LCU-ONE Analog
User Manual
Release 1.02
0
Chapter 1 – LCU-ONE Description
LCU-ONE
is a lambda controller unit for wide band BOSCH LSU 4.9 lambda probe; it
fits petrol (2 and 4 strokes), diesel and methane engines as well as alcohol based fuel
engines. It is intended to check lambda probe proper working as well as to transmit the
Air/fuel ratio values providing
MXL/EVO3
with lambda values through the CAN bus.
Lambda value is defined as:
LAMBDA= (A/F)/(A Stoichiometric /F Stoichiometric)
.
where:
A
= incoming parts of air;
F
= parts of petrol the carburetor injects into the engine;
A Stoichiometric / F Stoichiometric
= parts of air needed to burn Stoichiometric F;
Speaking about gasoline, for example, it needs 14,57 parts of air to completely burn a
part of gasoline, obtaining Lambda value = 1 read by the probe.
LCU-ONE
controller can detect lambda values in a range of 0.65 to 1.6 (free air).
It is reminded that LAMBDA value lower than 1 means a rich mixture, while
LAMBDA value higher than 1 means a lean mixture.
Wide band Lambda probes need to be heated to work properly and not poisoned with
exhaust gas;
LCU-ONE
controller precisely manages the probe heater so to keep
temperature value in the optimum working range.
Lambda probe used with LCU-ONE controller becomes very hot (around 700-800
°C, 1292-1472 °F) during its working period, it is thereby necessary
AVOIDING
:
•
touching
it.
•
placing it in contact with flammable stuff or fuel.
Please note:
disrespect of these warnings can cause shocks, burnings or explosions.
www.aim-sportline.com
2
