and the starter
cranking ratio. The cranking ratio is the number of ring
gear teeth divided by the number of pinion teeth. The
starter pinion speed is then found by multiplying the
engine speed by the cranking ratio. The pinion speed is
usually 2000-3500 rpm at typical engine starting speed.
4.2 AUTOMATED START PANEL
The starter drive pressure measured at the starter inlet
will need to be set. As noted above, for maximum life of
the starter pinion and for the protection of the engine ring
gear, limit the operating pressure to that necessary to
start the engine at its most difficult starting conditions.
The speed control parameter will then need to be set.
Engine starting speed along with the cranking ratio
number can be used to determine starter pinion speed.
The pinion speed is usually 2000-3500 rpm for a typical
engine starting speed. Once the start sequence has
begun, the air is admitted to the starter. The starter
begins to accelerate the engine. Once the firing speed of
the engine is reached, the automated start panel may
deliver fuel to the engine. The engine will begin to
accelerate under its own power. The starter should be
dropped out of the sequence at a rpm higher than the
firing speed, but less than the engine idle speed.
The automated start panel should monitor engine speed
to determine air on and air off. Do not simply use time
as a control parameter. Avoiding excessive operation of
the starter after the engine is firing will maximize the
starter life.