Laboratory cooling water auxiliary system for multicylinder diesel engine

The invention belongs to the technical field of test of diesel engines, and relates to a cooling water assistant system of a test chamber of a multi-cylinder diesel engine. The system comprises a hot water tank, a heat exchanger, an expansion water tank, a water pipe, a frequency converter, an electric control valve, an electromagnetic valve, a gate valve, a water filter, pipelines, and the like.Through switching on and off of the electromagnetic valve in the pipeline, different cooling water circulation loops are formed, so as to achieve stage test functions of multiple multi-cylinder diesel engines in the test chamber of the multi-cylinder diesel engine. The system can carry out stage test of multiple multi-cylinder diesel engines with or without the water pump, and expands usage functions of the test chamber.