Cooling system diagnosis method based on TMM

Abstract

The invention provides a cooling system diagnosis method based on a TMM. The cooling system diagnosis method comprises a thermal management module used for controlling a cooling system, a single coolant temperature sensor for monitoring the temperature of a coolant and a warm air heat exchanger for heat exchange. The cooling system diagnosis method is a more simplified and more accurate diagnosisscheme developed based on the China standard requirement and based on the cooling system of the thermal management module (TMM). Compared with a diagnosis scheme of the single coolant temperature sensor, by the adoption of the cooling system diagnosis method, the result is more accurate, and the specific reason for judging the fault of the cooling system can be accurately judged; and compared withthe diagnosis scheme of a double-coolant temperature sensor, the cooling system diagnosis scheme is more simplified, and a thermostat is not required to be monitored for the temperature difference ofthe double-coolant temperature sensor. In this way, the diagnostic scheme provides the more simplified accurate cooling system diagnostic scheme for an engine using the thermal management module.

Description

technical field [0001] The invention belongs to the technical field of automobiles, in particular to a method for diagnosing a cooling system based on a TMM module. Background technique [0002] When the internal combustion engine is running, the parts in contact with the high-temperature gas are strongly heated. If they are not properly cooled, they will overheat, resulting in a decrease in the charge coefficient, abnormal combustion, deterioration of the engine oil, a decrease in the strength and rigidity of the parts, an increase in friction loss, and increased wear. Thermal deformation and damage, resulting in overall deterioration of the power, economy, reliability and durability of the internal combustion engine. The task of the engine cooling system is to ensure that the engine works at the most suitable temperature under any conditions, and the diagnosis scheme of the cooling system is to ensure the normal operation of the cooling system. National Standard Light Veh...

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Problems solved by technology

[0002] When the internal combustion engine is running, the parts in contact with the high-temperature gas are strongly heated. If they are not properly cooled, they will overheat, resulting in a decrease in the charge coefficient, abnormal combustion, deterioration of the engine oil, a decrease in the strength and rigidity of the parts, an increase in friction loss, and increased wear. Thermal deformation and damage, resulting in overall deterioration of the power, economy, reliability and durability of the internal combustion engine

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