Trochoidal toothed oil pump with thin discharge channel communicating with discharge chamber

摘要

A trochoidal oil pump including a housing defining an internal space; an outer rotor fitted rotatably in the internal space of the housing and having internal teeth; an inner rotor having outer teeth meshing with the internal teeth of the outer rotor to define a sealed space therebetween; and suction and discharge chambers formed in the housing and opened into the internal space of the same. The discharge member is formed to begin at an angle l formed in the direction of forward rotation from the dedendum to the beginning portion of the discharge chamber extending in the direction of forward rotation and defined by the following relationship: l1