Cooler heat exchange efficiency test bench for exhaust gas recirculation and control method thereof

Abstract

The invention, which belongs to the field of the gas supply system for the internal combustion engine, particularly relates to a cooler heat exchange efficiency test bench for exhaust gas recirculation and a control method thereof. The test bench comprises a front EGR pipe, an EGR cooler, a rear EGR pipe, an EGR deflating valve, an EGR return pipe, a coolant discharge pipe, a coolant inlet pipe, acoolant pump, a coolant three-way valve, an auxiliary cooler, a check valve, a low-temperature gas pipe, a high temperature gas pipe, a gas gasifier, a cold EGR temperature sensor, a coolant high-temperature sensor, a low-temperature gas temperature sensor, and a high-temperature gas temperature sensor. According to the test bench, signals of the cold EGR temperature sensor, the coolant high-temperature sensor, the low-temperature gas temperature sensor, and the high-temperature gas temperature sensor are transmitted to an ECU and a control signal of the ECU is conveyed to the EGR deflating valve, the coolant three-way valve, and the check valve, thereby realizing active controlling of the EGR air temperature and the gas temperature. Therefore, a phenomenon of performance reduction causedby icing of the gasifier and EGR cooler dirt is avoided; and the heat exchange efficiency is high and the energy is saved.

Description

technical field [0001] The patent of the invention belongs to the field of gas supply system for internal combustion engines, and specifically relates to a heat exchange efficiency test bench of an exhaust gas recirculation intercooler and a control method thereof. Background technique [0002] Exhaust gas recirculation (EGR) technology is one of the effective measures to solve NOx emissions from diesel engines, especially after intercooling EGR can achieve a better compromise level in terms of nitrogen oxides (NOx), particulates (PM) and economy. Has been widely used. The emission of harmful substances such as particulates (PM) and nitrogen oxides (NOx) produced by traditional internal combustion engines has become a prominent problem that endangers the environment, and gas fuel engines are one of the effective measures to solve the above problems. During the use of gaseous fuel, it is generally necessary to gasify the compressed and stored gaseous fuel before feeding it i...

AI Technical Summary

Problems solved by technology

During the use of gaseous fuel, it is generally necessary to gasify the compressed and stored gaseous fuel before feeding it into the engine for combustion. During the gasification process, heat needs to be absorbed, and the general method of heating with a heating device and exchanging heat with air will increase issues such as extra energy consumption or icing affecting gasification

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