A structure based on ng engine passenger car heater pipeline

Abstract

The invention discloses a structure based on an NG engine passenger car heating pipeline, which includes a water outlet main pipeline (4), a return water main pipeline (5), an exhaust heater (6), a water outlet main pipeline (4) and a first pipe The water outlet end of the pipeline (15) is connected to the water inlet end of the defroster (1) through the first two-position three-way valve (10), and the water inlet end of the first pipeline (15) is passed through the third two-position three-way valve (12) Connected to the water outlet of the water pump (7); the water inlet of the return main line (5) and the second line (16) passes through the second two-position three-way valve (11) and the defroster (1) The water outlet of the second pipeline (16) and the water outlet of the main return water pipeline (5) are connected to the engine water return port (8) through the tee pipe (13). The invention effectively solves the problem of high engine water temperature in summer operation of the NG engine passenger car, reduces the heat dissipation burden of the engine radiator, makes the engine work more efficient, and ensures the safe and reliable operation of the passenger car.

Description

technical field [0001] The invention relates to a structure based on an NG engine passenger car heating pipeline, and belongs to the technical field of passenger car cooling pipelines. Background technique [0002] At present, rear-mounted NG engine buses are equipped with exhaust heaters to replace independent heating devices to meet the heat source supply for the defroster and radiator inside the bus, so that the bus can run in a safe and comfortable working state; but with exhaust heaters For NG engines, when the vehicle is running in summer, the heated water will return to the engine's water inlet steel pipe and enter the large circulation system of the engine's own radiator, so that the heat dissipation capacity of the NG engine radiator will decrease, and in severe cases it will cause Damage to NG engines. [0003] Through the actual analysis of the various connection structures of the warm air and water pipelines of the rear-mounted NG engine bus, it is found that wh...

AI Technical Summary

Problems solved by technology

[0002] At present, rear-mounted NG engine buses are equipped with exhaust heaters to replace independent heating devices to meet the heat source supply for the defroster and radiator inside the bus, so that the bus can run in a safe and comfortable working state; but with exhaust heaters For NG engines, when the vehicle is running in summer, the heated water will return to the engine's water inlet steel pipe and enter the large circulation system of the engine's own radiator, so that the heat dissipation capacity of the NG engine radiator will decrease, and in severe cases it will cause NG engine damage

[0003] Through the actual analysis of the various connection structures of the warm air and water pipelines of the rear-mounted NG engine bus, it is found that when the NG engine bus is running in summer, the liquid heated by the exhaust heater tends to produce a large amount of gas, and the large amount of gas produced at this time The gas will circulate in the pipe together with the warm air and water to form interval water flow, and this kind of water flow with gas section will eventually flow into the engine radiator through the engine water inlet steel pipe due to the circulation principle, resulting in engine internal The air resistance increases, and the resistance of the water flow inside the engine at this time will also continue to increase; when the coolant cannot circulate smoothly inside the engine due to the generation of gas, it will continue to flow through the expansion tank of the engine. If the coolant overflows outside, the vehicle will show that the engine is extremely prone to lack of coolant during operation, which will cause the operating temperature of the engine to rise continuously, which greatly affects the safety of the engine during the operation of the vehicle

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