Constant temperature device of engine oil

Abstract

The invention discloses a constant temperature device of engine oil. The constant temperature device comprises a heat exchanger, an external medium circulating pipeline and an engine oil circulating pipeline; the heat exchanger is provided with an engine oil heat exchange pipeline and an external medium heat exchange pipeline respectively communicated with the engine oil circulating pipeline and the external medium circulating pipeline; the engine oil circulating pipeline comprises a main oil inlet path and a main oil return path; an oil inlet temperature sensor is arranged on the engine oil circulating pipeline; a three-way valve for carrying out proportional control and temperature control on the engine oil of an engine is arranged on the main oil return path; the main oil inlet path is divided into a first oil path and a second oil path; the first oil path is connected with an oil inlet of the three-way valve; the second oil path is connected with the oil inlet end of the engine oil heat exchange pipeline; an oil outlet end of the engine oil heat exchange pipeline is connected with another oil inlet of the three-way valve, and the oil outlet of the three-way valve is connected with the main oil return path. According to the invention, the flow of the oil liquid flowing into the heat exchanger is controlled through the three-way valve and mixed with the flow which does not flow into the heat exchanger according to a certain ratio, so that the temperature of the oil flowing into the engine is accurately controlled.

Description

technical field [0001] The invention relates to an engine oil constant temperature device. Background technique [0002] The fuel consumption rate is one of the most important indicators of the engine. During the test of the engine, the change of the oil inlet temperature will have a significant impact on the engine fuel consumption rate. In order to correctly evaluate the engine fuel consumption rate index, it is necessary to keep the fuel at constant temperature. For example, the Chinese patent announcement number is CN1996198B, the announcement date is June 16, 2010, and the name is "an improved engine test bench oil constant temperature control method and system". The system includes an engine oil circulation system connected to the engine oil inlet and outlet, a heat exchanger is arranged on the engine oil circulation system, and a cooling water circulation system for heat exchange with the engine oil circulation system in the heat exchanger, and the oil circulation pip...

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Problems solved by technology

[0002] The fuel consumption rate is one of the most important indicators of the engine. During the test of the engine, the change of the oil inlet temperature will have a significant impact on the engine fuel consumption rate. In order to correctly evaluate the engine fuel consumption rate index, it is necessary to keep the fuel at constant temperature. For example, the Chinese patent announcement number is CN1996198B, the announcement date is June 16, 2010, and the name is "an improved engine test bench oil constant temperature control method and system". The system includes an engine oil circulation system connected to the engine oil inlet and outlet, a heat exchanger is arranged on the engine oil circulation system, and a cooling water circulation system for heat exchange with the engine oil circulation system in the heat exchanger, and the oil circulation pipeline includes The oil intake and delivery pipeline, the engine oil delivery pipeline is equipped with an electric control valve with a temperature sensor, and the engine oil supply pipeline is equipped with an oil pump. Temperature, the oil circuit of this structure, the engine oil must go through a cooling process with the heat exchanger, but when the engine outlet oil temperature is low, the engine oil does not need to be cooled, if it will affect the performance of the engine after being cooled by cooling water It will cause the engine to be difficult to start, making the experimental data inaccurate, and this structure can only take oil from the engine oil pan, not suitable for the operation of taking oil from the main oil passage of the engine

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