Engine

The utility model relates to the technical field of engines, and discloses an engine which comprises an engine body, an air inlet pipe, an air outlet pipe, an air inlet pipe and an air outlet pipe. The EGR device comprises an EGR cooler and an EGR after-cooling pipeline, the EGR after-cooling pipeline is communicated with the EGR cooler, and the EGR after-cooling pipeline is communicated with the air inlet main pipe; the air pressurization system comprises an air compressor, a compressed air pipeline and an intercooler; the compressed air pipeline comprises a main pipeline and a branch pipeline, the main pipeline is communicated with the air compressor, and the main pipeline is communicated with the intercooler; the branch pipeline is communicated with the gas compressor and the gas inlet main pipe, the axis of the branch pipeline and the axis of the EGR after-cooling pipeline are arranged in parallel, and the branch pipeline is close to the EGR after-cooling pipeline. In the engine, the branch pipeline and t