Dongfeng 3615010-T68H3 Aftertreatment Control Unit Assembly

The 3615010-T68H3 is an electronic dosing control unit (DCU) designed for the selective catalytic reduction (SCR) aftertreatment system on China IV emission standard heavy-duty trucks. It controls urea injection dosing based on NOx sensor feedback and exhaust temperature signals via CAN bus communication (J1939 protocol). The unit integrates the control logic for the urea pump, dosing valve, and heating circuits to maintain optimal NOx conversion efficiency. It is calibrated for Cummins ISLe series engines equipped with CM1880 or similar aftertreatment architectures. The aluminum housing provides EMI shielding and environmental protection for the internal PCB assembly. This assembly serves as a direct replacement for the OEM DCU on Dongfeng Tianlong models.