AiM LCU-One CAN for MXL QM/EVO3 QM - Manual (Page 3)

LCU-ONE CAN connected to MXL QM and EVO3 QM
User Manual
Release 1.04
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Chapter 1 – LCU–ONE
LCU-ONE
is a lambda controller unit for the 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 Pro/Pista QM (from here onwards MXL QM) and
EVO3 Pro/Pista QM
(from here onwards EVO3 QM) with lambda values through the CAN
bus.
Lambda value is defined as: LAMBDA =(A/F)/(A/F) Stoichiometric
Where:
A
= incoming part of air;
F
= parts of petrol the carburettor introduces in the engine;
A / F Stoichiometric = parts of air needed to burn Stoichiometric F;
Gasoline, for example, 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 from 0.65 to 1.6 (free air).
It is reminded that LAMBDA values lower than 1 means a rich mixture, while
LAMBDA values higher than 1 means a lean mixture.
Wide band Lambda probe 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 within the optimum working range.
During its working period, Lambda probe used with LCU-ONE controller becomes very hot
(around 700-800 °C, 1292-1472 °F); it is thereby necessary AVOIDING:
• Touching it
;
• Placing it in contact with flammable stuff or fuel
.
Please note:
disrespect of these precautions can cause shocks, burnings or explosions.
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1.1 – Part number
Kits part number are:
• Controller LCU-ONE (Complete kit with Lambda probe) X08LCU03K0
• BOSCH LSU 4.9 Lambda probe XO5LSU490
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