Control method and device of separation and reunion type water pump for engine

Abstract

The invention provides a control method and device of a separation and reunion type water pump for an engine. The control method comprises the steps that S1, the current engine water temperature is collected; S2, the magnitude of the current engine water temperature and a cold start threshold value is judged, if the current engine water temperature exceeds the cold start threshold value, the separation and reunion type water pump is controlled to enter a normal working state, and if the current engine water temperature does not exceed the cold start threshold value, the separation and reunion type water pump is controlled to enter a cold start mode; S3, in the cold start mode, a temperature partition where the current engine water temperature is located is judged, and according to the temperature partition, the opening time and closing time of current working circulation of the separation and reunion type water pump are obtained and output to the separation and reunion type water pump; and S4, when the situation that the engine water temperature exceeds the cold start threshold value is detected, the separation and reunion type water pump is controlled to exit the cold start mode and enter the normal working state. Precise control over the separation and reunion type water pump can be realized, and the effect of fast machine warming is guaranteed to the maximum limit.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a control method and device for a clutch-type water pump for an engine. Background technique [0002] In the cooling system of the engine, the water pump is a component that provides circulation kinetic energy for the coolant and enables the engine to exchange heat with the air. At present, there are three types of products on the market: traditional mechanical water pumps, clutch water pumps and electronic water pumps. The traditional mechanical water pump is driven by the engine through the pulley, and its speed is proportional to the engine speed, and the flow cannot be adjusted; the electronic water pump directly provides kinetic energy through the battery, and the flow can be adjusted at any time. It is the best solution in the cooling system, but due to the high cost High, and the motor has high requirements. Usually, the power and flow are limited, and it is difficult...

AI Technical Summary

Problems solved by technology

The traditional mechanical water pump is driven by the engine through the pulley, and its speed is proportional to the engine speed, and the flow cannot be adjusted; the electronic water pump directly provides kinetic energy through the battery, and the flow can be adjusted at any time. It is the best solution in the cooling system, but due to the high cost High, and the motor has high requirements. Usually, the power and flow are limited, and it is difficult to meet the requirements of high-power engines. The clutch water pump is a compromise between the traditional mechanical water pump and the electronic water pump. Flow, and then achieve the purpose of rapid warm-up of the vehicle

[0003] Realizing fast warm-up is the main function of the clutch water pump. The existing control method is usually to directly set the opening t of the water pump. on , closing time t off , but the working conditions of the engine are usually changing, and different heat dissipation has different requirements for time allocation, so it is impossible to realize the stepless adjustment of the flow rate

In addition, when diagnosing the difference between the temperature of the engine body and the temperature of the coolant, an additional body temperature sensor is required, which requires high cost and the algorithm is cumbersome.

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