OIL PUMP HAVING TWO ROTORS FOR REDUCING PULSATION OF AUTOMATIC TRANSMISSION

摘要

The present invention relates to an oil pump, and more particularly, to a double oil pump for an automatic transmission for reducing ripple caused by a high fluctuating pressure generated by a cyclic unsteady flow at an outlet of a pump gear. To this end, the present invention is characterized in that, in the pump housing, the first internal circumscribed external gear and the second internal circumscribed gear are provided so as to coaxially rotate together with each other, and the unevenness of the external teeth of the first internal and external second external gears The double oil pump for an automatic transmission for pulsation reduction is provided.