AiM LCU-2 analog

The LCU-2 analog lambda measurement system was primarily developed for use in connection with devices or ECUs from other manufacturers. LCU-2 can also be used on engines that are not operated with gasoline, but with methanol, gas, diesel, etc., because RaceStudio2 also allows the Lambda 1 parameters to be changed.

 LCU-2 is a control unit for the BOSCH LSU 4.9 broadband lambda probe. Its task is to control and monitor the correct function of the lambda probe and its heating and to output the lambda value determined from the residual oxygen content of the exhaust gas in analog form.

 The optimal air-fuel ratio (AFR) for Otto engines, the so-called stoichiometric ratio, is approx. 14.7. This means that if 1 kg of gasoline is mixed homogeneously with 14.7 kg of air (approx. 11 m³), its combustion results in the fewest pollutants in the exhaust gas, because the chemical connection of the carbon-hydrogen molecules (HC) available in it with the corresponding oxygen molecules (O2) fits the air perfectly. One speaks of a lambda = 1 mixture. If AFR> 14.7 one speaks of a lean mixture and if it is less than 14.7, of a rich mixture. In gasoline engines, an AFR value between 12.8 and 13.4, i.e. lambda 0.88 and lambda 0.92, is aimed for at full load, not only because it achieves the highest output, but also to protect it from overheating. LCU-2 measures the lambda value in the exhaust gas between 0.65 and pure air.

 The lambda value is output via the configurable 0 - 5 V analog output of the controller and can be recorded or recorded by any corresponding device (e.g. Drack, Evo3, MyChron 3 extreme, plus Auto / Moto, gold Auto / Moto, XG, XG-Log etc.) . are displayed.