Coolant liquid external circulating system for engine bench test

Abstract

The invention is to protect the coolant extrinsic cycle system of the engine bench test. The engine water-yielding is educed the cooling liquid pipe which returns to the engine infall after passing a heat exchanger to form a closed circle. The cool end pipe of the heat exchanger is installed with the valve which is closed. The temperature sensor is set in the engine water-yielding and the signal line is connected to the controlling unit which the controlling line is connected with the valve and the alarming device. The controlling unit is set with two temperature value, one is the highest cooling liquid temperature endured by the engine and the other is the proper cooling liquid temperature of the engine. The invention can shorten the warming time of the engine and improve the quality and reliability of the engine bench test.

Description

technical field [0001] The invention relates to a system for engine bench testing. Background technique [0002] When the engine is tested on the bench, the engine coolant is generally led out to the cooling system outside the bench for cooling. The original cooling cycle device is to introduce the engine cooling water into a large water tank through the pipeline, and control the cooling water in the water tank. The temperature of the water, the temperature-controlled water re-enters the engine through the pipeline. The system has the following problems: (1) When the engine is in the reliability test, the body is seriously scaled, which will seriously affect the performance of the engine. Heat dissipation; (2) Due to the large water capacity of the original system, the engine warm-up time is long, more than 30 minutes, and the cooling water temperature control range is large, with the set temperature ±10°C, which does not meet the requirements of th...

AI Technical Summary

Problems solved by technology

[0002] When the engine is tested on the bench, the engine coolant is generally led out to the cooling system outside the bench for cooling. The original cooling cycle device is to introduce the engine cooling water into a large water tank through the pipeline, and control the cooling water in the water tank. The temperature of the water, the temperature-controlled water re-enters the engine through the pipeline. The system has the following problems: (1) When the engine is in the reliability test, the body is seriously scaled, which will seriously affect the performance of the engine. Heat dissipation; (2) Due to the large water capacity of the original system, the engine warm-up time is long, more than 30 minutes, and the cooling water temperature control range is large, with the set temperature ±10°C, which does not meet the requirements of the national test standard

(2) There is only temperature display and control, no temperature alarm function, and the engine cannot be effectively protected under abnormal conditions; (5) The function is single, and the test above 100°C and below 38°C cannot be carried out

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