关键词: 汽车, 驱动桥, 传动效率, 试验台

Abstract:

A test bench was developed for transmission efficiency testing. With this test bench, the key factors that had impacts on the transmission efficiency of automobile drive axle could be found, the influence regularity of these factors on the transmission efficiency could be determined, and finally, an effective method to improve transmission efficiency was proposed, which had very important significance to improve the dynamic performance and fuel economy of automobile. Adopting the modularization design, the test bench has the advantages of quick installation, convenient operation and high automation degree. The torque and speed controls of the test bench were achieved through direct torque control, dynamic loading was realized through harmonic drive and planetary transmission, and system energy feedback was  brought to a reality through DC bus technology. The practice indicates that the control precision of the test bench has achieved the anticipated target.

Key words: automobile, drive axle, transmission efficiency, test bench