Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 164
12.2 Ether Cold Start Systems
12.2.1 Ether start Operation
The ether solenoid control is available to drive a relay and/or solenoid to
control ether delivery to the intake manifold. The ECM controls the ECM
output when conditions dictate the use of an Ether starting aid. Perkins offers
an optional ether start system matched to each engine’s particular cold start
strategy. Please refer to your Applications engineering department for more
information.
The ether control strategy establishes ether injection durations based on
maps configured for temperature and altitude. These values are fixed and are
not configurable by the customer. As an example if the ambient temperature
is below -25°C at sea level and an attempt is made to start the engine, the
ether solenoid control will be enabled until the engine reaches 50rpm less
than low idle. If the engine starts or a condition occurs that prevents fuel from
being injected, the ether solenoid control will be disabled.
Ether will only be injected while the engine speed is greater than zero. Ether
will not be injected prior to cranking the engine.
12.2.2 Ether start Configuration
To activate the ether start strategy within the engine ECM the option must be
selected using Perkins EST. This is achieved by double clicking the Ether
start option displayed as part of the main configuration screen and selecting
the ‘Installed’ option.
12.2.3 Ether start Installation
The continuous flow ether system is available as an optional attachment. The
component in the ether system that controls ether quantity and spray angle is
the atomizer. The atomizer has a control orifice that is sized for a specific
range of intake air flow. Be sure to order the correct ether system to match
the engine.
NOTE: Ether atomizer location is critical to proper operation of each model’s
cold start strategy. For proper ether atomizer location, specific to each engine
model, consult with your Applications Engineer.
The ECM is capable of directly controlling and activating the ether control
valve solenoid as long as the parts used require no more than 2Amps. All
Perkins parts are verified to ensure that they meet this requirement. An
example of the Ether control solenoid is shown in figure 12.5.