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In various industries, diesel engines continue to be indispensable due to their exceptional fuel efficiency and torque characteristics, all while meeting stringent emissions standards through advanced aftertreatment technologies like Diesel Oxidation Catalysts (DOC), Diesel Particulate Filters (DPF), and Selective Catalytic Reduction (SCR). The critical role of hydrocarbon dosing in Diesel Oxidation Catalysts (DOC) lies in effectively reducing emissions such as hydrocarbons, carbon monoxide, and soluble organic fractions in particulate matter, converting them into H ₂ O and CO ₂ . However, traditional DOC control strategies often struggle to adapt to the dynamic nature of diesel engine operation, resulting in temperature overshoots during transient engine conditions. To address this challenge, an approach is proposed that utilizes Long Short-Term Memory (LSTM) networks within a Federated Learning (FL …