Motor vehicle waste gas purification, separation and circulation cooling method

The invention discloses a motor vehicle waste gas purification, separation and circulation cooling method. After hot waste gas exhausted by a motor vehicle engine is pressurized by a pressurizing device, the hot waste gas is conveyed to an air inlet end of a separator. After compressed waste gas is jetted into a spiral tube swirl chamber, gas flow rotationally flows to a particulate matter gathering end outlet of a spiral tube at the speed of up to one million revolutions per minute, part of the gas flow flows out through a control valve, the rest gas is stopped, then reversely rotates at thesame rotating speed in an original gas flow inner ring and flows to a purified gas outlet end of the spiral tube. In the process, two strands of gas flow exchange heat, the inner ring gas flow is cooled, purified cold gas flows out of the purified gas outlet end, the outer ring gas flow is heated, and separated particulate matters flow out of the particulate matter gathering end. The engine purification and separation met