An automobile fuel auxiliary heating system and its control method

Abstract

The invention relates to an automotive fuel assisted heating system and a control method thereof with an aim to mainly solve problems about discomfort of a cockpit under cold winter environment and low efficiency of cold start of an engine. A fuel assisted heater heats the cockpit and the engine respectively in the cold starting stage of a vehicle to enable the cockpit and the engine to be heated rapidly; the main technical feature is that a fuel assisted heating cycle coolant is controlled to run in a nucleate boiling regime, and heating efficiency is improved. The automotive fuel assisted heating system has the advantages that the fuel assisted heating cycle coolant is controlled to be the nucleate boiling regime, heat exchange rate is enabled to be optimized, pump loss is reduced, heat of the assisted heater is enabled to be more uniform, and damage brought to the assisted heater due to heat unevenness is reduced.

Description

Technical field [0001] The invention relates to the field of automobile thermal management, in particular to an automobile fuel auxiliary heating system and a control method thereof. Background technique [0002] In high latitude areas, when the car is parked for a long time, the vehicle temperature will be very low. When the car is cold-started, the engine wear will be very serious, and the low temperature inside the car will also bring discomfort to the driver. Therefore, an auxiliary heater is used to quickly heat up the vehicle. However, when the traditional automobile auxiliary heating system heats the coolant to a preset temperature, it will increase the power of the circulating water pump and increase the flow of the coolant, so that the temperature is kept in balance and no longer rises, but the coolant is still in the phase of single phase heat transfer at this time , The heat exchange efficiency is low, and the pump loss is large. Moreover, the traditional fuel-assis...

AI Technical Summary

Problems solved by technology

However, when the traditional automotive auxiliary heating system heats the coolant to the preset temperature, it will increase the power of the circulating water pump and increase the flow of the coolant to keep the temperature balanced and no longer rise. However, the coolant is still in the stage of single-phase heat transfer at this time. , low heat transfer efficiency, large pump loss

Moreover, the traditional fuel auxiliary heating system is pre-set in terms of priority heating of the engine or the cockpit, which lacks flexibility.

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