Integrated device, exhaust-gas aftertreatment system, and control method

An integrated device for a pump and a nozzle, wherein the pump is for pumping a fluid medium to the nozzle, and the nozzle is for injecting the fluid medium into the exhaust gas of an engine, the integrated device comprises:

• a pump assembly having an accommodation compartment
• a pump assembly housing for housing the pump, the pump assembly housing comprising an inlet passage located upstream of the pump and in communication with the pump, and an outlet passage located downstream of the pump and in communication with the pump, the pump assembly housing also having an enclosure defining an enclosure cavity and a first housing located below the enclosure, the first housing is provided with a pressure sensor accommodation hole that is in communication with the accommodation compartment,
• a motor coil for driving the pump, a magnetic body for interacting with the motor coil, and a first gear assembly and a second gear assembly that mesh with each other, the first gear assembly comprises a first gear shaft and a first gear, the second gear assembly comprises a second gear shaft and a second gear, and the first gear meshes with the second gear;
• a nozzle assembly being at least partially housed in the accommodation compartment having the nozzle, and
• a nozzle assembly housing for housing the nozzle, the nozzle assembly further comprising a nozzle coil for driving the nozzle;
• the nozzle assembly being in communication with the outlet passage on the pump assembly housing;
• a pressure sensor accommodated in the pressure sensor accommodation hole in the first housing of the enclosure, the pressure sensor not having an independent housing, and the enclosure serving as a housing of the pressure sensor;
• and
• a controller connected to the motor coil and the nozzle coil, and the controller separately controlling the pump and the nozzle independently.