Device for collecting lubricating oil of crankcase ventilation system and engine oil collecting method for device

Abstract

The invention provides a device for collecting lubricating oil of a crankcase ventilation system and an engine oil collecting method for the device, which aim to better test and evaluate the engine oil separation efficiency of an engine oil separation device and objectively reflect the measurement level of the lubricating oil of an engine. The device for collecting the lubricating oil of the crankcase ventilation system comprises a three-way valve, a heat insulation cavity, a vacuum pump and a pressure regulating valve, wherein an output end of the three-way valve is communicated with an air inlet of the heat insulation cavity; an air outlet of the heat insulation cavity is communicated with the vacuum pump through the pressure regulating valve; the heat insulation cavity is provided with a heating device; and the air inlet and the air outlet of the heat insulation cavity are isolated from each other through filter paper. The device has a simple structure; by the device and the method, the influences of heat engine and cold engine processes on engine oil collecting results can be effectively eliminated; simultaneously, the influences of a complete set of cascade engine oil collecting device on the pressure, flow, flow velocity and engine oil carrying capacity of the crankcase ventilation system can also be eliminated; and in the collection process, temperatures are constant, the influence of an ambient environment air temperature on a collected object can be eliminated, and a test result is accurate.

Description

technical field [0001] The invention belongs to the technical field of crankcase ventilation of an automobile engine, and in particular relates to an oil collection device and a method for collecting oil in a crankcase ventilation system. Background technique [0002] Engine crankcase ventilation system is a new technology adopted by internal combustion engines for vehicles since the 1960s. It can improve engine performance, increase engine service life, and reduce the emission of pollutants from internal combustion engines. The forced ventilation method is widely used in modern automobile engines to achieve the purpose of ventilation, that is, the gas in the crankcase is sucked by the suction of the engine intake system, and the combustible mixture and exhaust gas that have entered the crankcase are sucked into the cylinder again. Combustion, so as to realize the recovery and utilization of exhaust gas in the crankcase. This not only helps to improve the economy of the en...

AI Technical Summary

Problems solved by technology

The above test method has the following deficiencies, which lead to inaccurate measurement results and cannot reflect the real engine oil level: 1. The temperature of the condensed water cannot be accurately controlled, and the condensation effect of the condenser varies greatly with the water temperature; the glass collection bottle is directly exposed to the test In the environment, the collection result is greatly affected by the temperature difference of the surrounding environment. Sometimes gasoline and water may condense in the mixture due to the low temperature; 3. After the condenser and the collection bottle are connected in series, the pressure, flow, flow rate and even the oil carrying capacity of the crankcase ventilation system will be affected.

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