egr integrated system and its intake manifold

Abstract

The invention discloses an EGR integrated system and its intake manifold. The EGR integrated system includes an exhaust gas pipeline, part of the exhaust gas discharged from the engine flows to the exhaust gas pipeline, an EGR air pump communicated with the exhaust gas pipeline, and an exhaust gas pipeline. chamber, EGR valve; the EGR air pump pumps the exhaust gas in the exhaust gas pipeline to the exhaust gas chamber, and the EGR valve is arranged between the exhaust gas chamber and the engine intake manifold passage to adjust the amount of exhaust gas in the exhaust chamber entering the intake manifold. The above-mentioned EGR integrated system is equipped with a special exhaust gas chamber, and part of the exhaust gas discharged from the engine is pressurized and stored in the exhaust gas chamber, so that the exhaust gas chamber can store relatively high-pressure exhaust gas. According to the combustion demand, the amount of exhaust gas mixed with fresh air entering the intake manifold can be adjusted by controlling the opening of the EGR valve, so as to maintain the normal operation of the system and ensure the required EGR rate.

Description

Technical field [0001] The present invention relates to the technical field of vehicle, and more particularly to an EGR integrated system and its intake manifold. Background technique [0002] At present, the global emission standards and fuel consumption indicators of the internal combustion engine are constantly increasing. In order to meet the more stringent regulations, the internal combustion engine can reduce the pump loss, relieve the knock, and reduce the explosion, and reduce Conversion of demand to improve fuel economy for gasoline engines. Therefore, the EGR system will be applied to more and more projects for improving the efficiency of the engine and reducing the harmful effects of internal combustion engine emissions on the environment. [0003] The EGR system mainly includes EGR cooler, EGR valve, EGR temperature sensor, EGR differential pressure sensor. After the exhaust gas is discharged from the engine, some exhaust gas re-enters the engine through the EGR syste...

AI Technical Summary

Problems solved by technology

[0006] Relevant studies have proved that for high-pressure EGR, if the engine is at a low speed, the exhaust gas pressure is insufficient, and the exhaust gas flows through the EGR valve and the EGR cooler due to the resistance, which will cause the problem of inability to work at low speed and high load; in the case of sufficient EGR, it will also cause Poor EGR mixing and distribution;

[0007] For low-pressure EGR, the exhaust gas pressure itself is low, which will lead to poor EGR rate under the condition of low-medium speed and small load, and the long flow path will also lead to poor EGR response and other problems.

Images