Waste gas and waste heat reusing system, engine and vehicle

Abstract

The invention discloses a waste gas and waste heat reusing system, an engine and a vehicle and relates to the vehicles. The waste gas and waste heat reusing system is applied to the vehicle. The vehicle comprises the engine, an engine water path and an engine gas path. The waste gas and waste heat reusing system comprises an EGR system and a waste heat recovery system. The EGR system is arranged at the engine gas path and used for recycling and refluxing waste gas exhausted by the engine into the engine for reusing after the waste gas is cooled and enabling the waste gas to be used for warming up the engine at the same time. The waste heat recovery system is arranged at the engine water path and is used for absorbing waste heat by the EGR system to warm up the engine after low-temperature cold start of the engine. According to the waste gas and waste heat reusing system, the engine and the vehicle, with arrangement of the waste gas and waste heat reusing system on the vehicle engine, the waste heat recovery system is integrated into the EGR system, so that the structure arrangement of the exhaust side of the engine is compacter, and the risks of uneven heating and local boiling of a heat exchanger in the application process of the traditional waste heat recovery technology are prevented.

Description

technical field [0001] The invention relates to a vehicle, in particular to an exhaust gas and waste heat recycling system, an engine and a vehicle. Background technique [0002] EGR (English full name: Exhaust Gas Recirculation, Chinese translation: Exhaust Gas Recirculation) technology and waste heat recovery technology play an important role in engine fuel saving and emission reduction. With the increasingly stringent national emission regulations, the application of EGR technology and waste heat recovery technology will inevitably become the mainstream of engine technology upgrades for major OEMs. [0003] However, the application of low-pressure EGR technology and waste heat recovery technology in supercharged gasoline engines still faces some difficulties. First, the application of low-pressure EGR technology and waste heat recovery technology makes the structural arrangement of the exhaust side of the engine more complicated, which is not conducive to the compact des...

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Problems solved by technology

[0003] However, the application of low-pressure EGR technology and waste heat recovery technology in supercharged gasoline engines still faces some difficulties

First, the application of low-pressure EGR technology and waste heat recovery technology makes the structural arrangement of the exhaust side of the engine more complicated, which is not conducive to the compact design of the engine

Second, when the engine starts cold at low temperature, the EGR system does not work, the EGR valve is closed, and the coolant flows through the EGR cooler, which increases the cooling loss of the coolant to a certain extent, prolongs the warm-up time, and is not good for the engine's fuel consumption and emissions

Third, in the current application process of waste heat recovery technology, there is a risk of uneven heating of the heat exchanger and local boiling

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