Engine bench machine oil consumption test device and test method

Abstract

The invention provides a wet oil sump engine bench machine oil consumption test device, including a system controller, a weighing box, a frequency conversion pump, a two-position four-way valve, a solenoid valve, a differential pressure sensor and a sampling device, and the sampling device is inserted into the engine oil In the sump, the sampling device is connected to the variable frequency pump through the solenoid valve and the two-position four-way valve in turn, and the two-position four-way valve is also connected to the weighing box and the frequency conversion pump; the high-pressure end of the differential pressure sensor is located at the engine oil pan bottom; the weighing box, frequency conversion pump, two-position four-way valve, solenoid valve and differential pressure sensor are all electrically connected to the system controller. The advantages and positive effects of the present invention are that the wet and dry engine bench oil consumption test device and test method have the following advantages: it can meet the general requirements of the wet oil bottom and dry oil bottom engine bench oil consumption tests, and the measurement is fast and convenient Simple installation, operation and maintenance, high measurement accuracy.

Description

technical field [0001] The invention belongs to the technical field of engine testing, and in particular relates to an engine bench oil consumption test device and a test method. Background technique [0002] Engine oil consumption has a considerable impact on engine reliability, economy and engine life. The engine needs to lubricate the piston, piston ring and cylinder under working condition. When the lubricating oil is insufficient, the sealing effect of the piston ring is reduced, the wear is intensified, and the cooling effect of the piston ring is hindered; if the lubricating oil is supplied excessively, the remaining lubricating oil enters the combustion chamber, which is not only economical, but also forms incomplete combustion, resulting in Deposits become the cause of piston ring sticking and seizure. At the same time, for diesel engines, it will lead to an increase in the particulate content in the exhaust gas. Therefore, it is required to measure the accurate e...

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Problems solved by technology

The accuracy of this measurement method is affected by the cross-section of the fuel tank. The larger the cross-section, the lower the measurement accuracy of the fuel tank, and the amount of oil stored in the crankcase will be different under different operating conditions of the engine, thereby introducing measurement errors; 2) The dual-turbine sensor is used to obtain Real-time engine oil consumption measurement method based on the difference between inlet and outlet oil flow rates

The accuracy of this measurement method is limited by the stability of the engine's operating conditions, and in order to ensure smooth oil return, the oil return pipeline of the conventional engine test bench is thicker than the oil inlet pipeline, so it is often accompanied by the inhalation of air bubbles, and the measurement accuracy is poor

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