Variable displacement oil pump control system and control method thereof

Abstract

The invention provides a variable displacement oil pump control system and a control method thereof. A first feedback oil duct and a second feedback oil duct of the control system are both connected between a main oil duct and a variable displacement oil pump. An electromagnetic valve is installed on the first feedback oil duct and is connected with an ECU through a wiring harness. A sensor set is in signal connection with the ECU. The ECU receives detection signals of the sensor set, control signals are sent to the electromagnetic valve after the detection signals are analyzed and judged by a control strategy module inside the ECU, and the electromagnetic valve executes corresponding movements according to the control signals. By the adoption of the control method, the ECU is used for receiving the engine rotating speed, engine loads, oil temperature signals and oil pressure signals sent by the sensor set, and the working mode of the variable displacement oil pump can be intelligently selected through the internal control strategy module inside according to the actual using conditions of an engine. By means of the variable displacement oil pump control system and the control method thereof, the displacement of the oil pump can be intelligently adjusted, the problem that the capacity of a commonly-used working condition oil pump of the engine is excessive and thus oil consumption is made high is solved, and the oil economy of an entire vehicle is improved.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to a variable displacement oil pump control system and a control method thereof, which are applied in a gasoline engine lubricating system. Background technique [0002] Fuel economy is an important index to evaluate the advancement of engine technology; in the past engine development process, the rotor fixed pump was often used, and the displacement of the oil pump was determined according to the engine's extreme working conditions, and the displacement was not variable Therefore, when the engine works under normal working conditions, on the one hand, it will cause the oil pressure to be much higher than the demand of the engine; ; The above two aspects will cause the engine to work under normal operating conditions, and the oil pump will cause high fuel consumption due to excess capacity. Contents of the invention [0003] The object of the present invention is ...

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Problems solved by technology

[0002] Fuel economy is an important index to evaluate the advancement of engine technology; in the past engine development process, the rotor fixed pump was often used, and the displacement of the oil pump was determined according to the engine's extreme working conditions, and the displacement was not variable Therefore, when the engine works under normal working conditions, on the one hand, it will cause the oil pressure to be much higher than the demand of the engine; ; The above two aspects will lead to the problem of high fuel consumption due to excess capacity of the oil pump when the engine is working under normal conditions

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