Engine Cooling Device of New Energy Vehicle

Abstract

With the environmental pollution and the shortage of oil resources becoming more and more serious, the development and application of new energy vehicles have attracted more and more attention. Engine is an important part of new energy vehicles, and its performance has a great impact on the vehicle. Compared with traditional industrial motors, new energy vehicle engines have higher requirements on power density, and the improvement of power density poses new challenges to the design of motor cooling system. The purpose of this paper is to study the engine cooling device of new energy vehicles and improve the overall performance of the vehicle. The main research content of this paper is to lay a foundation for the theoretical basis of the engine cooling device, elaborate the working principle of the motor cooling system and the loss of the motor in operation. Then, the heat dissipation system of permanent magnet synchronous motor based on heat pipe is studied experimentally. Aiming at the problem of only considering the temperature rise and ignoring the pressure loss in the flow channel design, a flow channel design method considering the motor temperature rise and the flow channel pressure loss is proposed, and the motor flow channel is optimized. The test results show that the maximum temperature rise at the end is close to 16.56 °C, which is in good agreement with the simulation results. It shows that the heat pipe based heat dissipation system can effectively reduce the temperature rise of motor winding, which provides a new idea for the heat dissipation design of permanent magnet synchronous motor

A Novel Intelligent Fan Clutch for Large Hybrid Vehicles

“…These switch-type clutches can only combine or disengage the clutch at a specific temperature and cannot adapt to the cooling requirements at various temperatures [13,14]. An electromagnetic clutch can be electronically controlled to achieve multi-stage speed control, but with the introduction of additional control devices to reduce the reliability of the clutch, the structure is more complex, and for some hybrid vehicles in harsh environmental conditions, the traditional electromagnetic clutch struggles to ensure the stability of the work of the transmission system [15,16]. Based on this, in order to solve the defects of complex clutch structure, low reliability, and high power consumption in the transmission system of hybrid vehicles [17,18], in this paper, an intelligent fan clutch based on the shape memory effect of SMAs is proposed.…”