Engine aftertreatment system and vehicle

Abstract

The present disclosure relates to an engine aftertreatment system and a vehicle. In the engine aftertreatment system, the oxidation catalyst is arranged in the engine compartment and its air intake is used to communicate with the exhaust port of the engine, and the particulate matter filter is arranged in the On the vehicle frame outside the engine compartment and its exhaust port communicates with the exhaust port of the oxidation catalyst through the first pipeline, the low-pressure EGR system is arranged in the engine compartment and its air intake is connected with the particulate matter filter through the second pipeline Filtered side air intake, its exhaust port is used to communicate with the intake port of the engine, the intake port of the selective catalytic reduction converter is connected to the exhaust port of the particulate filter, the intake port of the ammonia purification catalyst is connected to the selective The exhaust port of the catalytic reduction converter is connected, and the exhaust port is used to communicate with the external environment. By setting the particle filter on the frame outside the engine compartment, the use of the internal space of the engine compartment is reduced, thereby reserving a certain space to meet the layout requirements of the low-pressure EGR system.

Description

technical field [0001] The present disclosure relates to the technical field of vehicles, and in particular, relates to an engine aftertreatment system and a vehicle. Background technique [0002] With the continuous deepening of my country's environmental protection and atmospheric governance, the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine issued the "Light Vehicle Pollutant Emission Limits and Measurement Methods ( China's sixth stage)" will be implemented on July 1, 2020, and "Heavy-duty diesel vehicle pollutant emission limits and measurement methods (China's sixth stage)" will be implemented on July 1, 2019. China has officially entered the era of "National VI". The aftertreatment system of the engine becomes the key to making light and heavy vehicles meet the "National VI" emission standards. [0003] In order to meet the emission standards of China 6b, a low-pressure EGR system is often arrang...

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Problems solved by technology

[0003] In order to meet the emission standards of China 6b, a low-pressure EGR system is often arranged in the aftertreatment system to treat the exhaust gas. However, in some models, such as mid-engine models, the mid-engine cabin is mostly arranged under the seat. The space is too small to meet the space layout requirements of the low-pressure EGR system, and the technical route often needs to be replaced, resulting in a huge development workload, that is, development costs

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