A heavy-duty diesel engine integrated combined water pump and a control method for the water pump

Abstract

The invention relates to a heavy-duty diesel engine integrated combined water pump and a control method for the water pump. The water pump includes an electromagnetic clutch water pump, an electric water pump, an engine controller, a water temperature sensor, an engine speed sensor, an air intake flow sensor, an engine oil temperature sensor and an instrument panel; the electromagnetic clutch water pump and the electric water pump are installed on the engine in parallel; the engine controller is installed on On the engine; the water temperature sensor is fixed at the water inlet of the water pump; the engine speed sensor is installed on the engine flywheel; the water temperature sensor, engine speed sensor, intake flow sensor, and engine oil temperature sensor are all connected to the engine controller; the engine controller is connected to the instrument panel; The invention can ensure that the water flow rate of the cooling system meets the use requirements when the electric water pump motor fails under extreme working conditions; Efficiency improvement.

Description

technical field [0001] The invention belongs to the technical field of automobiles, in particular to a heavy-duty diesel engine integrated combined water pump and a control method for the water pump. Background technique [0002] The traditional engine cooling system mainly uses a mechanical fixed-displacement water pump as the power source of the cooling system. The advantage of this solution is that the technology is mature and the product is reliable. The demand for water flow in the most severe working conditions results in excess performance of water pumps in most working conditions; ②Fixed displacement water pumps need to be driven by engines, which consumes engine output power and affects the improvement of engine efficiency. With the formulation and stricter regulations on fuel consumption of commercial vehicles, in order to improve engine efficiency and reduce fuel consumption, in recent years, MAHLE and other companies have developed electronically controlled silic...

AI Technical Summary

Problems solved by technology

[0002] The traditional engine cooling system mainly uses a mechanical fixed-displacement water pump as the power source of the cooling system. The advantage of this solution is that the technology is mature and the product is reliable. The water flow requirements of the most severe working conditions cause excess performance of water pumps in most working conditions; ②Fixed displacement water pumps need to be driven by engines, which consumes engine output power and affects the improvement of engine efficiency

With the formulation and stricter regulations on fuel consumption of commercial vehicles, in order to improve engine efficiency and reduce fuel consumption, in recent years, Mahle and other companies have developed electronically controlled silicon oil pumps to solve the problem of on-demand supply of water pumps, but the water pump still needs the engine to provide driving power.

[0003] Electric water pumps can solve the problem of on-demand supply of mechanical water pumps and direct consumption of engine power, but the main reasons why they have not been adopted are: ① The electric energy consumed by electric water pumps needs to be indirectly obtained by generating power from the output power of the engine, so the efficiency is lower than that of mechanical water pumps; ② The power of the heavy-duty diesel engine water pump is too large under common working conditions, and there is a problem of capacitor overload; ③The reliability of the motor is poor, and the long-term use of the diesel engine cannot be guaranteed

Images